加筋陡坡模型试验及其有限元分析

Study on the Stepped Geogrid Reinforced Soil Retaining Wall by Model Test and Numerical Analysis

为了研究格栅加筋陡坡的力学特性,在室内修筑了加筋陡坡的模型墙。分别测试了挡墙从施工到正常使用期间加筋体内筋带拉力、土压力分布、墙面变形以及地基应力等。并基于自洽理论建立了筋土复合材料力学模型,将计算结果与试验实测结果进行了对比分析,验证了加筋挡土墙结构力学特性和自洽有限元分析方法的可靠性。

In this paper, a Stepped Geogrid Reinforced Soil Retaining Wall has been engaged for studying the mechanical character. It has been measured and analyzed that the pulling force of geobelf, the lateral soil pressure distribution and its changes with the thickness of the earthfill, the deformation of wall surface and the stress of foundation. Meanwhile, numerical nonlinear analysis procedure based on self-consistent finite element method is adopted with the retaining walls in which the effects of both backfills and geogrids can be taken account. Moreover, comparative analysis is demonstrated by the finite element analysis with the structural stress and deformation of reinforcement soil retaining wall. Based on the results and theoretical analysis, these findings will provide more knowledge about geogrids reinforced soil retaining wall, and can be used as reference of general engineering.