复合土钉技术在软土基坑工程中的应用

Application of Compound Soil-nailed Support Techniques in Foundation Pit in Soft Clays

复合土钉支护技术是将土钉墙与深层搅拌桩、树根桩及预应力锚杆等结合起来 ,通过各种组合而形成的新型复合基坑支护方法 ,它大大扩展了土钉支护的应用范围 ,表现出了较好的综合效益。通过工程实例的形式介绍在深厚软土地区复杂环境条件下采用这种复合土钉支护技术控制变形的设计思路和施工中特殊情况的处理措施。

Compound soil-nailed support techniques is the combinations of soil-nailed wall?deep mixed piles?micro-piles and pre-stressed anchorages,etc. It is a kind of compound support technique in foundation pits through various combinations. It extends the applications of soil nails greatly,and good comprehensive benefits can be gained. Through a engineering case,the design philosophy of compound soil-nailed support techniques to control displacement in complex geological and environmental conditions in deep soft soil areas were introduced in this paper. The treatment measures of special circumstances in construction were also given.