施工技术
施工技術
시공기술
CONSTRUCTION TECHNOLOGY
2014年
17期
53-56
,共4页
公路工程%桥梁工程%斜拉桥%施工便线%施工技术
公路工程%橋樑工程%斜拉橋%施工便線%施工技術
공로공정%교량공정%사랍교%시공편선%시공기술
road construction%bridges%cable stayed bridges%makeshift railway%construction
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。
重慶-貴暘鐵路新白沙沱長江大橋主橋及貴暘岸引橋設計線路受既有川黔線及地形、地貌和橋位資源限製，主橋橋頭設計先脩建臨近舊線的1?26km長施工便線，改移運營列車到施工便線上以後，在舊線路上脩建新線橋樑、路基及結構物，兩線最遠距離30m，屬兩次臨近既有線施工，且舊線徬多為較陡、較高的石質路塹，便線脩築需先行大麵積爆破削坡，清除石方，便線既有路塹拓寬施工，又有路隄填築、幫寬施工，特殊地基段需CFG樁加固處理。重點介紹瞭閤適的便線施工方案、方法，安全閤理的防護措施，有效的鑑測手段，滿足施工風險控製要求，使鐵路運營和施工作業安全可控。
중경-귀양철로신백사타장강대교주교급귀양안인교설계선로수기유천검선급지형、지모화교위자원한제，주교교두설계선수건림근구선적1?26km장시공편선，개이운영열차도시공편선상이후，재구선로상수건신선교량、로기급결구물，량선최원거리30m，속량차림근기유선시공，차구선방다위교두、교고적석질로참，편선수축수선행대면적폭파삭파，청제석방，편선기유로참탁관시공，우유로제전축、방관시공，특수지기단수CFG장가고처리。중점개소료합괄적편선시공방안、방법，안전합리적방호조시，유효적감측수단，만족시공풍험공제요구，사철로운영화시공작업안전가공。
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.
