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在农田基本建设中,水闸和涵洞的上下游翼墙、圆弧形桥台、堤岸和码头的转角,大多采用圆弧形挡土墙.在计算时,一般按无限长直墙取单宽,计算主动土压力以验算墙身的稳定和强度,确定墙身断面.但这样计算所得的主动土压力较实际偏大,当圆弧半径相对于墙高较小,圆心角较大时偏差更为显著,所以算得的墙身断面也往往偏大.本文主要对圆弧形挡土墙整体所承受的主动土压力计算方法做些探讨,以便更经济合理地确定圆弧形挡土墙的断面.
In the basic construction of farmland, the corners of the upper and lower wing walls, arc-shaped abutments, embankments, and piers of sluice gates and culverts are mostly arc-shaped retaining walls. In calculations, the width is generally taken as the width of an infinitely long straight wall. Calculate the active earth pressure to check the stability and strength of the wall and determine the section of the wall. However, the calculated active earth pressure is larger than actual. When the arc radius is smaller than the wall height and the central angle is larger, the deviation is greater. Significant, so the calculated wall section is often too large. This paper mainly discusses the calculation method of the active earth pressure of the arc-shaped retaining wall as a whole, so as to determine the section of the arc-shaped retaining wall more economically and reasonably.