Experimental study on vertical pullout capacity of cast-in-site pile in permafrost region

SUN Xue-xian; ZHANG Hui; TIAN Ming

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Experimental study on vertical pullout capacity of cast-in-site pile in permafrost region

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- Experimental study on vertical pullout capacity of cast-in-site pile in permafrost region
- Vol. 28, Issue 10, (2007)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU473.1+1
- Online First：15 October 2013，
  
  Published：2007
- 稿件说明：
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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]. 2007, 28(10).
DOI：

SUN Xue-xian, ZHANG Hui, TIAN Ming. Experimental study on vertical pullout capacity of cast-in-site pile in permafrost region[J]. 2007, 28(10). DOI：

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。

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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