| 长短组合桩复合地基承载力特性研究 |
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| 引用本文： | 何广龙.长短组合桩复合地基承载力特性研究[J].公路,2012(1):13-18. |
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| 作者姓名： | 何广龙 |
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| 作者单位： | 朔州高速公路建设管理处 朔州市036900 |
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| 基金项目： | 山西省交通建设科技项目 |
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| 摘 要： | 近年来,长短组合桩复合地基在地基处理技术中的应用越来越广泛。通过FLAC3D建立CFG桩-石灰桩复合地基数值分析模型,分析了不同的桩长、桩径以及褥垫层厚度等工况下多元复合地基沉降以及桩土应力比的变化规律。分析结果表明,相对于石灰桩而言,CFG桩的桩长以及桩径对复合地基的沉降以及桩土应力比的影响要更为明显;褥垫层能够显著地降低桩土应力比,减弱CFG桩桩顶的应力集中现象,并且存在着一个最佳的厚度。
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| 关 键 词： | 长短组合桩 复合地基 褥垫层 沉降 桩土应力比 |
A Study on Bearing Capacity Behavior of Long-Short Piles Composite Foundation |
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| HE Guang-long.A Study on Bearing Capacity Behavior of Long-Short Piles Composite Foundation[J].Highway,2012(1):13-18. |
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| Authors: | HE Guang-long |
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| Institution: | HE Guang-long(Shouzhou Highway Construction and Management Office,Shouzhou 036900,China) |
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| Abstract: | The technique of long-short piles composite foundation has been wildly used in the ground improvement in recent years.In this paper,a model of CFG-lime piles composite foundation is established using the software FLAC3D.The settlement of composite foundation and the pile-soil stress ratio with different pile length,pile diameter and thickness of cushion are studied.The results show that the length and diameter of CFG piles exert a more significant influence on the settlement of composite foundation and the pile-soil stress ratio than that of lime piles.In addition,the cushion can decrease the pile-soil stress ratio effectively,thus ease the stress concentration on the head of CFG pile;there exists an optimum thickness of cushion. |
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| Keywords: | long-short piles composite foundation cushion settlement pile-soil stress ratio |
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