土层参数及盾构施工参数对地表变形的影响分析

Study on Influence of Soil and Shield Construction Parameters on Ground Deformation

盾构使用不同的施工参数或在不同的土层中掘进时,所引起的地表变形一般是不同的。这是因为不同的施工参数对周围地层的扰动程度有所差异,不同的土层有着不同的物理力学性质。为此以上海地铁多个盾构隧道区间标段为背景,通过大量的地质资料调研和实测数据整理,分析了施工过程中土层参数与地面沉降之间的关系和盾构主要施工参数对于地面沉降的影响。

The ground deformation, which is caused by different parameters used in shield construction and tunneling carried out in different soil layers, is not the same generally. This is because the disturbance extent of the different construction parameters against the surrounding strata is not the same, and different soil layers have different physical and mechanical properties. Therefore, taking several sections of the shield tunnel of Shanghai Metro as the background, with a large amount compilation of the measured data, the relation between the of investigation on the geological materials and soil parameter and the surface subsidence during the construction, and the influence of the main parameter of shield construction on the surface subsidence, were analyzed.