固化剂对盐渍土物理力学性质的固化效果研究进展

Research progress in stabilizers and their effects in improving physical and mechanical properties of saline soil

盐渍土路基产生的盐胀、翻浆、冻胀、淋溶与湿陷等病害严重影响道路的稳定性和耐久性,结合已建工程路基病害和拟建铁路工程的重要性,归纳了改良盐渍土的常用方法.分析了土体固化剂从单一传统型到离子型再到新型高分子等复合型的发展趋势,从化学角度讨论了盐渍土固化的机理,并就固化盐渍土的微观机制、物理力学性质等方面进行分析.在此基础上,对盐渍土路基填料固化的研究前景进行了展望,提出将多种固化方法及固化剂对盐渍土路基进行综合固化.

Some problems of embankments, such as salt expansion, frost boiling, frozen heaving, eluviation and saturated yielding, seriously affect the stability and durability of roadbeds in saline soil regions. Considering the problems of the operated roadbeds and the importance of the proposed railway projects, the common methods of stabilizing saline soil are summarized. It is revealed that soil curing agents are developing from single and conventional ones to ionic polymers and then to the new polymer composite materials. From the chemical point of view, the stabilization mechanism of saline soil is discussed, and the microscopic mechanisms of stabilizing sa- line soil and physical and mechanical properties of saline soil are analyzed. On this basis, the prospect of stabili- zing saline soil is reviewed, a variety of methods to comprehensively stabilize embankments of saline soil are proposed.