组合式边坡支护设计在一深大基坑工程中的应用

护坡桩、挡土墙、预应力锚杆、压力注浆等施工工艺在一个深基坑支护工程中的综合应用,尤其在采用了挡土墙与桩锚组合支护方案后,改变了以往为控制变形采用刚性支点法(等值梁法)的设计思路,在一定变形范围内,用弹性支点法设计护坡桩与锚杆,大大降低了工程造价,保证了基坑支护系统的安全性、可靠性,并取得了成功.本文概述了以上施工方法的设计、施工概况及主要技术措施.

The Application of Combined Slope Support in Deep Foundation

In a support engineering for deep foundation , a combined slope support technology is applied wiht piling,retaining wall, pre-stressed anchor and pressure grouting. In order to control the distortion , an elastic pivor method is usedto replace the traditional rigid pivot method (equivalence girder method).Tnerefore,the engineering cost is greatly reduced,the security and reliability of support system is also guaranteed.