回灌技术在基坑工程中的应用研究

Research on application of recharging technique in excavation engineering

研究了潜水抽-注水井(群)耦合作用下浸润线的求解方法,利用势流理论和镜像原理,在假定含水层水平、土层渗透系数各向同性的条件下,推导了完整抽-注水井(群)耦合作用时浸润线的计算公式及非完整抽-注水井(群)耦合作用时浸润线的计算公式,还对潜水单个非完整抽水井及非完整抽-注水井(群)耦合作用时的解析解和数值解作了比较,结果表明两者吻合得较好.同时还给出了该理论用于回灌技术中求解抽水量和注水量的方法,对工程设计有实用价值.

A method for solving the seepage line under the coupled action of pumping-recharging well (group) was developed. On condition that the aquifer was horizontal and the permeability coefficient was isotropic, the analytical formula for determining the seepage line under the coupled action of fully pumping-recharging well (group) and partially pumping-recharging well (group) were derived based on the potential flow theory and the image principle. A comparison between the analytical result and numerical result for a partially penetrating well and a pumping-recharging well (group) showed that the two results were in good agreement. Finally the method for determining the quantity of pumping and recharging was given, which is help for project design.