人工降低基坑水位是基坑工程中的常用技术手段之一,需要合理评价其在地基中引起渗流及附加的变形。采用Visual MODFLOW数值计算软件分析降水条件下武汉某基坑工程的渗流场,并采用分层总和法计算地基变形场。结果表明,随着离基坑的距离增加,基坑外的水头逐渐增大,而地基沉降逐渐减小。增加帷幕深度可以提高降水效果,并有效减小基坑降水引起的沉降。 It is one of the common technical means to reduce the water level of foundation pit manually. It is necessary to reasonably evaluate the seepage and additional deformation caused in the foundation. Visual MODFLOW numerical analysis software is used to analyze the seepage field of a foundation pit project under the condition of precipitation and the stratified sum method is used to calculate the deformation field of foundation. The results show that as the distance from the pit increases, the water head outside the foundation pit increases gradually and the foundation settlement decreases. Increasing the curtain depth can improve the rainfall effect and effectively reduce the settlement caused by the foundation pit dewatering.