钻孔抽水试验水位降深计算公式推导及其应用

陈含; 张冰冰; 邓刚; 张延亿; 叶建炳; 路威

doi:10.13928/j.cnki.wrahe.2025.S1.065

水利水电技术（中英文） ›› 2025, Vol. 56 ›› Issue (S1) : 422 -427. DOI: 10.13928/j.cnki.wrahe.2025.S1.065

水力学

钻孔抽水试验水位降深计算公式推导及其应用

陈含 ¹^,² ,
张冰冰 ³ ,
邓刚 ¹^,² ,
张延亿 ¹^,² ,
叶建炳 ³ ,
路威 ¹^,²

作者信息 +

Derivation and application of calculation formula for drawdown of pumping test in borehole

Han CHEN ¹^,² ,
Bingbing ZHANG ³ ,
Gang DENG ¹^,² ,
Yanyi ZHANG ¹^,² ,
Jianbing YE ³ ,
Wei LU ¹^,²

Author information +

文章历史 +

PDF (4443K)

摘要

水利水电工程基坑降水需要开展钻孔抽水试验。在某深大基坑工程的倒虹吸选取试验场地布置钻孔，开展了单孔抽水、多孔观测试验以及双孔抽水、多孔观测试验，根据试验结果计算得到了地层渗透系数。根据单孔抽水试验的各孔水位降深，推导得到了对数函数形式的水位降深计算公式，利用该公式可计算单孔抽水影响范围内任意位置的水位降深。结合卡巴拉诺维奇公式，推导得到了单孔抽水试验的抽水孔涌水量计算公式，且发现计算值与实际值较为接近，表明了公式的有效性。根据双孔抽水试验的各孔水位降深，推导得到了二次函数形式的双孔抽水试验两抽水孔之间水位降深计算公式，利用该公式可用来确定基坑在双孔抽水时允许的最小水位降深。各计算公式的应用可为基坑降水方案设计提供依据。

Abstract

Pumping test in borehole should be conducted before dewatering of foundation excavation of water resources and hydropower engineering. Several wells were arranged at an inverted siphon of a deep and large foundation pit. Single well pumping test and double wells pumping test were conducted and permeability coefficients were calculated. Calculation formula of drawdown in the form of a logarithmic function was derived according to drawdown of single well pumping test. Water yield calculation formula of single well pumping test was derived according to Skabaranovic formula. The calculated value is relatively close to the actual value, which indicates the effectiveness of both formulas. Calculation formula of drawdown between both pumping wells in the form of a quadratic function was derived according to drawdown of single well pumping test, which can be used to determine the minimum drawdown during double wells pumping of foundation pit. The application of all calculation formulas can be the basis for the design of dewatering scheme of foundation pit.