一种层状岩体压水试验成果计算分析渗透性的新方法  

A new method of hydraulic conductivity calculating and analysis by water pressure test in layered rock

作　　者：王新峰[1] 梁杏[2] 孙蓉琳[2] 杨静熙[3] 郑汉淮[3] 

机构地区：[1]中国地质大学研究生院,武汉430074 [2]中国地质大学生物地质与环境地质教育部重点实验室,武汉430074 [3]中国水电顾问集团成都勘测设计研究院,成都610072

出　　处：《水文地质工程地质》2011年第1期46-52,共7页Hydrogeology & Engineering Geology

基　　金：中国地质调查局计划项目专题(地下水系统理论与应用指南;12120733908)

摘　　要：通过对西南某坝区压水试验数据的计算分析,提出了基于中值理论和几何均值的埋深域渗透系数取值区间法。首先将压水试验资料采用巴布什金经验公式和达西公式把吕荣值转换成渗透系数,并分析各分类项的数据分布类型。在分析研究区层状裂隙岩体岩性特征及其组合关系的基础上,运用均值和中值理论从宏观上分析研究区垂向和平面渗透特征,得出均值和中值分析的侧重点;再用渗透系数与埋深散点图绘制小值和大值取值趋势线,继而进行曲线拟合,并完成数理可靠性和物理含义的检验;运用通过检验的方程计算每米埋深的渗透系数,而后在划分的各埋深域内,依据小值和大值取值数量的差别,分别求取其几何平均值,最终得到各埋深域渗透系数取值区间。Based on computational analysis on water pressure test data in a dam area located in the southwest of China,region taking value method of hydraulic conductivity at buried depth domain based on median theory and geometry mean is proposed.Firstly,Lugeon（Lu） is converted into hydraulic conductivity by В.Д.Бабщкин and Darcy formula,and the data distributional model of each classification is analyzed.Basing on the lithologic characteristic and composite relation of the layered fracture rock in the study area,the vertical and horizontal distribution of permeability is analyzed by using mean value and median theory and then the emphasis points of mean and median are determined.The trendline of minimum and maximum value of hydraulic conductivity with buried depth is obtained based on the scatterplot chart,then the curve is fitted,and the test of mathematical reliability and physical meaning is completed.According to the fitting equation,the hudraulic conductivity per meter is calculated and the geometry mean in each divided buried depth domain is obtained based on the difference between the number of minimum and maximum value.Finally,the taking value region of hydraulic conductivity in each buried depth domain is obtained.

关 键 词：压水试验 层状岩体 中值 均值 渗透系数 数据分布类型 

分 类 号：TU45[建筑科学—岩土工程] TV22[建筑科学—土工工程]