Connecting structure of assembly type stair and steel beam

Abstract

The utility model discloses a connecting structure of an assembly type stair and a steel beam. The connecting structure comprises a prefabricated stair flight plate assembly, a floor slab, an H-shaped steel beam and at least two bracket plates arranged at intervals. The prefabricated stair flight plate assembly comprises a stair flight plate; the floor slab is connected with the end part of the stair flight plate; the upper flange of the H-shaped steel beam is fixedly connected with the bottom of the floor slab; one ends of at least two bracket plates arranged at intervals are fixedly connected to the side, close to the stair flight plate, of a web of the H-shaped steel beam, the other ends of the bracket plates are arranged in the direction away from the floor, the distance between the tops of the bracket plates and the top of the floor is equal to the thickness of the ends of the stair flight plates, and the ends of the stair flight plates are in lap joint with the bracket plates. And the top of the stair flight plate is flush with the top of the floor slab. When the stair flight plate is thicker than the floor slab, compared with the mode that the stair flight plate is lapped on the steel beam, a base plate does not need to be additionally arranged on one side of the floor slab to level the height difference, the follow-up link about base plate construction is omitted, and factors needing to be considered in construction are reduced.

Description

Technical Field

[0001] The utility model relates to the field of building construction, in particular to a connecting structure between a prefabricated staircase and a steel beam. Background Technique

[0002] The application field of steel structures in buildings has gradually expanded from factory buildings to residential buildings, schools, hospitals, hotels, office buildings, etc. Correspondingly, the original relatively low decoration standards can no longer meet the requirements of newly applied buildings. For example, the steel staircase often used in matching with the main steel structure in factory building construction is not often selected in steel structure residential buildings and other buildings because of its poor appearance, poor experience during use, easy rusting and other disadvantages. Traditional cast-in-place concrete staircases and prefabricated assembled staircases respectively have the disadvantages of slow construction speed, poor forming effect and relatively immature construction connection nodes.

[0003] The existing connection nodes between prefabricated assembled staircases and steel beams refer to the connection node practices between prefabricated staircases and concrete beams. The prefabricated staircase is directly placed on the steel beam surface, fixed to the steel beam by bolts at the hinged end, and the reserved holes are blocked by grouting material and mortar successively; at the sliding end, it is fixed to the steel beam by bolts and large-diameter gaskets, and then blocked by mortar. This method not only has relatively cumbersome construction procedures, but also when the thickness of the stair slab is greater than that of the adjacent floor slab, in order to ensure the surface flatness here, it is necessary to add a backing plate on the side of the thin slab to process the height difference, and there are many factors to be considered in construction. Content of the Utility Model

[0004] To solve the problems in the prior art, the utility model provides a connecting structure between a prefabricated staircase and a steel beam.

[0005] The utility model discloses a connecting structure between a prefabricated staircase and a steel beam, including:

[0006] A prefabricated stair section plate assembly, including a stair section plate;

[0007] A floor slab, connected to the end of the stair section plate;

[0008] An H-shaped steel beam, the upper flange of the H-shaped steel beam is fixedly connected to the bottom of the floor slab;

[0009] At least two spaced corbel plates, one end of which is fixedly connected to the side of the web of the H-shaped steel beam close to the stair section plate, the other end of the corbel plate is arranged away from the floor slab, and the distance between the top of the corbel plate and the top of the floor slab is equal to the thickness of the end of the stair section plate, and the end of the stair section plate is lapped on the corbel plate so that the top of the stair section plate is flush with the top of the floor slab.

[0010] In some embodiments, the connection structure further includes a limiting plate assembly, and the limiting plate assembly includes a first limiting plate welded to the top of the bracket plate; the precast stair slab assembly further includes an embedded angle steel provided at the end of the stair slab, and the embedded angle steel is welded to the first limiting plate.

[0011] In some embodiments, the precast stair slab assembly further includes a limiting square pipe, the limiting plate assembly further includes a second limiting plate welded to the top of the bracket plate, and the second limiting plate is arranged at an interval from the first limiting plate. The limiting square pipe is welded to the bottom of the embedded angle steel. The length of the limiting square pipe is less than the distance between two adjacent bracket plates, and the width of the limiting square pipe is less than the distance between the second limiting plate and the first limiting plate, so that the limiting square pipe is arranged between the intervals of the second limiting plate and the first limiting plate.

[0012] In some embodiments, one end of the upper flange of the H-shaped steel beam is flush with the end of the floor slab, and the first limiting plate is arranged opposite to the end of the floor slab.

[0013] In some embodiments, the length of the embedded angle steel is greater than the distance between two adjacent bracket plates.

[0014] In some embodiments, the bottom width of the embedded angle steel is greater than the distance between the second limiting plate and the first limiting plate.

[0015] In some embodiments, each H-shaped steel beam is connected to the upward stair slab and the downward stair slab. Two sets of the bracket plates are arranged on the H-shaped steel beam corresponding to each stair slab, and each set of bracket plates includes two bracket plates arranged at an interval.

[0016] In some embodiments, the connection structure further includes a stiffening plate, and the stiffening plate is fixedly connected to the side of the web of the H-shaped steel beam away from the stair slab, and the stiffening plate is arranged opposite to the bracket plate.

[0017] In some embodiments, the connection structure further includes stud bolts, and the upper flange of the H-shaped steel beam is fixedly connected to the floor slab through the stud bolts.

[0018] In some embodiments, the connection structure further includes a filler for filling the gap between the stair slab and the floor slab.

[0019] Advantages of the present utility model: A connecting structure between a prefabricated staircase and a steel beam disclosed by the present utility model, by arranging a corbel plate on one side of the web of the H-shaped steel beam close to the stair tread plate, the other end of the corbel plate is arranged in a direction away from the floor slab, and the distance between the top of the corbel plate and the top of the floor slab is equal to the thickness of the end of the stair tread plate, and the end of the stair tread plate is lapped on the corbel plate so that the top of the stair tread plate is flush with the top of the floor slab. When the stair tread plate is thicker than the floor slab, compared with lapping the stair tread plate on the steel beam, there is no need to add a backing plate on one side of the floor slab to level the height difference, and the subsequent construction links related to the backing plate are also omitted, reducing the factors to be considered in the construction. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic diagram of the connecting structure between the prefabricated staircase and the steel beam in the background art;

[0022] Figure 2 Schematic cross-sectional view of the connecting structure between the prefabricated staircase and the steel beam provided by the embodiment of the present utility model;

[0023] Figure 3 Another schematic cross-sectional view of the connecting structure between the prefabricated staircase and the steel beam provided by the embodiment of the present utility model;

[0024] Figure 4 For Figure 2 Enlarged schematic view of the partial A of the connecting structure between the prefabricated staircase and the steel beam shown.

[0025] Reference numerals in the drawings: 1, precast stair tread plate assembly; 11, stair tread plate; 12, embedded angle steel; 13, limiting square tube; 2, floor slab; 3, H-shaped steel beam; 4, corbel plate; 5, limiting plate assembly; 51, first limiting plate; 52, second limiting plate; 6, stiffening plate; 7, stud; 8, filler; 81, polystyrene board; 82, PE rod; 83, injected glue. Detailed Description of the Embodiment

[0026] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0028] It should also be noted that, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", "setting", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located above the other element, or there may also be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. can explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] It should also be understood that the terms used in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. As used in the specification of the present utility model and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0030] It should be further understood that the term "and / or" used in the specification of the present utility model and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0031] Figure 1 It is a schematic diagram of the connection structure between a prefabricated staircase and a steel beam in the background art; Figure 2A cross-sectional schematic diagram of the connection structure between the prefabricated staircase and the steel beam provided by the embodiment of the present utility model; Figure 3 Another cross-sectional schematic diagram of the connection structure between the prefabricated staircase and the steel beam provided by the embodiment of the present utility model; Figure 4 is Figure 2 An enlarged schematic diagram of the partial area A of the connection structure between the prefabricated staircase and the steel beam shown;

[0032] Refer to together Figure 2 and Figure 3 and, the embodiment of the present utility model discloses a connection structure between a prefabricated staircase and a steel beam, including a prefabricated staircase slab assembly 1, a floor slab 2, an H-shaped steel beam 3, and at least two spaced corbel plates 4. The prefabricated staircase slab assembly 1 includes a staircase slab 11; the floor slab 2 is connected to the end of the staircase slab 11; the upper flange of the H-shaped steel beam 3 is fixedly connected to the bottom of the floor slab 2; one end of the corbel plate 4 is fixedly connected to one side of the web of the H-shaped steel beam 3 close to the staircase slab 11, the other end of the corbel plate 4 is arranged in a direction away from the floor slab 2, and the distance between the top of the corbel plate 4 and the top of the floor slab 2 is equal to the thickness of the end of the staircase slab 11, and the end of the staircase slab 11 is lapped on the corbel plate 4 so that the top of the staircase slab 11 is flush with the top of the floor slab 2.

[0033] Specifically, the flight slab 11 is a precast reinforced concrete slab. The floor slab 2 can be a floor slab connected to the flight slab 11 or a landing slab between two flights of stairs. The upper flange of the H-shaped steel beam 3 is fixedly connected to the bottom of the floor slab 2. During on-site construction, the H-shaped steel beam 3 can be assembled first, and then the floor slab 2 can be fixed on the top of the H-shaped steel beam 3. One end of the bracket plate 4 can be fixedly connected to the web of the H-shaped steel beam 3 on the side close to the flight slab 11 by welding. The other end of the bracket plate 4 is arranged in the direction away from the floor slab 2, that is, the bracket plate 4 is arranged between the upper flange and the lower flange of the H-shaped steel beam 3. Its bottom edge is shorter and its top edge is longer. The length of its bottom edge can just be equal to the distance from the web of the H-shaped steel beam 3 to the edge of the lower flange. When welding one end of the bracket plate 4 to the web of the H-shaped steel beam 3 on the side close to the flight slab 11, its bottom edge can also be welded to the lower flange of the H-shaped steel beam 3 to make the connection between the bracket plate 4 and the H-shaped steel beam 3 more stable. At the same time, it also makes the support of the H-shaped steel beam 3 for the flight slab 11 more stable. And the length of the top edge of the bracket plate 4 is greater than the distance from the web of the H-shaped steel beam 3 to the edge of the upper flange, so that the flight slab 11 can be lapped on the top edge of the bracket plate 4 protruding from the upper flange of the H-shaped steel beam 3. That is, in the present utility model, the flight slab 11 is indirectly connected to the H-shaped steel beam 3 through the connection with the bracket plate 4, and then connected to the floor slab 2. Thus, without increasing the flange size of the H-shaped steel beam 3, the effective support range of the H-shaped steel beam 3 is expanded. The H-shaped steel beam 3 needs to span the entire staircase, and its span is relatively long, while the bracket plates 4 only need to be arranged at intervals. Therefore, compared with increasing the flange size of the H-shaped steel beam 3, setting the bracket plates 4 can reduce the steel consumption and save the construction cost.

[0034] Moreover, the distance between the top of the bracket plate 4 and the top of the floor slab 2 is equal to the thickness of the end of the flight slab 11, which can make the top of the flight slab 11 flush with the top of the floor slab 2 when the end of the flight slab 11 is lapped on the bracket plate 4. That is, when the thickness of the end of the flight slab 11 is greater than the thickness of the floor slab 2, the thickness of the end of the flight slab 11 and the thickness of the floor slab 2 can be calculated first, and then the bracket plates 4 with different heights can be processed according to their thickness difference. Since it is very difficult to adjust the thickness of the flight slab 11 and the floor slab 2 during on-site construction, and the height adjustment of the bracket plate 4 is simpler and more convenient for construction. When the flight slab 11 is thicker than the floor slab 2, compared with lapping the flight slab 11 on the steel beam, the present utility model does not need to add a cushion plate on one side of the floor slab 2 to level the height difference, and also omits the subsequent construction link of the cushion plate, reducing the factors to be considered in construction.

[0035] Refer to together Figure 2 and Figure 3, in some embodiments, the connection structure further includes a limit plate assembly 5, and the limit plate assembly 5 includes a first limit plate 51 welded to the top of the bracket plate 4; the precast stair section plate assembly 1 further includes a pre-embedded angle steel 12 provided at the end of the stair section plate 11, and the pre-embedded angle steel 12 is welded to the first limit plate 51.

[0036] Specifically, the first limit plate 51 can be welded to the tops of two adjacent bracket plates 4, and the bracket plates 4 are arranged in parallel. The pre-embedded angle steel 12 is arranged at the position where the stair section plate 11 needs to overlap with the bracket plate 4. When formwork is set for the stair section plate 11, the pre-embedded angle steel 12 is preset in the formwork of the stair section plate 11, so that after the concrete of the stair section plate 11 is formed and the formwork is removed, the pre-embedded angle steel 12 and the stair section plate 11 are fixedly connected as a whole. During on-site construction, the precast stair section plate assembly 1 is hoisted onto the bracket plate 4, and the pre-embedded angle steel 12 and the first limit plate 51 are welded. Among them, the pre-embedded angle steels 12 at the upper and lower ends of the stair section plate 11 are welded to the corresponding first limit plates 51 on the bracket plate 4, so as to fix the stair section plate 11 on the bracket plate 4. It avoids the cumbersome construction procedures of directly placing the precast staircase on the steel beam surface, fixing it to the steel beam with bolts, and successively using grouting material and mortar to seal the reserved holes.

[0037] Refer to together Figure 2 and Figure 3 , in some embodiments, the precast stair section plate assembly 1 further includes a limit square pipe 13, the limit plate assembly 5 further includes a second limit plate 52 welded to the top of the bracket plate 4, and the second limit plate 52 is arranged at an interval from the first limit plate 51. The limit square pipe 13 is welded to the bottom of the pre-embedded angle steel 12. The length of the limit square pipe 13 is less than the distance between two adjacent bracket plates 4, and the width of the limit square pipe 13 is less than the distance between the second limit plate 52 and the first limit plate 51, so that the limit square pipe 13 is arranged between the intervals of the second limit plate 52 and the first limit plate 51.

[0038] In this embodiment, the second limiting plate 52 is arranged at an interval from the first limiting plate 51. The second limiting plate 52 can be arranged at the top of the bracket plate 4 away from one end of the H-shaped steel beam 3, and the first limiting plate 51 is closer to the H-shaped steel beam 3 than the second limiting plate 52. The precast stair slab assembly 1 further includes a limiting square pipe 13, which is used to cooperate with the second limiting plate 52 and the first limiting plate 51 to facilitate the positioning and limiting of the stair slab 11 when the stair slab 11 is lapped. After the formwork of the stair slab 11 is removed, the limiting square pipe 13 is welded to the bottom of the embedded angle steel 12. The length of the limiting square pipe 13 is less than the distance between two adjacent bracket plates 4, and the width of the limiting square pipe 13 is less than the distance between the second limiting plate 52 and the first limiting plate 51, so that the limiting square pipe 13 can be arranged between the intervals of the second limiting plate 52 and the first limiting plate 51. When the stair slab 11 is lapped with the bracket, the limiting square pipe 13 can be first placed between the intervals of the second limiting plate 52 and the first limiting plate 51 and the intervals of two adjacent bracket plates 4. At this time, the position of the stair slab 11 is basically aligned with that of the floor slab 2, playing a role of positioning. Moreover, by placing the limiting square pipe 13 between the intervals of the second limiting plate 52 and the first limiting plate 51 and the intervals of two adjacent bracket plates 4, and limiting the limiting square pipe 13 by the first limiting plate 51, the second limiting plate 52 and two adjacent bracket plates 4, the stair slab 11 can be prevented from shifting.

[0039] Refer to together Figure 2 and Figure 3 , in some embodiments, one end of the upper flange of the H-shaped steel beam 3 is flush with the end of the floor slab 2, and the first limiting plate 51 is arranged opposite to the end of the floor slab 2.

[0040] Specifically, one end of the upper flange of the H-shaped steel beam 3 is flush with the end of the floor slab 2, and the first limiting plate 51 is arranged opposite to the end of the floor slab 2, that is, the first limiting plate 51 is also arranged opposite to one end of the upper flange of the H-shaped steel beam 3. Since the stair slab 11 of the present utility model is lapped on the bracket plate 4 instead of on the upper flange of the H-shaped steel beam 3, the upper flange of the H-shaped steel beam 3 does not need to protrude beyond the edge of the floor slab 2, and one end of the upper flange of the H-shaped steel beam 3 is flush with the end of the floor slab 2, which is more convenient for construction. The first limiting plate 51 is arranged opposite to the end of the floor slab 2, that is, when viewed from the side, the two ends of the first limiting plate 51 are respectively located inside and outside the end of the floor slab 2. The part of the first limiting plate 51 located outside the end of the floor slab 2 can be used for welding with the embedded angle steel 12, and when filling the gap between the end of the stair slab 11 and the end of the floor slab 2, the part of the first limiting plate 51 located outside the end of the floor slab 2 can also be used as the bottom support of the filler 8.

[0041] Refer to together Figure 2 and Figure 3 , in some embodiments, the length of the embedded angle steel 12 is greater than the distance between two adjacent bracket plates 4.

[0042] In this embodiment, the length of the embedded angle steel 12 is greater than the distance between two adjacent bracket plates 4, so that the first limiting plate 51 welded to the top of the bracket plate 4 can completely contact the limiting square pipe 13 in its length direction, thereby ensuring that there is enough weld length between the two and improving the welding firmness.

[0043] Refer to Figure 2 and Figure 3 , in some embodiments, the bottom width of the embedded angle steel 12 is greater than the distance between the second limiting plate 52 and the first limiting plate 51.

[0044] In this embodiment, the bottom side of the embedded angle steel 12 is the side that contacts the first limiting plate 51. The bottom width of the embedded angle steel 12 is greater than the distance between the second limiting plate 52 and the first limiting plate 51, that is, the distance between the second limiting plate 52 and the first limiting plate 51 is less than the bottom width of the embedded angle steel 12, which can make the bottom side of the embedded angle steel 12 contact the first limiting plate 51 and the second limiting plate 52 at the same time, and can reduce the movement range of the limiting square pipe 13, so as to meet the requirements of the limiting range of the limiting square pipe 13 by the first limiting plate 51 and the second limiting plate 52. In this embodiment, the embedded angle steel 12 is only welded to the first limiting plate 51 to simplify the construction process. It can be understood that the embedded angle steel 12 can also be welded to the first limiting plate 51 and the second limiting plate 52 at the same time to improve the connection stability between the embedded angle steel 12 and the bracket plate 4.

[0045] Refer to Figure 2 and Figure 3 , in some embodiments, each H-shaped steel beam 3 is connected to the upward flight slab 11 and the downward flight slab 11. Two groups of bracket plates 4 are arranged on the H-shaped steel beam 3 corresponding to each flight slab 11, and each group of bracket plates 4 includes two bracket plates 4 arranged at intervals.

[0046] Specifically, each H-shaped steel beam 3 is connected to the upward flight slab 11 and the downward flight slab 11. Here, "upward" and "downward" refer to: taking the floor slab 2 connected to the H-shaped steel beam 3 as the target, the flight slab 11 that a person can walk upward to this floor slab 2 is the upward flight slab 11, and the flight slab 11 that a person can walk downward to this floor slab 2 is the downward flight slab 11. The upper end of the upward flight slab 11 is connected to this floor slab, and the lower end of the downward flight slab 11 is connected to this floor slab. Hereinafter, the upward flight slab 11 and the downward flight slab 11 connected to the same floor slab or the same H-shaped steel beam 3 are referred to as adjacent flight slabs 11. Two sets of corbel plates 4 are welded on the H-shaped steel beam 3 corresponding to each flight slab 11. Each set of corbel plates 4 includes two corbel plates 4 arranged at intervals, and the above-mentioned first limiting plate 51 and second limiting plate 52 are welded on the two sets of corbel plates 4 respectively. And two embedded angle steels 12 are correspondingly arranged for each flight slab 11, and each embedded angle steel 12 corresponds to a set of corbel plates 4. The height of the corbel plates 4 corresponding to the adjacent flight slabs 11 can be set according to the thickness difference between each flight slab 11 and the floor slab 2. Compared with overlapping the adjacent flight slabs 11 on the H-shaped steel beam 3 in the same way, the embodiment of the present utility model can avoid the construction steps of adding pads or the like to eliminate the height difference on the side of the thinner flight slab 11 in order to ensure the surface flatness at this node when the adjacent flight slabs 11 have different thicknesses.

[0047] Refer to together Figure 2 and Figure 3 , in some embodiments, the connection structure further includes a stiffening plate 6. The stiffening plate 6 is fixedly connected to the side of the web of the H-shaped steel beam 3 away from the flight slab 11, and the stiffening plate 6 is arranged opposite to the corbel plate 4.

[0048] In this embodiment, the stiffening plate 6 is fixedly connected to the side of the web of the H-shaped steel beam 3 away from the flight slab 11, that is, the stiffening plate 6 and the corbel plate 4 are respectively welded on both sides of the web of the H-shaped steel beam 3; the stiffening plate 6 is arranged opposite to the corbel plate 4, that is, the stiffening plate 6 is arranged opposite to the corbel plate 4 in terms of position and quantity. The height of the corbel plate 4 is adjusted according to the thickness difference between the flight slab 11 and the floor slab 2, and the height of the stiffening plate 6 is equal to the distance between the upper and lower flanges of the H-shaped steel beam 3, that is, its top and bottom respectively abut against the upper and lower flanges of the H-shaped steel beam 3. The width of the stiffening plate 6 is also equal to the distance between the web of the H-shaped steel beam 3 and the end of its flange. The stiffening plate 6 is used to enhance the support strength of the H-shaped steel beam 3 so that it can stably support the floor slab 2 and the flight slab 11.

[0049] Refer to together Figure 2 and Figure 3 , in some embodiments, the connection structure further includes a stud 7. The upper flange of the H-shaped steel beam 3 is fixedly connected to the floor slab 2 through the stud 7.

[0050] Specifically, the upper flange of the H-shaped steel beam 3 and the floor slab 2 are fixedly connected, either by assembling the floor slab 2 and the H-shaped steel beam 3 after the H-shaped steel beam 3 is assembled at the construction site, or by assembling the floor slab 2 and the H-shaped steel beam 3 first.

[0051] Read also Figure 4 In some embodiments, the connection structure further includes a filler 8 for filling the gap between the stair slab 11 and the floor slab 2 .

[0052] Specifically, the filler 8 of the gap between the stair section plate 11 and the floor slab 2 is used to fill the gap to make the node flat, and on the other hand, it can also further connect the stair section plate 11 and the floor slab 2 to improve the integrity of the structure. The filler 8 may include a polystyrene board 81, a PE rod 82 (polyethylene rod) and an injection glue 83.

[0053] The utility model has at least the following beneficial effects:

[0054] This technology has made a significant improvement on the existing connection node method of prefabricated stairs and steel beams. By adjusting the top elevation of the corbel plate 4, it can flexibly adapt to the conditions of stairs with different thicknesses of the stair section plate 11;

[0055] By welding the embedded angle steel 12 and the first limit plate 51, conventional bolt connection, grouting and mortar sealing are avoided, which greatly simplifies the on-site construction process, reduces the requirements for the mold of the prefabricated staircase, and makes the connection node force more clear and reliable;

[0056] By providing the limiting square passage 13 and the first limiting plate 51 and the second limiting plate 52 , clamping the limiting square passage 13 between the first limiting plate 51 and the second limiting plate 52 , and cooperating with the corbel plate 4 , the limiting of the prefabricated stair section plate 11 is achieved.

[0057] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A connecting structure between a prefabricated staircase and a steel beam, characterized in that, Comprising: A precast stair slab assembly, including a stair slab; A floor slab, connected to the end of the stair slab; An H-shaped steel beam, the upper flange of the H-shaped steel beam being fixedly connected to the bottom of the floor slab; At least two spaced corbel plates, one end fixedly connected to the side of the web of the H-shaped steel beam close to the stair slab, the other end of the corbel plate being arranged in a direction away from the floor slab, and the distance between the top of the corbel plate and the top of the floor slab being equal to the thickness of the end of the stair slab, the end of the stair slab being lapped on the corbel plate so that the top of the stair slab is flush with the top of the floor slab.

2. The connecting structure between the prefabricated staircase and the steel beam according to claim 1, wherein The connection structure further includes a limit plate assembly, the limit plate assembly including a first limit plate welded to the top of the corbel plate; the precast stair slab assembly further includes a buried angle steel arranged at the end of the stair slab, and the buried angle steel is welded to the first limit plate.

3. The connecting structure between the prefabricated staircase and the steel beam according to claim 2, characterized in that, The precast stair slab assembly further includes a limit square pipe, the limit plate assembly further includes a second limit plate welded to the top of the corbel plate, and the second limit plate is spaced from the first limit plate, the limit square pipe is welded to the bottom of the buried angle steel, the length of the limit square pipe is less than the distance between two adjacent corbel plates, and the width of the limit square pipe is less than the distance between the second limit plate and the first limit plate, so that the limit square pipe is arranged between the intervals of the second limit plate and the first limit plate.

4. The connecting structure between the prefabricated staircase and the steel beam according to claim 2 or 3, characterized in that, One end of the upper flange of the H-shaped steel beam is flush with the end of the floor slab, and the first limit plate is arranged opposite to the end of the floor slab.

5. The connecting structure between the prefabricated staircase and the steel beam according to claim 2 or 3, characterized in that The length of the buried angle steel is greater than the distance between two adjacent corbel plates.

6. The connecting structure between the prefabricated staircase and the steel beam according to claim 3, characterized in that, The bottom width of the buried angle steel is greater than the distance between the second limit plate and the first limit plate.

7. The connecting structure between the prefabricated staircase and the steel beam according to claim 1, characterized in that, Each H-shaped steel beam is connected to the upward stair slab and the downward stair slab, and two sets of the corbel plates are arranged on the H-shaped steel beam corresponding to each stair slab, and each set of corbel plates includes two spaced corbel plates.

8. The connecting structure between the prefabricated staircase and the steel beam according to claim 1, characterized in that, The connection structure further includes a stiffening plate, the stiffening plate being fixedly connected to the side of the web of the H-shaped steel beam away from the stair slab, and the stiffening plate being arranged opposite to the corbel plate.

9. The connecting structure between the prefabricated staircase and the steel beam according to claim 1, characterized in that, The connection structure further includes stud bolts, and the upper flange of the H-shaped steel beam is fixedly connected to the floor slab through the stud bolts.

10. The connecting structure between the prefabricated staircase and the steel beam according to claim 1, characterized in that, The connection structure further includes a filler for filling the gap between the stair slab and the floor slab.

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