CN111216233A - Method for manufacturing reinforced concrete precast slab - Google Patents
Method for manufacturing reinforced concrete precast slab Download PDFInfo
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- CN111216233A CN111216233A CN202010018585.5A CN202010018585A CN111216233A CN 111216233 A CN111216233 A CN 111216233A CN 202010018585 A CN202010018585 A CN 202010018585A CN 111216233 A CN111216233 A CN 111216233A
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- concrete layer
- sleeve
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- concrete
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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
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
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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
- B28B1/0935—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 using only elements wholly or partly immersed in the material, e.g. cores
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/06—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced
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- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The invention belongs to the technical field of building material manufacturing, and particularly relates to a method for manufacturing a reinforced concrete precast slab, which comprises the following steps: step one, installing a mould; step two, installing steel bars; step three, pouring concrete; step four: curing the concrete layer: after the concrete layer is poured, vibrating the concrete layer by using a concrete layer vibrating device; and after the surface of the concrete layer is subjected to slurry collection, covering the surface of the concrete layer with felt, and performing watering maintenance. When the method for manufacturing the reinforced concrete precast slab provided by the invention is adopted to vibrate the poured concrete layer, different numbers of rubber rings are sleeved on the second limiting rod, and the lowest position of the second mounting seat on the second limiting rod can be adjusted, so that the lowest position of the vibrating rod can be adjusted, the maximum depth of the vibrating rod inserted into the concrete layer is accurately controlled, and the condition that the end part of the vibrating rod touches the upper surface of the bottom template is avoided.
Description
Technical Field
The invention belongs to the technical field of building material manufacturing, and particularly relates to a method for manufacturing a reinforced concrete precast slab.
Background
In the process of manufacturing the reinforced concrete precast slab, air bubbles in the concrete must be removed after the concrete is poured into the mould, so that the concrete is compactly combined, the phenomena of honeycomb pitted surface and the like of the concrete are eliminated, the strength of the concrete is improved, and the quality of the reinforced concrete precast slab is ensured. The process of eliminating air bubbles and tamping concrete is called concrete vibration. At present, in the manufacturing process of a reinforced concrete precast slab, vibration after concrete pouring is carried out by a constructor holding a vibrating rod, and the following problems exist: (1) the thickness of a concrete layer of the reinforced concrete precast slab is generally small, the insertion depth of the vibrating rod is difficult to accurately control by constructors, and the end part of the vibrating rod is easy to touch the upper surface of the bottom template, so that the bottom template is deviated or deformed, and the slurry leakage is caused; (2) when the vibrating rod is inserted into a concrete layer, the vibrating rod needs to be quickly inserted and slowly pulled out, the inserting and pulling-out speed is difficult to accurately grasp by manually holding the vibrating rod, and bubbles are easy to generate; (3) at the intensive department of reinforcing bar, constructor can only stand and operate on the reinforcing bar, causes the deformation damage to the reinforcing bar easily, and stands and lead to the tamper to touch the reinforcing bar easily under the unstable condition, causes the tamper damage.
Disclosure of Invention
Technical problem to be solved
The invention provides a method for manufacturing a reinforced concrete precast slab, aiming at solving the following problems existing in the operation of manually holding a vibrating rod at present: (1) the thickness of a concrete layer of the reinforced concrete precast slab is generally small, the insertion depth of the vibrating rod is difficult to accurately control by constructors, and the end part of the vibrating rod is easy to touch the upper surface of the bottom template, so that the bottom template is deviated or deformed, and the slurry leakage is caused; (2) when the vibrating rod is inserted into a concrete layer, the vibrating rod needs to be quickly inserted and slowly pulled out, the inserting and pulling-out speed is difficult to accurately grasp by manually holding the vibrating rod, and bubbles are easy to generate; (3) at the intensive department of reinforcing bar, constructor can only stand and operate on the reinforcing bar, causes the deformation damage to the reinforcing bar easily, and stands and lead to the tamper to touch the reinforcing bar easily under the unstable condition, causes the tamper damage.
(II) technical scheme
In order to solve the technical problems, the invention adopts the following technical scheme:
a manufacturing method of a reinforced concrete precast slab comprises the following steps:
step one, installing a die: the bottom template is horizontally placed on a prefabricated site, the side template is vertically placed at the edge of the bottom template, the bottom template and the side template are fixed together by adopting a split screw, and a release agent is coated on the surfaces of the bottom template and the side template.
Step two, installing steel bars: and welding and binding the formed steel bars, wherein a welding or binding joint is arranged at a position with smaller internal force.
Step three, pouring concrete: after the concrete is intensively mixed, the concrete is transported to a prefabricated site by a concrete transport vehicle, the concrete is vertically poured into the mold from top to bottom at a constant speed, and the position of the reinforcing steel bar is fixed in the pouring process, so that the reinforcing steel bar is prevented from deviating.
Step four: curing the concrete layer: and after the concrete layer is poured, vibrating the concrete layer by using a concrete layer vibrating device. And after the surface of the concrete layer is subjected to slurry collection, covering the surface of the concrete layer with felt, and performing watering maintenance.
And step four, the concrete layer vibrating device comprises two strip-shaped supporting plates which are positioned on the same horizontal plane and are parallel to each other, supporting rods are fixedly installed at the two ends of the supporting plates in a vertical mode, and first limiting rods perpendicular to the supporting plates are fixedly installed at the top of the supporting rods in a horizontal mode. Sliding fit has vertical first mount pad on the first gag lever post, and the top and the bottom of first mount pad are horizontal fixed mounting respectively has first mounting panel and second mounting panel. Vertical fixed mounting has two sets of second gag lever posts between first mounting panel and the second mounting panel, and sliding fit has the second mount pad on the second gag lever post, and the top level fixed mounting of second mount pad has the third mounting panel. Through holes with the same diameter and corresponding positions are formed in the first mounting plate, the second mounting plate and the third mounting plate. The diameter of the through hole is larger than that of the vibrating rod. A first spring is vertically arranged between the lower surface of the first mounting plate and the upper surface of the third mounting plate. The second mounting base is horizontally provided with a sleeve below the third mounting plate, a connecting rod is in sliding fit in the sleeve, the end part of the connecting rod, which is positioned in the sleeve, is fixedly connected with one end of a second spring, and the other end of the second spring is fixedly arranged on the inner end face of the sleeve. The end part of the connecting rod, which is positioned outside the sleeve, is fixedly provided with a semicircular rubber clamping sleeve, and the inner diameter of the rubber clamping sleeve is smaller than the diameter of the vibrating rod. A plurality of rubber rings with the same height are detachably mounted at the bottom of the second limiting rod. Before vibrating concrete layer, place the backup pad on concrete layer upper surface, will vibrate the stick and pass the through-hole on first mounting panel, third mounting panel and the second mounting panel in proper order to promote two semicircular rubber cutting ferrule compression second springs, will vibrate the stick and pass and loosen the rubber cutting ferrule behind the rubber cutting ferrule, the rubber cutting ferrule will vibrate the stick top and block under the spring action of second spring, ensures that the stick that vibrates is in vertical state. The number of the rubber rings is adjusted, so that the total height of the rubber rings stacked together is adjusted, and when the bottom surface of the second mounting seat is abutted to the top of the uppermost rubber ring, the bottom end of the vibrating rod is located at the lowest point required to be inserted into the concrete layer. After the vibrating rod is opened, the second mounting seat is slowly lifted to drive the vibrating rod to slowly lift, when the bottom of the vibrating rod leaves a concrete layer, the second mounting seat is loosened, and the elastic action of the first spring pushes the second mounting seat to rapidly move downwards, so that the vibrating rod is driven to be rapidly inserted into the concrete layer. And slowly lifting the second mounting seat again, driving the vibrating rod to slowly pull out the concrete layer, then adjusting the position of the first mounting seat on the first limiting rod until the vibrating rod reaches the top of the next insertion point, and then loosening the second mounting seat.
In the concrete layer vibrating device, the sleeve is slidably mounted on the second mounting base, and side plates parallel to the outer side wall of the sleeve are mounted on two sides of the second mounting base. And a third spring is horizontally arranged between the side plate and the outer side wall of the sleeve. Because the vibrating rod during operation lasts the vibration that produces the circumferencial direction to drive the rubber cutting ferrule and produce the vibration, and give connecting rod and sleeve with the vibration transmission, second spring and third spring synergism play the cushioning effect to connecting rod and sleeve, avoid the rubber cutting ferrule and vibrate and produce relative slip between the rod because of the vibration, thereby improved the steadiness of vibrating the rod.
As a preferred technical scheme of the invention, in the concrete layer vibrating device, a shaft sleeve is horizontally and fixedly installed on the upper surface of a first installation plate, a first rotating shaft is rotationally matched in the shaft sleeve, and an incomplete gear is vertically and fixedly installed at the end part of the first rotating shaft. And a rack meshed with the incomplete gear is vertically and fixedly arranged on the second mounting seat. A second rotating shaft parallel to the first rotating shaft is rotatably arranged on the upper surface of the first mounting plate, and the first rotating shaft is connected with the second rotating shaft through a transmission belt. The end part of the second rotating shaft is fixedly provided with a first rotating handle. When the vibrating rod works, the first rotary handle is continuously and slowly rotated to drive the incomplete gear to continuously rotate, the incomplete gear drives the rack, the second mounting seat and the vibrating rod to slowly rise, and the first spring is compressed; when the incomplete gear rotates to a state of being disengaged from the rack, the second mounting seat and the vibrating rod move downwards quickly under the elastic action of the first spring, and the vibrating rod is inserted into the concrete layer quickly.
According to the preferable technical scheme, in the concrete layer vibrating device, a screw rod parallel to a first limiting rod is rotatably mounted on a supporting rod, and the screw rod is in rotating fit with a first mounting seat. The end part of the screw rod is fixedly provided with a second rotating handle. The lead screw is driven to rotate through the second rotating handle, so that the first mounting seat is driven to slide along the first limiting rod, and the first mounting seat and the vibrating rod are accurately controlled in the horizontal direction.
As a preferred technical scheme of the invention, in the concrete layer vibrating device, a plurality of blades which are uniformly arranged along the length direction of the supporting plate are horizontally arranged on two sides of the supporting plate, so that the supporting plate can be in the horizontal position of the upper surface of a concrete layer in the working process of the vibrating rod, and the vibrating rod is always in the vertical state.
According to the preferable technical scheme, in the concrete layer vibrating device, a plurality of threaded sleeves which are uniformly arranged along the length direction of the supporting plate are vertically and fixedly arranged at the bottom of the supporting plate, and threaded rods are rotatably arranged in the threaded sleeves. The length of the threaded rod extending out of the threaded sleeve is adjusted before work, so that the total length of the threaded sleeve and the threaded rod is equal to the thickness of the concrete layer. When the vibrating rod works, the bottom of the threaded rod is supported on the bottom template, so that the supporting plate is further ensured to be positioned at the horizontal position of the upper surface of the concrete layer, and the vibrating rod is ensured to be always in a vertical state.
As a preferred technical scheme of the invention, in the concrete layer vibrating device, the end parts of the rubber clamping sleeves are provided with the insertion blocks and the grooves which are matched with each other, so that the vibrating rod is prevented from loosening due to relative movement between the two rubber clamping sleeves.
(III) advantageous effects
The invention has the following beneficial effects:
(1) when the method for manufacturing the reinforced concrete precast slab provided by the invention is adopted to vibrate the poured concrete layer, different numbers of rubber rings are sleeved on the second limiting rod, and the lowest position of the second mounting seat on the second limiting rod can be adjusted, so that the lowest position of the vibrating rod can be adjusted, the maximum depth of the vibrating rod inserted into the concrete layer is accurately controlled, and the condition that the end part of the vibrating rod touches the upper surface of the bottom template is avoided.
(2) When the method for manufacturing the reinforced concrete precast slab provided by the invention is used for vibrating the poured concrete layer, the third mounting plate is pushed to rapidly move downwards through the elastic action of the first spring, so that the vibrating rod is driven to be rapidly inserted into the concrete layer; the incomplete gear which rotates slowly drives the rack and the second mounting seat to move slowly and integrally upwards, so that the vibrating rod is driven to be slowly pulled out of the concrete layer, and bubbles are avoided. The concrete layer can be periodically and quickly inserted and slowly pulled out by continuously rotating the incomplete gear during working, and the vibrating rod is simple in structure and convenient to operate.
(3) When the method for manufacturing the reinforced concrete precast slab is adopted to vibrate the steel bar dense part of the concrete layer after the pouring is finished, the support plates are only required to be placed on the surfaces of the concrete layer at two sides of the steel bar dense part, the vibrating rod is driven by the second rotating handle to adjust the horizontal position, and the vibrating rod is driven by the first rotating handle to be periodically quickly inserted and slowly pulled; the work process need not the constructor and stands and operate on the reinforcing bar, has avoided the reinforcing bar to produce the deformation damage, and can the accurate control vibrate the horizontal position of stick through the lead screw, avoids vibrating the stick and touches the condition emergence that the reinforcing bar caused the damage of vibrating the stick.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a view illustrating steps of a method for manufacturing a reinforced concrete precast slab according to an embodiment of the present invention;
fig. 2 is a schematic view of a first three-dimensional structure of the concrete layer vibrating device in the embodiment of the invention;
fig. 3 is a schematic second perspective view of the concrete layer vibrating device according to the embodiment of the invention;
fig. 4 is a schematic view of the internal structure of the sleeve of the concrete layer vibrating device in the embodiment of the invention;
fig. 5 is a schematic view illustrating an operating state of the concrete layer vibrating device according to the embodiment of the invention;
fig. 6 is an enlarged schematic view of a concrete layer vibrating device a according to an embodiment of the present invention.
In the figure: 1-supporting plate, 2-supporting rod, 3-first limiting rod, 4-first mounting seat, 5-first mounting plate, 6-second mounting plate, 7-second limiting rod, 8-second mounting seat, 9-third mounting plate, 10-through hole, 11-first spring, 12-sleeve, 13-connecting rod, 14-second spring, 15-rubber clamping sleeve, 16-rubber ring, 17-side plate, 18-third spring, 19-shaft sleeve, 20-incomplete gear, 21-rack, 22-transmission belt, 23-first rotating handle, 24-lead screw, 25-second rotating handle, 26-blade plate, 27-thread sleeve, 28-threaded rod and 29-insert block.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 1, the present embodiment provides a method for manufacturing a reinforced concrete precast slab, including the steps of:
step one, installing a die: the bottom template is horizontally placed on a prefabricated site, the side template is vertically placed at the edge of the bottom template, the bottom template and the side template are fixed together by adopting a split screw, and a release agent is coated on the surfaces of the bottom template and the side template.
Step two, installing steel bars: and welding and binding the formed steel bars, wherein a welding or binding joint is arranged at a position with smaller internal force.
Step three, pouring concrete: after the concrete is intensively mixed, the concrete is transported to a prefabricated site by a concrete transport vehicle, the concrete is vertically poured into the mold from top to bottom at a constant speed, and the position of the reinforcing steel bar is fixed in the pouring process, so that the reinforcing steel bar is prevented from deviating.
Step four: curing the concrete layer: and after the concrete layer is poured, vibrating the concrete layer by using a concrete layer vibrating device. And after the surface of the concrete layer is subjected to slurry collection, covering the surface of the concrete layer with felt, and performing watering maintenance.
As shown in fig. 2 to 6, the concrete layer vibrating device in the fourth step includes two bar-shaped supporting plates 1 which are parallel to each other and located on the same horizontal plane, supporting rods 2 are vertically and fixedly installed at two ends of the supporting plates 1, and two first limiting rods 3 perpendicular to the supporting plates 1 are horizontally and fixedly installed at the tops of the supporting rods 2. Sliding fit has vertical first mount pad 4 on first gag lever post 3, and the top and the bottom of first mount pad 4 are horizontal fixed mounting respectively have first mounting panel 5 and second mounting panel 6. Vertical fixed mounting has two sets of second gag lever post 7 between first mounting panel 5 and the second mounting panel 6, and sliding fit has second mount pad 8 on second gag lever post 7, and the horizontal fixed mounting in top of second mount pad 8 has third mounting panel 9. The first mounting plate 5, the second mounting plate 6 and the third mounting plate 9 are provided with through holes 10 which have the same diameter and correspond to the positions. The diameter of the through hole 10 is larger than that of the vibrating rod. A first spring 11 is vertically installed between the lower surface of the first mounting plate 5 and the upper surface of the third mounting plate 9. A sleeve 12 is horizontally arranged below the third mounting plate 9 on the second mounting seat 8, a connecting rod 13 is in sliding fit with the sleeve 12, the end part of the connecting rod 13 positioned in the sleeve 12 is fixedly connected with one end of a second spring 14, and the other end of the second spring 14 is fixedly arranged on the inner end face of the sleeve 12. The end part of the connecting rod 13 positioned outside the sleeve 12 is fixedly provided with a semicircular rubber clamping sleeve 15, and the inner diameter of the rubber clamping sleeve 15 is smaller than the diameter of the vibrating rod. The bottom of the second limiting rod 7 is detachably provided with a plurality of rubber rings 16 with the same height. Before vibrating concrete layer, place backup pad 1 on concrete layer upper surface, will vibrate the stick and pass the through-hole on first mounting panel 5, third mounting panel 9 and the second mounting panel 6 in proper order to promote two semicircular rubber cutting ferrule 15 compression second springs 14, will vibrate the stick and pass rubber cutting ferrule 15 back pine rubber cutting ferrule 15, rubber cutting ferrule 15 will vibrate the stick top and block under the spring action of second springs 14, ensure that the stick that vibrates is in vertical state. The number of the rubber rings 16 is adjusted, so that the total height of the rubber rings 16 stacked together is adjusted, and when the bottom surface of the second mounting seat 8 is abutted to the top of the uppermost rubber ring 16, the bottom end of the vibrating rod is located at the lowest point required to be inserted into the concrete layer. After the vibrating rod is opened, the second mounting seat 8 is slowly lifted to drive the vibrating rod to slowly lift, when the bottom of the vibrating rod leaves a concrete layer, the second mounting seat 8 is loosened, and the elastic action of the first spring 11 pushes the second mounting seat 8 to rapidly move downwards, so that the vibrating rod is driven to be rapidly inserted into the concrete layer. Slowly promote second mount pad 8 once more, drive the vibrator and slowly extract the concrete layer, then adjust the position of first mount pad 4 on first gag lever post 3, until the vibrator reaches the top of next insertion point, loosen second mount pad 8 again can.
In this embodiment, the sleeve 12 is slidably mounted on the second mounting seat 8, and side plates 17 parallel to the outer side wall of the sleeve 12 are mounted on both sides of the second mounting seat 8. A third spring 18 is horizontally mounted between the side plate 17 and the outer side wall of the sleeve 12. Because the vibrating rod during operation lasts the vibration that produces the circumferencial direction to drive rubber cutting ferrule 15 and produce the vibration, and give connecting rod 13 and sleeve 12 with the vibration transmission, second spring 14 and third spring 18 synergism play the cushioning effect to connecting rod 13 and sleeve 12, avoid rubber cutting ferrule 15 and vibrate and produce relative slip because of the vibration between the rod, thereby improved vibrating rod's steadiness.
In this embodiment, a shaft sleeve 19 is horizontally and fixedly mounted on the upper surface of the first mounting plate 5, a first rotating shaft is rotatably fitted in the shaft sleeve 19, and an incomplete gear 20 is vertically and fixedly mounted at the end of the first rotating shaft. A rack 21 meshed with the incomplete gear 20 is vertically and fixedly arranged on the second mounting seat 8. A second rotating shaft parallel to the first rotating shaft is rotatably arranged on the upper surface of the first mounting plate 5, and the first rotating shaft and the second rotating shaft are connected through a transmission belt 22. The end of the second rotating shaft is fixedly provided with a first rotating handle 23. When the vibrating rod works, the first rotating handle 23 is continuously and slowly rotated to drive the incomplete gear 20 to continuously rotate, the incomplete gear 20 drives the rack 21, the second mounting seat 8 and the vibrating rod to slowly rise, and the first spring 11 is compressed; when the incomplete gear 20 rotates to be disengaged from the rack 21, the second mounting seat 8 and the vibrating rod rapidly move downwards under the action of the elastic force of the first spring 11, and the vibrating rod is rapidly inserted into the concrete layer.
In this embodiment, a screw 24 parallel to the first limiting rod 3 is rotatably mounted on the support rod 2, and the screw 24 is rotatably matched with the first mounting seat 4. A second rotary handle 25 is fixedly mounted on the end of the screw 24. The lead screw 24 is driven to rotate through the second rotating handle 25, so that the first mounting seat 4 is driven to slide along the first limiting rod 3, and the first mounting seat 4 and the vibrating rod are accurately controlled in the horizontal direction.
In this embodiment, the horizontal installation in backup pad 1 both sides has a plurality of to follow the 1 length direction align to grid 26 to ensure that the horizontal position that the backup pad 1 can be in the concrete layer upper surface in the vibrating rod course of operation, thereby ensure that the vibrating rod is in vertical state all the time.
In this embodiment, a plurality of threaded sleeves 27 are vertically and fixedly installed at the bottom of the support plate 1 and are uniformly arranged along the length direction of the support plate 1, and threaded rods 28 are rotatably installed in the threaded sleeves 27. The threaded rod 28 is adjusted before operation to extend the length of the threaded sleeve 27 so that the total length of the threaded sleeve 27 and the threaded rod 28 is equal to the thickness of the concrete layer. When the vibrating rod works, the bottom of the threaded rod 28 is supported on the bottom formwork, so that the supporting plate 1 is further ensured to be positioned at the horizontal position of the upper surface of a concrete layer, and the vibrating rod is ensured to be always in a vertical state.
In this embodiment, the end of the rubber ferrule 15 is provided with the plug 29 and the groove which are matched with each other, so as to avoid the occurrence of the situation that the vibrating rod is loosened due to the relative movement between the two rubber ferrules 15.
In the fourth step of this embodiment, concrete vibrating steps of the concrete vibrating device for vibrating the concrete layer are as follows: before vibrating the concrete layer, the length of the threaded rod 28 extending out of the threaded sleeve 27 is adjusted, so that the total length of the threaded sleeve 27 and the threaded rod 28 is equal to the thickness of the concrete layer, then the threaded sleeve 27 and the threaded rod 28 are inserted into the concrete layer until the bottom of the threaded rod 28 abuts against the upper surface of the bottom formwork, and the support plate 1 is located on the upper surface of the concrete layer. The vibrating rod sequentially passes through the through holes in the first mounting plate 5, the third mounting plate 9 and the second mounting plate 6, the two semicircular rubber clamping sleeves 15 are pushed to compress the second springs 14, the vibrating rod passes through the rubber clamping sleeves 15 and then the rubber clamping sleeves 15 are loosened, the rubber clamping sleeves 15 clamp the top of the vibrating rod under the elastic action of the second springs 14, and the vibrating rod is ensured to be in a vertical state. The number of the rubber rings 16 is adjusted, so that the total height of the rubber rings 16 stacked together is adjusted, and when the bottom surface of the second mounting seat 8 is abutted to the top of the uppermost rubber ring 16, the bottom end of the vibrating rod is located at the lowest point required to be inserted into the concrete layer.
After opening the vibrating rod, slowly rotate first rotatory handle 23 and drive incomplete gear 20 and continuously rotate to drive second mount pad 8 and the vibrating rod slowly and promote, when incomplete gear 20 rotated to and rack 21 disengaged state, second mount pad 8 and vibrating rod moved down fast under the spring action of first spring 11, the vibrating rod inserted in the concrete layer fast. Slowly rotate first rotation handle 23 once more and drive incomplete gear 20 and continue to rotate to drive second mount pad 8 and the slow promotion of vibrating rod, break away from the concrete layer until vibrating rod bottom. Drive lead screw 24 through the rotatory handle 25 of second and rotate to drive first mount pad 4 and slide along first gag lever post 3, reach the top of next insertion point until the stick that vibrates, rotate first rotatory handle 2 again, the stick that vibrates is quick downstream under the spring action of first spring 11, and the stick that vibrates inserts in the concrete layer fast.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A manufacturing method of a reinforced concrete precast slab is characterized in that: the manufacturing method comprises the following steps:
step one, installing a die: horizontally placing a bottom template on a prefabricated site, vertically placing a side template on the edge of the bottom template, fixing the bottom template and the side template together by adopting a counter-pull screw, and coating a release agent on the surfaces of the bottom template and the side template;
step two, installing steel bars: welding and binding the formed steel bars, wherein a welding or binding joint is arranged at a position with smaller internal force;
step three, pouring concrete: after the concrete is intensively mixed, the concrete is transported to a prefabricated site by a concrete transport vehicle, the concrete is vertically poured into the mould from top to bottom at a constant speed, and the position of the reinforcing steel bar is fixed in the pouring process so as to ensure that the reinforcing steel bar does not deviate;
step four: curing the concrete layer: after the concrete layer is poured, vibrating the concrete layer by using a concrete layer vibrating device; after the concrete layer surface is subjected to slurry collection, covering the concrete layer surface with felt, and performing watering maintenance;
the concrete layer vibrating device in the fourth step comprises two strip-shaped supporting plates (1) which are positioned on the same horizontal plane and are parallel to each other, supporting rods (2) are vertically and fixedly installed at two ends of each supporting plate (1), and two first limiting rods (3) perpendicular to the supporting plates (1) are horizontally and fixedly installed at the tops of the supporting rods (2); a vertical first mounting seat (4) is slidably matched on the first limiting rod (3), and a first mounting plate (5) and a second mounting plate (6) are horizontally and fixedly mounted at the top and the bottom of the first mounting seat (4) respectively; two groups of second limiting rods (7) are vertically and fixedly installed between the first installation plate (5) and the second installation plate (6), a second installation seat (8) is slidably matched on the second limiting rods (7), and a third installation plate (9) is horizontally and fixedly installed at the top of the second installation seat (8); through holes (10) with the same diameter and corresponding positions are formed in the first mounting plate (5), the second mounting plate (6) and the third mounting plate (9); the diameter of the through hole (10) is larger than that of the vibrating rod; a first spring (11) is vertically arranged between the lower surface of the first mounting plate (5) and the upper surface of the third mounting plate (9); a sleeve (12) is horizontally arranged on the second mounting seat (8) below the third mounting plate (9), a connecting rod (13) is in sliding fit with the sleeve (12), the end part of the connecting rod (13) positioned in the sleeve (12) is fixedly connected with one end of a second spring (14), and the other end of the second spring (14) is fixedly arranged on the inner end face of the sleeve (12); a semicircular rubber clamping sleeve (15) is fixedly arranged at the end part of the connecting rod (13) positioned outside the sleeve (12), and the inner diameter of the rubber clamping sleeve (15) is smaller than the diameter of the vibrating rod; a plurality of rubber rings (16) with the same height are detachably arranged at the bottom of the second limiting rod (7).
2. A method for manufacturing a reinforced concrete precast slab according to claim 1, wherein: in the concrete layer vibrating device, a sleeve (12) is slidably mounted on a second mounting seat (8), and side plates (17) parallel to the outer side wall of the sleeve (12) are mounted on two sides of the second mounting seat (8); a third spring (18) is horizontally arranged between the side plate (17) and the outer side wall of the sleeve (12).
3. A method for manufacturing a reinforced concrete precast slab according to claim 1, wherein: in the concrete layer vibrating device, a shaft sleeve (19) is horizontally and fixedly installed on the upper surface of a first installation plate (5), a first rotating shaft is rotationally matched in the shaft sleeve (19), and an incomplete gear (20) is vertically and fixedly installed at the end part of the first rotating shaft; a rack (21) which is meshed with the incomplete gear (20) is vertically and fixedly arranged on the second mounting seat (8); a second rotating shaft parallel to the first rotating shaft is rotatably arranged on the upper surface of the first mounting plate (5), and the first rotating shaft is connected with the second rotating shaft through a transmission belt (22); the end part of the second rotating shaft is fixedly provided with a first rotating handle (23).
4. A method for manufacturing a reinforced concrete precast slab according to claim 1, wherein: in the concrete layer vibrating device, a screw rod (24) parallel to a first limiting rod (3) is rotatably mounted on a support rod (2), and the screw rod (24) is in rotating fit with a first mounting seat (4); a second rotating handle (25) is fixedly arranged at the end part of the screw rod (24).
5. A method for manufacturing a reinforced concrete precast slab according to claim 1, wherein: in the concrete layer vibrating device, a plurality of blades (26) which are uniformly arranged along the length direction of a support plate (1) are horizontally arranged on two sides of the support plate (1).
6. A method for manufacturing a reinforced concrete precast slab according to claim 1, wherein: in the concrete layer vibrating device, a plurality of thread sleeves (27) which are uniformly arranged along the length direction of a support plate (1) are vertically and fixedly arranged at the bottom of the support plate (1), and a threaded rod (28) is rotatably arranged in each thread sleeve (27).
7. A method for manufacturing a reinforced concrete precast slab according to claim 1, wherein: in the concrete layer vibrating device, the end part of a rubber clamping sleeve (15) is provided with an inserting block (29) and a groove which are matched with each other.
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| CN202010018585.5A CN111216233A (en) | 2020-01-08 | 2020-01-08 | Method for manufacturing reinforced concrete precast slab |
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| CN202010018585.5A CN111216233A (en) | 2020-01-08 | 2020-01-08 | Method for manufacturing reinforced concrete precast slab |
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| CN117359750A (en) * | 2023-12-08 | 2024-01-09 | 莆田中建建设发展有限公司 | Super-thick concrete member construction device and construction technology thereof |
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