Prefabricated T-shaped stair

Abstract

The utility model provides a prefabricated T-shaped stair which comprises stair sections, a supporting structure, a beam supporting assembly and a middle platform plate, and the supporting structure comprises a first door frame type supporting structure arranged at the bottom of the connecting position of a second stair section and a third stair section. The second door frame type supporting structure is arranged at the bottom of the joint of the third stair section and the fourth stair section; the third door frame type supporting structure is arranged at the bottom of the tail end of the third stair section; the beam supporting assembly comprises a front ladder beam and a rear ladder beam which are arranged in parallel, each of the front ladder beam and the rear ladder beam comprises a flat beam surface section and oblique beam surface sections located on the two sides of the flat beam surface section, and the flat beam surface section and the two oblique beam surface sections are combined to form a trapezoidal structure; the first stair section and the middle platform plate are both arranged at the top of the flat beam surface section, and the second stair section is arranged at the top of the oblique beam surface section, so that the distance between the corner rest platform supporting column and the first door frame type supporting structure is prevented from being increased, the lower-layer space is effectively enlarged, and the passenger flow demand of a subway station is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of assembled stairs, and in particular relates to a prefabricated assembled T-shaped staircase. Background Art

[0002] At present, most of the T-shaped entrances and exits of subway stations adopt cast-in-place structures, which have complex formwork and scaffolding projects, need to be repeatedly disassembled and assembled, and seriously interfere with the construction of other components. These problems obviously delay the construction period. In addition, the structural strength and concrete appearance quality of the cast-in-place staircase structure cannot be effectively guaranteed, and later decoration is urgently needed, which is time-consuming and labor-intensive, and increases the project cost.

[0003] Compared with conventional cast-in-place stairs, prefabricated stairs can be prefabricated in factories and assembled after other on-site processes are completed, which can significantly improve construction efficiency, reduce construction waste generated by on-site construction and the environmental pollution caused, and has significant promotion and application value.

[0004] The prior patent application (CN219992934 U) discloses an assembled T-type staircase, including a staircase section, a supporting structure, a crossbeam and a middle platform plate. The supporting structure is a door frame type structure, which is a beam-column integrated structural member. A corner rest platform support column is formed under the door frame structure. The structure is relatively narrow, encroaching on the lower structure space, affecting the space utilization rate of the station. Utility Model Content

[0005] In order to solve the above defects in the prior art, the utility model proposes a prefabricated assembled T-shaped staircase to reduce the occupation of the lower structure space and improve the space utilization rate of the station. The solution is as follows:

[0006] A prefabricated T-shaped staircase, comprising a staircase section, a supporting structure, a beam supporting assembly and a middle platform plate, wherein the staircase section comprises a first staircase section and a second staircase section, a third staircase section and a fourth staircase section symmetrically arranged at the lower end of the first staircase section and on both sides of the middle platform plate;

[0007] The support structure is in the shape of a door frame, a beam-column integrated structure, and includes a first door frame support structure arranged at the bottom of the connection between the second staircase section and the third staircase section, a second door frame support structure arranged at the bottom of the connection between the third staircase section and the fourth staircase section, and a third door frame support structure arranged at the bottom of the end of the third staircase section;

[0008] The beam support assembly includes a front ladder beam and a rear ladder beam arranged in parallel, each of the front ladder beam and the rear ladder beam includes a flat beam surface section and inclined beam surface sections located on both sides of the flat beam surface section, the flat beam surface section and the two inclined beam surface sections are combined to form a trapezoidal structure; the first stair section and the middle platform plate are both arranged at the top of the flat beam surface section, and the second stair section is arranged at the top of the inclined beam surface section.

[0009] Further, the first door frame type support structure includes a precast beam with a corbel structure on both sides and a precast column supporting the precast beam; the precast beam is also provided with a middle beam with an equal spacing between the front ladder beam and the rear ladder beam for supporting the second staircase section; the precast beam is used to support the third staircase section, the front ladder beam and the rear ladder beam;

[0010] The ends of the inclined beam surface sections respectively extend a connecting section vertically downward and horizontally. The connecting section extending horizontally is fixedly connected to the top surface of the precast beam for supporting the second staircase section, and the connecting section extending vertically downward is fixedly connected to the side surface of the precast beam.

[0011] Furthermore, the first staircase section is configured as a prefabricated four-piece staircase; and the fourth staircase section is configured as a prefabricated double-piece staircase.

[0012] Furthermore, the third stair section and the fourth stair section are both configured as plate-type staircases; the second stair section is configured as a beam-type staircase, and the thickness of the second stair section is smaller than the thickness of the first stair section, the third stair section and the fourth stair section.

[0013] Furthermore, the second door frame type support structure and the third door frame type support structure are both π-shaped support structures, and the top surface is a plane.

[0014] Furthermore, the middle platform plate is configured as a rectangular prefabricated plate, which is connected to the reserved bolt holes in the front ladder beam and the rear ladder beam through the reserved bolt holes.

[0015] Furthermore, a beam ear extends horizontally outward from the connection between the flat beam surface section and the inclined beam surface section of the rear stair beam, and the sum of the lengths of the flat beam surface section and the beam ears on both sides is equal to the width of the first stair section.

[0016] Furthermore, an L-shaped groove is respectively provided at the bottom of the upper and lower ends of the third stair section, and the top and side surfaces of the L-shaped groove are respectively fixedly connected to the top and side surfaces corresponding to the second door frame type support structure and the third door frame type support structure; an L-shaped groove is also provided at the bottom of the upper end of the fourth stair section, and the top and side surfaces of the L-shaped groove are respectively fixedly connected to the top and side surfaces corresponding to the second door frame type support structure, and the bottom of the lower end of the fourth stair section is set as a plane, and the plane is fixedly connected to the top surface corresponding to the third door frame type support structure.

[0017] Furthermore, the surfaces of the first staircase section, the second staircase section, the third staircase section, the fourth staircase section and the middle platform plate are all covered with a layer of decoration-free coating.

[0018] Compared with the prior art, the advantages of the utility model are as follows:

[0019] The prefabricated assembled T-shaped staircase of the utility model avoids the need for supporting columns for the corner rest platform by adopting a structure connecting a ladder-shaped beam supporting assembly and a first door frame-type supporting structure. The distance between the first door frame-type supporting structures is increased, thereby effectively expanding the lower space, which is beneficial for taking into account the passenger flow needs of the subway station.

[0020] The prefabricated and assembled T-shaped staircase of the utility model realizes lightweight components by adopting a technical solution of splicing in which the first stair section is set as a prefabricated four-plate staircase and the fourth stair section is set as a prefabricated double-plate staircase; by adopting prefabricated beam-type stair slabs, the thickness of the stairs is reduced, the dead weight of the components is reduced, and it is more convenient to install, transport and produce, thereby ensuring the safety of each process in the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a prefabricated T-shaped staircase structure according to an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the positional relationship between a beam support assembly and a prefabricated π-shaped support structure according to an embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the partitioning of a beam support assembly according to an embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of reserved bolt holes for a beam support assembly according to an embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of a first door frame type support structure of an embodiment of the utility model;

[0026] Figure 6 It is a schematic diagram of the positions of the beam support assembly and the first door frame type support structure according to an embodiment of the utility model;

[0027] Figure 7 This is a position relationship diagram of a prefabricated beam-type staircase and a first door frame-type supporting structure in one embodiment of the utility model;

[0028] Figure 8 This is a position relationship diagram of a prefabricated beam staircase, a middle platform plate and a rear stair beam in an embodiment of the utility model;

[0029] Fig. 9 This is a schematic diagram of the installation position of a prefabricated four-piece staircase according to an embodiment of the utility model;

[0030] Fig.10 It is a schematic diagram of the position relationship between a part of the prefabricated four-piece staircase, a prefabricated beam-type staircase and a beam support assembly in one embodiment of the utility model;

[0031] Fig.11This is a schematic diagram of the positional relationship between a prefabricated four-piece staircase, a prefabricated beam-type staircase and a beam support assembly according to an embodiment of the utility model;

[0032] Fig.12 This is a schematic diagram of the position relationship between the prefabricated four-piece staircase, the middle platform plate and the beam support assembly in one embodiment of the utility model;

[0033] Fig.13 A schematic diagram of a prefabricated staircase according to an embodiment of the utility model;

[0034] Fig.14 This is a schematic diagram of bolt holes reserved under a prefabricated staircase according to an embodiment of the utility model;

[0035] Fig.15 It is a partial schematic diagram of a prefabricated double staircase and an L-shaped groove in one embodiment of the utility model;

[0036] Fig.16 This is a schematic diagram of a prefabricated four-piece staircase according to an embodiment of the utility model;

[0037] Fig.17 This is a schematic diagram of a prefabricated beam staircase according to an embodiment of the utility model;

[0038] Fig.18 This is a schematic diagram of a middle platform plate of an embodiment of the utility model;

[0039] Fig.19 This is a schematic diagram of a second door frame type support structure of an embodiment of the utility model;

[0040] In the above figures: 11, prefabricated four-piece staircase; 111, hanging point; 112, reserved tensioning hole; 113, grouting hole; 115, reserved bolt hole; 12, prefabricated double-piece staircase; 122, hanging point; 123, reserved tensioning hole; 124, grouting hole; 125, 126, reserved bolt holes; 2, prefabricated beam staircase; 21, reserved bolt hole; 22, hanging point; 23, reserved bolt hole; 3, prefabricated staircase; 31, L-shaped groove; 33, 35, reserved bolt hole; 34, hanging point; 36, 38, reserved bolt hole; 37, grouting hole; 4, beam support assembly; 41, front staircase beam ; 42. rear ladder beam; 421. beam ear; 4211. reserved bolt holes; 422. inclined beam surface section; 423. flat beam surface section; 43, 44, 45, 46. reserved bolt holes; 5. supporting structure; 51. first door frame type supporting structure; 511. precast beam; 5111, 5112, 5121. reserved bolt holes; 5113. reserved bolt holes; 512. middle beam; 513. precast column; 52. second door frame type supporting structure; 521, 522, 523. reserved bolt holes; 53. third door frame type supporting structure; 6. middle platform plate; 61. reserved bolt holes. DETAILED DESCRIPTION

[0041] To facilitate those skilled in the art to understand the present invention, specific implementations of the present invention are described below with reference to the accompanying drawings.

[0042] like Figures 1 to 19 As shown, the utility model proposes a prefabricated assembled T-shaped staircase, including a staircase section, a support structure 5, a beam support assembly and a middle platform plate. The staircase section includes a first staircase section and a second staircase section, a third staircase section and a fourth staircase section symmetrically arranged at the lower end of the first staircase section and on both sides of the middle platform plate 6. The support structure 5 is a door frame-shaped, beam-column integrated structure, including a first door frame-shaped support structure 51 arranged at the bottom of the connection between the second staircase section and the third staircase section, a second door frame-shaped support structure 52 arranged at the bottom of the connection between the third staircase section and the fourth staircase section, and a third door frame-shaped support structure 53 arranged at the bottom of the end of the third staircase section. The beam support assembly 4 includes a front ladder beam 41 and a rear ladder beam 42 arranged in parallel, and the front ladder beam 41 and the rear ladder beam 42 each include a flat beam surface section 423 and an inclined beam surface section 422 located on both sides of the flat beam surface section 423, and the flat beam surface section 423 and the two inclined beam surface sections 422 are combined to form a trapezoidal structure. The first staircase section and the middle platform plate 6 are both arranged at the top of the flat beam surface section 423, and the second staircase section is arranged at the top of the inclined beam surface section 422. The front staircase beam 41 mainly bears the force of the prefabricated beam staircase 2 and the middle platform plate 6, and the rear staircase beam 42 mainly bears the force of the prefabricated four-piece staircase 11, the middle platform plate 6 and the prefabricated beam staircase 2.

[0043] Specifically, the first staircase section is a prefabricated four-piece staircase 11, the second staircase section is a prefabricated beam-type staircase 2; the third staircase section is a prefabricated staircase 3, and the fourth staircase section is a prefabricated double-piece staircase 12.

[0044] The prefabricated four-piece staircase 11 is hoisted and installed through the hoisting point 111, and the tensioning holes 112 are reserved for tensioning to splice the four staircases. After hoisting, grouting is performed through the grouting holes 113.

[0045] The prefabricated beam type staircase 2 has reserved bolt holes 21 and 23 for connection with the reserved bolt holes 43, 44 and 45 in the beam support assembly 4, respectively, and a reserved hanging point 22 for easy installation.

[0046] Specifically, a beam ear 421 extends horizontally outward from the connection between the flat beam surface section 423 and the inclined beam surface section 422 of the rear ladder beam 42 , and the sum of the lengths of the flat beam surface section 423 and the beam ears 421 on both sides is equal to the width of the prefabricated four-piece staircase 11 .

[0047] In the rear stair beam 42 , the beam ear 421 is used to support the prefabricated four-piece staircase 11 , the inclined beam surface section 422 is used to support the prefabricated beam-type staircase 2 , and the flat beam surface section 423 is used to support the middle platform plate 6 and the prefabricated beam-type staircase plate 2 .

[0048] Among them, the four-piece prefabricated staircase 11 is bolted to the reserved bolt holes 4211 of the rear ladder beam through the reserved bolt holes 115.

[0049] The supporting structures 5 are all portal column structures, and the prefabricated beams and columns are integrally formed, including a first door frame type supporting structure 51 for supporting the prefabricated beam-type stairs 2, the prefabricated stairs 3 and the beam support assembly 4, a second door frame type supporting structure 52 for supporting the prefabricated stairs 3 and the prefabricated double stairs 12, and a third door frame type supporting structure 53 for the prefabricated double stairs 12.

[0050] The first door frame type support structure 51 includes a precast beam 511 with a corbel structure on both sides and a precast column 513 supporting the precast beam 511. The precast beam 511 is also provided with a middle beam 512 with an equal spacing between the front ladder beam 41 and the rear ladder beam 42 to support the precast beam type staircase 2. The precast beam 511 is used to support the precast staircase 3, the front ladder beam 41 and the rear ladder beam 42.

[0051] The ends of the inclined beam surface section 422 extend a connecting section vertically downward and horizontally respectively. The horizontally extending connecting section is fixedly connected to the top surface of the precast beam 511 for supporting the precast beam type staircase 2, and the vertically extending connecting section is fixedly connected to the side of the precast beam 511.

[0052] Specifically, the reserved bolt hole 5112 in the prefabricated beam 511, the reserved bolt hole 36 in the prefabricated staircase 3 are bolted to the reserved bolt hole 46 in the beam support assembly 4. The reserved bolt hole 5113 is connected to the reserved bolt hole 45 in the beam support assembly 4 and the reserved bolt hole 23 in the prefabricated beam staircase 2.

[0053] Furthermore, the second door frame type support structure 52 and the third door frame type support structure 53 are both π-shaped support structures, and the top surfaces are flat.

[0054] The middle platform plate 6 is a rectangular prefabricated plate, and the reserved bolt holes 61 are connected with the reserved bolt holes 44 in the beam support assembly 4 .

[0055] The third staircase section, i.e., the upper and lower bottoms of the prefabricated staircase 3 are respectively provided with L-shaped grooves 31, and the top and side surfaces of the L-shaped grooves 31 are respectively fixedly connected to the top and side surfaces corresponding to the second door frame type support structure 52 and the third door frame type support structure 53; the fourth staircase section, i.e., the upper bottom of the prefabricated double staircase 12 is also provided with L-shaped grooves 31, and the top and side surfaces of the L-shaped grooves 31 are respectively fixedly connected to the top and side surfaces corresponding to the second door frame type support structure 52, and the lower bottom of the prefabricated double staircase 12 is set as a plane, and the plane is fixedly connected to the top surface corresponding to the third door frame type support structure 53. Specifically, the above-mentioned fixed connection method is bolt connection.

[0056] The prefabricated staircase 3 has a reserved hanging point 34 for easy hanging and a reserved grouting hole 37. The reserved bolt holes 33 and 35 are respectively connected to the reserved bolt holes 5111 of the first door frame type support structure and the reserved bolt holes 521 of the second door frame type support structure 52. The reserved bolt hole 36 is connected to the reserved bolt hole 5112 in the first door frame type support structure 51. The reserved bolt hole 38 is connected to the reserved bolt hole 523 of the second door frame type support structure 52.

[0057] Only the upper end of the prefabricated double staircase 12 is provided with an L-shaped groove 31, and bolt holes 125 and 126 are reserved for connection with the third door frame type support structure 53. A hanging point 122 is reserved in the prefabricated double staircase 12 for hoisting construction, and a tensioning hole 123 is reserved for tensioning to splice the two staircases, and grouting is performed through the grouting hole 124 after hoisting.

[0058] Furthermore, the prefabricated staircase 3 and the prefabricated double staircase 12 are preferably plate-type staircases. If a beam-type staircase is used, the longitudinal beams cannot be aligned with the upper longitudinal beams and the force cannot be effectively transmitted. Moreover, due to the design of the beam support assembly 4, the thickness of the prefabricated beam-type staircase 2 is smaller than that of the prefabricated four-piece staircase 11, the prefabricated staircase 3, and the prefabricated double staircase 12.

[0059] Furthermore, the prefabricated four-piece staircase 11, the prefabricated beam-type staircase 2, the prefabricated staircase 3, the prefabricated double-piece staircase 12 in the prefabricated assembled T-type staircase of the utility model, the beam support assembly 4 supporting the prefabricated four-piece staircase 11, the middle platform plate 6, and the prefabricated staircase 3, and the supporting structure 5 arranged longitudinally along the assembled T-type staircase are all provided with reserved bolt holes, and bolt connections are adopted between the components; preferably, the prefabricated blocks are connected with M24 bolts, and the bolt sleeves are embedded in the hanging points.

[0060] The prefabricated assembled T-shaped staircase of the utility model is a decoration-free staircase, and the surfaces of the first staircase section, the second staircase section, the third staircase section, the fourth staircase section, and the middle platform plate are all covered with a layer of decoration-free coating. Specifically, before covering the coating, the staircase surface is polished and leveled with a grinding and polishing tool, and the coating is evenly covered on the staircase surface with a concrete sealing and curing agent, and then infiltrated and cured. After repeated operations, a polishing glaze is applied, and the polishing is performed, so that the treated concrete surface has a marble luster, and the luster gradually brightens with the increase of service years.

[0061] The above-described implementation methods of the utility model do not constitute a limitation on the protection scope of the utility model. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the claims of the utility model.

Claims

1. A prefabricated T-shaped staircase, comprising a staircase section, a support structure (5), a beam support assembly (4) and a middle platform plate (6), characterized in that: The staircase comprises a first staircase and a second staircase, a third staircase and a fourth staircase symmetrically arranged at the lower end of the first staircase and on both sides of the middle platform plate; The support structure (5) is in the shape of a door frame, a beam-column integrated structure, and comprises a first door frame support structure (51) arranged at the bottom of the connection between the second staircase section and the third staircase section, a second door frame support structure (52) arranged at the bottom of the connection between the third staircase section and the fourth staircase section, and a third door frame support structure (53) arranged at the bottom of the end of the third staircase section; The beam support assembly (4) comprises a front ladder beam (41) and a rear ladder beam (42) arranged in parallel, wherein the front ladder beam (41) and the rear ladder beam (42) each comprise a flat beam surface section (423) and inclined beam surface sections (422) located at both ends of the flat beam surface section (423), wherein the flat beam surface section (423) and the two inclined beam surface sections (422) are combined to form a trapezoidal structure; the first stair section and the middle platform plate (6) are both arranged at the top of the flat beam surface section (423), and the second stair section is arranged at the top of the inclined beam surface section (422).

2. The prefabricated T-shaped staircase according to claim 1, characterized in that: The first door frame type support structure (51) comprises a precast beam (511) with a corbel structure on both sides and a precast column (513) supporting the precast beam (511); a middle beam (512) equidistant from the front ladder beam (41) and the rear ladder beam (42) is also provided on the upper part of the precast beam (511) for supporting the second staircase section; the precast beam (511) is used to support the third staircase section, the front ladder beam (41) and the rear ladder beam (42); The ends of the inclined beam surface section (422) extend a connecting section vertically downward and horizontally respectively. The horizontally extending connecting section is fixedly connected to the top surface of the precast beam (511) for supporting the second staircase section. The vertically extending connecting section is fixedly connected to the side surface of the precast beam (511).

3. The prefabricated T-shaped staircase according to claim 1, characterized in that: The first staircase section is configured as a prefabricated four-piece staircase; and the fourth staircase section is configured as a prefabricated two-piece staircase.

4. The prefabricated T-shaped staircase according to claim 1, characterized in that: The third staircase section and the fourth staircase section are both configured as plate-type staircases; the second staircase section is configured as a beam-type staircase, and the thickness of the second staircase section is smaller than that of the first staircase section, the third staircase section and the fourth staircase section.

5. The prefabricated T-shaped staircase according to claim 1, characterized in that: The second door frame type support structure (52) and the third door frame type support structure (53) are both π-shaped support structures, and the top surfaces are flat.

6. The prefabricated T-shaped staircase according to claim 1, characterized in that: The middle platform plate (6) is configured as a rectangular prefabricated plate and is connected to the reserved bolt holes in the front ladder beam (41) and the rear ladder beam (42) through the reserved bolt holes.

7. The prefabricated T-shaped staircase according to claim 1, characterized in that: A beam lug (421) extends horizontally outward from the connection between the flat beam surface section (423) and the inclined beam surface section (422) of the rear stair beam (42), and the sum of the lengths of the flat beam surface section (423) and the beam lugs (421) located on both sides is equal to the width of the first stair section.

8. The prefabricated T-shaped staircase according to claim 1, characterized in that: The upper and lower bottom ends of the third stair section are respectively provided with L-shaped grooves (31), and the top and side surfaces of the L-shaped grooves (31) are respectively fixedly connected to the top and side surfaces corresponding to the second door frame type support structure (52) and the third door frame type support structure (53); the upper bottom end of the fourth stair section is also provided with an L-shaped groove (31), and the top and side surfaces of the L-shaped grooves (31) are respectively fixedly connected to the top and side surfaces corresponding to the second door frame type support structure (52); the lower bottom end of the fourth stair section is set as a plane, and the plane is fixedly connected to the top surface corresponding to the third door frame type support structure (53).

9. The prefabricated T-shaped staircase according to claim 1, characterized in that: The surfaces of the first staircase section, the second staircase section, the third staircase section, the fourth staircase section and the middle platform plate are all covered with a layer of decoration-free coating.

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