| 桩端压浆后嵌岩桩的承载性能分析 |
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| 引用本文： | 谢理民,黄生根.桩端压浆后嵌岩桩的承载性能分析[J].桥梁建设,2011(2). |
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| 作者姓名： | 谢理民 黄生根 |
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| 作者单位： | 1. 中铁第四勘察设计院集团有限公司,湖北武汉,430063
2. 中国地质大学(武汉)工程学院,湖北武汉,430074 |
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| 摘 要： | 为研究桩端压浆后嵌岩桩的承载性能,对焦桐高速泌阳段2座桥梁中的2根试桩(Z1,Z2号桩)进行静载试验。静载试验采用自平衡试桩法,采用慢速维持的方式分别对Z1,Z2号桩压浆前、后进行加载,加载分15级进行。试验结果表明:压浆后嵌岩桩的承载力得到明显提高,提高幅度为33%~35.3%,说明在嵌岩桩中应用桩端后压浆技术是可行的,且经济效益非常显著;桩端后压浆技术对嵌岩桩承载性能的影响主要表现在提高桩侧摩阻力,无论嵌岩段或非嵌岩段的桩侧摩阻力均有显著提高。
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| 关 键 词： | 桥梁基础 钻孔灌注桩 嵌岩桩 静载试验 承载力 |
Analysis of Load Bearing Behavior of Base Grouted Socketed Piles |
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| XIE Li-min,HUANG Sheng-gen.Analysis of Load Bearing Behavior of Base Grouted Socketed Piles[J].Bridge Construction,2011(2). |
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| Authors: | XIE Li-min HUANG Sheng-gen |
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| Institution: | XIE Li-min1,HUANG Sheng-gen2(1.China Railway Tiesiyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China,2.Faculty of Engineering,China University of Geosciences,Wuhan 430074,China) |
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| Abstract: | To study the load bearing behavior of base grouted socketed piles,the static load tests were made for the two trial piles(No.Z1 and No.Z2) of two bridges on the Biyang section of Jiaozuo-Tongbai Expressway.The tests were carried out,using the self-balanced load testing method and in the tests,the piles No.Z1 and No.Z2 before and after their bases were grouted were respectively loaded in 15 load levels by way of slow load holding.The results of the tests show that the load bearing capacity of the socketed pi... |
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| Keywords: | bridge foundation bored pile socketed pile static load test load bearing capacity |
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