Development of the K-stiffness method for geosynthetic reinforced soil walls constructed with c-ϕ soils

In this paper the K-stiffness method is extended to the case of c-ϕ soils using data obtained from a total of nine new case studies – six from Japan and three from the USA. A common feature in this new data set is that the walls were all constructed with a vertical face using backfill soils with a range of fines content. The walls varied widely with respect to facing type. This new data set together with previously published data for vertical walls is now used to isolate the effect of soil cohesion on reinforcement loads within the framework of the original K-stiffness method. The new data set is used to calibrate a modified K-stiffness method equation that includes a cohesion influence factor. The modified K-stiffness method is demonstrated to quantitatively improve the estimate of the magnitude and distribution of reinforcement loads for internal stability design of vertical-faced geosynthetic reinforced soil walls with c-ϕ soil backfills when compared to the current American Association of State Highwa...

[1]  Richard J. Bathurst,et al.  Soil Reinforcement Loads in Geosynthetic Walls at Working Stress Conditions , 2002 .

[2]  Richard J. Bathurst,et al.  Failure of a geogrid-reinforced soil wall , 1990 .

[3]  Yuzhen Yu,et al.  STUDY OF MECHANICAL PROPERTIES OF SOIL-CEMENT MIXTURE FOR A CUTOFF WALL , 1997 .

[4]  Murad Y. Abu-Farsakh,et al.  Stress and Strain Monitoring of Reinforced Soil Test Wall , 2004 .

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

[6]  Ernest T. Selig,et al.  Hyperbolic parameters for compacted soils. , 1990 .

[7]  Wei F. Lee,et al.  New Method for Prediction of Loads in Steel Reinforced Soil Walls , 2004 .

[8]  Takashi Okayasu,et al.  Deformation behavior of "Shirasu" and its prediction by the subloading surface model , 2002 .

[9]  Barry Rodney Christopher,et al.  Deformation response and wall stiffness in relation to reinforced soil wall design , 1993 .

[10]  Ryan R Berg,et al.  DURABILITY OF GEOSYNTHETIC SOIL REINFORCEMENT ELEMENTS IN TANQUE VERDE RETAINING WALL STRUCTURES , 1994 .

[11]  Richard J. Bathurst,et al.  Global Level of Safety and Performance of Geosynthetic Walls: An Historical Perspective , 2002 .

[12]  K. Terzaghi,et al.  Soil mechanics in engineering practice , 1948 .

[13]  Kianoosh Hatami,et al.  Static Response of Reinforced Soil Retaining Walls with Nonuniform Reinforcement , 2001 .

[14]  Iain E. Garden Richardson,et al.  Design and Performance , 2004 .

[15]  W. D. Kovacs,et al.  An Introduction to Geotechnical Engineering , 1981 .

[16]  R. H Karol,et al.  Engineering Properties of Soils , 1979 .

[17]  N Paine,et al.  DESIGN METHODS FOR STEEP REINFORCED EMBANKMENTS. POLYMER GRID REINFORCEMENT: PROCEEDINGS OF A CONFERENCE SPONSORED BY THE SCIENCE AND ENGINEERING RESEARCH COUNCIL AND NETLON LTD AND HELD IN LONDON 22-23 MARCH 1984 , 1985 .

[18]  Richard J. Bathurst,et al.  A new working stress method for prediction of reinforcement loads in geosynthetic walls , 2003 .

[19]  Richard J. Bathurst,et al.  Short-Term Strain and Deformation Behavior of Geosynthetic Walls at Working Stress Conditions , 2002 .

[20]  Richard J. Bathurst,et al.  Observed Long-Term Performance of Geosynthetic Walls and Implications for Design , 2002 .

[21]  Naozo Fukuda,et al.  Comparative studies on design and practice of steep reinforced embankments , 1986 .

[22]  Richard J. Bathurst,et al.  Reinforcement loads in geosynthetic walls and the case for a new working stress design method , 2005 .

[23]  Richard J. Bathurst,et al.  EVALUATION OF K-STIFFNESS METHOD FOR VERTICAL GEOSYNTHETIC REINFORCED GRANULAR SOIL WALLS IN JAPAN , 2007 .

[24]  Richard J. Bathurst,et al.  Lateral and axial deformation of PP, HDPE and PET geogrids under tensile load , 2004 .

[25]  Richard J. Bathurst,et al.  Conversion of Geosynthetic Strain to Load Using Reinforcement Stiffness , 2002 .