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A Repairable Prestressed Concrete T-Girder Bridge

A concrete and prestressed technology, applied in the direction of bridges, buildings, etc., can solve the problems of easy damage, and achieve the effect of convenient transformation and repair, low price, convenient transformation and load lifting

Active Publication Date: 2016-10-05
GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, externally prestressed concrete bridges have their own defects, such as anchors and steering blocks that are easily damaged due to excessive force, and there are no specific regulations in my country's current concrete standards, so there are few new externally prestressed bridges

Method used

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  • A Repairable Prestressed Concrete T-Girder Bridge
  • A Repairable Prestressed Concrete T-Girder Bridge
  • A Repairable Prestressed Concrete T-Girder Bridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as Figure 1-3 As shown, a repairable prestressed concrete T-beam bridge includes a T-beam beam body 3, a middle diaphragm 1 and an end diaphragm 2; wherein, the middle diaphragm 1 adopts an external prestressed The steering block of the rib; the steering block is a rib plate type reinforced concrete block or a block type reinforced concrete block, and a guide pipe 4 is embedded in the block, and the guide pipe 4 is closely connected with the steel bars of the T beam beam body 3; the end The diaphragm 2 adopts an anchor block with external prestressed tendons; the anchor block is a block-type reinforced concrete block with a bellows channel reserved in the block, and the position where the anchor block is connected to the T-beam beam body 3 is set. There are steel angles.

[0037] The internal stirrup reinforcement method of the steering block and the anchor block is determined by using the finite element model combined with the tension and compression rod model, ...

Embodiment 2

[0054] A repairable prestressed concrete T-beam bridge, comprising a T-beam girder body 3, a middle diaphragm 1 and an end diaphragm 2; block; the steering block is a rib plate type reinforced concrete block or a block type reinforced concrete block, and a guide pipe 4 is embedded in the block, and the guide pipe 4 is closely connected with the steel bars of the T beam beam body 3; the end transverse diaphragm 2. An anchor block with external prestressed tendons is used; the anchor block is a block-type reinforced concrete block with a bellows channel reserved in the block, and an angle steel is provided at the position where the anchor block is connected to the T-beam body 3 .

[0055] When the steering block is a ribbed reinforced concrete block, the longitudinal section of the steering block is a ribbed horseshoe-shaped longitudinal section, and the width of the horseshoe is twice the rib width, and the longitudinal area of ​​the horseshoe accounts for 15% of the total longi...

Embodiment 3

[0059] A repairable prestressed concrete T-beam bridge, comprising a T-beam girder body 3, a middle diaphragm 1 and an end diaphragm 2; block; the steering block is a rib plate type reinforced concrete block or a block type reinforced concrete block, and a guide pipe 4 is embedded in the block, and the guide pipe 4 is closely connected with the steel bars of the T beam beam body 3; the end transverse diaphragm 2. An anchor block with external prestressed tendons is used; the anchor block is a block-type reinforced concrete block with a bellows channel reserved in the block, and an angle steel is provided at the position where the anchor block is connected to the T-beam body 3 .

[0060] When the steering block is a ribbed reinforced concrete block, the longitudinal section of the steering block is a ribbed horseshoe-shaped longitudinal section, and the horseshoe width is 3 times the rib width, and the horseshoe longitudinal area accounts for 20% of the total longitudinal area o...

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Abstract

The invention discloses a repairable prestressed concrete T-beam bridge, which comprises a T-beam girder body (3), a middle diaphragm (1) and an end diaphragm (2); wherein, the middle diaphragm (1) and end transverse diaphragm (2) adopt the steering block and anchor block with external prestressed tendons respectively; the steering block is a rib-type reinforced concrete block or a block-type reinforced concrete block, and a guide pipe is embedded in the block (4 ), the guide pipe (4) is closely connected with the reinforcement of the T-beam body (3); the anchor block is a block-type reinforced concrete block with bellows channels reserved in the block, and the anchor block and the T-beam body (3) Angle steel is provided at the connection position. The invention is low in cost, safe and reliable, and can solve the insufficient bridge bearing capacity caused by the loss of prestress and the increase of live load and the increased structural tension required for the temporary passage of heavy-duty vehicles, conveniently realize external prestress reinforcement, and greatly reduce engineering implementation risk.

Description

technical field [0001] The invention belongs to the field of structural design of prestressed concrete T-beam bridges and reinforcement of old bridges, and in particular relates to a repairable prestressed concrete T-beam bridge with a reinforcement device reserved, which can be applied to the structural design of new bridges and existing bridges External prestressing reinforcement technology. Background technique [0002] The external prestressing technology is to place the prestressed tendons outside the concrete beam body, and transmit the force through the end anchorage and the steering block. Compared with the traditional internal prestressed structure, it has the advantages of small cross-sectional size, light weight, replacement of prestressed tendons and It has the advantages of convenient maintenance and management, small prestressed friction loss, short construction period and good durability. However, externally prestressed concrete bridges have their own defects...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D2/00
Inventor 张云周晓蓉马玥
Owner GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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