24米箱梁模板设计方案.doc

一、工程概况
    沈客运专线是我国第一条按200Km/h行车速度设计的新建铁路，其客车最大时速可达250Km/h以上，是我国铁路建设史上的标志性工程。中铁大桥局谷城桥梁厂承担了该线上月牙河特大桥的319孔箱梁的制造任务。其中24m双线箱梁309孔，20m双线箱梁10孔。
    秦沈客运专线后张法双线箱梁是我国首次在铁路上采用大截面、大体积结构。因此，针对后张法双线箱梁，铁道部制定了《预制后张法预应力混凝土简支梁技术条件》、《桥梁制造与架设施工技术细则》、《秦沈客运专线桥梁工程质量检验评定标准》及《预制后张法预应力混凝土简支梁静载试验方法及评定标准》等。这些标准和规范与原T梁箱比，具有设计和制造标准新，科技含量高，吊梁、运梁、存梁的精度要求高，检验验收标准严等特点。因此，对箱梁模板的设计，制造与安装，提出了较高的要求。
二、24米箱梁的主要技术参数
    秦沈客运专线24m双线后张法预应力混凝土单箱简支梁,为单箱单室等高度箱梁。梁全长24.6m；跨度24.0m；梁高为2.0m；桥面宽度为12.40m。梁体腹板采用斜截面形式，其坡度为1:10。箱梁底板宽度：中间部分为6.12m
First, project survey
    Shenyang Dedicated Passenger Line is the first article by 200Km / h speed the design of the new railway, its maximum speed of passenger cars up to 250Km / h over the history of railway construction in China landmark projects. China Railway Bridge Authority bridges plant Gokseong online Yueya He assumed that the 319 box girder bridge in the manufacturing task. Which 24m Double Box 309 holes, 20m two-lane box girder 10 holes.
    Shenyang Dedicated Passenger Line post-tensioned two-lane box girder is the first time in the railway section on the use of large, massive structure. Therefore, for the double post-tensioned box girder, the Ministry of Railways to develop a "precast post-tensioned prestressed concrete beams technical conditions", the "bridge construction technology manufacturing and erection details", "Shenyang Dedicated Passenger Railway Bridge Engineering Quality Inspection and Evaluation standard "and" post-tensioned precast prestressed concrete simple Static load test and evaluation standards ". These standards and norms than the original T beam box, with design and manufacturing standards for new, high technology, lifting beam, girder, high precision beam deposit, inspection and acceptance standards and strict and so on. Therefore, the box girder design, manufacture and installation of proposed higher requirements.
2, 24 m box girder of the main technical parameters
    Shenyang Dedicated Passenger Line 24m two-lane single post-tensioned prestressed concrete box beams for the single-box high single-room box. Beam length 24.6m; span 24.0m; beam height is 2.0m; deck width of 12.40m. Beams with inclined web section forms a gradient of 1:10. Bottom slab width: middle part of the 6.12m