Box girder steel outer template and construction method thereof
A technology of external formwork and steel formwork, which is applied to bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of poor support handling, high cost, low turnover rate, etc., and achieves the benefits of on-site construction and wide applicability , The effect of small processing difficulty
Active Publication Date: 2014-02-12
CHINA RAILWAY SIXTH GROUP +1
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Problems solved by technology
Conventional box girder external formwork construction usually adopts the form of wooden formwork, which is assembled according to the geometric shape of the external formwork and reinforced with diagonal braces. The disadvantage is that the support is not handled well and it is easy to run out of the formwork, which will seriously affect the appearance quality of the box girder. ; In addition, since the outer formwork is a wooden formwork
Therefore, there are disadvantages such as low turnover rate, large material consumption, high cost, low formwork forming accuracy, and slow assembly and disassembly speed, so it is not conducive to the construction of cast-in-place box girders with long lines
Method used
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[0030] The box girder steel outer formwork and construction method provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0031] Now take a certain project as an example: Beijing Metro Line 14 is an "L"-shaped backbone line of rail transit connecting the northeast and southwest in the Beijing rail transit network. The project is located in Fengtai District, an elevated section, and the starting point pile is K0+ 156.5, the terminal stake number K4+735.055, with a total length of 4.58 kilometers. The viaduct in this section mainly adopts the cast-in-place prestressed concrete box girder with mantanghong brackets. The standard span is 30m, and the span is mainly 30m, supplemented by adjustments of 17m, 23m, 25m, 25.5m, 26.5m, and 26.7m. The beam height is 1.8m, the box girder adopts a single-box single-chamber cross-section, the mid-span web thickness is 0.5m, the thickness of the roof and bot...
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The invention discloses a box girder steel outer template and a construction method thereof. The template comprises a steel truss system, an external template system and a template reinforcement system, wherein the steel truss frame consists of side steel trusses respectively arranged on left and right sides of a bridge; each side steel truss comprises a plurality of steel truss sets arranged in parallel along the longitudinal direction of the bridge and connected sequentially; the external template system consists of a plurality of templates mounted on the surface of the steel truss system; the template reinforcement system consists of a plurality of cross pull rod sets arranged in parallel. According to the box girder steel outer template and the construction method thereof, the integral assembly, regulation and reinforcement of the outer template is performed on a built box girder bracket which is well built, so that the problems such as no bracket support, large material consumption, low template transfer rate and weak appearance quality in the box girder outer template can be solved, an outer template assembly path capable of regulating the size of the template is provided, and the utilization rate of the box girder outer template when quick constructing can be improved. Furthermore, the device can regulate the integral width through the manner of adjusting the cross pull rods, so that convenience and application are achieved.
Description
technical field [0001] The invention belongs to the technical field of bridge construction auxiliary equipment, and in particular relates to a box girder steel outer formwork and a construction method. technical background [0002] With the rapid development of urban construction, people have higher and higher requirements for urban landscape, including the appearance quality of bridges. As one of the important components of the bridge, the box girder is directly presented to people. How to make the shape of the bridge beautiful and smooth has become a topic of discussion among bridge builders. Conventional box girder external formwork construction usually adopts the form of wooden formwork. The wooden formwork is assembled according to the geometric shape of the external formwork and reinforced with diagonal braces. The disadvantage is that if the support is not handled well, it is easy to run out of the formwork, which will seriously affect the appearance quality of the b...
Claims
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Inventor 鹿红雷陈少武滑雪涛常宇刘彬艳王成林
Owner CHINA RAILWAY SIXTH GROUP