浅议桥梁灌注桩施工工艺及检测.doc

浅议桥梁灌注桩施工工艺及检测 摘要:近年来，随着桥梁工程的兴起，施工技术不断与时俱进，其中灌注桩的运用起到了决定性作用，灌注桩具有很强的抗震功能，还能适应各种地质，没有复杂的工序，承载能力强大。灌注桩属于隐蔽工程,钻孔灌注桩的施工过程大部分在水下进行,施工过程难以观察,成桩后不能进行开挖验收,只能利用声测和动测来检验。在施工过程中影响灌注桩施工的因素很多,施工过程中容易出现钻孔偏移、坍孔、导管堵塞、钢筋笼变形、断桩等问题。所以对施工过程的每一个环节都必须严格要求,并且考虑到各种影响因素。结合桥梁灌注桩施工中容易出现的质量事故,介绍了桥梁灌注桩施工工艺和检测方法。关键词：桥梁；灌注桩；处理措施 关键词:桥梁灌注桩;质量事故施工工艺;质量控制;检测 Abstract: in recent years, with the rise of the bridge engineering, construction technology constantly keep pace with The Times, including the use of filling pile played a decisive role and piles of strong earthquake function, and can adapt to all kinds of geology, there are no complicated process, carrying capacity is strong. Filling pile belong to take cover engineering, bored pile construction process of most of the underwater, difficult to observe the construction process, after the excavation pile can not carry out inspection, must use the sound and the dynamic measurement to the inspection. In the construction process of many factors affect filling pile construction, construction process prone to drilling migration, slumping hole, tube jam, steel cage breaking pile deformation, etc. So for the construction of every link must strict requirement, and consider all sorts of factors. Combined with the construction bridge piles easily appeared quality accident, this paper introduces the construction technology and the bridge piles detection methods. Keywords: bridge; Filling pile; Processing measures Keywords: bridge piles; Quality accident construction technology; Quality control; detection 中图分类号：K928.78文献标识码：A 文章编号： 1 桥梁灌注桩施工中的质量事故 根据成孔方法的不同，灌注桩分为钻孔灌注桩、套管成孔灌注桩、爆扩成孔灌注桩及人工挖孔灌注桩等。随着施工技术的逐步完善，灌注桩是各施工单位普遍采用的一种方式，因为它具有一定的承载能力。由于在施工过程中灌注桩都是在地面底下完成作业的，不能对作业的内容进行观察测量，对于施工结束后的工程质量监督也不能进行挖掘检验。如果因为施 工技术采用不合理就会出现桩基断裂、管道堵塞、泥浆被夹、蜂窝、没有灌满等可能发生的质量问题。所以，在灌注桩施工过程中一定要合理有效地选择施工技术，确保灌注桩的施工安全和工程质量，使灌注桩能够达到优良水准。桥梁工程灌注桩的质量关乎于整体结构的使 用周期以及安全性能，它是确保整个桥梁工程的重要施工环节。 2施工工艺 施工单位的施工质量是决定工程质量的关键因素,要保证灌注桩的施工质量,就必须要注重施工过程中使用的工艺和质量控制措施。 2.1钻孔 按