The Analysis Of Calculating Ways Of The Deep Foundation Pit With Seepage Under The Influence Of The Micro-arteasian

Foundation engineering is a very practical geotechnical engineering problem. It is a complicated problem, because it not only contains problems on soil body, but also on groundwater. Therefore it is very important in foundation engineering designing that how groundwater do in the foundation engineering is fully known in the problem。The calculation and analysis of water and earth pressure are key points in foundation engineering designing. if you want to choose suitable supporting pit or correlative parameters about structures, you should make sure that you get the appropriate water and earth pressure. When groundwater is taken into account,the distribution of lateral pressure on the supporting pit are different because of the effect of seepage. I have analyzed the calculating ways of estimating water and earth pressures separately and estimating water and earth pressures together with FEM. When water and earth pressures are calculated separately,seepage is considered especially. Through comparing the results, I get the difference in the distortion of the supporting pit, basal heave and the settlement induced by foundation excavation.In some artesian area ,how to control bottom piping in the foundation pit engineering becomes a common problem, especially in deep foundation engineering. I simulated the bottom piping caused by high artesian head with FEM. After dewatering, the bottom piping is controlled effectually. In this article,the author compared the effects of dewatering inside the foundation with dewatering outside the foundation.The result indicates that the stress and the distortion of the supporting pit are different when seepage is considered. It expresses the seepage do damage to the stability of the foundation pit. It can be obtained that it is feasible to dewater outside the foundation in Tianjin through the result of the pumping test and the FEM calculation。...