Steel shotcrete support internal force self-compensation, displacement control system and control method

Abstract

The invention belongs to the building support component technology field including the stress automatic control and monitoring as well as the structural safety, and relates to a steel tube supporting internal force automatic compensating and displacement controlling system. The system comprises an upper system, a PLC control system module and a field executive system. A steel support is arranged on a reinforced concrete diaphragm wall, a hydraulic jack is arranged on the steel support, and real time pressure monitoring values are fed back through a pressure sensor. The steel support and the hydraulic jack form a pre-stressed steel support structure, the hydraulic jack is connected with a hydraulic pump station through an oil circuit, and is connected with the PLC control system module through the pressure sensor, the hydraulic pump station is connected with the PLC control system module, and a PLC controlling device is connected with the upper system. Through auto-control software and a PLC control system, the automatic control to the axial force of the steel support is realized, thereby controlling the displacement and the settlement of the deep excavation supporting structure and the adjacent basic facilities.

Description

technical field [0001] The invention belongs to the structural safety technical field of force automatic control and monitoring technology of building support components, and in particular relates to an automatic compensation and displacement control system for internal force of steel support. Specifically, it uses the "rigid ground connection wall theory" to realize the automatic control and monitoring of the axial force of the steel support through this system to ensure that the axial force of the steel support strictly meets the design requirements and actual engineering needs, and combines the foundation pit safety and health monitoring system in real time Feedback on the safety status of the foundation pit support structure, through the comprehensive judgment of experts, continuously optimize the design plan, and achieve the goal of safe and smooth implementation of the project. Background technique [0002] With the increasing scale of urban construction, urban infrast...

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Problems solved by technology

[0003] At present, the known prestressed steel support construction of deep foundation pit engineering adopts manual loading method, and the prestress loss is generally 20-40%, or even greater

When the deformation of the supporting structure is large and the feedback of the measurement results needs to add the loss of prestress, reinstall the jack and load it, and then lock the steel support at the new position. Timely control of environmental deformation requirements

[0004] At present, when the deep foundation pit project is being constructed close to the subway, the monitoring and analysis of the impact of the surrounding construction on the subway tunnel has been carried out, and the automatic monitoring has only been realized inside the subway tunnel, and the application of information technology is not sufficient

The construction of the foundation pit relies on traditional methods and means, which cannot realize the automatic compensation of the axial force of the support. The loss of the axial force of the steel support is large, and the lateral deformation of the subway is large, which cannot meet the stringent requirements of the deformation and settlement of the subway.

[0005] By searching domestic and foreign related literature, no research methods, research results or products similar to this system have been found

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