Method for dismantling river-crossing concrete box girder old bridge
A technology for concrete box girders and old bridges, applied in bridges, bridge maintenance, bridge reinforcement, etc., can solve the problems of long demolition time and unusable bridge decks, and achieve the goals of reducing operation risks, saving paving costs, and improving utilization rates Effect
Inactive Publication Date: 2021-07-16
哈尔滨昊宸建研科技有限公司
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Problems solved by technology
[0003] In order to solve the problems that the existing concrete box girder old bridge adopts mechanical crushing method, the existing bridge deck cannot be reused and the demolition time is long, the present invention provides a kind of dismantling of the old concrete box girder bridge across the river method
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Embodiment 1
[0027] Embodiment 1: the following combination figure 1 and figure 2 To illustrate this embodiment, this embodiment relates to a method for dismantling an old concrete box girder bridge across the river, comprising the following steps:
[0028] S1. Remove the auxiliary facilities on the bridge surface;
[0029] S2. Build a platform on each pier column at the bridge head, bridge tail and under the bridge;
[0030] S3, cutting the bridge head and the bridge tail, and separating the bridge deck and pier columns;
[0031] S4. Install jacks on each platform to jack up the bridge deck as a whole, and place pads on each pier column to raise the bridge deck to a thickness higher than the overall bridge deck;
[0032] S5. A support frame is placed at the bottom of the bridge deck. Multiple guide rollers are installed on the top of the support frame. There are two cable-stayed beams fixedly connected to the support frame between two adjacent pier columns. The cable-stay beams are in...
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The invention discloses a method for dismantling a river-crossing old concrete box girder bridge, relates to a bridge dismantling method, and aims to solve the problems that the existing old concrete box girder bridge adopts a mechanical crushing mode, so that the existing bridge floor cannot be recycled due to damage, and the dismantling time is relatively long. The method comprises the following steps that S1, auxiliary facilities on a bridge floor are dismantled; S2, a platform is erected on each pier column at the bridge head, the bridge tail and the lower portion of the bridge; S3, a bridge head and a bridge tail are cut, and a bridge deck and pier columns are separated; S4, a jack is installed and placed on each platform, the whole bridge floor is jacked up, a cushion block is placed on each pier column, and the bridge floor is heightened to be higher than the whole thickness of the bridge floor; and S5, a supporting frame is placed at the bottom of the bridge floor, a plurality of guide carrier rollers are installed on the top of the supporting frame, two inclined pulling beams fixedly connected with the supporting frame are arranged between every two adjacent pier columns, and the inclined pulling beams are arranged in a splayed shape. The material utilization rate is increased, the construction time is shortened, and the dismantling cost is reduced.
Description
technical field [0001] The invention relates to a method for dismantling a bridge, in particular to a method for dismantling an old bridge across a river. Background technique [0002] With the rapid increase of urban traffic volume and traffic axle load, the requirements for bridge traffic capacity and service level have been continuously improved. The structural defects of the concrete box girder bridge itself and the appearance of engineering diseases will further affect the structural safety and normal traffic of the existing concrete box bridges. Therefore, it is necessary to dismantle such box bridges after comprehensive consideration. At present, the main method of bridge demolition is mechanical crushing. First, the bridge deck is dismantled, and then the bridge piers are dismantled. During the dismantling process, the bridge deck needs to be broken as a whole by a crusher, and then hoisted into the transport vehicle for transportation. The disadvantage of this disma...
Claims
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Login to View More IPC IPC(8): E01D24/00
CPCE01D22/00
Inventor 魏晨阳李雪来张士龙李秉德
Owner 哈尔滨昊宸建研科技有限公司