CAJ | 학술논문

开展3种不同温度作用下粉土的持水特征曲线（SWRC）试验，测量脱湿过程中土体的体积变化，修正体变对体积含水率的影响。试验结果表明，在减湿过程中粉土体积发生明显收缩，孔隙比由0.675降低到0.645左右，不同温度作用下的最终孔隙比相差仅为0.003，说明粉土的变形对温度不是很敏感；温度对粉土持水性能影响显著，粉土的进气值随着温度的升高而降低；基质吸力为50 kPa时，不同温度下粉土持水性能差异达到最大值，20℃、30℃、40℃时的体积含水率分别为0.397、0.361和0.338；粉土的体积含水率随温度越高逐渐减小，但彼此之间的差异随着温度升高而逐渐减弱。孔隙中水的物理特性以及水、气的赋存状态是不同温度下粉土持水性能存在差异的主要原因。
개전3충불동온도작용하분토적지수특정곡선（SWRC）시험，측량탈습과정중토체적체적변화，수정체변대체적함수솔적영향。시험결과표명，재감습과정중분토체적발생명현수축，공극비유0.675강저도0.645좌우，불동온도작용하적최종공극비상차부위0.003，설명분토적변형대온도불시흔민감；온도대분토지수성능영향현저，분토적진기치수착온도적승고이강저；기질흡력위50 kPa시，불동온도하분토지수성능차이체도최대치，20℃、30℃、40℃시적체적함수솔분별위0.397、0.361화0.338；분토적체적함수솔수온도월고축점감소，단피차지간적차이수착온도승고이축점감약。공극중수적물리특성이급수、기적부존상태시불동온도하분토지수성능존재차이적주요원인。
Thesoilwater retention curve(SWRC)tests under the three different temperatures are carried out. The volume shrinkage deformations alsoare measured at the same time to amendment miscount caused by volume change.The test result showsthat the shrinkage is obvious in the drying process,thevoid ratio reduced to 0.645 from 0.675, but the difference of final void ratio under different temperatures is only 0.003; it is shown that the silt’s deformationis not sensitive to temperature. The water holding capacity is significant different under the action of different temperatures. The air-entry value is smaller when the temperature increased. The difference of water holding capacity reach maximum under the action of suction of50 kPa. The water contentis 0.397, 0.361 and 0.338 respectively under the temperatures of 20℃,30℃,40℃;but the difference is decreasing with the suction increased. The water physical properties, water and gas’s occurrence are changed under the different temperatures and it lead to the changing of the water holding capacity.