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| 砂泥岩地基大直径灌注桩竖向承载力试验研究 | |
| 引用本文： | 杨慧,曹平,江学良,付军.砂泥岩地基大直径灌注桩竖向承载力试验研究[J].防灾减灾工程学报,2009,29(5):549-554. |
| 作者姓名： | 杨慧 曹平 江学良 付军 |
| 作者单位： | 1. 中南大学资源与安全工程学院,长沙,410083 2. 中南大学资源与安全工程学院,长沙,410083;湖南城市学院土木工程学院,湖南益阳,413000 3. 西南电力设计院,成都,610021 |
| 基金项目： | 湖南自然科学基金项目，高等学校博士点学科专项基金项目 |
| 摘 要： | 以某电厂桩基础为工程依托,进行了两试桩竖向静载荷试验,探讨了砂泥岩地基大直径灌注桩的荷载传递机理和竖向承载特性。试验结果表明,砂泥岩地基大直径灌注桩在极限荷载作用达到稳定的情况下,荷载由桩侧阻力与桩端阻力共同承担,但表现出很强的摩擦桩特征,桩侧阻力的发挥取决于桩土相对位移,对于不同的土层,桩侧摩阻力达到极限时所对应的桩土之间相对位移不尽相同。针对试验结果,根据上部结构对基础沉降的要求,以桩顶沉降量来控制桩的竖向承载力,并提出了简化的计算公式,该公式考虑了桩土相对位移对桩侧阻力发挥的影响。 |
| 关 键 词： | 砂泥岩地基 大直径灌注桩 竖向承载性状 载荷试验 |
Tests on Vertical Load Bearing Capacity of Large-Diameter Filling Piles in Soils of Mudstone and Sandstone |
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| YANG Hui,CAO Ping,JIANG Xue-liang,FU Jun.Tests on Vertical Load Bearing Capacity of Large-Diameter Filling Piles in Soils of Mudstone and Sandstone[J].Journal of Disaster Prevent and Mitigation Eng,2009,29(5):549-554. | |
| Authors: | YANG Hui CAO Ping JIANG Xue-liang FU Jun |
| Institution: | YANG Hui1,CAO Ping1,JIANG Xue-liang1,2,FU Jun3 (1.School of Resource and Safety Engineering,Central South University,Changsha 410083,China,2.School of Civil Engineering,Hunan City University,Yiyang 413000,3.Southwest Electric Power Design Institute,Chengdu 610021,China) |
| Abstract: | Based on the field testing results of two large-diameter filling piles in soils of sandstone and mudstone under a power plant,the load transfer mechanism and vertical load bearing behavior of the piles are discussed.The analysis shows that the piles mainly behave as frictional ones and their vertical load bearing capacity is mainly provided by side frictional resistance.A method is presented for identification of the axial load bearing capacity of large-diameter filling piles in soils of sandstone and mudst... |
| Keywords: | soils of sandstone and mudstone large-diameter filling piles vertical load bearing behavior loading test |
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