Fabricated steel-concrete combined stair

Abstract

The utility model discloses an assembly type steel concrete combined stair which comprises two stair beams and a plurality of steps, the two stair beams are oppositely arranged, and the upper side surfaces and the lower side surfaces of the two stair beams are in one-to-one correspondence; the upper side surface of the ladder beam is step-shaped, and the lower side surface of the ladder beam is an upward or downward inclined surface; one end of the ladder beam is fixedly connected with the concrete ground on one side, and the other end of the ladder beam extends downwards or upwards and then is fixedly connected with the concrete ground on the other side; the steps are located between the two ladder beams, the steps are distributed along the ladder beams in a step shape, and the upper side surfaces of the steps are flush with the upper side surfaces of the ladder beams to form a plurality of steps; the two ends of each ladder beam are each provided with a connecting piece, the two connecting pieces are located on the side, opposite to the other ladder beam, of the ladder beam, and the ladder beams are fixedly connected with the concrete ground through the connecting pieces.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, in particular to an assembled steel-concrete combined staircase. Background Art

[0002] Precast concrete stairs are heavy and have high transportation and installation costs. Steel stairs are light, but the steel is expensive and requires anti-corrosion and fireproofing, so the overall cost is higher than that of precast concrete stairs. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present utility model is to provide an assembled steel-concrete combination staircase to solve the problems in the prior art of heavy precast concrete buildings, high transportation and installation costs, large amount of steel used in steel stairs, the need for anti-corrosion and fireproofing treatment, and higher overall cost.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The staircase of claim 1, wherein the two rails have an upper surface and a lower surface that are aligned with the upper edge of the staircase, the lower surface of the two rails being aligned with the upper edge of the staircase. The staircase has an upper surface and a lower surface that are aligned with the upper edge of the staircase. The staircase has one end and a lower surface that are aligned with the upper edge of the staircase.

[0006] Preferably, a bracket is provided at both ends of the step along its length direction, and the bracket is L-shaped. The long section and the short section of the bracket are respectively parallel to the long section and the short section of the pedal, and are fixedly connected to one end of the step; multiple connecting bolts pass through the ladder beam and the pedal at the same time, so that the bracket is placed on the connecting bolts to fix the ladder beam and the pedal.

[0007] Preferably, both ends of the ladder beam extend in a direction away from the long section of the tread to form connecting ends, and the upper side surfaces of the connecting ends are flush with the upper side surfaces of the steps adjacent thereto.

[0008] Preferably, the side of the concrete floor connected to the ladder beam is recessed downward to form a groove, the connecting piece is placed in the groove, and its bottom end is fixedly connected to the bottom of the groove; there are gaps between the connecting piece and the side wall of the groove, and between the connecting piece and the long section of the step, and a cover plate is laid above the connecting piece, the cover plate is fixedly connected to the connecting piece, and the upper surface of the cover plate is flush with the concrete floor, and the cover plate simultaneously covers the gaps between the connecting piece and the side wall of the groove, and between the connecting piece and the step.

[0009] Preferably, an anchor bolt is provided between the connecting piece and the concrete floor. The anchor bolt is L-shaped, with its long section buried in the concrete below the groove, and its short section extending upward from the bottom of the connecting piece through the bottom of the groove into the connecting piece, and fixedly connected to the connecting piece by a nut, so that the connecting piece is fixedly connected to the concrete floor.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] 1. The utility model connects the L-shaped steps with the steel ladder beam by pre-embedded sleeves and bolts to form an assembled steel-concrete composite staircase, which gives full play to the tension of steel and the compression of concrete. Compared with steel stairs, the amount of steel used is greatly reduced, thereby reducing material costs; the L-shaped steps are light in weight, and compared with fully prefabricated concrete stairs, the weight is greatly reduced, which is convenient for transportation and installation.

[0012] 2. The utility model leaves a joint between each L-shaped prefabricated concrete standard step. On the one hand, the standard step can be adapted to different stair heights through the method of "fixed step height + adjustable joint", thereby standardizing the steps and facilitating industrial production; on the other hand, an error is reserved for installation, reducing the production accuracy requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a structural schematic diagram of an assembled steel-concrete composite staircase.

[0014] Figure 2 This is a schematic diagram of the structure of the ladder beam.

[0015] Figure 3 This is a schematic diagram of the structure of the pedal.

[0016] In the figure: ladder beam 1, concrete floor 2, connecting piece 3, step 4, bracket 5, connecting bolt 6, connecting end 7, groove 8, anchor bolt 9, nut 10, cover plate 11. DETAILED DESCRIPTION

[0017] The present invention will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the present invention belong to the scope of protection of the present invention.

[0018] The utility model provides an assembled steel-concrete combined staircase, such as Figures 1 to 3 As shown, it includes two ladder beams 1 and a plurality of steps. The two ladder beams are arranged opposite to each other, and the upper surface and the lower surface of the two ladder beams correspond to each other. The upper surface of the ladder beam is in a step shape, and the lower surface is an inclined surface inclined upward or downward. One end of the ladder beam is fixedly connected to a concrete floor 2 on one side, and the other end thereof extends downward or upward and is fixedly connected to the concrete floor on the other side. The steps are located between the two ladder beams and are distributed along the length direction of the ladder beams, and the two ends of the steps are fixedly connected to the opposite sides of the two ladder beams respectively. The L-shaped steps are prefabricated reinforced concrete components. Compared with fully prefabricated concrete stairs, the dead weight is greatly reduced, thereby greatly reducing the dead weight of the stairs. The ladder beam is a steel component. The L-shaped steps are connected to the ladder beam by bolts to form a composite component, which gives full play to the material properties of steel under tension and concrete under compression and reduces the amount of steel used. The cross-section of the steps is L-shaped and has a long section and a short section. The short section of the steps is located above the long section of the steps adjacent to it. The steps are distributed in a step-like manner along the ladder beam, and the upper side surface of the steps is flush with the upper side surface of the ladder beam to form a plurality of steps. A connecting piece 3 is also provided at each end of the ladder beam, and the two connecting pieces are located on the side of the ladder beam opposite to the other ladder beam. The ladder beam is fixedly connected to the concrete floor through the connecting piece.

[0019] In the specific implementation, a bracket 5 is provided at both ends of the step 4 along its length direction. The bracket is L-shaped. The long section and short section of the bracket are parallel to the long section and short section of the pedal respectively, and are fixedly connected to one end of the step. A plurality of connecting bolts 6 pass through the ladder beam and the pedal at the same time, so that the bracket is placed on the connecting bolts to fix the ladder beam and the pedal. Between two adjacent steps, the short section of one step is located above the long section of the other step adjacent to it, that is: between two adjacent steps, there is a gap between the short section of one step and the long section of the other step adjacent to it, and the size of the gap can be adjusted. The purpose of setting the gap is that, on the one hand, a large number of steps of uniform size can be standardized and produced by the method of "fixed step height + adjustable gap size", and then the gap size between adjacent steps can be adjusted to meet the requirements of different stairs for different step heights. Only the position of the step needs to be adjusted, and there is no need to re-make steps of different heights and sizes, thereby achieving standardized production and reducing costs; on the other hand, the existence of the gap makes the allowable error during the installation of the step large, which is convenient for construction personnel to operate.

[0020] In some embodiments, the two ends of the ladder beam extend in a direction away from the long section of the tread to form a connecting end 7, and the upper surface of the connecting end is flush with the upper surface of the step adjacent thereto. The side of the concrete floor connected to the ladder beam is recessed downward to form a groove 8, and the connecting member is placed in the groove, and its bottom end is fixedly connected to the bottom of the groove; there are gaps between the connecting member and the side wall of the groove, and between the connecting member and the long section of the step, and a cover plate 11 is laid above the connecting member, and the cover plate is fixedly connected to the connecting member, and the upper surface of the cover plate is flush with the concrete floor, and the cover plate covers the gaps between the connecting member and the side wall of the groove, and between the connecting member and the step. An anchor bolt 9 is provided between the connecting member and the concrete floor, and the anchor bolt is L-shaped, and the anchor bolt has a long section and a short section. The long section of the anchor bolt is buried in the concrete below the groove, and the short section of the anchor bolt passes through the bottom of the groove and extends upward from the bottom of the connecting member into the connecting member, and is fixedly connected to the connecting member through a nut 10, so that the connecting member is fixedly connected to the concrete floor.

[0021] The present invention is not limited to the above-mentioned implementation modes, and any structure that is the same or similar to the above-mentioned embodiments of the present invention is within the protection scope of the present invention.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.

Claims

1. An assembled steel-concrete composite staircase, comprising two ladder beams (1) and a plurality of steps, characterized in that: Two ladder beams are arranged facing each other, and the upper surfaces and lower surfaces of the two ladder beams correspond to each other; the upper surface of the ladder beam is in a step shape, and the lower surface is an inclined surface inclined upward or downward; one end of the ladder beam is fixedly connected to a concrete floor (2) on one side, and the other end of the ladder beam extends downward or upward and is fixedly connected to the concrete floor on the other side; The step is located between two ladder beams and distributed along the length direction of the ladder beams, and the two ends of the step are respectively fixedly connected to the opposite sides of the two ladder beams; the cross section of the step is L-shaped and has a long section and a short section, and the short section of the step is located above the long section of the step adjacent to it; the step is distributed in a step-like manner along the ladder beam, and the upper side surface of the step is flush with the upper side surface of the ladder beam to form a plurality of steps; A connecting piece (3) is also provided at each end of the ladder beam, and the two connecting pieces are located on one side of the ladder beam opposite to the other ladder beam, and the ladder beam is fixedly connected to the concrete floor through the connecting pieces.

2. The assembled steel-concrete composite staircase according to claim 1 is characterized in that: A bracket (5) is provided at each end of the step (4) along its length direction. The bracket is L-shaped. The long section and the short section of the bracket are respectively parallel to the long section and the short section of the pedal and are fixedly connected to one end of the step. A plurality of connecting bolts (6) pass through the ladder beam and the pedal at the same time, so that the bracket is placed on the connecting bolts to fix the ladder beam and the pedal.

3. The assembled steel-concrete composite staircase according to claim 1 is characterized in that: Both ends of the ladder beam extend in a direction away from the long section of the tread to form connecting ends (7), and the upper side surface of the connecting end is flush with the upper side surface of the step adjacent thereto.

4. The assembled steel-concrete composite staircase according to claim 3 is characterized in that: The side of the concrete floor connected to the ladder beam is recessed downward to form a groove (8), and the connecting piece is placed in the groove, with its bottom end fixedly connected to the bottom of the groove; there are gaps between the connecting piece and the side wall of the groove, and between the connecting piece and the long section of the step, and a cover plate (11) is laid above the connecting piece, the cover plate is fixedly connected to the connecting piece, and the upper surface of the cover plate is flush with the concrete floor, and the cover plate simultaneously covers the gaps between the connecting piece and the side wall of the groove, and between the connecting piece and the step.

5. The assembled steel-concrete composite staircase according to claim 4 is characterized in that: An anchor bolt (9) is provided between the connecting piece and the concrete floor. The anchor bolt is L-shaped, with a long section buried in the concrete below the groove, and a short section extending upward from the bottom of the connecting piece through the bottom of the groove into the connecting piece, and is fixedly connected to the connecting piece via a nut (10), thereby fixing the connecting piece to the concrete floor.

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