摘要
水文地质参数对于地铁抗浮设计水位的确定,工程建设安全及安全运行等具有重要意义,野外抽水试验是确定水文地质参数的主要方法。本文以"长春市地铁一号线"南湖大路站抽水试验资料为依托,采用传统的稳定流公式法、非稳定流的直线图解法、Theis公式法等计算,并采用全程曲线拟合法进行计算,结合实际水文地质条件,多种方法对比分析,确定该地块渗透系数为45 m/d、导水系数13.50 m2/d及贮水系数为0.000 3。本次试验进一步验证了全程曲线拟合法在承压水含水层中的适应性,提出了井管回水的附加水位对抽水试验参数计算的影响。
Hydrogeological parameter is very important to study anti-floating design water level for metro, safety of engineering construction and safe operation. The field pumping test is the main method for determining hydrogeological parameters. According to pumping test at Nanhu road station of subway line No.1 in Changchun City, the traditional formula method of steady flow, liner graphic method and Theis formula method are adopted to calculate hydrogeological parameters, which are counted by whole curve matching method. Combined with actual hydrogeological conditions and contrast analysis on varieties of methods ,it is certain that in this area the permeability coefficient is 45 m/d, hydraulic conductivity coefficient is 13.5 m/d, storage coefficient is 0.00 03 in the geological unit. The paper further verified adaptability of the whole curve fitting in artesian aquifer. At the same time, the article presents influence of tube backwater on parameter calculation.
出处
《地下空间与工程学报》
CSCD
北大核心
2015年第2期306-309,357,共5页
Chinese Journal of Underground Space and Engineering
基金
吉林省科技攻关项目(20080543
20100452)
教育部潜在油气资源项目(20100331-OSR01-7)
水利部公益性项目(200901037)
关键词
抽水试验
全程曲线拟合法
水文地质参数
井管回水
pumping test
whole curve matching method
hydrogeological parameter
tube backwater
