Monitoring and Analysis of the Construction of the Intermediate Air Shaft between Wanhua Station and Dengzhou Station of Foshan Metro Line 2
Based on the monitoring items such as horizontal displacement of the wall,ground subsidence and supporting axial force,this paper analyzes the construction monitoring data of the intermediate air shaft in the interval between Wanhua Station and Dengzhou Station of Foshan Metro Line 2.The results show that during the excavation of the foundation pit,the maximum value of the horizontal cumulative displacement of the wall increases continuously,and the position moves down continuously.Finally,it tends to be stable near 0.6 H(H is the depth of the foundation pit).The maximum cumulative land subsidence corresponds to 20 m away from the pit edge,which is about 0.57 H;the support axial force of the third layer reaches the maximum value when the fifth layer is excavated,and the ground subsidence is also large at this time.We should focus on the nodes with large changes in the support axial force before and after excavation.
subway sectionmiddle air shafthorizontal displacement of the wallland subsidencesupporting axial force
NETL
NSTL
万方数据
