The Study of Large-Scale Triaxial Texts on Metamorphic Soft Rock Embankment Filler

Abstract

In order to study the wetting deformation characteristics of the metamorphic soft rock embankment filler, large-scale triaxial tests are conducted with double lines method respectively. Variation of wetting strains (i.e., the differences between strains of dry and saturated states under the same vertical deviator stress) is analyzed. Results show that, under different confining pressures, the wetting strain is increased with the increase of vertical deviator stress , the curve present weak strain hardening. the curve have turning points under different confining pressures, the turning points position are located in about 70% of the maximum deviator stress . The position of the turning points gradually move back with the increase of confining pressures, show that confining pressure is not only influence the magnitude of wetting deformation, also influence its change rules. There are two development stages of filler wetting strain curves. The size of the critical wetting strains are closely related to the ratio of vertical deviator stress and confining pressure. In contrast with the metamorphic soft rock embankment the value of and under the condition of actual work, the development law of the wetting deformation after the water is analyzed.