CN112282219A - Special cushion block for prefabricated beam web and manufacturing method thereof - Google Patents
Special cushion block for prefabricated beam web and manufacturing method thereof Download PDFInfo
- Publication number
- CN112282219A CN112282219A CN202011116104.0A CN202011116104A CN112282219A CN 112282219 A CN112282219 A CN 112282219A CN 202011116104 A CN202011116104 A CN 202011116104A CN 112282219 A CN112282219 A CN 112282219A
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- cushion block
- manufacturing
- beam web
- pressing
- machine
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
- E04C5/203—Circular and spherical spacers
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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
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
- B28B13/027—Feeding the moulding material in measured quantities from a container or silo by using a removable belt or conveyor transferring the moulding material to the moulding cavities
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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
- B28B23/022—Means for inserting reinforcing members into the mould or for supporting them in the mould
- B28B23/024—Supporting means
-
- 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
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Abstract
The invention relates to the field of precast beam web construction, in particular to a special cushion block for a precast beam web and a manufacturing method thereof, wherein the cushion block is provided with an opening clamping groove, a wire binding circular hole and sawteeth, so that the installation and the fixation are convenient, the contact area between the cushion block and a template is reduced, the phenomenon that slurry of an exposed thin layer falls off to generate a mark is avoided, and the appearance of a beam body is improved; the manufacturing method of the special cushion block for the prefabricated beam web comprises the steps of factory setting, construction preparation, mold manufacturing, mixing, material distribution, pressing, demolding, maintenance, stacking, packaging and putting in use, can adopt self-production processing, is accurate and uniform in size, dense in concrete and guaranteed in strength, improves the thickness qualification rate of a steel bar protective layer, saves cost, saves freight cost and transportation loss for purchasing the cushion block, is equipped by construction machinery and personnel, is high in construction speed, and is suitable for various kinds of span prefabricated box girders.
Description
Technical Field
The invention relates to the field of precast beam web construction, in particular to a special cushion block for a precast beam web and a manufacturing method thereof.
Background
In the construction of precast beam plates in recent years, the requirements on the thickness of a protective layer of a beam body and the appearance quality of the beam body are gradually improved, and a cement mortar cushion block is generally used for control at present. Longitudinal steel bars are arranged on two sides of a box girder web plate according to the design specification of highway reinforced concrete and prestressed concrete bridges and culverts (JTG 3362). And a closed annular cushion block is penetrated into the longitudinal steel bar, so that the requirement on the thickness of a steel bar protective layer is met. The design has adopted in recent years to set up the vertical horizontal muscle of box girder web inboard at the vertical reinforcing bar of web, and original closed annular concrete cushion just can not satisfy the operation requirement, and what replace thereupon is open type annular cushion, and this cushion imbeds the vertical reinforcing bar of web with the opening part, has realized the control requirement of protective layer thickness equally. However, because the contact area between the cushion block and the template is large, the appearance of the exposed surface of the cushion block cannot be eliminated, and the appearance of the beam body is greatly reduced due to the existence of the cushion block marks. When the formwork is removed initially, the surface of the concrete has no mark, after a plurality of days of placing and water spraying for maintenance, thin-layer slurry on the surface of a contact point of the cushion block and the formwork gradually falls off to form the mark, and partial contact points have partial color difference with the beam body even if the contact points do not fall off. The main reason for this problem is that the pad block contacts the template coated with grease to adsorb the grease, and the thin layer of slurry falls off by water washing and other external forces. Therefore, the special cushion block for the prefabricated beam web and the manufacturing method thereof are provided.
Disclosure of Invention
The invention aims to solve the problems that thin-layer slurry on the surface of a contact point of a cushion block and a template gradually falls off to generate marks, and partial contact points have partial color difference with a beam body even if the contact points do not fall off, and provides the cushion block special for the prefabricated beam web and the manufacturing method thereof.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: the utility model provides a special cushion of precast beam web, includes the cushion body, set up the opening draw-in groove on the cushion body, opening draw-in groove both sides respectively set up one and tie up a silk round hole, the front end of the cushion body sets up the sawtooth, the thickness of the cushion body is 20 mm.
Preferably, the depth of the saw teeth is 5-6 mm.
A manufacturing method of a cushion block special for a prefabricated web plate comprises the following steps:
a. setting a plant area and preparing construction; the method comprises the steps that a health preserving shed and a finished product storage warehouse are erected in a factory area, a packing machine and a sealing machine are installed in the finished product storage warehouse, construction preparation comprises the steps of installing equipment for mixing, distributing and pressing, and debugging is carried out on the equipment;
b. manufacturing a mould; processing and molding the production mold according to the design requirements of the thickness of the protective layer, the diameter of the binding steel bar and the like, and measuring whether the specific size of the mold meets the design requirements or not;
c. mixing; designing the mixing proportion of the raw materials for manufacturing the cushion block according to requirements, putting the raw materials into mixing equipment, and uniformly stirring;
d. distributing; conveying the uniformly stirred mortar to a distributing machine through a conveying belt, placing the manufactured mold below the distributing machine, and repeatedly distributing the mortar above a mold groove by the distributing machine for four times;
e. pressing; placing the mould filled with the mortar under a pressure head of a forming machine for pressing;
f. demolding; after pressing is finished, inserting a supporting plate at the lower part of the die, and continuously pressing a pressure head to demould the cushion block;
g. maintaining; and (4) putting the demoulded cushion blocks into a curing shed for curing, checking the finished cushion blocks one by one in the curing period, picking out defective finished products for abandoning, and sending the residual qualified products into a finished product storage warehouse.
h. Stacking and packaging; packaging by a packaging machine and a sealing machine, and stacking in a finished product storage warehouse;
i. and (5) putting for use.
Preferably, the health preserving shed is built by sunlight plates, the indoor temperature and humidity are kept, and an automatic spraying device is further installed in the health preserving shed.
Preferably, one side surface of the die is an open clamping groove, the other side surface of the die is closed, two round holes are formed in two sides of the open clamping groove, the shape of the inner cavity of the die is consistent with that of the cushion block, one end of the inner cavity of the die is provided with an open clamping groove model, and the other end of the inner cavity of the die is provided with a sawtooth model.
Preferably, the forming machine adopts a concrete multifunctional forming machine, the pressure head has 2000KN of pressure during pressing and holds the load for 10 s.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts the gear with the structure depth at the contact position with the template when manufacturing the cushion block, meets the requirement of the thickness of the protective layer, reduces the contact area of the cushion block and the template, can ensure that the slurry of the exposed thin layer is connected with the cushion block and the beam body in a reinforcing way, and the thin layer can not fall off and generate marks, thereby improving the appearance of the beam body.
2. The invention is convenient to install and fix, the vertical reinforcing steel bars of the web plate are embedded in the open clamping grooves and are bound by binding wires, and the thickness of the protective layer can be controlled even if the binding positions are not perpendicular to the reinforcing steel bars.
3. The invention is manufactured and processed according to the design thickness of the protective layer, improves the pass percent of the thickness of the steel bar protective layer, saves the cost and saves the transportation cost and the transportation loss of purchasing the cushion block.
4. The invention can adopt self-production processing, has accurate and uniform size, compact concrete and guaranteed strength, is equipped by construction machinery and personnel, has high construction speed and is suitable for various span prefabricated box girders.
Drawings
FIG. 1 is a flow chart of a method for manufacturing a cushion block special for a precast beam web according to the present invention;
FIG. 2 is a schematic structural diagram of a special spacer for a precast beam web according to the present invention;
FIG. 3 is a schematic structural diagram of a die for a precast beam web special cushion block according to the present invention.
In the figure: 1. a pad body; 2. an open neck; 3. binding wire round holes; 4. and (4) saw teeth.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
As shown in figures 1-3, the cushion block special for the prefabricated beam web comprises a cushion block body 1, wherein an opening clamping groove 2 is formed in the cushion block body 1, the opening clamping groove 2 is embedded into vertical steel bars of the web, and wire binding round holes 3 are formed in two sides of the opening clamping groove 2 respectively, so that the wire binding penetrates into the wire binding round holes 3 to be fixed with steel bars in a binding mode, the thickness of the cushion block body 1 is 20mm, and the requirement of the thickness of a protective layer is met. The front end of the cushion block body 1 is provided with saw teeth 4, and the depth of the saw teeth 4 is 5-6 mm. Reduce the area of contact of cushion and template, can guarantee to leak outward thin layer slurry and cushion and roof beam body and strengthen linking for this thin layer can not drop, can not produce the impression, thereby makes the outward appearance of roof beam body obtain promoting.
A manufacturing method of a cushion block special for a prefabricated web plate comprises the following steps:
a. setting a plant area and preparing construction; the factory setting comprises building a health shed and a finished product storage warehouse, wherein the health shed is built by sunlight plates and keeps indoor temperature and humidity, and an automatic spraying device is further mounted in the health shed and has an automatic spraying function and a temperature and humidity keeping function; a packer and a sealing machine are arranged in a finished product storage warehouse, equipment for mixing, distributing and pressing is prepared for construction, the equipment is debugged, and a production bracket adopts a plastic template so as to ensure that the production bracket does not expand and deform after being soaked in health-preserving water.
b. Manufacturing a mould; according to requirements such as protective layer thickness design requirement, ligature reinforcing bar diameter, will produce the mould machine-shaping, whether the concrete size of measuration mould accords with the design requirement, a mould side is the opening draw-in groove, another side is for sealing, be equipped with two round holes in opening draw-in groove both sides, the mould inner chamber shape is unanimous with the cushion shape, one end sets up the opening draw-in groove and models, the other end sets up the sawtooth molding, guarantee that cushion and template laminating can not crowd the cushion and break up, sawtooth molding degree of depth 5-6mm, guarantee that concrete thick liquid can be full of the sawtooth, thereby realize reducing with template area of contact, simultaneously the thin layer thick liquid that leaks is with cushion and roof beam.
c. Mixing; designing raw materials for manufacturing the cushion block according to the mixture ratio as required, wherein the raw materials are cement and sand, the cement is Jidong p.o52.5 ordinary portland cement, the sand is natural river sand (the fineness modulus is 2.6, the bulk density is 1410Kg/m3, the mud content is less than 0.2 percent), and the water-cement ratio is 0.35; the raw materials are put into a mixing device and are uniformly mixed, and the mixing device adopts an JZW400 model vertical mortar mixer.
d. Distributing; conveying the uniformly stirred mortar to a distributing machine through a conveying belt, placing the manufactured mold below the distributing machine, and distributing the mortar repeatedly above the mold grooves by the distributing machine for four times to ensure uniform distribution in each groove.
e. Pressing; and (3) placing the mould filled with the mortar under a pressure head of a forming machine for pressing, wherein the forming machine adopts a static pressure 200 type concrete multifunctional forming machine, and the pressure of the pressure head is 2000KN during pressing and the load is held for 10 s.
f. Demolding; after pressing, inserting a supporting plate at the lower part of the die, and continuously pressing a pressure head to demould the cushion block.
g. Maintaining; and (4) putting the demoulded cushion blocks into a curing shed for curing, checking the finished cushion blocks one by one in the curing period, picking out defective finished products for abandoning, and sending the residual qualified products into a finished product storage warehouse.
h. Stacking and packaging; packaging by a packaging machine and a sealing machine, and stacking in a finished product storage warehouse;
i. and (5) putting for use.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a special cushion of precast beam web, includes pad body (1), its characterized in that, set up opening draw-in groove (2) on pad body (1), opening draw-in groove (2) both sides respectively set up one and tie up a silk round hole (3), the front end of pad body (1) sets up sawtooth (4), the thickness of pad body (1) is 20 mm.
2. The special cushion block for the precast beam web according to claim 1, wherein the depth of the saw teeth (4) is 5-6 mm.
3. The manufacturing method of the special cushion block for the precast beam web as claimed in claim 2, is characterized in that the manufacturing method comprises the following steps:
a. setting a plant area and preparing construction; the method comprises the steps that a health preserving shed and a finished product storage warehouse are erected in a factory area, a packing machine and a sealing machine are installed in the finished product storage warehouse, construction preparation comprises the steps of installing equipment for mixing, distributing and pressing, and debugging is carried out on the equipment;
b. manufacturing a mould; processing and molding the production mold according to the design requirements of the thickness of the protective layer, the diameter of the binding steel bar and the like, and measuring whether the specific size of the mold meets the design requirements or not;
c. mixing; designing the mixing proportion of the raw materials for manufacturing the cushion block according to requirements, putting the raw materials into mixing equipment, and uniformly stirring;
d. distributing; conveying the uniformly stirred mortar to a distributing machine through a conveying belt, placing the manufactured mold below the distributing machine, and repeatedly distributing the mortar above a mold groove by the distributing machine for four times;
e. pressing; placing the mould filled with the mortar under a pressure head of a forming machine for pressing;
f. demolding; after pressing is finished, inserting a supporting plate at the lower part of the die, and continuously pressing a pressure head to demould the cushion block;
g. maintaining; and (4) putting the demoulded cushion blocks into a curing shed for curing, checking the finished cushion blocks one by one in the curing period, picking out defective finished products for abandoning, and sending the residual qualified products into a finished product storage warehouse.
h. Stacking and packaging; packaging by a packaging machine and a sealing machine, and stacking in a finished product storage warehouse;
i. and (5) putting for use.
4. The manufacturing method of the cushion block specially used for the precast beam web plate as claimed in claim 3, wherein the curing shed is built by sunlight plates, the indoor temperature and humidity are kept, and an automatic spraying device is further installed in the curing shed.
5. The manufacturing method of the cushion block special for the precast beam web plate as claimed in claim 3, wherein one side surface of the mold is an open slot, the other side surface is closed, two round holes are arranged on two sides of the open slot, the shape of the inner cavity of the mold is consistent with that of the cushion block, one end of the inner cavity is provided with an open slot shape, and the other end of the inner cavity is provided with a sawtooth shape.
6. The method for manufacturing the special cushion block for the precast beam web as claimed in claim 3, wherein the forming machine is a multifunctional concrete forming machine, and the pressure head applies a pressure of 2000KN for 10s during pressing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011116104.0A CN112282219A (en) | 2020-10-19 | 2020-10-19 | Special cushion block for prefabricated beam web and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011116104.0A CN112282219A (en) | 2020-10-19 | 2020-10-19 | Special cushion block for prefabricated beam web and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112282219A true CN112282219A (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011116104.0A Pending CN112282219A (en) | 2020-10-19 | 2020-10-19 | Special cushion block for prefabricated beam web and manufacturing method thereof |
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| Country | Link |
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| CN (1) | CN112282219A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB818538A (en) * | 1957-08-23 | 1959-08-19 | Ferdinand William Berry | Improvements in spacer members for the reinforcement in reinforced concrete structures |
| BE744418A (en) * | 1969-01-16 | 1970-06-15 | Celmac Plasclip Ltd | PLASTIC CLAP FOR SUPPORTING REINFORCING BARS IN CONCRETE |
| DE2200512A1 (en) * | 1971-01-06 | 1972-07-20 | Giuseppe Cennerelli | Spacer for reinforcement bars |
| CN2581575Y (en) * | 2002-04-24 | 2003-10-22 | 陆金星 | Steel concrete protective layer spacer block |
| US20110120045A1 (en) * | 2009-11-25 | 2011-05-26 | Gavin Peter W | Universal spacer for concrete reinforcement rods and wire |
| CN104086128A (en) * | 2014-07-17 | 2014-10-08 | 桓台县果里镇常沣建材经销处 | Concrete strutting piece and preparation technology thereof |
| CN205777116U (en) * | 2016-05-20 | 2016-12-07 | 中交一航局第四工程有限公司 | The light reinforced fixture of shear wall construction is built in room |
| CN111152342A (en) * | 2020-01-21 | 2020-05-15 | 广州中领实业有限公司 | Cement cushion block die and manufacturing method of cement cushion block |
| CN210887796U (en) * | 2019-09-24 | 2020-06-30 | 高邮市水利规划设计室 | Embedded steel bar protection layer cushion block |
-
2020
- 2020-10-19 CN CN202011116104.0A patent/CN112282219A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB818538A (en) * | 1957-08-23 | 1959-08-19 | Ferdinand William Berry | Improvements in spacer members for the reinforcement in reinforced concrete structures |
| BE744418A (en) * | 1969-01-16 | 1970-06-15 | Celmac Plasclip Ltd | PLASTIC CLAP FOR SUPPORTING REINFORCING BARS IN CONCRETE |
| DE2200512A1 (en) * | 1971-01-06 | 1972-07-20 | Giuseppe Cennerelli | Spacer for reinforcement bars |
| CN2581575Y (en) * | 2002-04-24 | 2003-10-22 | 陆金星 | Steel concrete protective layer spacer block |
| US20110120045A1 (en) * | 2009-11-25 | 2011-05-26 | Gavin Peter W | Universal spacer for concrete reinforcement rods and wire |
| CN104086128A (en) * | 2014-07-17 | 2014-10-08 | 桓台县果里镇常沣建材经销处 | Concrete strutting piece and preparation technology thereof |
| CN205777116U (en) * | 2016-05-20 | 2016-12-07 | 中交一航局第四工程有限公司 | The light reinforced fixture of shear wall construction is built in room |
| CN210887796U (en) * | 2019-09-24 | 2020-06-30 | 高邮市水利规划设计室 | Embedded steel bar protection layer cushion block |
| CN111152342A (en) * | 2020-01-21 | 2020-05-15 | 广州中领实业有限公司 | Cement cushion block die and manufacturing method of cement cushion block |
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Application publication date: 20210129 |
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