A construction method for bracketless suspension and locking of prefabricated segmental box girder

A prefabricated, bracket-free technology, used in the erection/assembly of bridges, bridges, bridge construction, etc., can solve problems such as large restrictions, and achieve the effect of firm anchoring, flexible and accurate adjustment

Active Publication Date: 2021-09-24
CHINA CONSTR SENVENTH ENG BUREAU INSTALLATION ENG
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Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a construction method of suspension and locking of an assembled segmental box girder without brackets, so as to solve the problem that the construction method of using the lower bracket system for temporary support in the prior art is greatly restricted and cannot The problem of promoting the application on a large scale

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  • A construction method for bracketless suspension and locking of prefabricated segmental box girder
  • A construction method for bracketless suspension and locking of prefabricated segmental box girder
  • A construction method for bracketless suspension and locking of prefabricated segmental box girder

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Embodiment Construction

[0031] The following is a further detailed description of a prefabricated segmental box girder suspension and locking construction method of the present invention in combination with the accompanying drawings and specific implementation methods:

[0032] as follows figure 1 and 2 As shown, the suspension beam system used for the hoisting of the prefabricated segmental box girder in the present invention includes a suspension beam 3 fixed on the top surface of the zero block 1 on the top of the pier, and a suspension beam 3 supported on the top surface of the suspension beam 3 by a support adjustment mechanism. Frame 4, the lower end of the hanger 4 is fixed to the prefabricated segmental box girder 2, and the three-dimensional coordinates of the hanger 4 are adjusted through the support adjustment mechanism, so that the hanger 4 can be accurately adjusted relative to the suspension frame, thereby realizing the prefabricated segmental box girder 2 Precise adjustment relative t...

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Abstract

The invention belongs to the technical field of bridge construction, and in particular relates to a method for suspending and locking a prefabricated segment box girder without brackets. There are screw jacks and three-way jacks at both ends of the box; (2) hangers are pre-installed on the first pair of prefabricated segment box beams, and the first pair of prefabricated segment box beams are hoisted to the screw jacks; (3) pair of Measure the position of the prefabricated section box girder, use three-way jack instead of screw jack to support the first pair of prefabricated section box girder, and use three-way jack to adjust the prefabricated section box girder; (4) Install the wet joint template; (5) ) pouring wet joints; (6) tensioning the first pair of prefabricated segment box beams; (7) removing and transferring the hangers and suspension beams. The fixed installation of the prefabricated segment beam is not restricted by high piers and complex geological conditions, so that the fixed installation of the prefabricated segment beam can be used in a wide range.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, in particular to an assembly-type segmental box girder suspension and locking construction method without supports. Background technique [0002] With the continuous development of bridge construction technology in our country, the prefabricated prefabricated segmental box girder assembly process has been widely used in urban bridge construction at home and abroad because of its fast, accurate and environmentally friendly characteristics. In the assembly process of the prefabricated segmental box girder, the existing technology usually uses the lower support system as a temporary support. The construction method of the assembled segmental box girder has a stable stress system and is easy to operate. However, its scope of application is limited, and it is difficult to operate under high pier and complex geological conditions, and the cost of use is high. Therefore, the method of using ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00E01D21/10
CPCE01D21/00E01D21/10
Inventor 徐前原福渝李忠明牛敬森贾刚龙刘超张欣张成贵罗海龙
Owner CHINA CONSTR SENVENTH ENG BUREAU INSTALLATION ENG
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