ИЗМЕРЕНИЕ И УНИФИКАЦИЯ КРИВЫХ ЗАВИСИМОСТИ ГРУНТ–ВОДА И ГИДРАВЛИЧЕСКОЙ ПРОВОДИМОСТИ ДЛЯ УПЛОТНЕННОГО ЛЕССА С РАЗЛИЧНОЙ ПОРИСТОСТЬЮ MEASUREMENT AND UNIFORM FORMULATIONS OF SOIL-WATER CHARACTERISTIC CURVES AND HYDRAULIC CONDUCTIVITY CURVES FOR COMPACTED LOESS WITH DIFFERENT VOID RATIOS

Lin Zhang, Tonglu Li, Hongmei Mao, Tao Zhao, Jiheng Li

Аннотация


Методом фильтровальной бумаги в испытаниях на просачивание определены характеристические кривые соотношения грунт-вода (SWCC) и гидравлической проводимости (HCC) уплотненного лесса с различной пористостью. Для SWCC наблюдали зону насыщения капилляров, переходную зону и остаточную зону. При дегазационном всасывании наблюдалась линейная положительная корреляция с коэффициентом пористости. Для HCC среднее всасывание увеличилось с 10-2 кПа до 105 кПа, а гидравлическая проводимость снизилась с 10-6 м/с до 10-14 м/с. Когда среднее давление всасывания <100 кПа, коэффициент пористости оказывал сильное влияние на характеристические кривые, и для описания их формы можно было использовать классическую модель Ван Генухтена и модель Гарднера. При среднем разрежении ≥100 кПа коэффициент пористости практически не влиял на HCC и SWCC, кривые были линейными в соответствующих системах координат. После регрессионной обработки были получены универсальные соотношения SWCC и HCC для уплотненного лесса с различным коэффициентом пористости.


Полный текст статьи публикуется в английской версии журнала
«Soil Mechanics and Foundation Engineering”, vol.63, No.1


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