Zero Extension Line Theory of Earth Pressure

by Karim Habibagahi, (A.M.ASCE), Chf. Soils Engr.; Dam Sect., Gannett Fleming Corddry and Carpenter, Inc., Harrisburg, Pa.; formerly, Assoc. Prof. of Civ. Engrg., Pahlavi Univ., Shiraz, Iran,
Arsalan Ghahramani, (A.M.ASCE), Prof. of Civ. Engrg.; Pahlavi Univ., Shiraz, Iran,

Serial Information: Journal of the Geotechnical Engineering Division, 1979, Vol. 105, Issue 7, Pg. 881-896

Document Type: Journal Paper


A theory of earth pressure for sand is developed. The theory is based on a simplified zero extension line field. Equations and charts for computing earth pressure coefficients with various values of wall roughnesses are presented. The results compare favorably with Sokolovski's coefficients of earth pressure. It is also shown that for active case in dense sand the direction of major compressive stress near the wall is almost vertical even for a very rough wall. A useful coefficient of roughness for the wall is defined. The results are compared with those predicted by Sokolovski, Coulomb, and Rankine theories.

Subject Headings: Walls | Soil pressure | Sandy soils | Soil compression | Soil stress | Vertical loads

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