Description |
REAME2008 can be used to analyze slopes of any configuration with a large number of different soil layers. The slope can be subjected to a large number of external line loads or uniformly distributed loads applied on the slope surface as well as internal line loads, such as anchors, soil nails, and geogrids, applied on the failure surface. The failure surfaces can be circular, composite, or noncircular. The composite failure surfaces are mainly circular but, when the circle intersects a weak soil layer, part of the circular arc will be replaced by one or more straight lines along the bottom of the weak layer. Six different methods can be used to determine the factor of safety. It is recommended that the simplified Bishop method be used for circular failure surfaces and the Spencer method for noncircular and composite failure surfaces. Seepage can be considered by specifying a phreatic surface or a pore pressure ratio. Each soil can have its own phreatic, or piezometric surface or pore pressure ratio. To simulate the excess pore pressure during construction, a soil can have both a phreatic surface and a pore pressure ratio, together with a specified elevation or a number of boundary lines above which the weight of soil is multiplied by the pore pressure ratio to determine the excess pore pressure. Both static and seismic factors of safety can be computed in the same run. The seismic factor of safety is based on the psuedo-static method using a seismic coefficient. Other special features include the undrained shear strength increasing linearly with depth, granular materials with curved Mohr's envelopes, three-dimensional analysis of failure masses with ellipsoidal or planar ends, and the probabilistic method to evaluate the reliability of the design. All graphics are automatic without the support of other software programs. |