锁口钢管桩围堰在复杂地质条件下桥梁深基坑支护中的应用

Application of Locking Steel Pipe Pile Cofferdam in Retaining and Protection for Deep Bridge Excavations Under Complex Geological Conditions

复杂水文地质情况、苛刻的施工控制(工作面、环保等)条件使得深基坑支护日益成为复杂系统工程。结合跨纳潮河大桥工程的深基坑支护,对桥梁深基坑支护中,采用锁口钢管桩围堰和型钢内支撑相结合的方法进行施工方案及效果的介绍。实践表明,在复杂地质条件下,该支护方案稳定、可靠,锁口止水性能优异,可恢复性好。

Abstract： Deep excavations tend to be complex systems engineering under complex hydrological/geologi- cal conditions as well as rigor construction requirements such as working face, environment protection, etc. This paper illustrated the application of locking steel pipe pile cofferdam and section steel struts in re- taining and protection for Na-ehao River bridge deep excavations. It showed that this scheme is stable, re- liable, and has good water-locking function and recoverability as well.