关于填土表面为倾斜平面时挡土墙土压力作用方向的探讨

Discussion on Application Direction of Retaining Wall Earth Pressure under An Inclined Plane of Earth-fill Surface

挡土墙填土面为倾斜平面时，教科书假定：土压力强度的方向与填土面平行。现经分析与推算，证明土压力强度的方向角α和填土面倾角β、挡土墙高度H及填土深度Z有关，即α＝f（β、H、Z）。总土压力的方向角为。实例验算，总土压力的水平分力用α角及β角算出的结果，相差5．1％。

It is assumed in the textbock that the earth pressure direction is in parallel to the earth - fill surface when theearth - fill surface of a retaining wall is an inclined plane .The analysis and calculation made by the author recently has proved that the direction angle of the earth pressure a relates to the dip angle of the earth - fill surface β, the height of theretaining wall H and the depth of the earth - fill z, i.e. α = f(β、 H、 z).The direction angle of the total earth pressure isα = tg. The example checking compuation indicates tho the difference between the horizontal components of the overall earth pressure calculated using angle a and angle 5 resPectively is 5. 1%.