CN112412067A - Accurate positioning method for prefabricated staircase - Google Patents
Accurate positioning method for prefabricated staircase Download PDFInfo
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- CN112412067A CN112412067A CN202011303224.1A CN202011303224A CN112412067A CN 112412067 A CN112412067 A CN 112412067A CN 202011303224 A CN202011303224 A CN 202011303224A CN 112412067 A CN112412067 A CN 112412067A
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- embedded steel
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- positioning
- steel plate
- prefabricated staircase
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/26—Implements for finishing work on buildings for mounting staircases, e.g. tools for marking steps
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Steps, Ramps, And Handrails (AREA)
Abstract
The invention discloses a method for accurately positioning a prefabricated staircase, which comprises the following steps: s1, prefabricating a stair auxiliary positioning device; the auxiliary positioning device for the stairs comprises an embedded steel plate with a plurality of vertical convex columns at the lower end and a positioning support which is detachably arranged on the embedded steel plate, wherein the positioning support consists of an angle steel and an angle plate; s2, roughly prefabricating the corner positions of the stairs on the stair interfaces; s3, pre-burying an embedded steel plate at the corner position; s4, accurately releasing the mounting corner positions of the stairs on each embedded steel plate, placing angle steel of the positioning support corresponding to the corner positions, and fixing the angle steel on the embedded steel plates; and S5, hoisting the prefabricated staircase above the positioning support, enabling two opposite angles of the prefabricated staircase to correspond to the angle steel of the positioning support, and lowering the prefabricated staircase after the two opposite angles correspond to the angle steel.
Description
Technical Field
The invention belongs to an assembly method of an assembly type building, and particularly relates to an accurate positioning method of a prefabricated staircase.
Background
The prefabricated staircase is prefabricated the shaping back at the mill with the stair, transports the job site after and installs, compares in traditional cast-in-place stair, need not to erect the template, also need not to water the maintenance, has solved the problem that cast-in-place stair technology is loaded down with trivial details, the efficiency of construction is low, very big reduction the time limit for a project, consequently adopted by more and more engineering.
Generally, the installation of the prefabricated staircase is realized by adopting the following steps: pouring and prefabricating a stair interface, maintaining, arranging a mortar leveling layer on the stair interface, hoisting the prefabricated stair, correcting the prefabricated stair, fixing the prefabricated stair and the stair interface, and protecting a finished product. In the above-mentioned work progress, there is the precision not enough when hoist and mount prefabricated staircase, is difficult to guarantee the problem of the accuracy of the plane position and the elevation of stair installation. After the elevator is hoisted in place, the elevator is generally finely adjusted by a crowbar, and the edges and corners of the stairs are easily damaged. The prefabricated staircase is generally made of fair-faced concrete, decoration is not performed on the prefabricated staircase, once edges and corners are damaged, the prefabricated staircase is not easy to repair, and the appearance is affected by color difference.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide one kind can reduce the prefabricated stair hoist and mount degree of difficulty to prefabricated stair accurate positioning, simultaneously, can not influence prefabricated stair outward appearance, and prefabricated stair location and the swift prefabricated stair accurate positioning method of installation.
In order to solve the technical problems, the invention adopts the following technical scheme:
the precise positioning method for the prefabricated staircase is characterized by comprising the following steps of: s1, prefabricating the stair auxiliary positioning device in a factory; the auxiliary positioning device for the stairs comprises an embedded steel plate and a positioning support, wherein a plurality of vertical protruding columns are arranged at the lower end of the embedded steel plate, the positioning support consists of an angle steel and an angle plate which is connected to the bottom of the angle steel and arranged on the outer side of the angle steel, and the angle plate is detachably fixed on the embedded steel plate; s2, roughly positioning the installation corner position of each prefabricated staircase before pouring each staircase interface, wherein the corner positions of two staircase interfaces corresponding to each prefabricated staircase are distributed diagonally; s3, respectively embedding an embedded steel plate at the corner positions of the two stair interfaces in S2, wherein the vertical convex columns of the embedded steel plates are placed downwards, and the upper end surfaces of the embedded steel plates and the pouring plane of the stair interfaces are positioned on the same plane or emerge out of the pouring plane; s4, accurately releasing the positions of the stair installation corner points on each embedded steel plate, drawing horizontal and longitudinal control lines on the embedded steel plates, aligning the inner sides of the angle steels of the positioning supports with the horizontal and longitudinal control lines, and finally, fixedly installing the angle plates of the positioning supports on the embedded steel plates; s5, hoisting the prefabricated staircase, then stabilizing the prefabricated staircase after hoisting the prefabricated staircase above the positioning support, then adjusting the position and the angle of the prefabricated staircase to enable two opposite angles of the prefabricated staircase to correspond to the inner sides of the angle steels of the positioning support, slowly lowering the prefabricated staircase along the inner sides of the angle steels after the two opposite angles correspond to each other, and completing the positioning of the prefabricated staircase after the prefabricated staircase is placed on the embedded steel plate. Like this, prefabricated staircase auxiliary positioning device fixed mounting is on each stair interface, and include a locating support, the angle steel setting of locating support is at the edge that prefabricated stair top or bottom were marked time, and be vertical setting, and through the edge of unwrapping wire accurate positioning at prefabricated stair mounted position, thereby can regard as the extension of prefabricated stair corner in vertical direction, the adjustment of advance going on the position before prefabricated stair take one's place, in order to avoid taking one's place the back secondary fine setting, ensure that prefabricated stair can once only transfer and target in place, need not to finely tune with the crowbar secondary, make prefabricated stair cause the damage. The vertical convex columns at the lower ends of the embedded steel plates are embedded in the stair interface, so that the position stability of the embedded steel plates can be ensured, and the embedded steel plates cannot deviate due to external force. The positioning support is detachably arranged on the embedded steel plate, so that the prefabricated staircase can be fixed and then can be detached for recycling. In addition, the embedded steel plate is initially positioned, the installation position of the positioning support is accurately positioned, and the auxiliary positioning device is installed by adopting the double positioning step, so that the prefabricated staircase can be effectively ensured to be hoisted in place at one time.
Furthermore, each embedded steel plate is provided with an adjusting sliding chute which is a rectangular through groove or consists of four strip-shaped grooves which are distributed in a rectangular shape; the angle plate of the positioning support is tightly pressed and fixed on the embedded steel plate through two movable pressing plates, the two movable pressing plates are arranged in a cross-shaped overlapping mode and can slide along two opposite sides of the adjusting sliding groove and are positioned. Like this, adopt the activity clamp plate to compress tightly on the scute to the mode of fixing in each activity clamp plate both ends, can fix the location support, realized that the location support can dismantle the purpose of fixing on pre-buried steel sheet. The adjusting sliding groove can ensure that the movable pressing plate can slide along the edge direction of the adjusting sliding groove, so that the fixing position of the positioning support can be adjusted after the fixing position of the positioning support slides, and the fixing requirements of the positioning support under different conditions can be met.
Furthermore, the movable pressing plate is in a long strip shape, a positioning sliding groove is respectively arranged at two ends of each movable pressing plate along the length direction of each movable pressing plate, and the positioning sliding grooves are partially overlapped with the adjusting sliding grooves on the embedded steel plates. Therefore, after the positioning sliding grooves arranged at the two ends of the movable pressing plate are partially overlapped with the adjusting sliding grooves in a crossed manner, the subsequent fasteners can be conveniently arranged and installed in a penetrating manner.
Furthermore, after the bolts at the two ends of each movable pressing plate sequentially penetrate through the positioning chute and the adjusting chute, the movable pressing plates and the embedded steel plate are matched with a locking nut and fixed on the embedded steel plate; the bolt can slide in the length direction of the adjusting chute. Like this, adopt the mode of bolt and nut fastening to carry out fixed mounting to movable clamp plate, realized that movable clamp plate can dismantle fixed purpose, and the fixed mode of fastener is mechanical fixed mode, and fastening effect is good, can ensure that the location support can not appear shifting under external force.
Further, before pouring the stair interface concrete, when placing the embedded steel plate, a foam plate with the lower end extending out of the embedded steel plate needs to be filled in an adjusting chute of the embedded steel plate, four bolts with upward screws and nuts embedded in the foam plate penetrate through the adjusting chute of the embedded steel plate, and each bolt corresponds to one side of the adjusting chute; after concrete is finally set in the stair interface, each foam plate is taken out, each bolt penetrates through the movable pressing plate and then is matched with the locking nut, two ends of the movable pressing plate are fixed on the embedded steel plate, and the diagonal plates are pressed and fixed. Therefore, when the foam board filled when the positioning steel plate is installed is taken out after concrete is solidified, a sliding space for sliding the bolt can be formed in the stair interface. Meanwhile, the foam is in a fragile shape, so that the foam can be taken out conveniently in the later period.
Furthermore, the pre-buried depth of the vertical convex column is at least two thirds of the thickness of the stair connector. Like this, can effectively ensure that the pre-buried degree of depth of vertical projection is enough big, concrete fine steadiness.
Furthermore, the vertical convex column is a screw rod and is fixed below the embedded steel plate through welding. Therefore, the vertical convex column is a screw rod, so that the connection strength between the vertical convex column and concrete can be effectively increased.
Furthermore, a layer of antirust coating is arranged on the positioning steel plate. Like this, the rust-resistant coating can effectively guarantee that the location steel sheet can not appear the situation of rustting under the erosion of cement and water.
Further, before concrete of the stair interface is poured, a layer of release agent is smeared on the outer end face of the foam board. In this way, no foam remains in the concrete when the foam is taken out.
Furthermore, the angle plate is L-shaped and is integrally formed with the angle steel, and the width of the angle plate is larger than that of the movable pressing plate. Like this, the scute area is enough big, and pre-buried steel sheet between have sufficient fixed space, and can also ensure that the angle steel can realize standing under the effect of scute, the later stage of being convenient for is fixed the location support.
Drawings
FIG. 1 is a schematic perspective view of an auxiliary positioning device according to an embodiment;
FIG. 2 is a schematic view of the lowering state of the stairs in the embodiment;
fig. 3 is a schematic structural diagram of the pre-buried state of the pre-buried steel plate in the embodiment.
In the figure: the prefabricated staircase comprises a pre-buried steel plate 1, an adjusting sliding groove 11, a vertical convex column 12, a movable pressing plate 2, a positioning sliding groove 21, a bolt 3, a locking nut 4, a positioning support 5, angle steel 51, an angle plate 52, a staircase interface 6, a prefabricated staircase 7 and a foam plate 8.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Example (b):
as shown in fig. 1 to fig. 3, the method for accurately positioning the prefabricated staircase provided by this embodiment includes the following steps: s1, prefabricating the stair auxiliary positioning device in a factory; the auxiliary positioning device for the stairs comprises an embedded steel plate 1 and a positioning support 5, wherein the lower end of the embedded steel plate 1 is provided with a plurality of vertical protruding columns 12 (four vertical protruding columns are arranged and distributed in a rectangular shape), the embedded steel plate 1 is provided with an adjusting sliding chute 11, and the adjusting sliding chute 11 is a rectangular through groove or consists of four strip-shaped grooves distributed in a rectangular shape; the positioning support 5 consists of an angle steel 51 and an angle plate 52 which is connected to the bottom of the angle steel 51 and is arranged on the outer side of the angle steel 51, and the angle plate 52 is detachably fixed on the embedded steel plate 1; the angle plate 52 is pressed on the embedded steel plate 1 through two movable pressing plates 2 in a cross overlapping shape, is arranged at two ends of each movable pressing plate 2, is provided with an upward screw, and is tightly pressed and fixed on the embedded steel plate 1 after the end part of the screw penetrates through the adjusting chute 11 of the embedded steel plate 1 and the movable pressing plate 2 in sequence and is matched with the locking nut 5; s2, roughly positioning the installation corner position of each prefabricated staircase before pouring each staircase interface 6, wherein the corner positions of two staircase interfaces 6 corresponding to each prefabricated staircase 7 are distributed diagonally; s3, embedding an embedded steel plate before pouring concrete of the stair interface 6, specifically, embedding an embedded steel plate 1 at the corner positions of two stair interfaces 6 in S2 respectively, placing vertical convex columns 12 of the embedded steel plates 1 downwards, and enabling the upper end face of the embedded steel plate 1 and a pouring plane of the stair interface 6 to be in the same plane or to emerge out of the pouring plane; meanwhile, the lower end of a filler plug in an adjusting chute 11 of each embedded steel plate 1 extends out of a foam plate 8 outside the embedded steel plate, four bolts 3 with upward screws and nuts embedded in the foam plate 8 penetrate through the adjusting chute 11 of the embedded steel plate 1, and each bolt 3 corresponds to one side of the adjusting chute 11; s4, pouring stair interface concrete, and taking out each foam board 8 after the concrete of the stair interface 6 is finally set; s5, accurately releasing the positions of stair installation corner points on each embedded steel plate 1, drawing horizontal and longitudinal control lines on the embedded steel plates 1, aligning the inner sides of angle steels 51 of the positioning supports 5 with the horizontal and longitudinal control lines, and finally fixing angle plates 52 of the positioning supports 5 on the embedded steel plates 1 through movable press plates 2; s6, hoisting the prefabricated staircase 7, then stabilizing the prefabricated staircase 7 after being hoisted above the positioning support 5, then adjusting the position and the angle of the prefabricated staircase 7 to enable two opposite angles of the prefabricated staircase to correspond to the inner sides of the angle steels 51 of the positioning support 5, slowly lowering the prefabricated staircase 7 along the inner sides of the angle steels 51 after the prefabricated staircase 7 is placed on the embedded steel plate 1, and completing the positioning of the prefabricated staircase 7.
The movable pressing plates 2 are in a long strip shape, the two movable pressing plates 2 can slide along two opposite sides in the adjusting sliding grooves 11 and are positioned, a positioning sliding groove 21 is respectively arranged at two ends of each movable pressing plate 2 along the length direction of the movable pressing plate, and the positioning sliding grooves 21 are partially overlapped with the adjusting sliding grooves 11 on the embedded steel plates 1.
The bolts 3 positioned at two ends of each movable pressing plate 2 sequentially penetrate through the positioning sliding groove 21 and the adjusting sliding groove 11 and then are matched with a locking nut 4 to be fixed on the embedded steel plate 1; the bolt 3 can slide in the length direction of the adjusting chute 11. When the angle plate 52 is fixed by the movable pressing plate 2, the bolts 3 sequentially penetrate through the positioning sliding grooves 21 and the adjusting sliding grooves 11 and then are matched with the locking nuts 4, and the two ends of the two movable pressing plates 2 are fixed on the embedded steel plate 1, so that the angle plate 52 is compressed and fixed.
In order to prolong the service life of the positioning steel plate 1, a layer of antirust coating is arranged on the positioning steel plate 1. The embedded depth of the vertical convex column 12 of the positioning steel plate 1 is at least two thirds of the thickness of the stair interface 6. The vertical convex column 12 is a screw and is fixed below the embedded steel plate 1 through welding.
Before the concrete of the stair interface 6 is poured, a layer of release agent is smeared on the outer end face of the foam plate 8.
As shown in fig. 1, the angle plate 52 is L-shaped and is integrally formed with the angle iron 51, and the width of the angle plate 52 is larger than the width of the movable platen 2.
In order to facilitate the prefabricated staircase 7 to be lowered, the wall thickness of the two webs of the angle steel 51 is gradually reduced from bottom to top in the embodiment, and a slope surface is formed on the side of the angle steel 51 opposite to the corner plate.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and although the present invention has been described in detail by referring to the preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention can be made without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (10)
1. The precise positioning method for the prefabricated staircase is characterized by comprising the following steps of: s1, prefabricating the stair auxiliary positioning device in a factory; the auxiliary stair positioning device comprises an embedded steel plate (1) and a positioning support (5), wherein a plurality of vertical convex columns (12) are arranged at the lower end of the embedded steel plate (1), the positioning support (5) consists of an angle steel (51) and an angle plate (52) which is connected to the bottom of the angle steel (51) and arranged on the outer side of the angle steel (51), and the angle plate (52) is detachably fixed on the embedded steel plate (1); s2, roughly positioning the installation corner position of each prefabricated staircase before pouring each staircase interface (6), wherein the corner positions of two staircase interfaces (6) corresponding to the upper end and the lower end of each prefabricated staircase (7) are distributed diagonally; s3, respectively embedding an embedded steel plate (1) at the corner point positions of two stair interfaces (6) in S2, wherein vertical convex columns (12) of the embedded steel plates (1) are placed downwards, and the upper end surfaces of the embedded steel plates (1) and the pouring plane of the stair interfaces (6) are positioned on the same plane or emerge out of the pouring plane; s4, accurately releasing the positions of stair installation corner points on each embedded steel plate (1), drawing horizontal and longitudinal control lines on the embedded steel plates (1), aligning the inner sides of angle steels (51) of the positioning supports (5) with the horizontal and longitudinal control lines, and finally fixedly installing angle plates (52) of the positioning supports (5) on the embedded steel plates (1); s5, hoisting the prefabricated staircase (7), after hoisting the prefabricated staircase (7), hoisting the prefabricated staircase (7) above the positioning support (5) and then stabilizing the prefabricated staircase (7), adjusting the position and the angle of the prefabricated staircase (7) to enable two opposite angles of the prefabricated staircase to correspond to the angle steel (51) of the positioning support (5), and slowly lowering the prefabricated staircase (7) along the inner side of the angle steel (51) after the prefabricated staircase (7) is placed on the embedded steel plate (1) until the prefabricated staircase (7) is positioned.
2. The precast stair accurate positioning method according to claim 1, characterized in that each embedded steel plate (1) is provided with an adjusting chute (11), and the adjusting chute (11) is a rectangular through groove or is composed of four strip-shaped grooves distributed in a rectangular shape; the angle plate (52) of the positioning support (5) is pressed and fixed on the embedded steel plate (1) through two movable pressing plates (2), the two movable pressing plates (2) are arranged in a cross-shaped overlapping mode, and can slide along two opposite sides of the adjusting sliding groove (11) and are positioned.
3. The precast stair accurate positioning method according to claim 2, characterized in that the movable pressing plate (2) is in a long strip shape, a positioning sliding groove (21) is respectively arranged at two ends of each movable pressing plate (2) along the length direction of the movable pressing plate, and the positioning sliding groove (21) is partially overlapped with the adjusting sliding groove (11) on the embedded steel plate (1).
4. The method for accurately positioning the precast stair according to claim 3, wherein the bolts (3) positioned at two ends of each movable pressing plate (2) sequentially penetrate through the positioning sliding groove (21) and the adjusting sliding groove (11) through the two movable pressing plates (2) and then are matched with a locking nut (4) to be fixed on the embedded steel plate (1); the bolt (3) can slide in the length direction of the adjusting chute (11).
5. The method for accurately positioning the precast stair according to claim 4, wherein before pouring the concrete of the stair connector (6), when the embedded steel plate (1) is placed, a foam plate (8) with the lower end extending out of the embedded steel plate needs to be filled in an adjusting sliding groove (11) of the embedded steel plate (1), four bolts (3) with upward screws and nuts embedded in the foam plate (8) penetrate through the adjusting sliding groove (11) of the embedded steel plate (1), and each bolt (3) corresponds to one side of the adjusting sliding groove (11); after the concrete of the stair interface (6) is finally set, each foam plate (8) is taken out, each bolt (3) penetrates through the movable pressing plate (2) and then is matched with the locking nut (4), two ends of the two movable pressing plates (2) are fixed on the embedded steel plate (1), and the angle plate (52) is pressed and fixed.
6. The method for accurately positioning the prefabricated staircase according to the claims 1 to 5, characterized in that a layer of rust-proof coating is arranged on the positioning steel plate (1).
7. The method for accurately positioning the prefabricated staircase according to any one of the claims 1 to 5, wherein the embedded depth of the vertical convex columns (12) is at least two thirds of the thickness of the staircase interface (6).
8. The prefabricated staircase accurate positioning method as claimed in claim 7, wherein the vertical convex column (12) is a screw fixed under the embedded steel plate (1) by welding.
9. The prefabricated staircase accurate positioning method as claimed in claim 5, wherein a layer of release agent is coated on the outer end surface of the foam board (8) before the concrete of the staircase interface (6) is poured.
10. The prefabricated staircase accurate positioning method as claimed in any one of the claims 2 to 4, characterized in that the angle plate (52) is L-shaped and is integrally formed with the angle steel (51), and the width of the angle plate (52) is larger than that of the movable press plate (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011303224.1A CN112412067B (en) | 2020-11-19 | 2020-11-19 | Accurate positioning method for prefabricated staircase |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011303224.1A CN112412067B (en) | 2020-11-19 | 2020-11-19 | Accurate positioning method for prefabricated staircase |
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| CN112412067A true CN112412067A (en) | 2021-02-26 |
| CN112412067B CN112412067B (en) | 2022-03-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113774958A (en) * | 2021-09-09 | 2021-12-10 | 安徽数智建造研究院有限公司 | Assembled prefabricated component's centering device |
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| CN109025291A (en) * | 2018-07-25 | 2018-12-18 | 中国十七冶集团有限公司 | A kind of construction method of separate type precast stair |
| CN208310140U (en) * | 2018-05-17 | 2019-01-01 | 合肥建工集团有限公司 | A kind of precast stair accurate assembly accessory part |
| CN209083016U (en) * | 2018-08-06 | 2019-07-09 | 中铁十一局集团建筑安装工程有限公司 | A kind of prefabricated square column auxiliary locator |
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| DE20219820U1 (en) * | 2002-12-13 | 2003-03-13 | Legras, Achim, 72280 Dornstetten | Staircase assembly has an arm on which it rotates and a finger which is at a distance to the arm and a finger has a slip-free cover |
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| CN109025291A (en) * | 2018-07-25 | 2018-12-18 | 中国十七冶集团有限公司 | A kind of construction method of separate type precast stair |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113774958A (en) * | 2021-09-09 | 2021-12-10 | 安徽数智建造研究院有限公司 | Assembled prefabricated component's centering device |
| CN113774958B (en) * | 2021-09-09 | 2022-08-02 | 安徽数智建造研究院有限公司 | Assembled prefabricated component's centering device |
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| CN112412067B (en) | 2022-03-18 |
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