天山某深埋隧道地应力变化对比分析  

Comparative Analysis of the Ground Stress Changes in a Deep Buried Tunnel in Tianshan

作　　者：池建军[1] 滕杰[1] 尚彦军[2,3,4] 吴彤 邵鹏[2,3] 闫晓石 Chi Jianjun;Teng Jie;Shang Yanjun;Wu Tong;Shao Peng;Yan Xiaoshi(China Water Resources Beifang Investigation,Design and Research Co.Ltd.,Tianjin,300222,China;Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,100029,China;University of Chinese Academy of Sciences,Beijing,100049,China;Xinjiang Key Laboratory of Geohazard Prevention(Xinjiang Institute of Engineering)Urmuqi,Xinjiang,830023,China)

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222 [2]中国科学院地质与地球物理研究所,北京100029 [3]中国科学院大学,北京100049 [4]新疆地质灾害防治重点实验室(新疆工程学院),新疆乌鲁木齐830023

出　　处：《新疆地质》2023年第3期431-435,共5页Xinjiang Geology

基　　金：科技部第二次青藏高原综合科学考察研究项目(2019QZKK0904);新疆维吾尔自治区重点研发专项(2022B03001-2)共同资助。

摘　　要：天山造山带在断层、褶皱等地质构造影响下,地应力沿隧道轴线出现突变现象引起业界关注,其大小和方向空间分布不确定性诱发大变形、岩爆或突涌水等地质灾害交替出现,给工程造成很大损失。将天山某隧道前期勘察钻孔和施工阶段洞内共24处123条地应力测量结果记录对比分析发现,约800 m深度的线性和指数变化特征差异。同时地应力3分量大小顺序关系导致不同深度上出现逆断型、走滑型和正断型地应力类型,是埋深1200 m以上垂向应力具最大主应力张性特点。本文地应力实测结果对比分析可望为类似工程提供参考。The phenomenon of sudden changes in ground stress along the tunnel axis under the influence of geological structures such as faults and folds in the orogenic belt has attracted industry attention.The uncertainty in the spatial distribution of its size and direction leads to the alternating occurrence of various types of geohazards such as squeezing,rock burst,or sudden water inflow,often causing great losses to engineering.This article compares and analyzes the results of 123 in-situ stress measurements at 24 locations in a tunnel in Tianshan during the preliminary engineering geological survey and tunnelling stages,and finds the differences in linear and exponential variation characteristics above and below a depth of 800m.The sequential relationship between the three components of in-situ stress results in the occurrence of reverse fault type,strike slip type,and normal fault type in-situ stress types at different depths,especially the characteristic of vertical stress becoming the maximum principal stress at a buried depth of over 1200 m.The comparative analysis of insitu stress measurement results in this article is expected to provide reference for similar projects in that area.

关 键 词：天山 隧道 地应力 地质构造 

分 类 号：U45[建筑科学—桥梁与隧道工程] P315.727[交通运输工程—道路与铁道工程]