叉河特大橋現澆箱梁掛籃施工方案.doc

現澆箱梁掛籃施工方案

叉河特大橋位于K104+242位置處,為左右分離式，其中左幅布置形式為為25+75+130+75+3×25m，右幅布置形式為75+130+75+3×25m的箱型變截面預應力T型連續剛構橋,箱梁根部高7.5m，跨中高2.6m,箱梁高為梁中線位置的高度，邊中跨比較小為0.5769，這樣將有利于箱梁內的應力合理分布，左右側高度不一，臂長度為3.5m。
    施工中需要隨時對掛籃懸吊系統進行調整，箱梁底板按照R=351.659m變化，底板頂面按照R=391.092m變化，系按照圓曲線變化，這樣設計的目的是減少墩頂的彎矩數值，相應減少主梁內的主拉應力。箱梁采取掛籃懸臂澆筑施工,最大施工懸臂長度為58.5m，最大懸澆重量為142.9t，按照設計的施工順序為:先在墩身托架上澆筑0#段,后向兩邊逐段懸臂澆筑并張拉預應力束,先邊跨合攏,再中跨合攏,整個施工過程相鄰澆筑節段對稱進行。和攏時橋梁由T形靜定懸臂狀態變為超靜定狀態，實現了體系轉換。
砼采用拌合站集中拌制,利用HBT-60型混凝土輸送泵垂直泵送進行箱梁施工.在左2#（右1#）及左3#（右2#）墩柱位置各布置8t塔吊1臺垂直運輸材料、小型設備、機具等。
叉河特大橋施工總工期控制在25個月內。階段目標為：2005年5月前完成樁基礎施工，2005年11月前完成墩柱施工，2006年10月前完成T構懸
Cradle Cast construction plan

Fork River Bridge at K104 +242 position of Department, separate left and right, which left for the site layout for the 25 +75 +130 +75 +3 × 25m, the right site layout for the 75 +130 +75 +3 × 25m of Box T-tapered prestressed continuous rigid frame bridge, box girder high root 7.5m, high span 2.6m, height box beam midline height of the cross-border small as 0.5769, this will be beneficial in Box reasonable distribution of the stress and left side, different height, arm length is 3.5m.
    Construction needs to be kept on the cradle suspension system to adjust, bottom slab in accordance with the R = 351.659m change, the top floor in accordance with R = 391.092m change system in accordance with the circular curve, it is designed to reduce the pier top moment value, a corresponding reduction in the main beam in the main tensile stress. Cantilever box beam construction to Cradle, the biggest construction boom length of 58.5m, the largest Cantilever weight 142.9t, according to the design of the construction sequence is: first pier bracket placement 0 # section, then paragraph by paragraph to both sides of the cantilever placement and prestressed beam, the first Cross Close, and then the cross-fold, the entire construction process symmetric to the adjacent segment placement. And the rope bridge by the T-shaped when Static cantilever into indeterminate state, to achieve a system conversion.
Concentration by mixing concrete mixing plant, using HBT-60-type concrete pump vertical pump for box girder. # 2 in the left (right 1 #) and left 3 # (right 2 #), position the layout of 8t crane Pier 1 set of vertical transport of materials, small equipment, machinery and so on.
Fork River bridge construction control the total duration of 25 months. Stage goal: in May 2005 to complete construction of pile foundation, in November 2005 before the completion of pier construction, completed in October 2006 suspended T structure
Cradle Cast construction plan

Fork River Bridge at K104 +242 position of Department, separate left and right, which left for the site layout for the 25 +75 +130 +75 +3 × 25m, the right site layout for the 75 +130 +75 +3 × 25m of Box T-tapered prestressed continuous rigid frame bridge, box girder high root 7.5m, high span 2.6m, height box beam midline height of the cross-border small as 0.5769, this will be beneficial in Box reasonable distribution of the stress and left side, different height, arm length is 3.5m.
    Construction needs to be kept on the cradle suspension system to adjust, bottom slab in accordance with the R = 351.659m change, the top floor in accordance with R = 391.092m change system in accordance with the circular curve, it is designed to reduce the pier top moment value, a corresponding reduction in the main beam in the main tensile stress. Cantilever box beam construction to Cradle, the biggest construction boom length of 58.5m, the largest Cantilever weight 142.9t, according to the design of the construction sequence is: first pier bracket placement 0 # section, then paragraph by paragraph to both sides of the cantilever placement and prestressed beam, the first Cross Close, and then the cross-fold, the entire construction process symmetric to the adjacent segment placement. And the rope bridge by the T-shaped when Static cantilever into indeterminate state, to achieve a system conversion.
Concentration by mixing concrete mixing plant, using HBT-60-type concrete pump vertical pump for box girder. # 2 in the left (right 1 #) and left 3 # (right 2 #), position the layout of 8t crane Pier 1 set of vertical transport of materials, small equipment, machinery and so on.
Fork River bridge construction control the total duration of 25 months. Stage goal: in May 2005 to complete construction of pile foundation, in November 2005 before the completion of pier construction, completed in October 2006 suspended T structure
Cradle Cast construction plan

Fork River Bridge at K104 +242 position of Department, separate left and right, which left for the site layout for the 25 +75 +130 +75 +3 × 25m, the right site layout for the 75 +130 +75 +3 × 25m of Box T-tapered prestressed continuous rigid frame bridge, box girder high root 7.5m, high span 2.6m, height box beam midline height of the cross-border small as 0.5769, this will be beneficial in Box reasonable distribution of the stress and left side, different height, arm length is 3.5m.
    Construction needs to be kept on the cradle suspension system to adjust, bottom slab in accordance with the R = 351.659m change, the top floor in accordance with R = 391.092m change system in accordance with the circular curve, it is designed to reduce the pier top moment value, a corresponding reduction in the main beam in the main tensile stress. Cantilever box beam construction to Cradle, the biggest construction boom length of 58.5m, the largest Cantilever weight 142.9t, according to the design of the construction sequence is: first pier bracket placement 0 # section, then paragraph by paragraph to both sides of the cantilever placement and prestressed beam, the first Cross Close, and then the cross-fold, the entire construction process symmetric to the adjacent segment placement. And the rope bridge by the T-shaped when Static cantilever into indeterminate state, to achieve a system conversion.
Concentration by mixing concrete mixing plant, using HBT-60-type concrete pump vertical pump for box girder. # 2 in the left (right 1 #) and left 3 # (right 2 #), position the layout of 8t crane Pier 1 set of vertical transport of materials, small equipment, machinery and so on.
Fork River bridge construction control the total duration of 25 months. Stage goal: in May 2005 to complete construction of pile foundation, in November 2005 before the completion of pier construction, completed in October 2006 suspended T structure
Cradle Cast construction plan

Fork River Bridge at K104 +242 position of Department, separate left and right, which left for the site layout for the 25 +75 +130 +75 +3 × 25m, the right site layout for the 75 +130 +75 +3 × 25m of Box T-tapered prestressed continuous rigid frame bridge, box girder high root 7.5m, high span 2.6m, height box beam midline height of the cross-border small as 0.5769, this will be beneficial in Box reasonable distribution of the stress and left side, different height, arm length is 3.5m.
    Construction needs to be kept on the cradle suspension system to adjust, bottom slab in accordance with the R = 351.659m change, the top floor in accordance with R = 391.092m change system in accordance with the circular curve, it is designed to reduce the pier top moment value, a corresponding reduction in the main beam in the main tensile stress. Cantilever box beam construction to Cradle, the biggest construction boom length of 58.5m, the largest Cantilever weight 142.9t, according to the design of the construction sequence is: first pier bracket placement 0 # section, then paragraph by paragraph to both sides of the cantilever placement and prestressed beam, the first Cross Close, and then the cross-fold, the entire construction process symmetric to the adjacent segment placement. And the rope bridge by the T-shaped when Static cantilever into indeterminate state, to achieve a system conversion.
Concentration by mixing concrete mixing plant, using HBT-60-type concrete pump vertical pump for box girder. # 2 in the left (right 1 #) and left 3 # (right 2 #), position the layout of 8t crane Pier 1 set of vertical transport of materials, small equipment, machinery and so on.
Fork River bridge construction control the total duration of 25 months. Stage goal: in May 2005 to complete construction of pile foundation, in November 2005 before the completion of pier construction, completed in October 2006 suspended T structure
Cradle Cast construction plan

Fork River Bridge at K104 +242 position of Department, separate left and right, which left for the site layout for the 25 +75 +130 +75 +3 × 25m, the right site layout for the 75 +130 +75 +3 × 25m of Box T-tapered prestressed continuous rigid frame bridge, box girder high root 7.5m, high span 2.6m, height box beam midline height of the cross-border small as 0.5769, this will be beneficial in Box reasonable distribution of the stress and left side, different height, arm length is 3.5m.
    Construction needs to be kept on the cradle suspension system to adjust, bottom slab in accordance with the R = 351.659m change, the top floor in accordance with R = 391.092m change system in accordance with the circular curve, it is designed to reduce the pier top moment value, a corresponding reduction in the main beam in the main tensile stress. Cantilever box beam construction to Cradle, the biggest construction boom length of 58.5m, the largest Cantilever weight 142.9t, according to the design of the construction sequence is: first pier bracket placement 0 # section, then paragraph by paragraph to both sides of the cantilever placement and prestressed beam, the first Cross Close, and then the cross-fold, the entire construction process symmetric to the adjacent segment placement. And the rope bridge by the T-shaped when Static cantilever into indeterminate state, to achieve a system conversion.
Concentration by mixing concrete mixing plant, using HBT-60-type concrete pump vertical pump for box girder. # 2 in the left (right 1 #) and left 3 # (right 2 #), position the layout of 8t crane Pier 1 set of vertical transport of materials, small equipment, machinery and so on.
Fork River bridge construction control the total duration of 25 months. Stage goal: in May 2005 to complete construction of pile foundation, in November 2005 before the completion of pier construction, completed in October 2006 suspended T structure
Cradle Cast construction plan

Fork River Bridge at K104 +242 position of Department, separate left and right, which left for the site layout for the 25 +75 +130 +75 +3 × 25m, the right site layout for the 75 +130 +75 +3 × 25m of Box T-tapered prestressed continuous rigid frame bridge, box girder high root 7.5m, high span 2.6m, height box beam midline height of the cross-border small as 0.5769, this will be beneficial in Box reasonable distribution of the stress and left side, different height, arm length is 3.5m.
    Construction needs to be kept on the cradle suspension system to adjust, bottom slab in accordance with the R = 351.659m change, the top floor in accordance with R = 391.092m change system in accordance with the circular curve, it is designed to reduce the pier top moment value, a corresponding reduction in the main beam in the main tensile stress. Cantilever box beam construction to Cradle, the biggest construction boom length of 58.5m, the largest Cantilever weight 142.9t, according to the design of the construction sequence is: first pier bracket placement 0 # section, then paragraph by paragraph to both sides of the cantilever placement and prestressed beam, the first Cross Close, and then the cross-fold, the entire construction process symmetric to the adjacent segment placement. And the rope bridge by the T-shaped when Static cantilever into indeterminate state, to achieve a system conversion.
Concentration by mixing concrete mixing plant, using HBT-60-type concrete pump vertical pump for box girder. # 2 in the left (right 1 #) and left 3 # (right 2 #), position the layout of 8t crane Pier 1 set of vertical transport of materials, small equipment, machinery and so on.
Fork River bridge construction control the total duration of 25 months. Stage goal: in May 2005 to complete construction of pile foundation, in November 2005 before the completion of pier construction, completed in October 2006 suspended T structure
Cradle Cast construction plan

Fork River Bridge at K104 +242 position of Department, separate left and right, which left for the site layout for the 25 +75 +130 +75 +3 × 25m, the right site layout for the 75 +130 +75 +3 × 25m of Box T-tapered prestressed continuous rigid frame bridge, box girder high root 7.5m, high span 2.6m, height box beam midline height of the cross-border small as 0.5769, this will be beneficial in Box reasonable distribution of the stress and left side, different height, arm length is 3.5m.
    Construction needs to be kept on the cradle suspension system to adjust, bottom slab in accordance with the R = 351.659m change, the top floor in accordance with R = 391.092m change system in accordance with the circular curve, it is designed to reduce the pier top moment value, a corresponding reduction in the main beam in the main tensile stress. Cantilever box beam construction to Cradle, the biggest construction boom length of 58.5m, the largest Cantilever weight 142.9t, according to the design of the construction sequence is: first pier bracket placement 0 # section, then paragraph by paragraph to both sides of the cantilever placement and prestressed beam, the first Cross Close, and then the cross-fold, the entire construction process symmetric to the adjacent segment placement. And the rope bridge by the T-shaped when Static cantilever into indeterminate state, to achieve a system conversion.
Concentration by mixing concrete mixing plant, using HBT-60-type concrete pump vertical pump for box girder. # 2 in the left (right 1 #) and left 3 # (right 2 #), position the layout of 8t crane Pier 1 set of vertical transport of materials, small equipment, machinery and so on.
Fork River bridge construction control the total duration of 25 months. Stage goal: in May 2005 to complete construction of pile foundation, in November 2005 before the completion of pier construction, completed in October 2006 suspended T structure
 

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