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本文研究了承受由轨道传来的重型滞留超载的背对背连接的土工合成材料加筋土挡墙的设计。挡墙设计中使用了简化法则,应用非线性有限元分析,研究了临界断面。发现背对背连接挡墙的应力、应变场与普通加筋土挡墙的完全不同。然而,如果在所提供的刚度范围内使用土工合成材料加固,那么简化设计准则就给出一种偏小的加筋张力和相对于有限元结果的连结力系数。如果采用金属加筋,有限元分析预测的加筋张力就大得多,这种差异是由于背对背连结挡墙对加筋刚度的依赖性而引起的。
This paper studies the design of geosynthetic reinforced earth retaining walls that bear back-to-back heavy-duty overburden and overloaded by rails. The simplified method is used in the design of the retaining wall. The critical section is studied by nonlinear finite element analysis. It is found that the stress and strain field of back-to-back connecting retaining wall are completely different from that of ordinary reinforced retaining wall. However, if reinforced with geosynthetics over the stiffness range provided, simplifying the design guidelines gives a small, stiffening tension and coefficient of cohesion relative to the finite element results. If metal stiffeners are used, the finite element analysis predicts a much greater amount of stiffened tension due to the dependence of the back-to-back link retaining wall on stiffened stiffness.