NDRC 132 KV Electrical Cable
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The project work comprised installation of electrical cables underneath existing King Salman Bin Abdulaziz Al Saud Street and tram lines by Horizontal Directional Drilling (HDD) for the establishment of SEYAHIST - MCLB 132 kV Circuit, in accordance with the requirements of the Authorities.
The cable installation works were carried out using the directional drilling technique with launching and receiving shafts at both ends. The maximum depth of gradient tunneling was about 6.5 m below ground level. The tunnel was at a depth of 6.5 m below tram line and at depths of 3 m and 2 m below the existing roads.
As the HDD tunnel crossed under existing busy road and tram lines, instrumentation was planned for safety monitoring of infrastructure, as well as for the risk management of construction works, even though the shafts were excavated only up to 2.5 m depths.
Encardio-rite’s sister concern Encardio-rite Geosystems LLC in UAE was instructed by the Road and Transport Authority (RTA-Owner of Road and Tram) and Emirates Electrical Engineering L.L.C to provide instrumentation and monitoring solution during NDRC to assess the impact on existing infrastructure.
Scope of works included:
Instrument used for surface/sub-surface monitoring for Road and Tram safety included:
The NDRC/HDD works started after the installation of the above instruments and recording their base readings. Installation and monitoring of the above-mentioned instruments were executed successfully by experienced and proficient I&M team of Encardio-rite. The real-time data from the vibration sensor was continuously accessible to the consultant/contractor at their desk, during NDRC works. Monitoring reports for the manual data was also provided to the contractor daily.
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