基于有限元数学模型的隧道围岩初始地应力场反演  

The Inversion of Initial Geostress Field of Tunnel Surrounding Rock Based on FEM Model

作　　者：陈香梅[1] 任永强[2] 徐智勇[1] 范建强[3] 

机构地区：[1]中国地质大学地球物理与空间信息学院,湖北武汉430074 [2]中国地质大学工程学院,湖北武汉430074 [3]中国地质大学资源学院,湖北武汉430074

出　　处：《工程地球物理学报》2011年第6期767-773,共7页Chinese Journal of Engineering Geophysics

摘　　要：由于初始地应力场的分布是影响隧道围岩稳定性的重要因素之一,得合理有效地模拟地应力场的分布在隧道工程中的应用显的尤为重要。本文根据地应力实测数据和有限元数学模型,提出了区域构造应变回归分析方法。在此基础上结合工程实例,运用构造应变回归分析和当前应用广泛的边界应力回归分析两种方法模拟了隧道围岩的地应力场的分布,并对两种方法计算结果进行了评价。研究结果表明,以构造应变进行回归分析计算,其方法是可行的,成果更可靠,结果可供相同的隧道工程施工和设计参考。The distribution of the initial geo stress field affecting the stability of surrounding rock is one of the important factors,so a rational and effective simulation method of geo stress field distribution in the tunnel engineering is particularly important.The paper,based on measured data and finite element mathematical model,proposes a new method of regression analysis,regional tectonic strain.With practical projects,the paper uses the two methods-structural and tectonic stress strain regression analysis and the current widely used regression analysis of boundary to simulate the tunnel surrounding rock geo stress field distribution.Then the results of the two methods are evaluated.This study shows that taking the tectonic strain as regression analysis is feasible and the result is more reliable.

关 键 词：初始地应力场 构造应变 有限元 回归分析 

分 类 号：P631[天文地球—地质矿产勘探]