A prefabricated assembled beam-type staircase with a new type of tread plate structure

Abstract

A prefabricated assembled beam-type staircase with a new type of tread plate structure can better be applicable to space-constrained projects such as subway stations while ensuring safety and reliability, and has good versatility and convenience. The ladder column member is a prefabricated member, and its lower end is fixedly connected to the structural floor through a connecting member; the tread plate member has a tread and an upward-turned rib plate and a downward-suspended rib plate at its rear end, and its cross-section is an inverted T shape. The longitudinal two ends of the tread are respectively supported on the serrated installation platforms of the staircase beam members on the same side, the upward-turned rib plate abuts against the vertical wall between adjacent serrated installation platforms, and the longitudinal two ends of the downward-suspended rib plate respectively abut against the inner side walls of the staircase beam members on the same side. Upper installation holes and lower installation holes are correspondingly formed on the longitudinal two side surfaces of the tread and on the serrated installation platforms of the staircase beam members. The lower end of the railing member passes through the upper installation hole and is inserted into the lower installation hole and fixedly connected thereto.

Description

Technical Field

[0001] The present invention relates to construction, and particularly to a prefabricated assembled beam-type staircase with a novel tread plate structure, which is well suitable for application scenarios such as internal staircases in subway stations where the construction space is limited and hoisting and transportation are difficult. Background Art

[0002] Prefabricated assembled structures have developed relatively maturely in fields such as road bridges and building construction. However, due to reasons such as engineering geology and industrial scale technology levels, there are not many cases of application in subway stations. In order to meet the national development strategy and direction, in view of the current peak stage of subway construction in China and various problems encountered in subway station construction, prefabricated assembled structures, with advantages such as being able to effectively shorten the construction period, reduce the input of construction personnel, reduce the occupation of construction sites, improve construction quality, enhance construction efficiency, shorten the impact on urban ground traffic, and being green, energy-saving and environmentally friendly, have an increasing demand for application in subway projects.

[0003] As a structural member commonly used in the construction field, stairs are provided in multiple locations in each subway station, with a huge demand. Subway stairs are usually constructed secondly after the entire frame structure of the subway station is completed. At this time, due to the limited internal space of the station and often multiple specialties constructing simultaneously, the construction of internal stairs is difficult. Therefore, the demand for prefabricated assembled stairs in subway stations is becoming increasingly urgent. Although the research on prefabricated stairs in civil buildings has been very mature and there are corresponding standards and atlases, the stair types are almost all slab stairs, integral running parts divided into blocks. This type is too large in block size and too heavy in single block for subway projects, making hoisting and installation difficult.

[0004] For existing prefabricated assembled beam-type staircase solutions, the idea is always prefabricated beam + tread plate. However, the type of the tread plate is an "L" shape buckled on a serrated staircase beam, with the internal angle of the tread plate against the external angle of the serrations of the staircase beam. The biggest problem with this solution is that both the strength and stiffness of the tread plate are relatively small. The mid-span moment is large and it is easy to crack, and the mid-span deflection is large, which will cause a large gap between the upper and lower steps, greatly affecting use and safety. Unless the tread plate is made stronger and thicker, it is very difficult to solve this problem.

[0005] Therefore, it is very necessary to design a prefabricated beam-type staircase with a novel tread plate structure to solve the safety and practicality problems of prefabricated beam-type staircases.

[0006] Contents of the Invention Patent

[0007] The technical problem to be solved by the present invention is to provide a prefabricated assembled beam-type staircase with a novel tread plate structure, which can be better applicable to space-limited projects such as subway stations while ensuring safety and reliability, and has good versatility and convenience.

[0008] The technical solution adopted by the present invention to solve this technical problem is as follows:

[0009] A prefabricated and assembled beam-type staircase with a novel tread plate structure of the present invention includes prefabricated column members, staircase beam members, tread plate members, platform plate members, and railing members. The two staircase beam members are erected and fixed on the column members. The tread plate members and platform plate members are installed and fixed on the serrated installation platforms on the upper part of the staircase beam members. Its characteristics are: the column members are prefabricated members, and their lower ends are tightly connected to the structural floor through connecting members; the tread plate members have treads and upward-turned rib plates and downward-suspended rib plates at their rear ends, and their cross-sections are in an inverted T shape. The longitudinal two ends of the treads are respectively supported on the serrated installation platforms of the same-side staircase beam members. The upward-turned rib plates are abutted and closely attached to the vertical walls between adjacent serrated installation platforms. The longitudinal two ends of the downward-suspended rib plates are respectively abutted against the inner side walls of the same-side staircase beam members; corresponding upper installation holes and lower installation holes are opened on the longitudinal two side surfaces of the treads and on the serrated installation platforms of the staircase beam members. The lower end of the railing member passes through the upper installation hole and is inserted into the lower installation hole and tightly connected thereto.

[0010] The beneficial effects of the present invention are as follows: a more reasonable block design is carried out for the beam-type staircase structure, which is split into multiple components with light weight and small volume, facilitating production, transportation, and installation; in combination with the actual situation of space-limited projects such as subways, the tread plates are made into dimensions with strong versatility and can be applied to various types of staircase structures in different positions; the connection methods mainly adopt mortise and tenon joints, buckles, and bolt connections, which are convenient and reliable, and the construction efficiency is significantly improved; it can effectively shorten the construction period of the staircase, solve problems such as limited construction space and difficulty in transporting materials in and out, and at the same time, a large amount of formwork engineering and labor input can be saved, having very good economic benefits and promotion prospects. Description of the Drawings

[0011] This specification includes the following eight drawings:

[0012] Figure 1 is the plan view of a prefabricated and assembled beam-type staircase with a novel tread plate structure of the present invention;

[0013] Figure 2 is the elevation view of a prefabricated and assembled beam-type staircase with a novel tread plate structure of the present invention;

[0014] Figure 3 is the three-dimensional view of the column member in a prefabricated and assembled beam-type staircase with a novel tread plate structure of the present invention;

[0015] Figure 4 is the schematic diagram of the connection method between the column member and the structural floor in a prefabricated and assembled beam-type staircase with a novel tread plate structure of the present invention;

[0016] Figure 5It is a three-dimensional view of the stair beam member in the prefabricated and assembled beam-type staircase with a novel tread plate structure of the present invention;

[0017] Figure 6 It is a schematic diagram of the connection method between the stair beam member, the tread plate member and the railing member in the prefabricated and assembled beam-type staircase with a novel tread plate structure of the present invention;

[0018] Figure 7 It is a three-dimensional view of the tread plate member in the prefabricated and assembled beam-type staircase with a novel tread plate structure of the present invention;

[0019] Figure 8 It is a schematic diagram of the assembly method of the tread plate member in the prefabricated and assembled beam-type staircase with a novel tread plate structure of the present invention;

[0020] The figure shows the components and corresponding marks: the ladder column member 10, the column 11, the cross beam 12, the mortise groove 13, the grouting sleeve 14, the embedded steel bar 15, the connecting bolt 16, the stair beam member 20, the serrated installation platform 21, the positioning tenon 22, the lower installation hole 23, the tread plate member 30, the tread 31, the upward turning rib plate 32, the downward hanging rib plate 33, the upper installation hole 34, the platform plate member 40, the railing member 50, the structural bottom plate D, and the height H of the downward hanging rib plate. Detailed implementation manners

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Refer to Figure 1 and Figure 2 For a prefabricated and assembled beam-type staircase with a novel tread plate structure of the present invention, it includes prefabricated and formed ladder column members 10, stair beam members 20, tread plate members 30, platform plate members 40 and railing members 50. The two side stair beam members 20 are erected and fixed on the ladder column members 10, and the tread plate members 30 and the platform plate members 40 are installed and fixed on the serrated installation platform 21 on the upper part of the stair beam members 20. The lower end of the ladder column member 10 is tightly connected to the structural bottom plate D through a connecting member, realizing the full prefabrication and assembly of the beam-type staircase, and the construction is convenient and fast.

[0023] Refer to Figure 7 and Figure 8, the tread plate member 30 has a tread 31 and an upturned rib plate 32 and a lower suspension rib plate 33 at its rear end, and its cross-section is an inverted T shape. The longitudinal two ends of the tread 31 are respectively supported on the serrated installation platforms 21 of the same-side stair beam member 20. The upturned rib plate 32 abuts against the vertical wall between adjacent serrated installation platforms 21, and the longitudinal two ends of the lower suspension rib plate 33 respectively abut against the inner side walls of the same-side stair beam member 20. This new type of tread plate structure can better exert the structural strength and stiffness of the tread plate member 30, and with less materials, it can bear greater forces and produce less deformation. By adjusting the height H of the lower suspension rib plate, the stiffness of the tread plate member 30 can be changed to meet the deflection and deformation requirements of the tread plate member 30 under different span conditions. Due to the existence of the upturned rib plate 32 and the lower suspension rib plate 33, the lower tread plate member 30 can provide a very strong support function for the upper tread plate member 30, making the tread plate member 30 form a one-way slab with the short side as the main stress direction, thereby greatly improving the bearing capacity of the tread plate member 30. Therefore, under the same conditions, the tread plate can be made thinner, saving more materials and costs, and being lighter in weight, which is convenient for transportation and installation.

[0024] Refer to Figure 5 , Figure 6 and Figure 7 , corresponding upper mounting holes 34 and lower mounting holes 23 are respectively provided on the longitudinal two side surfaces of the tread 31 and on the serrated installation platforms 21 of the stair beam member 20. The lower end of the railing member 50 passes through the upper mounting hole 34 and is inserted into the lower mounting hole 23 and fixedly connected thereto, so that it is very simple to install and fix the tread plate member 30 and the railing member 50 on the stair beam member 20.

[0025] Refer to Figure 3 and Figure 4 , the ladder column member 10 is a portal structure composed of a cross beam 12 and two side columns 11. Concave mortise grooves 13 are provided on the top surfaces of the longitudinal two sides of the cross beam 12, and connecting bolts 16 are embedded in the mortise grooves 13. The bottom of the longitudinal two ends of the ladder beam member 20 has positioning tenons 22 corresponding to and adapted to the mortise grooves 13, and the connecting bolts 16 pass through the positioning tenons 22 to fixedly install the ladder beam member 20 on the ladder column member 10. Refer to Figure 2 , a grouting sleeve 14 extending vertically is embedded at the lower end of the column 11, and the embedded steel bars 15 on the structural floor D are inserted into the grouting sleeve 14, and mortar is poured into the grouting sleeve 14 to fixedly install the column 11 on the structural floor D.

[0026] Refer to Figure 1 and Figure 2, during construction, first insert the ladder column member 10 into the embedded steel bar 15 on the structural floor slab D through the grouting sleeve 14 at the column foot. After the grouting reaches the design strength, buckle the positioning tenon 22 of the stair beam member 20 into the tenon groove 13 on the cross beam 12 and connect and fix it with the embedded connecting bolt 16. Then, assemble the tread plate members 30 one by one on the serrated installation platform 21 of the stair beam member 20 and connect them with the railing member 50. Finally, lay the platform plate member 40 on the serrated installation platform 21 at the end of the stair beam member 20 and also connect and fix it with the railing member 50, that is, assemble to form a complete stair structure.

[0027] The above is only to illustrate some principles of a prefabricated and assembled beam-type staircase with a novel tread plate structure of the present invention by diagrams, and it is not intended to limit the present invention to the specific structures and applicable scopes shown and described. Therefore, all possible corresponding modifications and equivalents that can be utilized belong to the scope of the patent applied for by the present invention.

Claims

1. A prefabricated and assembled beam-type staircase with a novel tread plate structure, comprising prefabricated and formed ladder column members (10), staircase beam members (20), tread plate members (30), landing plate members (40) and railing members (50). The two staircase beam members (20) are erected and fixed on the ladder column members (10), and the tread plate members (30) and landing plate members (40) are installed and fixed on a serrated installation platform (21) on the upper part of the staircase beam members (20). It is characterized in that: The lower end of the ladder column member (10) is fixedly connected to the structural floor slab (D) through a connecting member; the tread plate member (30) has a tread (31) and an upwardly turned rib plate (32) and a downwardly hanging rib plate (33) at its rear end, and its cross-section is an inverted T shape. The longitudinal two ends of the tread (31) are respectively supported on the serrated mounting platforms (21) of the same-side stair beam members (20). The upwardly turned rib plate (32) abuts against the vertical wall between the adjacent serrated mounting platforms (21). The longitudinal two ends of the downwardly hanging rib plate (33) respectively abut against the inner side walls of the same-side stair beam members (20); upper mounting holes (34) and lower mounting holes (23) are correspondingly formed on the longitudinal two side surfaces of the tread (31) and on the serrated mounting platforms (21) of the stair beam members (20). The lower end of the railing member (50) passes through the upper mounting hole (34) and is inserted into the lower mounting hole (23) and fixedly connected thereto.

2. The prefabricated assembled beam-type staircase with a novel tread plate structure according to claim 1, characterized in that: The ladder column member (10) is a portal structure composed of a cross beam (12) and two side columns (11). Concave mortises (13) are provided on the top surfaces of the longitudinal two sides of the cross beam (12), and connecting bolts (16) are embedded in the mortises (13); positioning tenons (22) corresponding to and adapted to the mortises (13) are provided at the bottoms of the longitudinal two ends of the stair beam member (20). The connecting bolts (16) pass through the positioning tenons (22) to fixedly mount the stair beam member (20) on the ladder column member (10).

3. The precast and assembled beam-type staircase with a novel tread plate structure according to claim 2, characterized in that: A grouting sleeve (14) extending vertically is embedded at the lower end of the column (11). The embedded steel bars (15) on the structural floor slab (D) are inserted into the grouting sleeve (14), and the column (11) is fixedly mounted on the structural floor slab (D) by pouring and filling cement mortar into the grouting sleeve (14).

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