中文摘要：

以广州地铁四号线仑大盾构区间为工程背景,通过管片向地层传递的约束反力与地层原始地应力的差值来反映盾尾注浆效果,并采用二维有限元计算模型来模拟盾构盾尾注浆效果对地表沉降的影响,从而实现盾构施工地表沉降的理论预测.数值模拟表明,注浆效果对限制地表沉降作用明显.现场监测同样证实,不同注浆效果将引起不同的地表沉降,且随着注浆效果的提高地表沉降将随之减小.进而验证了数值模拟的合理可行性.

英文摘要：

The ground deformation caused by construction is mainly due to the excavated surface movement of the soil that shields the end to squeeze into the gap.In order to reduce the surface distortion which the shield construction causes,reduces the soil body because to push in the shield tail gap to create the surface the oversized subsidence,usually through a certain pressure to shield tail and lining work crevice prompt pressure cementing class mortar.Therefore,under certain conditions,the effect of construction of grouting and surface deformation is closely related,and the thesis took Guangzhou Metro Line 4 on the LUN DA interval Shield Construction for the background,and chose the numerical analysis method to study the shield construction shield tail grouting of the impact of different soil warehouse surface subsidence caused by pressure changes in the law.The examples of works on-site test and the results show both the rationality and feasibility.