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A platform for research: civil engineering, architecture and urbanism
Incremental launching construction method for large, ultrahigh and small-radius circular curve steel box girder
The invention discloses an incremental launching construction method for a large, ultrahigh and small-radius circular curve steel box girder. The incremental launching construction method comprises the following steps that walking type incremental launching equipment and a temporary bearing beam are arranged; the steel box girder is assembled according to a cross slope and a longitudinal slope which are designed according to the girder body during assembly, and the steel box girder is pushed to the temporary bearing beam on the top of an adjacent cover beam through a pushing jack on an assembly jig frame and the walking type incremental launching equipment on the top of the cover beam; curve incremental launching of the steel box girder is carried out; the deviation of the steel box girder is corrected; and incremental launching counterweight of the steel box girder is carried out, according to the segment division of the steel box girder, the walking type advancing distance of the steel box girder and the cantilever length of the steel box girder are planned, and according to the working condition calculation result of each incremental launching of the steel box girder, counterweight adjustment is carried out on the existing negative reaction force working condition and the working condition of unbalanced stress on the inner side and the outer side of the steel box girder. The purposes that the forward bending moment and torque effect of a cantilever state at the box girder end under the incremental launching state of the small-radius steel box girder is overcome, and it is guaranteed that the pressure difference between incremental launching equipment on the inner side and the incremental launching equipment on the outer side is within a certain range are achieved.
本申请公开了一种大超高小半径圆曲线钢箱梁顶推施工方法，包括如下步骤：步履式顶推设备及临时垫梁布置；钢箱梁拼装，拼装时按照梁体设计的横坡和纵坡进行拼装，由拼装胎架上的顶推千斤顶和盖梁顶的步履式顶推设备将钢箱梁顶推至相邻盖梁顶上的临时垫梁上；钢箱梁曲线顶推；钢箱梁纠偏；钢箱梁顶推配重，根据钢箱梁的节段划分，策划钢箱梁步履式前行的距离及钢箱梁的悬臂长度，通过钢箱梁每次顶推的工况计算结果，对存在的负反力工况及钢箱梁内外侧受力不平衡的工况，进行配重调整。本申请达到了克服小半径钢箱梁顶推状态下箱梁端悬臂状态的正向弯矩及扭矩作用，保证内外侧顶推设备的压力差在一定范围的目的。
Incremental launching construction method for large, ultrahigh and small-radius circular curve steel box girder
The invention discloses an incremental launching construction method for a large, ultrahigh and small-radius circular curve steel box girder. The incremental launching construction method comprises the following steps that walking type incremental launching equipment and a temporary bearing beam are arranged; the steel box girder is assembled according to a cross slope and a longitudinal slope which are designed according to the girder body during assembly, and the steel box girder is pushed to the temporary bearing beam on the top of an adjacent cover beam through a pushing jack on an assembly jig frame and the walking type incremental launching equipment on the top of the cover beam; curve incremental launching of the steel box girder is carried out; the deviation of the steel box girder is corrected; and incremental launching counterweight of the steel box girder is carried out, according to the segment division of the steel box girder, the walking type advancing distance of the steel box girder and the cantilever length of the steel box girder are planned, and according to the working condition calculation result of each incremental launching of the steel box girder, counterweight adjustment is carried out on the existing negative reaction force working condition and the working condition of unbalanced stress on the inner side and the outer side of the steel box girder. The purposes that the forward bending moment and torque effect of a cantilever state at the box girder end under the incremental launching state of the small-radius steel box girder is overcome, and it is guaranteed that the pressure difference between incremental launching equipment on the inner side and the incremental launching equipment on the outer side is within a certain range are achieved.
本申请公开了一种大超高小半径圆曲线钢箱梁顶推施工方法，包括如下步骤：步履式顶推设备及临时垫梁布置；钢箱梁拼装，拼装时按照梁体设计的横坡和纵坡进行拼装，由拼装胎架上的顶推千斤顶和盖梁顶的步履式顶推设备将钢箱梁顶推至相邻盖梁顶上的临时垫梁上；钢箱梁曲线顶推；钢箱梁纠偏；钢箱梁顶推配重，根据钢箱梁的节段划分，策划钢箱梁步履式前行的距离及钢箱梁的悬臂长度，通过钢箱梁每次顶推的工况计算结果，对存在的负反力工况及钢箱梁内外侧受力不平衡的工况，进行配重调整。本申请达到了克服小半径钢箱梁顶推状态下箱梁端悬臂状态的正向弯矩及扭矩作用，保证内外侧顶推设备的压力差在一定范围的目的。
Incremental launching construction method for large, ultrahigh and small-radius circular curve steel box girder
大超高小半径圆曲线钢箱梁顶推施工方法
LIU HUI (author) / TIAN LIANMIN (author) / LIU MINGQIANG (author) / LI TENGDA (author) / WU YONGSHENG (author)
2021-10-29
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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