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Geotechnical and Geological Engineering

, Volume 36, Issue 2, pp 1393–1407 | Cite as

Undrained Uplift Capacity of Strip Plate Anchor Nearby Clayey Slope

Technical note
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Abstract

The effect of the nearby clayey sloping ground on the undrained uplift capacity of strip anchor plates embedded in fully saturated clay has been analyzed. The analysis has been carried out by using lower bound finite element limit analysis. The distance (s) between the slope crest and plate is varied from 0 to a finite distance until there is no change in uplift force is noted with an increase in crest distance. The uplift capacity of the plate of width B has been studied for different combinations of (i) embedment ratio (H/B) varying from 3 to 7, (ii) slope angle (β) ranging from 10° to 40° and (iii) the normalized crest distance (s/B). Also the anisotropy and nonhomogeneous behaviors of the clay have been considered in the present analysis. Uplift capacity of the anchor plate has been found to increase with increasing value of the normalized distance (s/B) between slope crest and the anchor plate. The optimum value of s/B beyond which there is no change in uplift capacity of anchor plate has been found to increase with (i) an increase in slope angle (β) and (ii) the embedment ratio (H/B) of the anchor plate. The uplift capacity is also influenced by the anisotropic behavior and nonhomogeneity of clay. The strong vertical anisotropy and the increase in cohesive strength with depth cause more resistance against uplifting in comparison to the pullout resistance in the isotropic and homogeneous clay even in presence of the nearby sloping ground.

Keywords

Uplift capacity Failure Anchor Clayey slope Limit analysis Finite elements Optimization 

Notes

Acknowledgement

The work presented in this note is a part of the work being carried out under the Science and Engineering Research Board (SERB, India) project: “Experimental and numerical studies on undrained pullout capacity and load displacement behaviour of anchor plate and granular anchor plate embedded in soft clay nearby clayey slope.”

References

  1. Ashbee RA (1969) A uniaxial analysis for use in uplift foundation calculations, Report RD/L/R 1608. Central Electricity Research LaboratoryGoogle Scholar
  2. Baba HU, Gulhati SK, Dutta M (1989) Suction effects in plate anchors in soft clay. In: Proceedings 12th international conference on soil mechanics and foundation engineering, Rio de Janerio, vol 1, pp 409–412Google Scholar
  3. Balla A (1961) The resistance of breaking-out of mushroom foundations for pylon. In: Proceedings of 5th international conference on soil mechanics and foundation engineering, Paris, vol 1, pp 569–576Google Scholar
  4. Basudhar PK, Singh DN (1994) A generalized procedure for predicting optimal lower bound break-out factors of strip anchors. Geotechnique 44(2):307–318CrossRefGoogle Scholar
  5. Bhattacharya P (2016) Pullout capacity of strip plate anchor in cohesive sloping ground under undrained condition. Comput Geotech 78:134–143CrossRefGoogle Scholar
  6. Bhattacharya P, Kumar J (2015) Uplift capacity of strip and circular anchors in soft clay with an overlay of sand layer. Geotech Geol Eng 33(6):1475–1488CrossRefGoogle Scholar
  7. Bildik S, Laman M, Suleiman MT (2013) Uplift behavior of anchor plates in sand. Geo-Congress 2013, ASCE, San Diego, California, pp 1802–1810Google Scholar
  8. Bishop AW (1966) The strength of soils as engineering materials. Géotechnique 16:89–128CrossRefGoogle Scholar
  9. Bottero A, Negre R, Pastor J, Turgeman S (1980) Finite element method and limit analysis theory for soil mechanics problem. Comput Methods Appl Mech Eng 22(1):131–149CrossRefGoogle Scholar
  10. Chen Z, Tho KK, Leung CF, Chow YK (2013) Influence of overburden pressure and soil rigidity on uplift behavior of square plate anchor in uniform clay. Comput Geotech 52:71–81CrossRefGoogle Scholar
  11. Chen J, Tho KK, Leung CF, Chow YK (2014) Centrifuge model study on vertical pullout behavior of square plate anchors in normally consolidated clay. Offshore Technology Conference-Asia, Kuala Lumpur, Malaysia, doi: 10.4043/24918-MS
  12. Das BM, Seeley GR (1975) Inclined load resistance of anchor in sand. Proc Am Soc Civ Eng 2(9):995–1003Google Scholar
  13. Das BM, Shin EC, Dass RN, Omar MT (1994) Suction force below plate anchors in soft clay. Mar Geosour Geotechnol 12(1):71–81CrossRefGoogle Scholar
  14. Davie JR, Sutherland HB (1977) Uplift resistance of cohesive soils. J Geotech Eng Div ASCE 103(9):935–952Google Scholar
  15. Desai CS, Muqtadir A, Scheele F (1986) Interaction analysis of anchor-soil system. J Geotech Eng ASCE 112(5):537–553CrossRefGoogle Scholar
  16. Giampa JR, Bradshaw AS, Schneider JA (2016) Influence of dilatation angle on drained shallow circular anchor uplift capacity. Int J Geomech ASCE. doi: 10.1061/(ASCE)GM.1943-5622.0000725 Google Scholar
  17. Khatri VN, Kumar J (2009) Vertical uplift resistance of circular plate anchors in clays under undrained condition. Comput Geotech 36:1352–1359CrossRefGoogle Scholar
  18. Kumar J, Sahoo JP (2012) Vertical uplift capacity of a group of two coaxially anchors in clay. J Geotech Geoenviron Eng ASCE 138(3):419–422CrossRefGoogle Scholar
  19. Kupferman M (1965) The vertical holding capacity of marine anchors in clay subjected to static and cyclic loading. MSc thesis, University of Massachusetts, Amherst, MassGoogle Scholar
  20. Mehryar Z, Hu Y, Randolph MF (2002) Pullout capacity of circular plate anchor in clay—FE analysis. Numerical models in geomechanics—NUMOG VIII, Pande & Pietruszczak pp 508–513Google Scholar
  21. Merfield RS, Sloan SW (2006) The ultimate pullout capacity of anchors in frictional soil. Can Geotech J 43(8):852–868CrossRefGoogle Scholar
  22. Merifield RS, Sloan SW, Yu HS (2001) Stability of plate anchors in undrained clay. Géotechnique 51(2):141–153CrossRefGoogle Scholar
  23. Merifield RS, Lyamin AV, Sloan SW, Yu HS (2003) Three-dimensional lower bound solutions for stability of plate anchors in clay. J Geotech Geoenviron Eng ASCE 129(3):243–253CrossRefGoogle Scholar
  24. Merifield RS, Lyamin AV, Sloan SW (2005) Stability of inclined strip anchors in purely cohesive soil. J Geotech Geoenviron Eng ASCE 131(6):792–796CrossRefGoogle Scholar
  25. Meyerhof GG (1973) Uplift resistance of inclined anchors and piles. In: Proceedings of 8th international conference on soil mechanics and foundation engineering, Moscow, vol 2, pp 167–172Google Scholar
  26. Neeley WJ, Stuart JG, Graham J (1973) Failure loads of vertical anchor plates in sand. J Soil Mech Found Div ASCE 99(9):669–685Google Scholar
  27. Ovesen NK (1981) Centrifuge tests of uplift capacity of anchors. In: Proceedings 10th international conference on soil mechanics, Stockholm vol 1, pp 717–722Google Scholar
  28. Rao KS, Kumar J (1994) Vertical uplift capacity of horizontal anchors. J Geotech Eng ASCE 120(7):1134–1147CrossRefGoogle Scholar
  29. Rao SN, Prasad YVSN (1992) Uplift capacity of plate anchors in sloped clayey ground. Soils Found 32(4):164–170CrossRefGoogle Scholar
  30. Rowe RK, Davis EH (1982a) The behaviour of anchor plates in clay. Géotechnique 32(1):9–23CrossRefGoogle Scholar
  31. Rowe RK, Davis EH (1982b) The behaviour of anchor plates in sand. Géotechnique 32(1):25–41CrossRefGoogle Scholar
  32. Singh DN, Basudhar PK (1992) A note on the optimal lower bound pullout capacity of inclined strip anchors in sand. Can Geotech J 29(5):870–873CrossRefGoogle Scholar
  33. Sloan SW (1988) Lower bound limit analysis using finite elements and linear programming. Int J Numer Anal Meth Geomech 12:61–77CrossRefGoogle Scholar
  34. Song Z, Hu Y, Randolph MF (2008) Numerical simulation of vertical pullout of plate anchors in clay. J Geotech Geoenviron Eng ASCE 134(6):866–875CrossRefGoogle Scholar
  35. Stewart W (1985) Uplift capacity of circular plate anchors in layered soil. Can Geotech J 22:589–592CrossRefGoogle Scholar
  36. Sutherland HB (1988) Uplift resistance of soils. Géotechnique 38(4):493–516CrossRefGoogle Scholar
  37. Tho KK, Chen Z, Leung CF, Chow YK (2014) Pullout behaviour of plate anchor in clay with linearly increasing strength. Can Geotech J 51(1):92–102CrossRefGoogle Scholar
  38. Wang D, Hu Y, Randolph MF (2010) Three-dimensional large deformation finite-element analysis of plate anchors in uniform clay. J Geotech Geoenviron Eng ASCE 136(2):355–365CrossRefGoogle Scholar
  39. Wilde B, Treu H, Fulton T (2001) Field testing of suction embedded plate anchors. In: Proceedings of the 11th international offshore and polar engineering conference, Stavanger, Norway, pp 554–551Google Scholar
  40. Yang M, Murff JD, Aubeny CP (2010) Undrained capacity of plate anchors under general loading. J Geotech Geoenviron Eng ASCE 136(10):1383–1393CrossRefGoogle Scholar
  41. Yu HS, Sloan SW (1994) Limit analysis of anisotropic soils using finite elements and linear programming. Mech Res Commun 21(6):545–554CrossRefGoogle Scholar
  42. Yu L, Liu J, Kong XJ, Hu Y (2011) Numerical study on plate anchor stability in clay. Géotechnique 61(3):235–246CrossRefGoogle Scholar
  43. Yu SB, Hambleton JP, Sloan SW (2015) Undrained uplift capacity of deeply embedded strip anchors in non-uniform soil. Computers and Geotecnics 70:41–49CrossRefGoogle Scholar

Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Department of Civil EngineeringIndian Institute of TechnologyKharagpurIndia

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