平面装药条件下洞室受力特征试验研究  

Model test study of tunnel mechanical characteristics under plane charge explosion

作　　者：陈安敏[1] 顾金才[1] 徐景茂[1] 孔福利[1] 明治清[1] 

机构地区：[1]总参工程兵科研三所,河南洛阳471023

出　　处：《岩土力学》2011年第9期2603-2608,共6页Rock and Soil Mechanics

摘　　要：通过抗爆结构模型试验,研究了洞室围岩与衬砌结构受力变形特征。介绍了模型试验原理及平面装药爆炸模型试验方法,根据试验实测结果分析了设计爆炸荷载和超载条件下毛洞与衬砌洞室的洞周应力峰值分布特点,给出了两种工况条件下洞室围岩变形特征,从拱顶-底板相对位移、洞壁应变峰值、洞壁应变随时间变化等方面进行了对比分析。试验结果表明,衬砌支护措施可有效提高洞室的抗爆能力,是提高工程抗力等级的重要技术手段。Through the model test of blast-resistance structure of the tunnel,the deformation behaviour of the surrounding rock and lining structure of the tunnel is studied.The principle and method of plane charge explosion model test is introduced.Based on the test results,the stress peak value distribution characteristics around the tunnel under the design load and overload conditions are analyzed.The deformation behaviours of surrounding rock under the above two conditions are put forward.Contrast analysis is carried out in several aspects,including relative displacement between arch crown and tunnel floor,strain peak value around the tunnel wall,variation of strain on the tunnel wall with time,etc.Test results show that the supporting structure of lining can improve the blast-resistance ability of the tunnel efficiently.It is an important technical method to improve the resistance grade of the tunnel.

关 键 词：岩土工程 洞室 平面装药 抗爆模型试验 变形特征 

分 类 号：TU452[建筑科学—岩土工程]