渝万铁路局部路基改桥梁方案比选  

Schemes for Transforming Part of Chongqing-Wanzhou Railway Line Subgrade to Bridge

作　　者：王明慧 张桥 季跃华[2] 

机构地区：[1]渝万铁路有限责任公司,重庆410014 [2]中铁大桥局集团有限公司,湖北武汉430050

出　　处：《世界桥梁》2015年第5期11-14,共4页World Bridges

摘　　要：为了降低施工难度、减小施工风险、缩减施工投入,以渝万铁路某段线路为背景,从施工的难易程度、运营后风险、工程造价等因素对路基方案和桥梁方案进行了比选。结果显示:2种方案投资相差不大,桥梁方案可在后期减少维护费用,增加该路段的安全可靠性,且减少占用土地,有较好社会效益。选定的桥梁方案设计为2×32m简支梁桥,采用无后导梁底模平开下承式移动模架架设上部结构。To minimize construction complexity and risks and cut down the construction investment,part of the Chongqing-Wanzhou Railway Line was taken as the study background,the subgrade scheme and bridge scheme were compared from aspects of construction complexity,risks after operation and engineering costs.The results of the study indicate that the two schemes have nearly the same level of investment,but the adaptation of bridge scheme can reduce the later maintenance costs,improve the safety and reliability of this part of railway,reduce the area of land occupied and get better social returns.The selected bridge scheme is a 2×32 msimply-supported beam bridge,the superstructure of which will be erected by using the through movable formwork with horizontally-opened bottom formwork and without rear launching nose.

关 键 词：桥梁 高填方路基 以桥代路 方案比选 简支梁桥 移动模架 

分 类 号：U212.3[交通运输工程—道路与铁道工程]