楔型柔性搭板作用性状的模型试验与仿真分析

【作者】 张宏光；

【导师】 谢永利；

【作者基本信息】 长安大学 ， 岩土工程， 2004， 硕士

【摘要】 土工格室是一种新型的土工合成材料，目前被广泛应用于土木工程的许多领域。本文针对我国高等级公路路桥过渡段出现桥头跳车病害的现状，土工格室楔形柔性搭板处治方法的应用，通过室内模型试验验证了楔型柔性搭板对于消化由地基沉降所引发的桥台台后填土沉降的有效性，明确了楔型柔性搭板应用于不同土质的差别，应用Marc有限元软件对经过楔型柔性搭板加固的台后填土变形及力学特性进行了数值仿真分析，讨论了桥台台后填土塑性区域开展的特性，由此提出了针对不同土质及不同沉降条件下楔型柔性搭板的设计优化方案。更多还原

【Abstract】 Geocell is a new type of geosynthetics, and at present it has been applied in every field of civil engineering. Directed against the jump disease at abutment joint in the high-grade highway, this paper puts forward the treatment of wedge-shaped flexible approach slab which is consisted of geocell and, through the indoor modeling, proves the effectiveness of wedge-shaped flexible approach slab in absorbing the subsidence of the fill behind abutments caused by subsidence of foundation. After further making clear the differences of applying the wedge-shaped flexible approach slab in different kinds of soil and using Marc program to numerically simulate the deformation and mechanical properties of the fill behind abutments reinforced by wedge-shaped flexible approach slab, this paper gets the characteristics of plastically deforming area in the fill behind abutments under different conditions of subsidence and in different kinds of soil, and accordingly puts forward the designing optimization scheme of wedge-shaped flexible approach slab.更多还原