论文部分内容阅读
为了全面地研究重塑盐渍土和改良盐渍土的毛细水上升及次生盐渍化现象,弄清水分盐分迁移规律,结合南疆铁路盐渍土路基病害防治技术研究,自行研发了一套测定土的毛细水上升高度和盐分迁移试验系统。试验结果表明:改良盐渍土试验未见明显泛盐现象,而重塑盐渍土在同样压实度及相同物理环境下,迁移盐分表面析出十分明显,沿土柱高度(模拟土层深度)呈梯度规律变化。K938Ⅲ-3型改良盐渍土的毛细水上升高度和次生盐渍化平行试验进一步表明,盐渍土经水泥、石灰和粉煤灰等掺入物改良后能有效地抑制次生盐渍化现象的发生,有效地降低毛细水上升高度。
In order to comprehensively study the capillary water uplift and secondary salinization of remolded saline soils and saline soils, find out the law of water salinity migration, and combine with the research on the prevention and treatment of salty soil subgrade in South Xinjiang Railway, Set of soil capillary water ascent height and salt migration test system. The results show that there is no obvious pan-salt phenomenon in the modified saline soil test, while the remolded saline soil with the same degree of compaction and the same physical environment has obvious precipitation on the surface of the migrated salt. Along the height of the soil column (simulated soil depth) Gradient changes. The parallel tests of capillary water heights and secondary salinization of K938Ⅲ-3 improved saline soil further showed that saline soil could effectively inhibit the secondary salinization by the improvement of cement, lime, fly ash and other additives. Phenomenon occurs, effectively reduce the capillary water rise.