Disturbance Control of Deep Excavation in Soft Soil Based on Displacement and Axial Force
Aiming at the uncertainty of final displacement due to construction disturbance,and its environmental risk in hydraulic servo feedback control of pressure control of steel bracing system in foundation pit engineering of soft soil layer,an intelligent control method of hydraulic servo for steel bracing,with disturbance displacement control as the core and integrated optimization of displacement and bracing axis force,is established.Based on the allowable displacement constraint,an integrated optimized intelligent control mode of linear displacement variation and support force is proposed,and the corresponding real-time pressure regulation technology for the whole construction process is established.A feedback system based on high-precision laser ranging and hydraulic monitoring synchronization is constructed,and the random data error processing method of shape function is adopted to effectively prevent the feedback control errors and risks caused by random errors.The result shows that its reliability and applicability are verified by model test.The displacement control effect is remarkable through the demonstration application of Shanghai World Expo Channel Project.
integrated optimization of displacement and bracing forcelinear displacement control modesynergistic pressure regulationmicro-disturbance control
NETL
NSTL
万方数据
维普
