台阶式加筋挡墙验算的对比分析

Comparison and Analysis of Computations for Reinforced Tiered Retaining Wall

采用加筋挡墙设计软件MSEW3.0,对台阶式加筋挡墙不同平台宽度、上下墙高度的变化以及采用综合坡率法等几种不同工况下加筋土挡墙稳定性进行验算,对比分析计算所需筋材长度和所需筋材强度的变化以及不同工况下所需筋材用量的不同。土工格栅筋材的用量随上墙高度的增大而减少。一定范围内,随平台宽度的增大,计算所需的每延米挡墙土工格栅筋材的数量逐渐减少;但是随着平台宽度的继续增大,计算所需土工格栅筋材的数量逐渐增加。综合坡率单级加筋挡墙比对应的台阶式加筋挡墙所需的每延米土工格栅筋材的数量少,而且随着平台宽度的增加,采用综合坡率单级加筋挡墙的土工格栅筋材节省量显著增加。

Software MSEW3.0 for the design of reinforced retaining wall was employed to check the stability computations for reinforced tiered retaining wall in different cases：different step widths,various upper and lower wall heights,and single-step retaining wall with a corresponding comprehensive slope ratio.The calculated length and strength of reinforcement material as well as the quantity of reinforcement material in those different cases were compared and analyzed.Results show that the geogrid quantity decreases along with the increase of upper wall height.With the increase of step width in a certain range,the geogrid quantity per linear meter of the retaining wall required for computation gradually decreases; while with the continuous increase of step width,the geogTid quantity gradually increases.Moreover,the geogrid quantity per linear meter of single-step reinforced retaining wall with a corresponding comprehensive slope ratio is less than that of reinforced tiered retaining wall,and with the increase of step width,the geogrid quantity for the former is remarkably reduced.