CAJ | 학술논문

许多与膨胀土有关的工程问题都与其渗透性有关，由于膨胀土的胀缩性，裂隙膨胀土的渗透性会随渗透历时而逐渐变化。利用柔性壁渗透仪对重塑膨胀土进行了渗透试验，分别研究了有无裂隙、浸水历时长短等对膨胀土渗透性的影响规律。结果表明：有裂隙时膨胀土渗透系数比无裂隙时大2个数量级左右；浸水后，裂隙膨胀土的渗透性迅速显著降低，大约2d～3d后趋向稳定，稳定后渗透系数约比浸水前低1～2个数量级，与无裂隙膨胀土接近。为工程设计和数值计算提供参考。
허다여팽창토유관적공정문제도여기삼투성유관，유우팽창토적창축성，렬극팽창토적삼투성회수삼투력시이축점변화。이용유성벽삼투의대중소팽창토진행료삼투시험，분별연구료유무렬극、침수력시장단등대팽창토삼투성적영향규률。결과표명：유렬극시팽창토삼투계수비무렬극시대2개수량급좌우；침수후，렬극팽창토적삼투성신속현저강저，대약2d～3d후추향은정，은정후삼투계수약비침수전저1～2개수량급，여무렬극팽창토접근。위공정설계화수치계산제공삼고。
Many engineering problems related to expansive soils are found to have strong relationship with the soil perme-ability .Due to the soil’s well-shrink property ,the permeability of cracked expansive soil would change gradually along with the soaked period .The laboratary seepage tests are conducted on remolded expansive soil with a flexible-wall perme-ameter ,and the influences of the presence of cracks and the duration of soaked period on the permeability of expansive soil are studied respectively .The test results show that the permeability coefficient of cracked expansive soil is about two orders of magnitude greater than that without cracks ;The permeability of cracked expansive soil reduces significantly after soaking ,it tends to stabilize after about two to three days ,the final permeability coefficient after stabilization is about one to two orders of magnitude lower than that of no-soaked expansive soil ,and it is close to that of the expansive soils with-out cracks .All these as metioned above could provide practical references for project design and numerical calculation .