Cast-in-situ construction method of cast-in-situ concrete bridge
A construction method and concrete technology, applied to bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of long construction period, increase of overall construction cost and high cost of cast-in-place concrete bridges, achieve simple preloading construction operations, reduce mechanical The number of shifts meets the effect of linear quality
Active Publication Date: 2014-11-26
CHINA 19TH METALLURGICAL CORP
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Problems solved by technology
This preloading construction method is labor-intensive and time-consuming, the number of mechanical shifts is large, the construction period is long, and the cost is high, which greatly increases the overall construction cost of cast-in-place concrete bridges, which is not conducive to the current low-cost and high-quality requirements of enterprises.
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[0026] Figure 1 to Figure 6 It is a cast-in-place construction method of a cast-in-place concrete bridge provided by the present invention, which is simple in operation, low in construction cost, and can effectively ensure construction quality.
[0027] The cast-in-place construction method of the present invention comprises the following steps,
[0028] 1) Determine the construction plan, draw the construction drawings, determine the cast-in-place construction plan according to the span, longitudinal slope, space height and load value of the concrete bridge, and draw the support construction drawings;
[0029] 2) Determine the number and size of the preloading units of the support characteristic structure. While performing the first step, determine the preloading construction plan according to the bridge span, longitudinal slope, space height and support bearing size. Inside, determine at least three groups of support characteristic structure preloading units 4 composed of ...
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The invention discloses a cast-in-situ construction method of a cast-in-situ concrete bridge, which belongs to the technical field of engineering construction and is simple in operation, low in construction cost and capable of effectively guaranteeing construction quality. The cast-in-situ construction method includes: after erecting a full-space support and before casting in situ, pre-pressing the full-space support by at least three support characteristic structure pre-pressing units consisting of foundations, supports and bottom die systems along the bridge span direction in each bridge span, replacing existing manner of applying pre-pressing load on the full-space support integrally by the manner of applying pre-pressing load on the support characteristic structure pre-pressing units, and acquiring elevation parameters of a cast-in-situ bottom formwork. By the cast-in-situ construction method, pre-pressing construction of acquiring settlement of the foundations and elastic deformation, non-elastic deformation and stability of the supports is simple, convenient and low in cost, and meanwhile, construction quality can be guaranteed.
Description
technical field [0001] The invention relates to a cast-in-place construction method, in particular to a cast-in-place construction method for a cast-in-place concrete bridge, and belongs to the technical field of building construction. Background technique [0002] In modern buildings, especially in the construction of modern highways and railways, all large concrete bridges are usually constructed by cast-in-place construction methods. In this way, before construction, it is necessary to construct a concrete foundation under the concrete bridge that needs to be poured, and then erect a cast-in-place full hall support on the foundation between two adjacent pier columns, and lay a cast-in-place beam on the upper part of the full hall support. Bottom formwork, and then pouring. Moreover, under normal circumstances, when the beam concrete is cast in-situ on the full support, the equal load preload must be carried out before the bridge is poured, so as to eliminate the settleme...
Claims
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IPC IPC(8): E01D21/00
Inventor 张发平
Owner CHINA 19TH METALLURGICAL CORP