CN105297641B - Highway T beam diaphragm plate prestressed reinforcement structure and carry out the engineering method reinforced with it - Google Patents
Highway T beam diaphragm plate prestressed reinforcement structure and carry out the engineering method reinforced with it Download PDFInfo
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- CN105297641B CN105297641B CN201510713965.XA CN201510713965A CN105297641B CN 105297641 B CN105297641 B CN 105297641B CN 201510713965 A CN201510713965 A CN 201510713965A CN 105297641 B CN105297641 B CN 105297641B
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Abstract
The invention belongs to highway bridge reinforcing engineering technical field, disclose highway T beam diaphragm plate prestressed reinforcement structure and carry out, with it, the engineering method reinforced.It is mainly characterized in that and includes beam body and diaphragm plate, the direction across bridge both sides of described diaphragm plate and following and diaphragm plate both sides are provided below concrete intensive aspect along bridge to beam body, horizontal bar planting it is provided with between beam body and concrete intensive aspect, vertical bar planting it is provided with bottom beam body, horizontal main reinforcement and the oblate corrugated duct of built-in transverse prestressed muscle it is provided with in concrete intensive aspect, laterally main reinforcement and oblate corrugated duct are connected with horizontal bar planting by big stirrup respectively, it is connected with vertical bar planting by little stirrup, concrete intensive aspect both ends are provided with anchor backing plate, porous flat anchorage.This highway T beam diaphragm plate prestressed reinforcement structure, does not destroy beam body, utilizes prestressing force actively reinforcement technique to solve the transverse splicing disease problem of highway bridge, improves T beam durability.
Description
Technical field
The invention belongs to highway bridge reinforcing engineering technical field, particularly relate to one and utilize prestressing technique, to ill
The diaphragm plate of evil bridge carries out the highway T beam diaphragm plate prestressed reinforcement structure actively reinforced and carries out, with it, the engineering method reinforced.
Background technology
RC T-beam, owing to possessing the advantage such as saving material, stress is clear and definite, it is simple to calculate, construction technology maturation, is
Highway in China applies most Fabricated Simple Supported Beams bridges at present.Meanwhile, along with the various reasons during operation, bridge is caused
The following disease of main generation:
(1) transverse splicing disease: diaphragm plate cracking, junction steel plate sealing-off, fracture；
(2) disease of beam body: the diseases such as the infiltration of bridge wing plate longitudinal cracking, beam-ends diagonal cracking, beam-ends cracking occur；
(3) bearing damage: seat empty, bearing detrusion are excessive.
According to investigations, bridge lateral connection disease is the main disease of T beam, its Major Diseases origin cause of formation: horizontal in building course
The wet seam construction quality of dividing plate is poor and during operation overloaded vehicle more.
After disease occurs in diaphragm plate, becoming as weak part, transverse splicing weakens, and causes superstructure globality stress to subtract
Weak, be equivalent to increase the stress of each single-beam, the injury to bridge is the hugest.
The existing reinforcement means to bridge lateral connection disease has:
(1) affixing steel plate
Use affixing steel plate that diaphragm plate is reinforced, be that steel plate high-strength bolt is fixed on former diaphragm plate, contact
Face uses adhesive bond, reaches the purpose of reinforcement and strengthening；
(2) casting concrete again
Dig out Cast-in-Situ Segment between former diaphragm plate, bar planting, diaphragm plate both sides thickeied, again pour diaphragm plate concrete,
Recover transverse splicing between girder；
(3) reform deck paving
Use the method strengthening deck paving bar diameter that hinge seam cracking disease is repaired, be based on former deck paving
Bar-mat reinforcement intended diameter is too small or grid is excessive, or cuts with scissors, due to what construction quality reason caused, the maintenance stitching cracking disease and carry out
Method.
Above reinforcement means is all directly to set up tension or shearing resistance in the tensile region or shearing resistance weak area being reinforced diaphragm plate
Supporting material, this reinforcement means belongs to passive enforcement category from principle.The strain of rear supporting material, Stress resort and being passively subject to
Power, only undertake mobile load i.e. vehicular load and after add the internal stress of dead load.Thus, the performance of supporting material is difficult to play a role.Want
The fundamental way improving supporting material utilization ratio is to become passive enforcement to reinforce into active, to rear supporting material Shi Hanzhang,
Constitute prestressing force actively reinforcement system.
To being arranged in the supporting material Shi Hanzhang being reinforced on diaphragm plate, form prestressing force actively hardened system, though
So also having use in the transversely strengthening of railroad bridge etc., but the mechanism of action of highway bridge mobile load is more complicated, beam body is transversal
Face is less, it is impossible to wear muscle as railroad bridge punches on web.
Summary of the invention
First technical problem that the invention solves the problems that just is to provide one and carries out highway on the basis of not destroying former beam
The highway T beam diaphragm plate prestressed reinforcement structure that bridge diaphragm plate is actively reinforced.
For solving above-mentioned technical problem, the technical solution used in the present invention is: include beam body and diaphragm plate, described diaphragm plate
Direction across bridge both sides and following and diaphragm plate both sides concrete intensive aspect, beam body and concrete are provided below along bridge to beam body
It is provided with horizontal bar planting between intensive aspect, bottom beam body, is provided with vertical bar planting, in concrete intensive aspect, be provided with horizontal main steel
Muscle and the oblate corrugated duct of built-in transverse prestressed muscle, horizontal main reinforcement and oblate corrugated duct are respectively by big stirrup with horizontal bar planting even
Connecing, be connected with vertical bar planting by little stirrup, concrete intensive aspect both ends are provided with anchor backing plate, porous flat anchorage.
Its additional technical feature is: the end face of described concrete intensive aspect is connected as a single entity with beam body and diaphragm plate, concrete
Beam body bottom surface 10-20cm is protruded in the bottom surface of intensive aspect, and the oblate corrugated duct of built-in transverse prestressed muscle is arranged on protrusion beam body bottom surface
Concrete intensive aspect in；
The peak of described concrete intensive aspect is positioned at edge in beam body web bottom, horse-hof shape beam body；
The surface configuration of described concrete intensive aspect has protective coating.
Second technical problem that the invention solves the problems that just is to provide one highway T beam diaphragm plate prestressed reinforcement structure
Carry out the engineering method reinforced.
For solving above-mentioned technical problem, the technical solution used in the present invention comprises the steps:
The first step cuts the concrete that every diaphragm plate damages, and checks and the reinforcing bar of the interior damage of welding diaphragm plate again；
Second step detects the reinforcing bar in every beam body, avoids the reinforcing bar line in beam body, determines each beam body bar planting position；
3rd step is holed in beam body, and dabbing beam body and new, the old concrete interface of diaphragm plate, makes newly-increased concrete
Intensive aspect and beam body concrete and diaphragm plate concrete can be integrally forming, common stress；
4th step cleaning hole and concrete interface, plants horizontal bar planting, vertical bar planting；
5th step ties up horizontal main reinforcement and the oblate corrugated duct of built-in transverse prestressed muscle under beam body and diaphragm plate, horizontal
It is connected with horizontal bar planting by big stirrup respectively with oblate corrugated duct to main reinforcement, is connected with longitudinal bar planting by little stirrup,
In the 10-20cm that transversely prestressed bars protrudes outside being arranged under beam body edge, and arrange under beam body and diaphragm plate and fix anchor
Lower bolster, porous flat anchorage；
6th step is at beam body and diaphragm plate both sides formwork supporting plate, and horizontal main reinforcement, big stirrup, little stirrup, built-in transverse in advance should
The oblate corrugated duct of power muscle is in template, and casting concrete, form removal to desired strength, curing concrete is to design strength value；
7th step uses post stretching to transversely prestressed bars Shi Hanzhang to design load, and in oblate corrugated duct, perfusion is multiple
Close mortar, be formed with binding prestress structure；
8th step is to the end-blocking protection of prestressed porous flat anchorage, newly-increased diaphragm plate external surface i.e. concrete intensive aspect
Outer surface protective coating, improves durability.
A kind of highway T beam diaphragm plate prestressed reinforcement structure provided by the present invention, includes during construction that increasing diaphragm plate cuts
Face, Shi Hanzhang and structure treatment three phases.Direction across bridge both sides and following and diaphragm plate at equidirectional every diaphragm plate
Both sides are provided below concrete intensive aspect along bridge to beam body, and the end face of concrete intensive aspect is linked as one with beam body and diaphragm plate
Body, the bottom surface protrusion beam body bottom surface 10-20cm of concrete intensive aspect, the peak of concrete intensive aspect is positioned under beam body web
Edge in portion, horse-hof shape beam body, the width position of diaphragm plate both sides, carry out calculating design according to the concrete condition of each bridge.
A kind of highway T beam diaphragm plate prestressed reinforcement structure provided by the present invention, by using equidirectional beam body laterally
Presstressed reinforcing steel is cascaded, simultaneously the mode in increase cross section, diaphragm plate bottom, can effectively reduce diaphragm plate lower edge crack and
Lower edge tension, plus suitable prestressing force on the basis of increasing section, can reduce further diaphragm plate lower edge crack and under
The tension of edge.After diaphragm plate lower edge Shi Hanzhang, in reserved oblate corrugated duct duct, irrigate high performance composite mortar, will
It is bonded as one with concrete intensive aspect, makes rear supporting material active force, by increasing diaphragm plate cross section and newly-increased prestressing force
Effect, improve the duty of beam body.
A kind of highway T beam diaphragm plate prestressed reinforcement structure provided by the present invention, on the basis of not destroying beam body, profit
Solve the transverse splicing disease problem of highway bridge with prestressing force actively reinforcement technique, improve T beam durability and increase reinforcing material
The utilization ratio of material, reduces integrated cost and difficulty of construction, recovers the reinforcing purpose of transverse splicing between girder.This
A kind of highway T beam diaphragm plate prestressed reinforcement structure that invention is provided, one is to strengthen diaphragm plate sectional area, calculates according to design
Result bar planting and layout reinforcing bar, casting concrete, play and strengthen the effect laterally coupling and undertaking pre-loaded support struts.Two is horizontal
Presstressed reinforcing steel is arranged in outside the lower edge of beam body, does not get through hole in beam body, does not destroy the intensity of beam body.The most in advance should with whole
Equidirectional T beam is cascaded and Shi Hanzhang by power muscle, is that a kind of post stretching has bonding external prestressing structure.And it is horizontal
The layout quantity of presstressed reinforcing steel, transversely prestressed bars stretch-draw force value etc., will calculate according to the concrete condition of each bridge
Design.Laterally bar planting, vertical bar planting, horizontal main reinforcement, big stirrup, the material of little stirrup are Q345, the requirement of strength of concrete
Determining according to design calculating, oblate corrugated duct performance indications should meet the regulation of JG225 standard, and anchor backing plate is not less than HT300, many
Hole flat anchorage performance indications should meet the regulation of GB/T14370 standard, and transversely prestressed bars performance indications should meet GB/
The regulation of T5224 standard, the intensity of composite mortar grouting material is not less than M30 level, and water-repellent paint is polyurethanes water-repellent paint, property
Index can should meet II type in GB/T19250, color is the light gray close to beam body.
Accompanying drawing explanation
Structure before the reinforcing of Tu1Wei highway T beam and disease schematic diagram；
Fig. 2 is structure at A and disease enlarged diagram in Fig. 1；
Fig. 3 is that one highway T beam diaphragm plate prestressed reinforcement structure direction across bridge of the present invention increases cross section and transverse prestress newly
The structural representation that muscle is arranged；
Fig. 4 is the structure enlarged diagram in Fig. 3 at B.
Detailed description of the invention
Below in conjunction with the accompanying drawings with embodiment to a kind of highway T beam diaphragm plate prestressed reinforcement structure provided by the present invention
Concrete structure be described further.
As it is shown in figure 1, the highway T beam before Jia Guing includes beam body 1,1 time original multiple diaphragm plate 2 of beam body.
As in figure 2 it is shown, the highway T beam before Jia Guing includes beam body 1,1 time original multiple diaphragm plate 2 of beam body, diaphragm plate 2 damages
Bad concrete 3, the reinforcing bar 4 damaged.
As it is shown on figure 3, one highway T beam diaphragm plate prestressed reinforcement structure of the present invention, direction across bridge includes beam body 1, beam body 1
Under original multiple diaphragm plates 2, below diaphragm plate 2 and diaphragm plate 2 both sides beam body 1 concrete intensive aspect 5 is provided below.
As shown in Figure 4, the direction across bridge both sides of diaphragm plate 2 and following and diaphragm plate 2 both sides are along bridge being provided below to beam body 1
There is concrete intensive aspect 5, between beam body 1 and concrete intensive aspect 5, be provided with horizontal bar planting 6, be provided with bottom beam body 1 and vertically plant
Muscle 7, is provided with the oblate corrugated duct 10 of horizontal main reinforcement 8 and built-in transverse prestressed muscle 9, horizontal main steel in concrete intensive aspect 5
Muscle 8 and oblate corrugated duct 10 are connected with horizontal bar planting 6 by big stirrup 11 respectively, are connected with vertical bar planting 7 by little stirrup 12, mixed
Solidifying soil intensive aspect 5 both ends are provided with anchor backing plate 13, porous flat anchorage 14.
A kind of highway T beam diaphragm plate prestressed reinforcement structure provided by the present invention, includes during construction that increasing diaphragm plate cuts
Face, Shi Hanzhang and structure treatment three phases.Direction across bridge both sides and following and diaphragm plate at equidirectional every diaphragm plate 2
2 both sides are provided below concrete intensive aspect 5 along bridge to beam body 1, the end face of concrete intensive aspect 5 and beam body 1 and diaphragm plate 2
Being connected as a single entity, beam body 1 bottom surface 10-20cm is protruded in the bottom surface of concrete intensive aspect 5, and the peak of concrete intensive aspect 5 is positioned at beam
Edge in body web bottom, horse-hof shape beam body, the width position of diaphragm plate 2 both sides, to carry out according to the concrete condition of each bridge
Calculate design.Specifically comprise the following steps that
The first step cuts the concrete 3 that every diaphragm plate 2 damages, and checks and the reinforcing bar of the interior damage of welding diaphragm plate 2 again
4；
Second step detects the reinforcing bar in every beam body 1, avoids the reinforcing bar line in beam body 1, determines each beam body 1 bar planting position
Put；
3rd step is holed in beam body 1, and dabbing beam body 1 and new, the old concrete interface of diaphragm plate 2, makes newly-increased coagulation
Soil intensive aspect and beam body concrete and diaphragm plate concrete can be integrally forming, common stress；
4th step cleaning hole and concrete interface, plants horizontal bar planting 6, vertical bar planting 7；
5th step ties up horizontal main reinforcement 8 and the oblate corrugated duct of built-in transverse prestressed muscle 9 for 2 times in beam body 1 and diaphragm plate
10, horizontal main reinforcement 8 is connected with horizontal bar planting 6 by big stirrup 11 respectively with oblate corrugated duct 10, by little stirrup 12 with vertical
It is connected to bar planting 7, in the 10-20cm that transversely prestressed bars 9 protrudes outside being arranged in 1 time edge of beam body, and at beam body 1 and tabula
Plate is arranged and fixing anchor backing plate 13, porous flat anchorage 14 for 2 times；
6th step is at beam body 1 and diaphragm plate 2 both sides formwork supporting plate, horizontal main reinforcement 8, big stirrup 11, little stirrup 12, built-in
The oblate corrugated duct 10 of transversely prestressed bars 9 is in template, and casting concrete, form removal to desired strength, curing concrete is to setting
Meter intensity level；
7th step uses post stretching to transversely prestressed bars 9 Shi Hanzhang to design load, irrigates in oblate corrugated duct 10
Composite mortar, is formed with binding prestress structure；
The end-blocking protection of prestressed porous flat anchorage 14, the newly-increased i.e. concrete of diaphragm plate external surface are strengthened by the 8th step
Body 5 outer surface protective coating, improves durability.
A kind of highway T beam diaphragm plate prestressed reinforcement structure provided by the present invention, by using equidirectional beam body 1 laterally
Presstressed reinforcing steel 9 is cascaded, and the mode in increase cross section, diaphragm plate 2 bottom, can effectively reduce diaphragm plate 2 lower edge crack simultaneously
With lower edge tension, plus suitable prestressing force on the basis of increasing section, can reduce further diaphragm plate 2 lower edge crack and
The tension of lower edge.After diaphragm plate 2 lower edge Shi Hanzhang, in reserved oblate corrugated duct 10 duct, irrigate high-performance complex sand
Slurry, is bonded as one it with concrete intensive aspect, makes rear supporting material active force, by increasing diaphragm plate 2 cross section and increasing newly
Prestressed effect, improves the duty of beam body 1.
A kind of highway T beam diaphragm plate prestressed reinforcement structure provided by the present invention, on the basis of not destroying beam body 1,
Utilize prestressing force actively reinforcement technique to solve the transverse splicing disease problem of highway bridge, improve T beam durability and increase reinforcement
The utilization ratio of material, reduces integrated cost and difficulty of construction, recovers the reinforcing purpose of transverse splicing between girder.
A kind of highway T beam diaphragm plate prestressed reinforcement structure provided by the present invention, one is to strengthen diaphragm plate sectional area, according to design meter
Calculate result bar planting and arrange reinforcing bar, casting concrete, playing and strengthen the effect laterally coupling and undertaking pre-loaded support struts.Two is horizontal
It is arranged in presstressed reinforcing steel 9 outside the lower edge of beam body 1, beam body 1 does not gets through hole, do not destroy the intensity of beam body 1.With whole horizontal stroke
Being cascaded by equidirectional T beam to presstressed reinforcing steel 9, Shi Hanzhang, is that a kind of post stretching has bonding external prestressing structure.
And the layout quantity of transversely prestressed bars 9, transversely prestressed bars 9 stretch-draw force value etc., will be according to the concrete condition of each bridge
Carry out calculating design.
A kind of highway T beam diaphragm plate prestressed reinforcement structure provided by the present invention and carry out the engineering method reinforced not only with it
Being limited to said structure, embodiment described above is only to be described the preferred embodiment of the present invention, not to this
Bright scope is defined, and on the premise of designing spirit without departing from the present invention, those of ordinary skill in the art are to the present invention's
Various deformation that technical scheme is made and improvement, all should fall in the protection domain that claims of the present invention determines.
Claims (1)
1. the engineering method reinforced, highway T beam diaphragm plate prestressed reinforcement structure is carried out by highway T beam diaphragm plate prestressed reinforcement structure
Including beam body and diaphragm plate, the direction across bridge both sides of described diaphragm plate and following and diaphragm plate both sides are along bridge being provided below to beam body
There is concrete intensive aspect, be provided with horizontal bar planting between beam body and concrete intensive aspect, bottom beam body, be provided with vertical bar planting, mixed
It is provided with horizontal main reinforcement and the oblate corrugated duct of built-in transverse prestressed muscle, horizontal main reinforcement and oblate corrugated duct in solidifying soil intensive aspect
Being connected with horizontal bar planting by big stirrup respectively, be connected with vertical bar planting by little stirrup, concrete intensive aspect both ends are arranged
There are anchor backing plate, porous flat anchorage；The end face of described concrete intensive aspect is connected as a single entity with beam body and diaphragm plate, and concrete adds
Beam body bottom surface 10-20cm is protruded in the bottom surface of strong body, and the oblate corrugated duct of built-in transverse prestressed muscle is arranged on and protrudes beam body bottom surface
In concrete intensive aspect；The peak of described concrete intensive aspect is positioned at edge in beam body web bottom, horse-hof shape beam body；Described mixed
The surface configuration of solidifying soil intensive aspect has protective coating, it is characterised in that add by highway T beam diaphragm plate prestressed reinforcement structure
Solid engineering method comprise the steps:
The first step cuts the concrete that every diaphragm plate damages, and checks and the reinforcing bar of the interior damage of welding diaphragm plate again；
Second step detects the reinforcing bar in every beam body, avoids the reinforcing bar line in beam body, determines each beam body bar planting position；
3rd step is holed in beam body, and dabbing beam body and new, the old concrete interface of diaphragm plate, makes newly-increased concrete strengthen
Body and beam body concrete and diaphragm plate concrete can be integrally forming, common stress；
4th step cleaning hole and concrete interface, plants horizontal bar planting, vertical bar planting；
5th step ties up horizontal main reinforcement and the oblate corrugated duct of built-in transverse prestressed muscle under beam body and diaphragm plate, laterally leads
Reinforcing bar is connected with horizontal bar planting by big stirrup respectively with oblate corrugated duct, is connected with vertical bar planting by little stirrup, laterally
In the 10-20cm that presstressed reinforcing steel protrudes outside being arranged under beam body edge, and arrange under beam body and diaphragm plate and fix anchor underlay
Plate, porous flat anchorage；
6th step is at beam body and diaphragm plate both sides formwork supporting plate, horizontal main reinforcement, big stirrup, little stirrup, built-in transverse prestressed muscle
Oblate corrugated duct in template, casting concrete, form removal to desired strength, curing concrete is to design strength value；
7th step uses post stretching to transversely prestressed bars Shi Hanzhang to design load, irrigates complex sand in oblate corrugated duct
Slurry, is formed with binding prestress structure；
8th step is to the end-blocking protection of prestressed porous flat anchorage, newly-increased diaphragm plate external surface i.e. concrete intensive aspect appearance
Face protective coating, improves durability.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510713965.XA CN105297641B (en) | 2015-10-29 | 2015-10-29 | Highway T beam diaphragm plate prestressed reinforcement structure and carry out the engineering method reinforced with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510713965.XA CN105297641B (en) | 2015-10-29 | 2015-10-29 | Highway T beam diaphragm plate prestressed reinforcement structure and carry out the engineering method reinforced with it |
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| CN105297641A CN105297641A (en) | 2016-02-03 |
| CN105297641B true CN105297641B (en) | 2016-08-24 |
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| CN105821777A (en) * | 2016-05-13 | 2016-08-03 | 安徽省交通规划设计研究总院股份有限公司 | Prestressed concrete diaphragm for connection of old bridge and new bridge and construction method of prestressed concrete diaphragm |
| CN106087778B (en) * | 2016-05-31 | 2018-03-16 | 西安公路研究院 | The prestressing without bondn of box beam and steel plate concrete composite reinforcement design method |
| CN105970837B (en) * | 2016-05-31 | 2018-03-16 | 西安公路研究院 | The prestressing without bondn of T-shaped beam and steel plate concrete composite reinforcement design method |
| CN106758873A (en) * | 2016-11-11 | 2017-05-31 | 太原理工大学 | A kind of punching prestressing force strengthens the method that diaphragm plate is connected with girder |
| CN107604830A (en) * | 2017-09-19 | 2018-01-19 | 芜湖铁路桥梁制造有限公司 | The reinforcement means of Bridge Crack |
| CN107916625B (en) * | 2017-12-25 | 2023-05-05 | 山西省交通规划勘察设计院有限公司 | Widening structure and method for wide cantilever box girder |
| CN110748185A (en) * | 2019-10-25 | 2020-02-04 | 中国林业科学研究院木材工业研究所 | In-situ bar planting pouring and reinforcing method for partially rotten ancient building wood beam |
| CN114382019B (en) * | 2021-12-30 | 2024-05-24 | 浙江正方交通建设有限公司 | Active T-beam bridge comprehensive reinforcement structure and construction method |
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