高速公路工程中粉喷桩复合地基最大侧向变形研究

›› 2005, Vol. 26 ›› Issue (4): 604-607.

高速公路工程中粉喷桩复合地基最大侧向变形研究

邓永锋，刘松玉，洪振舜

东南大学交通学院，南京 210096

收稿日期:2004-05-06 出版日期:2005-04-09 发布日期:2013-12-19
作者简介:邓永锋，男，1978年生，博士研究生，主要研究方向为软基处理及变形分析
基金资助:
教育部博士点基金项目资助(No.2001028618)和东南大学优秀博士学位论文基金资助(No. YBJJ0411)。

Maximum lateral deformation of dry mixing column composite foundation in expressway engineering

DENG Yong-feng, LIU Song-yu, HONG Zhen-shun

College of Transportation, Southeast University, Nanjing 210096, China

Received:2004-05-06 Online:2005-04-09 Published:2013-12-19

摘要/Abstract

摘要： 分析了粉喷桩复合地基路堤填筑过程中最大侧向变形发展的特性，确定了坡脚处最大侧向变形与路中沉降呈双直线的关系，坡脚处最大侧向变形在大部分填筑过程中与路中沉降呈 0.115的关系。对比分析了粉喷桩复合地基和天然地基侧向变形发展规律的差异，并基于复合地基理论分析，认为导致它们差异变化的原因是粉喷桩复合地基桩-土应力分担比的变化。

关键词: 粉喷桩, 复合地基, 侧向变形, 桩土应力比

Abstract: This paper investigated the relationship between the maximum lateral deformation and the vertical settlement of dry mixing column composite foundation under embankment loads. The relationship is a bilinear one which is the same as that reported for natural soft ground. But for the dry mixing column composite foundation, the incremental ratio of maximum lateral deformation over vertical settlement at the second stage is much smaller than that at the first stage. This result is contrary to that reported for natural soft ground under embankment loads. The reason responsible for the difference is contributed to the change in the stress ratio of pile to soil. The analysis also indicates that the deformation of the second stage mainly controls the construction quality of embankment for the dry mixing column composite foundation. Based on the compiled data of dry mixing column composite foundation, the incremental ratio of maximum lateral deformation over vertical settlement at the second stage is about 0.115.

Key words: dry mixing column (DMC), composite foundation, lateral deformation, stress ratio of pile to soil

中图分类号:

TU473

邓永锋，刘松玉，洪振舜. 高速公路工程中粉喷桩复合地基最大侧向变形研究[J]. , 2005, 26(4): 604-607.

DENG Yong-feng, LIU Song-yu, HONG Zhen-shun. Maximum lateral deformation of dry mixing column composite foundation in expressway engineering[J]. , 2005, 26(4): 604-607.

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