水泥土搅拌桩桩身强度影响因素及其变化规律研究与应用

发布时间：2018-05-05 04:45

本文选题：水泥土搅拌桩 + 强度　；参考：《长春工程学院》2015年硕士论文

【摘要】：近些年来,随着我国经济建设的快速发展,基础设施建设的规模不断扩大,在沿海软土地基上建造大型构筑物越来越多。但由于软土承载力低,受力后容易造成构筑物的不均匀沉降,从而导致构筑物失稳。因此,对软土地基土的处理就变得越来越有必要。而水泥土搅拌法作为处理软土地基的一种方法,相比较其它方法,能最大限度地的利用原土,同时水泥土搅拌法处理软土地基具有施工简单、费用便宜、加固深度大等优点,越来越受到人们的重视,尤其在海相地层淤泥和淤泥质土中应用越来越广,因此,对水泥土搅拌桩的研究就变得越来越重要,特别是对水泥土搅拌桩桩身强度影响因素的研究,国内很多学者也对其进行了研究,但这些研究缺乏对各种影响因素的系统研究,且缺乏规律性的研究,本文通过对水泥土搅拌桩桩身强度影响因素及其变化规律研究与应用,找出其各个因素对桩身强度的影响规律。这种影响规律,无论对水泥土搅拌桩设计理论,还是对水泥土搅拌桩工程设计及施工指导都具有重要的理论意义和工程应用价值。本文就目前国内外水泥土搅拌桩技术及强度影响因素现状做了详细的归纳总结,同时对水泥土搅拌桩桩身强度影响因素的变化规律进行了理论分析,然后针对湛江地区海相地层淤泥和淤泥质土的特点,以湛江钢铁工程水泥土搅拌桩项目为研究对象,通过大量的室内试验和现场试验,得出了掺入比、养护龄期和含水率对水泥土搅拌桩强度的影响规律,同时定量地对水泥土搅拌桩桩身均匀性进行了判定,根据分析结果总结出,影响水泥土搅拌桩桩身均匀性的决定因素为水泥与土搅拌的均匀性,送浆的均匀性、连续性及搅拌方法的适用性等,实现了综合利用各种因素定量评价判定,为水泥土搅拌桩桩身均匀性判定提供了科学的方法。同时为水泥土搅拌桩的设计与施工提供重要理论依据和实践基础。
[Abstract]:In recent years, with the rapid development of China's economic construction, the scale of infrastructure construction is expanding, and more and more large structures are built on the soft soil foundation in the coastal areas. However, because of the low bearing capacity of the soft soil, the uneven settlement of the structures will be caused by the force of the soft soil, which leads to the instability of the structures. Therefore, the treatment of soft soil base soil becomes more and more serious. It is more and more necessary, and the cement soil mixing method, as a method of treating soft soil foundation, can make use of the original soil to the maximum extent compared with other methods. At the same time, the cement soil mixing method has the advantages of simple construction, cheap cost, and great strengthening depth, which have been paid more and more attention, especially in the silt and silt of marine strata. The application of muddy soil is becoming more and more widely, so the research on cement soil mixing pile becomes more and more important, especially the research on the influence factors of the strength of cement soil mixing pile body, many scholars in China have also studied it, but these studies lack systematic research on various influencing factors and lack regular research. This article passes through this paper. The influence factors and the changing rules of the strength of cement soil mixing pile are studied and applied, and the influence rules of each factor on the strength of the pile body are found. This Law of influence has important theoretical significance and engineering application value to the design theory of cement soil mixing pile and the engineering design and construction guidance of cement soil mixing pile. In this paper, the present situation of cement soil mixing pile technology at home and abroad and the influence factors of strength are summarized in detail. At the same time, the change law of the influence factors of the strength of the cement soil mixing pile is theoretically analyzed. Then, in view of the special point of the silt and silt soil in the marine strata in Zhanjiang, the cement soil mixing pile in Zhanjiang steel project is used. As the object of study, through a large number of laboratory tests and field tests, the influence law of mixing ratio, curing age and water content on the strength of cement soil mixing pile is obtained. At the same time, the uniformity of cement soil mixing pile is determined quantitatively. According to the analysis results, the determinant factors affecting the uniformity of cement soil mixing pile body are summarized. For the uniformity of cement and soil mixing, the uniformity of the slurry, the continuity of the slurry and the applicability of the mixing method, the comprehensive utilization of various factors is realized, which provides a scientific method for the determination of the evenness of the cement soil mixing pile, and provides an important theoretical basis and practical basis for the construction and construction of cement soil mixing pile.

【学位授予单位】：长春工程学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU473.1

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