后压浆技术在某工程中应用与分析

发布时间：2018-03-20 13:37

本文选题：钻孔灌注桩　切入点：泥浆护壁　出处：《河北工程大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来,我国的桩基工程走上了快速发展的道路,为了适应不同的地质土层,桩的施工类型以及施工工艺,如雨后春笋越来越多,施工工序越来越复杂。目前,钻孔灌注桩在各类建筑、交通、港口等行业中应用最为广泛。其具有噪声小、安全性高、适应力强和对周围建筑物影响小等优点。随着建筑物发展多元化,灌注桩也向超深度、大直径、承载力大的方向发展,施工难度也在逐渐的加大,与此同时,一些工程质量和安全问题也接踵而至,造成直接或者间接地经济损失。因此,为了减少问题,降低损失,需要对钻孔灌注桩施工技术进行深入研究、对施工细节优化,避免今后在施工中出现同类的质量问题。本文首先对桩基成孔过程中的质量缺陷问题,施工注意事项,桩身质量问题进行介绍,对后压浆对解决承载力不足和桩底沉渣问题进行分析。然后利用ANSYS软件对压浆前后桩底的应力值对比分析,得出压浆可以提高桩基承载力,而且阐明后压浆技术解决桩底沉渣和承载力不足问题。最后结合福建天汇石化物流有限公司一期工程桩基实际工程中泥浆护壁钻孔灌注桩的施工过程,对后压浆的作用机理,施工工艺,压浆过程出现的问题和应对措施,以及通过对压浆参数和检测效果的分析,阐述其不仅保证受力安全而且还在节约经济方面有着优越性和有效性,对今后的同类型桩基的施工提供指导和意见。
[Abstract]:In recent years, pile foundation engineering in China has been on the way of rapid development. In order to adapt to different geological soil layers, pile construction types and construction techniques, such as more and more bamboo shoots, construction process is becoming more and more complex. Bored cast-in-place pile is most widely used in construction, traffic, port and other industries. It has the advantages of low noise, high safety, strong adaptability and little influence on the surrounding buildings. With the development of large diameter and large bearing capacity, the construction difficulty is gradually increasing. At the same time, some engineering quality and safety problems also follow, causing direct or indirect economic losses. Therefore, in order to reduce the problems and reduce the losses, It is necessary to study deeply the construction technology of bored cast-in-place pile, optimize the construction details, and avoid the similar quality problems in the construction in the future. This paper introduces the quality problems of pile body, analyzes the problem of post-grouting to solve the problem of insufficient bearing capacity and sediment on the bottom of pile, then compares the stress values of pile bottom before and after grouting with ANSYS software, and concludes that grouting can improve the bearing capacity of pile foundation. At last, combined with the construction process of drilling pile pile foundation in the first phase of Fujian Tianhui Petrochemical Logistics Co., Ltd., the mechanism of the effect on the post-grouting pile is discussed, which is based on the construction process of the bored bored pile with mud wall protection in the first stage project of Fujian Tianhui Petrochemical Logistics Co., Ltd. The construction technology, the problems in the grouting process and the corresponding measures, as well as the analysis of the grouting parameters and the effect of the testing, are discussed, which not only guarantee the safety of the force but also have the advantages and effectiveness in economizing the economy. To provide guidance and advice for the construction of the same type of pile foundation in the future.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU753.3

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