基于不同后注浆方法的桥梁桩基沉降分析

发布时间：2018-01-13 00:26

  本文关键词：基于不同后注浆方法的桥梁桩基沉降分析　出处：《建筑技术》2017年03期 　论文类型：期刊论文

  更多相关文章： 堆载法 后注浆 沉降 荷载-沉降曲线

【摘要】：采用慢速维持荷载堆载法,分析采用3种不同后注浆条件(桩端注浆,桩侧注浆,联合注浆)及未注浆条件的桩基沉降特性,结果表明桩基采用后注浆能有效控制桩基桩顶沉降;与未注浆桩相比,桩端注浆桩可减少沉降0.86mm,桩侧注浆桩可减少沉降1.32mm,联合注浆桩可减少沉降1.42mm;采用后注浆后,桩基荷载-沉降曲线近似为直线,其极限荷载较未注浆有较大提高。
[Abstract]:The settlement characteristics of pile foundation under three different post-grouting conditions (pile end grouting, pile side grouting, combined grouting) and non-grouting conditions were analyzed by slow maintenance load surcharge method. The results show that post-grouting can effectively control the settlement of pile top. Compared with the non-grouting pile, the pile end grouting pile can reduce the settlement by 0.86mm, the pile side grouting pile can reduce the settlement by 1.32mm, the combined grouting pile can reduce the settlement by 1.42 mm. After post-grouting, the load-settlement curve of pile foundation is approximately straight line, and the ultimate load of pile foundation is much higher than that of non-grouting.
【作者单位】： 武汉科技大学资源与环境工程学院;中南大学土木工程学院;
【基金】：国家重点基础研究发展计划(2013CB036004)
【分类号】：U443.15
【正文快照】： 在软土地区,桥梁桩基后注浆是土体加固技术与■技术的有机结合,通过朦不但可固^?沉渣和桩侧泥皮,还可加固_和桩侧一定范围内的土体,从而大幅度提高桩侧阻力和桩端阻力,缩短桥梁桩基静置时间。目前后注堓方法已广泛采用,以解决软土躯桥梁桩基承载力不足及工后沉降过大等问题[1_，

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