塑料套管混凝土桩的承载力时间效应研究

齐昌广; 陈永辉; 王新泉; 刘干斌

doi:10.11779/CJGE201509010

塑料套管混凝土桩的承载力时间效应研究 English Version

1. 宁波大学建筑工程与环境学院,浙江宁波 315211; 2. 河海大学岩土工程科学研究所,江苏南京 210098; 3. 浙江大学城市学院土木工程系,浙江杭州 310015

基金项目: 浙江省自然科学基金青年基金项目（LQ15E080002）; 国家; 自然科学基金面上项目（51178160,51478228）; 国家自然科学基金; 青年项目（51508282,51308497）

详细信息

作者简介:
齐昌广(1986-),男,博士,讲师,主要从事基础工程、地基处理和透明土物理模拟试验等方面的研究。E-mail: qichangguang@163.com。

通讯作者:
王新泉

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出版历程
- 收稿日期: 2014-09-09
- 发布日期: 2015-09-17

Time effect of bearing capacity of plastic tube cast-in-place concrete piles

1. Faculty of Architectural, Civil Engineering and Environment, Ningbo University, Ningbo 315211, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China; 3. Department of Civil Engineering, City College, Zhejiang University, Hangzhou 310015, China

摘要

摘要: 在塑料套管混凝土桩（TC桩）成桩机理的基础上,采用圆柱扩孔回缩理论和径向固结理论预测TC桩施工引起的桩周土超净孔压的消散,建立了TC桩承载时效的理论计算方法。通过开展现场试验,对比研究了TC桩承载时效理论的合理性。结果表明：考虑桩周土的回缩的承载时效计算结果及其随时间变化的规律与实测值相吻合;而不考虑回缩时,不同休止期对应的承载力将被高估160%~300%。
- 塑料套管混凝土桩 /
- 时间效应 /
- 圆柱扩孔和回缩 /
- 径向固结 /
- 现场试验
Abstract: Based on the installation mechanism of plastic tube cast-in-place concrete piles (TC pile), the method for time effect of bearing capacity of TC pile was established by employing both of the theories of cylindrical cavity expansion and contraction and radial consolidation. According to the field tests, the rationality of the time-effect theory for TC pile was comparatively studied. The results show that the calculated values of bearing capacities with time by considering the contraction of soils surrounding the TC pile shaft are consistent with the measured ones. However, the calculated values in different rest periods will be overestimated by 160%~300% compared with the measured ones as the contraction of soils is ignored.
- plastic tube cast-in-place concrete pile /
- time effect /
- cylindrical cavity expansion and contraction /
- radial consolidation /
- field test

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参考文献(30)

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