桂林理工大学学报2023，Vol.43Issue(4)：631-638,8.DOI:10.3969/j.issn.1674-9057.2023.04.011
软土地区双侧深基坑开挖对中间地铁隧道变形影响
Analysis on deformation of middle subway tunnel due to excavation of bilateral deep foundation pit in soft soil areas
摘要
Abstract
In order to study the effect of bilateral deep foundation pit excavation on the deformation of the middle subway tunnel,the excavation of a certain open-cut tunnel in Datieguan Station of Hangzhou Metro is carried out as an example,the deformation of the tunnel and supporting structure during the bilateral foundation pit excava-tion are measured,and the triaxial consolidation and drainage shear and unloading-reloading are tested.Most of the parameters of the the hardening soil model with small-strain stiffness(HSS model)are obtained,and the HSS constitutive model is used to simulate the deformation of the tunnel during the excavation,and the results are com-pared with the measured data.The results show that the deformation of the tunnel floor caused by the disturbance of engineering pile construction before the excavation can not be ignored.The deformation of the tunnel floor dur-ing the excavation of the foundation pit is comprehensively affected by the internal strut stiffness on both excava-tions and the lateral resisting stiffness of tunnel structure.The internal strut stiffness on the north excavation is less than that on the south side.The deformation continues to the north side during the excavation,and the total hori-zontal deformation value of the tunnel floor is close to the control value.The HSS constitutive model can better simulate the deformation of diaphragm wall and subway tunnel floor in the excavation stage,and plays a good role in the construction risk assessment.关键词
双侧深基坑/地铁隧道/水平变形/HSS本构模型Key words
bilateral deep foundation pit/subway tunnel/horizontal deformation/HSS constitutive model分类
建筑与水利引用本文复制引用
刘传林..软土地区双侧深基坑开挖对中间地铁隧道变形影响[J].桂林理工大学学报,2023,43(4):631-638,8.基金项目
中铁建设集团有限公司科技研发计划项目(LX20-16b) （LX20-16b）
