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Reinforcing method for long-span flat arch bridge

A long-span, arch bridge technology, applied in the direction of bridge reinforcement, arch bridges, bridges, etc., can solve the problems of increasing excessive dead load, insignificant bridge reinforcement effect, and increasing difficulty in arch bridge reinforcement.

Inactive Publication Date: 2007-12-26
CHONGQING JIAOTONG UNIVERSITY
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Problems solved by technology

[0002] Among arch bridges, for long-span flat arch bridges with relatively small rise spans, since the horizontal thrust generated by arch bridges is larger than that of steep arches, the load-bearing potential is relatively smaller, and the mechanical behavior of arch bridges tends to be beam bridges, which makes it difficult to reinforce such arch bridges. If conventional reinforcement techniques are adopted, such as bolt-spray enlarging section technology, reinforced concrete hoop reinforcement technology, etc., due to the large span of the bridge, excessive dead load will be added, and the bridge reinforcement effect will not be significant

Method used

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  • Reinforcing method for long-span flat arch bridge
  • Reinforcing method for long-span flat arch bridge

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Embodiment Construction

[0018] As shown in Figure 1-2, the method for reinforcing long-span tank arch bridge of the present invention, it comprises the steps:

[0019] (1) Add support piers: Calculate and analyze according to the internal force of the bridge to be reinforced, so as to determine the number of support piers, the position of each support pier point, and the cross-sectional area of ​​the support piers, and then at the determined support points Casting reinforced concrete pier, the upper end of the reinforced concrete pier should be close to the position of the main arch ring, the upper end of the reinforced concrete pier is a structure with two bifurcations, and the upper surface of the two bifurcations of the reinforced concrete pier is in line with the main arch ring. The distance between the lower surfaces of the arch rings may be 40-100 cm.

[0020] (2) Rigid treatment: To stiffen the main arch ring 2 between the two forks of the pier 1, it is possible to increase the reinforced conc...

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Abstract

The reinforcing method for long-span flat arch bridge includes the following steps: 1. increasing pier through calculation of bridge inner force to determine the position of the support point and depositing reinforced concrete pier in the support point and with the upper end near the main arch; 2. treating the main arch between two support piers with steel; 3. connecting the support piers with the main arch and setting support seat between the main arch and the support piers for hinge; and 4. depositing expansion concrete between the support piers and the main arch to form support. The reinforcing mode of the present invention increases several support points to reduce mobile load bending moment of the bridge by 20-50 % in high effect.

Description

technical field [0001] The invention relates to a method for strengthening an arch bridge, in particular to a method for strengthening a long-span flat-arch bridge and reducing the bending moment value caused by live load. Background technique [0002] Among arch bridges, for long-span flat arch bridges with relatively small rise spans, since the horizontal thrust generated by arch bridges is larger than that of steep arches, the load-bearing potential is relatively smaller, and the mechanical behavior of arch bridges tends to be beam bridges, which makes it difficult to reinforce such arch bridges. If conventional reinforcement techniques are adopted, such as anchor-spray enlarging section technology, reinforced concrete hoop reinforcement technology, etc., due to the large span of the bridge, excessive dead load will be added, and the bridge reinforcement effect will not be significant. Contents of the invention [0003] Aiming at the shortcomings of the above-mentioned ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D22/00E01D4/00
Inventor 周建庭
Owner CHONGQING JIAOTONG UNIVERSITY
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