上软下硬地层盾构斜穿建筑群施工控制及加固研究

Research on construction control and reinforcement of shield tunneling under-passing the building in upper-soft and lower-hard ground

为研究上软下硬地层中盾构斜穿建筑群的地表的稳定性,以深圳地铁14号线四坳区间为依托,建立了不同加固深度工况下扩大基础建筑群加固模型,研究了盾构在穿越不同加固深度下的扩大基础建筑群地表变形规律。为了研究扩大基础建筑物合理的加固深度,利用数值分析模型,分别对不同加固深度的模型进行研究,结合现场地表沉降监测数据,得出合理的7m加固深度,为盾构穿越扩大基础建筑物工程提供施工建议。

In order to study the stability of the ground surface where the shield passes through the buildings obliquely in the upper soft and lower hard stratum,Taking the si'ao section of Shenzhen metro line 14 as the research object,The reinforcement model of expanded foundation building group under different reinforcement depth is established,This paper studies the ground deformation law of expanded foundation buildings under different reinforcement depth.In order to study and expand the reasonable reinforcement depth of foundation buildings,The numerical analysis model is used to study the models with different reinforcement depth,Combined with the monitoring data of surface subsidence on site,The reasonable reinforcement depth of 7m is obtained,This paper provides construction suggestions for shield tunneling through expanded foundation buildings.