Page - 1411 - in Book of Full Papers - Symposium Hydro Engineering

considering the Mohr — Culomb criteria and the obtained in-situ modulus of elasticity and considering the relationship suggested by Bijrum and other researchers in this regard, the mentioned relationship for fine-grained soils, based on the type of the soil would be as follows: E≅ (250 to 500) (σ1-σ3) F Hence, it can be seen, due to the high modulus of elasticity obtained in in- situ tests, cohesion of natural soils is higher than the laboratory values of disturbed samples. In table 2, pressure meter tests estimates the minimum cohesion values and considers them for slope stability calculations. However, a conservative approach has been used in selection of the parameters for numerical calculation. Table.2.Plate loading test results at spillway area in Glevard dam q kg/cm2 δ mm υ Es E PT-1 Dry C.1 7.07 2.08 0.35 760 760 Dry C.2 14.1 3.35 0.35 8.30 C.3 21.2 5.72 0.35 830 PLT-1 sat C.1 7.69 4.49 0.35 630 300 sat C.2 15.2 18.6 0.35 305 C.3 20.8 45.3 0.35 172 PLT-2 Dry C.1 7.13 5.2 0.35 511 510 Dry C.2 12.7 8.3 0.35 572 C.3 - - 0.35 - PLT-2 sat C.1 7.13 15.8 0.35 168 200 sat C.2 15.2 26.7 0.35 213 C.3 18 30 0.35 212 PLT-3 Dry C.1 7 2.25 0.35 1172 500 Dry C.2 19.8 2.1 0.35 599 C.3 33.6 42 0.35 310 PLT-3 sat C.1 7.2 8.5 0.35 312 250 sat C.2 15.3 25.3 0.35 256 C.3 17.3 38 0.35 170 PLT-4 Dry C.1 7 0.97 0.35 2718 2800 Dry C.2 19.8 2.2 0.35 3404 C.3 38.2 4.73 0.35 3012 PLT-4 Dry C.1 10.3 5.76 0.35 667 500 sat C.2 13.5 9.97 0.35 504 C.3 21 21.4 0.35 367 PLT-4 Dry C.1 7.2 14.8 0.35 180 180 sat C.2 14.3 84.3 0.35 63 C.3 - - 0.35 - 1411