中文摘要：

在盾构隧道施工中,临近隧道部分土体因应力扰动产生变形,土体变形大小与注浆参数密切相关。为分析盾构施工对临近土层强度破坏和变形的影响,根据土体的强度破坏准则,研究了注浆压力的合理取值范围,并从施工安全的角度提出了最优注浆压力的确定方法;然后,采用镜像法分析了注浆量和地表沉降的关系,并通过和工程现场实测数据的对比分析,得出地表位移和注浆量基本呈线性关系这一结论。在此基础上,提出了以控制沉降为目标来确定最佳注浆量的一种简化计算方法。

英文摘要：

During shield tunneling,the soil deformation around tunnel appears because of stress disturbance,the value of soil deformation is closely related to the grouting parameter. To analyze the influence of shield tunneling on the soil strength and deformation around the tunnel,the reasonable range of the grouting pressure was investigated based on the criteria of strength failure for soils,and the method determining the optimal grouting pressure was proposed from the aspect of the construction safety. Afterwards,the relationship between the grouting amount and the ground surface settlement was analyzed by virtual image technique,by comparing with the field observational data,the conclusion was drawn that the linearly relationship existed between the grouting amount and the ground surface settlement. On this basis,a simplified calculating method determining the optimal grouting amount was proposed with the objective of controlling the settlement.