CN108677757A - The arch bridge reinforcing structure and method of lift structure drag - Google Patents
The arch bridge reinforcing structure and method of lift structure drag Download PDFInfo
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- CN108677757A CN108677757A CN201810393288.1A CN201810393288A CN108677757A CN 108677757 A CN108677757 A CN 108677757A CN 201810393288 A CN201810393288 A CN 201810393288A CN 108677757 A CN108677757 A CN 108677757A
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- arch
- arch springing
- reinforcing bar
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- crown area
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
Abstract
The invention discloses a kind of Arch Bridges Strengthening methods of lift structure drag, include the following steps：(1) reinforcing bar of crown area is welded in vault upper edge surfaces, after the completion in crown area casting concrete, the lightweight concrete layer is laid on the concrete layer steel bar arrangement, then carries out deck paving work；(2) detection calculated bending moment zero line of demarcation；(3) arch springing region upper limb increasing section region is carried out after the completion of the reinforcing bar in arch springing region upper edge surfaces welding arch springing region, steel bar arrangement pours work；(4) casting concrete after the completion of the reinforcing bar in arch springing region lower edge surface soldered arch springing region, steel bar arrangement.The method of the present invention does not increase dead load, increases vault drag；Increase depth of section and area, enhance the drag of arch springing, the increase of arch springing area of section increases the dead weight of arch springing part, plays the role of " pressure arch ", reduces vault sagging moment, realize the purpose for adjusting arch axis pressure line, improve the section resistance of vault.
Description
Technical field
The present invention relates to the maintenance and reinforcement of masonry arch bridge and arch bridge structure design field, more particularly to a kind of lift structure
The arch bridge reinforcing structure and method of drag, this method be by structural strengthening adjust main arch ring internal force with lift structure drag, can
With the spandrel arch coil structures design of the reinforcing of spandrel arch circle and newly-built arch bridge applied to well damage in masonry arch bridge.
Background technology
General arch bridge design mainly considers to allow main arch ring under dead load and the combined load of dead load and main mobile load
Lower arch overlaps (5 coincidence methods) with arch axis pressure line, but long-term operation is lived during the volume of traffic is continuously increased
Load, which is continuously increased, causes arch to be deviated with pressure line, this is the principal element for causing arch bridge to lose, and external appearance characteristic embodies
In arch ring and spandrel construction there are different degrees of damage, some even seriously affects the safe to use of structure.For operation
In endanger, old bridge structure, using remove rebuild or replace beam slab come improve the way of Bridge Design grade not only invest it is huge, also
The problems such as traffic being caused to stagnate.Especially some main arch rings, which do not find apparent disease, bearing capacity still, can meet the trowel used for plastering of needs
Work arch bridge is improved integrality performance of the structure, is restored the effective utilization of original bridge, had by the reinforcement and strengthening to weak component
Apparent economic benefit.
Currently, arch bridge local stiffening renovation technique mainly has：Consolidation by grouting technology, sticking steel plate method for strengthening, to bridge structure
Apply prestressing force etc..Above-mentioned Arch Bridges Strengthening technology have a large amount of engineering experience, especially affixing steel plate, increasing section and
The conventional methods such as grouting technique are used extensively in daily spandrel construction reinforcing engineering, but inappropriate renovation program for reinforcement is not
It is only little to improving structure stress effect, it is also possible to generate negative effect.As grouting technique extremely has to improving bridge capacity
Limit.
Therefore, the masonry arch bridge of apparent disease is not found for main arch ring, it should be as possible from overcoming its major influence factors side
Face is set out, and is tackled the problem at its root, and is restored because mobile load is continuously increased arch is caused to go out with pressure line during runing for a long time
Existing offset, under allowing main arch ring under dead load and the combined load of dead load and main mobile load arch with arch axis pressure line again
Secondary coincidence to effectively solve arch bridge main body mechanism damage problem, and ensures the long-term reliability of structure after reinforcing.
Being disclosed in the information of the background technology part, it is only intended to increase understanding of the overall background of the invention, without answering
It has been the prior art well known to persons skilled in the art when being considered as recognizing or imply that the information is constituted in any form.
Invention content
The purpose of the present invention is to provide a kind of Arch Bridges Strengthening methods of lift structure drag, are adjusted and are led by structural strengthening
Arch ring internal force can effectively enhance main arch ring section resistance, restore and improve the bearing capacity of old bridge.
It is another object of the present invention to provide a kind of arch bridge reinforcing structures of lift structure drag.
To achieve the above object, the present invention provides a kind of arch bridge reinforcing structures of lift structure drag, including：Vault area
Domain ruggedized construction comprising reinforcing bar, concrete layer and lightweight concrete layer, the reinforcing bar are layed in crown area,
The concrete layer is laid on crown area surface, the lightweight concrete layer is laid on the concrete layer；Arch springing region
Upper limb ruggedized construction；It includes reinforcing bar and concrete layer, and the reinforcing bar is layed in the upper edge surfaces in arch springing region, adopts
With triangle gradual change type, the concrete layer is laid on arch springing region upper edge surfaces；And arch springing region lower edge ruggedized construction,
Including reinforcing bar and concrete layer, the reinforcing bar is layed in the lower edge surface in arch springing region, and the concrete layer is laid with
On arch springing region lower edge surface.
Preferably, further include reinforcing layer in above-mentioned technical proposal, be laid on crown area lower edge surface.
A kind of Arch Bridges Strengthening method of lift structure drag, includes the following steps：
(1) reinforcing bar of crown area is welded in vault upper edge surfaces, is poured in crown area after the completion of steel bar arrangement
Then concrete uses lightweight concrete replacement is original to banket, then carries out deck paving work；
Vault pours certain thickness concrete, and for improving, section resistance is appropriate simultaneously to increase depth of section；Vault area
Domain, which pours lightweight concrete, bankets to original vault and is replaced, and on the one hand increases depth of section and improves section resistance, another party
Face can effectively mitigate vault load again, and vault internal force is adjusted.Make vault area in the case where hardly increasing dead weight
Domain pours certain thickness concrete and pours lightweight concrete one stress entirety of formation with crown area, and it is whole to reach increase structure
Body height increases depth of compressive zone, to solve vault upper limb compression excessive problem, can also play and adjust main arch ring internal force
Effect.
(2) detection calculated bending moment zero line of demarcation, which is the boundary of crown area and arch springing region
Line；
(3) in the reinforcing bar in arch springing region upper edge surfaces welding arch springing region, the thickness of the reinforcing bar uses triangle
Shape gradual change type, arch springing region upper limb increasing section region is carried out after the completion of steel bar arrangement pours work；
Arch springing region upper limb reinforcing bar, is effectively increased depth of section and area, greatly built in the upper limb of arch springing region
Enhance the drag of arch springing, while the form in arch springing region upper limb increasing section region is to use the more effective adjustment structure of triangle
Internal force, specifically pour size and be subject to and calculate.The increase of arch springing area of section increases the dead weight of arch springing part, plays
The effect of " pressure arch ", reduces vault sagging moment.
(4) casting concrete after the completion of the reinforcing bar in arch springing region lower edge surface soldered arch springing region, steel bar arrangement,
Concrete needs the perishable structure of easily getting rusty such as fully wrapped around reinforcing bar；
Arch springing region lower edge reinforcing bar, the measure can increase depth of section and area built in the lower edge of arch springing region, greatly
Enhance the drag of arch springing, the increase of arch springing area of section increases the dead weight of arch springing part, plays the role of " pressure arch ", adjusts
Structural internal force has been saved, vault sagging moment is reduced.
Preferably, in above-mentioned technical proposal, the Arch Bridges Strengthening method of the lift structure drag further includes step (5),
Crown area lower edge is laid with reinforcing layer.
Preferably, it is to use high performance carbon cloth matching tree that reinforcing layer is laid in above-mentioned technical proposal, in step (5)
Fat impregnates gluing knot in the surface of crown area lower edge concrete component.High performance carbon cloth auxiliary resin impregnates gluing knot
Reach enhancing component load-bearing using the good tensile strength of carbon fibre material in the surface of crown area lower edge concrete component
The purpose of ability and intensity；Not only can achieve the effect that improve structure tensile strength, but also since the characteristic of material itself makes increase
Dead load can be ignored.
Preferably, it is that steel plate is bonded in crown area lower edge to mix that reinforcing layer is laid in above-mentioned technical proposal, in step (5)
The surface of solidifying soil component.The higher material of adhesive tensile resistance intensity may be used and carry out consolidation process, can both reach raising structure
The effect of tensile strength, and since the characteristic of material itself makes increased dead load can be ignored.Steel plate then has good
Grinding performance well, good heat treatment dimensional stability, good toughness, good red hardness, good wearability.
Preferably, in above-mentioned technical proposal, the concrete poured in step (1) is normal concrete, casting concrete
Thickness is 8-15cm.
Preferably, in above-mentioned technical proposal, before carrying out step (1), arch rib lower rim is surveyed in bridge upstream and downstream both sides
Edge line coordinates carries out decile according to the arch feather edge line coordinates of actual measurement.
The Arch Bridges Strengthening method of lift structure drag of the present invention, principle are as follows：
As seen from Figure 1, in figure shown in 1-a it is arch axis displacement deformation amount in the case of normal load；It is shown in 1-b in figure
I.e. mobile load is continuously increased arch axis misalignment during the volume of traffic is continuously increased for long-term operation, at this time vault lower edge and arch springing
Upper limb generates larger tensile stress, causes displacement larger, main arch ring will appear damaged condition；Main arch ring shown in Fig. 1-c is
After processing method through the invention, vault drag is increased while not increasing structural bearing capacity, while increasing arch springing
Bearing capacity, improve and a degree of displacement deformation for having restored original structure, control structure continue damage while change
The whole stressing conditions of structure have been apt to it, have enable bridge in the case of relatively low reparation fund input, has continued safety and be open to traffic.
Crown area pours certain thickness concrete and is used for improving section resistance appropriate increase depth of section simultaneously；Vault
Region, which pours lightweight concrete, bankets to original vault and is replaced, and on the one hand increases depth of section and improves section resistance, another
Aspect can effectively mitigate vault load again, and vault internal force is adjusted.Reach increasing in the case where hardly increasing dead weight
Add structure whole height, increase depth of compressive zone, to solve vault upper limb compression excessive problem, adjusting master can also be played
The effect of arch ring internal force.Arch springing region upper limb increasing section region is effectively increased depth of section and area, greatly enhancing arch
The drag of foot.Arch springing region lower edge increasing section region is equally to increase depth of section and area, greatly enhances the drag of arch springing.
The increase of arch springing area of section increases the dead weight of arch springing part, plays the role of " pressure arch ", reduces vault sagging moment.
Crown area lower edge reinforcing layer is used for the reinforcing of crown area lower edge, and the higher material of adhesive tensile resistance intensity may be used and added
Gu processing can not only achieve the effect that improve structure tensile strength, but also since the characteristic of material itself makes increased dead load
It can be ignored.
Compared with prior art, the present invention has the advantages that：
(1) arch bridge reinforcing structure of lift structure drag of the invention, in crown area upper limb replace it is original banket, plant
Muscle thickeies force structure, predominantly increases structure whole height, increases depth of compressive zone, vault dead weight is reduced, to solve to encircle
Push up upper limb compression excessive problem.In crown area lower edge (near vault to 1/4 across footpath, be subject to practical calculating) using reinforcing
Layer, to improve structure tensile capacity.To the processing of arch springing (1/4 across footpath nearby arrives arch springing, be subject to practical calculating), in arch springing area
Domain upper limb thickeies section, increases depth of section, increases drag.Using moment of flexure zero as separation, increase arch ring lower edge section, increases
Drag.
(2) the Arch Bridges Strengthening method of lift structure drag of the present invention, the processing to crown area and crown area lower edge, no
Increase dead load, added burden will not be caused to mechanism.Thoroughly improve section, significantly increases vault drag；At reinforcing layer
Reason increases the bending resistance in arch ring section, the ability of drawing.Processing to arch springing can increase depth of section and area, greatly enhancing arch
The drag of foot, the increase of arch springing area of section increase the dead weight of arch springing part, play the role of " pressure arch ", reduce arch
Sagging moment is pushed up, the purpose for adjusting arch axis pressure line is realized, improves the section resistance of vault.
Description of the drawings
Fig. 1 is the structural schematic diagram of arch bridge arch axis denaturation displacement；
Wherein, Fig. 1-a are arch axis displacement deformation amount in the case of normal load；
It is that i.e. mobile load is continuously increased arch axis displacement during the volume of traffic is continuously increased for long-term operation shown in 1-b in figure
Situation；
The case where main arch ring shown in Fig. 1-c is the arch axis after Arch Bridges Strengthening method of the present invention processing.
Fig. 2 is the structural schematic diagram of the arch bridge reinforcing structure of lift structure drag according to the present invention.
Fig. 3 is the partial structural diagram of the arch bridge reinforcing structure of lift structure drag according to the present invention.
Fig. 4 be lift structure drag according to the present invention arch bridge reinforcing structure in the I-shaped conversion main arch ring in crown area
The structural schematic diagram of section.
Fig. 5 be lift structure drag according to the present invention arch bridge reinforcing structure in the I-shaped conversion main arch ring in arch springing region
The structural schematic diagram of section.
Fig. 6 is the structural schematic diagram according to embodiment water river in Shangdong Province bridge bridge type.
Specific implementation mode
Below in conjunction with the accompanying drawings, the specific implementation mode of the present invention is described in detail, it is to be understood that the guarantor of the present invention
Shield range is not restricted by specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " comprising " or its change
It changes such as "comprising" or " including " etc. and will be understood to comprise stated element or component, and do not exclude other elements
Or other component parts.
As shown in Figures 2 to 6, according to a kind of Arch Bridges Strengthening knot of lift structure drag of the specific embodiment of the invention
Structure, including：Crown area ruggedized construction 1 comprising reinforcing bar 11, concrete layer 12 and lightweight concrete layer 13, reinforcement steel
Muscle 11 is layed in crown area, and concrete layer 12 is laid on crown area surface covering reinforcing bar 11, utilizes on this basis
Lightweight concrete backfill replacement is original to banket, and forms lightweight concrete layer 13.In crown area upper limb replace it is original banket, plant
Muscle thickeies force structure, predominantly increases structure whole height, increases depth of compressive zone, vault dead weight is reduced, to solve to encircle
Push up upper limb compression excessive problem.Arch springing region upper limb ruggedized construction 2 includes reinforcing bar 21 and concrete layer 22, reinforcing bar
21 are layed in the upper edge surfaces in arch springing region, and using triangle gradual change type, concrete layer 22 is laid on arch springing region upper edge surfaces.
Arch springing region lower edge ruggedized construction 3 includes reinforcing bar 31 and concrete layer 32, and reinforcing bar 31 is layed under arch springing region
Edge surface, concrete layer 32 are laid on arch springing region lower edge surface.(arch springing is arrived, with reality to the processing of arch springing near 1/4 across footpath
Subject to calculating), in arch springing region, upper limb thickeies section, increases depth of section, increases drag.Moment of flexure zero is determined, with moment of flexure zero
Point is line of demarcation 4, increases arch ring lower edge section, increases drag.Reinforcing layer 5 is laid on crown area lower edge surface.In vault area
Domain lower edge (near vault to 1/4 across footpath, be subject to practical calculating) uses reinforcing layer, to improve structure tensile capacity.
Specific Arch Bridges Strengthening method is as follows：
A kind of Arch Bridges Strengthening method of lift structure drag, includes the following steps：
(1) reinforcing bar 11 of crown area is welded in crown area upper edge surfaces, after the arrangement of reinforcing bar 11 is completed
It carries out crown area and pours certain thickness concrete, it is preferred that select normal concrete, form concrete layer 12, thickness control
System is in 8-15cm, it is preferable that related specification requirement will be met by being preferred protective layer thickness with 12 centimeters or so；Utilize lightweight concrete
Backfill carries out backfill and pours work, and replacement is all original to banket, and forms concrete layer 13.It completes crown area and pours certain thickness
Concrete, crown area pour lightweight concrete pour the making work for carrying out deck paving after work again.
Vault pours certain thickness concrete, and for improving, section resistance is appropriate simultaneously to increase depth of section；Vault area
Domain, which pours lightweight concrete, bankets to original vault and is replaced, and on the one hand increases depth of section and improves section resistance, another party
Face can effectively mitigate vault load again, and vault internal force is adjusted.Make vault area in the case where hardly increasing dead weight
Domain pours certain thickness concrete and pours lightweight concrete one stress entirety of formation with crown area, and it is whole to reach increase structure
Body height increases depth of compressive zone, to solve vault upper limb compression excessive problem, can also play and adjust main arch ring internal force
Effect.
(2) detect calculated bending moment zero, using moment of flexure zero as line of demarcation 4, the moment of flexure zero line of demarcation be crown area with
The line of demarcation in arch springing region；
(3) in the reinforcing bar 21 in arch springing region upper edge surfaces welding arch springing region, the thickness of the reinforcing bar uses three
Angular gradual change type, carries out the work that pours in arch springing region upper limb increasing section region after the completion of steel bar arrangement, after casting concrete
Concrete layer 22 is formed, protective layer thickness will meet related specification requirement；
Arch springing region upper limb reinforcing bar, is effectively increased depth of section and area, greatly built in the upper limb of arch springing region
Enhance the drag of arch springing, while the form in arch springing region upper limb increasing section region is to use the more effective adjustment structure of triangle
Internal force, specifically pour size and be subject to and calculate.The increase of arch springing area of section increases the dead weight of arch springing part, plays
The effect of " pressure arch ", reduces vault sagging moment.
(4) in the reinforcing bar 31 in arch springing region lower edge surface soldered arch springing region, steel bar arrangement completes after-pouring coagulation
Soil is poured using cast-in-place mode, needs the perishable structure of easily getting rusty of fully wrapped around firmly arch springing region lower edge reinforcing bar etc.；
Arch springing region lower edge reinforcing bar, the measure can increase depth of section and area built in the lower edge of arch springing region, greatly
Enhance the drag of arch springing, the increase of arch springing area of section increases the dead weight of arch springing part, plays the role of " pressure arch ", adjusts
Structural internal force has been saved, vault sagging moment is reduced.
Preferably, the Arch Bridges Strengthening method of lift structure drag further includes step (5), and in crown area, lower edge, which is laid with, reinforces
Layer 5.It is handled using reinforcing layer, increases the bending resistance in arch ring section, the ability of drawing.
Preferably, be laid in step (5) reinforcing layer be using high performance carbon cloth auxiliary resin impregnate gluing knot in
The surface of crown area lower edge concrete component.High performance carbon cloth auxiliary resin impregnates gluing knot in crown area lower edge
The surface of concrete component reaches the mesh of enhancing component load-bearing ability and intensity using the good tensile strength of carbon fibre material
's；Not only can achieve the effect that improve structure tensile strength, but due to the characteristic of material itself makes increased dead load can be with
It ignores.
Preferably, it is the surface that steel plate is bonded in crown area lower edge concrete component reinforcing layer to be laid in step (5).
The higher material of adhesive tensile resistance intensity may be used and carry out consolidation process, can both achieve the effect that improve structure tensile strength,
Again since the characteristic of material itself makes increased dead load can be ignored.Steel plate then has good grinding performance, good
Heat treatment dimensional stability well, good toughness, good red hardness, good wearability.
Application example：
1, water river in Shangdong Province bridge overview
By taking the bridge of water river in Shangdong Province as an example, water river in Shangdong Province bridge is located in the 207 national highway Cenxi City towns Shui Wen the present invention, by Zhuang nationality in Guangxi autonomy
Forestry survey and design team of forestry bureau of area designs, and is built in 1977.Bridge is 2 across 60 meters of clear span, 7.5 meters of net rise, arch axis coefficient m
=3.5 constant section catenary open web type double curvature arch.Arch ring is 5 rib, 4 wave, and abutment is gravity type platform, and bridge pier is well foundation weight
Power formula pier (such as Fig. 5).Bridge is 7.8 meters wide, and bridge floor is net -7 meter+2 × 0.25 meter safety belt, and design load vapour -15 drag -80.This
Bridge does not have as-built drawing, is described according to design data, once 6 meters of drill rods is used to carry out geologic reconnaissance to bridge location when design, confirms riverbed
It is black sand rock at 4.5~5 meters lower, therefore, bridge pier, platform are using black sand rock as supporting course.Due to Nan Du to water river in Shangdong Province Class II highway
Construction, the design load of this bridge cannot meet the requirement of existing highway class of loading, thus need to add old bridge
Gu, put forward load, make bridge reach Class II highway vapour -20, hang -100 class of loading requirement.
2, arch is surveyed
Reflectorless total station is obtained in bridge upstream and downstream both sides actual measurement arch rib lower edge edge line coordinates using guest.Survey main arch
Clear span is 60.16 meters, 7.49 meters of net rise.By the arch feather edge line coordinates of actual measurement, 24 deciles are carried out, are listed at each bisector
Clear height value, as shown in table 1 below.
Table 1：Rise table (unit is divided at water river in Shangdong Province bank arch bottom 24 etc.：Rice)
It can be seen from the data in Table 1 that arch is bigger across place and former design deviation 1/4, up to 16.8 centimetres；Actual measurement
Bridge clear span is 60.16 meters 0.16 meter 60.0 meters bigger than design clear span.
3, each construction stage main arch ring section resistance checking computation results
Specific implementation process implementation steps are carried out by the above process, and each construction stage main arch ring section resistance checking computation results are shown in
The following table 2.
Table 2：Each construction stage main arch ring section resistance checking table
Note：Table middle section checking computations internal force considers safety coefficient when construction
As shown in table 2, by replacing vault filler and increasing this two reinforcement measures of arch springing section, main arch ring after reinforcing
Dead load thrust line is overlapped with arch before degree is substantially better than reinforcing.Due to being influenced by main arch ring ratio of rise to span, dead load pressure
Although line does not reach the requirement of conventional design " coincidence " at 5 points, reached " 3 points of coincidences " (vault, 1/4 across, 3/4 across)
Design effect, change main arch ring stress form, the bearing capacity to further increase bridge is laid a good foundation.Water river in Shangdong Province bridge
The method that main arch structure provides through the invention effectively improves the mechanical characteristic of bridge, improves the bearing capacity of old bridge,
The service life for extending old bridge obtains preferable economic results in society.
The description of the aforementioned specific exemplary embodiment to the present invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining the specific principle of the present invention and its actually answering
With so that those skilled in the art can realize and utilize the present invention a variety of different exemplary implementation schemes and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (8)
1. a kind of arch bridge reinforcing structure of lift structure drag, which is characterized in that including：
Crown area ruggedized construction comprising reinforcing bar, concrete layer and lightweight concrete layer, the reinforcing bar are layed in
Crown area, the concrete layer are laid on crown area surface, and the lightweight concrete layer is laid on the concrete layer；
Arch springing region upper limb ruggedized construction comprising reinforcing bar and concrete layer, the reinforcing bar are layed in arch springing region
Upper edge surfaces, using triangle gradual change type, the concrete layer is laid on arch springing region upper edge surfaces；And
Arch springing region lower edge ruggedized construction comprising reinforcing bar and concrete layer, the reinforcing bar are layed in arch springing region
Lower edge surface, the concrete layer is laid on arch springing region lower edge surface.
2. the arch bridge reinforcing structure of lift structure drag according to claim 1, which is characterized in that further include reinforcing layer,
It is laid on crown area lower edge surface.
3. a kind of Arch Bridges Strengthening method of lift structure drag, which is characterized in that include the following steps：
(1) reinforcing bar of crown area is welded in vault upper edge surfaces, steel bar arrangement pours coagulation in crown area after the completion
Then soil uses lightweight concrete replacement is original to banket, then carries out deck paving work；
(2) detection calculated bending moment zero line of demarcation, which is the line of demarcation of crown area and arch springing region；
(3) in the reinforcing bar in arch springing region upper edge surfaces welding arch springing region, the thickness of the reinforcing bar uses triangle gradually
Variant, arch springing region upper limb increasing section region is carried out after the completion of steel bar arrangement pours work；
(4) casting concrete, coagulation after the completion of the reinforcing bar in arch springing region lower edge surface soldered arch springing region, steel bar arrangement
Soil needs fully wrapped around reinforcing bar.
4. the Arch Bridges Strengthening method of lift structure drag according to claim 3, which is characterized in that further include step (5),
In crown area, lower edge is laid with reinforcing layer.
5. Arch Bridges Strengthening method according to claim 4, which is characterized in that it is using high to be laid with reinforcing layer in step (5)
The carbon cloth auxiliary resin of performance impregnates gluing knot in the surface of crown area lower edge concrete component.
6. the Arch Bridges Strengthening method of lift structure drag according to claim 4, which is characterized in that be laid in step (5)
Reinforcing layer is the surface that steel plate is bonded in crown area lower edge concrete component.
7. the Arch Bridges Strengthening method of lift structure drag according to claim 3, which is characterized in that step pours in (1)
The thickness of concrete layer is 8-15cm.
8. Arch Bridges Strengthening method according to claim 3, which is characterized in that upper and lower in bridge before carrying out step (1)
It swims both sides actual measurement arch rib lower edge edge line coordinates and decile is carried out according to the arch feather edge line coordinates of actual measurement.
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| CN111563341A (en) * | 2020-04-30 | 2020-08-21 | 中铁二院工程集团有限责任公司 | Evaluation method for anchorage depth of embedded foundation of arch abutment of deck arch bridge |
| CN112176888A (en) * | 2020-09-24 | 2021-01-05 | 保利长大工程有限公司 | Reinforcing method for arch back enlarged section structure of old stone arch bridge |
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| CN110804959A (en) * | 2019-11-26 | 2020-02-18 | 山西省交通规划勘察设计院有限公司 | Beam-arch cooperative stone arch bridge reinforcing and load shedding method |
| CN110804959B (en) * | 2019-11-26 | 2021-01-26 | 山西省交通规划勘察设计院有限公司 | Beam-arch cooperative stone arch bridge reinforcing and load shedding method |
| CN111119079A (en) * | 2020-02-27 | 2020-05-08 | 重庆交通大学 | Reinforcing construction method of solid-belly masonry arch bridge |
| CN111563341A (en) * | 2020-04-30 | 2020-08-21 | 中铁二院工程集团有限责任公司 | Evaluation method for anchorage depth of embedded foundation of arch abutment of deck arch bridge |
| CN111563341B (en) * | 2020-04-30 | 2022-03-25 | 中铁二院工程集团有限责任公司 | Evaluation method for anchorage depth of embedded foundation of arch abutment of deck arch bridge |
| CN112176888A (en) * | 2020-09-24 | 2021-01-05 | 保利长大工程有限公司 | Reinforcing method for arch back enlarged section structure of old stone arch bridge |
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