吉林地区草炭土物理力学指标相关性试验研究

Experimental research on the correlation of physical mechanics indexes of the turfy soil in the Jilin Area

通过大量土工试验,对鹤(岗)—大(连)公路路基草炭土密度、含水量与天然孔隙比及压缩系数进行相关性研究,发现草炭土密度与天然含水量存在较好的幂函数关系;密度与天然孔隙比及压缩系数存在较好的指数函数关系;含水量与天然孔隙比及压缩系数均存在很好的指数关系。通过对比发现,各参数之间的相关关系与理论公式吻合较好。比较吉林省其他地区草炭土物理力学指标的相关关系,均与鹤大草炭土显示出很好的相似性。结果表明:本文所建立的草炭土密度、含水量分别与天然孔隙比、压缩系数的相关关系,可以为吉林地区草炭土地基参数计算及预测提供重要参考。

Through a large number of geotechnical tests,the correlativity between density,water content,natural void ratio and compressive coefficient are examined on the roadbed of the Hegang-Dalian road.It is found that there is a rational power function relationship between density and natural water content.There are also rational exponential relations not only between density and ignition loss but between density and compressive coefficient.In addition,there are fairly good exponential relations not only between water content and natural void ratio but also between water content and compressive coefficient.It is also found by comparison that the result was completely consistent between the parameters of correlation and the theoretical formula.There is a good comparability between the turfy soil physical and mechanical indexes related to the Hegang-Dalian turfy soil and the other areas of Jilin.The results indicate that the relations（density of turfy soil and natural void ratio,density and compression coefficient,water content and natural void ratio,as well as water content and compression coefficient） provide significant references for prediction and parameter calculation of turfy soil ground in the Jilin area.