钻孔灌注桩水下混凝土配合比设计及施工工艺研究

发布时间：2018-05-21 08:21

本文选题：钻孔灌注桩 + 配合比设计　；参考：《郑州大学》2017年硕士论文

【摘要】：钻孔灌注桩是桥涵工程中桩基础的一种形式,在桥涵工程中应用广泛。它具有承载能力好、施工作业方便、设备简单、操作程序化的优点,近些年来,在我国得到了广泛的应用。桩基工程造价高,完工后修复困难,所以有必要对钻孔灌注桩的混凝土配合比设计和施工工艺进行深入的研究,提出施工过程中的质量控制措施,以达到工程顺利完成的目的。本文以钻孔灌注桩水下混凝土的配合比设计和具体施工工艺作为切入点,结合实际工程案例,对钻孔灌注桩进行详细介绍。第二章介绍混凝土配合比设计方法,包括各种影响因素对配合比的具体影响,最后进行配合比的实例研究。第三章结合试验数据,对灌注桩混凝土进行优化设计,阐述粉煤灰对混凝土配合比优化方面的重要作用。第四章介绍灌注桩施工工艺,从郑民高速某段灌注桩实际案例出发,详细介绍钻孔灌注桩施工的整个流程,对混凝土成孔和灌注中出现的问题进行探讨。钻孔灌注桩施工工序较多,每一道工序的施工都必须认真严格的进行,每道工序之间的衔接尤为重要。通过对本文上述问题的研究,可以使施工进程科学规范,同时可以加强施工质量,降低安全风险,提高经济效益,为我们的日常工作提供指导和理论依据。
[Abstract]:Bored pile is a form of pile foundation in bridge and culvert engineering and is widely used in bridge and culvert engineering. It has the advantages of good carrying capacity, convenient construction, simple equipment and programmed operation. In recent years, it has been widely used in China. The construction cost of pile foundation is high and it is difficult to repair it after completion, so it is necessary to deeply study the design of concrete mixture ratio and construction technology of bored pile, and put forward the quality control measures in the construction process so as to achieve the purpose of the successful completion of the project. In this paper, the proportion design and concrete construction technology of underwater concrete of bored pile are taken as the starting point. Combined with practical engineering cases, the paper introduces the bored pile in detail. The second chapter introduces the concrete mix proportion design method, including the concrete influence of various factors on the mix ratio, and finally carries on the concrete mix proportion example research. The third chapter combines the test data to optimize the concrete design of cast-in-place pile, and expounds the important role of fly ash in the optimization of concrete mix ratio. The fourth chapter introduces the construction technology of cast-in-place pile, starting from the actual case of a certain section of Zhengmin high speed cast-in-place pile, introduces the whole process of bored pile construction in detail, and probes into the problems in the formation of concrete hole and in pouring. There are many construction procedures of bored pile, so the construction of each procedure must be carried out seriously and strictly, and the connection between each process is particularly important. Through the study of the above problems in this paper, we can make the construction process scientific and standard, at the same time, we can strengthen the construction quality, reduce the safety risk, increase the economic benefit, and provide the guidance and theoretical basis for our daily work.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U445.551

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