基于时效性的静压管桩侧阻力计算

王家涛; 张明义

基于时效性的静压管桩侧阻力计算 English Version

王家涛¹,
张明义²

1. 山东水利职业学院建筑工程系,山东日照 276826 ； 2. 青岛理工大学土木工程学院,山东青岛 266033

基金项目: 教育部高等学校博士点基金项目(20093721110002)

详细信息

作者简介:
王家涛 ( 1978 – ) ,男,山东日照人,硕士,讲师,主要从事岩土工程等方面的研究与教学工作。

中图分类号: TU473
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出版历程
- 收稿日期: 2011-08-07
- 发布日期: 2011-12-06

Computation of side resistance of jacked pipe piles based on time effect

WANG Jia-tao¹,
ZHANG Ming-yi²

1. Department of Civil Engineering, Shandong Water Polytechnic, Rizhao 276826, China; 2. Department of Civil Engineering, Qingdao Technology University, Qingdao 266033, China

摘要

摘要: 饱和软黏土地基中的静压管桩隔时复压试验表明,复压起动压桩力增长幅度较大,且前期增长较快而后期较慢。通过分析静压管桩时效机理发现,静压桩的单桩承载力随时间的提高主要来源于桩侧阻力的增长,而桩端阻力变化对承载力的时间效应贡献较小。利用软件对试验数据进行回归分析,得出静压管桩侧阻力随时间增长的关系可以用对数曲线进行模拟的结论,从而为求得不同休止期的静压桩极限承载力提供了一种新方法。与现场试验资料对比分析表明,侧阻力的模型计算值与实测值的变化规律一致,且误差较小,能够满足工程需要。
- 静压管桩 /
- 时效性 /
- 侧阻力 /
- 端阻力 /
- 极限承载力
Abstract: The re-pressed tests on jacked pipe piles in soft clay indicate that the re-pressed starting pressure is greatly improved after finishing the installation and increases more rapidly in early period than in later one. Through the study of the time effect mechanism, it is found that the increment of the ultimate bearing capacity of a single pile is mainly caused by side soil resistance. The end resistance has little influence on the time effect of bearing capacity of the pile. According to the simulated results of the test data, the relationship between pile side resistance and time can be described by use of logarithmic curve. By means of this new computing model, the side frictional resistance in different time of reponse as well as the ultimate bearing capacity can be obtained. It is proved that the prposed method is feasible because the values of side soil resistance calculated by the computing model with software are consistent with the field test results.
- jacked pipe pile /
- time effect /
- side resistance /
- end resistance /
- ultimate bearing capacity

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参考文献(12)

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