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互锚式挡墙是由对称设置在路基两侧的悬臂式钢筋混凝土挡土墙体与贯通路基宽度的锚固在墙体上的锚杆连接而成。对锚杆施加预应力以承担更大的顶部车辆荷载以及适应高填方路堤的要求。为了揭示不同预应力对互锚式挡土墙位移及土压力的影响、确定合适的锚杆预应力,进行了室内模型试验及数值仿真计算。结果表明,预应力增大,两排锚杆周围的土压力增幅较其他高度处显著增加,说明互锚式挡土墙锚杆对挡墙的约束作用显著。随着预应力的增加,上部锚杆由受拉变为受压,下部锚杆所受拉力逐渐增大。当需要对锚杆施加预应力时,需采取措施提高下部锚杆的承拉能力。
Mutual anchoring retaining wall is symmetrically arranged on both sides of the cantilever reinforced concrete retaining wall and through the width of the anchoring anchor bolt in the wall. Applying prestressing force to the bolting to accommodate larger vehicle loads at the top and to accommodate high-fill embankments. In order to reveal the influence of different prestress on the displacement and earth pressure of the inter-anchored retaining wall and determine the appropriate prestress of the anchor, indoor model test and numerical simulation are carried out. The results show that with the increase of prestress, the increase of earth pressure around two rows of anchors increases significantly compared with other altitudes, which indicates that the anchoring effect of anchored retaining wall anchors to the retaining wall is significant. With the increase of prestress, the upper anchor is changed from tension to compression, and the tension of the lower anchor increases gradually. When the prestressing force needs to be applied to the anchor rod, measures should be taken to improve the bearing capacity of the lower anchor rod.