新疆伊犁盐渍土加固技术研究

发布时间：2018-06-24 22:54

本文选题：盐渍土 + 石灰加固盐渍土　；参考：《长安大学》2015年硕士论文

【摘要】：新疆伊犁地区盐渍土是一种富含较多盐的非常特殊的土质,而且对环境特别敏感,其本身的性质会随温度与水的变化而变化。使得盐渍土地区产生不同形态的病害,例如溶陷、盐胀、翻浆、盐渍化等。如果不采妥善的取治理措施,将会对道路路基的正常使用产生很大影响。所以为了更好地控制土壤盐渍化,解决公路工程中的盐胀病害,在公路工程建设中应加强对盐渍土路基的处治对策研究,因此,论文开展盐渍土路基处治方法和技术研究,具有重要的工程应用价值。论文以新疆伊犁地区盐渍土路基为工程研究背景,通过对工程建设中路基所产生病害的调查,提出采用当地石灰与水泥来进行加固,综合考虑盐渍土的分布状况、盐渍化程度、工程特性及水分、盐分、温度等对加固盐渍土的影响,系统的进行了水泥和石灰加固盐渍土的击实试验、CBR试验、无侧限饱水抗压强度、水稳定性、冻融循环、温缩、电镜等物理力学性能和路用性能试验。通过对加固盐渍土物理性能、路用性能、微观结构等方面综合分析与研究;提出以冻融稳定次数、抗稳定系数评价加固盐渍土抗冻性能;以水稳系数作为水稳定性评价指标等。综合考虑技术经济指标:推荐6%剂量石灰加固盐渍土做为路基填料,其各方面综合性能较优。最后采用扫描电镜测试方法从微观角度分析研究了结合料加固机理。论文研究成果可用于新疆地区不同等级的道路建设、病害防治工作中,也可以为新疆以外的其它地区的盐渍土路基病害防治处理提供参考。
[Abstract]:The saline soil in Yili area of Xinjiang is a kind of special soil which is rich in more salt and is especially sensitive to the environment. Its property will change with the change of temperature and water. Causes the salinized soil area to produce different forms of disease, such as solution, salt swelling, pulp, salinization and so on. If proper treatment measures are not adopted, it will have a great impact on the normal use of road subgrade. Therefore, in order to better control soil salinization and solve the salt swelling disease in highway engineering, we should strengthen the research on the treatment of saline soil subgrade in highway engineering construction. Therefore, the paper carries out research on the treatment method and technology of salinized soil subgrade. It has important engineering application value. Taking the saline soil subgrade in Yili area of Xinjiang as the engineering research background, through the investigation of the disease of the roadbed in the engineering construction, the paper proposes that the local lime and cement should be used to reinforce the roadbed, and the distribution of the salinized soil and the degree of salinization should be considered synthetically. The influence of engineering characteristics, moisture, salt and temperature on the consolidation of saline soil was studied. The compaction test of cement and lime reinforced saline soil was carried out systematically and CBR test was carried out. The compressive strength of unconfined saturated water, water stability, freeze-thaw cycle, temperature shrinkage, etc. Physical and mechanical properties and road performance tests such as electron microscopy. Through the comprehensive analysis and research on the physical properties, road performance and microstructure of the reinforced saline soil, it is put forward that the freezing stability coefficient is used to evaluate the frost resistance performance of the strengthened saline soil, and the water stability coefficient is used as the evaluation index of the water stability. Comprehensive consideration of technical and economic indexes: 6% lime is recommended to reinforce saline soil as subgrade filler, and its comprehensive performance is better. In the end, the mechanism of bond reinforcement was studied by scanning electron microscope (SEM) from the microcosmic point of view. The research results of this paper can be used in different grades of road construction, disease prevention and control work in Xinjiang area, and can also provide a reference for the prevention and treatment of subgrade disease of saline soil in other areas of Xinjiang.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.1

【相似文献】