条带式加筋土挡墙的拉筋原型观测试验研究

Prototype Observation Test and Study for Tied Reinforcement of Stripped Reinforced Retaining Wall

为了研究条带式加筋挡土墙拉筋的变化规律,对某条带式加筋土挡墙进行拉筋原型观测试验,在拉筋带表面上粘贴塑性电阻应变片来测定剪切带上的拉应力,对所测数据进行了整理分析,结果表明拉筋带上水平方向的拉(压)应变随着土层厚度的增加而不断增大,并且每一层土体中的拉筋应变分布具有相同的规律。说明了原型观测试验能够有效的反映拉筋应变分布变化规律。

In order to study the variation rule of stripped reinforced retaining walls, the prototype observation tests for the tied reinforcement of a retaining wall are made. The plastic resistance strain gauge pasted on the surface of the tied reinforcement strip can be used for determining the tensile stress of shear belt. Through analyzing the statistical data, the fundamental law of the tensile strain in the horizontal direction of the strip can be obtained： with the increasing of the soil filling, the tensile stress would increase constantly, and the tied reinforcement stress distribution would have the same law in each soil stratum. All these as mentioned above can explain that the prototype observation test could reflect the rule of tied reinforcement stress distribution effectively.