机荷高速改扩建工程地面层桥梁拼宽方案研究  

Research on Widening Schemes of Ground Floor Bridge in the Reconstruction and Expansion Project of Ji-He Expressway

作　　者：张腾 欧阳平 张荣洁[2] ZHANG Teng;OUYANG Ping;ZHANG Rong-jie(CCCC First Highway Consultants Co.Ltd.,Xi'an 710075,China;Tan KahKee College,Xiamen University,Zhangzhou 363105,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,西安市710075 [2]厦门大学嘉庚学院,漳州市363105

出　　处：《公路》2023年第7期214-221,共8页Highway

摘　　要：机荷高速既有桥梁已运营23年,主要结构型式有现浇箱梁桥、简支I型梁桥和空心板桥。这3种桥型均具有鲜明的时代特征和地域特点,部分设计理念已经舍弃。本地区同时期建设的同类型桥梁较多,随着社会经济的发展和人们对交通需求的不断提高,同类型桥梁均面临改扩建难题。本研究通过分析既有桥梁结构现状,确定改扩建拼宽设计原则及思路,考虑本项目较高的保通需求以及控制性工期节点,结合维修加固措施,提出了3种桥型不同的拼宽方案。The existing bridges on Ji-He Expressway(Airport-He'ao Expressway) have been in operation for 23 years.Their main structural types include cast-in-place box-beam bridge,simple-supported I-beam bridge and hollow slab bridge.These structural types have distinct characteristics of the times and regions,but some design philosophies have been outdated,and there are still many such bridges of similar types constructed in the same period in this region.With the development of social economy and the continuous improvement of traffic demands,these types of bridges are facing difficulties in reconstruction and expansion.By analyzing the present situation of existing bridge structures,the design principles and ideas of widening for reconstruction and expansion are determined herein.In view of the high demand of maintaining traffic and the controlling construction schedule,three different widening schemes suitable for different bridge types are then proposed in combination with maintenance and strengthening measures.

关 键 词：桥梁改扩建 保通需求 工期节点 拼宽方案 

分 类 号：U445.6[建筑科学—桥梁与隧道工程]