CN212671301U - Movable construction safety steel stair for assembly type building stairwell - Google Patents

Abstract

The utility model discloses a portable construction safety steel stair for assembly type structure staircase belongs to construction technical field, the utility model discloses a connect the load roof beam in one side of major structure bottom, the load roof beam supporting is at N-1 layer structural slab, and the load post is connected to the opposite side that major structure bottom is relative with the load roof beam, and the load post supporting is on the middle structure board between N-2 layer structural slab and N-1 layer structural slab or the connected node department that supports two prefabricated folding staircases between N-1 layer structural slab and N-2 layer structural slab. Through setting up load beam and load post, can make the steel stair only occupy the space above the prefabricated folding stair, and need not occupy the space of structural slab. The utility model discloses a steel stair need not the scene and takes and tear open, is showing and is improving the efficiency of construction, saves the manual work, reduces construction cost.

Description

Movable construction safety steel stair for assembly type building stairwell

Technical Field

The utility model relates to a construction technical field specifically is a portable construction safety steel stair for assembly type structure stairwell.

Background

In the assembly type engineering construction, the prefabricated parts are matched with the aluminum alloy template, so that the construction time of the standard layer can be greatly reduced. Therefore, the efficient turnover of template materials is one of the major points. According to the construction process requirements of the prefabricated stairway on the standard floor, the prefabricated stairway on the N-1 floor is allowed to be hoisted after concrete is poured on the N floor. This also means that constructor can't reach N layers through the structure stair, can only reach the working face on N layers through climbing a stair, accomplishes processes such as installation template, reinforcement, concreting. The climbing frame is narrow in space, the influence of other working faces such as a material stacking and formwork dismounting in a floor can cause difficulty in walking and material carrying of workers, and the construction efficiency is influenced. In addition, due to the lack of the N-1-layer structure stairs, a cavity is formed in the construction process, great potential safety hazards exist, or the traditional full-hall support can only be used for mounting and dismounting construction, the construction efficiency is low, and the requirement of the whole progress cannot be met. In addition, the traditional full framing is erected on the structural slab, and a large amount of space is occupied.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a movable construction safety steel stair for an assembly type building stairwell, which aims to solve the problem that the influence of the constructors on the material stacking and template dismounting and other working faces in the building layer when the constructors reach the N working faces through climbing stairs can lead to the difficulty in walking and material carrying of the constructors and the influence on the construction efficiency; a cavity is formed in the construction process, so that greater potential safety hazard exists; the form of using full hall support to install and tear open the construction and have the efficiency of construction low, can not reach whole progress requirement, full hall support sets up on the structural slab, needs to occupy a large amount of technical problem in space.

In order to solve the technical problem, the utility model provides a portable construction safety steel stair for assembly type structure stairwell, this steel stair include:

the main structure comprises upright columns, a lower operation layer, an upper operation layer and a ladder stand, wherein the lower operation layer and the upper operation layer are connected between the adjacent upright columns, the ladder stand is connected between the upright columns above the lower operation layer and the upper operation layer, and the lower operation layer is flush with the N-1 layers of structure plates;

the bearing beam is connected to one side of the bottom of the lower operating layer and horizontally supported on the N-1 layers of structural plates;

and the bearing column is connected to one side of the bottom of the lower operating layer, which is opposite to the bearing beam, and is supported on the middle structural plate between the N-2 layers of structural plates and the N-1 layers of structural plates or at the connecting node of the two prefabricated folding staircases between the N-1 layers of structural plates and the N-2 layers of structural plates.

Preferably, the lower operation layer includes:

the lower operation layer longitudinal beam is connected between the adjacent upright columns and is linearly arranged with the bearing beam;

the lower operation layer beam is connected between the adjacent upright columns vertically to the lower operation layer longitudinal beam;

and the lower operating platform is connected between the lower operating floor longitudinal beam and the lower operating floor cross beam, and a lower operating floor hole is reserved on the lower operating platform.

Preferably, the bearing beam is detachably connected with the lower operation layer longitudinal beam, and the bearing beam can only rotate anticlockwise.

Preferably, one end of the lower operating layer longitudinal beam, which is close to the bearing beam, is connected with an ear plate, and a bolt penetrates through the ear plate, the bearing beam and the lower operating layer longitudinal beam to connect the bearing beam with the lower operating layer longitudinal beam.

Preferably, one end of the lower operating layer longitudinal beam, which is far away from the bearing beam, is connected with a vertical sleeve, the bearing column is inserted into the vertical sleeve, and the bolt penetrates through the vertical sleeve and the bearing column to connect the bearing column with the lower operating layer longitudinal beam.

Preferably, the middle part of the lower operation layer cross beam is further connected with a middle bearing beam and a lower operation layer middle longitudinal beam, the middle bearing beam and the lower operation layer middle longitudinal beam are linearly arranged and are parallel to the lower operation layer longitudinal beam, and the lower operation layer hole is formed between the lower operation layer middle longitudinal beam and one of the lower operation layer longitudinal beams.

Preferably, the upper operation layer includes:

the upper operating layer longitudinal beam is connected between the adjacent upright columns in parallel with the lower operating layer longitudinal beam;

the upper operation layer cross beam is connected between the adjacent upright columns in a manner of being vertical to the upper operation layer longitudinal beam;

and the upper operating layer platform is connected between the upper operating layer longitudinal beam and the upper operating layer cross beam, and an upper operating layer hole is reserved in the upper operating layer platform.

Preferably, the upper operation layer longitudinal beam is welded with a lifting lug plate.

Preferably, a turning plate is further hinged between the stand columns at the top of the ladder stand, and a chain is connected between one end, away from the upper operation layer, of the turning plate and the top of the stand column.

Compared with the prior art, the utility model discloses a characteristics and beneficial effect do:

(1) the utility model discloses a steel stair is through connecting the load roof beam in one side of major structure bottom, and the load roof beam supports at N-1 layer structural slab, and the load post is connected to the opposite side that major structure bottom is relative with the load roof beam, and the load post supports on the intermediate structure board between N-2 layer structural slab and N-1 layer structural slab or supports the connected node department of two prefabricated folding stairs between N-1 layer structural slab and N-2 layer structural slab. Through setting up load beam and load post, can make the fine prefabricated folding staircase room of being applied to of steel stair, reduce the space above the prefabricated folding staircase simultaneously, and do not occupy the space of structural slab.

(2) The circulation of taking apart once whenever carrying out of traditional steel pipe scaffold frame needs 4 workman 8h sides to accomplish, and the utility model discloses a steel stair need not the scene and takes and tear open, and the time of spending only is the hoist and mount time, and the hoist and mount needs 2 workman 1h to accomplish around using. Only the time is saved by 87.5 percent, and the construction progress is greatly accelerated. And the process is easy to insert, the conflict of the working surface is reduced, and the efficiency is improved.

(3) The utility model discloses a steel stair can repeatedly have enough to meet the need, practices thrift the cost, has apparent economic benefits.

Drawings

Fig. 1 is a construction schematic diagram of a steel stair.

Fig. 2 is a front view structural schematic diagram of the steel stair.

Fig. 3 is a side view structure diagram of the steel stair.

Fig. 4 is a schematic diagram of the lower operation layer.

Fig. 5 is a schematic diagram of the upper operational layer.

The attached drawings are marked as follows: 1-bearing beam, 2-bearing column, 3-upright column, 4-lower operation layer, 41-lower operation layer longitudinal beam, 42-lower operation layer cross beam, 43-lower operation platform, 44-lower operation layer middle longitudinal beam, 45-lower operation layer opening, 5-upper operation layer, 51-upper operation layer longitudinal beam, 52-upper operation layer cross beam, 53-upper operation layer platform, 54-upper operation layer opening, 55-hoisting ear plate, 6-N-1 layer structure plate, 7-N-2 layer structure plate, 8-middle structure plate, 9-chain, 10-prefabricated folding stair, 11-ear plate, 12-vertical sleeve, 13-middle bearing beam, 14-ladder stand and 15-turning plate.

Detailed Description

In order to make the technical means, innovative features, objectives and functions realized by the present invention easy to understand, the present invention will be further described below.

The embodiments described herein are specific embodiments of the present invention, and are intended to be illustrative of the concepts of the present invention, which are intended to be illustrative and exemplary, and should not be construed as limiting the scope of the embodiments of the present invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-5, a movable construction safety steel staircase for an assembly type building staircase comprises a main structure, a bearing beam 1 and a bearing column 2. The main structure comprises uprights 3, and a lower operating level 4 and an upper operating level 5 connected between adjacent uprights 3, said lower operating level 4 being flush with the N-1 structural slab 6, and a ladder 14 connected between the uprights 3 above the lower operating level 4 and the upper operating level 5. The bearing beam 1 is connected to one side of the bottom of the lower operating layer 4 and is horizontally supported on the N-1 structural plates 6. The force-bearing column 2 is connected at the bottom of the lower operating layer 4 and at the side opposite to the force-bearing beam 1, and the force-bearing column 2 is supported on an intermediate structure plate 8 between an N-2 layer structure plate 7 and an N-1 layer structure plate 6 or at the connecting node of two prefabricated folding stairs 10 between the N-1 layer structure plate 6 and the N-2 layer structure plate 7. The bottom of the bearing column 2 is welded with a steel plate, so that the stress area of the bearing end of the lower part is increased, and the stability is improved. A small cross beam is connected between the upright columns 3 on one side, close to the N layers of structural slabs, above the upper operation layer 5, two ends of the small cross beam are connected with the upright columns 3 in a welded mode, and the top of the ladder stand 14 is connected with the small cross beam in a welded mode. A guardrail is connected between the upright posts 3 above the upper operating layer 5. The guard rail is located above the top of the ladder 14.

The lower deck 4 includes lower deck stringers 41, lower deck beams 42, and lower deck 43. The lower operating layer longitudinal beam 41 is connected between the adjacent upright posts 3, and the lower operating layer longitudinal beam 41 and the bearing beam 1 are arranged in a straight line. The bearing beam 1 is detachably connected with the lower operation layer longitudinal beam 41, and the bearing beam 1 can only rotate anticlockwise. Specifically, one end of the lower operation layer longitudinal beam 41 close to the bearing beam 1 is connected with an ear plate 11, and a bolt penetrates through the ear plate 11, the bearing beam 1 and the lower operation layer longitudinal beam 41, so that the bearing beam 1 is connected with the lower operation layer longitudinal beam 41. The lower deck beams 42 are connected between the adjacent columns 3 perpendicular to the lower deck longitudinal beams 41. The lower operation platform 43 is connected between the lower operation layer longitudinal beam 41 and the lower operation layer cross beam 42, and a lower operation layer hole 45 is reserved on the lower operation platform 43.

In order to enhance the bearing capacity and stability of the steel stair, the middle part of the lower operation layer cross beam 42 is further connected with a middle bearing beam 13 and a lower operation layer middle longitudinal beam 44, the middle bearing beam 13 and the lower operation layer middle longitudinal beam 44 are linearly arranged and are parallel to the lower operation layer longitudinal beam 41, and the lower operation layer hole 45 is formed between the lower operation layer middle longitudinal beam 44 and one lower operation layer longitudinal beam 41. A reinforcing cross beam is also connected between the lower operating layer middle longitudinal beam 44 and one of the lower operating layer longitudinal beams 41.

One end, far away from the bearing beam 1, of the lower operation layer longitudinal beam 41 is connected with a vertical sleeve 12, the bearing column 2 is inserted into the vertical sleeve 12, and a bolt penetrates through the vertical sleeve 12 and the bearing column 2, so that the bearing column 2 is connected with the lower operation layer longitudinal beam 41.

The upper deck 5 comprises upper deck stringers 51, upper deck beams 52 and upper deck platforms 53. The upper deck stringer 51 is connected between adjacent pillars 3 in parallel with the lower deck stringer 41. And a lifting lug plate 55 is welded on the upper operating layer longitudinal beam 51. The upper deck beams 52 are connected between the adjacent columns 3 perpendicularly to the upper deck stringers 51. The middle of the upper operating layer cross beam 52 is also connected with an upper operating layer middle longitudinal beam. A reinforcing cross beam is also connected between the upper operating layer middle longitudinal beam and the upper operating layer longitudinal beam 51. The upper operation layer platform 53 is connected between the upper operation layer longitudinal beam 51 and the upper operation layer cross beam 52, and an upper operation layer hole 54 is reserved on the upper operation layer platform 53. The upper worktop opening 54 is provided between the upper worktop mid stringer and one of the upper worktop stringers 51. A turning plate 15 is further hinged between the upright posts 3 at the top of the ladder stand 14, and a chain 9 is connected between one end of the turning plate 15, which is far away from the upper operating layer 5, and the top of the upright post 3.

The construction method of the movable safety steel stair for construction of the assembly type building stairwell comprises the following steps:

firstly, processing and manufacturing raw materials, and installing an upright post 3, a lower operation layer 4 and an upper operation layer 5;

step two, mounting a ladder stand 14, a turning plate 15, a bearing beam 1 and a bearing column 2;

step three, painting on the surface of the steel stair;

step four, after the N-1 layer of structural slab 6 reaches 50% of the design strength, preparing to hoist the steel stair, wherein in the hoisting process, the bearing beam 1 and the bearing column 2 naturally droop;

and step five, when the steel stair is hoisted to the N-1 layer of structural slab 6 and the N layer of structural slab, the bearing beam 1 rotates clockwise to be horizontal, the bearing beam 1 is placed on the N-1 layer of structural slab 6, and simultaneously the bottom end of the bearing column 2 is supported on a middle structural slab 8 between the N-2 layer of structural slab 7 and the N-1 layer of structural slab 6 or is supported at a connecting node of two prefabricated folding stairs 10 between the N-1 layer of structural slab 6 and the N-2 layer of structural slab 7.

Specifically, taking a certain project as an example, the upright column 3, the lower operation layer longitudinal beam 41, the lower operation layer cross beam 42, the lower operation layer middle longitudinal beam 44, the upper operation layer longitudinal beam 51 and the upper operation layer cross beam 52 are all connected into a whole by welding. The lower operating layer longitudinal beam 41, the lower operating layer cross beam 42, the lower operating layer middle longitudinal beam 44, the upper operating layer longitudinal beam 51, the upper operating layer cross beam 52, the bearing beam 1 and the bearing column 2 are all 16# I-steel, and the upright column 3 is a 10# square tube. The ear plates 11 are made of steel plates with the thickness of 160 multiplied by 10mm, and the bearing beam 1 is inserted between the ear plates 11 and connected by bolts. Three steel plates are welded and connected with the end part of the lower operation layer longitudinal beam 41 to form a vertical sleeve 12, and the vertical sleeve 12 is mainly used for vertical stress and limiting the horizontal displacement of the bearing column 2. The steel plate at the bottom of the bearing column 2 is 240 multiplied by 10 mm. The cat ladder roof beam of cat ladder 14 adopts 5# square tube, and the ladder step adopts the decorative pattern steel sheet of 4mm thickness, all adopts welded fastening. The lifting ear plate 55 is a steel plate with a thickness of 10 mm. The lower operating platform 43, the upper operating layer platform 53 and the turning plate 15 are all made of pattern steel plates with the thickness of 4 mm. The guardrail is 5# square tube. The small beam adopts a 5# square tube.

The processing and the assembly of the steel stairs need to be finished in a designated area, and the assembly process needs to be supervised by project site accountants or security personnel side stations. Workers need to fasten safety belts for high-altitude operation, and if the workers need to carry related certificates and fire calls for open-fire operation such as spot electric welding or cutting, the workers need to wear the safety belts. After assembly, painting according to project requirements to make protection, and finally checking and accepting by project management personnel.

And after the floor of the N-1 floor reaches 50% of the design strength, preparing to hoist the steel stair, checking the steel wire rope, the buckle lifting hook and the like before hoisting, slowly and stably carrying out the hoisting process, and ensuring that the steel stair keeps horizontal in the hoisting process. In the hoisting process, the bearing beams 1 on the two sides of the steel stair naturally droop, before the stair is arranged, a constructor pulls up the bearing beams 1 at the position where the stair is finally arranged and buckles the bearing beams 1 on the vertical keel by using the flap zipper, and then guides the steel stair to be arranged at the designated position. If the connecting part of the steel stair and the N-1 layer structural plate 6 has height difference or dislocation, the connecting part can be leveled by square wood and wood plates. The bottom of the steel stair can be effectively tied by adopting a steel pipe fastener and a cast-in-place structure, and the top of the steel stair is provided with measures such as a cable rope and the like to prevent the stair from shaking.

When the platform is used, the total construction load must not exceed the allowable load of 10 KN. Carry out load test before the first use, load 15 KN's load (about 1.5 t) on the steel platform, safe no problem rear can put into normal use.

The wall body of the staircase is provided with the outer side template firstly and then the inner side template, and the through-wall bolt is fastened immediately, so that the detention time of the large template on the platform is reduced as much as possible.

For the safe use of the steel stair, the steel stair platform is strictly forbidden to be piled up.

Construction of the layer is completed, and after sundries on the cleaning platform are confirmed to be safe, the platform can be lifted to the upper layer to be fixed in place. A tower crane is used for lifting, a signal worker and a tower crane driver are closely matched, firstly, trial lifting is carried out, a steel stair is lifted, meanwhile, the bearing beam 1 is folded to enable the bearing beam to naturally droop, and the bearing beam is lifted to a specified storage place so as to be convenient for next turnover use.

In order to ensure the normal use of the steel stairs, frequent cleaning and maintenance are required. After the concrete construction is finished, concrete and other sundries scattered at the steel stair platform and the step plate are immediately cleaned, so that pollution is avoided. After the steel platform uses three layers each time, the engineering department and the safety department carry out comprehensive inspection and maintenance on the steel platform. In daily use, the engineering department should check the welding seam quality frequently, if finding unsafe phenomena such as welding seam cracking, should stop using immediately and report to the technical department, and the technical department proposes the treatment measure to carry out the trimming.

After the standard layer of the tower building is constructed and the last prefabricated staircase is hoisted, the steel stairway is hoisted to the designated position by using the tower crane to be stored.

The above embodiments are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims.

Claims (9)

1. A portable construction safety steel stair for prefabricated building stairwell, its characterized in that, this steel stair includes:

the main structure comprises upright columns (3), a lower operation layer (4) and an upper operation layer (5) which are connected between the adjacent upright columns (3), and a ladder stand (14) which is connected between the upright columns (3) above the lower operation layer (4) and the upper operation layer (5), wherein the lower operation layer (4) is flush with the N-1 layers of structural plates (6);

the bearing beam (1) is connected to one side of the bottom of the lower operating layer (4) and horizontally supported on the N-1 layers of structural plates (6);

and the bearing column (2) is connected to the side, opposite to the bearing beam (1), of the bottom of the lower operating layer (4), and the bearing column (2) is supported on the middle structural plate (8) between the N-2 layers of structural plates (7) and the N-1 layers of structural plates (6) or is supported at the joint of two prefabricated folding staircases (10) between the N-1 layers of structural plates (6) and the N-2 layers of structural plates (7).

2. The mobile construction safety steel staircase for prefabricated building stairwells according to claim 1, characterized in that said lower operating level (4) comprises:

the lower operating layer longitudinal beam (41) is connected between the adjacent upright columns (3), and the lower operating layer longitudinal beam (41) and the bearing beam (1) are arranged in a straight line;

the lower operation layer cross beam (42) is connected between the adjacent vertical columns (3) and is vertical to the lower operation layer longitudinal beam (41);

and the lower operating platform (43) is connected between the lower operating floor longitudinal beam (41) and the lower operating floor cross beam (42), and a lower operating floor hole (45) is reserved on the lower operating platform (43).

3. The mobile construction safety steel staircase for prefabricated building stairwells according to claim 2, wherein: the bearing beam (1) is detachably connected with the lower operation layer longitudinal beam (41), and the bearing beam (1) can only rotate anticlockwise.

4. The mobile construction safety steel staircase for prefabricated building stairwells according to claim 3, wherein: one end, close to the bearing beam (1), of the lower operating layer longitudinal beam (41) is connected with an ear plate (11), and a bolt penetrates through the ear plate (11), the bearing beam (1) and the lower operating layer longitudinal beam (41), so that the bearing beam (1) is connected with the lower operating layer longitudinal beam (41).

5. The mobile construction safety steel staircase for prefabricated building stairwells according to claim 2, wherein: one end, far away from the bearing beam (1), of the lower operation layer longitudinal beam (41) is connected with a vertical sleeve (12), the bearing column (2) is inserted into the vertical sleeve (12), and a bolt penetrates through the vertical sleeve (12) and the bearing column (2) so as to connect the bearing column (2) with the lower operation layer longitudinal beam (41).

6. The mobile construction safety steel staircase for prefabricated building stairwells according to claim 2, wherein: the middle part of the lower operation layer cross beam (42) is further connected with a middle bearing beam (13) and a lower operation layer middle longitudinal beam (44), the middle bearing beam (13) and the lower operation layer middle longitudinal beam (44) are arranged linearly and are parallel to the lower operation layer longitudinal beam (41), and the lower operation layer hole (45) is formed between the lower operation layer middle longitudinal beam (44) and one of the lower operation layer longitudinal beams (41).

7. The mobile construction safety steel staircase for prefabricated building stairwells according to claim 2, characterized in that said upper operating level (5) comprises:

an upper operating floor stringer (51) connected between adjacent columns (3) in parallel with the lower operating floor stringer (41);

the upper operating floor cross beam (52) is connected between the adjacent vertical columns (3) and is vertical to the upper operating floor longitudinal beam (51);

and the upper operating floor platform (53) is connected between the upper operating floor longitudinal beam (51) and the upper operating floor cross beam (52), and an upper operating floor hole (54) is reserved on the upper operating floor platform (53).

8. The mobile construction safety steel staircase for prefabricated building stairwells according to claim 7, wherein: and the upper operating layer longitudinal beam (51) is welded and connected with a lifting lug plate (55).

9. The mobile construction safety steel staircase for prefabricated building stairwells according to claim 1, wherein: a turning plate (15) is further hinged between the upright columns (3) at the top of the ladder stand (14), and a chain (9) is connected between one end, far away from the upper operation layer (5), of the turning plate (15) and the top of the upright column (3).

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