Three-span variable-height steel-concrete mixed continuous beam construction method

A technology of mixed continuous and construction methods, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of unfavorable waterway use, large site impact, complex construction technology, etc., and shorten the temporary occupation time and hoisting time Short, the effect of improving the construction accuracy

Pending Publication Date: 2020-08-07
SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Using such a construction method, firstly, the waterway needs to be closed for a long time during the construction period, and the long-term occupation of the waterway is not

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0018] Example: such as Figure 1 to Figure 3 As shown, the construction method of the three-span variable-height steel-concrete hybrid continuous beam in this embodiment is realized by the following steps, taking an actual project as an example:

[0019] 1) Block 0# segment box girder is cast-in-place with cantilever brackets, and temporary locks and caps are fixed in block 0#.

[0020] The construction of block 0# includes the following points: Treatment of pier top: In order to fill the gaps on the side of the pier top support, a half-brick wall can be built on the periphery of the pier top. The height of the brick wall is lower than the top surface of the support 3- 5cm, then fill the gap between the top of the pier with sand and sprinkle water to vibrate, then pour 3-5cm fine-graded concrete, the top surface of the concrete is 2-3mm higher than the support, and finally a layer of butter is applied as the bottom mold of the 0# block . When the system is converted, the brick wall

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Abstract

The invention relates to the technical field of bridge construction, in particular to a three-span variable-height steel-concrete mixed continuous beam construction method which comprises the following steps: firstly, constructing a NO. 0 block of a steel-concrete mixed continuous beam; after completion, symmetrically pouring first to eighth hanging basket cantilevers; after completion, hoisting asteel-concrete combined section; during hoisting, arranging a rhombus hanging basket at the position of an eighth poured beam body section, arranging a hoisting platform on the rhombus hanging basket, wherein the hoisting platform is provided with four hydraulic lifters, and the four hydraulic lifters are used for hoisting the steel box girder of the steel-concrete combined section to a mountingposition of the steel box girder from a river middle girder transporting ship; after the steel box girder is hoisted in place, creating a steel-concrete combined section reinforced concrete structureof the girder section, so that a steel-concrete combined section is formed; removing the temporary lock of the NO. 0 block; constructing a mid-span closure section and forming the three-span variable-height steel-concrete mixed continuous beam. The invention has the advantages that hoisting time is short, the traffic can be opened after the vehicle is in place, the temporary occupation time of roads and navigation channels is shortened, and the adverse effect on social traffic is reduced.

Description

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Claims

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Application Information

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Owner SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD
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