湿喷桩施工中饱和粉土的触变性研究

徐永福; 王驰; 黄铭; 许杰; 杨磊

湿喷桩施工中饱和粉土的触变性研究 English Version

徐永福¹,
王驰¹,
黄铭²,
许杰¹,
杨磊¹

1. 上海交通大学船舶海洋和建筑工程学院,上海 200240; 2 泰州公路管理处,江苏泰州 225300

基金项目: 江苏省交通运输厅科研项目（09Y01）

详细信息

作者简介:
徐永福(1967- )，男，江苏泰兴人，博士，教授，博士生导师，主要从事分形介质力学、非饱和土力学和地基处理等研究。E-mail: yongfuxu@sjtu.edu.cn。

中图分类号: TU47
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出版历程
- 收稿日期: 2012-12-17
- 发布日期: 2013-10-19

Thixotropy of saturated silty soils due to construction of DCM columns

1. Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China, 2. Road Administration Bureau of Taizhou City, Taizhou 225300, China

摘要

摘要: 针对某高速公路软基处理中出现的湿喷桩下沉现象,通过埋设孔隙水压力传感器和土压力传感器,比较湿喷桩施工桩周土的水平向土压力和超孔隙水压力的大小关系,提出湿喷桩下沉的判别方法。根据现场静力触探试验、取土样和室内土力学试验结果,分析湿喷桩施工扰动下饱和粉土的触变性,粉土强度随时间延长而增加。
- 饱和粉土 /
- 路基 /
- 湿喷桩下沉 /
- 触变 /
- 超孔隙水压力
Abstract: Sinking of DCM columns at their tops occurs in some highways. In order to explain the reason of the sinking of DCM columns, pore water pressure cells and earth pressure cells are installed in the soils among DCM columns at different depths. A method to predict the sinking of columns is presented according to the difference between the earth pressure and the excess pore water pressure. The thixotropy of saturated silty soils due to the construction of DCM columns is studied using the results of static cone penetration tests and in-situ and laboratory results of soil mechanics. The strength of saturated silty soils increases with time after the construction of DCM columns.
- saturated silty soil /
- subgrade /
- sinking of DCM column /
- thixotropy /
- excess pore water pressure

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参考文献(17)

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