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Experimental and numerical studies of laterally loaded piles located near oil-contaminated sand slope
Engineering Science and Technology, an International Journal ( IF 5.1 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.jestch.2020.03.001
Reda A. Abdelhalim , Mostafa El Sawwaf , Ahmed M. Nasr , Ahmed Farouk

Abstract Oil spillage occurrences are due to wars, accidents, drilling, storage, natural disasters, and rapid industrialization, which lead to huge amounts of waste discharge into adjacent areas. Soil contamination is also detrimental to associated structures and foundations. Therefore, in this research, experimental and numerical studies on laterally loaded piles near an oil-contaminated sand slope were conducted to estimate the ultimate lateral capacity, lateral displacement, and maximum bending moment of a single pile embedded in contaminated and uncontaminated sand slope. To simulate the contamination content as in field conditions, preparation of oil-contaminated layers of sandy soil was performed by blending clean sand samples with heavy motor oil at proportions of 0–6% of the dried weight of soil. These studies were performed by varying the contaminated sand layer thickness (LC), oil content (O.C), pile slenderness ratio (LP/DP) and distance from the slope crest (X) to the pile head. The results demonstrated a considerable reduction in the friction angle (O) with increasing oil content. Therefore, the ultimate horizontal load (Hu) of the pile also reduced. Moreover, the raise in the thickness of oil-contaminated sandy soil layer (LC) has resulted in an increment in the lateral movement of the pile (y) and a reduction in the ultimate horizontal load (Hu). When the proportion of the oil content increased to 2% over that in clean sand, the maximum bending moment raised by about 11%. In addition, a good consistency between the numerical analysis and experimental tests was observed.

中文翻译:

油污染砂坡附近侧向荷载桩的试验与数值研究

摘要 石油泄漏的发生是由于战争、事故、钻井、储存、自然灾害和快速工业化,导致大量废物排放到邻近地区。土壤污染也对相关结构和基础有害。因此,在本研究中,对油污染沙坡附近的侧向荷载桩进行了实验和数值研究,以估算嵌入污染和未污染沙坡的单桩的极限侧向承载力、横向位移和最大弯矩。为了模拟现场条件下的污染含量,通过将干净的沙子样品与重机油以土壤干重的 0-6% 的比例混合来制备沙质土壤的油污染层。这些研究是通过改变污染砂层厚度 (LC)、含油量 (OC)、桩长细比 (LP/DP) 和从坡顶 (X) 到桩头的距离来进行的。结果表明,随着含油量的增加,摩擦角 (O) 显着减小。因此,桩的极限水平荷载(Hu)也减小了。此外,油污染砂土层(LC)厚度的增加导致桩侧向移动(y)的增加和极限水平荷载(Hu)的减少。当含油量比洁净砂增加2%时,最大弯矩提高约11%。此外,观察到数值分析和实验测试之间的良好一致性。桩长细比 (LP/DP) 和从坡顶 (X) 到桩头的距离。结果表明,随着含油量的增加,摩擦角 (O) 显着减小。因此,桩的极限水平荷载(Hu)也减小了。此外,油污染砂土层(LC)厚度的增加导致桩侧向移动(y)的增加和极限水平荷载(Hu)的减少。当含油量比洁净砂增加2%时,最大弯矩提高约11%。此外,观察到数值分析和实验测试之间的良好一致性。桩长细比 (LP/DP) 和从坡顶 (X) 到桩头的距离。结果表明,随着含油量的增加,摩擦角 (O) 显着减小。因此,桩的极限水平荷载(Hu)也减小了。此外,油污染砂土层(LC)厚度的增加导致桩侧向移动(y)的增加和极限水平荷载(Hu)的减少。当含油量比洁净砂增加2%时,最大弯矩提高约11%。此外,观察到数值分析和实验测试之间的良好一致性。结果表明,随着含油量的增加,摩擦角 (O) 显着降低。因此,桩的极限水平荷载(Hu)也降低了。此外,油污染砂土层(LC)厚度的增加导致桩侧向移动(y)的增加和极限水平荷载(Hu)的减少。当含油量比洁净砂增加2%时,最大弯矩提高约11%。此外,观察到数值分析和实验测试之间的良好一致性。结果表明,随着含油量的增加,摩擦角 (O) 显着减小。因此,桩的极限水平荷载(Hu)也减小了。此外,油污染砂土层(LC)厚度的增加导致桩侧向移动(y)的增加和极限水平荷载(Hu)的减少。当含油量比洁净砂增加2%时,最大弯矩提高约11%。此外,观察到数值分析和实验测试之间的良好一致性。油污染沙土层 (LC) 厚度的增加导致桩侧向移动 (y) 的增加和极限水平荷载 (Hu) 的减少。当含油量比洁净砂增加2%时,最大弯矩提高约11%。此外,观察到数值分析和实验测试之间的良好一致性。油污染沙土层 (LC) 厚度的增加导致桩侧向移动 (y) 的增加和极限水平荷载 (Hu) 的减少。当含油量比洁净砂增加2%时,最大弯矩提高约11%。此外,观察到数值分析和实验测试之间的良好一致性。
更新日期:2020-08-01
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