鹤大公路草炭土工程地质特性研究

Study on Geological Characteristics of Grass-Charcoal Earth Project of Heda Highway

草炭土是喜湿性植物群落在沼泽化环境中经过长期的自然地质作用沉积在一起,由于有机质得不到充分分解而不断积累的泥炭化过程所形成的。为了深入研究草炭土的工程地质特性,以吉林东部草炭土为研究对象,在室内试验的基础上分析总结了草炭土的特殊工程地质性质。研究表明草炭土具有高天然孔隙比、高含水率、高压缩性和低抗剪强度等性质。指出草炭土与普通泥炭土的区别,并在此基础上提出地基处理措施,为建筑施工提供科学依据和合理建议。

Grass charcoal earth is settled from moist plant community in bog environment by long term natural geological action and formed in accumulated uninterruptedly mud charcoalization course due to not fully resolved organic matter. In order to deeply study on the engineering geological characteristics of grass charcoal earth, the paper analyzes and summarizes the special engineering geological property of grass charcoal earths on the basis of the indoor test, taking the grass charcoal earth in the eastern part of Jilin Province as an object of study. The study shows that grass charcoal earth has properties such as high natural porosity ratio, high moisture content, high compressibility and low shear strength etc. It also points out the difference of grass charcoal earth with ordinary mud charcoal earth and puts forward the measure for base ground treatment on this basis for building construction to provide the scientific basis and the reasonable suggestion.