Lim Jeehee, Lee Dongseop, Zlotnik Vitaly A, Choi Hangseok
School of Civil Engineering, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47907.
Ground Water. 2014 Mar-Apr;52(2):284-90. doi: 10.1111/gwat.12033. Epub 2013 Feb 26.
An analysis method for slug tests performed in a partially penetrating well within a vertical cutoff wall is presented. A steady-state shape factor for evaluating hydraulic conductivity of the material within the wall was derived by applying the method of images to the previously developed analytical solution of Zlotnik et al. (2010) for an infinite aquifer. Two distinct boundary conditions were considered: constant-head boundary for the case of direct contact between the wall and the aquifer, and no-flux boundary representing an impermeable filter cake on the sides of the wall. The constant-head and no-flux boundary conditions yield significantly higher and lower shape factors, respectively, than those for the infinite aquifer. Consequently the conventional line-fitting method for slug test analysis would yield an inaccurate estimate of the hydraulic conductivity of a vertical cutoff wall.
本文提出了一种在垂直防渗墙内部分穿透井中进行的井柱试验分析方法。通过将镜像法应用于Zlotnik等人（2010年）先前为无限含水层开发的解析解，推导出了用于评估墙内材料水力传导率的稳态形状因子。考虑了两种不同的边界条件：墙与含水层直接接触情况下的定水头边界，以及代表墙侧面不透水滤饼的无流量边界。与无限含水层相比，定水头和无流量边界条件分别产生明显更高和更低的形状因子。因此，传统的用于井柱试验分析的线性拟合方法会对垂直防渗墙的水力传导率产生不准确的估计。
