The Research Of Waterproof Curtain To The Influence Of Deep Foundation Pit Dewatering

China is currently in a period of rapid economic development,the steady improvement of the level of urbanization makes the city more and more tight construction land.More and more foundation pit engineering arises at the historic moment,among them there is no lack of large deep foundation pit.In the design and construction of deep foundation pit,design of anti-seepage curtain is a must.Effect of waterproof curtain in foundation pit precipitation is slow or prevent groundwater flow to the pit.The ground settlement of foundation pit caused by the decrease of the underground water level is avoided.At the same time to ensure that the foundation pit inside the basic dry,easy to construction.Most of the water cut-off wall design is to obtain the best sealing effect,and the seepage characteristics of few quantitative research of curtain under pit.Based on percolation theory,comparative analysis of the similarity analysis of the basic theory and principle of seepage module in the ANSYS software,on the stability of foundation pit seepage process was simulated by software,through the comparison of a variety of conditions,analysis of waterproof cut-off wall of deep foundation pit with a series of data,to explore the cut-off wall in different depth of insertion conditions of seepage field the influence of foundation pit.Waterproof cut-off wall in different depth,is directly affected by the seepage path,insert impermeable layer in greater depth,the greater the flow path,corresponding to the water head distribution of the seepage field and hydraulic gradient distribution will change,which will affect the basal pressure below the pit safety,the maximum base hydraulic gradient will also affect the safety of the foundation pit,the pit wall by simulating different head value changes and the distribution of maximum hydraulic gradient depth,critical depth to find the wall.And combined with the engineering practice,the research of the existence of the law,and verify the feasibility analysis module in solving seepage problem on ANSYS heat.