نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری ژئوتکنیک، دانشکده مهندسی، دانشگاه فردوسی مشهد، مشهد، ایران
2 دانشگاه فردوسی مشهد دانشکده مهندسی گروه مهندسی عمران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
In many structures, such as wind turbines, single piles are commonly used. The soil surrounding the foundations of these structures undergoes convective flow under cyclic loads, which leads to subsidence around the pile. The geometry of soil subsidence is influenced by factors such as loading frequency, the embedded length of the pile, and soil density. Researchers are particularly interested in the extent of subsidence based on the number of cycles, the effect of cyclic loads on the pile's bearing capacity, and the impact of loading frequency on subsidence around the pile. To address these questions, an experimental program was designed. In this study, piles with different embedded lengths were subjected to one-way cyclic loading. The experiments were conducted at three different frequencies in both loose and dense sandy soils. The results of the experiments indicate that the depth and radius of soil subsidence around the pile vary depending on the embedded length of the pile, the loading frequency, and the soil density. A mathematical relationship was developed to estimate soil subsidence depth, with its parameters determined and calibrated. This model enables the prediction of soil subsidence around the pile for each loading cycle. Furthermore, static loading tests conducted before and after cyclic loading revealed that the pile's bearing capacity can either increase or decrease. These changes depend on the initial soil density and the redistribution of soil particles after cyclic loading. However, the loading frequency has little to no significant effect on the static bearing capacity after cyclic loading.
کلیدواژهها [English]
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