论文部分内容阅读
基于静载作用下加筋土柔性桥台结构工作性能的试验研究,综合对比分析桥台基础距下部挡墙面板的距离D对柔性桥台结构极限承载力、下部挡墙变形特点、筋材应变和土压力的影响。试验结果表明:当下部加筋挡墙中筋材长度为整体桥台高度时,桥台结构极限承载力随偏移距离D增加呈现先增加后减小趋势,且在D为0.4HL(HL为下部挡墙高度)时达到最大值;加筋柔性桥台整体结构加载至破坏前一级载荷时,桥台基础沉降与台背加筋土顶部沉降均呈近似线性变化,且D/HL为0.4时二者差异沉降最小;挡墙面板顶部的水平位移明显大于中、底部,且挡墙水平位移与挡墙高度比值均小于1%;挡墙中各层筋材应变最大值随D增加而逐渐向远离面板方向发展,且D为0.4HL时台背加筋土和下部挡墙加筋中筋材的应变相差不大,整体柔性桥台结构工作性能达到最佳状态。
Based on the experimental research on the working performance of the reinforced abutment under static load, the ultimate bearing capacity of the flexible abutment structure, the deformation characteristics of the retaining wall, the strain of the reinforcement And the impact of earth pressure. The experimental results show that the ultimate bearing capacity of the abutment structure increases first and then decreases with the increase of the offset distance D when the length of the reinforcement in the lower reinforced retaining wall is the overall abutment height. When the D is 0.4HL (HL is the lower part Retaining wall height) reaches the maximum value. When the whole structure of stiffened flexible abutment is loaded to destroy the former load, the abutment abutment settlement and the top settlement of abutment stiffened soil show an approximate linear change, and the D / HL is 0.4 The difference between the two subsidence is minimal; the horizontal displacement of the top of the retaining wall panel is obviously greater than that of the middle and bottom, and the ratio of the horizontal displacement of the retaining wall and the retaining wall height is less than 1%; Away from the direction of the panel, and when D is 0.4HL, the strain of the reinforced concrete in the back of the back and the retaining wall of the retaining wall in the lower part of the retaining wall have little difference, and the working performance of the overall flexible abutment structure reaches the best condition.