| 青藏高原多年冻土区大直径钻孔桩回冻过程研究 |
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| 引用本文： | 王旭,蒋代军,赵新宇,刘德仁.青藏高原多年冻土区大直径钻孔桩回冻过程研究[J].铁道学报,2005,27(2):102-107. |
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| 作者姓名： | 王旭 蒋代军 赵新宇 刘德仁 |
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| 作者单位： | 1. 兰州交通大学,土木工程学院,甘肃,兰州,730070
2. 青藏铁路建设总指挥部,青海,格尔木,816000 |
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| 基金项目： | 铁道部科技开发计划项目(2001G001-C-05);兰州交通大学青蓝工程资助项目 |
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| 摘 要： | 为解决青藏铁路建设过程中不同多年冻土区大直径钻孔灌注桩桩土体系的回冻问题,认识钻孔桩成桩后对桩周多年冻土层地温的影响,本文从不同多年冻土区钻孔桩地温实测资料出发,通过对青藏高原多年冻土区与融区过渡带(高温极不稳定区DK1229 540)、高温不稳定多年冻土区(DK1047 000)及低温多年冻土区(DK984 096)3个试验场地实测地温资料的对比分析,得出青藏高原不同多年冻土区大直径钻孔灌注桩回冻过程的差异,从而可以为不同冻土区钻孔桩的后续施工提供技术支持。
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| 关 键 词： | 多年冻土 钻孔灌注桩 地温测试 回冻过程 |
| 文章编号： | 1001-8360(2005)02-0102-06 |
| 修稿时间： | 2004年1月9日 |
Study on Refreezing Processes of Large Diameter Bored Pile in Permafrost Area of the Qinghai-Tibet Plateau |
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| WANG Xu,JIANG Dai-jun,ZHAO Xin-yu,LIU De-ren.Study on Refreezing Processes of Large Diameter Bored Pile in Permafrost Area of the Qinghai-Tibet Plateau[J].Journal of the China railway Society,2005,27(2):102-107. |
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| Authors: | WANG Xu JIANG Dai-jun ZHAO Xin-yu LIU De-ren |
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| Institution: | WANG Xu~1,JIANG Dai-jun~1,ZHAO Xin-yu~2,LIU De-ren~1 |
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| Abstract: | How to solve and recognize the problem of refreezing of the pile-soil system of large diameter bored piles in different permafrost regions is a key problem in railway construction on the Qinghai-Tibet Plateau. On the basis of the tested ground temperature data, the authors analyzed the refreezing processes in different permafrost regions (called the low temperature region, high temperature unstable region, permafrost and thawing transition zone) and found out their differences. Valuable references are obtained in support of late-stage construction of bored pile foundations in different permafrost regions. |
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| Keywords: | permafrost cast-in-place bored pile ground temperature testing refreezing process |
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