Roughening-free lifting and pressing device for box girder top plate and construction method
A construction method and roof technology, applied in chemical instruments and methods, bridges, bridge materials, etc., can solve problems affecting the construction quality of retarding water flushing construction technology, difficult cleaning of cement slurry, uneven concrete surface, etc., to save labor and machinery use costs, saving materials and labor costs, and good construction quality
Pending Publication Date: 2020-10-16
THE FIRST COMPARY OF CHINA EIGHTH ENG BUREAU LTD
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Problems solved by technology
However, in the actual operation process, due to the different properties of concrete, the selection of water pressure, the ratio of setting retarder, and the selection of dosage greatly affect the construction quality of retarding water flushing construction technology. The concrete surface is uneven, which is likely to cause pollution to the adjacent prefabricated box girders. The cement slurry after water washing is not easy to clean, which has become a common problem in the construction of this process
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[0026] In order to clearly illustrate the technical features of the solution, the solution will be described below through specific implementation modes.
[0027] see Figure 1 to Figure 2 , the embodiment of the present invention provides a chisel-free pressure lifting device for the roof of a box girder, which includes a first pouring layer 2 and a second pouring layer 3 arranged in sequence from bottom to top, located directly above the first pouring layer 2 , the lifting and pressing sieve plate 1 that is arranged in the second pouring layer 3 and whose bottom surface is infinitely close to but not in contact with the top surface of the first pouring layer 2 can be removed, and the lifting assembly that fixes or removes the lifting and pressing sieve plate 1, preferably The concrete matrix composition of the first pouring layer 2 is identical with the concrete matrix composition of the second pouring layer 3, and the second pouring layer 3 sprays retarder to form the secon...
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The invention discloses a roughening-free lifting and pressing device for a box girder top plate and a construction method, which belong to the technical field of building construction. According to the technical scheme, the roughening-free lifting and pressing device for the box girder top plate comprises a first pouring layer and a second pouring layer which are sequentially connected from bottom to top, a lifting and pressing sieve plate which is located over the first pouring layer and is removably arranged in the second pouring layer, and a lifting and pulling assembly for fixing or removing the lifting and pressing sieve plate, and the bottom surface of the lifting and pressing sieve plate is infinitely close to but does not make contact with the top surface of the first pouring layer. The roughening-free lifting and pressing device has the beneficial effects that the roughening-free lifting and pressing device for the box girder top plate is simple in structure, convenient to manufacture and use, capable of well controlling the surface line shape of the box girder top plate, and good in roughening-free construction effect. The roughening-free construction method for the boxgirder top plate is good and stable in construction quality, easy to operate and high in construction efficiency, materials and labor cost are saved, and common problems of traditional delayed coagulation water flushing construction are avoided.
Description
technical field [0001] The invention relates to the technical field of building construction, in particular to a chisel-free pressure-lifting device and a construction method for the roof of a box girder. Background technique [0002] The traditional retarding water flushing method is to use spraying equipment to spray retarder on the surface of concrete or formwork, so that the setting time of concrete within a certain thickness range on the surface of the component is longer than the setting time of the concrete inside the component, forming a time difference. When the concrete inside the component has set but the concrete on the surface has not yet set, wash the concrete on the surface with washing equipment to remove the laitance and part of the fine aggregate on the surface, so that the coarse aggregate is partially exposed (1 / 3 to 1 / 2 grain diameter) to form a rough surface. However, in the actual operation process, due to the different properties of concrete, the sel...
Claims
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IPC IPC(8): E01D21/00E01D2/04E01D101/24B07B1/46
CPCB07B1/4609E01D2/04E01D21/00E01D2101/24
Inventor 李静纪春明鲁凯马云新张旭杨守兴段计伟
Owner THE FIRST COMPARY OF CHINA EIGHTH ENG BUREAU LTD