复杂线路条件下盾构下穿民房掘进参数优化研究

Research on Tunneling Parameters Optimization for Shield Tunneling Down-traversing Civil Houses under Complex Line Conditions

摘要:

以天津地铁三号线水上北路站～吴家窑站盾构区间左线线路为研究背景，以盾构施工控制技术为研究方向，通过试验段掘进、现场数据监测分析、计算模拟分析、盾构施工参数选取、实际监测数据分析等，研究了在复杂线路条件下（变坡度，小曲线半径等），盾构机掘进的参数优化。以试验段的跟踪监测调整数据为分析依据，着力主要控制参数，对掘进参数的选取采用理论计算结合实际监测的方法，论证参数的可适用性。研究结果表明：采用合理的掘进参数，能有效控制盾构机在复杂线路条件下下穿建筑物时的沉降。

Abstract:

Take the left line of a shield interval construction in Tianjin metro Line 3 as the example and with the shield construction control as the research direction, based on the tunneling in test section, analysis on field data monitoring, analysis on computational simulation, selection of shield construction parameters and analysis on actual monitoring data, the paper makes the research on the parameters optimization of tunneling shield machine under complex line conditions(slope changing and small curve radius). With the track monitoring data of the test section as the analysis basis, focus on the main control parameters, the tunneling parameters are selected by theoretical calculation combined with the actual monitoring to demonstrate the parameter applicability. Research results show that the rational tunneling parameters can effectively control the shield machine sinking during the down-traversing building process in the complex line.