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根据室内回弹模量试验实测数据,对小间距土工格栅加筋粉砂土和小间距土工布加筋粒料土的回弹变形特性进行了对比分析发,(1)现小间距土工格栅加筋土中的土工格栅加筋层与土的共同作用提高了加筋土的整体性,能动员更大范围的加筋土体(包括其中的格栅)来吸收外荷所做的功并将其中的绝大部分转化为弹性变形能储存其中,外荷卸除后再全部释放出来,保证加筋土在交通荷载的反复作用下基本处于弹性工作状态,几乎不产生塑性变形,同时比未加筋土具有更高回弹模量。作者将此称为“储存和释放弹性能”机理;(2)由于试样尺寸小,加载后很难避免土工布发生滑动,所以土工布加筋土的回弹变形特性不宜用室内小尺寸试样来测定。
According to the measured data of the indoor resilience modulus test, a comparative analysis of the springback characteristics of the geogrid-reinforced and the geosyntactic-geosynthetic granular soil with small spacing is carried out. (1) The combined effect of the geogrid reinforced layer and the soil in the grid-reinforced soil increases the integrity of the reinforced soil and can mobilize a wider range of reinforced soil (including the grids therein) to absorb the load Work and most of them into the elastic deformation can be stored therein, the load is released after the release of all to ensure that the reinforced soil under the repeated action of traffic load in the basic state of elastic work, almost no plastic deformation, while the ratio Ungraded soil has a higher resilience modulus. The author calls this the “mechanism of storage and release of elastic energy”. (2) Due to the small sample size, it is difficult to avoid the sliding of geotextile after loading, so the rebound deformation characteristics of geotextile-reinforced soil should not be small Size sample to determine.