基于稳定流抽水试验确定水文地质参数的方法对比

Based on the steady flow pumping test method analysis of hydrogeological parameters

在许多工程中,如深基坑工程、水库大坝的建设、垃圾填埋场的建设、煤矿水文地质勘探及水源地水文地质勘察中,水文地质参数的取得都是非常重要的。水文地质参数的取得方法有多种,我们常用的就有抽水试验、注水试验和渗水试验。本文是深基坑工程,地下水位埋藏较浅,为了取得较为准确的水文地质参数,采取了现场抽水试验的方法,抽水试验的方法又有好多种,本文采用的是一个孔抽水(三次降深)带两个观测孔的稳定流抽水试验,在考虑了井损的情况下,采用了三种方法计算水文地质参数,且对结果进行了对比分析。计算结果表明,不同的降深对取得水文地质参数的影响不大;只利用观测孔的数据计算出的水文地质参数更接近于真实值。

In many projects,such as deep foundation pit engineering,reservoir dam construction,landfill construction,coal mine hydrogeological exploration and water source hydrogeological investigation,the acquisition of hydrogeological parameters is very important.There are a number of methods for obtaining hydrogeological parameters.We have a lot of pumping tests,water injection tests and water seepage tests.This paper is a deep foundation pit project,the groundwater level is shallow,in order to obtain more accurate hydrogeological parameters,take the method of on-site pumping test,pumping test method there are many,this paper is a hole pumping(three times The steady flow pumping test with two observation holes was carried out.Three methods were used to calculate the hydrogeological parameters,and the results were compared and analyzed.The results show that different depths have little effect on the acquisition of hydrogeological parameters.Only the hydrogeological parameters calculated from the observation hole data are closer to the real value.