高地应力软硬岩隧道初始应力场反演分析  

Inverse Analysis of the Initial Stress Field in High Ground Stress Soft and Hard Rock Tunnels

作　　者：徐安 全晓娟[1] 汪波[1] 沈艳芳 谭力豪 谢卓雄 XU An;QUAN Xiaojuan;WANG Bo;SHEN Yanfang;TAN Lihao;XIE Zhuoxiong(Southwest Jiaotong University,Key Laboratory of Transportation Tunnel Engineering,Ministry of Education,Chengdu 610031,China;Hangzhou DODRIVE Engineering Material Ltd.,Hangzhou 310006,China;Guangdong Communication Planning&Design Institute Group Co.,Ltd.,Guangzhou 510507,China)

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,成都610031 [2]杭州图强工程材料有限公司,杭州310006 [3]广东省交通规划设计研究院股份有限公司,广州510507

出　　处：《铁道标准设计》2022年第8期137-142,共6页Railway Standard Design

基　　金：国家自然科学基金项目(51878571,U2034205);浙江省交通运输厅科研计划项目(2021051)。

摘　　要：地下工程中初始地应力场对设计及施工起到控制性影响,所以更准确获得并分析初始应力场是至关重要的,而反演分析是其重要的获取手段。以浩吉铁路九岭山隧道和桐木隧道为工程背景,基于理论分析与现场实测信息,分析不同岩性隧道下初始应力场的反演准则,并提出相应的主控指标;同时,根据工程实际分别以硬岩、软岩隧道为例,利用数值仿真方法计算得到与实测洞壁二次应力和位移相契合的初始应力场应力边界条件,从而得到依托工程的初始应力场分布特征。计算结果表明:硬岩隧道测点段竖向初始应力20.35 MPa,水平初始应力17.908 MPa;软岩隧道测点段竖向初始应力11.7 MPa,水平初始应力6.201 MPa。The initial ground stress field in underground engineering has a controlling influence on design and construction and it is crucial to obtain and analyze the initial stress field more accurately. The inversion analysis is an important means to obtain it. This paper uses the Jiuling Mountain Tunnel and Tongmu Tunnel of the Haolebaoji-Ji’an Railway as the engineering background. It analyzes the inversion criteria for the initial stress field of tunnels with different lithology, and proposes corresponding master control indexes based on theoretical analysis and field measurement information. Meanwhile, numerical simulation method is used to calculate the initial stress boundary conditions that are consistent with the measured secondary stress and displacement of the tunnel wall according to the actual project of hard rock and soft rock tunnels respectively. Therefore, the initial stress distribution characteristics of the dependent project are obtained: 20.35 MPa vertical initial stress and 17.908 MPa horizontal initial stress in the measuring point section of the hard rock tunnel;11.7 MPa vertical initial stress and 6.201 MPa horizontal initial stress in the measuring point section of the soft rock tunnel.

关 键 词：铁路隧道 高地应力 硬软岩 初始应力场 反演分析 主控指标 应力边界条件 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]