“桩—索—锚网喷”组合支护在明洞基坑的应用

Application of “pile-sand-anchor spray” combined support in foundation pit of opencut tunnel

结合某铁路隧道明洞深基坑开挖工程实例,从“桩—索—锚网喷”组合支护体系的支护基本结构、受力特点、施工及相关问题等方面进行论述,并进行有限元模拟分析,证明预应力锚索抗滑桩具有受力机理明确、结构合理、工程造价低、便于施工等优点。

Combined with the excavation project of a deep tunnel in opencut tunnel of a railway the basic structure,mechanical characteristics,construction and related problems of the composite support system of pile-sand-anchor spray are discussed and limited.The meta-simulation analysis proves that the prestressed anchor cable anti-slide pile has the advantages of clear force mechanism,reasonable structure,low engineering cost and easy construction.