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以四川已建和在建高速公路为依托,以四川盆地软弱土大量试验资料为基础,系统分析了四川盆地软基的成因、分布规律,总结了四川盆地软弱土的物理力学指标、工程特性。四川盆地软弱土具有含水率高、压缩性大、渗透性低、抗剪强度低、孔隙比大、厚度变化大等特点。根据具有代表性的盆地软基物理力学性质指标,总结了软弱土物理力学性质指标间的相互关系。
Based on a large number of experimental data of soft soil in Sichuan Basin based on the built and underway in Sichuan Province, the causes and distribution of soft ground in Sichuan Basin are systematically analyzed. The physical and mechanical indexes and engineering characteristics of soft soil in Sichuan Basin are summarized. The soft soil in Sichuan Basin has the characteristics of high moisture content, large compressibility, low permeability, low shear strength, large void ratio and large thickness variation. According to the representative indexes of physical and mechanical properties of the soft foundation in the basin, the interrelationship between indices of physical and mechanical properties of soft soil is summarized.