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塑料套管混凝土桩承载试验及沉降计算方法研究

齐昌广, 刘汉龙, 陈永辉, 刘干斌, 左殿军

齐昌广, 刘汉龙, 陈永辉, 刘干斌, 左殿军. 塑料套管混凝土桩承载试验及沉降计算方法研究[J]. 岩土工程学报, 2016, 38(12): 2302-2308. DOI: 10.11779/CJGE201612020
引用本文: 齐昌广, 刘汉龙, 陈永辉, 刘干斌, 左殿军. 塑料套管混凝土桩承载试验及沉降计算方法研究[J]. 岩土工程学报, 2016, 38(12): 2302-2308. DOI: 10.11779/CJGE201612020
QI Chang-guang, LIU Han-long, CHEN Yong-hui, LIU Gan-bin, ZUO Dian-jun. Bearing capacity tests and settlement calculation method of plastic tube cast-in-place concrete pile[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(12): 2302-2308. DOI: 10.11779/CJGE201612020
Citation: QI Chang-guang, LIU Han-long, CHEN Yong-hui, LIU Gan-bin, ZUO Dian-jun. Bearing capacity tests and settlement calculation method of plastic tube cast-in-place concrete pile[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(12): 2302-2308. DOI: 10.11779/CJGE201612020

塑料套管混凝土桩承载试验及沉降计算方法研究  English Version

基金项目: 浙江省自然科学基金青年基金项目(LQ15E080002); 国家自然科学基金青年科学基金项目(51508282)
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。

Bearing capacity tests and settlement calculation method of plastic tube cast-in-place concrete pile

  • 摘要: 塑料套管混凝土桩(TC桩)是由预先打设在地基中的塑料套管内浇注混凝土组成的,适用于软土地基处理工程中,具有承载力高、施工速度快和成桩质量可靠等优点。通过TC桩承载力的模型和现场试验,研究了TC桩的工作性状,并考虑到路堤柔性荷载下刚性桩复合地基桩土存在沉降差,分别采用Mindlin应力解计算塑料套管桩群在复合地基中产生的附加应力,采用Boussinesq解计算地基土荷载产生的附加应力,叠加塑料套管桩群桩和地基土产生的附加应力,采用分层总和法计算复合地基沉降量。研究结果表明:TC桩承载力具有明显的时效性,其不同间歇期的承载特性有显著差别;所建立的TC桩沉降计算方法的计算值与实测值相一致。
    Abstract: The plastic tube cast-in-place concrete pile (TC pile), which is suitable for soft ground treatment, is comprised of pre-driven plastic tube filled with concrete, which has the advantages of high bearing capacity, fast construction speed and reliable pile quality etc. According to the model and in-situ tests on bearing capacity of TC piles, the working behaviors of TC piles are investigated. Taking into account the pile-soil settlement difference of rigid pile composite foundation under embankment load, the additional stresses generated by pile groups and foundation soils are separately computed by using the Mindlin stress solution and the Boussinesq solution. The two kinds of stresses are added together, and the settlement of composite foundation is calculated by using the layer-wise summation method. The results show that the bearing capacity ofTC piles exhibits obvious, time-dependent behaviors, however, there are significantly different bearing behaviors in different intermissions, and the calculated results of settlements of TC piles agree well with the measured data.
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    [2] 齐昌广, 刘干斌, 陈永辉, 等. 塑料套管管侧前注浆桩承载特性的现场试验研究[J]. 岩土力学, 2015, 36(8): 2377-2385, 2394. (QI Chang-guang, LIU Gan-bin, CHEN Yong-hui, et al. Field testing on the bearing characteristics of plastic tube cast-in-place concrete pile with shaft pre- grouting[J]. Rock and Soil Mechanics, 2015, 36(8): 2377-2385, 2394. (in Chinese))
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    [4] QI C G, CHEN Y H, ISKANDER M. Field load tests on plastic tube cast-in-place concrete piles[J]. Proceedings of the Institution of Civil Engineers-Ground Improvement, 2016, 169(GI1): 9-21.
    [5] CHEN Y H, QI C G, XU H Y, et al. Field test research on embankment supported by plastic tube cast-in-place concrete piles[J]. Geotechnical and Geological Engineering, 2013, 31(4): 1359-1368.
    [6] 陈永辉, 齐昌广, 王新泉, 等. 塑料套管混凝土桩单桩承载特性研究[J]. 中国公路学报, 2012, 25(3): 51-59. (CHEN Yong-hui, QI Chang-guang, WANG Xin-quan, et al. Research on bearing performance of plastic tube cast-in-place single pile[J]. China Journal of Highway and Transport, 2012, 25(3): 51-59. (in Chinese))
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出版历程
  • 收稿日期:  2015-10-12
  • 发布日期:  2016-12-24

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