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

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.