Seepage in earth dams in two- and three-dimensional formulations of the problem

Abstract

2. The shear moduli for small values of the initial lateral pressure and under conditions of a combined stress state for cohesive soil depend on the level of the initial lateral pressure and for the noncohesive on the change in the moisture content.In the interval of stresses created in the specimen, when the initial lateral pressure does not exceed 0.098 MPa and the average static stress does not exceed 0.3 MPa, the shear moduli are practically proportional to the average stress.3. Both volumetric strains and distortional strains under a brief dynamic shear load and under conditions of a combined stress state are far less than the strains from an equal static load.In this case, whereas the volumetric strains in shear for noncohesive soil have the character of compacting, for cohesive soils they are always loosening.

?Optimization of earth-dam structures? and the potential of numerical methods

“…As we know, a change in the sign of the slope of the depression curve (and streamlines) in the plane problem or in any plane section of the three-dimensional problem is possible only above drainage, which is absent here. Consequently, the results cited by Rasskasov et al, [12] contradict the law of energy cons ervatio ~, and My scientific-practical conclusions from similar hydrodynamic grids are unacceptable.…”

“…It is difficult to say whether the paradoxic upward bend of the streamlines in the numeric solution of the seepage problem should be referred to as errors of the mathematical model, or as the unfavorable effect of the human factor [12,. As we know, a change in the sign of the slope of the depression curve (and streamlines) in the plane problem or in any plane section of the three-dimensional problem is possible only above drainage, which is absent here.…”