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借助于密度试验、含水量及液塑限试验、比重试验、压缩试验、渗透试验和静三轴试验,得到张承高速草甸土一系列物理力学指标,包括草甸土的密度、比重、含水量、液、塑限、压缩系数、压缩模量、黏聚强度、内摩擦角、渗透系数等。这些参数反映草甸土具有孔隙比大,天然含水量高,一般大于塑限值,压缩性高,亲水性强,抗剪强度较低,且富含有机质,松软而质轻,饱和或过饱和,具有大量植物根茎、易触变、力学强度低等特点,体现出草甸土工程性质非常差。
By means of density test, water content and liquid-plastic limit test, specific gravity test, compression test, infiltration test and static triaxial test, a series of physical and mechanical indexes of meadow soil of Zhangcheng high-speed are obtained, including the density, Water, plastic limit, compression coefficient, compressive modulus, cohesion strength, internal friction angle, permeability coefficient and so on. These parameters reflect that meadow soil has large void ratio, high natural water content, generally greater than the plastic limit, high compressibility, high hydrophilicity, low shear strength and rich organic matter, soft and light, saturated or too Saturated, with a large number of plant rhizomes, easy to change, low mechanical strength, reflecting the very poor nature of meadow soil engineering.