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- Title
基于不同路堤加筋形式的土拱效应离散元.
- Authors
曹军; 叶庭; 李潭潭; 王康宇
- Abstract
Based on the Trapdoor model test, two dimensionalization of the biaxial geogrid by MatDEM discrete element software was used to conduct a macro-microscopic analysis of the piled embankment. The soil arching effect and the tension membrane effect generated in the soil under different reinforcing types were investigated from the perspectives of soil arching ratio, displacement, force chain and geogrid force. The results show that the reinforcement can effectively improve the load transfer efficiency of the soil and reduce the differential settlement at the soil surface. Moreover, geotextile can maintain the stability of soil arch structure in soil better than geogrid. When the geogrid reinforcement is used, the foot of the arching is the weak point of force, which is prone to soil collapse and affects the stability of the soil arch structure. When the trapdoor moves down, a semi-circular soil arching is formed in the soil above the reinforcement layer, in which the soil arching effect and the tension membrane effect work together. The contribution of tension membrane effect is also defined to quantiatively assess its effect on the load transfer. The contribution of the tension membrane effect of the geogrid and geotextile in the final state is found to be 40. 78% and 30. 32%, respectively. The results indicates that the soil arching effect plays a major role in the load transfer, and the load transferred by the geogrid is greater than that of the geotextile.
- Publication
Science Technology & Engineering, 2023, Vol 23, Issue 33, p14420
- ISSN
1671-1815
- Publication type
Article