辽宁阜朝高速公路路基黄土的工程地质性质

对辽宁阜新-朝阳段高速公路路基黄土进行的物理力学试验及物质组成和结构的分析测试结果表明: 辽西黄土在粒度组成和化学成分上与其他地区有较大差异, 如SiO₂、Al₂O₃含量明显高于其他地区。微结构以支架大孔微胶结结构、支架大孔-镶嵌微孔半胶结结构、絮凝状胶结结构和凝块状胶结结构4种类型为主, 并具有较好的物理力学性质: 干密度为1.15～1.76 g/ cm3 , 天然含水率平均值为18.31% , c值为7.5～86.3 kPa, φ值为14.0～29.9°, 湿陷性黄土段以中等湿陷性为主。

Engineer ing geological properties of roadbed loess in Fuxin-Chaoyang highway of Liaoning

The results of physical mechanical tests, material components and structures of roadbed loess in Fuxin-Chaoyang highway of Liaoning show that Liaoxi loess is different from other areas’ in particle composition and chemical component, such as the contents of SiO2 and Al2O3 are higher than other areas. The microstructures include bracket particles and macroporous micro-cemented structure, bracket particles and macroporous-inlay particles and microporous half-cemented structure, flocculated-cemented structure and clotted-cemented structure. The loess has preferable physical and mechanical properties: dry density is 1.15～1.76 g/cm3 , average content of natural water is 18.31% , c is 7.5～86.3 kPa, φ is 14.0～29.9 degree, etc., and the collap sible loessmainly belongs to medium-collapsibility.