UPPER BOUND ANALYSES OF PULLOUT CAPACITY OF STRIP ANCHORS IN UNDRAINED SLOPING CLAYEY GROUND

Shengbing Yu ； Juncang Tian

《Journal of GeoEngineering》 13卷3期 (2018/09) Pp. 115-120

https://doi.org/10.6310/jog.201809_13(3).3

摘要

Anchors are mainly employed in foundation systems for resisting uplift forces. A variety of approximate techniques have been proposed to estimate the ultimate pullout capacity of strip anchors in clay. However, little information is available to calculate the pullout capacity of strip anchors installed in a sloping ground. This study presents upper bound analyses of pullout capacities and the corresponding failure surface for strip anchors in a sloping clayey ground. Comparisons of these upper bound solutions with the laboratory test results obtained by Khing et al. & Rao and Prasad are carried out. It is indicated that the laboratory test results tend to underestimate the reduction of pullout capacity of anchors due to the presence of sloping ground, which may introduce safety issues when used for practical designing. The discrepancy between our theoretical results and the laboratory test results is shown, and possible explanations for it are discussed. Simple equations for predicting the pullout capacity of strip anchors are developed to facilitate the use of strip anchors in solving practical problems.

關鍵字

Anchors ； clay ； sloping ground ； failure surface ； pullout capacity ； limit analysis