斜坡段路基椅式桩板支挡结构力学特性分析-《高速铁路技术》

文章信息/Info

Title:: Analysis of Mechanical Characteristics of the Chair-shaped Pile-board Structure in Steep Slope Subgrade

Author(s):: ZHANG Licai; WANG Shunhao; LIU Siyang; JIANG Jingrui; TANG Rui; China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China

Keywords:: high-speed railway|slope subgrade|chair-shaped pile-board structure|mechanical characteristic|numerical analysis

摘要:: 椅式桩板支挡结构是一种根据陡坡地段的特殊要求提出的新型支挡结构，为研究该新型支挡结构在高速铁路陡坡路基段的内力及变形规律，文章采用有限元软件Abaqus建立了陡坡路基段的椅式桩板三维模型进行研究，结果表明：（1）椅式桩板支挡结构构件中横梁受力最为复杂，是支挡结构中的薄弱构件；（2）桩土作用力受到覆土厚度变化的影响较大，桩悬臂段土压力分布近似为抛物线分布；（3）椅式桩板整体结构具有较强的抗变形能力以及整体协同性，能有效维持陡坡的稳定。

Abstract:: The chair-shaped pile plate retaining structure is a new type of retaining structure proposed according to the special requirements of the steep slope section. In order to analyze the internal force and deformation characteristics of the new retaining structure on the steep slope subgrade section of the high-speed railway, the finite element software Abaqus is used in this paper. A three-dimensional calculation model for the chair-shaped pile plate on the steep slope subgrade section is established. The results show that: (1) The cross beam in the chair-shaped pile plate retaining structure is the most complex and the weakest member in the retaining structure; (2) Pile soil force is affected by the change of the soil cover thickness, and the distribution of earth pressure in the cantilever section is approximately parabolic distribution; (3) The chair-shaped pile plate retaining structure has strong resistance to deformation and good cooperating performance, and can effectively maintain the stability of the steep slope.