Deep well dewatering of soft soil two - layer structure excavation is a kind of economical and effective dewatering method to ensure waterproof in deep excavation . nevertheless its negative impact on is often unavoidable . deep excavation dewatering often leads to the formation of a depressing cone , which may cause the cracking and even the breaking of surrounding buildings and utilities 在軟土地區(qū)二元結(jié)構(gòu)地層,采用深井降低承壓水,是保證深基坑施工作業(yè)的一種經(jīng)濟(jì)有效的方法,但也存在著一定的負(fù)面影響,因?yàn)榻邓畡?shì)必會(huì)形成降水漏斗,而引起基坑周邊地面沉降,可能導(dǎo)致周邊建筑物和公共設(shè)施的開裂或損壞。