基于水压致裂法的深埋山岭隧道地应力特征分析及应用  

Analysis and Application of In-situ Stress Characteristics of Deep Buried Mountain Tunnels Based on Hydraulic Fracturing Method

作　　者：王坛华 WANG Tanhua(Fujian Communications Planning and Design Institute Co.,Ltd.,Fuzhou 350004,China;Research and Development Center of Transport Industry of New Materials,Technologies Application for Highway Construction and Maintenance of Offshore Areas,Fuzhou 350004,China)

机构地区：[1]福建省交通规划设计院有限公司,福州350004 [2]近海公路建设与养护新材料技术应用交通运输行业研发中心,福州350004

出　　处：《路基工程》2023年第3期165-170,共6页Subgrade Engineering

基　　金：国家自然科学基金青年项目(42007261);福建省自然科学基金项目(2021J05026)。

摘　　要：以莆田至永定高速公路白鸽岭隧道地应力测试为例,介绍地应力测试基本原理和过程。通过分析多年积累的福建地区16个隧道实测地应力测试成果,采用回归分析法建立最大和平均侧压力系数与埋深的函数关系,并用于预测隧道地应力水平和判定岩爆等级。研究表明:乘幂函数能较好地反映600 m以内埋深地应力变化规律。其成果可供福建地区隧道地应力评价参考。Taking the in-situ stress test of Baigeling Tunnel of Putian—Yongding Expressway as an example,this paper introduces the basic principle and process of in-situ stress test.By analyzing the measured in-situ stress test results of 16 tunnels in Fujian area accumulated over the years,this paper uses regression analysis to establish the functional relationship between the maximum and average lateral pressure coefficients and the buried depth,which is used to predict the tunnel in-situ stress level and determine the rock-burst grade.The research shows that the multiplicative power function can better reflect the change law of in-situ stress within 600 m.Its research results can provide a reference for the evaluation of in-situ stress of tunnels in Fujian area.

关 键 词：水压致裂法 地应力 回归分析 侧压力系数 岩爆 

分 类 号：U452.1[建筑科学—桥梁与隧道工程]