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为了研究刘老涧二站膨胀土涨缩性质影响因素,在试验资料的基础上,作者采用相关分析和向后筛选法,以自由膨胀率δef、膨胀力Pe分别作为因变量,饱和含水率Ws r,天然湿密度ρ、干密度ρd、孔隙比e、液限WL、塑性指数I P、粘粒含量Pc、粉粒含量Pf作为自变量进行逐步回归分析,得出天然湿密度ρ、液限WL、粘粒含量Pc为场区膨胀土涨缩性质的主要影响因素的结论,对其它工程区具有借鉴意义。
In order to study the influencing factors of the swelling and shrinking properties of expansive soils in Liuzaojian No.2 station, based on the experimental data, the author adopted the correlation analysis and backward screening method, taking the free expansion δef and expansive Pe as the dependent variable, the saturated water cut Ws r, natural wet density ρ, dry density ρd, void ratio e, liquid limit WL, plasticity index IP, clay content Pc and powder content Pf as independent variables. The results showed that natural wet density ρ, liquid limit WL , And the clay content Pc is the main factor that affects the expansion and contraction of the expansive soils in the site. It is of great value to other engineering areas.