深长隧道突水地质灾害三维模型试验系统研制及其应用  

Development and application of 3D model test system for water inrush geohazards in long and deep tunnels

作　　者：李浪[1] 戎晓力[1] 王明洋[1] 卢浩[1] 夏沅谱 张志成[1] 

机构地区：[1]f解放军理工大学爆炸冲击防灾减灾国家重点实验室,江苏南京210007

出　　处：《岩石力学与工程学报》2016年第3期491-497,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展计划(973)项目(2013CB036005)~~

摘　　要：深长隧道突水地质灾害中的最小安全隔水岩层厚度研究对于工程设计施工具有重要指导意义。基于相似模型试验的方法,研制出一套深长隧道突水地质灾害三维模型试验系统。该系统由三维模型试验主装置、试样成型装置以及模拟隧洞开挖卸荷掘进装置组成,能够满足模型对所受地应力场、水压等初始环境的模拟。试验系统具有荷载稳定、可精确模拟隧洞开挖、试验方便简洁、周期短并能开展大样本统计试验等特点。将该试验系统应用于成都—兰州(成兰)铁路线龙门山隧道的突水三维模型试验中,试验围压、轴压为0.6 MPa,水压为0.2 MPa时,获得模型最小安全隔水岩层厚度为47 mm,试验结果可有效指导工程的设计与施工。The study of minimum thickness of waterproof slab in long and deep tunnels is very significant in the process of engineering design and construction. A three-dimensional model test system for simulation of water inrush geohazards was developed. The test system has a three-dimensional model test device,a sample molding device and a device simulating tunnel excavation and unloading,so that the initial in-situ stress,water environment and process of tunnel excavation and unloading can be simulated. The test system is convenient and easy to operate and has the characteristics of short testing period and good loading stability. The system can carry out tests of large number of samples for statistical analysis and accurately simulate the process of excavation of the tunnel. Model tests were performed to simulate the water inrush geohazards at Longmen mountain tunnel of Chengdu to Lanzhou railway line. The confining and axial pressures of the test were both set as 0.6 MPa and the water pressure was 0.2 MPa. In this case,the minimum thickness of waterproof slab was 47 mm. The test results were used to guide the design and construction of the projects.

关 键 词：隧道工程 隔水岩层厚度 模型试验 试验装置 相似理论 

分 类 号：U45[建筑科学—桥梁与隧道工程]