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Method for positioning steel reinforcement framework by replacing laminated rubber bearing on bridge abutment of road bridge

A plate type rubber bearing and steel skeleton technology, applied in bridges, bridge maintenance, bridge reinforcement and other directions, can solve the problems of long construction period, occupying large jacks and supporting tools, etc., and achieve the effect of short period and low construction cost.

Inactive Publication Date: 2010-03-17
BEIJING XINSHI ROAD & BRIDGE CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the entire construction process, the height of the main girder is 200-300mm, which requires a large number of jacks and supporting tools, and a long construction period

Method used

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  • Method for positioning steel reinforcement framework by replacing laminated rubber bearing on bridge abutment of road bridge
  • Method for positioning steel reinforcement framework by replacing laminated rubber bearing on bridge abutment of road bridge
  • Method for positioning steel reinforcement framework by replacing laminated rubber bearing on bridge abutment of road bridge

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Embodiment Construction

[0035] Adopt the present invention to replace the plate type rubber bearing on the highway bridge abutment, should according to Figure 1 to Figure 23 Step by step:

[0036] Firstly, an anchorage area is set on the top of the abutment, the old and new concrete in the collapsed part are consolidated together, the concrete in the cracked part is locked together, and support points and welding points are set up for the steel skeleton 12 of the new bearing foundation 16 to be installed. The anchor rod 5 in the anchorage area is made of Φ20 steel bar, and its length is equal to the width of the original abutment top surface, and its top is blade-shaped, and its tail end face is perpendicular to the axial direction of the anchor rod 5. All anchor rods 5 are driven horizontally along the longitudinal bridge, and their tops extend into the abutment backrest 4 within 20mm, and their tail ends are recessed into the abutment facade 2 within 20mm. The anchor hole is made with a pneumatic...

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Abstract

The invention relates to a method for positioning a steel reinforcement framework by replacing a laminated rubber bearing on a bridge abutment of a road bridge. The method comprises the following steps: firstly, an anchorage zone is arranged at the top of the bridge abutment for performing repairing and reinforcement to the part, and a supporting point and a welding point are arranged for a steelreinforcement framework of a new support foundation; after a main girder is jacked up according to a bridge deck construction crown line, an excavation zone is arranged at the part where the support is replaced, and a bed stone on the new support is additionally arranged on the bottom surface of the main girder; a stainless steel frame of the new support foundation and the steel reinforcement framework are mutually matched components; the top level and the inclination angle of the stainless steel frame and the new support foundation are accurately set in the excavation zone along with the accurate alignment of the steel reinforcement framework; the top surface of the new support foundation is parallel to the bottom surface of the bed stone on the new support, and the spacing between the top surface and the bottom surface is equal to the sum of thickness of the new support and 3 mm; the two planes are in horizontal states along the transverse direction; the two planes are parallel to the longitudinal slope of the bridge deck; and all the new supports bear the evenly distributed load under the action of the main girder and are in an ideal working state.

Description

technical field [0001] The invention relates to a construction method for replacing a plate-type rubber support on an abutment of a highway bridge, and the plate-type rubber support supports a prestressed simply supported T-shaped beam or a prestressed continuous box-shaped beam. Background technique [0002] As the load-bearing components of the bridge superstructure, prestressed simply supported T-beams and prestressed continuous box girders are widely used in the construction of highway bridges. On the top of the abutment, the plate rubber bearing supports the main girder of the bridge body. In most cases, these supports are mostly under eccentric compression, especially when the quality of the support installation is poor, this situation is particularly serious. Under the action of vehicle load, the eccentrically compressed support will produce excessive compression deformation and shear deformation, resulting in cracking on the side, exposed steel plates, shortened ser...

Claims

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Application Information

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IPC IPC(8): E01D22/00
Inventor 杨宏量张晓海
Owner BEIJING XINSHI ROAD & BRIDGE CONSTR
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