土工格室加筋粗粒土加筋效果分析

Analysis on Reinforcing Effect of Geocell-reinforced Coarse-grained Soil

为了深入了解土工格室加筋粗粒土的加筋效果,采用大型三轴试验方法分析了土工格室对粗粒土力学特性的影响,引入加筋效果系数对粗粒土加筋效果进行了较全面的评价,探讨了加筋机理。结果表明:轴向应变较小时,土工格室加筋效果不明显,随着轴向应变的增加土工格室的加筋效果才比较明显。土工格室的各项加筋效果系数在不同围压下均大于1。土工格室不仅直接对格室单元内的土体进行加固,还间接地加固约束土工格室复合结构体附近的土体。

In order to study the mechanical characteristics of coarse-grained soil as well as its reinforcing effect, the large-scale triaxial tests are carried out to analyze the effects of reinforcing geocell on the mechanical characteristics of coarse grained soil. The effect coefficients are introduced to value the reinfocerment effect comprehensively, and the func- tion mechanism of geocell is also discussed. The results show that the geocell-reinforced effect is not obivous while the triaxial strain is relatively samll, and the reinforcing effect of geocell becomes more remarkable along with the increase of axial stain. The coefficients of reinforcing effect are all more than 1. 0. The geocell not only directly reinforce the soil in the cell, but also indirectly restrain the soil around the composite structure of geocell.