岩基地区CFG桩复合地基工作性状试验研究与机理分析

doi:10.11799/ce201507041

煤炭工程 ›› 2015, Vol. 47 ›› Issue (7): 127-129.doi: 10.11799/ce201507041

岩基地区CFG桩复合地基工作性状试验研究与机理分析

高洪俊¹,刘春原¹,²,申彦利²,³

1. 河北工业大学土木工程学院
2.
3. 河北工程大学土木工程学院

收稿日期:2014-06-10 修回日期:2014-12-09 出版日期:2015-07-10 发布日期:2015-07-15
通讯作者: 高洪俊 E-mail:ghj333@eyou.com
基金资助:
国家自然科学基金

Research on the behavior of CFG pile composite foundation in batholith region

Received:2014-06-10 Revised:2014-12-09 Online:2015-07-10 Published:2015-07-15

摘要/Abstract

摘要： 桩端位于基岩CFG桩复合地基工作性状不同于其他地区。通过现场静载荷试验确定岩基地区19根CFG桩复合地基荷载-沉降曲线，分析了岩基地区不同桩长情况下复合地基沉降变化及荷载传递机理。结果表明，桩端位于基岩CFG桩复合地基沉降量较小，长桩桩端阻力的发挥具有一定的滞后性，短桩呈现出明显的端承性。基于现有试验成果提出了岩基地区CFG桩复合地基沉降的二阶段模型。

关键词: CFG桩复合地基, 端承性, 桩侧摩阻力, 岩基地区, 二阶段模型

Abstract: The working traits of rigid pile composite foundation in batholith region is different from other region. Load-settlement curve of 19 CFG piles composite foundation is confirmed through the site load test and load transfer mechanism of the composite foundation with different piles length is discussed in this paper. The test results indicate that the settlement is small and long pile base resistance has certain hysteresis while short pile with significant end-bearing capacity. The settlement ideal model of CFG piles composite foundation in batholith region is proposed based on existing research results. The research can supply the design basis of CFG pile composite foundation in the batholith region which has bigger engineering practical value.

Key words: CFG pile composite foundation, end-baring, shaft resistance, batholith region, work traits

中图分类号:

TU437.1

范冀哲，王晓磊，任立龙，等. 岩基地区CFG桩复合地基工作性状试验研究与机理分析[J]. 煤炭工程, 2015, 47(7): 127-129.

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参考文献

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岩基地区CFG桩复合地基工作性状试验研究与机理分析

Research on the behavior of CFG pile composite foundation in batholith region

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