黄土地基改性处理技术研究进展评述与展望

Progress Review and Perspective Problems on Loess Foundation Reinforcement by Means of Modification Treatment

基于黄土地基改性的物化机制,分析了黄土地基改性处理方法与技术的研究进展及工程应用情况,评述了改性黄土动静力学性能研究的主要切入点及不同改性处理方法的优缺点,总结了未来黄土地基改性处理技术的研究方向。结果表明:黄土地基的物理、化学改性具有不同的内在机制;现阶段黄土地基改性处理研究更多关注了静载作用下地基的强度与稳定性,对动力特性、环境因素等的影响考虑不足,研究结果偏向性强、不够系统,定量化和标准化也显薄弱。新型环保改性材料研发及改性土强度、改性黄土的动力特性及稳定性、环境因素对改性地基的定量影响、黄土地基改性处理施工工艺的优化配置和施工过程的精细化控制等是未来需要关注的研究方向。

Based on the loess foundation modification mechanism, the methods and progress of loess foundation modification treatment application research in engineering were analyzed. The main points of the research on static and dynamic mechanical properties of modified loess were discussed. Meanwhile, the advantages and disadvantages of different modification methods were compared. Finally, the research direction of loess foundation modification in future was pointed out. The results show that there are different mechanisms between physical and chemical modifications in loess foundation. At present, researches on loess modification pay more attention to the strength and stability of the foundation under static load, which is lacking in the consideration of dynamic behaviors of loess foundation and environment factors. Research results are greatly biased, and the systematic, quantitative properties as well as standardization are weak. There is no doubt that some research directions should be concerned in future such as the research of new environmentally friendly materials and modified loess soil strength, stability of modified loess and dynamic behaviors, quantitative effect of environmental factors on the modified foundation, optimization of construction technology and fine control of construction process in the process of loess foundation modification.