Geomechanics Lab Report

| 3/29/2011| | | | CIVL462 Laboratory ReportGeomechanics 2| | | | | | Justin Hill 3463527 comp some(prenominal) 2| CIVL462 Laboratory Report Geomechanics 2 Direct Shear stress Introduction The rob effect is one of the most fundamental engineering properties of a realm as it is required whenever a structure is built. Structures require foundations in the ground and solid foundations are dependent on a states snip resistance. Moreover, the plume strength is demand for engineering situations such as calculating the pressure exerted by a soil on a retaining wall, sheet piling, ascertain the stability of side of meats or cuts and find the bearing capacity for foundations. In this Laboratory, a direct crop device ordain be used to determine the surcharge strength of a cohesionless soil. In this case, dry river sand was used. The shear strength is directly colligate to the incline of internal friction. From plo tting shear tautness versus horizontal version for antithetical perpendicular honest stresses, the maximum shear stress for each can be obtained. After several trials, a plot of maximum shear stress versus vertical (normal) confining stress is produced. A serial line approximation for the Mohr-Coulomb disappointment envelope can hence be drawn.

The friction angle is thus calculated from the slope of the failure envelope. As with any experiment, the more tests taken for different normal stresses, the more sinless the Mohr-Coulomb failure envelope will be. Experimental Procedure * Weigh the initial mass of soil and record it. * Measure the height, width and distance of the shear lash and record it. * Place! the sample in the shear box, direct off the top and then calculate the sample once again to compute the mass of soil used. * see the direct shear device, initializing the three gauges to zero. (Horizontal dial reading, horizontal and vertical displacement readings. * coif vertical load to 10kg, 20kg and 30kg for each...If you want to convey a encompassing essay, order it on our website: OrderEssay.net

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