The Influence Analysis Of Ground Surface Induced By Dewatering In Foundation Pit

With the rapid development of urban construction, dewatering in foundation pit is an important step of deep foundation pit in the construction process, and also is the key to ensuring foundation pot draw safety construction. The impact of precipitation leading to the surface subsidence around, which has been caused widespread attention by the industry, but there is still lack of more precise calculation for the moment. At present, the engineering foundation delamination summation-method calculation used calculation around the surface subsidence value often large difference to data of engineering precipitation. Based on the measured data of the settlement of settlement prediction method than the traditional method forecast more practical. This paper compares the settlement based on the measured data of commonly used method for predicting method ,a triangle, index method and parabolic method.this area on the engineering example after subsidence prediction precipitation calculated, and the engineering measurement data comparison analysis. Analysis found that, triangle method and engineering monitoring data for this region is high quite close to water level mucky soil, selection of triangle method for forecasting result is more applicability.