摘要
为获取在不同地应力、围岩类型以及水压下隧道突水时的最小安全岩层厚度,基于深长隧道最小安全岩层厚度概念,采用岩石的相似原理,研制了一种用于模拟突水灾害的模型试验系统,主要由主装置、模型试样压实装置和掘进装置组成,该模型试验系统可实现对不同地应力、围岩类型以及水压的模拟.研究结果表明:当试验围压、轴压设定为0.42 MPa时,水压为0.14 MPa时,获得了突水时模型最小安全隔水板厚度为31.12 mm,换算成真实岩石的厚度为3.112 m,与FLAC3D建模计算得到的最小安全隔水板厚度3.33 m比较接近,从而验证了模型试验的可靠性.
In order to obtain the waterproof-resistant slab minimum thickness under the different initial in-situ stress, water environment and condition of rock types, a model test system that can be used for simulation of water inrush geohazards, is researched and manufactured by using similarity theory of rock based on the concept of waterproof-resistant slab minimum thickness. The test system includes a major model test device, a sample molding device and the device simulation of tunnel excavation. The test system can simulate the initial in-situ stress and water environment under the different condition of rock types. The confining pressure and axial pressure of the test are set as 0.42 MPa with the water pressure of 0.14 MPa. The test model of waterproof-resistant slab minimum thickness of 31.12 mm was gained when water inrush occurred. The waterproof-resistant slab minimum thickness of real rock is 3.112m. And the waterproof-resistant slab minimum thickness of finite element model 3.33m had been obtained using FLAC3D. Studies provide data and bases of manufacturing model test system for forecasting the water inrush geohazards in long deep-located tunnels.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2016年第11期1266-1271,共6页
Journal of Liaoning Technical University (Natural Science)
基金
国家重点基础研究发展计划(973)项目((2013CB036005)
关键词
模型试验
最小安全岩层厚度
突水
围岩压力
加载系统
model test
waterproof-resistant slab minimum thickness
water inrush
pressure of surrounding rock
loading system
作者简介
张志成（1990-），男，福建福安人，硕士研究生，主要从事岩土力学、地下工程风险管理等方面的研究．
