地下水封洞库围岩质量的空间变异性分析与三维表征  

Analysis and Three-Dimensional Display of Spatial Variability of Surrounding Rock Quality in Underground Water-Sealed Caverns

作　　者：杨凯[1] 晏鄂川[1] 陈武 YANG Kai;YAN E'chuan;CHEN Wu(Faculty of Engineering,China University of Geosciences (Wuhan),Wuhan 430074,China;Shanghai Municipal Engineering Design and Research Institute (Group) Co.,Ltd.,Shanghai 200092,China)

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074 [2]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《安全与环境工程》2020年第3期163-177,共15页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(41672313)。

摘　　要：空间变异性是地质体的固有性质,岩体质量不可避免地具有空间变异性。依托宁波百地年地下水封洞库项目,以围岩质量的空间变异性为研究对象,基于区域化变量理论对场区岩体质量Q值的空间变异性特征进行了分析,在此基础上采用序贯高斯模拟(SGS)对场区岩体质量Q值的空间变异性进行了表征,并构建岩体质量Q值的三维随机场,通过对多次SGS随机实现结果的统计分析,以概率统计的手段预测了研究区岩体质量的空间分布状况。结果表明:不同滞后距变差函数图大体相同,大滞后距下会使变差函数图丧失局部特征;Q值在竖直方向上的结构性比水平面上的好;相关性最好的方向为NE35°水平方向;通过SGS随机实现的平、纵、横剖面以及三维视图较为全面地揭示了场区岩体质量Q值的空间分布特征;SGS随机模拟较好地表征了场区岩体质量的空间自相关性、变异性、各向异性等特征。Spatial variability is an inherent property of geological bodies.Rock mass inevitably has spatial variability.Based on the 100-year underground water-sealed cavern project in Ningbo,this paper studies the spatial variability of surrounding rock mass.Based on the theory of regionalized variables,the paper analyzes the spatial variability of Q-value of rock mass in the field area.On this basis,the paper uses sequential gaussian simulation(SGS)to represent the spatial variability of Q-value of rock mass.Moreover,the paper constructs a three-dimensional random field of Q-value,and gives several methods based on probability theory to predict the spatial distribution of rock mass based on the statistical analysis of multiple SGS random realization results.The results show that the experimental variogram with different lag distances is basically the same,and the variogram with large lag distances will lose its local features.The structure is better vertically than horizontally;the best correlation direction is NE35°horizontal.The spatial distribution characteristics of mass Q-value of rock mass are revealed by the random horizontal,vertical and tran-sverse sections and three-dimensional views of SGS.SGS stochastic simulation has well characterized the spatial autocorrelation,variability and anisotropy of the rock mass.

关 键 词：地下水封洞库 岩体质量Q值 空间变异性 三维表征 区域化变量 序贯高斯模拟(SGS) 

分 类 号：X935[环境科学与工程—安全科学] TE972.2[石油与天然气工程—石油机械设备]