本文關(guān)鍵詞：多因素耦合作用下砒砂巖凍脹性能試驗　出處：《哈爾濱工業(yè)大學(xué)學(xué)報》2016年11期 　論文類型：期刊論文

  更多相關(guān)文章： 脹凍率 含水率 冷端溫度 干密度

【摘要】：為研究含水率、溫度、干密度與砒砂巖凍脹率的關(guān)系,針對內(nèi)蒙古鄂爾多斯市準格爾旗砒砂巖進行不同含水率、不同溫度、不同干密度下多因素耦合凍脹試驗.研究結(jié)果表明:砒砂巖含水率在11%以下時,幾乎不發(fā)生凍脹;含水率為12%~16%時,凍脹率隨含水率增加呈線性增大;凍脹率隨干密度的增大而增大,當(dāng)冷端溫度達到-20℃時,表現(xiàn)異常;凍脹率隨冷端溫度的降低而增大,但干密度為1.85 g/cm3的試件,凍脹率隨冷端溫度的降低凍脹率有減小態(tài)勢.運用spss軟件對試驗數(shù)據(jù)進行多元非線性回歸,確定了含水率、干密度、冷端溫度多因素耦合作用下凍脹率的回歸方程.
[Abstract]:In order to study the relationship between water content, temperature, dry density and frost-heaving rate of arsenitic sandstone, different moisture content and different temperature were carried out in Zhungeerqi Pisha sandstone, Ordos City, Inner Mongolia. Coupling frost heaving test with different dry densities. The results show that when the moisture content is below 11%, there is almost no frost heave. When the moisture content is from 12 to 16, the frost heaving rate increases linearly with the increase of water content. The frost heaving rate increases with the increase of dry density, and abnormal when the cold end temperature reaches -20 鈩，

本文編號：1366496