CN110774409B - Production method of precast beam with end grooves - Google Patents
Production method of precast beam with end grooves Download PDFInfo
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- CN110774409B CN110774409B CN201910917731.5A CN201910917731A CN110774409B CN 110774409 B CN110774409 B CN 110774409B CN 201910917731 A CN201910917731 A CN 201910917731A CN 110774409 B CN110774409 B CN 110774409B
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- groove
- plate
- precast beam
- shaped body
- precast
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/04—Producing shaped prefabricated articles from the material by tamping or ramming
- B28B1/045—Producing shaped prefabricated articles from the material by tamping or ramming combined with vibrating or jolting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/093—Producing shaped prefabricated articles from the material by vibrating or jolting by means directly acting on the material, e.g. by cores wholly or partly immersed in the material or elements acting on the upper surface of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/20—Moulds for making shaped articles with undercut recesses, e.g. dovetails
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
- B28B7/388—Treating surfaces of moulds, cores, or mandrels to prevent sticking with liquid material, e.g. lubricating
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a method for producing a precast beam with a groove at the end part, the precast beam is a precast part of a full precast beam or a superposed beam, the top surface of one end of the precast beam is provided with a groove communicated with the side surface, a shearing resisting assembly is fixed in the groove, the shearing resisting assembly comprises a fixed shaft and a plate-shaped body, the first end of the plate-shaped body is provided with a through hole with the inner diameter larger than that of the fixed shaft, the fixed shaft penetrates through the through hole, and the two ends of the fixed shaft are anchored in concrete at the two side surfaces of the groove, the method comprises the following steps: s1, placing a groove die at a preset position in an outer die of the precast beam, arranging a shear assembly between the groove die and the end part of the outer die opposite to the groove die, and fixing two ends of a fixed shaft on the groove die; s2, arranging a pre-buried lifting appliance in an outer die of the precast beam, and then pouring concrete and vibrating, curing and forming; and S3, removing the outer die. By adopting the production method in the scheme, the die does not need to be reformed, the universality of the outer die is improved, the die reforming cost is reduced, and the production cost is reduced.
Description
Technical Field
The invention belongs to the technical field of assembly type buildings, and particularly relates to a production method of a precast beam with an end groove.
Background
In an assembly type building, prefabricated components such as prefabricated beams, prefabricated columns and the like are produced in a factory and then transported to a construction site for assembly. The beam-column connecting structure bears the main stress and earthquake-resistant functions of a building, so that the requirement on the mechanical property of the beam-column connecting structure is high. In the prior art, a beam-column connecting structure has two modes of cast-in-place connection and pure dry connection, and the pure dry connection is mainly realized by arranging a steel corbel on a prefabricated column and then placing a prefabricated beam on the steel corbel. Set up like this, the bracket exposes influences indoor wall pleasing to the eye, and the tolerance nature and the adjustment nature of job site are relatively poor moreover, and the shear behavior at precast beam end is not enough, when meetting external force destruction such as earthquake, and the beam-ends drops from the bracket easily. The applicant has previously developed a precast beam with enhanced shear resistance, in which a groove is formed at an end of the precast beam, and then a shear resistant assembly is disposed in the groove to ensure the connection strength and the seismic resistance between the precast beam and the precast column. Aiming at the precast beam with the groove at the end part, the outer die for production needs to be transformed to form the groove after concrete is poured. The cost for transforming the outer die is high, and the universality is poor, so that a production method for a precast beam with a groove arranged at the end part needs to be developed at present, so that the cost for transforming the die is reduced, and the production efficiency is improved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the production method of the precast beam provided with the end grooves is provided, so that the die transformation cost is reduced, and the production efficiency is improved.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for producing a precast girder provided with an end groove, the precast girder being a precast part of a full precast girder or a composite girder, the precast girder having a groove communicating with a side surface at a top surface of one end thereof, a shear assembly fixed inside the groove, the shear assembly including a fixing shaft and a plate-shaped body, the plate-shaped body having a first end provided with a passing hole having an inner diameter greater than that of the fixing shaft, the fixing shaft passing through the passing hole and having both ends anchored in concrete at both side surfaces of the groove, comprising the steps of:
s1, placing a groove die at a preset position in an outer die of the precast beam, arranging a shear assembly between the groove die and the end part of the outer die opposite to the groove die, and fixing two ends of a fixed shaft on the groove die;
s2, arranging a pre-buried lifting appliance in an outer die of the precast beam, and then pouring concrete and vibrating, curing and forming;
and S3, removing the outer die and hoisting the precast beam.
Preferably, the groove mold in the step S1 is a thin steel plate or a net-shaped partition plate or a foam mold, wherein a groove is defined between the thin steel plate or the net-shaped partition plate and the outer mold, and the foam mold has the same size as the groove and is provided with a cavity for accommodating the shear assembly.
Preferably, in step S3, when the foam mold is used as the groove mold, the foam mold is removed after the outer mold is removed.
Preferably, step S1 further includes brushing a release agent on the inner surface of the outer mold.
Preferably, in step S1, the distance between the fixed shaft and the bottom surface of the groove mold is greater than the distance between the through hole and the first end edge of the plate-shaped body.
Preferably, the width of the plate-like body is smaller than the depth of the groove; the height of the plate-shaped body is less than that of the groove.
Preferably, the plate-shaped body comprises two flat plates which are parallel to each other, a reinforcing rod is arranged between the second ends of the two flat plates, and the two ends of the reinforcing rod are connected with the two flat plates.
The technical scheme of the invention has the beneficial technical effects that:
when the end of the precast beam is provided with the groove, the groove die is arranged during production, and the groove can be formed after concrete is poured; when the thin steel plate or the net-shaped partition plate is used as the groove die, demoulding is not needed after concrete curing and forming, so that the production efficiency is improved, the labor intensity of workers is reduced, and the production cost of the precast beam is reduced; when the foam mold is used as a groove mold, the pressure resistance and the impact resistance are strong, the cost is low, and the demolding is convenient. By adopting the production method in the scheme, the outer die for producing the beam is not required to be modified, the universality of the outer die is improved, the die modification cost is reduced, and the production cost is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic perspective view of a precast beam in example 1;
FIG. 2 is a schematic perspective view of a shear resistant assembly in example 1;
reference numerals: 1-precast beam, 2-groove, 3-shearing resistant component, 4-fixed shaft, 5-flat plate, 6-reinforcing rod, 7-through hole, 8-reticular clapboard and 9-metal box.
Detailed Description
The present invention will now be described in detail with reference to the drawings, which are given by way of illustration and explanation only and should not be construed to limit the scope of the present invention in any way. Furthermore, features from embodiments in this document and from different embodiments may be combined accordingly by a person skilled in the art from the description in this document.
Example 1
Referring to the schematic diagram 1, the precast beam 1 in this embodiment is a full precast beam 1, a groove 2 is disposed at a middle position of a top surface of one end of the precast beam 1, the groove 2 is communicated with a side surface of the precast beam 1, a mesh partition plate 8 is embedded in a side wall of the groove 2, and a shear assembly 3 is fixed inside the groove 2. Referring also to fig. 2, the shear assembly 3 includes a stationary shaft 4 and a plate-shaped body having a first end provided with a passing hole 7 having an inner diameter larger than that of the stationary shaft 4, the stationary shaft 4 passing through the passing hole 7 and having both ends anchored in the concrete at the middle and lower portions of both sides of the recess 2. The platelike body comprises two flat plates 5 which are parallel to each other, a reinforcing rod 6 is arranged between the second ends of the two flat plates 5, and the two ends of the reinforcing rod 6 are connected with the two flat plates 5. By means of the arrangement, the stress area and the shearing resistance of the shearing assembly 3 are enhanced. Referring to fig. 1, in the present embodiment, the width of the plate-like body is smaller than the depth of the groove 2, the height of the plate-like body is smaller than the height of the groove 2, and the distance between the fixed shaft 4 and the bottom surface of the groove 2 is greater than the distance between the passing hole 7 and the edge of the first end of the plate-like body. So that the plate-like body is accommodated in the groove 2 without the edge protruding beyond the side end faces of the precast girders 1; and the plate-shaped body can rotate around the fixed shaft 4 in the groove 2 towards the outside of the precast beam 1, that is, can be vertically or horizontally placed around the fixed shaft 4. The anti-shearing assembly is arranged in the groove and is pre-embedded in the concrete of the groove during production; thus, the production is convenient, and the requirement on the production precision is not high; during transportation, the anti-shearing assembly is arranged in the groove and cannot stretch out of the end face of the precast beam, so that the collision of the anti-shearing assembly on the precast member during loading and transportation is reduced. In the field construction process of the beam-column connecting structure, the plate-shaped body of the anti-shearing assembly in the groove rotates around the fixed shaft, the second end of the plate-shaped body can be placed in the groove which is formed in the prefabricated column in advance, after concrete is poured in the groove of the prefabricated beam and the groove of the prefabricated column, the two ends of the plate-shaped body are respectively anchored in the groove of the prefabricated beam and the groove of the prefabricated column, the anti-shearing capability between the prefabricated beam and the prefabricated column is improved, and the reliability and the safety of the beam-column connecting node are guaranteed.
In other embodiments, the precast girders are precast sections of composite girders, so that the concrete of the cast-in-place section needs to be poured on the top sides of the precast sections at the construction site.
With continued reference to fig. 1, the method for producing a precast beam provided with end grooves in the present embodiment includes the steps of:
s1, placing a mesh partition plate at a preset position in an outer mould of the precast beam, arranging a shear assembly between the mesh partition plate and the end part of the outer mould opposite to the mesh partition plate, fixing two ends of a fixed shaft on the mesh partition plate, and ensuring that the distance between the fixed shaft and the bottom surface of the groove mould is greater than the distance between a through hole and the edge of the first end of the plate-shaped body; then brushing a release agent on the inner wall of the outer die;
s2, arranging a pre-buried lifting appliance in an outer die of the precast beam, and then pouring concrete and vibrating, curing and forming;
and S3, removing the outer die and hoisting the precast beam.
In another embodiment, in the step S1, a thin steel plate is used to replace the net-shaped partition plate, when the thin steel plate is used, a groove is formed between the thin steel plate and the outer mold, fixing holes matched with the outer diameter of the fixing shaft are symmetrically formed on two side walls of the thin steel plate, the plate-shaped body is vertically placed, and two ends of the fixing shaft are clamped in the fixing holes of the two side walls of the thin steel plate. The thin steel plate is required to be prepared into a box body with missing vertical side surfaces and top surfaces and the same size as the groove in advance, in step S1, the box body prepared by the thin steel plate is placed in an outer die for precast beam production, and it is ensured that the open vertical side surfaces face the inner wall of the outer die and the open top surfaces face, and then the distance between two vertical side walls of the thin steel plate and the side walls of the outer die is equal to the thickness of the concrete layer on two sides of the groove of the precast beam.
In another embodiment, in the step S1, a foam mold is used to replace the net-shaped partition plate, the size of the foam mold is the same as that of the groove, a cavity for accommodating the shear-resistant component is formed on the side surface of the foam mold, the shear-resistant component is fixed in the cavity, and then the foam mold is placed at a predetermined position of the outer mold of the precast beam; in step S3, after the outer mold is removed, the foam mold needs to be removed again.
By adopting the production method in the scheme, the outer die for producing the beam is not required to be modified, the universality of the outer die is improved, the die modification cost is reduced, and the production cost is reduced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A method for manufacturing a precast girder provided with an end groove, the precast girder being a precast portion of a full precast girder or a composite girder, a top surface of one end of the precast girder being provided with a groove communicating with a side surface, a shear assembly being fixed inside the groove, the shear assembly including a fixing shaft and a plate-shaped body, a width of the plate-shaped body being smaller than a depth of the groove, a height of the plate-shaped body being smaller than a height of the groove, the plate-shaped body including a first end and a second end, the first end of the plate-shaped body being provided with a pass hole having an inner diameter larger than that of the fixing shaft, the fixing shaft passing through the pass hole and having both ends anchored in concrete on both side surfaces of the groove, the method comprising the steps of:
s1, placing a groove mould at a preset position in an outer mould of the precast beam, arranging a shearing resisting assembly between the groove mould and the end part of the outer mould opposite to the groove mould, fixing two ends of a fixed shaft on the groove mould, wherein the distance between the fixed shaft and the bottom surface of the groove mould is larger than that between a through hole and the edge of the first end of a plate-shaped body, the plate-shaped body can rotate around the fixed shaft in the groove towards the outer side of the precast beam, namely the plate-shaped body can be vertically placed or horizontally placed around the fixed shaft, and when the plate-shaped body is horizontally placed, the second end of the plate-shaped body extends out of the groove;
s2, arranging a pre-buried lifting appliance in an outer die of the precast beam, and then pouring concrete and vibrating, curing and forming;
and S3, removing the outer die and hoisting the precast beam.
2. The method for manufacturing a precast beam provided with an end groove according to claim 1, wherein the groove mold in the step S1 is a thin steel plate or a net-shaped partition plate or a foam mold, wherein a groove is defined between the thin steel plate or the net-shaped partition plate and the outer mold, and the foam mold has the same size as the groove and is provided with a cavity for accommodating the shear module.
3. The method for manufacturing a precast beam provided with an end groove according to claim 2, wherein when the foam mold is the groove mold, the foam mold is removed after the outer mold is removed at step S3.
4. The method for producing a precast beam provided with an end groove according to claim 2, wherein the step S1 further comprises brushing a release agent inside the outer mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910917731.5A CN110774409B (en) | 2019-09-26 | 2019-09-26 | Production method of precast beam with end grooves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910917731.5A CN110774409B (en) | 2019-09-26 | 2019-09-26 | Production method of precast beam with end grooves |
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| Publication Number | Publication Date |
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| CN110774409A CN110774409A (en) | 2020-02-11 |
| CN110774409B true CN110774409B (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910917731.5A Active CN110774409B (en) | 2019-09-26 | 2019-09-26 | Production method of precast beam with end grooves |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204645415U (en) * | 2015-05-20 | 2015-09-16 | 中民筑友有限公司 | A kind of precast beam with liner plate |
| CN107053456A (en) * | 2017-05-04 | 2017-08-18 | 浙江绿筑集成科技有限公司 | Combine the preparation method of prefabricated components in a kind of web holes cast-type part |
| CN207549035U (en) * | 2017-09-19 | 2018-06-29 | 中民筑友（长沙）绿建科技有限公司 | A kind of precast beam molding die |
| CN110341029A (en) * | 2019-06-25 | 2019-10-18 | 中国十七冶集团有限公司 | A kind of detachable Steel-wood forming board combination unit and its application method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8572788B2 (en) * | 2010-05-05 | 2013-11-05 | Nathan A. Kurek | Concrete diaphragm including form spanning between spaced-apart longitudinal members |
-
2019
- 2019-09-26 CN CN201910917731.5A patent/CN110774409B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204645415U (en) * | 2015-05-20 | 2015-09-16 | 中民筑友有限公司 | A kind of precast beam with liner plate |
| CN107053456A (en) * | 2017-05-04 | 2017-08-18 | 浙江绿筑集成科技有限公司 | Combine the preparation method of prefabricated components in a kind of web holes cast-type part |
| CN207549035U (en) * | 2017-09-19 | 2018-06-29 | 中民筑友（长沙）绿建科技有限公司 | A kind of precast beam molding die |
| CN110341029A (en) * | 2019-06-25 | 2019-10-18 | 中国十七冶集团有限公司 | A kind of detachable Steel-wood forming board combination unit and its application method |
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| Publication number | Publication date |
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| CN110774409A (en) | 2020-02-11 |
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Address after: No. 410000, shaping street, Changsha, Kaifu City, Hunan Province Patentee after: Zhuyou Zhizao Technology Industry Group Co.,Ltd. Address before: 10 Zhongshi Road, shaping street, Kaifu District, Changsha City, Hunan Province Patentee before: Zhongmin zhuyou Technology Industry Co.,Ltd. |
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Effective date of registration: 20211221 Address after: 5 / F, office building 2, Zhongmin zhuyou Co., Ltd., No. 10, Zhongshi Road, shaping street, Kaifu District, Changsha City, Hunan Province, 410000 Patentee after: Zhuyou Zhizao Technology Investment Co.,Ltd. Address before: No. 410000, shaping street, Changsha, Kaifu City, Hunan Province Patentee before: Zhuyou Zhizao Technology Industry Group Co.,Ltd. |