碎石桩复合地基处理与检测分析
发布时间：2018-09-11 08:16
【摘要】：碎石桩作为一种地基加固处理的常用方式,具有成本低、易施工和加固牢等优点,在我国地基处理中得到广泛应用,并且取得了显著的经济和社会效益。由于地基条件非常复杂,碎石桩复合地基的实际处理效果仍存在一定的不确定性分析。本文结合新乡市某电厂主厂房碎石桩复合地基处理的实际工程项目,重点分析碎石桩复合地基处理后桩间土的液化消除情况和承载力提高情况,并验证其可行性和科学性。论文的主要工作为：1、在广泛收集现有研究成果的基础上,对碎石桩复合地基的国内外研究现状进行了概述,在此基础上,对碎石桩复合地基的加固机理和破坏模式进行了较为系统的分析,对地基承载力和地基沉降计算理论进行了较为细致的探讨,为实际工程应用提供了理论基础。2、根据新乡市某电厂主厂房结构设计的实际需要,对其地基基础进行了详细的勘察,通过对不同的地基加固处理方案进行了比选分析,确定采用碎石桩复合地基的处理方案,并制定了相应的施工工艺和质量控制措施。3、根据相关规范规定,分别采用静力触探试验、动力触探试验、标准贯入试验等方法,对场地碎石桩复合地基的加固处理效果进行了系统的检测评价分析。结果表明,场地土液化情况得到完全消除,地基承载力得到显著提高,特别是对于砂土和粉土地层,处理效果尤为明显。本文的研究成果对碎石桩复合地基加固处理的实际工程应用具有一定的指导和借鉴意义。
[Abstract]:As a common method of foundation strengthening, gravel pile has the advantages of low cost, easy construction and reinforcement. It has been widely used in foundation treatment in China, and has achieved remarkable economic and social benefits. Because the foundation condition is very complex, the actual treatment effect of gravel pile composite foundation still exists certain uncertainty analysis. Combined with the actual project of gravel pile composite foundation treatment of main powerhouse in Xinxiang power plant, this paper mainly analyzes the liquefaction elimination and bearing capacity of soil between piles after the treatment of gravel pile composite foundation, and verifies its feasibility and scientific nature. The main work of this paper is 1: 1. On the basis of extensive collection of existing research results, the domestic and foreign research status of gravel pile composite foundation is summarized, and on this basis, The reinforcement mechanism and failure mode of gravel pile composite foundation are systematically analyzed, and the calculation theory of foundation bearing capacity and foundation settlement are discussed in detail. This paper provides a theoretical basis for practical engineering application. According to the actual needs of the structural design of the main powerhouse of a power plant in Xinxiang City, the foundation of the plant is investigated in detail, and through the comparison and analysis of different foundation reinforcement schemes, The treatment scheme of gravel pile composite foundation is determined, and the corresponding construction technology and quality control measures. 3. According to the relevant specifications, the static penetration test, dynamic penetration test and standard penetration test are adopted, respectively. The reinforcement effect of gravel pile composite foundation is systematically tested and evaluated. The results show that the liquefaction of the site soil is completely eliminated and the bearing capacity of the foundation is obviously improved, especially for the sandy soil and silt layer. The research results of this paper have certain guidance and reference significance for the practical engineering application of gravel pile composite foundation reinforcement.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU470
[Abstract]:As a common method of foundation strengthening, gravel pile has the advantages of low cost, easy construction and reinforcement. It has been widely used in foundation treatment in China, and has achieved remarkable economic and social benefits. Because the foundation condition is very complex, the actual treatment effect of gravel pile composite foundation still exists certain uncertainty analysis. Combined with the actual project of gravel pile composite foundation treatment of main powerhouse in Xinxiang power plant, this paper mainly analyzes the liquefaction elimination and bearing capacity of soil between piles after the treatment of gravel pile composite foundation, and verifies its feasibility and scientific nature. The main work of this paper is 1: 1. On the basis of extensive collection of existing research results, the domestic and foreign research status of gravel pile composite foundation is summarized, and on this basis, The reinforcement mechanism and failure mode of gravel pile composite foundation are systematically analyzed, and the calculation theory of foundation bearing capacity and foundation settlement are discussed in detail. This paper provides a theoretical basis for practical engineering application. According to the actual needs of the structural design of the main powerhouse of a power plant in Xinxiang City, the foundation of the plant is investigated in detail, and through the comparison and analysis of different foundation reinforcement schemes, The treatment scheme of gravel pile composite foundation is determined, and the corresponding construction technology and quality control measures. 3. According to the relevant specifications, the static penetration test, dynamic penetration test and standard penetration test are adopted, respectively. The reinforcement effect of gravel pile composite foundation is systematically tested and evaluated. The results show that the liquefaction of the site soil is completely eliminated and the bearing capacity of the foundation is obviously improved, especially for the sandy soil and silt layer. The research results of this paper have certain guidance and reference significance for the practical engineering application of gravel pile composite foundation reinforcement.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU470
【参考文献】
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1 曹l毺，
本文编号：2236129
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