Reinstallation of Two Cable Crane Cables in Khersan 3 Dam
Two long cables called Cable Cranes, which were used in Karun 4 concrete dam for the concrete construction stage of the dam body, were successfully released by Payab Zamzam Company and reinstalled in Khersan 3 dam. These long cables, which are 97 mm in diameter, with a force of 180 tons, were stretched synchronously by two jacks of 400 tons capacity and installed on the local steel structure. In this operation, the cables are stretched about 70 meters to reach the desired profile. The operation was carried out with great care to prevent the parts from spinning and the force imbalance on the sides of the cable.
December 2024
Continuation of the excavation monitoring operation of the Jahan Mall commercial complex in Mashhad
This operation, which began at the beginning of 2023, is aimed at reading the movements of the ground around the pit of the Jahan Mall Grand Complex in the holy city of Mashhad. In addition to the mapping method, the behavior of the pit is through 11 inclinometers that are installed around the pit and up to a depth of 24.5 meters. Every month, the readings of these holes are done with the help of the inclinometer of the Payab Zamzam Company, and a written illustrated report is presented to the employer. So far, the movement of the wall has generally been in a safe area, but in some places where the movements are far from the usual limits, the necessary warnings have been given to the employer.
December 2024
Supply of convergence meters and pins for Kani Mes Company
Kani Mes Company, which is one of the prominent activists in the mining industry, recently ordered a convergence meter and its accessories from Payab Zamzam to record behavior of one of its tunnels. The company is currently operating the largest copper condensing plant in the Middle East at the Sungun copper mine.
November 2024
Installation and reading of Inclinometer in Chitgar Park, Tehran Metro Line 10
Following the continuation of tunneling operations on line 10 of the Tehran metro, it was located in the area of Chitgar Park to record the lateral movements of the ground with the help of a inclinometer tool. Following the signing of the tool purchase contract with Payab Zamzam Company, a number of ABS casings were installed around the route and station of the mentioned line and the operator was trained in data gathering operations. The inclinometer of this project is produced by Payab Zamzam Company and it is planned to record the lateral movement of the ground by performing continuous surveys and ensure the security of the tunnel and the areas around the station.
October 2024
Installation and reading of tiltmeter, strain gauges and inclinometers in the pit of Andarzgoo Street
Following the start of excavation operations on a land located on Andarzgoo Boulevard, a number of tiltmeters, strain gauges and inclinometers were installed by Payab Zamzam Company around the said pit and the employer was trained in data gathering operations. The tiltmeter device of this project is produced by Payab Zamzam Company and it is planned to record the lateral movement of the pit by performing continuous harvesting and ensure the security of the surrounding structures as well as the wall of the pit.
September 2024
Beginning of executive operations and installation of instrumentation on the conveyor belt structure No. 2 of Sarcheshmeh copper mine
Following manufacturing of the instruments intended to be installed on the conveyor belt structure, which includes digital two-axis tiltmeter, strain gauge, and accelerometer, their installation operations in the project began. The executive operation began with the installation of ducts and cables and the installation of plates related to the connection of the mentioned tools. The installation of tools, which is done at very high heights, is sometimes done with the help of specialized (rappelman) personnel and by hanging from the structure and installing it on the columns of the structure. After the installation of the cables is completed and the tools are connected to the structure, all sensors are connected to the panel and the automatic data acquisition system (DAS), and then the software engineerings are done. The data generated from these instruments is collected and stored in a special room and sent wirelessly to the central control room. A software will also be prepared that will inform the management of any failure in the structural elements online.
September 2024
Continuation of the post tensioning operation of the concrete deck at the Great Bridge of the Northern Karaj Freeway
The post tensioning operation of the Great Freeway Bridge of the Northern Bypass of Karaj continued. During the past months until this date, 6 segments were constructed on the sides of each of the piers in a balanced manner. The implementation of isostatic and hyperstatic cables and the operation of stressing these parts at the high height of this bridge are among the special operations in the mentioned bridge that are being carried out by the Payab Zamzam executive team.
August 2024
The executive operation of the improvement and modification of Shushtar stay cable bridge began
The improvement and modification of the stay cable bridge in Shushtar, which is the first cable bridge implemented in the country, began in the summer of 2024 with the site setup and the construction of access carriages under the bridge deck. At the same time as these preparations were made, the order for new seismic isolators, which are to replace the current neoprenes, was given to OVM. After receiving these separators, the bridge deck is raised with the help of flat jacks and these parts are placed under the deck. Also, all the covers of 72 anchors of this bridge were opened and the accuracy and integrity of the relevant cables and wedges were inspected. In addition, the stress of the cables was determined by the vibration measurement method. In this method, which is performed for the first time in Iran by Payab Zamzam Company, the cables vibrate and after measuring the vibration modes and the natural frequencies of this vibration, the amount of force of the cables is measured. The measurement of cable vibration is done by the company’s accelerometers. Other executive activities of the bridge, Neoperene replacement, and repairing the worn concrete sections, etc. are also progressing.
July 2024
The second phase of the Karun Island Bridge Repair Program has begun
The Karun Island cable bridge underwent modifications last year (such as replacing torn cables and jamming the pylon). The continuation of this operation (due to the filling of the contract ceiling) was postponed until this year. The replacement of some other cables and the inspection of other cables and the related anchorage will be done at this stage.
May 2024
Instrumentation and monitoring of the conveyor belt No. 2 of Sarcheshmeh copper mine started
The structure containing conveyor belt No. 2 of Sarcheshmeh copper mine, which has a length of 155 meters, a width of 6 meters, and a height of 32 meters above the ground, is a huge truss structure. The high speed of the conveyor belt and mineral ores over it and the need to continuos operation of the strip to supply continuous feed to the factory have highlighted the need to monitor the structure of the belt, which is affected by static and dynamic forces. In this regard, a contract has been signed with Payab Zamzam Company for the installation of a number of static and dynamic instrumentation. The data generated from these instruments is collected and stored in a special room and is sent wirelessly to the central control room. A software will also be prepared that will inform the management of any damage in the structural elements online.
May 2024
The contract for the treatment and repair of the Shushtar cable bridge was awarded to Payab Zamzam Company
The cable bridge of Shushtar, which is the first cable bridge implemented in the country, needs to be inspected, repaired, and corrected for its long-term service and the occurrence of some abnormal behaviors. Due to the history of Payab Zamzam Company in the supply of materials and the implementation of cable bridges, this contract was awarded to Payab Company. The operation includes inspecting all anchorages and pipes, as well as changing some dampers and friction separators and determining the force in the bridge cables. The operation will begin in June.
May 2024
Installation of Tiltmeter in Chalous Bridge
At the end of 2023, 10 tiltmeters with electronic sensors along with the relevant logger were supplied by Payab Zamzam Company to monitor the pillars of the bridge entering the city of Chalus, and the installation of the tool was carried out in April 2024. After installing the tiltmeters, the instrument cables are directed to the terminal boxes and their readings are done in this place easily.
April 2024
Supply of convergence meters for Ariana Dam and Tunnel Company
Ariana Dam and Tunnel Company purchased a convergence meter from Payab Zamzam Company for one of its projects abroad. The mentioned device was delivered to the relevant company in March 2024.
March 2024
Supply of Vibrating wire Recorder and Vibrating wire Sensors for Dez Dam
The Dez Dam Production and Operation Company purchased some precision instruments in order to monitor the concrete structure of the dam and the rocks around it. These tools include the VW and the corresponding reading loggers, all of which were submitted to the project in March 2024. It has been decided that by purchasing and deploying an automatic data acquisition device and using a wireless transmission system, the collected data will be transferred to the central monitoring room. The installation of the above-mentioned tools will be completed in April 2024.
March 2024
Supply of water level meter and magnetic sedimentation device for Maroon Dam
In order to replace and complete some of the instrumentation of Maroon Dam, the Maroon Dam Production and Operation Company has purchased a water level meter, a magnetic settlement device and a logger for reading vibration (VW) sensors. This set of tools was produced according to the employer’s specifications and delivered to the project in March.
March 2024
Supply of water level meter for Karun 3 dam
The operator of Karun 3 dam procured a water level meter from Payab Zamzam Company to determine the water level in a number of its boreholes and pits. This machine was delivered to the project in February.
February 2024
Supply of Instrumentation for Monitoring Tunnel No. 31 of Tehran-Shomal Freeway
In order to monitor Tunnel No. 31 on the Tehran-Shomal Freeway, General Mechanics Company has ordered a number of 80-ton electric load cells, 3-point and four-point extensometers, along with a comprehensive portable reading device produced by Payab Zamzam Company. Due to the importance of quick installation, the desired tools were produced within 5 days and ready to be delivered to the project.
February 2024
Supply of Electrical load cells for Monitoring Tendons of Excavation Operations
In the continuation of its excavation operations in one of the areas of Tehran in order to monitor the amount of force in its cable tendons, Pars Geometer Company ordered a number of 80-ton load cells to Payab Zamzam Company. These load cells were produced and delivered to the project in February.
February 2024
Post tensioning of the concrete deck of the Great Bridge of the Northern Karaj Freeway
The Great Freeway Bridge of the Northern Bypass of Karaj is being built on the Karaj River and near the Bileghan Bridge. This huge bridge, which will be the second largest bridge in Iran, is supposed to become the symbol of the metropolis of Karaj. This cable bridge, which has a large middle span with a length of 173 meters and two side spans with a length of 97 meters, is located on two tall piers of 70 and 88 meters. After the lifting of the deck construction mold (Shario) by Payab Zamzam Company and the completion of the mold assembly, the deck construction operation by Azaran Company and the bridge post tensioning operation by Payab Zamzam Company and by nearly 20 executive personnel began in January. Post tensioning operations include the installation of steel ducts, prefabricated anchor blocks, the installation of steel strands and applying tension to them, and then grout injection into the ducts is part of the description of the current post tensioning services. The entire construction of the bridge deck is expected to take 14 months.
January 2023
Providing Supplementary Instrumentation for Monitoring Jajrood Water Transfer Tunnel
Following the supply of a number of instruments including pressure cells and concrete strain gauges to Jajrood water transfer tunnel project, in order to continue the investigations, a new series of these instruments were requested and delivered to the project.
January 2023
Monitoring of Rock Cracks by Vibrating Wire Crack meters in Dez Dam
Dez Dam, which is one of the oldest dams in Iran, has recently ordered 14 one-dimensional vibration wire crack meters and related logger from Payab Zamzam Company to monitor some of the cracks in the surrounding rocks and dam body. The sensor cables are routed to the central terminals and gathered into them for ease of reading. The relevant tools are now ready to be installed in the employer’s desired locations.
December 2023
Monitoring one of the tunnels of section 2 of the Tehran-Shomal Freeway
In one of its tunnels under construction in Part 2 of the Tehran-Shomal Freeway, General Mechanics Company has procured 2 convergence meters, 3 extensometers and a reading logger from Payab Zamzam Company. The installation of convergence meter pins and extensometers will be completed by January.
December 2023
Release of Two Cable Crane Cables in Karun 4 Dam
Two long cables called Cable Crane that were used in Karun 4 concrete dam for the concreting stage of the dam body were successfully released by Payab Zamzam Company and deployed on the ground. These long cables, which have a diameter of 97 mm, were stretched with a force of 180 tons and were stretched and released synchronously by two 400-ton jacks. This operation, which was previously carried out by a German company, was successfully carried out this time by the experts of Payab Zamzam Company with a fraction of the previous costs. It is planned that in the next stage, these cables will be reinstalled and stretched by Payab Zamzam in Khersan 3 dam.
December 2023
Supply of Instrumentation for Bird Garden
The Bird Garden, which has been built east of Tehran on Shahid Babaei Highway, has a huge metal net that is located on a large valley and has become a habitat for many birds. This metal grating structure is placed on a network of thick steel cables. The total weight of this grating is conveyed over a number of tall metal columns. In order to monitor the strain in the cables and control the deviation of the relevant columns, 4 vibrating wire strain meters, 4 digital two-axis tilt meters and 1 datalogger were produced and delivered by Payab Zamzam Company. The installation and commissioning of the system will be completed in December.
November 2023
Supply of cable tendons in Cariage Way of Khersan 3 dam
The Cariage Way structure is located in the Khersan Dam in a place that is overlooked by a crushed rock mass with the potential of movement. In order to ensure the stability of this mass and not to damage the Cariage Way structure, it has been decided that 210 cable tendons with a length of 12 meters should be installed in it and stressed. The supply of tendons and their installation and stressing have been entrusted to Payab Zamzam Company.
November 2023
Supply of tilt meter for Monitoring Chalous Bridge
10 digital tilt meters with electronic sensors along with the relevant logger for monitoring the pillars of the bridge entering the city of Chalus were supplied by Payab Zamzam Company. The installation of the tool is about to be carried out, and after installation, the tool cables are directed to the terminal boxes and their readings are done in this place easily.
October 2023
Supply and installation of cable tendons in the Fix Point structure of Khersan 3 dam
Khersan 3 Dam is one of the tallest concrete dams in the country that is under construction. The concreting operation of the body of this dam will be carried out by a cable system called Cable Crane. The cables that carry the concrete carriage are connected to the Fix Point structure on one side and have a movable connection to Cariage Way on the other side of the valley. Fix Point concrete structure is sewn to the mountain with the help of 12 30-meter long tendons consisting of six 0.6-inch steel strands. The supply of tendons and their installation and stressing is being done by Payab Zamzam Company.
October 2023
Shario Mold Lifting Operations in the Great Bridge of the Northern Karaj Freeway
The Great Freeway Bridge of the Northern Bypass of Karaj is being built on the Karaj River and near the Bileghan Bridge. This huge bridge, which will be the second largest bridge in Iran, is supposed to become the symbol of the metropolis of Karaj. This cable bridge, which has a large middle span with a length of 173 meters and two side spans with a length of 97 meters, is located on two tall piers of 70 and 88 meters. These piers have already been built and the deck mold (Shario) is being assembled on them. Heavy lifting is used to lift the floor part of the Shario mold that has a lot of weight. The lifting operation of the Shario floor mold has been entrusted to Payab Zamzam Company. This operation is performed simultaneously by 4 number of 250-ton jacks and 4 numbers of 5 stranded anchorages. The jacks move simultaneously and with the help of a precise two-axis tiltmeter with an accuracy of 0.001 degrees, the mold is lifted in a perfectly aligned manner. The lifting of the first of the 4 molds is being completed, and the whole operation is expected to be completed within 1 month.
July 2023
Cable Crane Cable Release Operation in Karun 4 Dam
The common method in concreting dams is the use of long cables called cable cranes, which are installed between two valleys and concrete baskets travel longitudinally on them. One end of these cables is fixed and the other side is fixed on a movable rail system. Thus, it is possible to pour concrete in different X and Y directions. These cables are generally two and are very thick and strong, under a lot of tension. After the completion of the concrete pouring operation, these cables can be released and used in other projects. The operation of releasing Cable Crane cables in Karun 4 dam and reinstalling it in Khersan 3 dam has been entrusted to Payab Zamzam Company. Preparations have been made for the release of cables and this work will be completed within two weeks.
July 2023
Supply of Instrumentation for Monitoring Tunnels of Part 2 of Tehran-ShomalFreeway
In order to monitor tunnels No. 27 and 31 of the Tehran-ShomalFreeway, which are located in section No. 2 of this route, Day Company has prepared a number of etensile gauges with electric heads and the corresponding reading logger from Payab Zamzam Company. Preparations for digging the relevant pits are underway so that the installation of the mentioned tools will be done soon.
July 2023
Instrumentation of buildings adjacent to Qom metro
Some buildings adjacent to Qom metro have been damaged after excavations. The amount of damage in some buildings has been significant. One of these cases is being monitored by 10 one-dimensional cack meter and 3 two-dimensional tilt meter by Payab Zamzam Company. The operation began in June and is scheduled to continue for some time to monitor the development (or unchange) of the cracks and movements of the building.
July 2023
Supply of 300-meter water level meter
In order to determine the water level in the holes of the Karun 3 dam project, a depth meter with 300 meters of graduated cable was constructed and delivered to the employer (Karun 3 Dam and Hydropower Plant Production and Operation Management Company). Due to the long length of the required cable, an attempt was made to lighten the pulley to make it easier to transport this tool. With the built-in mechanism and modification applied to the structure of the standard pulleys, the weight of the assemble made was limited to 7 kg.
May 2023
Supply of extensometer and portable loggers
Six 3-point extensometers with a length of 10 meters with an electric head were built to monitor one of the tunnels of Day Company located on the Tehran-Shomal Freeway. In order to read these tools, a single-function portable logger has also been provided.
April 2023
Installation of crack meter and tilt meter on the concrete wall at the entrance to the Tehran-Shomal Freeway
The tall concrete wall that is located under the toll gates of the entrance to the Tehran-Shomal Freeway has a crack that attracted the attention of the operator and in order to ensure that it does not move incrementally and progressively, they installed a 3D electric crack meter and a digital 3-axis crack meter. The supply and installation of these tools was done by Payab Zamzam Company, and the necessary logger device for reading the above tools was also delivered to the project employer.
March 2023
Stress Measurement Operations by Flat Jack Method in Angoran Mine
As part of the control of the extraction method in the underground part of the Angoran mine, on-site stress measurement operations were carried out in 3 points of the underground tunnels of this mine. The test method was based on the flat jack method and stress measurement was performed on both the roof of the tunnel and its wall. Also, two three-axis crack meters with vibrating wire sensors were installed. According to the recorded stress values in these points, the technical office department can optimize the maintenance operations in this mine.
March 2023
Providing Instrumentation for Behavior Monitoring of Tunnel 24 in Tehran-Shomal Freeway
Tunnel No. 24 is located in Segment 2 of the Tehran-Shomal Freeway. At this point, where several tunnels pass over each other, monitoring is needed to ensure that the reinforcement system is adequate. Pars Gostar Kian Pad Company has prepared 9 load cells + 9 elongation gauges + a portable logger from Payab Zamzam Company, and now the installed devices are producing data.
February 2023
Restoration of Karun Island Cable Bridge in Ahvaz
The bridge of Karun Island connects the beautiful recreational island of Karun to the city of Ahvaz. The bridge is designed as a combination of metal arches and 12-stranded cables. Unfortunately, during several cases of overloading on this bridge, a number of its cables have been torn and the bridge has been endangered. The contract for repairing the cables and replacing the damaged parts and adjusting the force in all the cables of the bridge was assigned to Payab Zamzam Company. This operation will be carried out within a month, which will be completed in March 2023.
February 2023
Strengthening of the supports of the steel arch bridge of Gelevard
The operation of strengthening the supports of the Gelevard metal arch bridge located in Mazandaran province was entrusted to the Payab Zamzam Company. In this project, the bridge supports including backs, leggings, as well as the foundations are stretched and strengthened using 3 to 8 strand cable tendons with a length of up to 25 meters. Also, the installation of various types of instrumentation in this project will keep these important sections of the bridge under constant supervision. The steep geometry of the valley walls is one of the difficulties of this project.
February 2023
Repair of devices produced by Geokon Company of America
A logger for vibration sensors, as well as an inclinometer and a pile dynamic testing device produced by the American company Geokon, which could not be sent abroad for repair, were repaired and restarted by the experts of Payab ZamzamCompany.
December 2022
Supply and installation of two extensometers in Faizabad lead and zinc mine in Nain
In order to record the movements of the rock around the lead and zinc mining stopes in the city of Nain, two extensometer were installed from the ground surface. Using the information of this tool, it will be possible to optimize the extraction plan and the blast map.
November 2022
Supply of water level meter and magnetic settlement meter for Karkheh Dam
In order to complete the instrumentation used in Karkheh Dam and perform behavioral monitoring routines in this dam, two water level depth detectors and magnetic settlement meters were delivered to the project by Payab Zamzam Company. Due to the limitations in the size of piezometric tubes and the way of reading the settlement meters, special dimensions were ordered for both probes of the device, and the production of these instruments was custom made. The diameter of the water level meter probe was 10 mm and its length was 100 mm. For the case of settlement meter, the diameter of 17 mm and the length of 230 mm were specially produced.
November 2022
Supply of convergence meters and related pins in Rudbar Lorestan Dam
In order to record the movements of its tunnels in Rudbar Lorestan Dam, Triangle Sazeh Energy Company has prepared a convergence meter from Payab Zamzam Company. This tool is currently working and generating data in this project.
October 2022
Supply of anchoring materials and reinforcement of Tunnel 24 on Tehran-Shomal Freeway
Tunnel No. 24 is located in Segment 2 of the Tehran-Shomal Freeway. At this point, where several tunnels pass over each other, it was recognized that additional reinforcements were needed to achieve stability. The supply of cable tendons in this tunnel and the installation, injection and stressing of these tendons were the responsibility of Payab Zamzam Company. In this section, a number of load gauges and elongometers were also installed next to the tendons. With the help of the combination of the installed instrumentation and the tendons used, a lot of confidence has been created for the method of implementation to achieve the stability of the tunnels.
October 2022
Providing Instrumentation for Monitoring Isfahan Metro Station
Subway stations are very large empty spaces that must have a very high degree of reliability due to the high traffic of people in them. In this project, which is defined in the Isfahan metro station, a number of two-axis tilt meters with internal thermometers were used to monitor and control the possible rotation of different parts of the structure. This instrument is mounted on the wall of the station and reports the amount of rotation and deviation from the original position in two orthogonal directions with an accuracy of one thousandth of a degree. Also, a suitable data logger for the reading of the tilt meter has also been delivered to the project.
September 2022
Providing Instrumentation for Monitoring the Excavation System of Qom City
Urban pits are generally dug in high-rise buildings in order to create subsurface floors. In cases where excavation is carried out in the soil, it is very important to ensure the stability of the pit walls. Usually, there are other buildings in the vicinity of urban pits that should not be threatened or damaged during the implementation of the project. Using instrumentation is a reliable way to predict any risk in the shortest possible time. In this excavation project, which uses an anchoring and nailing reinforcement system, the monitoring of the force in the reinforcement system was done by a number of 80-ton load cells. Also, the supply of a single-purpose data logger in this project has been the responsibility of Payab Zamzam Company.
September 2022
Supply of Instrumentation for Tunnels of Segment 1 of Khorramabad – Mamoulan – Poldokhtar Axis
The maintenance system in most intercity tunnels includes concrete lining. A pressure cell is usually used to know the amount of tension in lining. Also, convergence measurement is used to measure the displacement of the tunnel walls. In this project, Payab Zamzam Company has supplied a number of electric pressure cells along with a digital convergence meter and the related data logger. Using these tools, it is possible to ensure the amount of pressures applied from the ground to the lining on a regular basis and that these stresses remain within the permissible limits.
September 2022
Supply of Instrumentation for Monitoring the Foundation of Se-Balutak Bridge
One of the important points in bridge construction is the foundation under the bridge pillars. Since the weight of the bridge structure and the means of transportation on it enter the columns and from there to the foundation through the deck, foundations are one of the sensitive points in bridge construction projects. The purpose of this behavior study is to investigate the stability of the foundation of one of the pillars of the Se-Balutak Bridge, which is located near the lake and the water reservoir. Any risk of foundation movement causes movement and rotation in the bridge pylon, so the probable rotation of the pylon is also monitored by installing a number of tilt meters.
As mentioned, to measure the movement of the foundation and monitor the amount of pressure and water level in the surrounding rocks and the rotation of the pylon, two-axis inclinometer, an electric piezometer, a 40-meter extensometer with 5 anchors and a suitable data logger are used. These tools are supplied to the project by Payab Zamzam Company.
September 2022
Behavior of Tunnel No. 11 of Tehran-Shomal Freeway
Tunnel No. 11, which is located on the route of the Tehran-Shomal Freeway, is a tunnel with a low overhead and on the side of the valley. The blocky rock mass and the lack of overflow, which led to weathering of the rock mass, caused movements and led to some cracks in its concrete coating. Also, a number of ground anchors have been used to strengthen the rock mass and prevent the movement of discontinuities. In this project, a number of 3-axis crack meters and 40 and 25-meter extensometers as well as a number of 150-ton load cells have been used to monitor these movements. Extensometers are installed inside and outside of the tunnel and load cells are placed on the ground anchors outside the tunnel. Crack meters are also installed on the cracks created in the tunnel lining.
September 2022
Behavior of the Sixth Bridge of Tehran-Shomal Freeway
The sixth bridge of ShomalTehran Freeway is perhaps the largest bridge on this route. The bridge system is made of composite steel and concrete, and its deck, which is a hollow box, is reinforced by external steel strands. Bridge monitoring has been done by Payab Zamzam Company in the form of supplying and installing cable strain gauges, deck tilt meters and data acquisition systems.
The purpose of the monitoring is to determine the amount of force change in the external cables of the deck as well as the amount of rotation of the deck and movement in the cracks of the structure. The measurement of all sensors (including new instruments and old instruments) is done through an automatic data collection system. All bridge sensors are automatically read every 2 hours a day for 24 hours a day and the relevant data is stored for future use and analysis. This data is then routed by fiber optic to the employer’s control room.
August 2022
Behavior of Sheet Walls of Tehran-Shomal Freeway
In many parts of the Tehran-Shomal Freeway, the side of the road has been protected by the installation of high concrete walls (known as the sheet pile wall). These walls consist of a number of concrete columns and intermittent concrete sheets, which collectively provide a suitable cover for roadside protection. In order to monitor the performance of these walls, a number of tilt meters are being performed in parts of the route and its readings are being carried out by appropriate loggers. The tilt meters have two sensors to record rotation in two directions and with an accuracy of one thousandth of a degree, and the instrument is equipped with a built-in thermometer to record and correct the effect of temperature.
July 2022
Behavior of Reinforced Soil Wall of Tehran-Shomal Freeway
At kilometer 14700 of the Tehran-Shomal Freeway, a very high wall has been built in front of the village of Sangan. The wall is of the type of stone layer without bonding materials and is built in a staircase shape. Since there are many residential areas and gardens under this wall, the stability and probable movements of this wall have been monitored by a number of tilt meters. The tilt meters have two sensors to record rotation in two directions and with an accuracy of one thousandth of a degree, and the instrument is equipped with a built-in thermometer to record and correct the effect of temperature. Due to the difficulty of accessing the installation site, the installation operation was very sensitive and difficult, and a special mobile platform was designed and built by Payab Zamzam Company to do the work. Currently, all devices are being read and a high reliability factor has been recorded for the wall.
July 2022
Behavior of Sungun Copper Mine
The behavior of one of the high slopes overlooking the Sungun copper mine crusher plant (one of the largest active copper mines in the country) has been done by Payab Zamzam Company. This slope, which has a height of 80 meters, has been built in several steps. The materials of the site are made up of small and highly weathered and fractured stones. The slope reinforcement system is designed to use monobars with a diameter of 40 mm in the form of nails. The installation of 20 load cells on selected monobars is part of the monitoring of this wall. Also, a number of inclinometers are installed in different areas of the slope and its surroundings in parallel with slope monitoring. All instruments are connected to the terminal boxes in the middle steps by cabling and the reading operations are carried out centrally but manually with a portable logger. It is planned that in the next step, the reading system will be automatic and non-manual in order to increase the accuracy of readings and eliminate human errors. Also, due to the cold weather and snowfall in this area, in some seasons of the year, it is not easy to access the place for manual reading, so having an automatic data collection system can be a great help to the project.
November 2021
Behavior of Mirdamad pit in Tehran
Payab Zamzam Company carried out behavior monitoring in the Mirdamad region by supplying rotation tilt meters. Ensuring the stability of the side wall of the surrounding streets is one of the goals of this behavior. In this project, a number of two-axis tilt meters were installed on the building adjacent to the pit and its cable was transferred to a suitable place for reading. The instrument also has a built-in temperature sensor and simultaneous thermal corrections are applied to the data. Also, for added protection, the tools are housed in a suitable protective box. The data collected so far indicate the proper stability of the structure and no destructive movements have been reported so far.
October 2021
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