Temporary space-limiting structure and method for tower girder of super-wide steel box girder cable-stayed bridge with curved tower body
A limit structure, steel box girder technology, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as longitudinal limit failure, large safety risk of cutting temporary consolidation structures, complex force transmission path, etc., to achieve The effect of convenient installation and dismantling, optimized dismantling process, and quick limit method
Active Publication Date: 2022-05-03
CHINA TIESIJU CIVIL ENG GRP CO LTD +1
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Problems solved by technology
In this technical solution, the longitudinal limit uses the vertical fixing device and the vertical effective load, and relies on friction to resist the longitudinal unbalance effect. The disadvantage is that the longitudinal load value is limited only by the friction force, and the requirement for the longitudinal limit load value should not be too large. Otherwise, the longitudinal limit will fail; the longitudinal load is transmitted to the main tower structure through the beam (cantilever and mid-span area), the force transmission path is more complicated, and it is simpler to not directly transmit the longitudinal load to the main tower structure
In addition, when the longitudinal limit is released, there is a greater safety risk in cutting the temporary consolidation structure
Method used
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[0040]The technical solutions in the embodiments of the present invention will be clearly and completely described below, obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0041] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the drawing). If the specific posture changes, the directional indication will also change accordingly.
[0042] In addition, in the present invention, descriptions such as "first", "second" and so on are used for description purposes only, and should not be understood as indicating or ...
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The invention discloses a temporary limit structure and method for a tower girder of an ultra-wide steel box girder cable-stayed bridge with an arc-shaped tower body. Supporting structure, a rigid pad is set between the corbel support structure and the conversion support block, and a support bracket is provided under the conversion support block; the beam end corbel includes a beam end support panel, a beam end stiffener, a reinforced web and a transverse partition plate; the conversion support block includes a curved liner, a tower end stiffener and a tower end support panel. In the present invention, the steel box girder and the main tower curved surface type tower body are effectively connected and load is transmitted by welding the limit corbel, the conversion support block and the rigid pad and leaving the gap value as the tower beam limit device, so as to realize the longitudinal The purpose of the limit is to optimize the operation process of structural system conversion and constraint release after the completion of the bridge; it has the advantages of simple structure, clear force, convenient manufacture, good applicability, easy operation, low input cost, and good promotion prospects.
Description
technical field [0001] The invention belongs to the technical field of bridge construction, and particularly relates to a temporary limit structure and method for a tower girder of an ultra-wide steel box girder cable-stayed bridge with an arc-shaped tower body, which is mainly used for restraining the steel girder of a large-span ultra-wide steel box girder cable-stayed bridge. The longitudinal displacement of the bridge caused by the unbalanced horizontal force generated during the cantilever erection construction stage, the bridge deck pavement construction stage, and the cable debugging stage. Background technique [0002] The current most similar technical scheme tower beam temporary limit measures: [0003] 1) CN104005338A_ a three-way temporary consolidation structure of a long-span cable-stayed bridge tower girder, the invention relates to a three-way temporary consolidation structure of a long-span cable-stayed bridge tower beam, including two tower columns, fixed b...
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IPC IPC(8): E01D21/00E01D2/04
CPCE01D21/00E01D2/04
Inventor 邹孔庆申爱华丁仕洪曹晗时尚刘志招刘果严俊李亚飞肖雄易中楼
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD