| 多年冻土区灌注桩竖向抗拔承载力试验研究 |
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| 引用本文： | 孙学先,张慧,田明.多年冻土区灌注桩竖向抗拔承载力试验研究[J].岩土力学,2007,28(10):2110-2114. |
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| 作者姓名： | 孙学先 张慧 田明 |
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| 作者单位： | 1. 兰州交通大学 土木工程学院，兰州 730070；2. 辽宁省交通勘测设计院，沈阳 110005 |
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| 基金项目： | 铁道部科技教育司资助项目 |
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| 摘 要： | 为研究多年冻土区桥梁及建筑物桩基抗冻拔的能力和变形性质，结合青藏铁路试验段工程，对青藏高原高温细颗粒多年冻土区钻孔灌注扩底桩和直孔桩现场抗拔力试验进行了研究，得到了两种桩型在同一地质和地温条件下的抗拔承载力及变形的试验结果。依据地温测试资料的分析，给出了桩-土体系回冻时间及地温变化特征。研究成果可为类似条件下抗冻拔桩基础设计与施工提供参考。
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| 关 键 词： | 多年冻土 抗拔灌注桩 地温 试验研究 |
| 文章编号： | 1000-7598-（2007）10-2100-05 |
| 收稿时间： | 2006-03-10 |
| 修稿时间： | 2006-03-10 |
Experimental study on vertical pullout capacity of cast-in-site pile in permafrost region |
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| SUN Xue-xian,ZHANG Hui,TIAN Ming.Experimental study on vertical pullout capacity of cast-in-site pile in permafrost region[J].Rock and Soil Mechanics,2007,28(10):2110-2114. |
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| Authors: | SUN Xue-xian ZHANG Hui TIAN Ming |
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| Institution: | 1.School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;2.Liaoning Provincial Communications Survey & Design Institute, Shenyang 110005, China |
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| Abstract: | In order to research the frost heaving resistance and deformation characters of pile foundations for bridges and buildings in permafrost region,based on the test projects of Qinghai-Tibet railway,the uplift tests of the cast-in-site bored pedestal pile and column bored pile have been studied in high-temperature fine-grained permafrost of Qinghai-Tibet plateau.The test results of uplift resistance and deformation are gained for the two different types of piles under the same geological condition and temperature.In addition,according to the ground temperature data,the back frost time of pile-soil system and the characters of ground temperature change are given.The investigation could be used as references in the design and construction of frost pulling-resistant pile under the similar conditions. |
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| Keywords: | permafrost uplift bored pile ground temperature experimental study |
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