山区公路超高挡土墙的设计方法研究

以神农架林区S307省道一段20 m超高挡土墙设计为依托,针对规范推荐的方法求解库仑主动土压力的不足,利用楔体试算法求解土压力值。同时,根据工点地形地貌特征和工程地质状况,对挡土墙断面进行优化处理,消除部分主动土压力,合理平衡抗滑移稳定性和抗倾覆稳定性,有效减小了墙体尺寸,节约了工程造价。

Study on Design Method of Ultra-high Retaining Wall for Mountain Highway

With regard to the design of a 20 m ultra-high retaining wall along S307 provincial road in Shennongjia Forest Region, the Coulomb’s active earth pressure solved by the method recommended by the standard was deficient, thus the trial algorithm of wedge was used to solve the value. At the same time, according to the landform characteristics and geological conditions on the site, the cross section of the retaining wall was optimized so as to eliminate part of the active earth pressure and balance the stability against sliding and overturning properly, thus the wall size was reduced and the project cost saved.