基于离心模型试验的土工格室对路基稳定性影响研究

Study on Influence of Geocells on Subgrade Stability Based on Centrifugal Model Test

为了研究不同土工格室加筋情况对路基稳定性的影响,通过采用离心模型试验,分析了未加筋及不同加筋情况对路基沉降和稳定性的影响,通过分析未加筋路基的沉降数据,得出土体的压实沉降主要发生在施工期;对比分析未加筋路基与不同加筋情况路基沉降量,得出加筋能在一定程度减少路基沉降,两层与三层加筋比未加筋路基沉降量减少32%,从施工质量和经济性出发,建议较低路基,进行基底单层土工格室加筋处理,较高路基,在基顶和基底进行两层加筋。

In order to study the effect of different geocell reinforcements on the stability of subgrade,this paper analyzes the effect of unstiffened and different reinforcements on subgrade settlement and stability through the use of centrifugal model test,through analysis of unstiffened roadbed According to the settlement data,it is concluded that the compaction settlement of soils mainly occurs in the construction period;the settlement of roadbeds with different reinforcements and unstiffened roadbeds is compared and analyzed. It is concluded that the reinforcement can reduce the subgrade settlement to a certain degree. Two-layer and three-layer addition The settlement of ribs is reduced by 32% compared with that of unreinforced roadbeds. Starting from construction quality and economy,it is suggested that the lower roadbed be reinforced with basement single-layer geocells,the higher roadbed,and the two floors reinforced at the base top and basement.