ЭКСПЕРИМЕНТАЛЬНОЕ ИССЛЕДОВАНИЕ ПОВЕДЕНИЯ ДЕФЕКТНОЙ СВАИ ПОД ДЕЙСТВИЕМ БОКОВОЙ НАГРУЗКИ Experimental Investigation on Behavior of Defective Pile subject to Lateral Load

S. HARISWARAN, K. PREMALATHA

Аннотация


Исследуется боковое нагружение одиночной сваи с дефектом типа «шейки» при различных условиях в песчаном грунте. Проведено статическое испытание свай в лотке, заполненном песком разной плотности, и моделей свай диаметром 20 мм длиной 40, 60 и 80 см без дефектов и с локальным сужением до диаметра 14, 16 и 18 мм на разных участках. Всего выполнено 58 таких испытаний. В результате испытаний построены графики несущей способности и нагрузка- горизонтальное перемещение верха сваи в зависимости от относительных характеристик дефектов и их расположения, глубины заделки сваи и плотности песка в лотке. В качестве предельной была принята боковая нагрузка, соответствующая смещению на 20% диаметра сваи (4мм). В результате установлено, что наибольшее снижение несущей способности на действие горизонтальной нагрузки имеет место при дефектах в верхней части сваи и это снижение увеличивается при росте гибкости сваи. При увеличении плотности песка снижение несущей способности уменьшается.

Полный текст статьи публикуется в английской версии журнала «Soil Mechanics and Foundation Engineering” vol.58, No.4


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