ОЦЕНКА НАДЕЖНОСТИ ЮБОЧНЫХ ФУНДАМЕНТОВ В НЕОДНОРОДНЫХ ГЛИНИСТЫХ ГРУНТАХ Reliability Assessment of Skirted Spudcan Foundations in Variable Clay Soils Considering Spatial Uncertainty

X. Xing, Qilin Yin, J. ZHAI

Аннотация


Методом конечно-элементного анализа проведена оценка стохастических характеристик несущей способности и надежности самозадавливаемого фундамента типа «юбочный спадкэн» с учетом влияния пространственной изменчивости грунта. Разложение Карунена-Лёве использовалось для дискретизации как стационарных, так и нестационарных случайных полей изменчивости свойств для двух типичных профилей распределения недренированной прочности грунта на сдвиг, которые далее отображались в модели конечных элементов. Для каждого случая было проведено 400 построений методом Монте-Карло, что позволило получить стабильные средние значения. Анализ показал, что пространственная изменчивость грунта оказывает значительное влияние на несущую способность основания: максимальные значения превышают детерминированные оценки на 30%…36%, минимальные же снижаются до 57%...64%. Это подчеркивает важность учета изменчивости грунта в проектировании на основе надежности для повышения эффективности управления инженерными рисками и безопасности.


Полный текст статьи публикуется в английской версии журнала
«Soil Mechanics and Foundation Engineering”, vol.63, No.3


Литература


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