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膨胀土地区筑路往往面临无合格填料的困难,考虑就地取材在膨胀土中掺入适量的石灰进行化学改良后填筑路基,不失为工程中(尤其国外)的一种常见做法。此类特殊路基的施工有别于一般地区的路基修筑,要获得满意的施工质量和工程进度,需采取一系列专门的施工工艺和质量控制措施。该文以广西百隆高速公路建设期间修筑的一段试验路为例,介绍一套行之有效的石灰改良膨胀土路基的填筑施工工艺。
It is a common practice in engineering (especially in foreign countries) to embankment in expansive soil area to deal with the difficulty of substandard packing. Considering that the embankment is filled with appropriate amount of lime in the expansive soil for chemical modification and filling the embankment. Construction of such special subgrade is different from subgrade construction in general areas. To obtain satisfactory construction quality and progress, a series of special construction techniques and quality control measures shall be taken. Taking a section of experimental road built during the construction of Guangxi Blum Expressway as an example, this paper introduces a set of effective lime filling construction technology of expansive soil roadbed.