高速铁路路基改良填料的试验研究

Test Study on Improved Soils as Fills of Subgrade of High-Speed Railway

基于高速铁路对路基变形的严格要求,路基填料的改良已成为高速铁路必须解决的问题,同时随着城市工业化的大力发展,每年产生大量的MSW(Municipal Solid Waste)Ash,如何有效利用这些废料改良路基填料而不用额外增加处理的负担,同时改善A、B组填料不足的状况是亟需解决的问题.本文通过土工试验和理论分析,研究了MSW Ash改良土的工程特性,结果表明添加MSW Ash可以提高土的强度,减小土的塑性变形和含水量,提高土的工程性能,使路基填土压实变的更为容易.

Based on the strict demands for roadbed deformation of high-speed railway, improving roadbed filling has become a critical problem to be resolved. And with the fast industrial development, more and more MSW ash is produced. How to utilize it effectively to improve landfill and meet the urgent need of group A and B landfills, is a problem needed to be solved urgently. Through a large number of soil tests and theoretical analysis, a study was made to evaluate the potential benefits of MSW ash, which was used to treat some local soils with poor engineering properties. The main advantages of using MSW ash as additives include increasing of shear strength, reduction of plasticity, improvement of workability for wet soils, decreasing of the maximum dry density and acquiring of the optimum moisture content. In a word, the MSW ash facilitates the compaction work to some extent.