Passive earth pressure on embedded vertical plate anchors in sand

Passive earth pressure on embedded anchor plates constitutes a viable resisting force for the design of underground structures. In the current practice, these forces are empirically calculated, ignoring the effects of the depth of embedment and the level of consolidation of the surrounding soil, which takes place during plate installation on the in situ stress levels. Accordingly, wide discrepancies between predicted and measured pullout capacities of these plates were reported in the literature. Numerical model was developed using finite-element technique and the constitutive law of Mohr–Coulomb to simulate the case of a retaining wall partially supported by an embedded anchor plate in sand. The results produced in this investigation showed that the passive earth pressure acting on anchor plates increases due to the increase of angle of shearing resistance and the overconsolidation ratio of sand, and it decreases due to an increase of the embedment depth of anchor. Design theories were developed for the case of embedded anchor plate in overconsolidated sand. The theories developed will satisfy the design needed in terms of allowable pullout load and/or displacement.

[1]  Jyant Kumar.  Seismic horizontal pullout capacity of vertical anchors in sands , 2002 .

[2]  Adel Hanna,et al.  Passive earth pressure of overconsolidated cohesionless backfill , 2005 .

[3]  Gholamreza Mesri,et al.  The coefficient of earth pressure at rest , 1993 .

[4]  W J Neely,et al.  Failure loads of vertical anchor plates in sand : 14F, 2T, 27R. J. SOIL MECH. FOUND. DIV. V99, SM9, 1973, P669–685 , 1973 .

[5]  Conleth O'Loughlin,et al.  Loss in Anchor Embedment during Plate Anchor Keying in Clay , 2009 .

[6]  Joe O. Akinmusuru.  Horizontally Loaded Vertical Plate Anchors in Sand , 1978 .

[7]  J. Kérisel,et al.  Tables for the calculation of passive pressure, active pressure and bearing capacity of foundations , 1948 .

[8]  Braja M. Das.  Pullout Resistance of Vertical Anchors , 1975 .

[9]  E. J. Murray,et al.  Resistance of passive inclined anchors in cohesionless medium , 1989 .

[10]  J B Hansen,et al.  Earth pressure calculation , 1961 .

[11]  Ashraf K. Nazir,et al.  The effect of soil reinforcement on pullout resistance of an existing vertical anchor plate in sand , 2006 .

[12]  Braja M. Das,et al.  Ultimate Resistance of Deep Vertical Anchor in Sand , 1977 .

[13]  Chun Fai Leung,et al.  Performance of piles with enlarged bases subject to uplift forces , 1990 .

[14]  Adel Hanna,et al.  Behavior of Shallow Inclined Plate Anchors in Sand , 1988 .

[15]  K. Terzaghi.  Theoretical Soil Mechanics , 1943 .

[16]  J. Costet,et al.  Cours pratique de mécanique des sols , 1983 .

[17]  M. Bolton.  THE STRENGTH AND DILATANCY OF SANDS , 1986 .

[18]  Adel Hanna,et al.  EFFECT OF COMPACTION DURATION ON THE INDUCED STRESS LEVELS IN A LABORATORY PREPARED SAND BED , 2001 .

[19]  C. Leung,et al.  Centrifugal Model Tests on Vertical Anchor Plates , 1983 .

[20]  K. Ilamparuthi,et al.  Experimental investigation of the uplift behaviour of circular plate anchors embedded in sand , 2002 .

[21]  A. Ghaly,et al.  PuLLOUT PERFORMANCE OF INCLINED HELICAL SCREW ANCHORS IN SAND , 1998 .

[22]  Adel Hanna,et al.  Effects of K0 and Overconsolidation on Uplift Capacity , 1992 .

[23]  B. Das.  Introduction to soil mechanics. , 1979 .

[24]  G. G. Meyerhof,et al.  Uplift resistance of inclined anchors and piles , 1975 .

[25]  Xianjing Kong,et al.  Three-dimensional numerical analysis of the keying of vertically installed plate anchors in clay , 2009 .

[26]  C. Leung,et al.  Evaluation of Design Methods for Vertical Anchor Plates , 1985 .