不同连接方式埋地压力管道敷设方向改变时的受力状态研究  

Study on the Stress State of Buried Pressure Pipelines with Different Connections when Laying Direction Changes

作　　者：周晨[1] 郭巍 蒋杰 Zhou Chen;Guo Wei;Jiang Jie(Nanjing Municipal Design&Research Institute Co.,Ltd.,210008,China)

机构地区：[1]南京市市政设计研究院有限责任公司,210008

出　　处：《特种结构》2023年第4期73-79,共7页Special Structures

摘　　要：埋地压力管道敷设方向改变节点处,存在液体压力引起的推力。该推力一般与管道支墩支撑力、横向土壤抗力和纵向管道与土壤间摩擦力共同平衡。本文讨论水平面内不设支墩时,全刚性连接、部分刚性连接以及不承受弯矩的自锚式接口的埋地压力管道,敷设方向改变时,横向抗力与纵向摩擦力的分担比例,讨论中假定管道横向土壤抗力分布符合文克尔模型。本文推荐的解析公式,可以用于确定不同连接方式埋地压力管道敷设方向改变时,满足稳定要求的安全长度。When the laying direction of buried pressure pipelines changes,there is a thrust force caused by the liquid pressure.This thrust force is generally balanced by the pipeline thrust block,lateral soil resistance,and longitudinal frictional between the pipeline and soil.This paper discusses the distribution of lateral soil resistance and longitudinal friction in buried pressure pipelines without a thrust block when the laying direction changes.The analysis considers fully rigid connections,partially rigid connections,and self-anchored joints that do not withstand bending moments.The lateral soil resistance distribution is assumed to follow the Winkel model.The recommended analytical formula can be used to determine the safe length for pipeline stability when the laying direction changes for different connection methods.

关 键 词：刚性连接 自锚式接口 文克尔模型 

分 类 号：TU990.3[建筑科学—市政工程]