Precast staircase structure and its installation method

Abstract

This invention relates to a prefabricated staircase structure and its installation method, addressing the problem that prefabricated staircases designed for standard floors cannot be installed on floors with varying heights. The prefabricated staircase structure includes a prefabricated staircase located above a stair beam; and a reinforcing beam located between the prefabricated staircase and the stair beam. The reinforcing beam includes a positioning mounting surface, on which the prefabricated staircase is positioned and installed. A height difference exists between the positioning mounting surface and the stair beam. At least a portion of the reinforcing beam is used for connection to the stair beam. Using this prefabricated staircase structure and its installation method, a prefabricated staircase can be installed on a stair beam with a height difference.

Description

Technical Field

[0001] This invention relates to the technical field of prefabricated building construction, and in particular to a prefabricated staircase structure and its installation method. Background Technology

[0002] In recent years, with the rapid development of prefabricated concrete structure buildings, its application scope has expanded from the original multi-story buildings and high-rise buildings to super high-rise buildings. Prefabricated buildings usually use prefabricated stair structures assembled on stair beams to realize the function of stairs. Compared with traditional cast-in-place stairs, prefabricated stairs have the characteristics of high installation efficiency and fast construction speed. Therefore, prefabricated stairs are also widely used in prefabricated buildings.

[0003] However, due to safety or functional requirements, buildings often have floors with height differences exceeding those of standard floors. For example, refuge floors are required in super high-rise buildings, and these refuge floors are typically taller than standard floors; these are floors with height differences. In such cases, if a dedicated prefabricated staircase is made for a floor with height differences, an additional mold is needed, increasing project costs and creating difficulties in production and construction, contradicting the standardized design principles of prefabricated buildings. Furthermore, if prefabricated staircases designed for standard floors are used in floors with height differences, installation becomes impossible due to the height difference between the prefabricated staircase and the stair beams.

[0004] Therefore, it is necessary to provide a prefabricated staircase structure and its installation method to address the problem that the height difference between the prefabricated staircase and the stair beam makes it impossible to install the prefabricated staircase. Summary of the Invention

[0005] On the one hand, the present invention provides a prefabricated staircase structure that can install prefabricated stairs on a stair beam with a height difference.

[0006] A prefabricated staircase structure includes a prefabricated staircase and a reinforcing beam. The prefabricated staircase is located above a stair beam, and the reinforcing beam is located between the prefabricated staircase and the stair beam. The reinforcing beam includes a positioning and mounting surface. The prefabricated staircase is positioned and mounted on the reinforcing beam via this surface. Furthermore, a height difference exists between the positioning and mounting surface and the stair beam. Additionally, at least a portion of the reinforcing beam is used for connection to the stair beam. This prefabricated staircase structure uses a reinforcing beam to connect the prefabricated staircase and the stair beam. The reinforcing beam provides a positioning and mounting surface, and the height difference between the positioning and mounting surface and the stair beam allows the prefabricated staircase to be positioned and mounted on the positioning and mounting surface, thereby enabling the prefabricated staircase to be installed on the stair beam with a height difference.

[0007] In one embodiment, the reinforcing beam includes a first mounting portion and a second mounting portion, which are anchored together. Further, the first mounting portion is anchored to the stair beam, or the second mounting portion is anchored to the stair beam. The first mounting portion, the second mounting portion, and the stair beam form an integral load-bearing structure, thereby possessing sufficient structural strength and stiffness to further ensure the stability of the prefabricated staircase installation.

[0008] In one embodiment, the first mounting part includes a first reinforcing steel cage, and the second mounting part includes a second reinforcing steel cage. Vertically, the first reinforcing steel cage protrudes beyond the second reinforcing steel cage. Horizontally, the second reinforcing steel cage protrudes beyond the first reinforcing steel cage. The first and second reinforcing steel cages can be detachably connected or integrally formed. First, the connected first and second reinforcing steel cages improve the overall integrity of the first and second mounting parts and meet structural strength requirements. Second, the reinforcing beam using this structure not only allows for flexible adjustment of the installation position and form of the prefabricated staircase, but also allows for adjustment of the relative positions of the first and second mounting parts by changing the relative positions of the first and second reinforcing steel cages, thereby adapting to the height and shape of the prefabricated staircase and achieving precise positioning and installation.

[0009] In one embodiment, the aforementioned positioning mounting surface includes a first positioning mounting surface located between the first mounting part and the precast staircase. The first positioning mounting surface has a plurality of first positioning reinforcing bars protruding from it, which are positioned and installed with a plurality of precast holes on the precast staircase. The precise positioning of the precast staircase is further achieved through the cooperation of the first positioning reinforcing bars with the precast holes.

[0010] In one embodiment, the aforementioned positioning mounting surface includes a second positioning mounting surface located between the second mounting part and the prefabricated staircase. A leveling layer is provided on the second positioning mounting surface, and the prefabricated staircase is installed on the leveling layer to ensure that the prefabricated staircase is installed on a horizontal plane. The leveling layer improves the stability of the prefabricated staircase installation and enables precise positioning of the prefabricated staircase.

[0011] In one embodiment, a gap is left between the prefabricated staircase and the first mounting section, and a filling layer is provided in the gap. Providing a filling layer can improve the seismic resistance of the prefabricated staircase structure and eliminate deformation of the prefabricated staircase and reinforcing beams caused by climate temperature changes.

[0012] In one embodiment, the second positioning mounting surface is provided with a plurality of second positioning reinforcing bars, which are positioned and installed with a plurality of pre-drilled holes on the prefabricated staircase. The precise positioning of the prefabricated staircase is achieved through the cooperation of the second positioning reinforcing bars and the pre-drilled holes.

[0013] On the other hand, the present invention provides a method for installing prefabricated stairs, which can install the prefabricated stairs on a ladder beam with a height difference.

[0014] A method for installing a prefabricated staircase includes the following steps: obtaining a reinforcing beam and a stair beam, the reinforcing beam including a positioning mounting surface; connecting at least a portion of the reinforcing beam above the stair beam to maintain a height difference between the positioning mounting surface of the reinforcing beam and the stair beam; obtaining a prefabricated staircase; and positioning and installing the prefabricated staircase on the positioning mounting surface so that the reinforcing beam is located between the prefabricated staircase and the stair beam.

[0015] In one embodiment, the steps of obtaining the reinforcing beam and the stair beam, wherein the reinforcing beam includes the positioning mounting surface, include: obtaining the standard floor height, the differential floor height, the differential floor elevation, and the height of the prefabricated staircase installation section; calculating the height of the first installation part and the elevation of the second installation part based on the standard floor height, the differential floor height, and the height of the prefabricated staircase installation section; wherein the first installation part and the second installation part are connected to form the reinforcing beam, and the elevation of the second installation part is the height of the positioning mounting surface.

[0016] The dimensions of the first and second installation parts are calculated based on the acquired data, which facilitates the adaptation to the prefabricated stairs being installed and enables precise installation of the prefabricated stairs.

[0017] In one embodiment, the step of connecting at least a portion of the reinforcing beam to the upper part of the ladder beam to maintain a height difference between the positioning mounting surface of the reinforcing beam and the ladder beam includes: obtaining a first reinforcing cage at the same height as the first mounting part; obtaining a second reinforcing cage; binding and overlapping the first and second reinforcing cages above the reinforcing cage of the ladder beam; wherein, in the vertical direction, the first reinforcing cage protrudes from the second reinforcing cage, and in the horizontal direction, the second reinforcing cage protrudes from the first reinforcing cage; wherein, the elevation of the second reinforcing cage is the elevation of the second mounting part; and concrete is poured for the first reinforcing cage, the second reinforcing cage, and the reinforcing cage of the ladder beam, wherein the first reinforcing cage, after pouring, becomes the first mounting part, and the second reinforcing cage, after pouring concrete, becomes the second mounting part.

[0018] The above steps connect the first installation part, the second installation part, and the ladder beam into an integral structure, which meets the structural strength and rigidity required for the installation of prefabricated stairs, and further ensures the stability of the prefabricated stairs installation. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the prefabricated staircase structure of the present invention;

[0020] Figure 2 This is a structural schematic diagram of another embodiment of the reinforcing beam of the present invention;

[0021] Figure 3This is a structural schematic diagram of one embodiment of the prefabricated staircase positioning and installation of the present invention;

[0022] Figure 4 This is a structural schematic diagram of another embodiment of the prefabricated staircase positioning and installation of the present invention;

[0023] Figure 5 This is a flowchart illustrating the steps of the prefabricated staircase installation method of the present invention.

[0024] Icon labels:

[0025] 100-Staircase beam; 110-Staircase beam reinforcement cage; 200-Reinforcing beam; 300-Precast staircase; 310-Precast hole; 320-Precast staircase installation section; 210-Positioning installation surface; 211-First positioning installation surface; 212-Second positioning installation surface; 220-First installation part; 230-Second installation part; 221-First reinforcement cage; 222-Vertical reinforcement; 231-Second reinforcement cage; 232-Stirrup; 240-Positioning reinforcement; 241-First positioning reinforcement; 242-Second positioning reinforcement; 250-Leveling layer; 260-Filling layer; 2421-Threaded section; 2422-Nut; 311-First connecting hole; 312-Second connecting hole; 313-Limiting surface; 314-Reinforcing reinforcement; 270-Supplementary platform stage; 280-First horizontal plane. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] In recent years, prefabricated staircases have been widely used. This involves manufacturing prefabricated staircases of a uniform model in advance and applying them to standard floors with matching heights. The common practice is to embed stair beams in the wall panels or floor slabs and then install the prefabricated staircases onto these beams to achieve the staircase's function. However, in actual construction, there are often floors whose heights do not match the uniform model of the prefabricated staircases—these are called "discrepant floors"—making it impossible to directly install the prefabricated staircases onto the stair beams.

[0033] To address the aforementioned issues, this solution provides a prefabricated staircase structure that allows for the application of prefabricated stairs to floors with varying heights; specifically, the prefabricated stairs can be installed on stair beams that differ in height from the standard floors. Taking the case where the height of the floor with varying heights is higher than that of the standard floor, the application of this prefabricated staircase structure is illustrated below. Figure 1 The prefabricated staircase structure of this scheme includes a prefabricated staircase 300 and a reinforcing beam 200. The prefabricated staircase 300 is located above the stair beam 100, and the reinforcing beam 200 is located between the prefabricated staircase 300 and the stair beam 100. The prefabricated staircase 300 is positioned and installed on the reinforcing beam 200, and the reinforcing beam 200 is at least partially structurally connected to the stair beam 100.

[0034] It should be noted that this solution does not limit the specific structure and location of the installed ladder beam 100, as long as it can achieve the function of the ladder beam 100. For example, the ladder beam 100 can be constructed in a "Z", "L", or "I" shape. For example, the ladder beam 100 can be set at the end of the floor slab or directly on one side of the wall panel. This solution does not limit the connection method between the ladder beam 100 and the floor slab or wall panel, as long as it can achieve the function of the ladder beam 100. The ladder beam 100 can be pre-embedded in the floor slab or wall panel, or it can be integrally cast with the floor slab or wall panel. For example, the ladder beam 100 is pre-embedded at the end of the floor slab. The ladder beam 100 includes a ladder beam steel reinforcement cage 110, which is lapped and tied to the steel reinforcement extending from the end of the floor slab. After pouring concrete, the ladder beam 100 is anchored to the floor slab as an integral structure.

[0035] Furthermore, this solution does not limit the specific shape, size, or type of the prefabricated staircase 300, as long as it can achieve the function of the prefabricated staircase 300. For example, the prefabricated staircase 300 can be a beam staircase or a slab staircase.

[0036] Furthermore, refer to Figure 1 The reinforcing beam 200 is provided with a positioning mounting surface 210, on which the prefabricated staircase 300 is positioned and installed with the reinforcing beam 200. A height difference is provided between the positioning mounting surface 210 and the stair beam 100, and this height difference is maintained within a preset range. To ensure the stability and operability of the prefabricated staircase 300 installation, this preset range can be 15mm-150mm. This application does not limit the specific direction and angle of the positioning mounting surface 210, as long as it matches the prefabricated staircase 300 and enables its positioning and installation.

[0037] To further facilitate the positioning and installation of the prefabricated staircase 300, the reinforcing beam 200, exemplarily, includes a first mounting portion 220 and a second mounting portion 230, which can be connected as an integral load-bearing structure. Vertically, the first mounting portion 220 protrudes beyond the second mounting portion 230. Horizontally, the second mounting portion 230 protrudes beyond the first mounting portion 220. This design does not limit the specific orientation and position of the first mounting portion 220 and the second mounting portion 230, as long as they match the prefabricated staircase 300, enabling its positioning and installation while providing structural strength to support it.

[0038] For example, the first mounting part 220 can be arranged vertically, and the second mounting part 230 can be arranged horizontally, with the two forming a 90° angle. Alternatively, the angle between the first mounting part 220 and the second mounting part 230 can be any angle between 0° and 180°, as long as it can match the prefabricated staircase 300 and achieve stable installation of the prefabricated staircase 300.

[0039] For example, refer to Figure 1 The second mounting portion 230 can be horizontally disposed in the middle of the first mounting portion 220. In this case, both ends of the first mounting portion 220 protrude from the second mounting portion 230, and the end of the second mounting portion 230 near the prefabricated staircase 300 protrudes from the first mounting portion 220. The first mounting portion 220 and the second mounting portion 230 together form a "T"-shaped structure. For example, refer to... Figure 2 The second mounting part 230 can also be horizontally disposed at the end of the first mounting part 220. The end of the first mounting part 220 near the prefabricated staircase 300 protrudes from the second mounting part 230, and the end of the second mounting part 230 near the prefabricated staircase 300 protrudes from the first mounting part 220. The first mounting part 220 and the second mounting part 230 together form an "L" shaped structure.

[0040] The reinforcing beam 200 with the above structure can not only flexibly adjust the installation position and installation form of the prefabricated staircase 300, but also adjust the relative setting position between the first installation part 220 and the second installation part 230 to adapt to the height and shape of the prefabricated staircase 300, thereby achieving precise positioning and installation of the prefabricated staircase.

[0041] Since this solution is applied to prefabricated buildings, in order to have sufficient structural strength, rigidity, and stability, the first mounting part 220 and the second mounting part 230 are interconnected to form an integral load-bearing structure. For example, the first mounting part 220 and the second mounting part 230 are anchored together.

[0042] Furthermore, the reinforcing beam 200 and the stair beam 100 are interconnected to form an integrated load-bearing structure, ensuring the stability of the prefabricated staircase 300 during installation. (Refer to...) Figure 1 and Figure 2 For example, the reinforcing beam 200 can be anchored to the stair beam 100 via the first mounting part 220. The end of the first mounting part 220 furthest from the precast staircase 300 is anchored to the stair beam 100, and the second mounting part 230 is horizontally positioned in the middle of the first mounting part 220 and anchored to it. Alternatively, the reinforcing beam 200 can also be anchored to the stair beam 100 via the second mounting part 230. The end of the second mounting part 230 furthest from the precast staircase 300 is anchored to the stair beam 100, and the first mounting part 220 is located directly above the stair beam 100 and anchored to it. Thus, the first mounting part 220, the second mounting part 230, and the stair beam 100 form an integral load-bearing structure, ensuring the stability of the precast staircase 300 installation.

[0043] For example, refer to Figure 1 and Figure 2 The aforementioned reinforcing beam 200 is a cast-in-place concrete structure. In order to constrain the concrete, improve the integrity of the reinforcing beam 200 and meet the requirements of structural strength, its first installation part 220 includes a first steel reinforcement cage 221, and the second installation part 230 includes a second steel reinforcement cage 231. The first steel reinforcement cage 221 and the second steel reinforcement cage 231 together construct the preset shape of the reinforcing beam 200 before pouring concrete, thereby forming an integral load-bearing structure.

[0044] The first reinforcing bar cage 221 and the second reinforcing bar cage 231 are connected, and the connection can be detachable or fixed. For example, the first reinforcing bar cage 221 and the second reinforcing bar cage 231 can be tied and lapped together with reinforcing bars. Alternatively, the first reinforcing bar cage 221 and the second reinforcing bar cage 231 can be welded together. Furthermore, the first reinforcing bar cage 221 and the second reinforcing bar cage 231 can be integrally formed, saving construction steps on site and facilitating construction.

[0045] This design does not limit the specific orientation and position of the first and second reinforcing bar cages 221 and 231, as long as they can achieve the constraint and stable connection of the first mounting part 220 and the second mounting part 230. (Refer to...) Figure 1 For example, the first reinforcing bar cage 221 can be set vertically, the second reinforcing bar cage 231 can be set horizontally, and the second reinforcing bar cage 231 can be set horizontally above the first reinforcing bar cage 221.

[0046] This solution does not limit the specific shape of the first reinforcing bar cage 221 and the second reinforcing bar cage 231, as long as the reinforcing bar cage can fulfill its function in the cast-in-place concrete structure. For example, both the first reinforcing bar cage 221 and the second reinforcing bar cage 231 can be constructed as cuboid structures.

[0047] For example, a plurality of vertical bars 222 extend from one side of the first reinforcing steel cage 221. These vertical bars 22 can extend into and connect with the aforementioned ladder beam reinforcing steel cage 110. After concrete pouring, the two are anchored into an integral structure. In addition to anchoring to the ladder beam 100, the vertical bars 222 also share the pressure with the concrete during use. To fix the position of the second reinforcing steel cage 231 on the first reinforcing steel cage 221, so that the first reinforcing steel cage 221 and the second reinforcing steel cage 231 form a robust skeleton structure, the second reinforcing steel cage 231 may include a plurality of stirrups 232. The plurality of stirrups 232 are arranged sequentially along the length of the second reinforcing steel cage 231. One side of each stirrup 232 is inserted into the first reinforcing steel cage 221, and the second reinforcing steel cage 231 is fixed to the predetermined position of the first reinforcing steel cage 221 by tying and lapping. After concrete pouring, the first mounting part 220, the second mounting part 230, and the ladder beam 100 are anchored into an integral structure.

[0048] In this design, vertical bars 222 refer to longitudinal reinforcing bars, and stirrups 232 refer to transverse reinforcing bars. The first and second reinforcing bar cages 221 can include either vertical bars 222 or stirrups 232. Furthermore, this design does not limit the specific shapes of the vertical bars 222 and stirrups 232, as long as they fulfill the functions of the first and second reinforcing bar cages 221 and 231. For example, the vertical bars 222 can be strip-shaped or hook-shaped. For example, the stirrups 232 can be rectangular or polygonal, and can be closed or open.

[0049] Furthermore, refer to Figure 1 The precast staircase 300 can be positioned and installed on the positioning mounting surface 210 in various ways with respect to the reinforcing beam 200. For example, the positioning mounting surface 210 may include a first positioning mounting surface 211, located between the first mounting part 220 and the precast staircase 300, through which the precast staircase 300 is positioned and installed with the reinforcing beam 200. Alternatively, the positioning mounting surface 210 may also include a second positioning mounting surface 212, located between the second mounting part 230 and the precast staircase 300, through which the precast staircase 300 is positioned and installed with the reinforcing beam 200.

[0050] Furthermore, refer to Figure 1 , Figure 3 and Figure 4 To enhance the accuracy and convenience of positioning and installation between the beam 200 and the precast staircase 300, the reinforcing beam 200 further includes multiple positioning reinforcing bars 240. Each positioning reinforcing bar 240 has one end anchored to the reinforcing beam 200 and the other end protruding from the positioning mounting surface 210. For example, the multiple positioning reinforcing bars 240 may include multiple first positioning reinforcing bars 241, which are anchored to the reinforcing beam 200 via a first mounting portion 220 and protrude from the first positioning mounting surface 211. For example, the multiple positioning reinforcing bars 240 may also include multiple second positioning reinforcing bars 242, which are anchored to the reinforcing beam 200 via a second mounting portion 230 and protrude from the second positioning mounting surface 212.

[0051] Correspondingly, the prefabricated staircase 300 includes multiple prefabricated holes 310 corresponding one-to-one with the aforementioned positioning reinforcing bars 240. The multiple positioning reinforcing bars 240 are positioned and installed with the multiple prefabricated holes 310 on the prefabricated staircase 300. This solution does not limit the specific orientation and position of the prefabricated holes 310, as long as it enables the positioning and installation of the prefabricated staircase 300. For example, the prefabricated holes 310 can face the first mounting portion 220 and be horizontally oriented, with the multiple first positioning reinforcing bars 241 positioned and installed with their corresponding prefabricated holes 310. For example, the prefabricated holes 310 can also face the second mounting portion 230 and be vertically oriented, with the multiple second positioning reinforcing bars 242 positioned and installed with their corresponding prefabricated holes 310.

[0052] Furthermore, there are various methods for positioning and installing the positioning reinforcement 240 and the precast holes 310. (Refer to...) Figure 3 For example, the pre-drilled hole 310 is set in the vertical direction and is positioned and installed with the second positioning steel bar 242. The end of the second positioning steel bar 242 protruding from the second positioning mounting surface 212 is provided with a threaded section 2421, and a matching nut 2422 is provided on the threaded section 2421.

[0053] Accordingly, the pre-drilled hole 310 includes a first connecting hole 311 and a second connecting hole 312 that are connected. The diameter of the first connecting hole 311 is larger than that of the second connecting hole 312, and a limiting surface 313 is formed at the connection between the first connecting hole 311 and the second connecting hole 312. During positioning and installation, the threaded section 2421 of the second positioning steel bar 242 passes through the second connecting hole 312 and the first connecting hole 311 in sequence, and is bolted to the limiting surface 313 with the aforementioned nut 2422. Afterwards, cement mortar or other grouting material is injected into the first connecting hole 311 to seal the pre-drilled hole 310. Furthermore, a washer can be provided between the aforementioned nut 2422 and the limiting surface 313. One or more washeres can be provided; for example, two washers are provided. Furthermore, a reinforcing rib 314 is also pre-embedded around each pre-drilled hole 310 to resist stress concentration caused by the setting of the pre-drilled hole 310 and to prevent the pre-drilled hole from cracking. The reinforcing rib 314 can be configured in various shapes; for example, the reinforcing rib 314 can be configured as a "U" shape.

[0054] Furthermore, refer to Figure 1 Because the reinforcing beam has poor flatness, directly installing the precast staircase 300 onto the reinforcing beam 200 would affect the stability of the staircase. Therefore, this solution provides a leveling layer 250 on the second positioning and installation surface 212. During positioning and installation, the precast staircase 300 is installed on this leveling layer 250 to ensure that the precast staircase 300 is installed on a horizontal plane, thereby eliminating problems such as loosening, hollowing, sanding, and cracking, improving the stability of the precast staircase 300 installation, and achieving precise positioning of the precast staircase 300. It should be noted that the leveling layer 250 in this solution refers to a structural layer that serves to level, slope, or reinforce the structure, and can be laid using cement mortar or cement concrete. For example, the leveling layer 250 can be a cement mortar layer with a cement-to-mortar volume ratio of 1:1, and its edges can be sealed with polystyrene, wherein the strength grade of the cement mortar should not be lower than M15. The thickness of the leveling layer 250 ranges from 20-50mm; for example, the thickness of the leveling layer 250 can be 20mm. This solution does not limit the specific structure and materials of the leveling layer 250, as long as it can achieve its function.

[0055] Furthermore, to improve seismic resistance and eliminate deformation of the precast staircase 300 and reinforcing beam 200 caused by climate and temperature changes, a gap is left between the precast staircase 300 and the first mounting part 220. A filling layer 260 is provided within this gap, covering the entire gap. The thickness of this gap ranges from 20-50 mm; exemplarily, the gap can be set to 30 mm. To resist vibration and deformation, the filling layer 260 uses a cushioning material; exemplarily, the filling layer 260 can be filled with polystyrene, topped with a PE rod, and sealed with sealant. Exemplarily, the sealant can be a 30x30 mm sealing strip.

[0056] Because there is a height difference of 15-150mm between the precast staircase 300 and the stair beam 100 in this design, in order to achieve a smooth transition between the precast staircase 300 and the stair beam 100, and for aesthetic purposes, refer to Figure 1 A supplementary platform stage 270 is provided on the side of the reinforcing beam 200 facing away from the precast staircase 300. For example, the reinforcing beam 200 is connected to the stair beam 100 at a first horizontal plane 280, and the supplementary platform stage 270 extends from the first horizontal plane 280 to the height range of the precast staircase 300. This height range refers to the allowable height difference between the supplementary platform stage 270 and the precast staircase 300. This solution does not limit the specific value of this height difference, as long as it can achieve the transition function between the precast staircase 300 and the first horizontal plane 280. This solution does not limit the specific structure, size, or material of the supplementary platform stage 270, as long as it can achieve its function. For example, the supplementary platform stage 270 can be a brick step or a cast-in-place concrete step.

[0057] Furthermore, this solution also provides an installation method for the prefabricated staircase 300, which allows the prefabricated staircase 300 to be applied to floors with different heights; that is, the prefabricated staircase 300 can be installed on the stair beam 100, which has a different height. (Refer to...) Figure 5 , Figure 5 A flowchart illustrating the installation method of the prefabricated staircase 300 of the present invention is shown. The installation method of the prefabricated staircase 300 of this invention includes the following steps:

[0058] Step S1: Obtain the reinforcing beam 200 and the ladder beam 100. The reinforcing beam 200 includes a positioning mounting surface 210.

[0059] In the implementation of this scheme, the reinforcing beam 200 and the stair beam 100 are obtained according to the construction plan and the actual application scenario. The reinforcing beam 200 is provided with a positioning and installation surface 210 to realize the subsequent positioning and installation of the prefabricated staircase 300.

[0060] Step S2: Connect at least a portion of the structure of the reinforcing beam 200 to the upper part of the ladder beam 100 so that a height difference is maintained between the positioning mounting surface 210 of the reinforcing beam 200 and the ladder beam 100.

[0061] In this embodiment, at least a portion of the reinforcing beam 200 is connected to the stair beam 100, maintaining a height difference between the positioning and mounting surface 210 of the reinforcing beam 200 and the stair beam 100. This ensures that the precast staircase 300 can be installed on floors with different heights. Furthermore, the reinforcing beam 200 and the stair beam 100 form an integrated load-bearing structure, meeting the structural strength and stiffness requirements for the precast staircase 300 installed on the different floors. The stair beam 100 is directly connected to the different floor, and the height of the stair beam 100 is the same as the height of the different floor's floor surface. Moreover, this embodiment does not limit the connection form or location between the stair beam 100 and the different floor, as long as the function of the stair beam 100 is achieved.

[0062] Step S3: Obtain the prefabricated staircase 300.

[0063] In this embodiment, the prefabricated staircase 300 obtained can be of the same specification as the prefabricated staircase 300 installed on a standard floor, or it can be of a different specification. This embodiment does not limit the specific shape, size, or type of the prefabricated staircase 300, as long as it can fulfill the function of the prefabricated staircase 300. For example, the prefabricated staircase 300 can be a beam-type staircase or a slab-type staircase.

[0064] Step S4: Position and install the precast staircase 300 on the positioning and installation surface 210 so that the reinforcing beam 200 is located between the precast staircase 300 and the ladder beam 100.

[0065] In this embodiment of the solution, the reinforcing beam 200 supports the prefabricated staircase 300 above the ladder beam 100, and positions and installs the prefabricated staircase 300 on the positioning and mounting surface 210 of the reinforcing beam 200 to ensure that the function of the prefabricated staircase 300 is realized.

[0066] Furthermore, in order to adapt the reinforcing beam 200 to the height difference between the precast staircase 300 and the different floors, and to achieve precise positioning and installation of the precast staircase 300, the step S1 of obtaining the reinforcing beam 200 and the stair beam 100, including the positioning and installation surface 210 of the reinforcing beam 200, may include the following steps:

[0067] S11: Obtain the standard floor height, differential floor height, differential floor elevation, and 320mm height of the prefabricated staircase installation section.

[0068] S12: Based on the standard floor height, the differential floor height, and the height of the prefabricated staircase installation section 320, the height of the first installation part 220 and the elevation of the second installation part 230 are calculated; wherein, the first installation part 220 and the second installation part 230 are connected to form a reinforcing beam 200, and the elevation of the second installation part 230 is the height of the positioning installation surface 210.

[0069] In this implementation scheme, the specific installation position of the reinforcing beam 200 is determined based on the height difference between the standard floor and the differential floor, that is, the height of the first installation part 220 and the elevation of the second installation part 230 are determined. It should be noted that the elevation in this scheme refers to the structural elevation, that is, the installation or construction height of the building structure relative to the starting point of the main ground floor height of the building's interior being zero.

[0070] First, the structure of the reinforcing beam 200 can be set as any possible structure mentioned above. For example, the reinforcing beam 200 is a cast-in-place concrete structure, with its first mounting part 220 arranged vertically and its second mounting part 230 arranged horizontally. The second mounting part 230 is horizontally arranged in the middle of the first mounting part 220, and both ends of the first mounting part 220 protrude from the second mounting part 230. The end of the second mounting part 230 near the precast staircase 300 protrudes from the first mounting part 220.

[0071] In this embodiment, the prefabricated staircase 300 is installed on different floors to obtain the standard floor height, the different floor height, the different floor elevation, and the height of the prefabricated staircase installation section 320.

[0072] The height of the first installation section 220 = |Differential floor height - Standard floor height| - Building surface thickness.

[0073] The elevation of the first installation section 220 = the height of the first installation section 220 + the elevation difference between floors.

[0074] The elevation of the second installation section 230 = the elevation of the first installation section 220 + the thickness of the building surface layer - the height of the prefabricated staircase installation section 320 - the preset thickness of the leveling layer 250.

[0075] The building surface layer refers to the decorative layer laid on the basic structure of a building. Its thickness depends on its application and function; in this design, applied to stairwells, the surface layer thickness can be 30mm. The leveling layer 250 refers to a structural layer that serves to level, slope, or reinforce the structure; its thickness can be 20-50mm. The preset thickness of the leveling layer 250 in this design is 20mm, set for ease of calculation.

[0076] For example, the standard floor height is 2700mm, the differential floor height is 3000mm, the differential floor elevation is 10000mm, and the height of the prefabricated staircase installation section 320 is 30mm. Then, according to the above calculation formula, the height of the first installation section 220 is 270mm, the elevation of the first installation section is 10270mm, and the elevation of the second installation section is 10250mm.

[0077] The structure of the reinforcing beam 200 provided in this solution may also have other forms, and the calculation formulas for the height of the first installation part 220 and the elevation of the second installation part 230 will also change accordingly. This solution does not limit the specific calculation formulas for the height of the first installation part 220 and the elevation of the second installation part 230, as long as the precise positioning and installation of the reinforcing beam 200 on the prefabricated staircase 300 can be achieved.

[0078] Furthermore, in order to connect the reinforcing beam 200 and the stair beam 100 into a whole structure, meet the structural strength and rigidity required for the installation of the prefabricated staircase 300, and ensure the stability of the installation of the prefabricated staircase 300, the step S2 of connecting at least a portion of the reinforcing beam 200 to the upper part of the stair beam 100 so that a height difference is maintained between the positioning mounting surface 210 of the reinforcing beam 200 and the stair beam 100 may include the following steps:

[0079] S21: Obtain the first steel reinforcement cage 221 with the same height as the first installation part 220.

[0080] S22: Obtain the second steel reinforcement cage 231.

[0081] S23: The first reinforcing steel cage 221 and the second reinforcing steel cage 231 are tied and lapped above the reinforcing steel cage 110 of the ladder beam. Vertically, the first reinforcing steel cage 221 protrudes from the second reinforcing steel cage 231. Horizontally, the second reinforcing steel cage 231 protrudes from the first reinforcing steel cage 221. The elevation of the second reinforcing steel cage 231 is the same as the elevation of the second mounting part 230.

[0082] S24: Concrete is poured for the first steel reinforcement cage 221, the second steel reinforcement cage 231 and the steel reinforcement cage 110 of the ladder beam. After the first steel reinforcement cage 221 is poured, the first installation part 220 is obtained, and after the second steel reinforcement cage 231 is poured, the second installation part 230 is obtained.

[0083] In this embodiment, a first reinforcing steel cage 221 is provided in the first mounting part 220, and a second reinforcing steel cage 231 is provided in the second mounting part 230. The reinforcement details of the first and second reinforcing steel cages 221 and 231 can be obtained through stress analysis calculations. By binding and lapping the first reinforcing steel cage 221, the second reinforcing steel cage 231, and the ladder beam reinforcing steel cage 110 together and then pouring concrete, the first mounting part 220, the second mounting part 231, and the ladder beam 100 are stably connected.

[0084] Furthermore, step S4 of this solution, which positions and installs the precast staircase 300 on the positioning mounting surface 210 so that the reinforcing beam 200 is located between the precast staircase 300 and the stair beam 100, may also include the following steps:

[0085] S41: Fill the gap between the prefabricated staircase 300 and the positioning mounting surface 210.

[0086] This step includes filling the gap reserved between the first positioning mounting surface 211 and the prefabricated staircase 300, and filling the part between the second positioning mounting surface 212 and the prefabricated staircase 300 that is not filled by the leveling layer 250.

[0087] Furthermore, the gap between the first positioning mounting surface 211 and the prefabricated staircase 300 can be filled with polystyrene, with a PE rod inserted at the top and sealed with sealant.

[0088] Furthermore, polystyrene can be used to fill and seal the portion between the second positioning mounting surface 212 and the prefabricated staircase 300 that is not filled by the leveling layer 250.

[0089] Furthermore, to achieve a smooth transition between the precast staircase 300 and the stair beam 100, and for aesthetic purposes, the installation method of the precast staircase in this scheme may also include step S5: constructing a supplementary platform stage 270. This supplementary platform stage 270 extends from the height of the different floor level to the height of the precast staircase 300. This supplementary platform stage 270 can be constructed using brick steps or by on-site casting of concrete.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A prefabricated staircase structure, characterized in that, include: Precast staircase, located above the stair beam; A reinforcing beam is located between the precast staircase and the stair beam; The reinforcing beam includes a positioning and mounting surface, and the prefabricated staircase is positioned and installed on the positioning and mounting surface and the reinforcing beam; a height difference is provided between the positioning and mounting surface and the stair beam; At least a portion of the structure of the reinforcing beam is used for connection with the ladder beam; The reinforcing beam includes a first mounting part and a second mounting part, wherein the first mounting part is anchored to the second mounting part; the first mounting part is anchored to the ladder beam; or, the second mounting part is anchored to the ladder beam. The first mounting part includes a first steel reinforcement cage, and the second mounting part includes a second steel reinforcement cage; In the vertical direction, the first steel reinforcement cage protrudes beyond the second steel reinforcement cage; Along the horizontal direction, the second steel reinforcement cage protrudes from the first steel reinforcement cage.

2. The prefabricated staircase structure according to claim 1, characterized in that, The positioning mounting surface includes a first positioning mounting surface, which is located between the first mounting part and the precast staircase. The first positioning mounting surface is provided with a plurality of first positioning steel bars, which are positioned and installed with a plurality of precast holes on the precast staircase.

3. The prefabricated staircase structure according to claim 1 or 2, characterized in that, The positioning mounting surface includes a second positioning mounting surface, which is located between the second mounting part and the prefabricated staircase. A leveling layer is provided on the second positioning mounting surface, and the prefabricated staircase is installed on the leveling layer so that the prefabricated staircase is installed on a horizontal plane.

4. The prefabricated staircase structure according to claim 3, characterized in that, A gap is left between the prefabricated staircase and the first installation part, and a filling layer is provided in the gap.

5. The prefabricated staircase structure according to claim 3, characterized in that, The second positioning mounting surface is provided with a plurality of second positioning steel bars, which are positioned and installed with a plurality of prefabricated holes on the prefabricated staircase.

6. The prefabricated staircase structure according to claim 1, characterized in that, The ladder beam includes a ladder beam steel reinforcement cage, with multiple vertical bars extending from one side of the first steel reinforcement cage. The multiple vertical bars extend into the ladder beam steel reinforcement cage and are connected to the ladder beam steel reinforcement cage.

7. The prefabricated staircase structure according to claim 1, characterized in that, The height difference between the positioning mounting surface and the ladder beam is set between 15mm and 150mm.

8. The prefabricated staircase structure according to claim 1, characterized in that, The second steel reinforcement cage includes multiple stirrups, which are arranged sequentially along the length of the second steel reinforcement cage. One side of each stirrup is inserted into the first steel reinforcement cage, and the second steel reinforcement cage is fixed to the first steel reinforcement cage by lapping the stirrups.

9. A method for installing a prefabricated staircase, characterized in that, Includes the following steps: Obtain a reinforcing beam and a ladder beam, wherein the reinforcing beam includes a positioning mounting surface; At least a portion of the structure of the reinforcing beam is connected above the ladder beam so that a height difference is maintained between the positioning mounting surface of the reinforcing beam and the ladder beam; Obtain prefabricated stairs; The prefabricated staircase is positioned and installed on the positioning and installation surface so that the reinforcing beam is located between the prefabricated staircase and the stair beam; The step of obtaining the reinforcing beam and the ladder beam, wherein the reinforcing beam includes a positioning mounting surface, includes: Obtain the standard floor height, differential floor height, differential floor elevation, and the height of the prefabricated staircase installation section; Based on the standard floor height, the differential floor height, and the height of the prefabricated staircase installation section, the height of the first installation part and the elevation of the second installation part are calculated; wherein, the first installation part and the second installation part are connected to form the reinforcing beam, and the elevation of the second installation part is the height of the positioning installation surface.

10. The installation method of the prefabricated staircase according to claim 9, characterized in that, The step of connecting at least a portion of the reinforcing beam to the upper part of the ladder beam to maintain a height difference between the positioning mounting surface of the reinforcing beam and the ladder beam includes: Obtain a first steel reinforcement cage at the same height as the first mounting part; Obtain the second steel reinforcement cage; The first and second reinforcing steel cages are tied and overlapped above the reinforcing steel cage of the ladder beam; wherein, in the vertical direction, the first reinforcing steel cage protrudes and is installed on the second reinforcing steel cage; in the horizontal direction, the second reinforcing steel cage protrudes and is installed on the first reinforcing steel cage, and the elevation of the second reinforcing steel cage is the elevation of the second mounting part; Concrete is poured into the first steel reinforcement cage, the second steel reinforcement cage, and the steel reinforcement cage of the ladder beam. After pouring, the first steel reinforcement cage becomes the first installation part, and after pouring concrete, the second steel reinforcement cage becomes the second installation part.

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