Decoration-free subway entrance and exit assembly type stair

Abstract

The utility model relates to the technical field of metro construction, in particular to a decoration-free metro entrance and exit assembly type stair. Comprising a plurality of prefabricated stair plates connected in sequence. Every two adjacent prefabricated stair plates are fixedly connected through a stair plate connecting joint. A groove is formed between the ends of every two adjacent prefabricated stair plates, and the blind sidewalk bricks are arranged in the grooves. The prefabricated stair plates and the blind sidewalk bricks form a stair surface. Installation is fast and convenient, and construction efficiency and construction quality of the subway entrance and exit stairs are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of subway construction, in particular to a decoration-free assembled staircase for subway entrances and exits. Background Art

[0002] The existing subway entrance and exit construction methods are complicated: the concealed excavation entrance and exit cannot reserve openings at the top of the entrance and exit; there are many horizontal supports above the top plate of the open-cut entrance and exit, and some components are blocked by the horizontal supports and cannot be hoisted. During the hoisting process, the components need to be rotated and moved horizontally, causing collisions between the components and the supports, posing a safety hazard.

[0003] The invention patent application with publication number CN115897919A and titled "Highly Mechanized Prefabricated Civil Air Defense Staircase at Subway Entrances and Exits and Construction Method" discloses a prefabricated civil air defense staircase at subway entrances and exits and a construction method. The civil air defense staircase is composed of prefabricated stair treads, prefabricated portal columns, etc. The entrance and exit has an open space above the corresponding position of the staircase, and the prefabricated components can be lifted vertically by a mechanized crane. After the prefabricated components are hoisted to the installation position, the reserved load-bearing longitudinal reinforcement of the stair treads and the reserved hoop reinforcement of the columns are staggered with each other. The reserved load-bearing longitudinal reinforcement and reserved hoop reinforcement are tied together by structural reinforcement, and then concrete is poured in the connection groove to form a connection.

[0004] The described civil air defense staircase and its corresponding construction method present the following issues: The structural joints still require steel tying and concrete pouring, requiring on-site secondary finishing after installation, including mortar pouring, tiling, and tile cutting. This secondary finishing process typically utilizes cast-in-place staircase construction. Existing cast-in-place staircase construction methods are labor-intensive and crude, with numerous personnel and overlapping processes, resulting in low construction efficiency. Furthermore, the construction site is dirty, messy, and poorly maintained, easily causing environmental pollution. Utility Model Content

[0005] The purpose of the present invention is to overcome the above-mentioned defects of the prior art and propose a decoration-free assembled staircase for subway entrances and exits, which is quick and convenient to install and greatly improves the construction efficiency and quality of the subway entrance and exit stairs.

[0006] The technical solution of the utility model is: a decoration-free assembled staircase for subway entrances and exits, which includes a plurality of prefabricated staircase slabs connected in sequence;

[0007] Two adjacent prefabricated stair slabs are fixedly connected via stair slab connection nodes;

[0008] A groove is formed between the ends of two adjacent prefabricated stair slabs, and the blind paving bricks are arranged in the groove;

[0009] Prefabricated stair treads and blind bricks form the stair surface.

[0010] In the utility model, the prefabricated stair slabs are arranged in an inclined manner and are arranged in sequence from top to bottom along the inclined direction of the subway entrance and exit bottom plate.

[0011] The upper surface of the prefabricated stair tread is provided with several steps, each step is provided with an anti-slip groove;

[0012] The upper surface of the prefabricated stair slab is also provided with several railing embedded parts, several hoisting embedded parts, and several demoulding embedded parts.

[0013] The prefabricated stair slab is provided with several pin key reserved holes at both ends along its inclined direction;

[0014] Blind brick grooves are respectively provided at both ends of the prefabricated stair slab along its inclined direction.

[0015] Two adjacent tactile paving bricks of two adjacent prefabricated stair slabs are grooved to form a groove in which the tactile paving bricks are placed.

[0016] The stair tread connection node includes a stair column, and a plurality of embedded screws are provided in the stair column;

[0017] The embedded screws are respectively arranged corresponding to the pin key reserved holes at the ends of the prefabricated stair slabs connected thereto, and the embedded screws respectively pass through the corresponding pin key reserved holes.

[0018] The prefabricated stair treads are located above the stair tread connection nodes, and a polyurethane foam filling layer is provided in the gap between two adjacent prefabricated stair treads.

[0019] The beneficial effects of the utility model are:

[0020] (1) Compared with the existing prefabricated staircase structure at the entrance and exit of a subway, the prefabricated staircase structure adopted in this application uses bolts to connect the connection nodes of two adjacent prefabricated staircase slabs. With the precise installation of the hoisting equipment, the concrete pouring and secondary decoration of the two adjacent prefabricated staircase slabs are avoided, which makes the installation quick and convenient, and saves the decoration cost.

[0021] (2) The assembled staircase consists of prefabricated staircase slabs, cast-in-place staircase columns, blind bricks, etc., which replace the existing cast-in-place staircase. It can not only improve construction efficiency and construction quality, reduce construction risks, but also avoid secondary decoration, reduce resource waste, achieve energy conservation and emission reduction, and avoid the pollution of secondary decoration to the environment;

[0022] (3) Since this application does not require secondary decoration, it effectively solves the labor-intensive drawbacks of the cast-in-place staircase construction mode during the secondary decoration process, can greatly reduce the number of workers, and at the same time can improve work efficiency, improve construction efficiency and construction quality, and reduce construction risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the cross-sectional structure of a subway entrance and exit in the present utility model;

[0024] Figure 2 This is a schematic diagram of the top view of the staircase of the present invention;

[0025] Figure 3 This is a schematic diagram of the top view of the prefabricated stair tread in the present invention;

[0026] Figure 4 It is a schematic diagram of the cross-sectional structure at the connection node of the stairs.

[0027] In the figure: 1 prefabricated stair tread, 101 railing embedded parts, 102 pin key reserved holes, 103 lifting embedded parts, 104 demoulding embedded parts, 105 anti-slip grooves, 106 tactile brick slots; 2 stair tread connection nodes, 201 tactile bricks, 202 embedded bolts, 203 polyurethane foam filling layer, 204 stair columns, 3 entrance and exit top plates, 4 entrance and exit bottom plates, 5 entrance and exit side walls. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] The following description sets forth specific details to facilitate a thorough understanding of the present invention. However, the present invention can be implemented in a variety of other ways than those described herein, and those skilled in the art may make similar generalizations without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] like Figure 1 As shown, the structure of the subway entrance and exit includes an entrance and exit floor plate 4, an entrance and exit ceiling plate 3, and entrance and exit side walls 5 on both sides. The upper ends of the entrance and exit side walls 5 on both sides are fixedly connected to the two sides of the entrance and exit ceiling plate 3, and the lower ends of the entrance and exit side walls 5 on both sides are fixedly connected to the two sides of the entrance and exit floor plate 4. The decoration-free subway entrance and exit prefabricated staircase described in the utility model is installed at the above-mentioned subway entrance and exit.

[0031] like Figure 2 As shown, the prefabricated staircase for subway entrances and exits described in the present invention is parallel to the entrance and exit floor and arranged at an angle. It includes several prefabricated staircase treads 1, which are arranged sequentially from top to bottom along the inclination direction of the entrance and exit floor. Adjacent prefabricated staircase treads 1 are fixedly connected by staircase tread connection nodes 2. A groove is formed between adjacent prefabricated staircase treads 1, and a blind paving brick 201 is arranged in the groove.

[0032] In this embodiment, the outer surface of the precast stair slab 1 is treated with a concrete sealant and curing agent. After the precast stair slab is repaired and polished, a concrete sealant and curing agent material is applied. After further treatment such as impregnation, grinding, and polishing, the stair surface becomes hard, wear-resistant, non-slip, and shiny. With the above structure, after the precast stair slab is hoisted to the subway entrance and exit and accurately positioned, the ends of the adjacent precast stair slabs are fixedly connected to the stair slab connection nodes 2, and then the blind paving bricks 201 are installed in the groove formed between the adjacent precast stair slabs. This completes the installation of the subway entrance and exit stairs without the need for subsequent secondary decoration.

[0033] The prefabricated stair tread 1 is arranged at an angle, and its inclination angle is usually consistent with the inclination angle of the subway entrance and exit bottom plate 4. The upper surface of the prefabricated stair tread 1 is provided with several steps, and each step is provided with an anti-skid groove 105. The anti-skid groove 105 plays a role in preventing the surface of the prefabricated stair tread from slipping. The upper surface of the prefabricated stair tread 1 is also provided with several railing embedded parts 101, several hoisting embedded parts 103, and several demoulding embedded parts 104. The railing embedded parts 101 are used to connect the stair tread and the railing. After the prefabricated stair tread is installed in place, the railing is installed on the stair tread through the connection between the railing embedded parts 101 and the railing. The hoisting embedded parts 103 can realize the connection between the crane and the prefabricated stair tread 1, so that the prefabricated stair tread can be hoisted to the subway entrance and exit.

[0034] The prefabricated stair tread 1 is provided with several pin key reserved holes 102 at both ends along its inclined direction. When the connecting bolts pass through the pin key reserved holes 102 of the prefabricated stair tread 1 and the stair tread connection node 2 respectively, the connection between the prefabricated stair tread 1 and the stair tread connection node 2 can be realized.

[0035] At the same time, each prefabricated stair tread 1 has slots 106 for tactile bricks at both ends along its inclination. When two adjacent prefabricated stair treads 1 are connected, the adjacent tactile brick slots 106 on the two prefabricated stair treads form a groove, into which the tactile bricks 201 are placed. Thus, several prefabricated stair treads 1 and the tactile bricks 201 between the adjacent prefabricated stair treads together form the entire stair tread of the subway entrance and exit.

[0036] During the assembly process of prefabricated stair treads, gaps inevitably appear between two adjacent prefabricated stair treads. In this embodiment, a polyurethane foam filling layer 203 is filled in the gap between the two adjacent prefabricated stair treads to achieve a sealed connection between the two adjacent prefabricated stair treads.

[0037] There is a stair slab connection node 2 between two adjacent prefabricated stair slabs. Figure 4As shown, the stair tread connection node 2 described in the present application includes a stair column 204, in which a plurality of embedded bolts 202 are provided, and the embedded bolts 202 in the stair column 204 are arranged corresponding to the pin key reserved holes 102 on the prefabricated stair tread 1.

[0038] In this embodiment, since the stair slab connection node 2 is connected to the prefabricated stair slabs 1 on both sides, Figure 4 As described above, two rows of embedded bolts are provided in the stair slab connection node 2, and each row of embedded bolts is connected to the prefabricated stair slab 1 on one side respectively.

[0039] When the end of the prefabricated stair tread 1 is hoisted above the stair column 204, the pin key reserved holes 102 at the end of the prefabricated stair tread 1 are respectively put on the outside of the embedded bolts 202 of the stair column 204, and the pin key reserved holes 102 are filled to achieve a fixed connection between the prefabricated stair tread 1 and the stair tread connection node 2.

[0040] The installation process of the prefabricated staircase for a subway entrance and exit without renovation described in the present invention is as follows: First, the entrance and exit floor plate 4, entrance and exit ceiling plate 3, entrance and exit side walls 5 on both sides, and several stair columns 204 are cast on-site at the subway entrance and exit. Embedded bolts 202 for connecting the prefabricated stair treads 1 and the stair tread connection nodes 2 are pre-embedded before the stair columns are cast.

[0041] Before installing the prefabricated stair tread 1, check the position of the embedded bolts 202 to ensure they meet the design requirements. Apply a mortar leveling layer, mark the installation location of the prefabricated stair tread 1, and then hoist the prefabricated stair tread 1. Once the prefabricated stair tread 1 is hoisted into place, verify its position. Bolts are then installed to secure it. The pre-recorded holes on the prefabricated stair tread 1 are then filled or sealed with CMG grout, mortar, polystyrene board, and other materials. After sealing the pre-recorded holes, install the blind paving bricks. This completes the installation of the subway entrance and exit staircase.

[0042] The above is a detailed introduction to the decoration-free assembled stairs for subway entrances and exits provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The above description of the disclosed embodiments enables professionals in this field to implement or use the present invention. Various modifications to these embodiments will be obvious to professionals in this field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A decoration-free assembled staircase for subway entrances and exits, characterized in that: It includes several prefabricated stair slabs connected in sequence; Two adjacent prefabricated stair slabs are fixedly connected via stair slab connection nodes; A groove is formed between the ends of two adjacent prefabricated stair slabs, and the blind paving bricks are arranged in the groove; Prefabricated stair treads and blind bricks form the stair surface; The prefabricated stair treads are provided with grooves for blind bricks at both ends along the inclined direction thereof, and the adjacent two grooves for the blind bricks of two adjacent prefabricated stair treads form a groove for placing the blind bricks; The prefabricated stair treads are located above the stair tread connection nodes, and a polyurethane foam filling layer is provided in the gap between two adjacent prefabricated stair treads.

2. The decoration-free subway entrance and exit assembled staircase according to claim 1 is characterized in that: The prefabricated stair slabs are arranged at an angle and are arranged in sequence from top to bottom along the inclination direction of the subway entrance and exit floor.

3. The decoration-free subway entrance and exit assembled staircase according to claim 1 is characterized in that: The upper surface of the prefabricated stair tread is provided with several steps, each step is provided with an anti-slip groove; The upper surface of the prefabricated stair slab is also provided with several railing embedded parts, several hoisting embedded parts, and several demoulding embedded parts.

4. The decoration-free subway entrance and exit assembled staircase according to claim 1 is characterized in that: The prefabricated stair slab is provided with several pin key reserved holes at both ends along its inclined direction; 5. The decoration-free subway entrance and exit assembled staircase according to claim 4 is characterized in that: The stair tread connection node includes a stair column, and a plurality of embedded screws are provided in the stair column; The embedded screws are respectively arranged corresponding to the pin key reserved holes at the ends of the prefabricated stair slabs connected thereto, and the embedded screws respectively pass through the corresponding pin key reserved holes.

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