西安地铁地裂缝段隧道结构及防水技术研究

The main structure of ground cracks in Xi′an Metro tunnel and waterproof technology measures

目的为西安地铁安全、可靠地通过地裂缝,研究主体结构及防水相关技术措施并加以应用。方法采用地铁隧道主体结构适应地裂缝错动变形的思路,以"局部加强、预留净空、分段处理、柔性接头、先结构后防水"为原则,制定相应技术措施。结果西安地铁隧道主体结构采用了在通过地裂缝段设置特殊变形缝以适应错动变形以及布设"U"型止水带防治地下水的技术措施。结论技术措施实现了西安地铁安全、可靠通过地裂缝的要求,可应用于西安地铁工程建设。

Aim For the safety and reliability of Xi＇an Metro to be constructed in the ground crack,the main structure, the technical measures of waterproof and its application were studied. Methods According to the idea that the main structure adapts to the tunnel deformation cracks, principles such as ＂ partial strengthening, reserving space, subsection processing, flexible joints, structure first waterproof second＂ are followed to formulate the corre- sponding technical measures. Results In the mainstructure of Xi＇an Metro tunnel special distortion seam are adopted in the ground crack section to adapt to rupture deformation and layont ＂U＂ type waterstop technical measures are used for the prevention and control of groundwater. Conclusion The technical measures proposed by Xi＇an Metro satisfy the requirement of safe, reliable construction through the ground crack and can be used in Xi＇an Metro engineering construction.