Rapid construction method of multi-piece truss steel truss arch ring
A construction method and an arch ring technology, which are applied in the field of bridge engineering, can solve the problems of heavy chord members of an arch ring with two or three trusses, achieve small size and light weight of the arch ring, and solve the transportation problem of the arch ring members. Effect
Active Publication Date: 2020-12-08
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the problem existing in the prior art that as the span of the bridge becomes larger and larger, the size and weight of the arch ring chords of two or three girders become larger and heavier, and the size and weight exceed that of transportation. Due to the limitation of conditions, the rods cannot be transported from the manufacturing plant to the bridge position, and a multi-piece steel truss arch ring with small size, light weight, and easy transportation and installation is required. Rapid construction method of circle
Method used
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Embodiment
[0024] Such as Figure 1-3 As shown, the rapid construction method of a multi-piece truss steel truss arch ring of the present invention comprises the following steps:
[0025] A. Connect the lower chord 12, web 13 and upper chord 11 of each main truss at the bridge position to form each main truss girder;
[0026] B. Install the connecting system between the inner main trusses 1 located inside the arch ring, and use temporary connectors to form single truss segments;
[0027] C. Hoist the single truss segment to the installation position on the bridge, hoist at least one side main truss 2 in order from the inside to the outside until it is flush with the inner main truss 1 on the corresponding side, each side The main girder 2 is connected to the adjacent main girder girders by temporary connectors;
[0028] D. Replace all temporary connectors with high-strength bolts to form arch ring segments and complete the construction.
[0029] As a preferred solution of this embodim...
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The invention discloses a rapid construction method for a multi-main-truss steel truss arch ring. The rapid construction method for the multi-main-truss steel truss arch ring comprises the following steps of A, connecting a lower chord member , a web member and an upper chord member to a bridge site to form each main truss unit; B, mounting bracing systems between internal main trusses on the internal side of the arch ring and connecting the bracing systems by using temporary connecting pieces to form a single truss unit segment; C, hoisting the single truss unit segment to a mounting positionon a bridge and hoisting at least one boundary main truss to be aligned with the internal main truss on the corresponding side in sequence from inside to outside, wherein each boundary main truss isconnected to the adjacent main truss unit by using a temporary connecting piece; and D changing all temporary connecting pieces into high-strength bolts to form an arch ring segment to finish the construction. According to the rapid construction method for the multi-main-truss steel truss arch ring, the multi-main-truss arch ring segments can be safely, economically and rapidly assembled; the dimension of the multi-main-truss arch ring is smaller and the weight of the multi-main-truss arch ring is lighter; the arch ring rod piece transporting problem can be solved; and demands on various transporting conditions can be flexibly met.
Description
technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a rapid construction method for a multi-piece steel truss arch ring. Background technique [0002] Steel arch bridges are the main bridge type of long-span bridges. The arch circle of existing top-supporting steel truss arch bridges has two trusses (such as Xinhegu Bridge and Najiehe Bridge) or three trusses (such as Daning River Bridge). The span of the bridge is getting bigger and bigger, the number of railway lines on the bridge is getting more and more, and the load is getting heavier and heavier. If two or three trusses are used for the top-supported steel truss arch ring, the chords will become larger and larger. The heavier it is, the size and weight exceed the limitation of transportation conditions, the rods cannot be transported from the manufacturing plant to the bridge position, and two-piece or three-piece trusses are not suitable, so a multi-piece truss s...
Claims
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IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor 许志艳余浪许敏易大伟陈克坚游励晖何庭国廖文键黄毅田壮
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD