引黄济宁工程长大深埋隧洞地应力场分区特征综合推演  

Comprehensive Deduction of In-Situ Stress Field Characteristics in Long and Deep Buried Tunnels of Yellow River to Xining Diversion Project

作　　者：杨继华 郭卫新 崔臻[2] 万伟锋 姚阳 Yang Jihua;Guo Weixin;Cui Zhen;Wan Weifeng;Yao Yang(Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China;Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China)

机构地区：[1]黄河勘测规划设计研究院有限公司,郑州450003 [2]中国科学院武汉岩土力学研究所,武汉430071

出　　处：《吉林大学学报(地球科学版)》2025年第2期525-535,共11页Journal of Jilin University:Earth Science Edition

基　　金：国家自然科学基金项目(52079133);黄河勘测规划设计研究院有限公司自主研究开发项目(2020-ky04,2022KY003,2023KY014)。

摘　　要：针对深埋隧洞地应力场问题,以青海省引黄济宁工程长大深埋隧洞为背景,采用区域构造演化分析、现场水压致裂测试、数值推演的方法,确定了隧洞各段的地应力特征。结果表明:引黄济宁工程隧洞受青藏高原东北缘块体挤压运动的影响,主压应力方向为NE-NEE向;隧洞地应力场可分为3个区,其中拉脊山段最大水平主应力侧压力系数达到2.0;隧洞穿越拉脊山时最大埋深超过了1400 m,最大水平主应力超过70 MPa,可能对隧洞围岩稳定造成较大影响。Aiming at the problem of the in-situ stress field in long and deep buried tunnels,taking the deep buried tunnel of Yellow River to Xining diversion project in Qinghai Province as the background,the regional tectonic evolution analysis,on-site hydraulic fracturing testing,and numerical deduction methods were used to determine the in-situ stress characteristics of each section of the tunnel.The research results show that the tunnel of Yellow River to Xining diversion project is affected by the compression movement of the blocks in the northeast margin of the Qinghai-Xizang Plateau,and the main compressive stress direction is NE-NEE direction;The stress field of the tunnel can be divided into three regions,with the maximum horizontal principal stress lateral pressure coefficient of 2.0 in the Laji section;The maximum buried depth of the tunnel when crossing the Laji Mountain exceeds 1400 m,and the maximum horizontal principal stress exceeds 70 MPa,which may have a significant impact on the stability of the tunnel surrounding rock.

关 键 词：引黄济宁工程 深埋隧洞 地应力场 地应力 水压致裂测试 数值推演 

分 类 号：TV221.2[水利工程—水工结构工程]