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有些公路路基较高或路段附近符合填筑要求的岩土材料缺乏,若大量的膨胀土弃方不用而调运线外远距离可用的土方,或采用原地膨胀土掺石灰改性方案,均因路堤填方量过大,增加的工程费用过高,且工期延误等实际情况致使建设单位和施工单位无法承受,而此种情况在其他地方也是常遇到的问题。根据公路项目区的工程地质条件因地制宜地广开材源,采用满足工程质量且技术可行、经济合理、施工方便的填筑方案具有重要意义。膨胀土作为路基填筑材料,是当前公路建设中经常碰到的问题,在公路建设项目的实施中应采用适宜的填筑设计方案进行施工,能够降低工程造价,节约投资,确保经济合理与工程质量优良。
Some high-road subgrade or road sections meet the lack of filling the required geotechnical materials, if a large number of expansive earth without the use of long-distance transfer line can be used outside the earth, or in situ expansion of soil-doped lime modification program, both due to Embankments fill too much, the increase in the cost of the project is too high, and the actual situation of construction delays and other construction units and construction units can not afford, and this situation is also often encountered in other parts of the problem. According to the engineering geological conditions of the highway project area, it is of great significance to widen the source of raw materials according to the local conditions and adopt the filling scheme that meets the engineering quality and is technically feasible, economically reasonable and convenient in construction. As an embankment filling material, expansive soil is a common problem in the current highway construction. In the implementation of highway construction project, appropriate filling design scheme should be adopted for construction, which can reduce construction cost, save investment, ensure economic rationality and engineering Good quality.