| 桩-岩摩擦黏着特性的试验与分析 |
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| 引用本文： | 宋兵,蔡健.桩-岩摩擦黏着特性的试验与分析[J].岩土力学,2011,32(8):2313-2318. |
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| 作者姓名： | 宋兵 蔡健 |
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| 作者单位： | 1. 华南理工大学土木工程系,广州510063;广州市建筑科学研究院,广州510440
2. 广州市建筑科学研究院,广州,510440 |
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| 基金项目： | 国家自然科学基金资助项目(No.50878087) |
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| 摘 要： | 研究桩与岩石的侧摩阻力组成及影响因素,有助于准确地把握桩与岩石的侧摩阻力取值原则。在对桩与岩层的摩擦黏着机制分析的基础上,指出界面力与岩层抗剪力的区别,并提出岩层的极限侧摩阻力由界面强度及岩石强度两者较弱一方决定的观点。进行了中风化岩中4组混凝土短桩的抗压及抗拔极限摩阻力对比试验,获得了相应的极限侧摩阻力值以及抗拔与抗压极限侧摩阻力值的比值。抗拔时由于上部岩层对桩侧岩层的约束作用较弱,会使侧摩阻力相对抗压时有较大降低。通过有限元计算及其与试验值的比较分析,研究短桩与岩层的界面强度条件,发现岩层和混凝土灌注桩间的侧摩阻力中界面黏着力占很大比例。
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| 关 键 词： | 桩 桩-岩侧摩阻力 黏着力 摩擦力 有限元分析 |
| 收稿时间： | 2010-09-05 |
Test and analysis of friction and adhesive characters of pile and rock |
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| SONG Bing,CAI Jian.Test and analysis of friction and adhesive characters of pile and rock[J].Rock and Soil Mechanics,2011,32(8):2313-2318. |
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| Authors: | SONG Bing CAI Jian |
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| Institution: | 1. Department of Civil Engineering, South China University of Technology, Guangzhou 510063, China; 2. Guangzhou Institute of Building Science, Guangzhou 510440, China |
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| Abstract: | To determine the side rock resistance of pile more accurately,the composing and the influence factor of it need to be researched.The mechanism of friction and adhesion between pile and rock is analyzed.It is pointed out that pile-rock interface strength is different from rock shearing resistance;the ultimate side rock resistance of pile is determined by the weak one between pile-rock interface strength and rock strength.Four groups of compression and uplift comparative tests for concrete short piles in medi... |
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| Keywords: | pile side rock resistance of pile adherence friction finite element analysis |
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