UHPC step combined steel ladder

Abstract

The utility model discloses a UHPC step combined steel ladder which comprises two parallel steel beams and UHPC steps, the UHPC steps are fixed between the two steel beams through a connecting assembly, the connecting assembly comprises two platform steel plates and two supporting steel plates, and the platform steel plates and the supporting steel plates are fixedly connected with the steel beams on the two sides respectively. The top of the supporting steel plate is fixedly connected and welded with the bottom of the platform steel plate, and the platform steel plate is detachably connected with the UHPC step. The mode that the platform steel plate and the supporting steel plate are combined is adopted for supporting the UHPC step, so that the supporting structure is more stable, and the use standard can be met with less steel. UHPC (ultra-high performance concrete) is selected as a step material, and components can be designed to be lighter and thinner due to the high-strength and high-durability properties of the UHPC, so that the self weight of the stair is lighter, the step can be more durable in use, and the comfort level is higher compared with that of a steel step. The platform steel plates are detachably connected with the UHPC steps, so that the UHPC step combined steel ladder is more convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model belongs to the technical field of stairs, and in particular relates to a UHPC step combined steel ladder. Background Art

[0002] The more common staircases are concrete stairs and steel stairs. Concrete stairs can be cast after supporting the formwork and tying the steel bars on the construction site, or they can be prefabricated in the factory and then installed on site. The main structure of steel stairs is made of steel, including steel beams, steel plates, steel handrails and other components. These stairs usually need to be welded or bolted on site, and then painted or rust-proofed.

[0003] Concrete stairs usually need to be constructed on site, and the construction time is long. In addition, ordinary concrete has low strength and is heavy overall. Steel stairs are noisy and vibrate significantly when used. At present, stairs that combine concrete and steel have also appeared on the market, but they still have the disadvantages of being heavy and requiring a large amount of steel for support. Utility Model Content

[0004] The utility model provides a UHPC step combination steel ladder, which has the effects of reducing the amount of steel used while ensuring the structural strength, reducing the weight of the stairs, facilitating installation, reducing noise and increasing comfort. The specific technical solution is as follows:

[0005] A UHPC step combined steel ladder comprises two parallel steel beams and a UHPC step, wherein the UHPC step is fixed between the two steel beams through a connecting assembly, wherein the connecting assembly comprises a platform steel plate and a supporting steel plate, wherein the platform steel plate and the supporting steel plate are respectively fixedly connected to the steel beams, wherein the top of the supporting steel plate is fixedly connected to the bottom of the platform steel plate, and the platform steel plate is detachably connected to the UHPC step.

[0006] Through the above technical solution, a combination of platform steel plates and support steel plates is used to support the UHPC steps, making the support structure more stable and meeting the use standards with less steel. UHPC is selected as the step material. Its high strength and high durability can make the components lighter and thinner, making the stairs lighter and more durable. The platform steel plate is detachably connected to the UHPC steps, making the disassembly and assembly of the UHPC step combination steel ladder more convenient. Using UHPC as the steps is conducive to reducing noise and increasing comfort during use.

[0007] Preferably, the support steel plate has a right triangle cross section, wherein a plane where one right-angled side is located is fixedly connected to the side surface of the steel beam, and a plane where the other right-angled side is located is fixedly connected to the bottom surface of the platform steel plate.

[0008] Through the above technical solution, only a small amount of steel is needed to support the steel plate, which can greatly improve the installation stability and load-bearing capacity of the platform steel plate.

[0009] Preferably, the platform steel plate is perpendicular to the steel beam, and the length of the platform steel plate in the direction perpendicular to the steel beam is 60-200 mm.

[0010] Through the above technical solution, the length of the platform steel plate is shorter, which is more convenient for transportation and installation.

[0011] Preferably, the steel beam is an "I"-shaped, asymmetric "I"-shaped or "]"-shaped channel steel, and the platform steel plate is a "]"-shaped channel steel or a flat steel plate.

[0012] Through the above technical solution, while ensuring the structural strength, the use of steel is further saved, and the dead weight of the stairs is further reduced.

[0013] Preferably, the UHPC step is an "L"-shaped UHPC step, and the "L"-shaped UHPC step includes a transverse pedal and a longitudinal baffle, the transverse pedal is detachably connected to the platform steel plate, the longitudinal baffle is integrally formed with the transverse pedal, and the longitudinal baffle is located above the transverse pedal.

[0014] Through the above technical solution, when in use, the wider horizontal surface of the UHPC step bears the tensile force, and the narrower vertical surface of the UHPC step bears the pressure. Since the compressive performance of UHPC ultra-high performance concrete is significantly better than the tensile performance, compared with the steps set in an inverted "L", under the condition of meeting the same performance requirements, the UHPC steps of this technical solution can be made thinner and lighter. The longitudinal baffle and the transverse pedal are integrally formed, so that the longitudinal baffle and the transverse pedal are seamlessly connected, which can prevent dust or corridor garbage from getting stuck in the corners and gaps, and facilitate the cleaning of the stairs.

[0015] Preferably, the UHPC step is fixedly connected to the platform steel plate by bolts, a countersunk hole is provided on the transverse pedal, a through hole is provided on the platform steel plate, and the bolt passes through the countersunk hole and the through hole in sequence to be threadedly connected with a nut.

[0016] Through the above technical solution, the UHPC steps are fixed to the platform steel plate by bolts, making the UHPC steps easier to disassemble and assemble.

[0017] Preferably, the platform steel plate and the support steel plate are respectively connected to the steel beam by welding, and the top of the support steel plate is connected to the bottom of the platform steel plate by welding.

[0018] Through the above technical solution, the connection method between the platform steel plate and the supporting steel plate and the steel beam, and the connection method between the supporting steel plate and the platform steel plate are all welded, making the connection between them more stable. The supporting steel plate has a triangular cross-section, has stronger structural stability, and can save steel consumption.

[0019] Preferably, a flexible seismic isolation and leveling rubber pad is provided between the UHPC step and the platform steel plate.

[0020] Through the above technical solution, the noise generated by the stairs during use is reduced and the comfort of use is improved.

[0021] The beneficial effects of the utility model are:

[0022] 1. The combination of platform steel plate and support steel plate makes the support structure more stable and reduces the practical amount of steel.

[0023] 2. The platform steel plate is detachably connected to the UHPC step, which makes the disassembly and assembly of the UHPC step combined steel ladder more convenient.

[0024] 3. The UHPC steps are set in an "L" shape. Compared with the steps set in an inverted "L", the load-bearing capacity is more reasonable and can be made thinner and lighter. The longitudinal baffle and the transverse pedal are seamlessly connected to prevent dust or corridor garbage from getting stuck in the corners and gaps, making it easier to clean the stairs.

[0025] 4. UHPC steps are used instead of steel steps, which have better durability and better comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0027] Figure 1 It is a structural schematic diagram of Example 1;

[0028] Figure 2 This is a schematic diagram of the structure after the platform steel plate and the supporting steel plate are installed on the steel beam;

[0029] Figure 3 Installation diagram of supporting steel plate, platform steel plate and UHPC steps;

[0030] 1. Steel beam, 2. UHPC step, 21. Horizontal pedal, 22. Longitudinal baffle, 23. Countersunk hole, 31. Platform steel plate, 32. Support steel plate, 33. Through hole. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the drawings of the specification. In the following description, many specific details are set forth to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] UHPC stands for ultra-high performance concrete, which is an existing material. This application uses UHPC to make treads, which has excellent strength and durability and can withstand high loads and frequent use, which makes the stairs more stable and durable. UHPC is stronger, and can be thinner and lighter with the same strength requirements. It uses less material and is lighter overall, making it easier to carry and install. The overall lightweight design also reduces the load on the building. UHPC is durable and corrosion-resistant, and the maintenance cost of the combined staircase is relatively low, and does not require frequent repairs or replacements. The surface of the treads made of UHPC is smoother, more elegant, and more beautiful.

[0034] Example 1

[0035] like Figure 1-3 As shown, a UHPC step combination steel ladder includes two parallel steel beams 1 and UHPC steps 2. The steel beam 1 in this embodiment adopts a "]"-shaped channel steel. The UHPC step 2 is fixed between the two steel beams 1 through a connecting assembly. The connecting assembly includes a platform steel plate 31 and a support steel plate 32. The platform steel plate 31 in this embodiment adopts a "]"-shaped channel steel rotated 90° and arranged with a flat surface facing upward. The cross-section of the support steel plate 32 in this embodiment is a right-angled triangle, in which the plane where one of the right-angled sides is located is welded to the side of the steel beam 1, and the plane where the other right-angled side is located is welded to the bottom surface of the platform steel plate 31. The platform steel plate 31 is vertically welded to the side of the steel beam 1, and the length of the platform steel plate 31 in the direction perpendicular to the steel beam 1 can be selected between 100-200mm as needed.

[0036] The UHPC step 2 is an "L"-shaped UHPC step, which includes a transverse step 21 and a longitudinal baffle 22. The transverse step 21 is detachably connected to the platform steel plate 31, and the longitudinal baffle 22 is integrally formed with the transverse step 21, and the longitudinal baffle 22 is located above the transverse step 21.

[0037] The platform steel plate 31 is connected to the UHPC step 2 by bolts. Specifically, a countersunk hole 23 is provided on the transverse pedal 21, and a through hole 33 is provided on the platform steel plate 31. The bolt passes through the countersunk hole 23 and the through hole 33 in sequence and is threadedly connected with the nut. A flexible seismic isolation and leveling rubber pad is provided between the UHPC step and the platform steel plate to reduce the noise generated by the stairs during use and improve the comfort of use.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A UHPC step combined steel ladder, characterized by: The invention comprises two parallel steel beams (1) and a UHPC step (2), wherein the UHPC step (2) is fixed between the two steel beams (1) via a connecting assembly, wherein the connecting assembly comprises a platform steel plate (31) and a supporting steel plate (32), wherein the platform steel plate (31) and the supporting steel plate (32) are respectively fixedly connected to the steel beam (1), the top of the supporting steel plate (32) is fixedly connected to the bottom of the platform steel plate (31), and the platform steel plate (31) is detachably connected to the UHPC step (2).

2. The UHPC step combined steel ladder according to claim 1, characterized in that: The cross section of the supporting steel plate (32) is a right triangle, wherein the plane where one right-angled side is located is fixedly connected to the side surface of the steel beam (1), and the plane where the other right-angled side is located is fixedly connected to the bottom surface of the platform steel plate (31).

3. The UHPC step combined steel ladder according to claim 1, characterized in that: The platform steel plate (31) is perpendicular to the steel beam (1), and the length of the platform steel plate (31) in the direction perpendicular to the steel beam (1) is 60-200 mm.

4. The UHPC step combined steel ladder according to claim 1, characterized in that: The steel beam (1) is an I-shaped, asymmetric I-shaped or ]-shaped channel steel, and the platform steel plate (31) is a ]-shaped channel steel or a flat steel plate.

5. The UHPC step combined steel ladder according to claim 1, characterized in that: The UHPC step (2) is an "L"-shaped UHPC step, comprising a transverse pedal (21) and a longitudinal baffle (22), wherein the transverse pedal (21) is detachably connected to a platform steel plate (31), the longitudinal baffle (22) and the transverse pedal (21) are integrally formed, and the longitudinal baffle (22) is located above the transverse pedal (21).

6. The UHPC step combined steel ladder according to claim 5, characterized in that: The UHPC step (2) is fixedly connected to the platform steel plate (31) by bolts, the transverse step (21) is provided with a countersunk hole (23), the platform steel plate (31) is provided with a through hole (33), and the bolt passes through the countersunk hole (23) and the through hole (33) in sequence to be threadedly connected with a nut.

7. The UHPC step combined steel ladder according to claim 1, characterized in that: The platform steel plate (31) and the support steel plate (32) are respectively connected to the steel beam (1) by welding, and the top of the support steel plate (32) is connected to the bottom of the platform steel plate (31) by welding.

8. The UHPC step combined steel ladder according to claim 1, characterized in that: A flexible seismic isolation and leveling rubber pad is provided between the UHPC step (2) and the platform steel plate (31).

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