高速公路中央分隔带既有墩柱防护设计  

The design of existing pier column protection in the central dividing strip of expressways

作　　者：汪子涵 陈典 Wang Zihan;Chen Dian(Survey and Design Company of Sichuan Road&Bridge(Group)Co.,Ltd.,Chengdu Sichuan 610000,China)

机构地区：[1]四川公路桥梁建设集团有限公司勘察设计分公司,四川成都610000

出　　处：《山西建筑》2024年第7期124-127,共4页Shanxi Architecture

摘　　要：针对高速公路中央分隔带既有墩柱防护能力薄弱且受制于建筑限界要求可实施空间不足的问题,现结合实际情况,基于JTG D20—2017公路交通安全设施设计规范以及JTG/T D81—2017公路交通安全设施设计细则提出一种可靠性较高的防护方式:在既有墩柱周围增设一定长度加高直臂型混凝土护栏,通过3 m长变高度过渡段与波形梁护栏连接,混凝土护栏与既有墩柱相接处应根据墩柱实际形状进行特殊设计,在既保证防护能力的同时避免对既有墩柱干扰。In view of the problems of the weak protection capacity of the existing pier columns in the median barrier of the expressway and the insufficient space limited by the building clearance requirements,this article proposes a reliable protection method based on the actual situation,which is in line with the Design Specifications for Highway Safety Facilities(JTG D20—2017)and Design Guidelines for Highway Safety Facilities(JTG/T D81—2017).This method is to add a certain length of straight-arm concrete guardrails around the existing pier columns,and connect them with the wave beam guardrails through a 3 m long variable height transition section.The concrete guardrails should be designed according to the actual shape of the pier columns at the connection point to ensure both protection and avoid interference with the existing pier columns.

关 键 词：高速公路 既有墩柱 建筑限界 直臂型混凝土护栏 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]