【摘要】 研究目的:桩板式挡土墙是常用的支挡结构,桩板式挡土墙极限状态设计的研究,是为了考察现行规范设计下,该结构的安全度并给出锚固段极限状态设计表达式。本文通过对桩板式挡土墙研究思路的总结和主要计算结果的分析,为桩板式挡土墙极限状态设计提供参考。研究结论:(1)桩板式挡土墙极限状态设计研究步骤:建立极限状态方程→计算可靠指标并确定目标可靠指标→计算分项系数及建立设计表达式;(2)路肩式桩板墙可靠指标分析表明,可靠指标满足或接近公众需求;(3)桩板墙可参照现行《铁路路基支挡结构设计规范》进行设计,但高边坡路堤和路堑墙应采用较大的荷载分项系数,同时设计中应注意采取减小边坡土压力的措施;(4)提出了路肩式桩板墙锚固段计算的设计表达式及分项系数建议取值;(5)该研究结论可供路肩式桩板墙设计参考。更多还原

【Abstract】 Research purposes;The pile plate retaining wall is a common retaining structure.The research on pile plate retaining wall limit state design is to examine the safety of the structure designed according to the current design specification,and give design expression of anchorage segment limit state.This paper has summed up the research thought of pile plate retaining wall and analyzed the main calculation results,which provides a reference for pile plate retaining wall limit state design.Research conclusions:(1) The research steps of the pile plate retaining wall limit state design are to establish a limit state equation,calculate reliability index and determine the target reliability index,calculate partial coefficient and set up the design expression.(2) The reliability index analysis of shoulder type pile plate retaining wall showed that the reliability index meet or close to the demand of the public.(3) The pile plate retaining wall can be designed with reference to the current code for design of railway retaining structures of railway subgrade,but for the design of the high slope embankment and cutting wall,the partial coefficient of larger loads should be adopted,at the same time in the design attention should be paid to the measures to reduce the earth pressure of slope.(4) The design expression for calculating the shoulder type pile plate retaining wall anchoring segment and recommended values of partial coefficient are proposed.(5) The research conclusion can be used for reference in design of the shoulder type pile plate retaining wall.更多还原