水泥注浆法在工程地基加固中的应用研究

发布时间：2019-06-14 23:13

【摘要】：水泥注浆法具有高效、经济、对周围环境和建筑物无公害等优点,被广泛的应用到交通、房屋建筑、隧道等工程领域中,现已成为一种比较常用的地基处理方法。本文以新建郑州至焦作城际铁路跨北四环框架中桥地基注浆加固工程为背景,结合注浆理论和施工经验,通过理论分析、计算、试验等方法对水泥注浆法加固设计、施工、注浆效果检测、注浆加固后承载力计算等方面展开了研究工作。本文研究成果为本地区类似地基加固工程提供了理论依据,具有积极的指导意义。主要研究内容如下：(1)理论研究。对注浆法进行了概述,对注浆法的发展历史和研究现状进行了回顾,分析了水泥注浆法加固地基的基本理论。(2)注浆加固后地基承载力的确定。概括了静载荷试验的试验要点,分析了注浆加固后地基的受力特性,总结了散体桩复合地基承载力的计算方法,提出利用面积叠加法对注浆加固后的地基承载力进行计算。(3)注浆加固设计。根据注浆设计原则,并结合工程地质情况,从注浆方法选择、注浆材料和配比、注浆参数等方面对注浆加固方案进行了设计。(4)注浆施工。根据注浆加固设计进行注浆施工,总结了注浆工程的施工流程和施工工艺,指出了注浆施工质量控制应注意的问题。(5)加固效果检测。利用静载荷试验来检测注浆加固效果,经试验确定注浆加固后的地基承载力为207kPa,得出水泥注浆法在实际工程中加固地基效果良好。(6)注浆加固后的地基承载力计算。利用面积叠加法对注浆加固后的地基承载力进行计算,并与静载荷试验结果对比,验证该方法的合理性。
[Abstract]:Cement grouting method has the advantages of high efficiency, economy, no pollution to the surrounding environment and buildings. It has been widely used in traffic, building, tunnel and other engineering fields, and has become a more commonly used foundation treatment method. In this paper, based on the grouting reinforcement project of the new Zhengzhou-Jiaozuo inter-city railway bridge across the North fourth Ring Road frame, combined with grouting theory and construction experience, through theoretical analysis, calculation, test and other methods, the design, construction, grouting effect test and bearing capacity calculation after grouting reinforcement are studied. The research results of this paper provide a theoretical basis for similar foundation reinforcement projects in this area, and have positive guiding significance. The main research contents are as follows: (1) theoretical research. This paper summarizes the grouting method, reviews the development history and research status of the grouting method, and analyzes the basic theory of strengthening the foundation by cement grouting method. (2) determination of the bearing capacity of the foundation after grouting reinforcement. The main points of static load test are summarized, the stress characteristics of foundation strengthened by grouting are analyzed, the calculation method of bearing capacity of composite foundation with bulk pile is summarized, and the area superposition method is put forward to calculate the bearing capacity of foundation strengthened by grouting. (3) grouting reinforcement design. According to the principle of grouting design and combined with engineering geological conditions, the grouting reinforcement scheme is designed from the aspects of grouting method selection, grouting material and ratio, grouting parameters and so on. (4) grouting construction. According to the grouting reinforcement design, the grouting construction is carried out, the construction flow and construction technology of the grouting project are summarized, and the problems that should be paid attention to in the quality control of grouting construction are pointed out. (5) Test of reinforcement effect. The static load test is used to test the effect of grouting reinforcement, and the bearing capacity of the foundation strengthened by grouting is determined to be 207kPa. it is concluded that the cement grouting method has a good effect on strengthening the foundation in practical engineering. (6) calculation of the bearing capacity of the foundation strengthened by grouting. The area superposition method is used to calculate the bearing capacity of the foundation strengthened by grouting, and the rationality of the method is verified by comparing with the static load test results.
【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】：TU472

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