CN208346658U - A kind of old hollow slab bridge construction of hinge seam longitudinal prestressing reinforcing single hole - Google Patents
A kind of old hollow slab bridge construction of hinge seam longitudinal prestressing reinforcing single hole Download PDFInfo
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- CN208346658U CN208346658U CN201820695758.5U CN201820695758U CN208346658U CN 208346658 U CN208346658 U CN 208346658U CN 201820695758 U CN201820695758 U CN 201820695758U CN 208346658 U CN208346658 U CN 208346658U
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Abstract
The utility model discloses a kind of old hollow slab bridge construction of hinge seam longitudinal prestressing reinforcing single hole, including old hollow slab girder, hinge seam distributing bar, prestress pipe, longitudinal prestressing steel beam, anchorage, concrete slab.Old hollow slab girder is the complete old cored slab single-beam with ribbet (hinge seam)；Hinge seam distributing bar is arranged in the seam of the hinge between two hollow slab girders；Prestress pipe is embedded in the seam of the hinge between two beams, and longitudinal straight line runs through entire old hollow slab girder；Longitudinal prestressing steel beam passes through prestress pipe, beam-ends is anchored in by anchorage after the tensioning of both ends, to provide reinforcing longitudinal prestressing；Concrete slab is located at hollow slab girder top surface, using with the identical concrete of hinge seam concrete, and pour, multi-disc Hollow Slab Beam Bridge connected with concrete slab by hinge seam integral simultaneously with hinge seam.
Description
Technical field
The utility model belongs to the reinforcement technique field more particularly to a kind of hinge seam longitudinal direction of assembled freely-supported Hollow Slab Beam Bridge
The old hollow slab bridge construction of prestressed reinforcement single hole.
Background technique
As national economy comparatively fast develops, the fast development of highway in China transport development cause is promoted, bridge is also promoted
The construction and development of beam engineering.In built bridge, Short/Medium Span Bridge occupies very big specific gravity, these bridges all use substantially
Armored concrete, prestress concrete girder slab formula structure.Since early stage is limited by material, design, construction level, in addition material from
Overload and oversize caused by right aging, loads change and the factors such as bridge maintaining maintenance missing are built up, leads to many bridge structures
It is not able to satisfy the requirement of normal use or bearing capacity.Therefore, in Existing Highway Bridges Reconstruction Project, a large amount of old bridge can be removed
Beam slab, wherein the old bridge plate majority active time removed did not reached its projected life far at 20 years or so.If will remove
Beam slab it is discarded, not only will increase the project cost of newly building bridge, but also environmental disruption can be caused due to the exploitation of construction material；
Discarded beam slab also will cause secondary environmental pollution as treating construction waste simultaneously.It is special for old bridge plate structure and stress
Point is improved its service performance for having bridge, can further be extended old beam slab and use the longevity by the reinforcement measure of simple economy
Life, is the inevitable requirement of science of bridge building field Green Sustainable.
Assembled freely-supported Hollow Slab Beam Bridge has many advantages, such as that prefabricated simple, easy for installation, low cost, building height are small,
It is widely applied in highway Short/Medium Span Bridge engineering, is one of the bridge type that quantity is most in China's servicing bridges.It is currently used
Old Hollow Slab Beam Bridge reinforcement means is many, as bridge floor thickens method for strengthening, strengthening with external bonding method, external prestressed strengthening method, change knot
Structure system method for strengthening etc., but there is limitation, such as: Enlargement of Section will increase dead load, reduce head room；It pastes
There is reinforcement material and substrate bond effect and durability in steel plate and fibrous composite；External prestressing and change
There are the problems such as reinforcement process complexity for system method for strengthening.
So in this background, develops a kind of hinge seam longitudinal prestressing and reinforce the old hollow slab bridge construction of single hole and construction party
Method has great practical value.
Utility model content
The purpose of this utility model is to solve the deficiency in above-mentioned existing in-service Hollow Slab Beam Bridge reinforcement technique, existing
Technology under the premise of, provide it is a kind of by hinge seam apply longitudinal prestressing reinforce old assembled freely-supported single hole hollow slab bridge construction and
Construction method.
To achieve the goals above, the utility model uses following technical measures:
A kind of hinge seam longitudinal prestressing reinforces the old hollow slab bridge construction of single hole, including old hollow slab girder, hinge seam distributing bar,
Prestress pipe, longitudinal prestressing steel beam, anchorage, concrete slab；The old hollow slab girder is with hinged seam (tongue and groove
Seam) complete old cored slab single plate beam comprising at least two；The hinge seam distributing bar is arranged in two adjacent vacant cores
In hinge seam between beam；The prestress pipe is also embedded in the hinge seam, and prestress pipe longitudinal direction straight line is through whole
Geju City hollow slab girder；The prestressed strand passes through prestress pipe, hinge seam both ends is anchored in by anchorage after tensioning, to mention
For reinforcing prestressing force；Concrete is poured in the hinge seam, the concrete slab is located at hollow slab girder top surface.
Further, the concrete slab uses label high-strength concrete identical as hinge seam concrete, and stitches with hinge
It pours simultaneously.
Further, the old hollow slab girder is no significant defect, but bearing capacity is unsatisfactory for existing load requirement
Old assembled hollow slab girder.
Further, the old hollow slab girder is divided into two side hollow slab girders and multiple middle hollow slab girders, side cored slab
Beam and middle hollow slab girder pour connection by high-strength concrete hinge seam and concrete slab not less than main beam concrete label
Form Hollow Slab Beam Bridge entirety superstructure.
Further, hinge seam distributing bar is divided into lateral cross reinforcing bar and longitudinal reinforcement, and it acts as reinforce cutting with scissors
It stitches tension, shear resistance, improve overall stiffness；Lateral cross reinforcing bar crossover location is located at hinge seam section central upper, laterally hands over
Fork arrangement can enhance concrete hinge and stitch lateral tensile capacity；Longitudinal reinforcement is arranged in hinge seam lower part.
Further, the longitudinal reinforcement is multiple including can be set, and multiple longitudinal reinforcements are parallel to each other.
Further, the lateral cross reinforcing bar is also provided with multiple, is arranged successively along the longitudinal direction of hinge seam.
Further, the inside of lateral cross reinforcing bar is arranged in the longitudinal reinforcement, connect longitudinally disposed one arrange to
Cross wise reinforcement.
Further, the prestress pipe is located at middle and lower part in hinge seam, to improve prestressing force effect efficiency.
Further, the longitudinal prestressing steel beam has poured in hinge seam and bridge deck concrete and has reached design strength
Afterwards, it carries out longitudinal lashing and both ends stretch-draw anchor, forms entirety with entire Hollow Slab Beam Bridge structure after pumping of prostressed duct, mention
For longitudinal prestressing.
The old hollow slab bridge construction method of single hole, including following step are reinforced to the hinge seam longitudinal prestressing
It is rapid:
Step 1: multiple old hollow slab girders are placed side by side on the abutment of both ends；Hinge is formd between adjacent old hollow slab girder
Seam.
Step 2: binding lateral cross reinforcing bar and longitudinal reinforcement in hinge is stitched.
Step 3: prestress pipe straight line being placed on hinge seam central bottom distributing bar, pressure is reserved in prestress pipe
Slurry pipe.
Step 4: bottom seam being filled out using mortar first, then pours hinge seam concrete and floorings coagulation between hollow slab girder
Soil, hinge seam both ends prestress pipe nearby reserve sealing off and covering anchorage slot.
Step 5: longitudinal prestressing steel beam passes through prestress pipe, and after cutting with scissors seam concrete and reaching design strength, both ends are same
Shi Zhangla longitudinal prestressing steel beam is anchored in sealing off and covering anchorage slot by anchorage to design value.
Step 6: cutting the longitudinal prestressing steel beam for exposing to anchorage, and using high strength cement mortar in sealing off and covering anchorage slot
Anchorage carries out sealing off and covering anchorage processing, anchorage is wrapped in high-strength cement mortar, after cement mortar reaches some strength, to prestressing force
Pipeline carries out mud jacking filling, completes entire old single hole Hollow Slab Beam Bridge strengthening construction.
The utility model has the advantage that compared with the existing technology
(1) deficiency for overcoming the old Hollow Slab Beam Bridge reinforcing construction of tradition, with old Hollow Slab Beam Bridge increasing section method for strengthening
It compares, the utility model does not have to change dead load and head room substantially；Compared with external prestressing and strengthening with external bonding method, this
Utility model ensure that the durability and integral working of reinforcement material.
(2) rationally, longitudinal prestressing can largely improve integrally-built bearing capacity to the utility model construction；Hinge
Seam uses high-strength concrete one-piece casting with floorings, can utmostly guarantee that prestressed transmitting and the old hollow slab girder of multi-disc are whole
Body rigidity.
(3) the utility model material utilization amount is few, and construction method is simple, has given full play to the recycling function of old hollow slab girder
Can, the old Hollow Slab Beam Bridge bearing capacity of single hole is improved, is reduced environmental pollution, energy consumption is reduced, saves social resources, social benefit
It is very significant with economic benefit.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is this
Some embodiments of utility model, for those of ordinary skill in the art, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is old 1/2 elevation of Hollow Slab Beam Bridge reinforcing construction；
Fig. 2 is old Hollow Slab Beam Bridge reinforcing construction cross-sectional view；
Fig. 3 is hinge seam distributing bar and longitudinal prestressing Strands Layout figure.
In figure: the old hollow slab girder of 1-, 2- hinge seam, 3- hinge seam distributing bar, 4- prestress pipe, 5- longitudinal prestressing steel
Beam, 6- anchorage, 7- concrete slab, the side 8- hollow slab girder, hollow slab girder in 9-, 10- lateral cross reinforcing bar, the longitudinal direction 11- steel
Muscle, 12- sealing off and covering anchorage slot, the bottom 13- seam, 14- guardrail.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Name Resolution: " high-strength concrete " described in the utility model refer to strength grade be C60 and its more than it is mixed
Solidifying soil.
Hinge seam described in the utility model is exactly ribbet described in this field.
As background technique is introduced, there are the following problems in existing old Hollow Slab Beam Bridge reinforcement technique: (1) increasing and cut
Face method will increase dead load, reduce head room；(2) there is reinforcement material and substrate in affixing steel plate and fibrous composite
The problem of bond effect and durability；(3) external prestressing and change system method for strengthening and ask there are reinforcement process complexity etc. is many
Topic.In order to solve technical problem as above, present applicant proposes a kind of hinge seam longitudinal prestressings to reinforce old Hollow Slab Beam Bridge construction
And construction method.
Below in conjunction with attached drawing 1,2,3, the structure of the utility model is further described.
The utility model provides one kind relative to old assembled Hollow Slab Beam Bridge reinforcement technique, has and can satisfy old sky
The recycling function of core beam, improves old Hollow Slab Beam Bridge bearing capacity, and new hinge seam longitudinal prestressing reinforces the old sky of single hole
Core bridge construction and construction method.
In conjunction with shown in FIG. 1 to FIG. 3, it includes old cored slab that a kind of old hollow slab bridge of hinge seam longitudinal prestressing reinforcing single hole, which constructs,
Beam 1, hinge seam distributing bar 3, prestress pipe 4, longitudinal prestressing steel beam 5, anchorage 6, concrete slab 7.Old hollow slab girder 1
For the complete old cored slab single-beam with ribbet (hinge seam 2) comprising at least two, multiple old hollow slab girders 1 are arranged in parallel；
The hinge seam distributing bar 3 is regular reinforcement, is arranged in the hinge seam 2 between two hollow slab girders, i.e., per adjacent two
A real abdomen Bars In Poured Concrete Slab 2 is just provided in hinge seam between old hollow slab girder.
The prestress pipe 4 is embedded in the seam of the hinge between two beams 2, and longitudinal straight line runs through entire old cored slab 1；
The longitudinal prestressing steel beam 5 passes through prestress pipe 4, is anchored in beam-ends by anchorage 6 after tensioning, is answered in advance with providing to reinforce
Power；Concrete is poured inside hinge seam 2, the concrete slab 7 is located at hollow slab girder top surface, stitches coagulation using with hinge
The identical label high-strength concrete of soil, and poured simultaneously with hinge seam 2.
As shown in connection with fig. 1, old hollow slab girder 1 is no significant defect, but bearing capacity is unsatisfactory for the old of existing load requirement
Assembled hollow slab girder.
As shown in connection with fig. 2, old hollow slab girder 1 is divided to for two side hollow slab girders 8 and multiple middle hollow slab girders 9, side cored slab
Beam 8 and middle hollow slab girder 9 pour connection and form Hollow Slab Beam Bridge entirety by high-strength concrete hinge seam 2 and concrete slab 7
Superstructure.
In conjunction with shown in Fig. 2, Fig. 3, hinge seam distributing bar 3 divides for lateral cross reinforcing bar 10 and longitudinal reinforcement 11, it acts as
Reinforce 2 tensions of hinge seam, shear resistance, improve overall stiffness；10 crossover location of lateral cross reinforcing bar is located on 2 section centers of hinge seam
Portion, lateral cross arrangement can enhance concrete hinge and stitch lateral tensile capacity；Longitudinal reinforcement 11 is arranged in 2 middle and lower parts of hinge seam.
Preferably, the longitudinal reinforcement is multiple including can be set, and multiple longitudinal reinforcements are parallel to each other.
Preferably, the lateral cross reinforcing bar is also provided with multiple, is arranged successively along the longitudinal direction of hinge seam.
Preferably, the inside of lateral cross reinforcing bar is arranged in the longitudinal reinforcement, and lateral cross reinforcing bar is arranged in
Lower part connects longitudinally disposed one and arranges to cross wise reinforcement.
The setting direction of above-mentioned longitudinal reinforcement refers to the direction consistent with old 1 longitudinal direction of hollow slab girder.
As shown in connection with fig. 3, the prestress pipe 4 is located at middle and lower part in hinge seam 2, in favor of the positioning of prestress pipe 4
And improve prestressing force effect efficiency.
Preferably, prestress pipe 4 is arranged between longitudinal reinforcement.
In conjunction with shown in FIG. 1 to FIG. 3, longitudinal prestressing steel beam 5 has poured and has reached and set in hinge seam 2 and concrete slab 7
After counting intensity, the longitudinal lashing of progress and both ends stretch-draw anchor, and 2 both ends of hinge seam are anchored at, after pumping of prostressed duct and entirely
Hollow Slab Beam Bridge structure forms entirety, provides longitudinal prestressing.
Old Hollow Slab Beam Bridge construction method is reinforced to the hinge seam longitudinal prestressing, including the following steps:
Step 1: old side hollow slab girder 8 and multiple middle hollow slab girders 9 is placed side by side on the abutment of both ends, and the side Jiu Qiao is hollow
Hinge seam 2 is formd between plate-girder and middle hollow slab girder 9 and adjacent middle hollow slab girder 9；Hollow slab girder 8 He in side described here
Middle hollow slab girder 9 belongs to old hollow slab girder；
Step 2: binding lateral cross reinforcing bar 10 and longitudinal reinforcement 11 in hinge seam 2；
Step 3: 4 straight line of prestress pipe is placed on hinge seam central bottom distributing bar 3, it is pre- in prestress pipe 4
Stay madjack pipe.
Step 4: bottom seam 13 being filled out using M15 mortar first, then pours hinge seam concrete and bridge floor between hollow slab girder
Board concrete, 2 both ends prestress pipe 4 of hinge seam nearby reserve sealing off and covering anchorage slot 12.
Step 5: longitudinal prestressing steel beam passes through prestress pipe 4, and after cutting with scissors seam concrete and reaching design strength, both ends are same
Shi Zhangla longitudinal prestressing steel beam 5 is anchored in sealing off and covering anchorage slot 12 to design value, and by anchorage 6.
Step 6: cutting the longitudinal prestressing steel bunch 5 for exposing to anchorage, and using high strength cement mortar to sealing off and covering anchorage slot
Anchorage 6 in 12 carries out sealing off and covering anchorage processing, and anchorage 6 is wrapped in high-strength cement mortar, after cement mortar reaches some strength,
Mud jacking filling is carried out to prestress pipe 4, completes entire old single hole Hollow Slab Beam Bridge strengthening construction.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but it is not practical new to this
The limitation of type protection scope, those skilled in the art should understand that, based on the technical solution of the present invention, ability
Field technique personnel do not need to make the creative labor the various modifications or changes that can be made still in the protection model of the utility model
Within enclosing.
Claims (9)
1. a kind of hinge seam longitudinal prestressing reinforces the old hollow slab bridge construction of single hole, which is characterized in that including old hollow slab girder, hinge seam
Distributing bar, prestress pipe, longitudinal prestressing steel beam, anchorage, concrete slab；The old hollow slab girder is with hinged
The complete old cored slab single plate beam of seam comprising at least two；The hinge seam distributing bar is arranged in two adjacent vacant cores
In hinge seam between beam；In the prestress pipe embedded two hinge seams, prestress pipe longitudinal direction straight line is through entire
Old hollow slab girder；The prestressed strand passes through prestress pipe, hinge seam both ends is anchored in by anchorage after tensioning, to provide
Reinforce prestressing force；Concrete is poured in the hinge seam, the concrete slab is located at hollow slab girder top surface.
2. a kind of hinge seam longitudinal prestressing as described in claim 1 reinforces the old hollow slab bridge construction of single hole, which is characterized in that institute
The old hollow slab girder stated is divided into two side hollow slab girders and multiple middle hollow slab girders, and side hollow slab girder and middle hollow slab girder be not by
Lower than the hinge seam and bridge deck concrete of main beam concrete label, pours connection and form Hollow Slab Beam Bridge entirety superstructure.
3. a kind of hinge seam longitudinal prestressing as described in claim 1 reinforces the old hollow slab bridge construction of single hole, which is characterized in that institute
The hinge seam distributing bar stated is divided into lateral cross reinforcing bar and longitudinal reinforcement, and lateral cross reinforcing bar crossover location is located in hinge seam section
Portion in the heart, longitudinal reinforcement are arranged in hinge seam lower part.
4. a kind of hinge seam longitudinal prestressing as claimed in claim 3 reinforces the old hollow slab bridge construction of single hole, which is characterized in that institute
The longitudinal reinforcement stated is multiple including can be set, and multiple longitudinal reinforcements are parallel to each other.
5. a kind of hinge seam longitudinal prestressing as claimed in claim 3 reinforces the old hollow slab bridge construction of single hole, which is characterized in that institute
The lateral cross reinforcing bar stated be also provided with it is multiple, along hinge seam longitudinal direction be arranged successively.
6. a kind of hinge seam longitudinal prestressing as claimed in claim 3 reinforces the old hollow slab bridge construction of single hole, which is characterized in that institute
The inside of lateral cross reinforcing bar is arranged in the longitudinal reinforcement stated, and connects longitudinally disposed one and arranges to cross wise reinforcement.
7. a kind of hinge seam longitudinal prestressing as described in claim 1 reinforces the old hollow slab bridge construction of single hole, which is characterized in that institute
The prestress pipe stated is located at hinge and stitches interior middle and lower part.
8. a kind of hinge seam longitudinal prestressing as described in claim 1 reinforces the old hollow slab bridge construction of single hole, which is characterized in that institute
The longitudinal prestressing steel beam stated carries out longitudinal lashing and two after hinge seam and bridge deck concrete have poured and reached design strength
Stretch-draw anchor is held, entirety is formed with entire Hollow Slab Beam Bridge structure after pumping of prostressed duct, longitudinal prestressing is provided.
9. a kind of hinge seam longitudinal prestressing as described in claim 1 reinforces the old hollow slab bridge construction of single hole, which is characterized in that mixed
Solidifying soil floorings use concrete identical as hinge seam concrete, and pour simultaneously with hinge seam.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820695758.5U CN208346658U (en) | 2018-05-10 | 2018-05-10 | A kind of old hollow slab bridge construction of hinge seam longitudinal prestressing reinforcing single hole |
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| CN201820695758.5U CN208346658U (en) | 2018-05-10 | 2018-05-10 | A kind of old hollow slab bridge construction of hinge seam longitudinal prestressing reinforcing single hole |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306421A (en) * | 2019-06-05 | 2019-10-08 | 成都建工工业化建筑有限公司 | Assembled plate-girder and its construction method based on building industrialization product |
-
2018
- 2018-05-10 CN CN201820695758.5U patent/CN208346658U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306421A (en) * | 2019-06-05 | 2019-10-08 | 成都建工工业化建筑有限公司 | Assembled plate-girder and its construction method based on building industrialization product |
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