Assembling and construction method for no-section connection and long-span three-main joist beveled-edge joist steel girder cantilever
A construction method and large-span technology, applied in the direction of bridges, bridge materials, bridge construction, etc., can solve problems such as the accumulation of lower deflection and deformation of rods, and achieve the effects of guaranteed quality, easy construction, and reduced damage.
Active Publication Date: 2010-11-03
1ST ENG OF CHINA ZHONGTIE MAJORBRIDGE GROUP +1
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Problems solved by technology
Existing construction methods cannot solve the problem of accumulation of downward deflection of members with lower elevations before screwing high bolts
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[0009] The cantilever assembly construction method of the large-span three-main truss hypotenuse truss steel girder without section connection system of the present invention includes the following four methods: 1. a single-point counter-rotation method for assembling three main truss hypotenuse trusses in space; 2. large 3. The method of adjusting the cantilever assembly elevation of the three main trusses in space; 4. The construction method of large-span steel girder cantilever assembly, high bolt screwing and steel bridge deck welding.
[0010] 1. A single-point alignment rotation method for the assembly of three main trusses with hypotenuses in space.
[0011] The method includes a diagonal rod assembling method and a diagonal rod assembling method.
[0012] The method for assembling the oblique rod includes the following steps: the first is to lift the oblique rod at a single point on the inner side, and after lifting, the rod is naturally inclined outward, and the singl...
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The invention discloses an assembling and construction method for no-section connection and long-span three-main joist beveled-edge joist steel girder cantilevers. According to construction sequences, the method comprises a single-point contraposition rotation method for space three-main joist beveled-edge joist assembling, an axel deviation method for long-span steel girder cantilever assembling, a method for adjusting elevation of space three-main joist beveled-edge joist assembling and a construction method for long-span steel girder suspension assembling, high-strength bolt screwing and steel bridge panel welding. The invention has simple steps and easy construction, and is very suitable for assembling construction and no-section connection of steel joists with a space three-main joist beveled-edge joist structure, which is long-span cantilever assembling and construction for steel girders; single-point contraposition reduces contraposition difficulty, and rotation and accurate contraposition after single-point contraposition are convenient and fast; and the axel deviation method for long-span steel girder cantilever assembling can overcome the technical problem that the axel of steel girder is greatly influenced by construction and not easy to control and adjust during long-span construction. The invention has the advantages of complete measures, practicality and convenience, safety construction, guarantees quality and the like.
Description
technical field [0001] The invention relates to a large-span steel girder cantilever assembling construction method, in particular to a steel girder assembling construction method in the form of a three-main truss in space and a hypotenuse truss structure without section connection systems. Background technique [0002] With the needs of social and economic development and the development of bridge construction technology, bridge construction has been greatly developed, and my country's bridge construction has also entered the "surpassing" stage, and long-span steel girders are increasingly used in modern bridge construction. In order to fully expand the width of the highway bridge deck, the main truss can adopt a new structural form of three-main sloping side trusses with no section connection system space, and the side trusses are inclined 14.036° to the outside. Due to the large cantilever span of the steel beam and the large self-weight of the bar, the assembly construct...
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IPC IPC(8): E01D21/10E01D101/30
Inventor 王政兵宋杰杨梦纯宋洪喜董政张耀王守昌张鹏李响
Owner 1ST ENG OF CHINA ZHONGTIE MAJORBRIDGE GROUP