钻孔灌注桩缺陷检测与处理技术的应用研究
发布时间：2018-07-18 10:18
【摘要】：随着国民经济的不断发展，大量的钻孔灌注桩被应用于建筑、桥梁及交通等工程实践中，不仅大大促进了灌注桩施工的机具设备及工艺的发展，而且导致了灌注桩缺陷检测与处理技术的迅速发展，为工程建设的质量提供了可靠有力的保障。 本文对桩基检测技术中跨孔声波透射法的检测原理、方法及灌注桩缺陷的判定方法进行系统的研究，介绍了高压喷射注浆技术和静压注浆技术的作用机理及施工工艺。研究表明，通过跨孔声波透射法，在灌注桩缺陷处理前期对桩基缺陷性质作出判定及在缺陷处理后期对其进行监测，为使处理后的效果达到最佳提供有力的技术保证；通过工程实例，先运用高压旋喷注浆法进行帷幕注浆，然后采用静压注浆技术，再经过二次置换将桩身缺陷部位的水泥浆置换成混凝土，从而满足施工设计要求。工程实践表明，在桩基缺陷处理工程中，，一种注浆法往往难以满足要求，应视具体情况，运用两种或是两种以上的注浆方法使缺陷处理的成功率及效果得到大大提高。
[Abstract]:With the development of national economy, a large number of bored piles have been used in construction, bridge and traffic engineering practice, which not only greatly promote the development of construction equipment and technology of cast-in-place piles. It also leads to the rapid development of defect detection and treatment technology of cast-in-place pile and provides a reliable and effective guarantee for the quality of engineering construction. In this paper, the detection principle and method of cross hole acoustic wave transmission method in pile foundation testing technology are systematically studied, and the working mechanism and construction technology of high pressure jet grouting technology and static pressure grouting technology are introduced. The results show that the properties of pile foundation defects are judged in the early stage of defect treatment of cast-in-place pile and monitored in the later stage of defect treatment by transporous acoustic transmission method, which provides a strong technical guarantee for the best effect after treatment. Through engineering example, the curtain grouting is carried out by high pressure rotary grouting method, and then the cement slurry in the defective part of pile body is replaced into concrete by using static pressure grouting technology, which meets the requirements of construction design. Engineering practice shows that in pile foundation defect treatment, one grouting method is often difficult to meet the requirements, and two or more grouting methods should be used to greatly improve the success rate and effect of defect treatment.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU473.16
本文编号：2131598
[Abstract]:With the development of national economy, a large number of bored piles have been used in construction, bridge and traffic engineering practice, which not only greatly promote the development of construction equipment and technology of cast-in-place piles. It also leads to the rapid development of defect detection and treatment technology of cast-in-place pile and provides a reliable and effective guarantee for the quality of engineering construction. In this paper, the detection principle and method of cross hole acoustic wave transmission method in pile foundation testing technology are systematically studied, and the working mechanism and construction technology of high pressure jet grouting technology and static pressure grouting technology are introduced. The results show that the properties of pile foundation defects are judged in the early stage of defect treatment of cast-in-place pile and monitored in the later stage of defect treatment by transporous acoustic transmission method, which provides a strong technical guarantee for the best effect after treatment. Through engineering example, the curtain grouting is carried out by high pressure rotary grouting method, and then the cement slurry in the defective part of pile body is replaced into concrete by using static pressure grouting technology, which meets the requirements of construction design. Engineering practice shows that in pile foundation defect treatment, one grouting method is often difficult to meet the requirements, and two or more grouting methods should be used to greatly improve the success rate and effect of defect treatment.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU473.16
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本文编号：2131598
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