24米箱梁模板設計方案.doc

一、工程概況
    沈客運專線是我國第一條按200Km/h行車速度設計的新建鐵路，其客車最大時速可達250Km/h以上，是我國鐵路建設史上的標志性工程。中鐵大橋局谷城橋梁廠承擔了該線上月牙河特大橋的319孔箱梁的制造任務。其中24m雙線箱梁309孔，20m雙線箱梁10孔。
    秦沈客運專線后張法雙線箱梁是我國首次在鐵路上采用大截面、大體積結構。因此，針對后張法雙線箱梁，鐵道部制定了《預制后張法預應力混凝土簡支梁技術條件》、《橋梁制造與架設施工技術細則》、《秦沈客運專線橋梁工程質量檢驗評定標準》及《預制后張法預應力混凝土簡支梁靜載試驗方法及評定標準》等。這些標準和規范與原T梁箱比，具有設計和制造標準新，科技含量高，吊梁、運梁、存梁的精度要求高，檢驗驗收標準嚴等特點。因此，對箱梁模板的設計，制造與安裝，提出了較高的要求。
二、24米箱梁的主要技術參數
    秦沈客運專線24m雙線后張法預應力混凝土單箱簡支梁,為單箱單室等高度箱梁。梁全長24.6m；跨度24.0m；梁高為2.0m；橋面寬度為12.40m。梁體腹板采用斜截面形式，其坡度為1:10。箱梁底板寬度：中間部分為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
 

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