Experimental study on evaluating the lateral load capacity of raker pile in sloping ground

IF 1.6 Q3 ENGINEERING, CIVIL
S. Kayalvizhi, K. Muthukkumaran, S. Shukla
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Abstract

ABSTRACT A lot of uncertainty is associated with the behavior of pile foundations on the sloping ground due to factors like soil – pile interface and vague evaluation of pile bearing capacity. These constraints have a considerable impact on the extensive implementation of deep foundation on sloping ground. Comprehensive research studies were carried out on laterally loaded vertical piles on horizontal ground whereas only a limited number of studies have been conducted on the behavior of the laterally loaded raker-pile system on sloping sites. Therefore, to address this knowledge gap, the current investigative research paper aimed to study the results of a series of static lateral load tests were conducted in the laboratory on a single aluminium model raker pile embedded in loose sandy soil on 1V: 2H sloping ground. The loading directions were varied considering either forward (close to the slope) or reverse (away from the slope) loading for all pile positions. The influence of the sloping ground was quantified by measuring the pile response for horizontal ground conditions. It was observed that there is a significant increase in the displacement of the pile for the sloping ground surface compared to the horizontal ground. With an increase in the edge distance from the slope crest towards the embankment, a reduction in the pile displacement was observed. The optimum distance from the slope crest towards the embankment where the effect of slope becomes nullified under both forward and reverse lateral loads was determined as 10D (D – Diameter of the pile). From the obtained results, it was evident that in the case of the level ground and sloping ground with forward loading, the negative raker piles offer more resistance to lateral loads than vertical piles. In contrast, the positive raker piles endure the least lateral load with increasing inclination angle.
倾斜地基中斜桩横向承载力评价的试验研究
由于土-桩界面和桩承载力评估模糊等因素,斜坡地基上桩基的性能存在许多不确定性。这些限制对在斜坡地面上广泛实施深基础产生了相当大的影响。对水平地面上的横向荷载垂直桩进行了全面的研究,而对斜坡场地上横向荷载斜桩系统的性能只进行了有限数量的研究。因此,为了解决这一知识空白,本研究论文旨在研究在实验室中对嵌入1V:2H斜坡松散砂土中的单个铝制模型耙桩进行的一系列静态横向载荷试验的结果。考虑到所有桩位的正向(靠近斜坡)或反向(远离斜坡)荷载,荷载方向发生变化。通过测量水平地面条件下的桩响应来量化倾斜地面的影响。据观察,与水平地面相比,倾斜地面的桩位移显著增加。随着从坡顶到路堤的边缘距离的增加,观察到桩的位移减少。从坡顶到路堤的最佳距离被确定为10D(D–桩的直径),在正向和反向横向荷载作用下,斜坡的影响将消失。从所获得的结果来看,很明显,在水平地面和斜坡地面具有正向荷载的情况下,负斜桩比垂直桩提供了更大的侧向荷载阻力。相反,随着倾角的增加,正斜桩承受的侧向荷载最小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.90
自引率
7.70%
发文量
31
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