【摘要】：滲析法是一種測(cè)量非飽和土基質(zhì)吸力的重要方法,而測(cè)量結(jié)果是否準(zhǔn)確,控制滲析的時(shí)間非常重要�；谟邢拊獢�(shù)值分析軟件SEEP/W,建立滲析法的數(shù)值模型,分析滲析的試驗(yàn)過程,研究溶液吸力、土樣水力參數(shù)、初始重力含水率、初始干密度以及土樣大小等因素對(duì)吸濕條件下非飽和黏土滲析平衡時(shí)間的影響。結(jié)果表明,隨著滲析時(shí)間的增加,土樣與溶液之間的吸力差逐漸變小,滲析過程變慢;試驗(yàn)用土樣不宜過大,對(duì)于較小土樣,多數(shù)條件下土樣的滲析平衡時(shí)間約為1.5~8.0 d;當(dāng)溶液吸力較大或土體飽和滲透系數(shù)較小時(shí),滲析平衡時(shí)間大大增加;滲析平衡時(shí)間隨土-水特征參數(shù)a、n、飽和滲透系數(shù)、初始含水率及干密度的增大而減小,隨飽和體積含水率的增加而增加。
[Abstract]:Dialysis method is an important method to measure the suction of unsaturated soil matrix, and whether the measurement result is accurate or not, the time of controlling dialysis is very important. Based on the finite element numerical analysis software SEEP / W, the numerical model of the dialysis method is established, the experimental process of the dialysis is analyzed, and the solution suction, the hydraulic parameters of the soil sample, the initial gravity moisture content are studied. Effects of initial dry density and soil sample size on the dialysis equilibrium time of unsaturated clay under hygroscopic conditions. The results show that with the increase of dialysis time, the suction difference between the soil sample and the solution becomes smaller, and the dialysis process becomes slower, and the test soil sample should not be too large, for the smaller soil sample, Under most conditions, the exudation equilibrium time of soil sample is about 1.5 ~ 8.0 days, when the solution suction is large or the saturated permeability coefficient of soil is small, the dialysis equilibrium time increases greatly, and the saturated permeability coefficient increases with the characteristic parameter of soil-water. The initial moisture content and dry density decrease and increase with the increase of saturated volume water content.
【作者單位】： 合肥工業(yè)大學(xué)資源與環(huán)境工程學(xué)院;山西省建筑設(shè)計(jì)研究院;
【基金】：國家自然科學(xué)基金項(xiàng)目面上項(xiàng)目(No.41572282,No.41372281,No.41172273)~~
【分類號(hào)】：TU43
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本文編號(hào)：2139617