桩端后压浆在七浦塘大桥桩基中的试验研究  

Experimental research on pile-base post-grouting piles of qiputang bridge

作　　者：王红伟[1] 戴国亮[1] 龚维明[1] 

机构地区：[1]东南大学土木工程学院,江苏南京210096

出　　处：《水运工程》2009年第12期189-193,共5页Port & Waterway Engineering

基　　金：国家科技支撑计划(2008BAG07B01);江苏省基础研究项目(BK2007114)

摘　　要：结合七浦塘大桥一根试桩压浆前后的应力测试结果,对比分析了桩端后压浆对桩端阻力和桩侧摩阻力发挥特性的影响,得出"桩端后压浆能够大幅度提高桩端阻力,同时对桩端以上20m范围内各桩段侧摩阻力提高程度也达42.32%～79.25%"的结论。研究成果直接用于七浦塘大桥桩基设计,同时为类似桩基设计施工提供参考。Based on the results of stress tests for one pile of Qiputang Bridge, we analyzed comparatively the influence on exertion of side resistance and end resistance. The results show that the post-grouting of pile end can highly enhance the end resistance and the side resistance of each paragraph-pile in the scope of more than 20 m above the pile end can improve the level of 42.32%-79.25% at the same time. The research results were applied in the design of piles of Qiputang Bridge. It can also provide reference for design and construction of similar piles.

关 键 词：应力测试 桩端后压浆 侧摩阻力 端阻力 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]