桥梁桩基础钻孔灌注桩施工技术

J 中国学术期刊网.qi ka nwang.net浅议桥梁桩基础钻孔灌注桩施工技术摘要：钻孔灌注桩的施工大部分是在水下进行的，其施工过程无法观 察，成桩后也不能进行开挖验收.。施工中任何一个环节出现问题, 都将直接影响到整个工程的质量和进度,甚至给投资者造成巨大的经 济损失和不良的社会影响.因此，要求基础施工队伍在施工技术措施 上要 落实，并加强施工质量管理，密切注意抓好施工过程中每一个环节的 质量,力争将隐患消除在成桩之前.本文结合多年的施工经验并以目 前正在建设的某桥桩基施工为例，对钻孔灌注桩的施工技术进行了探 讨。关键词：钻孔灌注桩；桥梁桩基础；施工abstract: most of the cast-in-place pile construction is carried out under water, the construction process can not be observed, after piling excavation can not be accepted. construction of any part of a problem, will directly affect the quality and schedule of the project, or even give investors a huge economic loss and bad social influence. therefore, requirements of construction team in construction technical measures to implementation, and strengthen the construction of quality management, pay close attention to construction process everyJ 中国学.qi ka nwang.netstep of the quality, and strive to eliminate potential dangers in pile before. this article based on the experience of construction and is currently building a bridge pile foundation construction as an example, the bored piles construction technology is discussed.key words: bored pile; pile foundation; construction中图分类号：u445 文献标识码：a 文章编号：前言在施工前要仔细熟悉设计图纸及有关施工、验收法律规范，核查地质和有 关灌注桩方面的资料，对灌注桩在施工过程中可能发生的一些问题进行分析后制定出施工 质量标准、验收实施方案和每根桩的施工记录，以便有效地对桩基施 工质量加以控制。施工准备工作1）机具的选择目前常用的钻具有旋转钻、冲击钻及冲抓钻 3 种类型。旋转钻主要用于粘质土、砂土、砾、卵石粒径小于钻杆内径 2 /3,含量少于 20% 的碎石土；成孔直径 ...