CN109537472A - A kind of prefabricated beam end bed die turning hinge device and its application method - Google Patents
A kind of prefabricated beam end bed die turning hinge device and its application method Download PDFInfo
- Publication number
- CN109537472A CN109537472A CN201910042912.8A CN201910042912A CN109537472A CN 109537472 A CN109537472 A CN 109537472A CN 201910042912 A CN201910042912 A CN 201910042912A CN 109537472 A CN109537472 A CN 109537472A
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- China
- Prior art keywords
- turning hinge
- template
- support base
- bed die
- mounting groove
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
The present invention provides a kind of prefabricated beam end bed die turning hinge device and its application method, equipment includes pedestal, shaft, turning hinge template and support base, is provided with mounting groove at left and right sides of pedestal.Support base is placed in mounting groove, and support base includes bottom plate, and the both ends of bottom plate are provided with the support arm of triangle, and two support arms are symmetrical arranged, and connecting hole is provided on support arm.Turning hinge template includes plate face, and the bottom center of plate face is provided with through hole.Turning hinge template can be connected between two support arms, and the shaft passes through connecting hole and through hole to which plate face to be rotatably connected on support arm.When use, the self weight of the end for concentrating on beam generated after by prestressed stretch-draw due to beam can be converted, it avoids the plain concrete shearing force of the end of beam excessive and damages, it ensure that the stress equalization of beam end concrete, improve the construction quality of entire beam, the configuration of the present invention is simple, easy for construction, significant effect.
Description
Technical field
The present invention relates to the prestressed stretch-draw fields of beam, and in particular to a kind of prefabricated beam end bed die turning hinge device and its makes
Use method.
Background technique
Superstructure is increasingly becoming the main method that highway bridge guarantees quality, accelerates progress using precast assembly, especially
When being that beam slab quantity is larger, batch production is prefabricated to have very big technical advantage and cost advantage.T beam and small box girder are Middle Or Small Spans
The principal mode of diameter bridge, T beam are chiefly used in 30~50m across footpath, and small box girder is chiefly used in 20~40m across footpath.It needs to process in Liang Chang
Several beam making bench, the fixed form on pedestal, the concrete of casting beams reach to concrete crushing strength and elasticity modulus and set
When meter requires, then implement prestressed stretch-draw, then carries out hole path pressure grouting, after slurry reaches the intensity of design requirement, then will be pre-
Beam processed is placed in beam strorage area or transports to scene and installed.As shown in Figure 1, end template 2 is fixed on pedestal 1, in prestressed stretch-draw
In the process, the span centre 3 of beam arches upward upwards first is detached from end template 2, and then the part far from span centre is successively detached from end template, to most
Only it is left the end 4 of beam afterwards in the self weight for supporting entire beam.The end of beam is the plain concrete of not arrangement of reinforcement, is constantly arched upward in beam
During, the area of the end supporting beam body weight of beam is constantly reduced, and the self weight of the most back rest is wholly converted into end element coagulation
The shear load of soil, when the shear stress of generation reaches coagulation soil classifiction, it is broken that shearing will occur for this part plain concrete
Bad, crack is upwardly extended from bottom, and fracture width reaches several centimeters sometimes, and length is up to tens centimetres, and cant beam is especially prominent, seriously
When anchorage can be directly exposed in environment.The so big shearing crack in the end of beam is not easily repaired, and many precast beams are with these
Crack has been mounted on bridge, uses less than the more than ten years sometimes, and anchorage will occur significantly to corrode, and presstressed reinforcing steel once loses
The fixed function of anchorage will bounce back, and prestressing force relaxes therewith, and the bearing capacity of prestressed girder will significantly reduce,
The structure of bridge will have a greatly reduced quality safely.In order to avoid the generation of such thing, needs to be adjusted end end template, make it
In the middle part of beam during arch camber, a degree of rotation can occur with beam-ends, make the self weight of beam by prestress steel after anchorage
Reinforced concrete undertakes.
Summary of the invention
The first object of the present invention solves prefabricated beam end at present there is provided a kind of prefabricated beam end bed die turning hinge device
Due to excessive with the shear stress of the template contacts of pedestal after prestressed stretch-draw the technical problem of failure by shear occurs for concrete.
The following technical solution is employed by the present invention:
A kind of prefabricated beam end bed die turning hinge device, including pedestal, shaft, turning hinge template and support base, the left and right of pedestal
Two sides are provided with mounting groove；
The support base is placed in mounting groove, and support base includes bottom plate, and the both ends of bottom plate are provided with the branch of triangle
Brace, two support arms are symmetrical arranged, and connecting hole is provided on support arm；
The turning hinge template includes plate face, and the bottom center of plate face is provided with through hole；
Turning hinge template can be connected between two support arms, and the shaft passes through connecting hole and through hole to turn plate face
It is dynamic to be connected on support arm.
Preferably, it is provided with boss between described two mounting grooves, end template is provided on boss；It is installed on support base
Turning hinge template and after being placed in mounting groove, the upper surface of plate face is flushed with the upper surface of end template.
Preferably, the top of support arm is arranged in the connecting hole.
Preferably, the bottom plate is adapted with mounting groove.
There is provided a kind of above-described users of prefabricated beam end bed die turning hinge device for the second object of the present invention
Method.
A kind of application method of prefabricated beam end bed die turning hinge device, comprising the following steps:
Step 1: support base is placed in the mounting groove of pedestal and is firmly installed, shaft pass through connecting hole and through hole from
And turning hinge template is rotatably connected with support base；
Step 2: using concreting beam on pedestal, reach design requirement to concrete crushing strength and elasticity modulus
Afterwards, be ready for prestressed stretch-draw, beam before prestressed stretch-draw, turning hinge template beam pressure effect under can with end template at
In the state of approximately the same plane, the self weight of common supporting beam；
Step 3: when beam is by prestressed stretch-draw, after the middle part arch camber of beam, turning hinge template can be small-scale on support base
It rotates to adapt to the variation of the end of the arch camber back rest, so that the gravity of beam itself is undertaken by the prestressed reinforced concrete of beam.
The invention has the advantages that:
Prefabricated beam end bed die turning hinge device provided by the invention, structure is simple, easy for construction, significant effect, Ke Yizhuan
The self weight for changing the end for concentrating on beam generated after by prestressed stretch-draw due to beam avoids the plain concrete shearing force of the end of beam
It is excessive and damage, it ensure that the stress equalization of beam end concrete, improve the construction quality of entire beam, turning hinge mould of the invention
Plate stability is good, and using reliable, the angle of turning hinge template can freely change to adapt to the load-bearing of the beam of different conditions.
Detailed description of the invention
Fig. 1 is the structure chart of existing equipment.
Fig. 2 is the structure chart of prefabricated beam end bed die turning hinge device of the invention.
Fig. 3 is the structural schematic diagram of pedestal.
Fig. 4 is the structural schematic diagram of support base.
Fig. 5 is the structural schematic diagram of turning hinge template.
Specific embodiment
A specific embodiment of the invention is described further in the following with reference to the drawings and specific embodiments:
Embodiment 1
In conjunction with Fig. 2 to Fig. 5, a kind of prefabricated beam end bed die turning hinge device, including pedestal 5, shaft, turning hinge template 6 and branch
Seat 7 is supportted, the left and right sides of pedestal 5 is provided with mounting groove 8.
It is provided with boss 9 between two mounting grooves, end template 10 is provided on boss.
Support base 7 is placed in mounting groove, and support base includes bottom plate 11, and bottom plate is adapted with mounting groove.
The both ends of bottom plate are provided with the support arm 12 of triangle, and two support arms are symmetrical arranged, are provided on support arm
Connecting hole 13.Specifically, the top of support arm is arranged in connecting hole.
Turning hinge template includes plate face 14, and the bottom center of plate face is provided with through hole 15.
Turning hinge template can be connected between two support arms, and shaft passes through connecting hole 13 and through hole 15 thus by plate face 14
It is rotatably connected on support arm 12.
After installing turning hinge template on support base and being placed in mounting groove, the upper surface of plate face and the upper surface of end template are neat
It is flat.
Embodiment 2
A kind of application method of prefabricated beam end bed die turning hinge device described in above embodiments, comprising the following steps:
Step 1: support base is placed in the mounting groove of pedestal and is firmly installed, shaft pass through connecting hole and through hole from
And turning hinge template is rotatably connected with support base；
Step 2: using concreting beam on pedestal, reach design requirement to concrete crushing strength and elasticity modulus
Afterwards, be ready for prestressed stretch-draw, beam before prestressed stretch-draw, turning hinge template beam pressure effect under can with end template at
In the state of approximately the same plane, the self weight of common supporting beam；
Step 3: when beam is by prestressed stretch-draw, after 16 arch camber of middle part of beam, turning hinge template can on support base small range
Rotation to adapt to the variation of the end 17 of the arch camber back rest so that the gravity of beam itself is held by the prestressed reinforced concrete of beam
Load.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the essential scope of the present invention also should belong to of the invention
Protection scope.
Claims (5)
1. a kind of prefabricated beam end bed die turning hinge device, which is characterized in that including pedestal, shaft, turning hinge template and support base, platform
The left and right sides of seat is provided with mounting groove；
The support base is placed in mounting groove, and support base includes bottom plate, and the both ends of bottom plate are provided with the support arm of triangle,
Two support arms are symmetrical arranged, and connecting hole is provided on support arm；
The turning hinge template includes plate face, and the bottom center of plate face is provided with through hole；
Turning hinge template can be connected between two support arms, and the shaft passes through connecting hole and through hole and connects to rotate plate face
It connects on support arm.
2. a kind of prefabricated beam end bed die turning hinge device according to claim 1, which is characterized in that described two mounting grooves it
Between be provided with boss, end template is provided on boss；After turning hinge template is installed on support base and is placed in mounting groove, plate face
Upper surface flushed with the upper surface of end template.
3. a kind of prefabricated beam end bed die turning hinge device according to claim 1, which is characterized in that the connecting hole setting exists
The top of support arm.
4. a kind of prefabricated beam end bed die turning hinge device according to claim 1, which is characterized in that the bottom plate and mounting groove
It is adapted.
5. according to claim 1 to a kind of application method of prefabricated beam end bed die turning hinge device described in 4, which is characterized in that
The following steps are included:
Step 1: support base being placed in the mounting groove of pedestal and firmly installed, shaft passes through connecting hole and through hole thus will
Turning hinge template is rotatably connected with support base；
Step 2: concreting beam is used on pedestal, it is quasi- after concrete crushing strength and elasticity modulus reach design requirement
Standby to carry out prestressed stretch-draw, for beam before prestressed stretch-draw, turning hinge template can be in same with end template under the pressure effect of beam
The state of one plane, the self weight of common supporting beam；
Step 3: when beam is by prestressed stretch-draw, after the middle part arch camber of beam, turning hinge template can the small-scale rotation on support base
To adapt to the variation of the end of the arch camber back rest, so that the gravity of beam itself is undertaken by the prestressed reinforced concrete of beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910042912.8A CN109537472B (en) | 2019-01-17 | 2019-01-17 | Precast beam end bottom die rotating hinge device and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910042912.8A CN109537472B (en) | 2019-01-17 | 2019-01-17 | Precast beam end bottom die rotating hinge device and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109537472A true CN109537472A (en) | 2019-03-29 |
| CN109537472B CN109537472B (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910042912.8A Active CN109537472B (en) | 2019-01-17 | 2019-01-17 | Precast beam end bottom die rotating hinge device and application method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109972525A (en) * | 2019-04-22 | 2019-07-05 | 中建三局基础设施建设投资有限公司 | A device and construction method for preventing prefabricated T-beam ends from cracking after being stretched |
| CN110843124A (en) * | 2019-11-07 | 2020-02-28 | 广东冠粤路桥有限公司 | Pedestal suitable for post-tensioning-method prefabricated box girder and box girder preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109972525A (en) * | 2019-04-22 | 2019-07-05 | 中建三局基础设施建设投资有限公司 | A device and construction method for preventing prefabricated T-beam ends from cracking after being stretched |
| CN110843124A (en) * | 2019-11-07 | 2020-02-28 | 广东冠粤路桥有限公司 | Pedestal suitable for post-tensioning-method prefabricated box girder and box girder preparation method |
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| Publication number | Publication date |
|---|---|
| CN109537472B (en) | 2023-08-15 |
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