Big Soft Soil Slope And Small Radius Curve Tunnel Shield Continuous Through Complex Construction Technology Research

Based on the shield construction of Tianjin metro line 3 ShuiShangBeiLu station to TianTa station,this paper studies the construction technology of large slope and small radius shield advancing construction technology,and the shield parameters selection construction technology when the attitude control technology,big slope and small radius intersection.The interval design radius is small and the slope is relatively large for the propulsion parameters,and the construction difficulty is large,so the theoretical model of various slope and curve radius need to be calculated in advance,Through the model calculation of the relative lines of the shield,the calculation of the calculation thrust size and azimuth is the center conclusion of the large slope and small radius curve segment shield operation and deviation,at the same time,this paper analyzes the method of setting deviation curve and deviation calculation.Using ABAQUS finite element program,numerical simulation and finite element analysis are used to analyze the influence of 3d numerical and surface movement and deformation of ground deformation caused by shield tunneling on river bed ~ floodplain.This paper summarizes the laws of longitudinal and transverse deformation of the ground surface and the deformation of the building under the formation,and the shield parameters selection is obtained when the intersection of large slope and small radius is continuously crossing the building,so as to provide technical support for safety and smooth passing through the building.Combined with monitoring data,the paper analyzes the ground settlement and the settlement of the building,demonstrates the feasibility of the construction technology in the construction process.The construction methods and techniques of passing through the buildings are summarized and summarized.