CN209868976U - Device for injecting retarder to enable fibers at joint of concrete structure to be continuous - Google Patents
Device for injecting retarder to enable fibers at joint of concrete structure to be continuous Download PDFInfo
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- CN209868976U CN209868976U CN201920218384.2U CN201920218384U CN209868976U CN 209868976 U CN209868976 U CN 209868976U CN 201920218384 U CN201920218384 U CN 201920218384U CN 209868976 U CN209868976 U CN 209868976U
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Abstract
The utility model relates to a civil engineering technical field especially relates to an pour into retarder messenger concrete structure seam crossing fibre continuation device, including being used for the seam template that is connected with concrete structure, be provided with the cavity that is used for loading the retarder in the seam template, the upper end of seam template is provided with and is linked together with the cavity and is used for the slip casting pipe that pours into the retarder into in the cavity into, and the interval is provided with the grout outlet of wearing out the cavity on the panel that the seam template is close to concrete structure one side. The device can keep the fiber continuity of the joints of the precast concrete structures or the cast-in-place concrete in the process of pouring in different times, so that the stress of the joints is reasonable.
Description
Technical Field
The utility model relates to a civil engineering technical field especially relates to an pour into retarder and make concrete structure seam crossing fibre continuous device into.
Background
It is difficult to avoid the existence of joints (including construction joints, boundary joints, etc.) for both prefabricated structures and split-cast structures, which involves the problem of new and old concrete interfacing. Especially for fibre-bearing concrete structures, the presence of the seam will result in a discontinuity in the fibres, making the seam a weak point for it. Common joints in engineering include flat joints, zigzag joints, stepped joints, tongue-and-groove joints, and the like. The flat joint has simple construction and wide application, but the crack resistance of the joint is insufficient and the joint is easy to damage; the contact area of a joint interface is increased on the basis of a flat joint by the sawtooth joint and the stepped joint, so that the anti-cracking strength of the joint is increased, but the reinforcing effect is not obvious enough and the construction formwork is complex; the tongue-and-groove joint enables the tensile stress part borne by the joint to be converted into shear stress through the interlocking effect of the tongue-and-groove structure on the basis of increasing the contact area of the joint, further improves the crack resistance strength of the joint, but also increases the construction difficulty and is difficult to ensure the quality of the joint.
Although the joint structure measures can partially improve the joint strength, the problem of weak stress at the joint cannot be fundamentally solved, particularly for concrete with fibers, the problem of joint crack resistance reduction caused by artificial 'cutting' of the fibers at the joint cannot be brought into play with the advantages of the structure and the material.
Disclosure of Invention
An object of the utility model is to provide an pour into retarder messenger concrete structure seam crossing fibre continuation device, the device can make precast concrete structure seam crossing or cast in situ concrete in the fractional pouring in-process seam crossing fibre keep continuous, make the seam atress reasonable.
The technical scheme of the utility model lies in: a device for injecting retarder to enable fibers at the joint of a concrete structure to be continuous comprises a joint template connected with the concrete structure, wherein a cavity used for filling the retarder is formed in the joint template, a grouting pipe communicated with the cavity and used for injecting the retarder into the cavity is arranged at the upper end of the joint template, and grout outlet holes penetrating out of the cavity are formed in the panel, close to one side of the concrete structure, of the joint template at intervals.
Further, be provided with horizontal baffle and/or vertical baffle between the two panels of seam template, be provided with the trompil that makes the mutual intercommunication of seam template inner chamber on horizontal baffle and the vertical baffle respectively, vertical interval arrangement is followed to the horizontal baffle, horizontal interval arrangement is followed to the vertical baffle.
Further, horizontal stiffening ribs and/or vertical stiffening ribs on the non-concrete side of the joint formwork are arranged at intervals in the vertical direction, and the vertical stiffening ribs are arranged at intervals in the transverse direction.
Further, the width of the concrete adjacent to the surface of the seaming formwork is 10mm ~ 25 mm.
Furthermore, the concrete at the joint of the concrete structure is formed by pouring fiber concrete or ultrahigh-performance concrete, and the concrete at the rest parts of the concrete structure is formed by pouring common concrete, fiber concrete, high-performance concrete or ultrahigh-performance concrete.
Furthermore, the concrete at the joint of the concrete structure is mixed with disorderly distributed fibers, and the fibers are in a flat shape, a spiral shape or a corrugated shape.
Further, the fiber content of the concrete structure joint is more than that of the concrete structure non-joint.
Further, the fiber length was 13mm ~ 50 mm.
Compared with the prior art, the utility model has the advantages of it is following: the problem that the stress of the concrete structure at the joint is weak is fundamentally solved, particularly the problem that the fibers of the concrete structure doped with the fibers at the joint are discontinuous is solved, the joint performance is not required to be improved by changing the shape of the joint, reinforcing bars or special-shaped steel plates and other complex joint forms, the fibers at the joint of the prefabricated concrete structure or the joint of cast-in-place concrete in the process of casting for multiple times are kept continuous, the stress of the joint is reasonable, and the anti-cracking strength is high. The method has the advantages of simple and convenient operation, low construction cost, convenient construction, excellent structural performance and good popularization prospect.
Drawings
FIG. 1 is a front view of the hollow form with holes of the present invention;
FIG. 2 is a side view of the hollow form with holes of the present invention;
FIG. 3 is a rear view of the hollow form with holes of the present invention;
fig. 4 is a cross-sectional view a-a of fig. 2 of the present invention;
in the figure: 1-a concrete structure; 11-retarder effect zone; 2-a retarder; 3-a seam template; 31-a cavity; 4-grouting pipe; 5-slurry outlet; 6-vertical stiffening ribs; 7-horizontal stiffeners; 8-vertical partition plates; 9-horizontal partition plate, 10-hole.
Detailed Description
In order to make the aforementioned features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.
Refer to fig. 1 to 4
A device for injecting retarder to enable fibers at the joint of a concrete structure to be continuous comprises a joint template 3 connected with the concrete structure 1, wherein a cavity 31 used for filling the retarder 2 is formed in the joint template, a grouting pipe 4 communicated with the cavity and used for injecting the retarder into the cavity is arranged at the upper end of the joint template, and grout outlet holes 5 penetrating out of the cavity are formed in the panel, close to one side of the concrete structure, of the joint template at intervals.
In this embodiment, in order to improve the intensity of seam template, be provided with horizontal baffle 9 and/or vertical baffle 8 between the two panels of seam template, the cavity of seam template is the independent cavity of a plurality of through horizontal baffle and vertical baffle partition, be provided with the trompil 10 that makes adjacent two independent cavities communicate each other on horizontal baffle and the vertical baffle respectively, vertical interval arrangement is followed to horizontal baffle, horizontal interval arrangement is followed to vertical baffle.
In this embodiment, the horizontal stiffeners 7 and/or the vertical stiffeners 6 on the non-concrete side of the joint formwork are arranged at intervals in the vertical direction, and the vertical stiffeners are arranged at intervals in the horizontal direction.
In this example, the width of the concrete adjacent the surface of the seaming formwork is 10mm ~ 25 mm.
In this embodiment, the concrete at the joint of the concrete structure is formed by pouring fiber concrete or ultra-high performance concrete, and the concrete at the rest of the concrete structure is formed by pouring common concrete, fiber concrete, high performance concrete or ultra-high performance concrete.
In this embodiment, the concrete at the joint of the concrete structure is doped with disorderly distributed fibers, and the fibers are in a flat shape, a spiral shape or a corrugated shape.
In this embodiment, the fiber content of the joint of the concrete structure is greater than that of the non-joint of the concrete structure.
In this example, the length of the fibers is 13mm ~ 50mm, and the fibers are mixed with different lengths or different types or different diameters, such as steel fibers.
When the joint of the concrete structure needs to be made by the template, the retarder is injected into the concrete in a certain width range close to the surface of the joint template in a grouting mode before initial setting after the concrete is poured. Before concrete near the joint is poured, the joint formwork is wrapped by waterproof materials such as plastic cloth and the like to prevent the concrete from entering a grout outlet, retarder is injected into the cavity of the joint formwork, certain pressure is applied, the plastic cloth is removed, and the retarder is injected into the concrete. The mixing proportion of the retarder and the washing starting time need to be determined by tests according to actual environment and materials, and are adjusted to the optimal proportion and the optimal time control.
The above is only the preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.
Claims (8)
1. The device for injecting the retarder to enable fibers at the joint of the concrete structure to be continuous is characterized by comprising a joint template connected with the concrete structure, wherein a cavity used for filling the retarder is formed in the joint template, a grouting pipe communicated with the cavity and used for injecting the retarder into the cavity is arranged at the upper end of the joint template, and grout outlet holes penetrating out of the cavity are formed in the panel, close to one side of the concrete structure, of the joint template at intervals.
2. The device for injecting retarder to continue fibers at joints of concrete structures as claimed in claim 1, wherein horizontal and/or vertical partition plates are disposed between the two panels of the joint formwork, and the horizontal and vertical partition plates are respectively provided with openings for communicating the cavities in the joint formwork with each other, and are vertically spaced and are horizontally spaced.
3. An apparatus for fiber continuity at a joint of a concrete structure by injecting retarder according to claim 1 or 2, wherein the horizontal stiffeners are vertically spaced apart and the vertical stiffeners are laterally spaced apart on the non-concrete side of the joint formwork.
4. The apparatus for fiber continuation at the joint of a concrete structure by injecting retarder according to claim 1 or 2, wherein the width of the concrete adjacent to the surface of the joint formwork is 10mm ~ 25 mm.
5. The apparatus for injecting retarder into the joint of concrete structure for fiber continuity according to claim 1 or 2, wherein the concrete at the joint of concrete structure is cast by fiber concrete or ultra high performance concrete, and the concrete at the rest of the concrete structure is cast by general concrete, fiber concrete, high performance concrete or ultra high performance concrete.
6. The device for injecting retarder to enable the fibers at the joints of the concrete structures to be continuous is characterized in that the concrete at the joints of the concrete structures is doped with disorderly distributed fibers, and the fibers are flat, spiral or corrugated.
7. The device for injecting retarder to make the concrete structure joint fiber continuous according to claim 6, wherein the fiber content at the concrete structure joint is greater than or equal to the fiber content at the concrete structure non-joint.
8. The apparatus for injecting retarder to continue fibers at joints of concrete structures as claimed in claim 6, wherein the length of the fibers is 13mm ~ 50 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920218384.2U CN209868976U (en) | 2019-02-21 | 2019-02-21 | Device for injecting retarder to enable fibers at joint of concrete structure to be continuous |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920218384.2U CN209868976U (en) | 2019-02-21 | 2019-02-21 | Device for injecting retarder to enable fibers at joint of concrete structure to be continuous |
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| CN209868976U true CN209868976U (en) | 2019-12-31 |
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| CN201920218384.2U Active CN209868976U (en) | 2019-02-21 | 2019-02-21 | Device for injecting retarder to enable fibers at joint of concrete structure to be continuous |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109719840A (en) * | 2019-02-21 | 2019-05-07 | 福州大学 | A kind of injection retarder makes concrete structure seam crossing fiber continuous apparatus and construction method |
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2019
- 2019-02-21 CN CN201920218384.2U patent/CN209868976U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109719840A (en) * | 2019-02-21 | 2019-05-07 | 福州大学 | A kind of injection retarder makes concrete structure seam crossing fiber continuous apparatus and construction method |
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