本文選題：持水特征曲線 + 溫度　； 參考：《巖土力學(xué)》2014年S1期

【摘要】：開展3種不同溫度作用下粉土的持水特征曲線(SWRC)試驗(yàn),測(cè)量脫濕過程中土體的體積變化,修正體變對(duì)體積含水率的影響。試驗(yàn)結(jié)果表明,在減濕過程中粉土體積發(fā)生明顯收縮,孔隙比由0.675降低到0.645左右,不同溫度作用下的最終孔隙比相差僅為0.003,說明粉土的變形對(duì)溫度不是很敏感;溫度對(duì)粉土持水性能影響顯著,粉土的進(jìn)氣值隨著溫度的升高而降低;基質(zhì)吸力為50 kPa時(shí),不同溫度下粉土持水性能差異達(dá)到最大值,20℃、30℃、40℃時(shí)的體積含水率分別為0.397、0.361和0.338;粉土的體積含水率隨溫度越高逐漸減小,但彼此之間的差異隨著溫度升高而逐漸減弱。孔隙中水的物理特性以及水、氣的賦存狀態(tài)是不同溫度下粉土持水性能存在差異的主要原因。
[Abstract]:The water holding characteristic curve of silty soil under three different temperatures was tested by SWRC to measure the volume change of soil and the effect of modification on volume moisture content during dehumidification. The results show that the volume of silt shrinks obviously, the void ratio decreases from 0.675 to 0.645, and the difference of final void ratio under different temperature is only 0.003, which indicates that the deformation of silt is not sensitive to temperature. The influence of temperature on the water holding capacity of silt is significant, the inlet value of silt decreases with the increase of temperature, and the suction of the substrate is 50 kPa. The water holding capacity of silty soil reaches the maximum value at 20 鈩，

本文編號(hào)：1918368