内表面补强对缺陷病害隧道结构承载力影响的模型试验研究  

Research on effect of inner surface reinforcing on structure bearing capacity by model test in defective tunnel

作　　者：何川[1] 唐志成[1] 汪波[1] 汪洋[1] 佘健[2] 

机构地区：[1]西南交通大学地下工程系,成都610031 [2]重庆高速公路发展有限公司,重庆400042

出　　处：《岩土力学》2009年第2期406-412,共7页Rock and Soil Mechanics

摘　　要：以重庆市在建的笔架山隧道为现场原型,采用几何比为1:25的大比例室内模型试验,选取Ⅲ级类围岩拱顶空洞60°的缺陷隧道为研究对象,重点研究在相同围岩级别、缺陷形式及加载方式下结构产生病害后,采用不同的内表面补强材料刚度并考虑补强范围对结构最终承载力的影响,得出了相应补强形式条件下结构最终破坏时的形式、内力分布等状况,并通过对比不同补强方式时的结构破坏及受力状况得出合理的结论,以期对隧道的维护管理提供重要的参考依据。Taking the Bijiashan tunnel under construction in Chongqing city as prototype and geometric similarity ratio of 1: 25 is adopted in model test,then selecting cavity of 60° range in arch crown of level Ⅲ surrounding rock as the objects,the research is carried out.During the model test,firstly,applying the load on the structure till it produces the defects,and then applied load again while the structure is destroyed after taking different inner surface reinforcing at the same rock mass and load form in tunnel...

关 键 词：缺陷隧道 病害 内表面补强 模型试验 

分 类 号：U451[建筑科学—桥梁与隧道工程]