膨胀土路堤设计中应考虑的几个问题

膨胀土作为一种特殊土,其工程性质较差,在膨胀土地区修建高速公路,必须高度重视其特性对工程安全和稳定的影响。因此,在路堤设计前,应通过土力学试验来研究了解它的一些工程特性。本文主要从土的性质、最佳含水量与压实度控制、干湿循环作用的影响以及路堤不均匀沉降的控制等几个方面来讨论如何做好路堤的设计工作,对于路堤设计人员具有一定的参考和借鉴作用。

Swelling soil is a kind of special soil. It＇s property is not fit for engineering well. When we build freeway in swelling soil area, we should consider the influence of it. Before design, we must do some reach in some area such as soft property, optimum water content, compactness control, drying-wetting cycle action, and control of differential settlement and so on. Which has some reference for designers of road embankments.