大坡度并小半径曲线盾构连续穿越建筑群沉降施工控制

Control on the Settlement Caused by Continuous Crossing under Building Group with Large Slope and Small Radius Curve Shield

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施工为背景，针对盾构施工区间遇到的大坡度并小半径曲线且连续穿越建（构）筑群盾构施工的综合难题，利用施工过程中积累的各种数据，采用归纳总结分析和数理统计的方法，分析了地面建筑物沉降与地质、推力、注浆、纠偏等参数的关系，得出了影响建筑物沉降的因素主要为曲线和纠偏时的超挖、推进速度、注浆参数及注浆方法，总结了控制地面建筑物沉降的管理与技术措施。

Abstract:

Take the left line of a shield interval construction in Tianjin metro Line 3 as the example, according to the comprehensive problem of large slope and small radius curve shield construction with continuous crossing building and structure group, based on a variety of data accumulated in the process of construction, the analysis is made on the relationship with ground subsidence and geological, thrust, grouting and deflection correction parameters by summery and mathematical statistics methods. The main factors affecting building settlement are obtained to be the curve and the over excavation, shield tunneling speed, grouting parameters and grouting method; the management and technical measures of control on building settlement are summed up.