CN113263615A - Method for preparing bidirectional prestressed concrete laminated slab bottom plate by using large platform - Google Patents
Method for preparing bidirectional prestressed concrete laminated slab bottom plate by using large platform Download PDFInfo
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- CN113263615A CN113263615A CN202110636274.XA CN202110636274A CN113263615A CN 113263615 A CN113263615 A CN 113263615A CN 202110636274 A CN202110636274 A CN 202110636274A CN 113263615 A CN113263615 A CN 113263615A
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 61
- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000004567 concrete Substances 0.000 claims abstract description 54
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 239000002131 composite material Substances 0.000 claims description 21
- 238000013461 design Methods 0.000 claims description 17
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 230000002787 reinforcement Effects 0.000 abstract description 12
- 238000002360 preparation method Methods 0.000 abstract description 5
- 238000004873 anchoring Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010421 standard material Substances 0.000 description 1
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Classifications
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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
-
- 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
-
- 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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/14—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting
-
- 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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- 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
-
- 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
- B28B13/04—Discharging the shaped articles
- B28B13/06—Removing the shaped articles from moulds
-
- 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
- B28B23/043—Wire anchoring or tensioning means for the reinforcements
-
- 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
- B28B23/046—Post treatment to obtain pre-stressed articles
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
A method for preparing a two-way prestressed concrete laminated slab bottom plate by a large platform belongs to the technical field of civil engineering, the two-way prestressed concrete laminated slab bottom plate is prepared by the large platform, unloading devices on peripheral tensioning platforms are started to unload before demolding, simultaneously, tensioning forces in two directions are released, horizontal offset sizes of four corners of the two-way prestressed concrete laminated slab bottom plate on the large platform are uniformly distributed, so that the horizontal offset sizes of the four corners are minimum, and concrete and steel bars are reduced to the minimum degree after being damaged; the flexible connection measure with a certain length is adopted between the plate end prestressed reinforcement and the prestressed reinforcement locking point, so that the horizontal offset angle between the plate end prestressed reinforcement and the prestressed reinforcement locking point can be obviously reduced, the damage of the concrete and the reinforcement at the corner part of the bottom plate of the bidirectional prestressed concrete laminated slab is avoided, the preparation quality and efficiency of the bottom plate of the bidirectional prestressed concrete laminated slab are ensured, and the production cost is reduced.
Description
Technical Field
The invention belongs to the technical field of civil engineering, relates to the production of concrete products, and particularly relates to a preparation method of a bidirectional prestressed concrete laminated slab bottom plate.
Background
The prestressed concrete composite slab bottom plate is distinguished from the aspect of appearance, and has two forms of steel bars without trusses and steel bars with trusses; the area from the prestressed square is provided with a common concrete laminated slab bottom plate and a prestressed concrete laminated slab bottom plate; in the aspect of applying prestress, the prestressed concrete composite slab is divided into a one-way prestressed concrete composite slab bottom plate and a two-way prestressed concrete composite slab bottom plate.
At present, common concrete laminated slab bottom plates with truss reinforcing steel bars, one-way prestressed concrete laminated slab bottom plates without truss reinforcing steel bars and one-way prestressed concrete laminated slab bottom plates with truss reinforcing steel bars are commonly used in the market, and the common concrete laminated slab bottom plates with truss reinforcing steel bars are the most common. The bottom plates of the common concrete composite slabs have the problem of poor crack resistance, and are widely used in engineering application.
The invention patent application specification CN201810218161.6 discloses a two-way composite slab bottom plate without ribs on the plate end and the plate side and a construction method thereof, wherein the plate end and the plate side of the two-way composite slab bottom plate do not extend out of the 'beard' rib, a plurality of mechanical connecting sleeves are embedded in the plate end and the plate side, one end of each mechanical connecting sleeve is in equal-strength connection with a stressed steel bar in the two-way composite slab bottom plate, the other end of each mechanical connecting sleeve embedded in the plate end is in equal-strength connection with an anchoring steel bar, and the other end of each mechanical connecting sleeve embedded in the plate side is in equal-strength connection with a connecting steel bar. And the prefabricated bidirectional composite slab bottom plate is screwed into the matched anchoring reinforcing steel bars or connecting reinforcing steel bars in the pre-embedded connecting sleeves before or after being lifted in place. And binding upper reinforcing steel bars of the laminated slab and pouring concrete, and after the laminated layer of concrete forms strength, integrating the anchoring reinforcing steel bars or the connecting reinforcing steel bars, the connecting sleeves and the longitudinal stress reinforcing steel bars in the bottom plate into a whole to realize the stress performance of the laminated slab and the anchoring in the supporting beam or the wall. However, the application of the patent of the invention does not apply prestress to the concrete, the cracking resistance of the bottom plate of the laminated slab is poor, and the cost of connecting the steel bars at the plate end by adopting the mechanical connecting sleeve is too high, which is not beneficial to popularization and application.
The invention discloses a prestressed concrete bidirectional laminated slab and a manufacturing method thereof, and belongs to the technical field of building engineering. The invention also discloses a manufacturing method of the laminated plate. However, the prestressed reinforcement adopted in claim 5 of the invention is a stress-relief spiral rib steel wire with the diameter of 4.8mm, which is not the specification in the existing national standard of concrete structure design specification GB50010-2010(2015 edition), and the cost is increased by purchasing non-standard materials; the concrete composite slab bottom plate is manufactured in a single plate mode, under the condition of normal size, because the prestressed reinforcement is too short and is smaller than 4m under the general condition, the loss of prestress is too large, the loss of prestress is almost completely, the bidirectional prestress is difficult to establish for the concrete of the concrete composite slab bottom plate, and the effects of improving the rigidity and preventing the concrete composite slab bottom plate from cracking are difficult to achieve.
In order to improve the crack resistance of the bottom plate of the concrete composite slab, the solution is to effectively apply bidirectional prestress to the concrete of the bottom plate of the concrete composite slab. Therefore, it is necessary to develop a method for preparing a bidirectional prestressed concrete laminated slab base plate, which has the advantages of less prestress loss, simple process, higher production efficiency and lower preparation cost.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method for preparing the bidirectional prestressed concrete laminated slab bottom plate by the large platform adopts the large-size platform and effectively applies bidirectional prestress to concrete of the concrete laminated slab bottom plate through bidirectional steel bars of the bidirectional tensioned concrete laminated slab bottom plate. Under the condition that the size of a common production platform is smaller, the prestress loss is larger, the process is complex and the production efficiency is lower when bidirectional prestress is applied to the concrete of the bottom plate of the concrete laminated plate, and in order to reduce the prestress loss and improve the production efficiency, a large-size platform is an effective method; however, when the large-size platform is used for preparing the bidirectional prestressed concrete laminated slab bottom plate, the tensile force in two directions is released before demolding in the production process, the peripheral size of the concrete is greatly reduced after the concrete is compressed and contracted, and large horizontal offset and offset angles can be generated between the prestressed reinforcement at the slab ends at four corners and the prestressed reinforcement locking points, so that the concrete and the reinforcement at the corners are seriously damaged, and the production failure is caused; the invention adopts the large-size platform to prepare the bidirectional prestressed concrete laminated slab bottom plate, thereby ensuring the preparation quality and efficiency of the bidirectional prestressed concrete laminated slab bottom plate and reducing the production cost.
A method for preparing a bidirectional prestressed concrete laminated slab bottom plate by a large platform is characterized by comprising the following steps: comprises the following steps which are sequentially carried out,
step one, building a large-size platform for preparing a bidirectional prestressed concrete laminated slab bottom plate
The large platform is a rectangular plane, and the size of the long side or the short side of the large platform is 10-200 m; the periphery of the large platform is provided with a tensioning platform, and the top surface of the tensioning platform is lower than that of the large platform; an unloading device is arranged on the tensioning platform at a position 0.3-3 m away from the large platform, and a loading device is arranged on one side of the unloading device close to the large platform; the loading device is connected with the unloading device through a flexible connecting device;
step two, arranging ribs and applying prestress
Laying all concrete composite slab bottom plate steel bars including truss steel bars on a large platform according to design requirements, and laying peripheral templates including movable side forms at the outer end of the large platform; applying tension to the bidirectional longitudinal stressed steel bars of the bottom plate of the concrete composite slab including the truss steel bars by adopting a loading device, and locking all the tensioned steel bars by an anchorage device after the tension meets the design requirement; when tensioning is finished, the distance between the loading device and the outer edge of the large platform is larger than the size of the rebound and shrinkage of the tensioned steel bars unloaded by the unloading device;
step three, pouring concrete and curing
Pouring concrete on the large platform and in the templates of the peripheral movable side forms according to the design requirements, flattening the concrete, vibrating, making a rough surface on the surface, and then covering a film for maintenance;
step four, form removal and unloading
After the concrete reaches the design strength, removing the peripheral templates including the movable side forms; synchronously starting unloading devices on the peripheral tensioning platforms, wherein the unloading loading devices apply tension to the bidirectional longitudinal stressed steel bars of the bottom plate of the laminated slab including the truss steel bars, and the bidirectional longitudinal stressed steel bars of the bottom plate of the bidirectional prestressed concrete laminated slab rebound and contract to establish bidirectional pre-stress for the concrete of the bottom plate of the bidirectional prestressed concrete laminated slab;
step five, cutting out the two-way prestressed concrete superimposed sheet bottom plate
Removing exposed reinforcing steel bars on the periphery of the bottom plate of the bidirectional prestressed concrete laminated slab on the large platform, removing the coating, cutting the bottom plate of the bidirectional prestressed concrete laminated slab for the engineering concrete floor system by using a cutting machine according to the size required by the design, moving out the bottom plate of the bidirectional prestressed concrete laminated slab, and stacking for later use;
thus, the method for preparing the bidirectional prestressed concrete laminated slab bottom plate by the large platform is completed.
The flexible connecting device is made of a rope or a hinged rod.
Through the design scheme, the invention can bring the following beneficial effects: a method for preparing a bidirectional prestressed concrete laminated slab bottom plate by a large platform comprises the steps of preparing the bidirectional prestressed concrete laminated slab bottom plate by the large platform, synchronously starting unloading devices on peripheral tensioning platforms to unload before demolding in the production process, simultaneously releasing tension forces in two directions on four sides, and uniformly dividing the horizontal offset sizes of four corners of the bidirectional prestressed concrete laminated slab bottom plate on the large platform to ensure that the horizontal offset sizes of the four corners are minimum and concrete and steel bars are damaged to the minimum degree; in order to further reduce damage to corner concrete and steel bars caused by horizontal migration of four corners after concrete is compressed and contracted, a flexible connection measure with a certain length is adopted between the plate end prestressed steel bars and the prestressed steel bar locking points, so that a horizontal migration angle between the plate end prestressed steel bars and the prestressed steel bar locking points can be obviously reduced, the damage to the corner concrete and the steel bars of the bottom plate of the bidirectional prestressed concrete laminated slab is avoided, the preparation quality and efficiency of the bottom plate of the bidirectional prestressed concrete laminated slab are ensured, and the production cost is reduced.
Drawings
The invention is further described with reference to the following figures and detailed description:
FIG. 1 is a schematic cross-sectional view of a large platform and tension platform and apparatus of the present invention.
FIG. 2 is a schematic cross-sectional view of a two-way prestressed concrete composite slab base plate prepared by the large platform, the tensioning platform and the device of the present invention.
In the figure, 1-a tension platform, 2-a large platform, 3-an unloading device, 4-a flexible connecting device, 5-a loading device, 6-a movable side formwork and 7-a bidirectional prestressed concrete laminated slab bottom plate.
Detailed Description
A method for preparing a bidirectional prestressed concrete laminated slab bottom plate by a large platform is shown in figures 1 and 2, wherein L is the side length of the large platform 2, and B is the distance between an unloading device 3 and the large platform 2;
comprises the following steps which are sequentially carried out,
step one, building a large-size platform for preparing a bidirectional prestressed concrete laminated slab bottom plate
As shown in FIG. 1, the large platform 2 is a rectangular plane, the size of the long side or the short side of the large platform 2 is L, and L is more than or equal to 10m and less than or equal to 200 m; the periphery of the large platform 2 is provided with a tensioning platform 1, and the top surface of the tensioning platform 1 is lower than that of the large platform 2; taking one end of the tensioning platform 1 far away from the large platform 2 as the outer side of the tensioning platform, wherein the outer side of the tensioning platform 1 is provided with an unloading device 3, and the inner side is provided with a loading device 5; the unloading device 3 is connected with the loading device 5 through a flexible connecting device 4, and the flexible connecting device 4 is made of a rope or a hinged rod; the size of the inner side of the unloading device 3 from the large platform 2 is B, and B is more than or equal to 300mm and less than or equal to 3000 mm; a movable side die 6 is arranged on the side surface of the outer end of the large platform 2;
step two, arranging ribs and applying prestress
As shown in fig. 2, all the concrete composite slab bottom plate reinforcements including the truss reinforcements are laid according to the design requirements, and the peripheral templates including the movable side forms 6 are laid; applying tension to the bidirectional longitudinal stressed steel bars of the bottom plate of the concrete composite slab including the truss steel bars, and locking all the tensioned steel bars through an anchorage device after the tension meets the design requirement; when tensioning is finished, the distance between the loading device 5 and the outer edge of the large platform 2 is larger than the size of the rebound shrinkage deformation of the tensioned steel bars unloaded by the unloading device 3;
step three, pouring concrete and curing
As shown in fig. 2, concrete is poured on the large platform 2 and in the peripheral templates including the movable side forms 6 according to the design requirements, and the concrete is spread, vibrated, made into a rough surface and then covered with a film for maintenance;
step four, form removal and unloading
After the concrete reaches the design strength, removing the peripheral templates including the movable side forms 6; synchronously starting the unloading devices 3 on the peripheral tensioning platforms 1 for unloading, removing the tension force applied by the loading devices 5 to the bidirectional longitudinal stressed steel bars of the bottom plate of the laminated slab including the truss steel bars, and enabling the bidirectional longitudinal stressed steel bars of the bottom plate 7 of the bidirectional prestressed concrete laminated slab to rebound and contract so as to establish bidirectional pre-stress for the concrete of the bottom plate 7 of the bidirectional prestressed concrete laminated slab;
step five, cutting out the two-way prestressed concrete superimposed sheet bottom plate
Removing exposed reinforcing steel bars on the periphery of the bidirectional prestressed concrete laminated slab base plate 7 on the large platform 2, removing the coated film, cutting the bidirectional prestressed concrete laminated slab base plate 7 plate for the engineering concrete floor system by using a cutting machine according to the size required by the design, moving out the bidirectional prestressed concrete laminated slab base plate 7 plate, and stacking for later use;
thus, the method for preparing the bidirectional prestressed concrete laminated slab bottom plate by the large platform is completed.
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 (2)
1. A method for preparing a bidirectional prestressed concrete laminated slab bottom plate by a large platform is characterized by comprising the following steps: comprises the following steps which are sequentially carried out,
step one, building a large-size platform for preparing a bidirectional prestressed concrete laminated slab bottom plate
The large platform (2) is a rectangular plane, and the size of the long side or the short side of the large platform (2) is 10-200 m; the periphery of the large platform (2) is provided with a tensioning platform (1), and the top surface of the tensioning platform (1) is lower than that of the large platform (2); an unloading device (3) is arranged on the tensioning platform (1) at a position 0.3-3 m away from the large platform (2), and a loading device (5) is arranged on one side of the unloading device (3) close to the large platform (2); the loading device (5) is connected with the unloading device (3) through a flexible connecting device (4);
step two, arranging ribs and applying prestress
Laying all concrete composite slab bottom plate steel bars including truss steel bars on the large platform (2) according to design requirements, and laying peripheral templates including movable side forms (6) at the outer end of the large platform (2); applying a tension force to the bidirectional longitudinal stressed steel bars of the bottom plate of the concrete composite slab including the truss steel bars by adopting a loading device (5), and locking all the tensioned steel bars through an anchorage device after the tension force meets the design requirement; when tensioning is finished, the distance between the loading device (5) and the outer edge of the large platform (2) is larger than the rebound and shrinkage size of the tensioned steel bars unloaded by the unloading device (3);
step three, pouring concrete and curing
Pouring concrete on the large platform (2) and in the templates of the peripheral movable side forms (6) according to design requirements, flattening the concrete, vibrating, making a rough surface on the surface, and then coating a film for maintenance;
step four, form removal and unloading
After the concrete reaches the design strength, removing the peripheral templates including the movable side forms (6); synchronously starting the unloading devices (3) on the peripheral tensioning platforms (1), exerting tension force on the bidirectional longitudinal stressed steel bars of the bottom plate of the laminated slab including the truss steel bars by the unloading loading devices (5), and enabling the bidirectional longitudinal stressed steel bars of the bottom plate (7) of the bidirectional prestressed concrete laminated slab to rebound and contract so as to establish bidirectional pre-stress for the concrete of the bottom plate (7) of the bidirectional prestressed concrete laminated slab;
step five, cutting out the two-way prestressed concrete superimposed sheet bottom plate
Removing exposed reinforcing steel bars around the bidirectional prestressed concrete laminated slab bottom plate (7) on the large platform (2), removing the coated film, cutting the bidirectional prestressed concrete laminated slab bottom plate (7) plate for the engineering concrete floor system by using a cutting machine according to the size required by the design, moving out the bidirectional prestressed concrete laminated slab bottom plate (7) plate, and stacking for later use;
thus, the method for preparing the bidirectional prestressed concrete laminated slab bottom plate by the large platform is completed.
2. The method for preparing the bidirectional prestressed concrete laminated slab bottom plate by the large platform according to claim 1, which is characterized in that: the flexible connecting device (4) is made of a rope or a hinged rod.
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| CN202110636274.XA CN113263615B (en) | 2021-06-08 | 2021-06-08 | Method for preparing bidirectional prestressed concrete laminated slab bottom plate by using large platform |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115946215A (en) * | 2022-12-09 | 2023-04-11 | 浙江杭加泽通建筑节能新材料有限公司 | Blank for forming bottom plate of aerated concrete composite floor slab and forming method |
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| US4201711A (en) * | 1977-04-29 | 1980-05-06 | A-Betong Ab | Method of manufacturing prestressed construction elements in a long mould bed |
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| CN106142337A (en) * | 2015-04-22 | 2016-11-23 | 辽宁易筑建筑材料有限公司 | A kind of mechanical-moulded dry concrete base plate with ribbing and preparation method thereof |
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| CN111255135A (en) * | 2020-03-18 | 2020-06-09 | 孟凡林 | Prestressed plane truss reinforced concrete laminated slab bottom plate and preparation method thereof |
| CN211817290U (en) * | 2020-03-18 | 2020-10-30 | 孟凡林 | Prestressed plane truss reinforced concrete superimposed sheet bottom plate |
-
2021
- 2021-06-08 CN CN202110636274.XA patent/CN113263615B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4201711A (en) * | 1977-04-29 | 1980-05-06 | A-Betong Ab | Method of manufacturing prestressed construction elements in a long mould bed |
| CN102162209A (en) * | 2010-12-31 | 2011-08-24 | 北京中铁房山桥梁有限公司 | High-speed turnout switch tie for speed of 350km per hour and manufacturing method thereof |
| CN106142337A (en) * | 2015-04-22 | 2016-11-23 | 辽宁易筑建筑材料有限公司 | A kind of mechanical-moulded dry concrete base plate with ribbing and preparation method thereof |
| CN209453864U (en) * | 2018-09-21 | 2019-10-01 | 江苏华江祥瑞现代建筑发展有限公司 | It is a kind of for producing the tensioning equipment of composite beam or superimposed sheet |
| CN109203226A (en) * | 2018-10-29 | 2019-01-15 | 江苏华江祥瑞现代建筑发展有限公司 | Dual-direction pre-tensioning system prestressed complexes and the production method for using complexes |
| CN111255135A (en) * | 2020-03-18 | 2020-06-09 | 孟凡林 | Prestressed plane truss reinforced concrete laminated slab bottom plate and preparation method thereof |
| CN211817290U (en) * | 2020-03-18 | 2020-10-30 | 孟凡林 | Prestressed plane truss reinforced concrete superimposed sheet bottom plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115946215A (en) * | 2022-12-09 | 2023-04-11 | 浙江杭加泽通建筑节能新材料有限公司 | Blank for forming bottom plate of aerated concrete composite floor slab and forming method |
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|---|---|
| CN113263615B (en) | 2022-09-20 |
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