Analysis for Drain Design of a Especial Rock Slopes under Rain Infiltration
The study is still few for the slopes of rock with low permeation，which has interfaces for rain infiltration and no interface for effusion. The stability of slope with rainfall infiltrating under different drain condition is evaluated by the global safety factor, based on the limited equilibrium methods. The following conclusions are obtained: (1) the two rows of drains don’t enhance the value of safety factor very much, and the layout of only one row of drains is advocated；(2) the effect of the system in which drains beat in marlite is better than the system in which drains beat in the breccia；(3) the effect of the system in which drains are designed in the toe of the slope is best, and the spacing of the drains whose diameter is 0.11 m should be less the 8m .
P. Y. Li et al., "Analysis for Drain Design of a Especial Rock Slopes under Rain Infiltration", Applied Mechanics and Materials, Vols. 90-93, pp. 410-417, 2011