Analysis Of Land Subsidence Caused By Dewatering Of A Project In Guangzhou

With the rapid development of urban construction and the rapid growth of population,urban space resources are becoming more and more tense and traffic congestion has caused inconvenience in the internal traffic and life of the city.For the contradiction of this demand,currently in China,in order to increase the utilization rate of urban land,high-rise buildings and deep underground engineering have gradually become the mainstream,ringing with it a narrow construction site,which requires stability and displacement control of the foundation pit.Extremely high,the control requirements for the pit dewatering are particularly stringent.Based on the actual engineering of a project in Panyu,Guangzhou,this paper collects data,analyzes and analyzes the engineering profile,engineering geological conditions and surrounding environment of a project foundation pit in Panyu,Guangzhou.The main mechanism of the bottom subsidence caused by the foundation pit precipitation is elaborated,and the foundation pit used in this project is combined.Excavation features excavation characteristics,in the analysis simultaneously consider the effect of the effective stress in the soil,the Taishaji consolidation theory and Biot consolidation theory are discussed in detail,based on this,based on the project The characteristics of the soil,the establishment of the flow-consolidation coupled form of the control equation.The force of the diaphragm wall is analyzed by the stress,strain,and horizontal displacement changes in the foundation pit soil during precipitation.The pressure and shear force at the contact surface between the wall body and the soil are consistent with the depth of precipitation.The increase gradually increases,but the impact on the supporting structure is minimal,and it does not cause structural damage.The settlement of soil around the foundation pit caused by precipitation was analyzed.After the analysis,it was found that there was a certain relationship between the settlement of the soil around the foundation pit and the distance from the measuring point to the foundation pit,which was generally in line with the actual situation.The engineering simulation analysis based on ABAQUS can provide a certain reference for the construction process of the actual project,and can provide a certain guiding significance for the settlement monitoring in the actual construction process.