【作者】 刘强；

【导师】 傅鹤林； 郭磊；

【作者基本信息】 中南大学 ， 土木与建筑工程， 2013， 硕士

【摘要】 摘要：我国是一个多山的国家。高速公路的修建,必然形成许多高填深切边坡,边坡又常常与崩塌、滑坡、泥石流和坠石发生密切相关等,极大的危害了人民群众的生命财产安全。因此,有必要进行边坡加固。注浆加固边坡,即将注浆液压入破碎边坡的相应部分,通过对软弱岩土体的加固来提高边坡稳定性的技术,目前在理论及工程实践中都取得了一定的成果。本文在收集整理国内外注浆加固边坡理论及工程实践的文献资料的基础之上,以溆怀高速公路为依托,通过室内试验,确定各种水泥基注浆材料的最佳配比、物理力学性能和初凝终凝时间,分析注浆加固边坡的机理,并推导注浆压力和注浆扩散半径的公式,最后结合溆怀高速K20+800～K20+935段左侧边坡加固工程实践,提出具体的工程方案,并进行数值模拟,验证加固方法的有效性。具体研究内容如下：(1)开展了对纯水泥浆、水玻璃、水泥黄砂、水泥粉煤灰和水泥黄砂粉煤灰五种注浆材料的试验研究,结果表明水泥黄砂粉煤灰注浆液具有更高的强度,可注性较好,并且成本低廉；(2)通过注浆加固边坡机理分析,探讨了水泥基注浆材料加固边坡的机理；基于渗流和注浆浆液的基本规律,推导了注浆压力和扩散半径的关系式；(3)将研究成果应用于溆怀高速K20+800～K20+935段左侧边坡加固工程实践；基于PLAXIS数值模拟软件,对比分析了注浆前后边坡稳定性。图18幅,表10个,参考文献65篇更多还原

【Abstract】 Abstract:China is a mountainous country. The construction of the highway leads many high slopes to form. Slope has closely relationship with landslide, collapse, debris flow, and this geology hazard has great harm to the people’s safety of life and property. Therefore, it is necessary for slope reinforcement. Grouting reinforcement slope, the corresponding part of the grouting in broken hydraulic slope, slope stability to improve technology based on reinforcing the soft soil, in theory and engineering practice have achieved certain results. On the base of the slope reinforcement theory and practice of literature in domestic and abroad by grouting, and according to the background of Xu-Huai expressway, some researches have been done in this dissertation. I.e. through the indoor experiment, the optimum cement ratio, grouting material physical and mechanical properties and the initial setting and final setting time is then determined, by analysis of grouting reinforcement slope mechanism, the grouting pressure and grouting diffusion radius formula will be deduced. Combined with the arms on the left slope reinforcement engineering practice highway K20+800-K20+935, concrete engineering scheme was put forward. After the numerical simulation, the effectiveness of the strengthening method is verified. The main research contents are as follows:(1) The test on the water mud, water glass sand, cement, fly ash cement and fly ash cement sand five kinds of grouting materials have been carried out, the results show that the cement sand fly ash grouting liquid with higher strength, inject ability is better, and the cost is lower;(2) Through the grouting reinforcement slope mechanism analysis, the mechanism of cement based grouting material in the basic law of slope seepage is discussed, and on the base of the relationship between grouting, grouting pressure and diffusion radius is inferred;(3) Application of research results in the K20+800-K20+935of Xu-Huai Express left slope and with PLAXIS numerical simulation software, slope stability comparison and analysis are made, where reinforcement in engineering practice on the of before and after grouting.更多还原