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软弱路基上的粒料基层柔性路面,在交通荷载的反复作用下,会产生过量的塑性累积变形。置于基层和土基间的土工格栅,通过接触面摩阻力对基层和土基施加侧向约束,抑制基层塑性变形发展,改善土基表面应力分布。该文应用有限元法分析一土工格栅加筋模型的力学行为,并探讨基层厚度、土基回弹模量、基层-土基回弹模量比、格栅拉伸模量对加筋效果的影响。分析表明:加筋效果同基层厚度、土基回弹模量、基层-土基模量比、筋材拉伸模量密切相关;低模量筋材加筋、基层较厚时,加筋效果明显降低。
The soft grassroots flexible ground on the weak roadbed will produce excessive plastic cumulative deformation under the repeated action of traffic load. The geogrid, which is placed between the grassroots and the soil foundation, exerts lateral restraints on the grassroots and the soil foundation through the frictional resistance of the contact surface to restrain the development of the plastic deformation of the grassroots and to improve the surface stress distribution on the soil foundation. In this paper, the finite element method is used to analyze the mechanical behavior of a geogrid reinforced model. The effects of the thickness of foundation, the modulus of elasticity of soil foundation, Impact. The analysis shows that the reinforcement effect is closely related to the thickness of the basement, the modulus of elasticity of the soil foundation, the ratio of grassroots to the soil-base modulus and the tensile modulus of the tendons. When the modulus of the low modulus reinforcement is thicker and the thickness of the foundation is thicker, the reinforcement effect Obvious reduction.