| 湿喷桩施工中饱和粉土的触变性研究 |
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| 引用本文： | 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[J]. 岩土工程学报, 2013, 35(10): 1784-1789 |
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| 作者姓名： | 徐永福 王驰 黄铭 许杰 杨磊 |
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| 作者单位： | 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 |
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| 基金项目： | 江苏省交通运输厅科研项目（09Y01） |
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| 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。
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| 关 键 词： | 饱和粉土 路基 湿喷桩下沉 触变 超孔隙水压力 |
| 收稿时间： | 2012-12-18 |
Thixotropy of saturated silty soils due to construction of DCM columns |
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| XU Yong-fu,WANG Chi,HUANG Ming,XU Jie,YANG Lei. Thixotropy of saturated silty soils due to construction of DCM columns[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(10): 1784-1789 |
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| Authors: | XU Yong-fu WANG Chi HUANG Ming XU Jie YANG Lei |
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| Affiliation: | 1. Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China, 2. Road Administration Bureau of Taizhou City, Taizhou 225300, China |
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| 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. |
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| Keywords: | saturated silty soil subgrade sinking of DCM column thixotropy excess pore water pressure |
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