桩端压力注浆桩的承载性状分析
摘要:灌注桩后注浆工艺能提高桩的承载力、减小变形、增强桩的质量稳定性。根据某工程注浆和未注浆钻孔灌注桩的单桩静载试验的分析与对比,结合试验的荷载位移曲线、桩身轴力分布、桩顶荷载与桩端荷载、桩顶沉降与桩身弹性压缩量等关系,探讨钻孔灌注桩注浆前后桩土体系荷载传递的变化规律和某些影响因素,对了解桩端压力注浆桩的承载性状及类似工程的设计有一定意义。
Abstract:Bored pile with post-grouted can increase bearing capacity, reduce deformation and enhance the quality of pile. In this study, static load tests on four bored piles with post-grouted and one pile without post-grouted were conducted at one construction site. By analyzing Load-settlement curves, axis force distribution of pile shaft, load of pile top and pile end, settlement of pile top over elastic compression of pile, Variation and some factors affected on load transfer of pile-soil system were discussed. This study shows bearing behavior of pile with post-grouted, which have some significance for the design of bored pile.
中文标题：
桩端压力注浆桩的承载性状分析
Analysis on Bearing Behavior of Pile With Post-grouted
作者：
朱德昌
Zhu Dechang
作者简介:朱德昌,1964年生,男,福建福州人,注册土木工程师(岩土),高级工程师,主要从事桩基检测和岩土工程勘察工作。E-mail:fadigeot@126.com
通讯地址：
福州市建筑设计院,福建福州 350001
FuzhouArchitectureDesignInstitute,Fuzhou350001,Fujian,China
中图分类号:TU473.1
doi:10.3969/j.issn.1007-2993.2011.05.009
出版物：岩土工程技术
收稿日期:2011-07-25
关键词:灌注桩,后注浆,静载试验,荷载传递,长径比
Key words:bored pile,post-grouting technique,static load test,load transfer,length-to-diameter ratio
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