应力场对缺陷隧道承载力影响的模型试验研究  

Study on Effects of Stress Field for Bearing Capacity in Defect Tunnel

作　　者：何川[1] 唐志成[1] 汪波[1] 佘健 

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：《地下空间与工程学报》2009年第2期227-234,共8页Chinese Journal of Underground Space and Engineering

摘　　要：隧道在施工及使用过程中结构的稳定性受众多因素影响,但最重要的影响因素归纳起来主要有两点:岩体条件及应力条件。同时,公路隧道在建设过程中由于受施工条件等诸多因素限制而易造成衬砌厚度不足,而对于存在缺陷的隧道受上述因素的影响研究目前尚不多见。基于此,以重庆市在建的笔架山隧道为现场原型,在室内采用几何比为1∶25的大比例模型试验,全面研究结构在相同缺陷、不同围岩、不同地应力场作用下,隧道产生病害的形式、规律以及承载力的大小,得出不同围岩条件下地应力场对结构承载力的影响程度大小的结论,以期为今后的维修加固提供指导依据。Structure stability is influenced by many factors during tunnel construction and operation, but there are two points more important： conditions of rock mass and stress field. At the same time, the lining often are not thick enough because of poor construction condition etc. , however, the research on the above-mentioned reasons was very poor. Therefore, taking the building tunnel of Bijia mountain in Chongqing city as prototype and a model test with geometric similarity ratio of 1 ： 25 is adopted to study the forms, rules of disease and structure bearing capacity of the tunnel in different rock mass, crustal stress with the same defect, then it concludes that the magnitudes and rules of structure bearing capacity were influenced by the stress field in different rock mass, and offered instruction to maintaining and reinforcing the tunnel in future.

关 键 词：公路隧道 应力场 模型试验 病害 补强 

分 类 号：TU984.113[建筑科学—城市规划与设计]