对拉结构在邻近深基坑中的应用

Application of Cross Structures in Neighboring Foundation Pits

为了解决特殊情况下相邻深基坑围护结构的支护问题,采用了对拉结构,通过采用联系梁及对拉锚索,将相邻深基坑的围护结构与土体连结成有机整体,使得围护结构与围岩协同作用,充分利用围岩的自稳能力,保证基坑的安全。文章通过对几个工程案例的分析,阐明了对拉结构的计算模式、计算要点及构造组成,明确了计算方法和设计思路。经工程实践,对于场地狭小、周边环境复杂的邻近深基坑,对拉结构具有独特优势。

This paper introduces a kind of cross structure to neighboring foundation pits to act as the bracing system of the foundation pits. The cross beams and the cross anchors keep the retaining structure and the soil mass into an integral part. The cross structure makes full use of the stability of the rock mass and ensures the safety of the foundation pits. Based on the analysis on the engineering cases, this paper provides the structure calculation model, the key points of the calculation and the structural composition, and confirms the calculation method and the design concept. The engineering practice proves that the cross structure has unique advantages to cope with the problems of neighboring foundation pits in small site areas and complex environment.