深基坑降水引起地表沉陷规律研究

hese years,tall buildings and under-ground-space are blooming and lots of foundation pits arise.But foundation pit dewatering will inevitably result in the ground around it settle which will destroy the under-ground pipes even the buildings around.Therefore,the analysis of settlement induced by dewatering is significant.Because the ground settlement is the result of the soil effective-stress increase caused by dewatering ,the paper analyses the changes of soil effective stress before and after dewatering and deduces the formula of the change of effective-stress in the same soil.On the basis of the analysis of soil effective stress, summarization of settlement induced by dewatering is expounded in this paper.The calculation method of dewatering and settlement are used systematically with examples.Carry out the numerical modeling method, from the curves we can get the law of the settlement.The curve looks like a funnel,the settlement near the pit is considerable and the settlement far from it is small,the foremost influcencing factors are analyzed also.