Numerical Simulation Of Land Subsidence And Compression Characteristics Of Water Loss Under Groundwater Exploitation

In recent years,due to the development of economy and the increase of population in China,the phenomenon of large scale subsidence caused by exploitation of groundwater resources has become an unavoidable problem in geotechnical engineering.In this paper,based on the background of Dezhou,the method of combining theoretical analysis and numerical research is used to study the characteristics of water loss compression of different aquifers in the process of groundwater exploitation.Considering the theory of groundwater dynamics and hydrological geology,groundwater dynamics and soil mechanics,in different periods in the study area of mining groundwater numerical simulation and sensitivity analysis of random parameters based on Monte Carlo method and the parameters affecting the ground subsidence.This paper studies the problem of ground subsidence caused by the exploitation of deep groundwater,and puts forward the solution for the settlement of the settlement of Dezhou,and reduces the economic loss caused by the settlement.The main contents of this study are as follows:1.Study and analyze the randomness and sensitivity of geological parametersOverview of research on regional German city based on the introduction of Monte Carlo stochastic theory and sensitivity analysis theory to analyze the important parameters which affect the ground subsidence,sensitivity analysis and important parameters,the different parameters on the degree of influence of ground subsidence and the parameter sensitivity of the same sort,extraction of groundwater resources and reduce settlement the amount is important.2.The analysis of groundwater flow fieldIt is an important basic work to grasp the dynamic change of the flow field in the study area.On the basis of fully understanding the general situation of Geology and hydrogeology,to determine the groundwater recharge,runoff and discharge system conditions.The different periods of study of regional groundwater flow field distribution law laid the foundation for the calculation of land subsidence.3.To establish a three-dimensional flow solid coupling numerical model of regional settlementThe hydraulic characteristics in accordance with the main groundwater aquifer layer,based on the finite element theory to establish a 3D settlement numerical model,flow rate and water head variation simulation of groundwater aquifer in the mining process,and then draw the settlement to exploitation of underground water.The city of Dezhou deep groundwater mining model based on the characteristics analysis of different aquifers,in the analysis of groundwater exploitation in the analysis of settlement data analysis layer by layer aquifer compression characteristics,then obtains the variation characteristics of aquifer.According to the simulation results of land subsidence and the analysis of the important influence factors of ground subsidence,the author puts forward some reasonable suggestions and suggestions on the groundwater exploitation in the study area.