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Self-anchored suspension bridge construction method based on cable-stayed bridge beam forming conversion

A self-anchored suspension bridge and construction method technology, applied in cable-stayed bridges, suspension bridges, bridge forms, etc., can solve the problems of high cost of temporary piers, high risk of temporary pier collision with ships, and high rigidity requirements of temporary piers, and achieve no ship collision. The effect of risk, small change in stress, and no temporary stent cost

Active Publication Date: 2021-12-31
GUANGDONG PROVINCE COMM PLANNING & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rigidity of temporary piers is high, and the cost of temporary piers is high in areas with large main spans or deep water areas, and when there are navigational requirements, the risk of ship collision with temporary piers during construction is greater

Method used

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  • Self-anchored suspension bridge construction method based on cable-stayed bridge beam forming conversion
  • Self-anchored suspension bridge construction method based on cable-stayed bridge beam forming conversion
  • Self-anchored suspension bridge construction method based on cable-stayed bridge beam forming conversion

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The invention discloses a construction method of a self-anchored suspension bridge based on the conversion of a cable-stayed bridge into a girder, comprising:

[0050] Step S1, see figure 2 , the construction forms a temporary cable-stayed bridge consisting of a cable tower 1, a main girder 2 and a plurality of temporary cable-stayed cables 3;

[0051] Step S2, see image 3 , according to the design drawings of the self-anchored suspension bridge, construct the main cable 4 at the corresponding positions on the cable tower 1 and the main girder 2, so that the main cable 4 is in the empty cable state 4A;

[0052] Step S3, see Figure 5 , install a corresponding number of suspenders 5 between the main cable 4 and the main girder 2 according to the installation positions of the suspenders recorded in the design drawings, and remove the temporary stay cables 3 to form the main girder 2 Self-anchored suspension bridges in bare beam state 2B;

[0053] Wherein, the install...

Embodiment approach

[0072] Such as Figure 4 As shown, in the step S3, the installation of the suspender 5 and the removal of the temporary stay cable 3 are carried out in the following manner:

[0073] Divide the main girder 2 into a plurality of sections S along the length direction, and perform operations on each section S, and when performing operations on any one of the sections S, first install the boom 5 located in the section S, and then dismantle it. Temporary stay cables 3 located in the section S;

[0074]In addition, each section S can be operated in any order, but it needs to meet the safe operation conditions: before performing any operation on any of the sections S, first calculate the number of times the main beam 2 installs the suspender 5 in the section S. The maximum negative bending moment of the main beam received is recorded as the maximum negative bending moment of the second main beam. If the maximum negative bending moment of the second main beam exceeds the safety thres...

Embodiment 3

[0078] On the basis of the above-mentioned embodiment 1 or embodiment 2, this embodiment 3 also adopts the following preferred implementation modes:

[0079] Such as figure 1 with figure 2 As shown, in the step S1, after the construction of the cable tower 1 is completed, the main girder 2 and temporary cable-stayed cables 3 are constructed by the cantilever assembly method to form the temporary cable-stayed bridge. Wherein, the beam end anchorage position of the temporary stay cable 3 on the main beam 2 needs to avoid the permanent suspender anchorage point of the suspender 5 on the main beam 2 . The temporary stay cables 3 can be anchored to the cable tower 1 through conventional cable tower anchoring measures such as prestressed tooth plates, steel anchor beams, and pre-embedded wire splitting pipes.

[0080] The above is the basic implementation of the third embodiment, further optimization, improvement and limitation can be done on the basis of the basic implementation...

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Abstract

The invention discloses a self-anchored suspension bridge construction method based on cable-stayed bridge beam forming conversion. The self-anchored suspension bridge construction method comprises the steps that S1, a temporary cable-stayed bridge composed of a cable bent tower, a main beam and a plurality of temporary stay cables is formed through construction; S2, according to a design drawing of the self-anchored suspension bridge, main cables are constructed at the corresponding positions of the cable bent towers and the main beams, so that the main cables are in an empty cable type state; S3, according to the suspender installation positions recorded in the design drawing, suspenders with the corresponding number are installed between the main cable and the main beam, and the temporary stay cables are dismantled to form the self-anchored suspension bridge with the main beam in the bare beam state; and S4, a bridge deck system is constructed on the main beam to complete construction of the self-anchored suspension bridge, and the main beam is in a finished bridge state at the moment. According to the method, support-free construction of the self-anchored suspension bridge can be achieved, the navigation requirement is completely met, the ship collision risk is avoided, and the temporary support cost is avoided.

Description

technical field [0001] The invention relates to the field of bridge design and construction control, in particular to a construction method for a self-anchored suspension bridge based on the beam conversion of a cable-stayed bridge. Background technique [0002] As people have higher and higher requirements for bridge landscapes, and the function of bridges as urban landmarks has become more and more prominent, design units need to provide a wider range of bridge type schemes for construction units to choose from. Ground-anchored suspension bridges have beautiful shapes and good landscape effects. However, due to the need for huge anchors, they are generally only suitable for long-span bridges economically, and their economic competitiveness in medium-span urban landscape bridges is insufficient. Currently, urban landmarks Bridges are generally arch bridges, cable-stayed bridges and self-anchored suspension bridges. [0003] In the airport air take-off and landing area, whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D11/02E01D11/04E01D19/16
CPCE01D21/00E01D11/02E01D11/04E01D19/16
Inventor 梁立农宁立刘明慧张旸郭文华卢绍鸿
Owner GUANGDONG PROVINCE COMM PLANNING & DESIGN INST
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