深基坑双排桩支护结构施工设计计算分析

ANALYSIS ON CONSTRUCTION DESIGN OF DOUBLE-ROW PILE RETAINING STRUCTURE IN DEEP FOUNDATION PIT

作为一种新型深基坑支护结构,双排桩支护结构本质上是一种悬臂支挡结构,是通过竖向双排混凝土灌注桩、刚性连系梁和冠梁形成空间门架式支护结构体系,侧向刚度相对较大,可以对深基坑的变形进行有效控制。对襄阳内环线工程跨襄阳北编组站大桥主塔深基坑进行施工设计及计算分析,从荷载取值、土压力计算、嵌固深度、稳定性分析等方面,详细阐述双排桩计算过程。并利用有限元计算软件建模分析开挖过程,为深基坑开挖提供合理分层厚度,进一步确保工程施工安全,为类似工程提供参考。

As a new type of deep foundation pit supporting structure,the double-row pile supporting structure is essentially a cantilever supporting structure,which is a spatial portal supporting structure system formed by vertical double-row concrete pouring piles,rigid connecting beams and crown beams,with relatively large lateral stiffness,which can effectively control the deformation of deep foundation pit.The construction design and calculation analysis of the deep foundation pit of the main tower across Xiangyang North Marshalling Station Bridge in Xiangyang Inner Ring Road Project are carried out,and the calculation process of double-row piles is expounded in detail from the aspects of load value,earth pressure calculation,embedded depth and stability analysis.The finite element calculation software is used to model and analyze the excavation process,so as to provide reasonable layered thickness for deep foundation pit excavation and further ensure the safety of engineering construction.Provide reference for similar projects.