松花江河漫滩相软土的岩土工程性质试验研究

哈尔滨市松花江漫滩区软土由松花江曲流作用垂向沉积形成，属河漫滩相软土，其厚度分布不均匀，主要成分为淤泥质土、粉质粘土和粉砂土，具有显著的区域特点。以哈尔滨市松北区河漫滩相软土层为代表，研究区位于哈尔滨市松北区文化中心环路K1＋020--K1＋220路段，属于松花江河漫滩区，通过现场地质勘查得出研究区软土层的位置和厚度等；对各个深度的土样进行最基本的室内物理性质试验，其中包括天然含水率、天然密度、重度、液塑限以及颗粒级配分析等；对各个深度土样分别进行室内直接剪切试验，得到各土层的粘聚力和内摩擦角，以了解试验路段地基土的抗剪强度指标，从而揭示该类型软土的岩土工程性质。

The Experimental Study of Geotechnical Engineering Properties of the Songhua River Flood Land Facies Soft Soil

The soft soil in the floodplain of Songhua river basin in Heilongjiang province is formed by the Songhua river meander vertical aggradation. The soft soil layer＇s thickness is 2. 0 - 6.0 m, and the main ingredients are silt soil, silty clay, and silty soil. The soil has obvious regional characteristics. In order to study the geotechnical engineering properties of soft soil in the floodplain of Heilongjiang province, this paper takes the floodplain soft soil layer in Harbin Songbei District as the research object and focuses on K1 ＋ 020 - K1 ＋ 220 road section of Songbei District Culture Center Loop road. Through the investigation on the depth and location of the soft soil, the basic physical properties of the soils at different depths were obtained including water, density, weight, liquid-platic limit, and grain composition. By the shear test, the cohesion and internal friction angle of all soil layers were obtained in order to explain the shear strength indices of the tested road base and better reveal the types of geotechnical engineering properties of soft soil.