CAJ | 학술논문

滑裂面的准确选取对挡土墙稳定性分析有重要影响。基于塑性极限分析理论，分别推导了直线和对数螺旋线滑移模式下挡土墙主动土压力的计算公式，通过算例对比分析研究了平面滑裂面和对数螺旋滑裂面主动土压力的特点。研究结果表明：直线滑裂面为对数螺旋滑裂面的一种特例，随着滑裂面曲率增大，主动土压力合力作用点逐渐上移，主动土压力合力略有增加，但对墙趾的弯矩显著增加，不利于挡土墙稳定性；挡土墙各参数对直线滑裂面主动土压力合力作用点有不同影响，随着填土内摩擦角、挡墙倾角、填土倾角的增大而上移，随着墙土间摩擦角、黏聚力与容重挡土墙高度的乘积之比的增大而下移，合力作用点位置大致在0.2～0.4倍墙高处，说明主动土压力的非线性分布。研究结果对准确选取滑裂面形状计算挡土墙主动土压力有实际工程应用价值。
활렬면적준학선취대당토장은정성분석유중요영향。기우소성겁한분석이론，분별추도료직선화대수라선선활이모식하당토장주동토압력적계산공식，통과산례대비분석연구료평면활렬면화대수라선활렬면주동토압력적특점。연구결과표명：직선활렬면위대수라선활렬면적일충특례，수착활렬면곡솔증대，주동토압력합력작용점축점상이，주동토압력합력략유증가，단대장지적만구현저증가，불리우당토장은정성；당토장각삼수대직선활렬면주동토압력합력작용점유불동영향，수착전토내마찰각、당장경각、전토경각적증대이상이，수착장토간마찰각、점취력여용중당토장고도적승적지비적증대이하이，합력작용점위치대치재0.2～0.4배장고처，설명주동토압력적비선성분포。연구결과대준학선취활렬면형상계산당토장주동토압력유실제공정응용개치。
Based on the plastic limit analysis theory, the calculation formulas of active earth pressure for retaining wall were derived at the linear and logarithmic spiral slip pattern respectively. And the features of active earth pressure between the plane slip surface and logarithmic spiral slip surface were also compared through the calcula-tion examples. The linear slip surface is considered as a special case of the logarithmic spiral slip surface the point of resultant force of active earth pressure for linear slip surface was determined by the combination of the two cal-culation formulas. With the increase of slip surface curvature, the point of resultant force of active earth pressure gradually moves up, the value of active earth pressure slightly increases but there is significant increase in the moment of the wall toe. The parameters of the retaining wall were analyzed to study its influence on the point of resultant force of active earth pressure for linear slip surface. The point of resultant force moves up with the in-crease of the internal friction angle of backfilled soil, the inclination of the retaining wall, the inclination of back-filled soil; and it moves down with the increase of wall-soil friction angle, the ratio of cohesion and the product of wall height and soil bulk density. The result shows that the point of resultant force lies about 0.2 to 0.4 times of the wall height. The results of the study have significant references for how to select slip surface shape to calculate ac-tive earth pressure on retaining wall.