Analysis Of The Influence Of Slope Underground Structure On The Surrounding Groundwater Environment

With the acceleration of urbanization,the pressure of population,resources,environment,economy and society is increasing.The development and utilization of slope underground space is an important way to alleviate various urban problems and to promote the sustainable development of urban economy and society.The use of slope underground space and the development will inevitably cause the problem of groundwater.For example,both the water-blocking structure and the pressure-reducing anti-floating structure will change and disturb the groundwater environment to varying degrees,which is manifested as the increase or decrease of groundwater level,the increase or decrease of groundwater flow,and then changing the soil structure and its engineering properties,endangering the safety of surrounding buildings and underground pipelines,worsening the underground biochemical environment or affect the growth of surface vegetation,etc.The core content of this paper is to study the impact of the slope underground structure on the surrounding groundwater environment.Based on this core content,the following four aspects of work are carried out:(1)Analyzing the impact of a single underground structure on the groundwater environment of the slope.GeoStudio software was used to analyze various types of underground structures and their laws of impacts on groundwater environment under different working conditions,and several factors affecting slope seepage were proactively discussed.In addition,beneficial countermeasures were put forward to reduce the impacts of individual underground structures on groundwater environment.(2)Analyzing the impact of comprehensive development of underground space on the groundwater environment of sloping land.GeoStudio software was used to analyze the two types of underground space development modes and the rules of their impacts on the groundwater environment under different working conditions,and the impacts of the upstream and downstream underground space development sequence and the width of the void were discussed.Countermeasures were proposed to reduce the impacts of the comprehensive underground space development on the groundwater environment.(3)Making and improving a set of two-dimensional sand channel model for percolation test,focusing on the study of the upper and lower percolation field variation rules with or without flow around the end of the structure,different head differences and different embedding depths.(4)Analyzing the influence of circumferential seepage on the surrounding groundwater environment.Comparing the two-dimensional section seepage calculation software GeoStudio with the multi-layer seepage program to verify that the multi-layer seepage program can be used for the influence analysis of three-dimensional seepage.The influence of three-dimensional seepage on the groundwater environment is analyzed by using the multi-layer seepage calculation program,and the degree of the influence of three-dimensional seepage on the groundwater environment is obtained.