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| DX旋挖挤扩灌注桩在LNG储存罐中的应用 | |
| 引用本文： | 贺德新,张成伟,郑建华,贺建彤,张新生.DX旋挖挤扩灌注桩在LNG储存罐中的应用[J].中国工程科学,2012,14(1):19-25. |
| 作者姓名： | 贺德新 张成伟 郑建华 贺建彤 张新生 |
| 作者单位： | 1. 北京中阔地基基础技术有限公司,北京,100097 2. 中石油江苏液化天然气有限公司,江苏南通,226001 3. 中国寰球工程公司,北京,100029 |
| 摘 要： | 针对场地上部为吹填海砂、下部为粉砂的特殊地层条件，在储存罐的基础中采用了普通直孔灌注桩和三节DX旋挖挤扩灌注桩；通过现场自平衡载荷试验，判定桩的竖向抗压极限承载力和沉降量，分析桩的载荷传递机理，并对桩侧阻力、桩端阻力的分配和发展规律进行研究；同时通过对两种桩的试验结果进行对比，发现DX挤扩灌注桩的极限承载力、桩身沉降明显优于普通直孔灌注桩，而且DX桩的长度明显小于直孔桩。 |
| 关 键 词： | DX旋挖挤扩灌注桩 桩侧阻力 桩端阻力 极限承载力 沉降 |
| 收稿时间： | 2011/11/15 0:00:00 |
| 修稿时间： | 2011/11/21 0:00:00 |
The application of DX piles in the LNG storage tanks |
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| He Dexin,Zhang Chengwei,Zheng Jianhu,He Jiantong and Zhang Xinsheng.The application of DX piles in the LNG storage tanks[J].Engineering Science,2012,14(1):19-25. | |
| Authors: | He Dexin Zhang Chengwei Zheng Jianhu He Jiantong and Zhang Xinsheng |
| Affiliation: | Beijing Zhongkuo Foundation Technology Co., Ltd, Beijing 100097, China;;Petro China Company Limited, Jiangsu LNG Project, Nantong, Jiangsu 226001, China;;China Huanqiu Contracting & Engineering Corporation, Beijing 100029, China;Beijing Zhongkuo Foundation Technology Co., Ltd, Beijing 100097, China;;Beijing Zhongkuo Foundation Technology Co., Ltd, Beijing 100097, China; |
| Abstract: | In this paper, considering the special field with hydraulic fill sand in upper soil layer and fine sand in the lower soil, we adopt straight piles and DX piles in foundation of LNG storage tanks; a series of self balanced load tests for piles are conducted. The purpose is to determine the ultimate bearing capacities and settlement of piles, analyze its load transfer mechanism, and study the distribution and development of the skin friction resistances and tip resistances. Comparing DX piles with straight piles, we find that DX piles are superior in ultimate bearing capacities and settlement; at the same time, the length of DX piles can be reduced apparently. |
| Keywords: | DX piles skin friction resistances tip resistances ultimate bearing capacities settlement |
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