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软土在我国沿海地区、内陆平原及山谷等地方都有广泛分布,分为滨海沉积、湖泊沉积、河滩沉积、谷地沉积和沼泽沉积五类。对公路、尤其是高速公路的正常使用都有很大影响,在高路堤、大型桥梁、大量的涵洞、通道处斩钉截铁土都给它们带来不同程度的危害,目的是为了处理好路基,使来往车辆及司乘人员安全、快速、舒适地行驶在公路上,若不加处理往往会发生路基失稳或过量沉陷,导致公路破坏或不能正常使用。
Soft soil in China’s coastal areas, inland plains and valleys and other places are widely distributed, divided into coastal sediments, lake sediments, floodplain deposition, valley deposition and swamp deposition five categories. It has a great influence on the normal use of the highway, especially on the expressway. The cutting of high embankments, large bridges, a large number of culverts and tunnels will bring them different degrees of harm. The purpose is to handle the subgrade so that traffic Vehicles and drivers can safely and quickly and comfortably drive on the highway. If they are not treated, the subgrade will be unstable or overly subsided, causing the highway to be damaged or unable to be used normally.