济南典型地区地基土污染腐蚀性质变异研究

Study on physical and mechanical property variation of polluted erosive foundation soils in typical district of Jinan

随着城市化进程加快,济南市面临日益严重的环境岩土工程问题。以济南市典型地区的地基土为研究对象,在室内开展了水-土化学作用的物理力学效应实验,在现场对已经污染腐蚀的地基原状土样进行了物理力学性质实验。结果表明,地基土腐蚀后其物理力学性质有显著地变化。遭受污染腐蚀的地基土和无腐蚀的地基土相比,前者液塑限和压缩模量减小,液性指数和压缩系数增大。

Jinan is a famous city of history and culture, it is also the capital of Shandong province. It is faced serious environmental geotechnical problems day by day along with the quickening of urbanization course. The foundation soils in the typical district of Jinan city were taken as study object. Physical and mechanical effect experiment on chemical action of water on soil were done, undisturbed soil specimens from the polluted erosive foundation were taken, physical and mechanical property experiments were done. The result indicates that there is remarkable change for the physical and mechanical property after foundation soils were polluted. Compared with ordinary foundation soil, the polluted erosive foundation soil has smaller liquid limit, smaller plastic limit, smaller compressibility modulus; and larger liquidity index, larger compressibility factor.