Effects of state parameter, fines content, and overburden stress on CPT resistance in silty sands
نویسندگان
چکیده
Cone penetration resistance in sands with fines contents up to 35% is explored through drained cylindrical cavity expansion simulations with a modified MIT-S1 constitutive model. The constitutive model is calibrated to sands with 0%, 10%, 20%, and 35% low-plasticity fines with data from constant volume direct simple shear, drained and undrained triaxial compression, shear wave velocity, and 1D-compression experiments. Drained cylindrical cavity expansion limit pressures in the four materials are determined by numerical analyses. Cone tip resistances are estimated from the cylindrical cavity expansion limit pressures and the effects of initial state parameter, initial stress, and fines content on cone tip resistance are explored. Stress-normalizations of cone tip resistance in terms of the initial state parameter are then presented for each material and the effects of fines content on stress normalization parameters is evaluated. 3 International Symposium on Cone Penetration Testing, Las Vegas, Nevada, USA 2014
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