Detachment construction method and fixture for temporary support system for precast-small-box-girder hidden capping beam of road bridge

A construction method and technology of small box girders, applied in bridges, bridge construction, bridge maintenance, etc., can solve problems such as inapplicability, improve bridge deck construction efficiency, and be limited to the range of bearing platforms, and achieve good applicability

Active Publication Date: 2020-02-04
NINGBO MUNICIPAL ENG CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the supporting system is designed for the road and bridge construction where the main bridge is a PC hollow slab girder (span 20m, girder height 90cm, single girder weight 22.2 tons), the main bridge is a prefabricated small box girder (90 tons/piece , which is more than three times that of the PC hollow slab girder), such a support system is not applicable due to the limitation of the bearing capacity; in addition, more importantly, the support system is limited to

Method used

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  • Detachment construction method and fixture for temporary support system for precast-small-box-girder hidden capping beam of road bridge
  • Detachment construction method and fixture for temporary support system for precast-small-box-girder hidden capping beam of road bridge
  • Detachment construction method and fixture for temporary support system for precast-small-box-girder hidden capping beam of road bridge

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] like figure 1 As shown, the present embodiment discloses a cantilever support system for the support of road and bridge prefabricated small box girder hidden cover beams; including main beam 11, main pier support system, and side pier support system 34; wherein:

[0075] The main beam 11 is along the lateral side of the road bridge pier (the lateral direction refers to the width direction of the road bridge deck, attached figure 1 The horizontal direction) is arranged in two sections, which are the main beam 11 beam section a supported by the main pier support system, one end supported on the side pier support system 34, and the other end can be connected with the main beam 11 beam section a. The spliced ​​main beam 11 beam section b, the road bridge pier includes the main pier and the side pier; the main pier includes the main pier cap 21 and the main pier column 22 arranged on the main pier cap 21, and the side pier includes the side pier cap 31 and The side pier upr...

Embodiment 2

[0086] like figure 2 As shown, the difference between Embodiment 1 of the present invention and Embodiment 2 is that the support system described in this embodiment is a temporary support system for a prefabricated small box girder type concealed cover girder of a long-span road bridge, wherein: the main girder 11 consists of three sections The main girder sections are spliced ​​together, and the three main girder sections are respectively the main girder section a, the first main girder section b, and the second main girder section b; among them, the main girder section a is assembled with the main truss system ; the first main beam section b, one end is supported on the side pier cap of the first side pier, and the other end is spliced ​​with one end of the main beam section a; the second main beam section b is supported on the second side by one end On the side pier cap of the pier, the other end is spliced ​​with the other end of the main beam section a. In addition, in ...

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Abstract

The invention discloses a detachment construction method and fixture for a temporary support system for a precast-small-box-girder hidden capping beam of a road bridge. The detachment construction method comprises the following steps: (1) detaching a cantilever beam; (2) detaching an abutment pier support system, and loading; (3) detaching an outer-side main beam section connected with the abutment pier support system, and loading; (4) detaching a main beam middle-part beam section connected with a main pier support system, translating and dropping the beam; (5) hoisting a main truss system, laterally dropping the main truss system to the ground, and loading; and (6) detaching a main pier vertical support system and a bearing beam. Therefore, according to the detachment construction methodand fixture, the possibility of rapid detachment for the large temporary support system (the temporary support system for the precast-small-box-girder hidden capping beam of the road bridge) in the projection range of precast small box girders after the precast small box girders are erected, is achieved, and the requirements of traditional large automobile cranes, crawler cranes and other equipment on an operation space are avoided.

Description

technical field [0001] The invention relates to a dismantling construction method, in particular to a dismantling construction method for dismantling a temporary support system of a prefabricated small box girder type hidden cover beam of a road and bridge. [0002] The present invention also relates to a demolition tooling suitable for the above-mentioned demolition and demolition construction method. Background technique [0003] Generally, the estimated cost of using cast-in-place box girders for the main bridge of the same area is greater than that of using prefabricated small box girders. Therefore, in terms of cost savings, choosing prefabricated small box girders for bridge deck construction can greatly reduce construction costs. At the same time, this construction method can also shorten the construction period. [0004] When the bridge deck of the road bridge is constructed with prefabricated small box girders, several prefabricated small box girders parallel to ea...

Claims

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Application Information

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IPC IPC(8): E01D24/00
CPCE01D22/00E01D2/04E01D21/00
Inventor 徐声亮陈巨峰谢含军奚康项志伟叶经斌程启领
Owner NINGBO MUNICIPAL ENG CONSTR GROUP
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