哈三电厂地处地面坡度小于2%的平原地区,加之植物性土层较厚,致使地面水不易排除,土壤中天然含水量一般高达22%以上。上述地质条件做公路路基,按照厂用Ⅲ级公路的要求,必须有500～600毫米的材料做基础,目前多采用石基。但厂所在地呼兰县缺少地方材料,厂铁路专用线尚未建成,迫使大批材料要靠公路运输。经过经济技术比较,厂方建议采用灰土路基,由哈市公路处设计和施工。现已施工完毕的23公里公路,经验收全部达到优良级。一年来施工实践证明,灰土路基是一种保证公路工程质量和降低造价的 Harbin Power Plant is located in the plain area where the slope of the ground is less than 2%, and the thick soil layer of the plant makes the surface water not easily eliminated. The natural moisture content in the soil is generally more than 22%. The above-mentioned geological conditions are used as roadbeds. In accordance with the requirements of the Grade III highways, there must be 500-600mm materials as the basis. Stone bases are currently used. However, Hulan County, where the factory is located, lacks local materials and the railway line for the plant has not yet been completed, forcing large quantities of materials to be transported by road. After economic and technical comparison, the factory proposed the use of grey soil roadbed designed and constructed by the Harbin Highway. The 23 kilometers of highways that have already been completed have reached the excellent level of experience. The construction practice in the past year has proved that the lime-soil roadbed is a guarantee for the quality of highway projects and the reduction of the cost.