直线隔水边界附近抽水试验求参的三点公式法  

Application of three-point formula method in parameters calculation in the pumping test near straight impermeable boundary

作　　者：滕凯 

机构地区：[1]齐齐哈尔市水务局,黑龙江齐齐哈尔161006

出　　处：《工程勘察》2016年第10期32-37,共6页Geotechnical Investigation & Surveying

基　　金：齐齐哈尔市科技攻关项目(NYGG201301)

摘　　要：直线隔水边界非稳定流条件下水文地质参数求解为涉及3个(已知隔水边界方向,未知位置)或4个(隔水边界方向及位置均未知)未知数的超越方程,常规的解析法无法直接获解。现有的特定标准曲线比对法、图解拐点法、简化算法、非线性最小二乘法及二元线性回归法或是依赖图表、计算过程繁复,或是应用受限、计算误差较大,不便于实际工程应用。本文采用优化拟合方法,在工程适应参数范围内,用较为简单的函数实现了对泰斯非稳定流井函数的替代,并利用水位降深比值关系经整理获得了可直接完成参数求解的简化解析式,计算过程简捷,便于实际工程应用。The hydrogeological parameters of non-steady flow under straight impermeable boundary are unable to solve by conventional analytical analysis because of the transcendental equation involving three unknowns or four unknowns. The existing methods,such as specific standard curve comparison method,graphical inflection point method,simplified algorithm,nonlinear least square method and binary linear regression method,are not convenient to use in practice for that the method is dependent on graphs,or the calculation process is complicated,or the application is limited,or the calculation error is great. The optimization fitting method which is a simplified analysis method to calculate the parameters by replacing the Theis unsteady flow function by a relatively simple function,and using the water level-drawdown ratio.The calculation process is simple and easy to use in practice.

关 键 词：直线隔水边界 水位降深比值 水文地质参数 优化拟合 简化计算 

分 类 号：P641.2[天文地球—地质矿产勘探]