Analysis of Deformation and Stability of Adjacent Buildings Caused by Excavation of Narrow and Long Deep Foundation Pit in Soft Stratum:Taking Yushi Station of Chengdu Line 30 as an Example
The construction of deep foundation pit engineering will have a certain degree of influence on the surrounding buildings.In order to analyze the structural deformation of deep foundation pit and the deformation law of adjacent buildings in the process of deep foundation pit excavation more deeply and accurately,relying on the narrow and long deep foundation pit project of Yushi Station of Chengdu Line 30,the influence of foundation pit excavation on its own structure and surrounding environment was systematically studied by means of theoretical analysis,numerical simulation and on-site whole process monitoring.The results show that the deep foundation pit excavation of adjacent buildings needs to improve the deformation control standard to reduce the impact on surrounding buildings during construction.On the one hand,the side grouting reinforcement of the building reduces the settlement of the building during the construction period,on the other hand,it also reduces the lateral displacement of the foundation pit retaining structure and the surrounding surface settlement.The monitoring results of the whole process of building settlement show that the deformation of the building shows a trend of rising first and then falling,which is closely related to the early grouting uplift and the late failure to follow up the grouting in time.The above research results can provide reference for similar projects.
deep foundation pit engineeringbuildingsdeformation controlnumerical simulationgrouting reinforcement
NETL
NSTL
万方数据
