Abstract:The steel support servo system can effectively control the foundation pit deformation and protect the surrounding structures. However, in the engineering practices, the oil circuit, power supply line and signal line of the original servo steel support system will cause installation difficulties as the depth of the foundation pit increases and the concrete purlins are set up, which will make the foundation pit be exposed without support for a relatively long time, and affect the application effect of the servo support. Additionally, the background of the pumping station on the ground can also affect the emergency passage of the foundation pit. The new servo steel support integrates the oil pump into the servo end, requiring only a single control bus for both power supply and signal transmission, which effectively resolves the above challenges. The new servo steel support and the traditional servo steel support are applied in North Yanggao Road Station of Shanghai Metro Line 21. By comparing the application effects, the reliability and advancement of the new servo support are verified, and the improvement ideas are proposed.
