旋喷搅拌加劲桩对软土基坑支护的机理及其支护刚度的确定方法

刘全林

旋喷搅拌加劲桩对软土基坑支护的机理及其支护刚度的确定方法 English Version

刘全林

上海强劲地基工程股份有限公司，上海 200235

详细信息

作者简介:
刘全林 (1962 – ) ，男，安徽六安人，博士，教授，主要从事地基基础、结构与介质相互作用分析及行业信息化技术的研究与应用工作。

中图分类号: TU47
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出版历程
- 收稿日期: 2011-04-26
- 发布日期: 2011-11-30

Supporting mechanism and stiffness of jet grouting mixing stiffening piles in foundation pits in soft clay

LIU Quan-lin

Shanghai Qiangjin Foundation Engineering Co., Ltd., Shanghai 200235, China

摘要

摘要: 旋喷搅拌加劲桩是一种新型的基坑主动支护技术，工程实践表明，针对淤泥质软土地层，相对于普通的锚杆、土钉支护形式，加劲桩特有的桩身结构和成形工艺大大增强了桩体抗拔力和桩侧土体的强度，对深基坑变形控制效果较好。基于斜向单桩的静载试验，得到了加劲桩的荷载–变形规律，给出了量化评定加劲桩支护对桩侧土体加固效果的方法；提出了软土流变应力控制、桩侧土应力集度控制是加劲桩在淤泥质软土基坑中成功应用的关键，建立了加劲桩的加固和支护刚度计算方法，用以指导设计与施工。
- 软土 /
- 深基坑 /
- 支护 /
- 加劲桩 /
- 作用机理
Abstract: The jet grouting mixing stiffening pile is a new and initiative supporting technology in foundation pits. Engineering practices show that the unique structural design of stiffening piles enhances the pullout resistance and soil strength. The foundation deformation of stiffening piles is better than that of bolting and nailing in soft soil. The load-deformation laws of stiffening pile are illustrated by static load tests. A method to quantitatively assess the pile side soil reinforcement of stiffening piles is derived. It is proposed that the rheological stress and concentration stress are the key factors to apply the stiffening piles in soft foundation pits. The reinforcement and support stiffness method is put for ward to guide the design and construction.
- soft soil /
- deep foundation pit /
- support /
- stiffening pile /
- mechanism

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参考文献(9)

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