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Widening reforming rigidity matching system of hollow slab bridge

A technology of hollow slab bridges and hollow slabs, applied in bridges, bridge maintenance, bridge reinforcement, etc., can solve problems such as sudden changes in stiffness, achieve the effects of reducing vibration displacement difference, overcoming vibration asynchrony, and easy installation

Inactive Publication Date: 2012-07-18
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a rigidity matching system for widening and rebuilding hollow slab bridges, which solves the problem of abrupt change in stiffness between the connecting parts of the old and new bridge slabs during the widening and rebuilding of the hollow slab bridges, and overcomes the unfavorable stress on the single plate at the connecting parts of the old and new hollow slab bridges. Influence, enhance the integrity of the connection between the old and new hollow slab bridges, and improve the construction quality and durability of the widening and reconstruction of hollow slab bridges

Method used

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  • Widening reforming rigidity matching system of hollow slab bridge
  • Widening reforming rigidity matching system of hollow slab bridge
  • Widening reforming rigidity matching system of hollow slab bridge

Examples

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Embodiment 1

[0039] Such as figure 1 , image 3 , Figure 4 , Figure 5 As shown, a rigidity matching system for the widening and reconstruction of hollow slab bridges is suitable for the widening and reconstruction of hollow slab bridges with a span greater than 16m. Bridge, including the old hollow slab bridge side slab 1, the old hollow slab bridge inner slab 2, the new hollow slab bridge side slab 3, the new hollow slab bridge inner slab 4, the old hollow slab bridge side slab 1 and the new hollow slab bridge side slab 3 can be connected by the upper bridge deck pavement connection, or the longitudinal expansion joint connection, or the horizontal connection method of the cast-in-place wet joint connection.

[0040] A total of 5 stiffness matching members 5, 6, 7 are arranged along the transverse direction of the bridge, including the stiffness matching member 5 arranged at the mid-span position, the stiffness matching member 6 arranged at a position L / 4 from the end, and the stiffn...

Embodiment 2

[0050] Such as figure 2 , image 3 As shown, a hollow slab bridge widening and reconstruction stiffness matching system is suitable for the widening and reconstruction of hollow slab bridges with a span less than or equal to 16m. New bridge, including the old hollow slab bridge side plate 1, the old hollow slab bridge inner plate 2, the new hollow slab bridge side plate 3, the new hollow slab bridge inner plate 4, at the old hollow slab bridge side plate 1 and the new hollow slab bridge edge The boards 3 can be connected by pavement on the upper part of the bridge, or provided with longitudinal expansion joints, or horizontally connected by cast-in-place wet joints.

[0051] A total of 3 stiffness matching members 5 and 6 are arranged along the transverse direction of the bridge, including the stiffness matching member 5 arranged at the mid-span position and the stiffness matching member 6 arranged at a position L / 4 from the end. The stiffness matching members 5 and 6 are ma...

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Abstract

The invention provides a widening reforming rigidity matching system of a hollow slab bridge, wherein rigidity matching components are mounted at the part where a new bridge is connected with an old bridge as well as the bottom of a hollow slab in an area adjacent to the connecting part. The rigidity matching components are transversely distributed along the hollow slag bridge, and mounted at the bottoms of side slabs and internal slabs of the new hollow slab bridge and the old hollow slab bridge by connecting components; the quantity of the rigidity matching component is determined by a span L of the hollow slab bridge, while the length of the rigidity matching component is determined by the width of single slabs of the new hollow slab bridge and the old slab bridge. In the widening reforming rigidity matching system provided by the invention, transverse distribution peak value of load can be reduced by the internal force transmitting and rigidity transition of the rigidity matching components, and the transverse distribution curve of the load can be flatten, thus, the purpose of making the rigidity match among various slabs of the new hollow slab bridge and the old slab bridge is achieved, the integrity of transverse connection of the new slab bridge and the old slab bridge is improved, and the problem that the existing method for transversely connecting an upper structure of the hollow slab bridge cannot solve the rigidity mutation appeared in the part where the new slab bridge is connected with the old slab bridge is solved as well.

Description

technical field [0001] The invention belongs to the technical field of bridge widening and reconstruction construction, and in particular relates to a stiffness matching system for widening and reconstruction of hollow slab bridges. Background technique [0002] In recent years, with the rapid development of my country's economy and the substantial increase in car ownership and traffic volume, the traffic capacity of the originally built roads with few lanes has been increasingly unable to meet the requirements, and it needs to be widened and reconstructed. Taking expressways as an example, expressways built in the 1990s generally adopted the design standard of two-way four-lane highways, but most of the actual traffic volume now exceeds the original design maximum traffic volume, and widening and reconstruction are imperative. Bridge widening and reconstruction is the top priority of highway widening and reconstruction projects. Bridge widening and reconstruction can be de...

Claims

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Application Information

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IPC IPC(8): E01D22/00
Inventor 李静斌陈淮王艳高冰葛素娟王辉李亚龙李杰李娜
Owner ZHENGZHOU UNIV
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