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Reinforcing method of simply-supported plate beam bridge for heavy-cargo transportation

A simply supported slab and bulky technology, applied in bridge reinforcement, bridges, bridge maintenance, etc., can solve the problem of simply supported slab girder bridges being unable to undertake bulky transportation tasks, and achieve the goal of improving stiffness, convenient construction, and improving integrity. Effect

Active Publication Date: 2016-12-21
SHANGHAI LANGZHAO HIGHWAY & RAILWAY MAINTENANCEENG TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that simply supported slab girder bridges cannot undertake the task of transporting large items, and to provide a reinforcement method for simply supported slab girder bridges for transporting large items

Method used

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  • Reinforcing method of simply-supported plate beam bridge for heavy-cargo transportation
  • Reinforcing method of simply-supported plate beam bridge for heavy-cargo transportation
  • Reinforcing method of simply-supported plate beam bridge for heavy-cargo transportation

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The upper structure of a bridge adopts 4×20m prestressed concrete simply supported hollow slabs, and the lower structure adopts cylindrical piers and pile foundations. Due to the needs of power plant construction, 30 axles of large transport vehicles are required, each axle is 20t, the wheelbase is 1.5m, and the total weight is 600t. The 600t large-scale transportation needs to pass through more than 20 20m prestressed concrete simply supported hollow slab bridges; it has been tested that the 20m prestressed concrete simply supported hollow slab bridges cannot bear large-scale transportation vehicles and need to be reinforced so that the bridge structure can bear large-scale transportation vehicles . Therefore, the method of the present invention is adopted to strengthen the 20m prestressed concrete simply supported hollow slab bridge.

[0036] For the 20m prestressed concrete simply supported hollow slab bridge, the number of axles acting on each slab girder for trans...

Embodiment 2

[0052] The lower part of the target bridge targeted by this embodiment needs to be navigable, so it is impossible to erect supports above the waterway for a long time. In the present embodiment, the procedure adopted is as follows:

[0053] (1) Remove the pavement of the bridge deck, chisel out the hinge joints of the beam and slab, and use planting bars to strengthen; add planting bars to adapt to epoxy mortar or MPC composite materials, etc. After the bonding material is poured, it can prevent cracking, increase the synergy between veneers, and improve the overall bearing capacity of the bridge.

[0054] (2) Lifting equipment is erected at both ends of the beam-slab hinge joint. After the lifting rope passes through the hinge joint, the H-shaped steel beam is hoisted at both ends to the position directly below the hinge joint, and then the high-strength screw is connected to the H-shaped steel beam through the hinge joint. On the upper flange of the beam, a piece of upper s...

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Abstract

The invention discloses a reinforcing method of a simply-supported plate beam bridge for heavy-cargo transportation and belongs to the field of construction methods. According to the method, a high-strength tensile material is arranged at the bottom of the bridge, and the rigidity of the bridge is improved; and hinge joints are filled with high-strength adhesive materials, and the integrity of the bridge is improved. The invention further provides a reinforcing method for the state that a support is not suitable for being erected below the simply-supported plate beam bridge for construction. Lifting equipment is erected at the two ends of a beam plate hinge joint. Lifting ropes are used for lifting an H-shaped steel beam in plate through the hinge joint. A containing cavity is formed among the upper flange of the H-shaped steel beam, a strip-shaped blocking sheet and the beam plate bottom face with the hinge joint. The high-strength adhesive material is poured into the beam plate hinge joint, and the containing cavity and the hinge joint are filled with the high-strength adhesive material. According to the method, the high-strength tensile material is arranged at the bottom of the bridge, so that the rigidity of the bridge is improved; and the hinge joints are filled with the high-strength adhesive materials, the integrity of the bridge is improved, and finally the simply-supported plate beam bridge has the capacity of heavy-cargo transportation.

Description

technical field [0001] The invention belongs to the field of construction methods, and in particular relates to a reinforcement method for a simply supported slab girder bridge used for bulk transportation. Background technique [0002] The maintenance, inspection, repair and reinforcement of bridge structures is one of the important tasks after bridge operation. It is the basis for the maximum use of bridge structures and the guarantee of driving safety. As far as the current situation of road traffic in our country is concerned, the importance and urgency of bridge inspection and reinforcement have become increasingly prominent. Simply supported slab girder bridge is one of the more common bridge forms at present, which has the advantages of low cost and convenient construction. However, its carrying capacity is weak and cannot meet the needs of large-scale transportation. There are many current reinforcement methods, but there are few methods of strengthening the bridge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00E01D1/00
CPCE01D1/00E01D22/00
Inventor 赵伟朱汉华赵永利
Owner SHANGHAI LANGZHAO HIGHWAY & RAILWAY MAINTENANCEENG TECH