CN214531594U - Prefabricated staircase ladder section starting end connected node structure - Google Patents

Abstract

A connection node structure of a starting end of a stair section of a prefabricated stair comprises a stair beam and a prefabricated stair, wherein a starting first-stage step of the prefabricated stair is horizontally placed right above the stair beam; the starting first-stage step is provided with a plurality of reserved cavities which are communicated up and down along the length direction of the starting first-stage step, pin bolts fixed with the ladder beam are arranged in the reserved cavities, and a mortar blocking layer covering the pin bolts is poured in the reserved cavities; the left side of the starting first-stage step on the ladder beam is provided with a flanging part, and a filling layer is arranged between the flanging part and the starting first-stage step. According to the scheme, the calculation span of the ladder beam is reduced to a certain extent, so that the plate thickness and the stressed steel bars of the prefabricated staircase are reduced, the self weight of the ladder beam is reduced, and the field hoisting operation is facilitated; and the starting first-stage step is reliably connected with the ladder beam through the pin bolt, and the flanging part is arranged to be used as flanging limitation, so that the prefabricated staircase is prevented from slipping down under the condition of large earthquake, and potential safety hazards which may be brought when the traditional method is not adopted are eliminated.

Description

Prefabricated staircase ladder section starting end connected node structure

Technical Field

The utility model relates to a prefabricated assembly type structure technical field, in particular to prefabricated staircase bench starting end connected node structure.

Background

The fabricated building is a building which is formed by transferring a large amount of field operation work in the traditional construction mode to a factory, processing and manufacturing building components and accessories (such as floor slabs, wall slabs, stairs, balconies and the like) in the factory, transporting the components and accessories to a building construction site, and assembling and installing the components and the accessories on the site in a reliable connection mode.

In the stair construction process of the existing fabricated building, the assembling mode of the prefabricated plate type stair and the stair beam can refer to the attached drawing 1, and the traditional method is that a bracket 104 of a horizontal section is cast in situ on the side edge of the stair beam 101, then a starting first-stage step 103 of the stair 102 is directly placed on the bracket 104, and then the stair and the stair beam 101 are fixedly connected through a pin bolt. In carrying out the present invention, the applicant has found that there are at least the following problems with this approach: the bracket of a cast-in-place horizontal segment in ladder roof beam one side has increaseed the span of stair tread to a certain extent, has increased the atress reinforcing bar and the stair tread thickness of stair tread, and then has increased concrete prefabricated component's weight, is unfavorable for the hoist and mount of concrete prefabricated component, makes manufacturing cost, the construction degree of difficulty be difficult to reduce.

In view of this, how to solve span, the high, be unfavorable for construction scheduling problem of the increase stair tread that the traditional mounting means of prefabricated plate stair and ladder beam exists, just become the utility model discloses the problem that the research was solved.

Disclosure of Invention

The utility model provides a prefabricated stair flight starting end connected node structure, the span that the increase stair tread that its purpose will solve prefabricated plate stair and the traditional assembled mode of ladder beam exist, manufacturing cost are high, be unfavorable for the construction scheduling problem to reduce the span of stair flight, reduce the steel content of stair flight, reduce the dead weight of stair flight, also eliminated the potential safety hazard that can bring when not adopting traditional way simultaneously.

In order to achieve the above object, the utility model provides a prefabricated staircase bench starting end connected node structure, this connected node structure include ladder beam and prefabricated staircase, and prefabricated staircase has the starting one-level step as bench starting end, and prefabricated staircase from left to right upwards promotes, and its innovation point lies in:

the starting first-stage step of the prefabricated staircase is horizontally placed right above the staircase beam, and a cement mortar leveling layer is arranged at the joint of the starting first-stage step and the staircase beam;

the prefabricated staircase comprises a starting first-stage step, a plurality of prefabricated staircases and a staircase beam, wherein the starting first-stage step is provided with a plurality of reserved cavities which are communicated up and down along the length direction of the starting first-stage step, pin bolts fixed with the staircase beam are arranged in the reserved cavities, a mortar blocking layer covering the pin bolts is poured in the reserved cavities, and the prefabricated staircase and the staircase beam are reliably connected through the pin bolts and the mortar blocking layer;

the left side of the starting first-stage step on the ladder beam is provided with a flanging part, and a filling layer is arranged between the flanging part and the starting first-stage step.

The related content of the utility model is explained as follows:

1. in the technical scheme of the utility model, when the prefabricated staircase is assembled with the ladder beam, the starting first-level step of the prefabricated staircase is directly placed right above the ladder beam, so that the bracket flat section of the ladder beam is prevented from being required to be arranged in the traditional assembly mode, the calculation span of the ladder beam is reduced to a certain extent, the plate thickness and the stress reinforcing steel bar of the prefabricated staircase are reduced, the dead weight of the ladder beam is reduced, and the field hoisting operation is facilitated; and the starting first-stage step is reliably connected with the ladder beam through the pin bolt, and the flanging part is arranged to be used as flanging limitation, so that the prefabricated staircase is prevented from slipping down under the condition of large earthquake, and potential safety hazards which may be brought when the traditional method is not adopted are eliminated.

2. In the technical scheme, the flanging part is the concrete flanging part, and the flanging part and the ladder beam are integrally cast, so that the flanging part is firm and better in protection, the firmness of the flanging part is enhanced, the construction is simple, and the concrete flanging part and the ladder beam can be cast together.

3. In the technical scheme, the reserved cavity is a conical hole, the aperture of the reserved cavity is gradually reduced from top to bottom, and when the mortar plugging layer is poured, the mortar plugging layer forms a firm and reliable connecting structure.

4. In the technical scheme, the filling layer is a PE rod inserted into a gap between the flanging part and the starting first-stage step, the PE rod is a rod-shaped structure made of polyethylene materials, and the PE rod has good heat resistance and cold resistance, good chemical stability, higher rigidity and toughness and good mechanical strength.

5. In the technical scheme, the starting first-stage step is provided with two reserved cavities along the length direction, the reserved cavities are uniformly distributed on the starting first-stage step, each reserved cavity corresponds to one pin bolt, and the connection reliability of the prefabricated staircase and the ladder beam is improved.

6. In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, coupled between two elements, or coupled in any other manner that does not materially affect the operation of the device, unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

7. In the present invention, the terms "center", "upper", "lower", "axial", "bottom", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional assembly relationships shown in the drawings, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.

Because of the application of above-mentioned scheme, compared with the prior art, the utility model have following advantage and effect:

1. the above technical scheme of the utility model, shelve directly over the ladder roof beam through the start one-level step of direct with prefabricated staircase, and then avoided traditional assembly methods to need set up the bracket flat section of ladder roof beam, reduced the calculation span of ladder roof beam to a certain extent (practice thrift the concrete), and then reduced the thick and atress reinforcing bar (saving steel) of prefabricated staircase, reduced the dead weight of ladder roof beam (reduce the hoist and mount degree of difficulty and risk), made things convenient for the on-the-spot hoist and mount operation.

2. The above technical scheme of the utility model, reliably be connected starting one-level step and ladder roof beam through the cotter pin, and spacing as the turn-ups through setting up turn-ups portion, prevent the landing of prefabricated stair under the big shake, eliminated the potential safety hazard that may bring when not adopting traditional way.

Drawings

FIG. 1 is a schematic view of a conventional assembly method of a conventional prefabricated plate type staircase and a staircase beam;

figure 2 is the utility model discloses prefabricated staircase stair starting end connected node structure's structure schematic.

The drawings are shown in the following parts:

1. a ladder beam; 2. prefabricating a stair; 3. starting a first-stage step; 4. leveling layer; 5. reserving a cavity; 6. a pin; 7. a mortar blocking layer; 8. flanging part; 9. a filling layer;

101. a ladder beam; 102. prefabricating a stair; 103. starting a first-stage step; 104. and (4) a bracket.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

As shown in the accompanying drawing 2, the embodiment of the utility model provides a prefabricated staircase bench start end connected node structure, this connected node structure include terraced roof beam 1 and prefabricated staircase 2, and prefabricated staircase 2 has the starting one-level step 3 as bench start end, and prefabricated staircase 2 from left to right upwards promotes.

The embodiment of the utility model provides an in, 3 levels of starting one-level step of prefabricated staircase 2 are placed directly over terraced roof beam 1, are provided with cement mortar screed-coat 4 at starting one-level step 3 and terraced roof beam 1's seam crossing.

In the embodiment of the utility model, the starting first-stage step 3 is provided with a plurality of reserved cavities 5 which are communicated up and down along the length direction, the reserved cavities 5 are provided with pins 6 fixed with the ladder beam 1, the reserved cavities 5 are poured with mortar sealing layers 7 covering the pins 6, and the prefabricated staircase 2 and the ladder beam 1 are reliably connected through the pins 6 and the mortar sealing layers 7; the reserved cavity 5 is a conical hole, the aperture of the reserved cavity 5 is gradually reduced from top to bottom, when the mortar blocking layer 7 is poured, the mortar blocking layer 7 is enabled to form a firm and reliable connecting structure, meanwhile, when the mortar blocking layer 7 is poured, the upper surface of the mortar blocking layer 7 is required to be flush with the upper surface of the starting first-stage step 3, and the mortar blocking layer is required to be flat, dense and smooth after being blocked.

In the embodiment of the utility model, a flanging part 8 is arranged on the left side of the starting primary step 3 on the ladder beam 1, the flanging part 8 is a concrete flanging part 8, the flanging part 8 and the ladder beam 1 are integrally cast, so that the protection of the flanging part 8 is firm and better, the firmness of the flanging part 8 is enhanced, the construction is simple, and the ladder beam 1 can be cast together; the filling layer 9 is arranged between the flanging part 8 and the starting primary step 3, the filling layer 9 is a PE rod inserted into a gap between the flanging part 8 and the starting primary step 3, the PE rod is a rod-shaped structure made of polyethylene materials, and the PE rod has good heat resistance and cold resistance, good chemical stability, high rigidity and toughness and good mechanical strength.

Through the implementation of the embodiment of the utility model, when the prefabricated staircase 2 is assembled with the ladder beam 1, the starting first-level step 3 of the prefabricated staircase 2 is directly placed right above the ladder beam 1, so that the bracket flat section of the ladder beam 1 is avoided from being required to be arranged in the traditional assembly mode, the calculation span of the ladder beam 1 is reduced to a certain extent, the plate thickness and the stressed steel bars of the prefabricated staircase 2 are reduced, the dead weight of the ladder beam 1 is reduced, and the field hoisting operation is facilitated; the starting first-stage step 3 and the ladder beam 1 are reliably connected through the pin bolt 6, and the flanging part 8 is arranged to be used as flanging limiting, so that the prefabricated staircase 2 is prevented from slipping down in a large earthquake, and potential safety hazards which may be brought when a traditional method is not adopted are eliminated.

With respect to the above embodiments, the changes that may be made by the present invention are described as follows:

1. in above embodiment, starting one-level step 3 is equipped with two reservation chambeies 5 along its length direction, and reservation chamber 5 evenly arranges on starting one-level step 3, and every reservation chamber 5 corresponds a cotter 6, increases the reliability that prefabricated stair 2 and ladder beam 1 are connected, but the utility model discloses not with this for the restriction, be a plurality of reasonable quantity arrange reserve chamber 5 can.

2. In the above embodiments, the leveling layer 4 may be a cement mortar leveling layer 4, or may be a composite layer of polystyrene board filling and asphalt felt.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (5)

1. The utility model provides a prefabricated staircase stair starting end connected node structure, this connected node structure includes terraced roof beam (1) and prefabricated staircase (2), and prefabricated staircase (2) have starting one-level step (3) as stair starting end, and prefabricated staircase (2) from left to right upwards promote its characterized in that:

a starting first-stage step (3) of the prefabricated staircase (2) is horizontally placed right above the ladder beam (1), and a leveling layer (4) is arranged at the joint of the starting first-stage step (3) and the ladder beam (1);

a plurality of reserved cavities (5) which are communicated up and down are formed in the starting first-stage step (3) along the length direction of the starting first-stage step, pin bolts (6) fixed with the ladder beam (1) are arranged in the reserved cavities (5), and a mortar blocking layer (7) covering the pin bolts (6) is poured in the reserved cavities (5);

a flanging part (8) is arranged on the left side of the starting first-stage step (3) on the ladder beam (1), and a filling layer (9) is arranged between the flanging part (8) and the starting first-stage step (3).

2. The prefabricated staircase segment starting end connecting node structure as claimed in claim 1, wherein: the flanging part (8) is a concrete flanging part (8), and the flanging part (8) and the ladder beam (1) are integrally cast and formed.

3. The prefabricated staircase segment starting end connecting node structure as claimed in claim 1, wherein: the reserved cavity (5) is a conical hole, and the aperture of the reserved cavity (5) is gradually reduced from top to bottom.

4. The prefabricated staircase segment starting end connecting node structure as claimed in claim 1, wherein: the filling layer (9) is a PE rod inserted into a gap between the flanging part (8) and the starting first-stage step (3).

5. The prefabricated staircase segment starting end connecting node structure as claimed in claim 1, wherein: the starting first-stage step (3) is provided with two reserved cavities (5) along the length direction, and each reserved cavity (5) corresponds to one pin bolt (6).

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