| 大直径嵌岩桩承载特性的现场试验分析 |
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| 引用本文： | 邱喜,尹崇清.大直径嵌岩桩承载特性的现场试验分析[J].建筑科学,2009,25(1). |
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| 作者姓名： | 邱喜 尹崇清 |
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| 作者单位： | 1. 重庆交通大学河海学院,重庆,400074
2. 重庆交通大学西南水运工程科学研究所,重庆,400016 |
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| 摘 要： | 嵌岩桩是一种钢筋混凝土现场灌注桩,桩身弹性模量与岩石地基弹性模量相接近,当桩身嵌入岩层后,能牢固地结合成为共同受力的整体结构.通过现场试验(静载荷试验和动测试验)分析,得出嵌岩桩的承载特性:嵌岩灌注桩的荷载传递和破坏特性主要与长径比、覆盖土层性质、嵌岩段的岩性和成桩工艺有关;大部分嵌岩灌注桩属于摩擦型桩;嵌岩灌注桩的嵌岩部分具有较高的侧阻力和端阻力;嵌岩桩的侧阻力与桩土摩阻力都是桩的侧阻力,但二者破坏机制、分布规律完全不同,桩土摩阻力沿桩的深度方向是均匀分布,而嵌岩桩侧阻力则是典型的非线性分布.
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| 关 键 词： | 嵌岩桩 侧阻力 端阻力 嵌岩深度 承载特性 |
Analysis of Field Test on Bearing Capacity Characteristics of Large-Diameter and Rock-Socketed Piles |
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| QIU Xi,YIN Chong-qing.Analysis of Field Test on Bearing Capacity Characteristics of Large-Diameter and Rock-Socketed Piles[J].Building Science,2009,25(1). |
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| Authors: | QIU Xi YIN Chong-qing |
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| Affiliation: | 1.School of River and Ocean Engineering;Chongqing Jiaotong University;Chongqing 400074;China;2.Southwestern Research Institute for Waterway Engineering;Chongqing 400016;China |
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| Abstract: | Rock-socketed pile is a reinforced concrete field grouting pile,the elastic modulus of the pile body is similar to the elastic modulus of rock foundation.After the pile body's is embedded in rock,they can firmly become a whole structure to bear force together.By analysis of field tests of static load and dynamic measuring,it is concluded that load transfer and failure characteristics of the rock-socketed cast-in-place pile is related to length-diameter ratio, properties of overlying soil layer,lithology of ... |
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| Keywords: | rock-socketed pile shaft resistance base resistance socket length bearing characteristic |
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