CN212498282U - Separated prefabricated prestressed concrete slab type stair - Google Patents
Separated prefabricated prestressed concrete slab type stair Download PDFInfo
- Publication number
- CN212498282U CN212498282U CN202021862056.5U CN202021862056U CN212498282U CN 212498282 U CN212498282 U CN 212498282U CN 202021862056 U CN202021862056 U CN 202021862056U CN 212498282 U CN212498282 U CN 212498282U
- Authority
- CN
- China
- Prior art keywords
- stair
- prefabricated
- concrete slab
- slab
- prestressed concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Steps, Ramps, And Handrails (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The utility model relates to the technical field of assembly type buildings, in particular to a separated type prefabricated prestressed concrete slab stair, the prior slab stair has heavy self weight and complex production process, the separated type prefabricated prestressed concrete slab stair comprises a stair body, the stair body sequentially comprises an upper platform plate, a stair section plate and a lower platform plate which are integrally formed from top to bottom, prestressed steel bars are arranged at the lower part in the stair body along the length direction, the surfaces of the upper platform plate and the lower platform plate are respectively provided with a reserved mounting hole and a reserved hole reinforcing rib, the stair section plate is provided with a lifting point and a demolding lifting point, the prestressed reinforcement is provided with a reserved prestressed reinforcement plugging groove at the reinforcement outlet hole of each plane plate, 20% of concrete is saved compared with the traditional prefabricated stair, 30% of reinforcement is saved, the self weight is small, the prefabricated stair can be produced quickly, and the prefabricated stair has a good development prospect in the technical field of assembly type buildings.
Description
Technical Field
The utility model relates to an assembly type structure technical field especially relates to prefabricated prestressed concrete slab stair of disconnect-type.
Background
With the continuous promotion of the sustainable development concept of China, the aggravation of the labor force advantage crisis, the rapid development of novel urbanization, the implementation of the concepts of low-carbon economy, energy conservation, environmental protection and the like, the prefabricated assembled stairway conforms to the development concept of innovation, coordination, green, openness and sharing advocated by the nation, and is a necessary trend for developing low-carbon economy and green construction.
Compared with the traditional cast-in-place stair production mode, the prefabricated stair has remarkable advantages. Nowadays, prefabricated integral building is popularized and developed nationwide, prefabricated stairs are listed in a preferred prefabricated member list in many places, and the prefabricated stair is high in use repetition rate, simple to produce and manufacture, efficient in construction, relatively low in manufacturing cost and environment-friendly and becomes an indispensable element in the prefabricated integral building.
In the prefabricated and assembled integral building construction process, the weight of a single prefabricated part of the plate type stair can reach 4-5 tons, the weight of the single prefabricated part becomes a key factor of the specification configuration of the tower crane, too much concrete and steel bar resources are wasted, in addition, the self weight increase causes the prefabricated stair to be difficult to hoist, transport and install and easy to crack, and a novel prefabricated stair is necessary to be researched aiming at the problems so as to better meet the practical requirement.
SUMMERY OF THE UTILITY MODEL
To the above situation, for overcoming prior art's defect, the utility model provides a disconnect-type precast prestressed concrete slab stair solves slab stair from the problem that great, production technology is complicated.
Its technical scheme is, disconnect-type precast prestressed concrete slab stair, including the stair body, stair body top-down includes integrated into one piece's upper landing slab, bench board and lower landing slab in proper order, this internal lower part of stair arranges prestressed reinforcement along length direction, upper landing slab and lower landing slab surface have respectively reserves the mounting hole and set up the reservation hole strengthening rib, the bench board has to lift by crane hoisting point and drawing of patterns hoisting point, prestressed reinforcement sets up reservation prestressed reinforcement shutoff groove in the play muscle hole department of each plane board.
Furthermore, the hoisting points comprise a group of hoisting points and two groups of hoisting points, and the distance between the group of hoisting points and the upper platform plate is the same as the distance between the two groups of hoisting points and the lower platform plate.
Furthermore, the stair section plate comprises a plurality of stair surfaces, and anti-slip strips are arranged on the stair surfaces respectively.
Furthermore, the stair bodies are combined to form an integral stair, namely, each single stair body is used as a separated prefabricated prestressed concrete slab stair, and the integral prefabricated prestressed concrete slab stair can be formed in an assembling mode.
Furthermore, the stair body is manufactured by adopting a long-line platform tensioning pedestal and applying a vertical row production process of a pre-tensioning method.
The production method of the separated prefabricated prestressed concrete slab stair comprises the following steps:
s1, manufacturing a mold: the quick-release pre-tensioning precast prestressed concrete slab stair mold meeting production requirements is designed according to the size of a component and comprises a bottom plate side mold, a tread side mold, a rib-penetrating hole side mold, an end plate side mold, a base, a connecting fastener, a reserved pin hole tooling piece and a hoisting point tooling piece, wherein each side mold of the mold can be removed in advance before the mold is not placed for tensioning, so that the turnover efficiency of the mold is improved;
s2, cleaning a mold base and coating a water-based release agent;
s3, binding a common steel bar framework in the mold;
s4, erecting a side mold: connecting the tread side die and the end plate side die with a base through bolts, coating an aqueous release agent, placing the bound reinforcement cage into a die, erecting a cushion block, installing a pin hole tool and an internal thread sleeve of a hoisting point, and binding a pin hole reinforcing rib;
s5, passing the prestressed tendons and tensioning: blanking prestressed reinforcements according to the length required by production, penetrating the prestressed reinforcements from one end of the tensioning frame hole to the other end of the tensioning frame hole, and anchoring and tensioning by using an anchorage device;
s6, die assembly: connecting the stair bottom plate side mold and the rib hole side mold coated with the water-carrying release agent with the base through bolts to form a whole;
s7, mounting a demolding hanging point: mounting a demoulding lifting point through a fixed tool, and ensuring the accuracy of the position of the lifting point;
s8, concrete distribution, vibration and surface collection: pouring the mixture in a mold through a hopper, simultaneously manufacturing at least three groups of concrete test blocks cured under the same conditions, vibrating by using a vibrating rod in time after pouring, avoiding the positions of the embedded part and the prestressed reinforcement, and finishing the surface collection work before the initial setting of the concrete;
s9, removing the mold: testing the strength of the concrete, and removing the side mold with the step, the end plates at two ends, the bottom plate side mold and the reinforcement hole side mold when the strength of the concrete reaches 13.5 MPa;
s10, natural maintenance: sprinkling water to the prefabricated prestressed stairs, covering and naturally maintaining;
s11, releasing and tensioning the prestressed reinforcing steel bars when the compressive strength of the test block under the same condition reaches 75% of the designed compressive strength standard value, and demoulding and hoisting after the strength of the test block under the same condition reaches 100% of the designed value.
Furthermore, a foaming sealing strip is pasted between the side die of the die and the contact surface of the base, and the foaming sealing strip keeps flat and straight.
The installation method of the separated type prefabricated prestressed concrete slab type stair comprises the step of connecting an upper platform slab and a lower platform slab with a stair beam reserved in a construction site through a reserved installation hole which is sleeved on a vertical reinforcing bar reserved on the stair beam.
Further, go up the landing slab and lower landing slab, wherein the landing slab is connected for fixed hinge support, and lower landing slab is connected for the slip hinge support, fixed hinge support pours into the grout material and fixes, the slip hinge support carries out the closing cap through the nut gasket.
The utility model has the technical effects that 1, the vertical row production process of the pretensioning method is adopted to realize batch production by adopting the tensioning pedestal of the long wire platform, the noodle collection is easy, and the quality is easy to ensure; 2. the used mould is split, and the mould is quickly disassembled by utilizing the split end side mould, so that the production efficiency is improved; 3. by applying prestress on the prestressed reinforcement at the lower part of the separated prefabricated prestressed concrete slab type stair body and adopting an assembling mode, the components are thinned, the dead weight is reduced, the span is enlarged, and 20% of concrete and 30% of reinforcement are saved compared with the traditional prefabricated stair; compared with the traditional cast-in-place stair, the separated prefabricated prestressed concrete slab stair is prefabricated in a factory, a large number of templates can be saved, the site construction process is simple, site wet operation and support are not needed, the energy-saving and environment-friendly benefits are obvious, the raised dust and pollution of a construction site are reduced, and the prestressed slab stair manufacturing industry is in a leading level in China.
Drawings
Fig. 1 is a schematic view of the oblique vertical structure of the present invention.
Fig. 2 is the assembly effect schematic diagram of the utility model.
Fig. 3 is a schematic view of the reinforcement structure of the present invention.
Fig. 4 is the utility model discloses reserve prestressing tendons shutoff groove structure sketch map.
Fig. 5 is a schematic plan view of the vertical row production line of the pre-tensioning method of the present invention.
In the figure: 1. the stair comprises a stair body, 2 long-line platform tensioning pedestals, 3 integral stairs, 4 pre-stressed hole reinforcing ribs, 5 pre-stressed steel bars, 6 lifting hoisting points, 7 demolding hoisting points, 8 upper platform plates, 9 lower platform plates, 10 stair section plates, 11 anti-skid strips, 12 pre-stressed mounting holes and 13 pre-stressed steel bar plugging grooves.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: by figure 1 to 5 give, disconnect-type precast prestressed concrete slab stair, including stair body 1, 1 top-down of stair body includes integrated into one piece's upper landing slab 8, bench board 10 and lower landing slab 9 in proper order, prestressing steel 5 is arranged along length direction to the lower part in the stair body 1, upper landing slab 8 has respectively with lower landing slab 9 surface and reserves mounting hole 12 and sets up reservation hole strengthening rib 4, bench board 10 has to lift by crane hoisting point 6 and drawing of patterns hoisting point 7, prestressing steel 5 sets up reservation prestressing steel shutoff groove 13 in the play muscle hole department of each plane board.
Example two: on the basis of the first embodiment, the lifting points 6 include a group of lifting points and two groups of lifting points, the distance between the group of lifting points and the upper platform plate 8 is the same as the distance between the two groups of lifting points and the lower platform plate 9, the step plate 10 includes a plurality of step surfaces, and the step surfaces are respectively provided with the anti-skid strips 11.
In the above embodiment, the prestressed reinforcement steel bar is a 1570 level phi H9.0 stress-relieving spiral rib steel wire.
Example three: in the above embodiment, each single stair body 1 is used as a separate prefabricated prestressed concrete slab stair, and an integral prefabricated prestressed concrete slab stair can be formed in an assembling mode, the strength grade of the concrete used is C45, and the thickness of the steel bar protective layer is 20 mm.
Example four: in the above embodiment, the stair body 1 is manufactured by using the long-line platform tensioning pedestal 2 and using a vertical row production process of a pretensioning method.
Example five: the production method of the separated prefabricated prestressed concrete slab stair comprises the following steps:
the separated prefabricated prestressed concrete slab stair adopts a separated prestressed concrete stair mold which can be detached in advance after concrete is finally set;
s1, manufacturing a mold: the quick-release pre-tensioning precast prestressed concrete slab stair mold meeting the production requirements is designed according to the sizes of components and comprises a bottom plate side mold, a tread side mold, a rib-penetrating hole side mold, an end plate side mold, a base, a connecting fastener, a reserved pin hole tooling piece and a hoisting point tooling piece, wherein the mold is made of Q235 steel through processing, and each side mold of the mold can be removed in advance before releasing and tensioning is achieved, so that the turnover efficiency of the mold is improved;
s2, cleaning a mold base and coating a water-based release agent;
s3, binding a common steel bar framework in the mold;
s4, erecting a side mold: connecting the tread side die and the end plate side die with a base through bolts, coating an aqueous release agent, placing the bound reinforcement cage into a die, erecting a cushion block, installing a pin hole tool and an internal thread sleeve of a hoisting point, wherein the model of the internal thread sleeve is M20, and binding a pin hole reinforcing rib;
s5, passing the prestressed tendons and tensioning: blanking the prestressed reinforcement 5 according to the length required by production, penetrating the prestressed reinforcement from a tensioning frame hole at one end to a tensioning frame hole at the other end, anchoring and tensioning by using an anchorage device, wherein the tensioning control stress coefficient is 0.7, the tensioning program is to control the stress from 0 to 20 percent, then controlling the stress, and holding the load for 2 minutes;
s6, die assembly: connecting the stair bottom plate side mold and the rib hole side mold coated with the water-carrying release agent with the base through bolts to form a whole;
s7, mounting a demolding hanging point: the demolding hoisting points 7 are installed through a fixed tool, the accuracy of the positions of the hoisting points is ensured, the number of the demolding hoisting points 7 is two, and the demolding hoisting points are symmetrically arranged on the stair body 1, so that the uniform stress in the hoisting process is ensured;
s8, concrete distribution, vibration and surface collection: pouring the mixture in a mold through a hopper, simultaneously manufacturing at least three groups of concrete test blocks cured under the same conditions, vibrating by using a vibrating rod in time after pouring, avoiding the positions of the embedded part and the prestressed reinforcement, and finishing the surface collection work before the initial setting of the concrete;
s9, removing the mold: testing the strength of the concrete, and removing the side mold with the step, the end plates at two ends, the bottom plate side mold and the reinforcement hole side mold when the strength of the concrete reaches 30 percent of the strength, namely 13.5 MPa;
s10, natural maintenance: sprinkling water to the prefabricated prestressed stairs, covering and naturally maintaining;
s11, releasing and tensioning the prestressed reinforcing steel bars when the compressive strength of the test block under the same condition reaches 75% of the designed compressive strength standard value, and demoulding and hoisting after the strength of the test block under the same condition reaches 100% of the designed value.
On the basis of the embodiment, paste the foaming sealing strip between mould side forms and the base contact surface, the foaming sealing strip keeps levelly and smoothly straight, and foaming sealing strip thickness is 5mm, and the concrete slump is not more than 120mm, and the deviation control is within 10, and the particle diameter of coarse aggregate is no longer than 20mm, and the leveling course thickness is not more than 5mm after the precast prestressed concrete slab stair is screeded.
Example six: according to the installation method of the separated type prefabricated prestressed concrete slab type stair, the upper platform slab 8 and the lower platform slab 9 are sleeved on the vertical reinforcing steel bars reserved on the on-site stair section beam through the reserved installation holes 12 and are connected with the stair beam reserved on the construction site.
On the basis of above-mentioned embodiment, go up the landing slab 8 and lower landing slab 9, wherein go up the landing slab 8 and connect for fixed hinge support, lower landing slab 9 is connected for the slip hinge support, fixed hinge support pours into the grout material and fixes, the slip hinge support carries out the closing cap through the nut gasket.
The utility model has the technical effects that 1, the vertical row production process of the pretensioning method is adopted to realize batch production by adopting the tensioning pedestal of the long wire platform, the noodle collection is easy, and the quality is easy to ensure; 2. the used mould is split, and the mould is quickly disassembled by utilizing the split end side mould, so that the production efficiency is improved; 3. by applying prestress on the prestressed reinforcement at the lower part of the separated prefabricated prestressed concrete slab type stair body and adopting an assembling mode, the components are thinned, the dead weight is reduced, the span is enlarged, and 20% of concrete and 30% of reinforcement are saved compared with the traditional prefabricated stair; compared with the traditional cast-in-place stair, the separated prefabricated prestressed concrete slab stair is prefabricated in a factory, a large number of templates can be saved, the site construction process is simple, site wet operation and support are not needed, the energy-saving and environment-friendly benefits are obvious, the raised dust and pollution of a construction site are reduced, and the prestressed slab stair manufacturing industry is in a leading level in China.
The present invention has been described in detail with reference to the specific embodiments and examples, but these should not be construed as limitations of the present invention. Numerous variations and modifications can be made by those skilled in the art without departing from the principles of the invention, which should also be considered as within the scope of the invention.
Claims (4)
1. Prefabricated prestressed concrete slab stair of disconnect-type, including stair body (1), its characterized in that, stair body (1) top-down includes integrated into one piece's upper landing board (8), bench board (10) and lower landing board (9) in proper order, prestressing steel (5) are arranged along length direction to the lower part in stair body (1), upper landing board (8) and lower landing board (9) surface have respectively and reserve mounting hole (12) and set up reservation hole strengthening rib (4), bench board (10) have hoisting point (6) and drawing of patterns hoisting point (7), prestressing steel (5) set up in the play muscle hole department of each plane board and reserve prestressing steel shutoff groove (13).
2. The split prefabricated prestressed concrete slab stairway according to claim 1, wherein said lifting points (6) comprise a set of lifting points and two sets of lifting points, said set of lifting points being located at the same distance from the upper platform slab (8) and said set of lifting points being located at the same distance from the lower platform slab (9).
3. The split prefabricated prestressed concrete slab stair of claim 1, wherein said stair flight slab (10) comprises a plurality of stair tread surfaces, each of which is provided with a non-slip strip (11).
4. The split type prefabricated prestressed concrete slab stair of claim 1, wherein each stair body (1) is combined to form an integral stair (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021862056.5U CN212498282U (en) | 2020-08-31 | 2020-08-31 | Separated prefabricated prestressed concrete slab type stair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021862056.5U CN212498282U (en) | 2020-08-31 | 2020-08-31 | Separated prefabricated prestressed concrete slab type stair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212498282U true CN212498282U (en) | 2021-02-09 |
Family
ID=74385297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021862056.5U Active CN212498282U (en) | 2020-08-31 | 2020-08-31 | Separated prefabricated prestressed concrete slab type stair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212498282U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323300A (en) * | 2021-05-06 | 2021-08-31 | 浙江省建工集团有限责任公司 | Beam type stair convenient to demould and manufacturing method thereof |
-
2020
- 2020-08-31 CN CN202021862056.5U patent/CN212498282U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323300A (en) * | 2021-05-06 | 2021-08-31 | 浙江省建工集团有限责任公司 | Beam type stair convenient to demould and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111958815A (en) | Separated prefabricated prestressed concrete slab stair and production process thereof | |
| CN105756252B9 (en) | Prestressed concrete truss laminated slab and manufacturing method thereof | |
| CN1298947C (en) | Wall body heat insulating construction method | |
| CN108149819B (en) | Integrated superposed outer wall of building bottom reinforcing area and production and construction method thereof | |
| CN212498282U (en) | Separated prefabricated prestressed concrete slab type stair | |
| CN108560842B (en) | Precast concrete stair section with multipurpose holes and preparation and application thereof | |
| CN107345439A (en) | A kind of making of precast stair component and installation method | |
| CN207959751U (en) | A kind of precast prestressed concrete beam formula stair | |
| CN219987958U (en) | Combined bridge deck prefabrication die | |
| CN109868751B (en) | Assembled track beam concrete post-pouring notch, template and construction method | |
| CN109732773B (en) | Mounting node and mounting method of support hinged concrete prefabricated part | |
| CN210195036U (en) | Groove type composite beam | |
| CN107503479A (en) | Precast stair plate and its concrete formulation | |
| CN113152810A (en) | Light steel building bearing type superposed stair and construction method | |
| CN207633665U (en) | Precast stair plate | |
| CN112659334A (en) | Concrete stair manufacturing mold, concrete stair manufacturing method and concrete stair | |
| CN220434312U (en) | UHPC reinforcement layer construction structure of concrete column | |
| CN110847355A (en) | Novel efficient mounting node assembly integral beam column and production design method thereof | |
| CN111139985A (en) | Prefabricated combination stair part of assembled | |
| CN111005558A (en) | Mould for manufacturing basic cavity concrete mould and using method thereof | |
| CN110843095A (en) | Concrete box mould, manufacturing method thereof and mould-dismantling-free building method | |
| CN213563313U (en) | Quick-release pretensioning prestressed plate type stair mold | |
| CN215671157U (en) | Prefabricated construction of control floor thickness | |
| CN220100338U (en) | Prefabricated floor | |
| CN217949579U (en) | Prefabricated bare concrete assembly plate type stair |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |