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膨胀土对公路、铁路、房建及下水道排水排污工程均是一个大害,过去由于人们对它认识不足,在施工中未加高度重视,因而给工程带来许多病害,并造成严重的损失。从南柳线南宁市明秀东路至五塘的二级公路施工中,沿线挖方地段均出现大量的膨胀土。在32km的路段中由于处理膨胀土共增加挡土墙和排水沟计7万多立方米,增加工程投资约350万元。所以,在公路工程施工中如何利用膨胀土和如何防止膨胀土所引起的各种病害,这是需要我们认真分析研究的。
Expansive soil is a big hazard to the drainage and sewerage works of roads, railways, houses and sewers. In the past, people did not know enough about it and did not attach much importance to it in construction. As a result, many diseases were caused and serious losses were caused. Nanliu Nanning Mingxiu East Road to Wutang secondary road construction, excavation lots along the line there are a lot of expansive soil. In the 32km road section, due to the treatment of expansive soil, a total of more than 70,000 cubic meters of retaining wall and drainage ditch are added, and the project investment will be increased by about 3.5 million yuan. Therefore, how to use expansive soil in road construction and how to prevent all kinds of diseases caused by expansive soil is something that we need to carefully study.