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膨胀土地区路堤修筑最关心的问题是在保证路基的强度和稳定性的前提下,如何合理利用膨胀土作填料,降低工程造价,同时减少借弃土方造成的水土流失与生态环境破坏。由于化学改良法处治膨胀土工程上不经济、碎土翻拌施工困难且对环境有一定影响,决定它不可能在西部公路建设中推广应用。在以封闭包盖为主的膨胀土路堤物理处治技术上,进行了膨胀土用作路堤填料的工程适应性研究。
In embankment construction in expansive soil area, the most concerned issue is how to make rational use of expansive soil as filler to reduce project cost while reducing soil erosion and ecological environment damage caused by borrowing earthwork, while ensuring the strength and stability of roadbed. Due to the chemical modification method of expansive soil engineering uneconomical, broken soil overturning construction difficult and have some impact on the environment, it is determined that it can not be promoted in the construction of the western highway. The expansive soil is used as engineering adaptability of embankment filler in the physical treatment technology of expansive soil embankment with closed lid.