CN209891597U - Cast-in-situ plate type stair with sliding support at high-end ladder beam supporting position - Google Patents
Cast-in-situ plate type stair with sliding support at high-end ladder beam supporting position Download PDFInfo
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- CN209891597U CN209891597U CN201920356119.0U CN201920356119U CN209891597U CN 209891597 U CN209891597 U CN 209891597U CN 201920356119 U CN201920356119 U CN 201920356119U CN 209891597 U CN209891597 U CN 209891597U
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Abstract
The utility model provides a cast-in-situ plate type stair with a sliding support at the supporting position of a high-end ladder beam, and a low-end ladder beam and a stair body are integrally cast; the supporting position of the high-end ladder beam is provided with an outward-projecting lug, the outward-projecting lug is bent by a stress rib to form a frame-shaped main body, a frame rib is arranged in the frame-shaped main body, and the outward-projecting lug and the high-end ladder beam are integrally cast and molded; a sliding support is arranged on a concrete horizontal plane at the top end of the overhanging lug, a flat section at the upper end of the ladder section is placed above the overhanging lug, and the flat section at the upper end of the ladder section is fixedly connected with the sliding support on the surface of the overhanging lug in a weak connection mode; an expansion joint filled with polystyrene boards is reserved between the flat section at the upper end of the ladder board and the high-end ladder beam. The utility model discloses reduced stair bench span, the cost is reduced for the construction progress has shortened construction cycle, and stair construction joint sets up more rationally, and the building surface course produces small displacement under the effect of earthquake power, and is difficult for destroying impaired.
Description
Technical Field
The utility model relates to a building engineering stair technical field specifically, relates to high-end ladder beam supporting department establishes sliding support's cast-in-place board formula stair.
Background
In a multi-storey and high-rise building, a stair is used as a connecting channel for an upper storey and a lower storey; is an indispensable building functional component for personnel safety and fire-fighting evacuation, and is closely related to the life and property safety of the masses. The plate type staircase is widely used in the industry because of clear stress of the structure, convenient pouring and beautiful and elegant appearance. The national standard 'building earthquake-resistant design code' 2016 edition 6.1.15 clearly requires that cast-in-place reinforced concrete stairs should be adopted for the stairs, and for a frame structure, when the stairs and a main structure are integrally cast, the influence of the stair members on the earthquake action and the earthquake effect should be taken into account, and effective measures should be taken to reduce the influence of the stair members on the main structure. In the national building standard design drawing set 16G101-2 'concrete structure construction drawing plane integral representation method drawing rule and structure detailed drawing', the low-end ladder beam supporting part is made into ATa and ATb type stairs of a sliding support, so that seismic force is released, and the influence of the rigidity of the stairs in a structure main body is weakened; however, the arrangement of the sliding support at the support of the low-end ladder beam has limitations, limits the arrangement scheme of the building stairs, and cannot reasonably arrange the plane position of the stair sections of the stairs; when in site construction, the sliding support can be installed only after concrete components at the supporting position of the lower end ladder beam are poured and the concrete is condensed to reach the allowable strength, and then the stair is poured, so that the construction period is prolonged, and the progress of the construction period is influenced.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims at providing a cast-in-place plate type stair with a sliding support at the high-end ladder beam supporting position, the utility model arranges an outward-picking lug at the high-end ladder beam supporting position of the stair, and arranges the sliding support on the outward-picking lug of the high-end ladder beam, thereby reducing the span of the stair sections and lowering the cost; the lower end ladder beam at the lower end of the stair is integrally cast with the stair body, so that the limitation of stair arrangement in building major is solved, the construction progress is effectively accelerated, and the construction period is shortened; meanwhile, the stair construction joint is more reasonable to arrange during construction; the building surface layer generates micro displacement under the action of earthquake force and is not easy to damage.
According to one aspect of the utility model, a cast-in-place plate stair with a sliding support at the supporting position of a high-end ladder beam is provided, the cast-in-place plate stair comprises a stair body (2), a low-end ladder beam (1) is arranged at the lower end of the stair body (2), a high-end ladder beam (4) is arranged at the upper end of the stair body, and the low-end ladder beam (1) and the stair body (2) are integrally cast; the supporting position of the high-end ladder beam (4) is provided with an outward-projecting lug (5), the outward-projecting lug (5) is bent by a stress rib (10) to form a frame-shaped main body, a erecting rib (9) is arranged in the frame-shaped main body, and the outward-projecting lug (5) and the high-end ladder beam (4) are integrally cast and molded; a sliding support (6) is arranged on the concrete horizontal plane at the top end of the cantilever lug (5), a flat section (3) at the upper end of the ladder section is placed above the cantilever lug (5), and the flat section (3) at the upper end of the ladder section is fixedly connected with the sliding support (6) on the surface of the cantilever lug (5) in a weak connection mode; an expansion joint is reserved between the flat section (3) at the upper end of the ladder plate and the high-end ladder beam (4), and the expansion joint is filled with a polystyrene board (7).
Preferably, the stress rib (10) is fixed with a ladder beam longitudinal rib (8) hoop of a high-end ladder beam (4) at the right lower top corner of the frame-shaped main body in a closing mode, and 5 erection ribs (9) are arranged and are respectively arranged at the other 3 top corners of the frame-shaped main body and the middle positions of the top and the bottom of the frame-shaped main body. Because of stress rib (10) and be located the ladder roof beam vertical bar (8) hoop closure of frame-shaped main part right side lower top angle department fixed, so can set up a frame vertical bar (9) less, not only set up the ear of choosing outward and become simple and convenient, reduced the cost moreover.
Preferably, the stress bar (10) is made of three-grade steel with the diameter of 14@100, and the erection bar (9) is made of three-grade steel with the diameter of 16.
Preferably, the height of the cantilever ear (5) is 220mm, and the cantilever length is 240 mm.
Preferably, the height of the polystyrene board (7) is equal to: the sum of the height of the flat section (3) at the upper end of the stair section and the thickness of the building surface layer of the stair body (2).
Preferably, the width of the expansion joint is 52-80 mm.
Preferably, the width of the expansion joint is 60mm, and the effect is optimal.
Preferably, the weak connection mode is as follows: the joint of the flat section (3) at the upper end of the ladder board and the sliding support (6) is provided with a polytetrafluoroethylene board with the thickness of 5mm and is connected and fixed by adopting an adhesive.
Preferably, the weak connection mode is as follows: 2 layers of plastic sheets with the thickness of more than or equal to 0.5mm are arranged at the joint of the flat section (3) at the upper end of the ladder plate and the sliding support (6) and are fixedly connected by screws.
Preferably, the weak connection mode is as follows: the joint of the flat section (3) at the upper end of the ladder plate and the sliding support (6) is provided with 2 layers of steel plates which are fixedly connected by rivets, and graphite powder with the thickness of 0.1mm is arranged between the steel plates.
In order to achieve the above object, the utility model also provides a construction process of high-end ladder beam bearing department establishes sliding support's cast-in-place board stair, including following step:
firstly, a low-end ladder beam (1) at the lower end of a stair body (2) and the stair body (2) are integrally cast and formed, and a construction joint is reserved at one third of the lower end of a stair section;
step two, arranging an outer cantilever lug (5) at the supporting position of the high-end ladder beam (4), wherein a stress rib (10) of the outer cantilever lug (5) and a ladder beam longitudinal rib (8) hoop of the high-end ladder beam (4) are closed and fixed to form a frame-shaped main body of the outer cantilever lug (5), a standing rib (9) is arranged in the frame-shaped main body of the outer cantilever lug, and the outer cantilever lug (5) and the high-end ladder beam (4) are integrally cast and formed;
thirdly, arranging the sliding support (6) on the concrete horizontal plane of the cantilever lug (5);
step four, pouring and tamping the stair tread, placing the flat section (3) at the upper end of the stair tread at the upper end of the stair body (2) on the outward-protruding lugs (5) and fixedly connecting the flat section through a weak connection mode, reserving an expansion joint between the high-end ladder beam (4) and the flat section (3) at the upper end of the stair tread, and filling a polystyrene board in the expansion joint.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the cast-in-place plate type stair with the sliding support arranged at the high-end ladder beam supporting position does not need to wait for the sliding support and the stair arranged after the low-end ladder beam supporting position reaches the allowable strength, thereby effectively accelerating the construction progress and shortening the construction period;
(2) the cast-in-place plate type stair with the sliding support arranged at the high-end ladder beam supporting position does not need to consider the limitation brought by arranging the sliding support at the low-end ladder beam supporting position of the stair on the floor surface, thereby solving the limitation existing when the stair stepping position is arranged on the floor surface in the building specialty;
(3) the utility model relates to a cast-in-place board stair with sliding supports at the supporting position of a high-end stair beam, a low-end stair beam at the lower end of the stair is integrally cast with a stair main body, and a construction joint is reserved at one third of the lower end of a stair section, the reserved position of the construction joint is more reasonable, so that the influence on the self strength of the stair section due to construction is reduced to the minimum, and the stress of the stair section is more consistent with the theoretical design;
(4) the cast-in-place plate type stair with the sliding support at the high-end ladder beam supporting position, provided with the outward-protruding lugs, reduces the span of the stair step section, so that the thickness and the reinforcement of the stair step plate are correspondingly reduced, the cost is more economic, and the control of deflection and crack is facilitated;
(5) the utility model relates to a cast-in-place plate stair with a sliding support at the high-end ladder beam support, when the stair generates small displacement under the action of earthquake force, the building surface layer is not easy to be damaged due to the influence of the earthquake force because of the elastic extrusion of a polystyrene board;
(6) the cast-in-situ plate type staircase provided with the sliding support at the high-end ladder beam supporting position has simple structure, ingenious design and obvious effect;
(7) the cast-in-place plate type stair with the sliding support at the high-end ladder beam supporting position is simple and convenient in construction method, easy for engineering application and strong in practicability;
(8) the utility model relates to a sliding support's cast-in-place board formula stair are established to high-end ladder roof beam supporting department, stable in structure is firm, and the quality is guaranteed, and is with low costs, is fit for promoting on a large scale.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural view of a cast-in-situ slab stair with a sliding support at a high-end ladder beam support;
fig. 2 is a partial structure enlarged view of a cast-in-situ plate type stair with a sliding support seat at a high-end ladder beam supporting position.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
Examples
The embodiment provides a cast-in-situ slab stair with a sliding support at the supporting position of a high-end ladder beam, and the structure of the cast-in-situ slab stair is shown in the attached drawings 1 and 2 in detail: the stair comprises a stair body 2, wherein a low-end ladder beam 1 is arranged at the lower end of the stair body 2, a high-end ladder beam 4 is arranged at the upper end of the stair body 2, and the low-end ladder beam 1 and the stair body 2 are integrally cast; the supporting position of the high-end ladder beam 4 is provided with an outward-projecting lug 5, the outward-projecting lug 5 is bent by a stress rib 10 to form a frame-shaped main body, a frame-shaped main body is internally provided with a vertical rib 9, and the outward-projecting lug 5 and the high-end ladder beam 4 are integrally cast and molded; a sliding support 6 is arranged on the concrete horizontal plane at the top end of the overhanging lug 5, the flat section 3 at the upper end of the ladder section is placed above the overhanging lug 5, and the flat section 3 at the upper end of the ladder section is fixedly connected with the sliding support 6 on the surface of the overhanging lug 5 in a weak connection mode; an expansion joint is reserved between the flat section 3 at the upper end of the ladder plate and the high-end ladder beam 4, and a polystyrene board 7 is filled in the expansion joint.
Furthermore, the stress rib 10 is fixed with the ladder beam longitudinal rib 8 hoop of the high-end ladder beam 4 positioned at the right lower top corner of the frame-shaped main body in a closed manner, and the frame vertical ribs 9 are provided with 5 ribs which are respectively arranged at other 3 top corners of the frame-shaped main body and the middle positions of the top and the bottom of the frame-shaped main body. Because the stress rib 10 is fixed with the ladder beam longitudinal rib 8 hoop closure that is located frame-shaped main part right side lower vertex angle department, so can set up a frame vertical rib 9 less, not only set up the ear of choosing outward and become simple and convenient, reduced the cost moreover.
Further, the stress bar 10 is made of three-grade steel with the diameter of 14@100, and the erection bars 9 are made of three-grade steel with the diameter of 16.
Furthermore, the height of the cantilever ear 5 is 220mm, and the cantilever length is 240 mm.
Further, the height of the polystyrene board 7 is equal to: the sum of the height of the flat section 3 at the upper end of the stair section and the thickness of the building surface layer of the stair body 2.
Furthermore, the width of the expansion joint is 52-80 mm.
Furthermore, the width of the expansion joint is 60mm, and the effect is optimal.
Further, the weak connection mode is as follows: the joint of the flat section 3 at the upper end of the ladder board and the sliding support 6 is provided with a polytetrafluoroethylene board with the thickness of 5mm and is connected and fixed by adopting an adhesive.
Further, the weak connection mode is as follows: the joint of the flat section 3 at the upper end of the step plate and the sliding support 6 is provided with 2 layers of plastic sheets with the thickness of more than or equal to 0.5mm and is fixed by adopting screws.
Further, the weak connection mode is as follows: the junction of flat section 3 in the step upper end and sliding support 6 sets up 2 layers of steel sheet and adopts rivet connection fixed, and is equipped with the graphite powder of 0.1mm thick between the steel sheet.
In order to achieve the above object, this embodiment further provides a construction process of a cast-in-place slab stair with a sliding support at a high-end ladder beam support, including the following steps:
firstly, a low-end ladder beam 1 at the lower end of a stair body 2 and the stair body 2 are integrally cast, and a construction joint is reserved at one third of the lower end of a stair section;
step two, arranging an outward-projecting lug 5 at the supporting position of the high-end ladder beam 4, wherein a stress rib 10 of the outward-projecting lug 5 and a ladder beam longitudinal rib 8 hoop of the high-end ladder beam 4 are fixedly closed to form a frame-shaped main body of the outward-projecting lug 5, a standing rib 9 is arranged in the frame-shaped main body, and the outward-projecting lug 5 and the high-end ladder beam 4 are integrally cast and molded;
thirdly, arranging the sliding support 6 on the concrete level of the cantilever lugs 5;
step four, pouring and tamping the stair tread, placing the flat section 3 at the upper end of the stair body 2 on the outward-protruding lug 5 and fixedly connecting the flat section by a weak connection mode, reserving an expansion joint between the high-end ladder beam 4 and the flat section 3 at the upper end of the stair tread, and filling a polystyrene board in the expansion joint.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (10)
1. The cast-in-place plate type stair with the sliding support at the supporting position of the high-end ladder beam comprises a stair body (2), wherein the lower end of the stair body (2) is provided with a low-end ladder beam (1), and the upper end of the stair body is provided with a high-end ladder beam (4), and is characterized in that the low-end ladder beam (1) and the stair body (2) are integrally cast; the supporting position of the high-end ladder beam (4) is provided with an outward-projecting lug (5), the outward-projecting lug (5) is bent by a stress rib (10) to form a frame-shaped main body, a erecting rib (9) is arranged in the frame-shaped main body, and the outward-projecting lug (5) and the high-end ladder beam (4) are integrally cast and molded; a sliding support (6) is arranged on the concrete horizontal plane at the top end of the cantilever lug (5), a flat section (3) at the upper end of the ladder section is placed above the cantilever lug (5), and the flat section (3) at the upper end of the ladder section is fixedly connected with the sliding support (6) on the surface of the cantilever lug (5) in a weak connection mode; an expansion joint is reserved between the flat section (3) at the upper end of the ladder section and the high-end ladder beam (4), and a polystyrene board (7) is filled in the expansion joint.
2. The cast-in-place slab stair with the sliding support at the high-end ladder beam support according to claim 1 is characterized in that the stress ribs (10) are fixed with the ladder beam longitudinal ribs (8) of the high-end ladder beam (4) positioned at the right lower top corner of the frame-shaped body in a closed mode, and 5 erection ribs (9) are respectively arranged at the other 3 top corners of the frame-shaped body and at the middle positions of the top and the bottom of the frame-shaped body.
3. Cast-in-place stair with sliding supports at the high-end ladder beam support according to claim 1 or 2, characterized in that the stress bars (10) are made of three-grade steel with a diameter of 14@100, and the erection bars (9) are made of three-grade steel with a diameter of 16.
4. The cast-in-situ stair with the sliding support at the high-end ladder beam support according to claim 1, wherein the height of the overhanging lugs (5) is 220mm, and the length of the overhanging lugs is 240 mm.
5. Cast-in-place slab stairway with sliding supports at the high end sill support according to claim 1, characterized in that the height of the polystyrene board (7) is equal to: the sum of the height of the flat section (3) at the upper end of the stair section and the thickness of the building surface layer of the stair body (2).
6. The cast-in-place slab stair with the sliding support at the high-end ladder beam support according to claim 1, wherein the width of the expansion joint is 52-80 mm.
7. The cast-in-place slab stair with the sliding support at the high-end ladder beam support according to claim 1 or 6, wherein the width of the expansion joint is 60 mm.
8. The cast-in-place slab stair with the sliding supports at the high-end ladder beam support positions according to claim 1, wherein the weak connection mode is as follows: the joint of the flat section (3) at the upper end of the ladder section and the sliding support (6) is provided with a polytetrafluoroethylene plate with the thickness of 5mm and is connected and fixed by adopting an adhesive.
9. The cast-in-place slab stair with the sliding supports at the high-end ladder beam support positions according to claim 1, wherein the weak connection mode is as follows: 2 layers of plastic sheets with the thickness of more than or equal to 0.5mm are arranged at the joint of the flat section (3) at the upper end of the ladder section and the sliding support (6) and are connected and fixed by screws.
10. The cast-in-place slab stair with the sliding supports at the high-end ladder beam support positions according to claim 1, wherein the weak connection mode is as follows: the joint of the bench section upper end flat section (3) and the sliding support (6) is provided with 2 layers of steel plates and is fixed by adopting rivets, and graphite powder with the thickness of 0.1mm is arranged between the steel plates.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920356119.0U CN209891597U (en) | 2019-03-20 | 2019-03-20 | Cast-in-situ plate type stair with sliding support at high-end ladder beam supporting position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920356119.0U CN209891597U (en) | 2019-03-20 | 2019-03-20 | Cast-in-situ plate type stair with sliding support at high-end ladder beam supporting position |
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| CN209891597U true CN209891597U (en) | 2020-01-03 |
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| CN201920356119.0U Active CN209891597U (en) | 2019-03-20 | 2019-03-20 | Cast-in-situ plate type stair with sliding support at high-end ladder beam supporting position |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853880A (en) * | 2019-03-20 | 2019-06-07 | 上海众鑫建筑设计研究院有限公司 | The cast-in-place cranked slab stairs and its construction technology of sliding support are set at high-end ladder beam support |
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2019
- 2019-03-20 CN CN201920356119.0U patent/CN209891597U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853880A (en) * | 2019-03-20 | 2019-06-07 | 上海众鑫建筑设计研究院有限公司 | The cast-in-place cranked slab stairs and its construction technology of sliding support are set at high-end ladder beam support |
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