ВЛИЯНИЕ ЩЕЛОЧНОГО ЗАГРЯЗНЕНИЯ НА ПРОЧНОСТЬ СЕЗОННОПРОМЕРЗАЮЩИХ ЛЕССОВЫХ ГРУНТОВ В УСЛОВИЯХ СДВИГА Influence mechanism of alkali pollution on loess failure behavior in seasonal frozen soil area under shear condition

Tengfei Guo, Qianqian Ma, Jinyang Tian, Wanjun Ye, Qiangbing Huang, Zhiyuan Xu, Jiahao Wang

Аннотация


Чтобы оценить, как загрязняющие щелочные растворы влияют на механические свойства лесса, были испытаны на прямой сдвиг образцы грунта, пропитанные щелочным раствором после 10 циклов замораживания-оттаивания (по 12 часов каждый). Образцы лессового грунта были отобраны с глубины 4…5 м в районе г. Сиань (северо-запад Китая) и имели следующие характеристики: w = 18%, ρs = 2,69 г/см3; ρ = 1,80 г/см3; Ip = 12%. Авторы использовали 6% и 10% растворы NaOH для моделирования щелочных промышленных стоков, а 1% раствор NaOH - для моделирования бытовых сточных вод. Испытания указанных образцов позволили авторам статьи сделать следующие выводы: 1) с повышением концентрации раствора щелочи NaOH сцепление, угол внутреннего трения, пределе пластичности и число пластичности грунта увеличиваются; 2) увеличение циклов замораживания-оттаивания образцов грунта, пропитанных щелочью одинаковой концентрации, приводит к увеличению предела пластичности и числа пластичности грунта, а также незначительно увеличивается угол внутреннего трения.

Полный текст статьи публикуется в английской версии журнала

«Soil Mechanics and Foundation Engineering”, vol.63, No.2


Литература


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