摘要
重庆—贵阳铁路新白沙沱长江大桥主桥及贵阳岸引桥设计线路受既有川黔线及地形、地貌和桥位资源限制,主桥桥头设计先修建临近旧线的1.26km长施工便线,改移运营列车到施工便线上以后,在旧线路上修建新线桥梁、路基及结构物,两线最远距离30m,属两次临近既有线施工,且旧线旁多为较陡、较高的石质路堑,便线修筑需先行大面积爆破削坡,清除石方,便线既有路堑拓宽施工,又有路堤填筑、帮宽施工,特殊地基段需CFG桩加固处理。重点介绍了合适的便线施工方案、方法,安全合理的防护措施,有效的监测手段,满足施工风险控制要求,使铁路运营和施工作业安全可控。
Because the design line is limited by both the existing railway from Sichuan to Guizhou, topography and room resource, before building the mian bridge and approaching bridge close to Guiyang of new Baishatuo Yangtze River Bridge for the railway from Chongqing to Guiyang, it is necessary to build 1？26km makeshift railway near the existing bridge first, and makes trains running on the makeshift railway, then builds the new bridge, roadbed and structures on the site of the old railway. There is no more than 30m from the old railway to the makeshift railway, engineers have to work close to railway two times which is being used. The rocky cutting slopes of the old railway are precipitous and high, need to cut slopes by blasting rocks in a large area. To build the makeshift railway, the old railway cuttings and embankments will be widened, in some sections, special foundations need to be reinforced by CFG piles. This paper focuses on the right construction methods, safety and reasonable protective measures, effective monitoring means for the railway construction, to meet the requirements of construction risk control, and make sure that the railway operation and construction risks are in the control.
出处
《施工技术》
CAS
北大核心
2014年第17期53-56,共4页
Construction Technology
基金
中铁大桥局科研项目(桥经[2013]148号):双层六线大跨度重载铁路斜拉桥建造技术研究
关键词
公路工程
桥梁工程
斜拉桥
施工便线
施工技术
road construction bridges cable stayed bridges makeshift railway construction
作者简介
李艳哲，教授级高级工程师，E-mail：zzlyz@126．com
