CN215858702U

CN215858702U - Stair platform structure

Info

Publication number: CN215858702U
Application number: CN202122031504.8U
Authority: CN
Inventors: 尹述荣; 李治
Original assignee: CITIC General Institute of Architectural Design and Research Co Ltd
Current assignee: CITIC General Institute of Architectural Design and Research Co Ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2022-02-18
Anticipated expiration: 2031-08-26

Abstract

The utility model relates to a stair landing structure which comprises a stair landing, a stair landing downward stair section and a stair landing upward stair section, wherein the stair landing downward stair section is provided with a downward stair section edge beam for supporting the stair landing downward stair section, and the stair landing upward stair section is provided with an upward stair section edge beam for supporting the stair landing upward stair section. The stress mode that the step was supported by upper and lower both sides turns into the board stress mode of encorbelmenting, has increased under the condition of not increasing step thickness the net height under the ladder platform, the design is ingenious, and the practicality is strong.

Description

Stair platform structure

Technical Field

The utility model relates to the field of building structures, in particular to a stair platform structure for building reinforcement and reconstruction.

Background

Because the reason of floor height and bench span, the building is very nervous on stair are arranged occasionally, stair can't directly run to the one deck from a certain one deck through a bench, need set up the ladder platform between two floors, it supports the stair board to set up both ends about ladder mouth roof beam and the formation of floor department's ladder roof beam on the ladder platform, the design is to the height consideration of platform ladder roof beam inadequately lead to the unable meeting of net height under the ladder platform roof beam to require, if satisfy ladder platform department's net height requirement through the part that removes the ladder roof beam downward protrusion ladder platform board, can lead to stair board atress reinforcing bar not have the support, the stair board becomes the structure of encorbelmenting by upper and lower both sides support, the stair board calculates length and increases, the unsatisfied atress requirement of stair board.

Disclosure of Invention

The utility model aims to overcome the defects and provides a stair landing structure.

In order to achieve the purpose, the utility model is realized by the following technical scheme: a stair landing structure comprises a stair landing, a stair landing downward stair section and a stair landing upward stair section, wherein a lower stair section edge beam used for supporting the stair landing downward stair section is arranged on the side surface of the stair landing downward stair section, and the lower stair section edge beam is arranged in a partition wall on the downward stair section edge of the stair landing; stair platform is to stair section side setting up and is used for supporting stair platform to go up the last stair section boundary beam of stair section, go up the stair section boundary beam and set up in the partition wall of stair platform to going up the stair section limit.

One end of the landing downward stair section is anchored into the side beam of the landing downward stair section through a steel bar, and one end of the landing upward stair section is anchored into the side beam of the landing upward stair section through a steel bar.

Under the condition of not increasing the thickness of the stair plates, the stair plates supported by the upper end and the lower end are changed into overhanging stair plates by utilizing the mechanical principle, the net height of the stair platform is increased by canceling the landing stair girders or chiseling the downward projecting parts of the stair girders at the landing, the vertical arrangement of the stairs is not changed, and the arrangement requirement of the building stairs is met.

The utility model is also suitable for the situation that the net height under the platform of the newly-built project is more tense.

Drawings

Fig. 1 is a plan view of an original staircase.

Fig. 2 is a plan view of the platform chiseling down the bench section.

Fig. 3 is a plan view of the platform with the riser chiseling away.

FIG. 4 is a plan view of a new edge beam added on a staircase and an edge beam added on a storey.

Fig. 5 is a sectional view taken along line a-a in fig. 1 (a sectional view taken along a downward step of the platform).

Fig. 6 is a sectional view taken along line B-B in fig. 1 (a sectional view taken along an upward step of the platform).

Fig. 7 is a reinforcing bar extension anchoring diagram of a downward bench of the platform.

Fig. 8 is a reinforcing bar extension anchoring diagram of a stair tread of an ascending stair section of a platform.

Fig. 9 is a chiseling view of the landing ladder sill beam.

1-downward bench of platform, 2-upward bench of platform, 3-platform ladder way roof beam, 4-newly-increased boundary beam, 5-the floor department increases the boundary beam, 6-downward bench of former platform ladder board horizontal reinforcement, 6 a-upward bench of former platform ladder board horizontal reinforcement, 7-downward bench of platform newly-increased ladder board upper portion reinforcing bar, 8-downward bench of platform newly-increased ladder board lower part reinforcing bar, 7 a-upward bench of platform newly-increased ladder board upper portion reinforcing bar, 8 a-upward bench of platform newly-increased ladder board lower part reinforcing bar, 9-downward bench of former platform concrete chisel (shadow zone board top 500mm is wide, board bottom 200mm is wide), 9 a-upward bench of former platform concrete chisel (shadow zone board top 500mm is wide, board bottom 200mm is wide), 10-the ladder way roof beam is chiseled the part.

Detailed Description

The utility model is further illustrated by the following specific examples. Wherein the showings are for the purpose of illustration only and not for the purpose of limiting the same, and are shown in the drawings and are not to be considered limiting; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The stair platform comprises a stair platform, a stair platform downward stair section 1 and a stair platform upward stair section 2, wherein a lower stair section edge beam 4 used for supporting the stair platform downward stair section 1 is arranged on the side surface of the stair platform downward stair section 1, and an upper stair section edge beam 5 used for supporting the stair platform upward stair section 2 is arranged on the side surface of the stair platform upward stair section 2.

The platform is anchored into the lower stair section boundary beam 4 through the reinforcing steel bar towards one end of the lower stair section 1, and the platform is anchored into the upper stair section boundary beam 5 through the reinforcing steel bar towards one end of the upper stair section 2.

The utility model is suitable for the situation that the net height under the ladder platform is more tense. The utility model changes the stair boards supported by the upper end and the lower end into overhanging stair boards by utilizing the mechanics principle.

For the existing structure with insufficient net height under the stair platform, the utility model can increase the net height at the stair platform by chiseling the downward projecting part of the stair beam at the platform without increasing the thickness of the stair plates, the vertical arrangement of the stairs is not changed, the arrangement requirement of the building stairs is met, and the implementation steps are as follows:

1) supporting and fixing a landing, a downward stair section of the landing and an upward stair section of the landing;

2) newly adding a boundary beam into the partition wall on the side surface of the downward stair section of the stair platform, and fixing the newly added boundary beam in the frame column on the side surface of the downward stair section of the stair; increase last floor department boundary beam, guarantee to go up the bench section and be totally in the last floor department boundary beam height-range after increasing:

(1) installing a stair platform downward bench section boundary beam template and binding a newly added boundary beam steel bar;

(2) stripping the concrete on the surface layer of the upper board edge of the downward stair section of the stair platform to expose the reinforcing steel bars; stripping the concrete on the side surface layer of the lower plate of the downward bench of the platform to expose the reinforcing steel bars;

(3) one end of the steel bar at the upper part of the ladder plate of the downward ladder section of the newly-added ladder platform is anchored into the newly-added boundary beam template, and the other end of the steel bar is connected with the horizontal steel bar exposed out of the upper part of the downward ladder section of the platform; one end of a steel bar at the lower part of the ladder plate of the downward ladder section of the newly-added ladder platform is anchored into the newly-added boundary beam template, and the other end of the steel bar is connected with a horizontal steel bar exposed at the lower part of the downward ladder section of the platform;

(4) installing a template of which the upper floor is required to be heightened to bind reinforcing steel bars;

(5) stripping the concrete on the side surface layer of the upper board of the upward bench section of the platform to expose the reinforcing steel bars; stripping the concrete on the side surface layer of the lower plate of the upward stair section of the platform to expose the reinforcing steel bars;

(6) newly-added ladder platform goes up ladder section upper portion reinforcing bar, one end anchors into heightening boundary beam template in the floor, another end and platform go up ladder section horizontal reinforcement connection that upper portion exposes; newly-added ladder platform goes up ladder section step lower part reinforcing bar, one end anchors into heightening boundary beam template of floor, another end and platform go up ladder section horizontal muscle that lower part expose connect;

(7) and pouring concrete at the newly added boundary beam, the added boundary beam at the storey and the stripped part of the bench.

(8) And (4) dismantling all the templates after the concrete strength reaches 100%.

(9) And chiseling the downward convex part of the landing ladder way beam.

Stair include terraced platform, the downward bench section of terraced platform, the bench section that goes up of terraced platform, platform ladder mouth roof beam, newly-increased boundary beam, the floor department increases the boundary beam, the downward bench board horizontal reinforcement of former platform, the upward bench board horizontal reinforcement of former platform, the downward bench section of platform newly-increased board upper portion reinforcing bar, the downward bench section of platform newly-increased board lower part reinforcing bar, the upward bench section of platform newly-increased board upper portion reinforcing bar, the upward bench section of platform newly-increased board lower part reinforcing bar, the downward bench section concrete chiseling of former platform, the upward bench section concrete chiseling of former platform, the ladder mouth roof beam is chiseled the part.

The newly-added boundary beam and the heightened boundary beam at the floor respectively support the downward stair section and the upward stair section of the platform;

after the local concrete of the downward stair section and the upward stair section of the platform is chiseled off, anchoring the upper reinforcing steel bars of the newly-added stair boards and the lower reinforcing steel bars of the newly-added stair boards into the newly-added boundary beams and the added high beams at the floors;

concrete at the positions of the newly added side beams, the heightening beams at the floors, the downward bench of the platform and the upward bench of the platform where the chiseling is partially removed is poured simultaneously;

lower supports must be made before the strength of the cast concrete reaches 100% for the newly added boundary beam and the heightened boundary beam at the floor, the downward bench section of the platform and the upward bench section of the platform;

chiseling off the chiseled part of the ladder way beam below the platform ladder way beam after the strength of concrete poured on the newly added side beam and the floor is increased to 100 percent and the strength of concrete poured on the downward ladder section and the upward ladder section of the platform is chiseled off;

in the embodiment, as shown in fig. 1-9, the elevation H + Δ H1 at the landing of the stair is 2.216m, the elevation H at the floor is ± 0.000m, the thickness of the landing ascending stair section 2 is 0.140m, the height of the landing stair nosing beam 3 is 0.250m, the net height H2 below the landing stair nosing beam 3 is 1.966m, and the net height H1 below the landing stair nosing beam 3 after treatment according to the utility model is 2.076m, so that the specification requirement is met.

The utility model relates to an embodiment of processing insufficient clear height of a stair platform, which comprises the following construction steps:

(1) supporting and fixing a downward bench section 1 and an upward bench section 2 of the platform to be reformed on a floor slab with the thickness of +/-0.000 m;

(2) installing a newly-added boundary beam 4 template in the partition wall on the side surface of the downward bench 1, binding reinforcing steel bars, and fixing the newly-added boundary beam 4 after pouring in the frame column on the side surface of the downward bench 1;

(3) stripping the concrete on the 500mm wide surface layer of the upper plate edge of the lower step plate 1 of the platform to expose the reinforcing steel bars; stripping the concrete on the 200mm wide surface layer of the lower plate edge of the lower step plate 1 of the platform to expose the reinforcing steel bars;

(4) one end of a steel bar 7 at the upper part of the newly-increased ladder board is anchored into the newly-increased boundary beam 4, and the other end of the steel bar is connected with a horizontal bar 6 of the platform exposed to the upper part of the lower ladder board 1; one end of a steel bar 8 at the lower part of the newly-increased ladder board is anchored into the newly-increased boundary beam 4, and the other end of the steel bar is connected with a horizontal bar 6 of the platform exposed to the lower part of the lower ladder board 1;

(5) installing a template of the boundary beam 5 to be heightened at the floor on the original boundary beam at the previous floor, and binding reinforcing steel bars;

(6) stripping the concrete on the 500mm wide surface layer of the upper plate edge of the upper stair plate 2 of the platform to expose the reinforcing steel bars; stripping the concrete on the 200mm wide surface layer of the lower plate edge of the upper stair plate 2 of the platform to expose the reinforcing steel bars;

(7) one end of the steel bar 7a at the upper part of the newly-added step plate is anchored into the heightening boundary beam 5 at the floor, and the other end is connected with the horizontal bar 6a of the platform exposed to the upper part of the upper step plate 2; one end of the steel bar 8a at the upper part of the newly-added step plate is anchored into the heightening boundary beam 5 at the floor, and the other end is connected with the horizontal bar 6a of the platform exposed to the lower part of the upper step plate 2;

(8) and pouring concrete at the newly added edge beam 4, the heightened edge beam 5 at the floor and the stripping part of the step plate.

(9) And (4) removing the template after the concrete strength grade reaches 100%.

(10) The lower protruding part 10 of the landing ladder beam 3 is chiseled.

The examples are only for the purpose of clearly illustrating the salient features of the present patent, and are not intended to limit the embodiments of the present patent. It will be apparent to those skilled in the art that other variations and modifications may be made in the utility model without the use of the foregoing teachings and without the exercise of inventive faculty, and yet fall within the scope of the claims of this invention.

Claims

1. The utility model provides a stair platform structure, includes ladder platform, stair platform downward bench and stair platform upward bench, its characterized in that: the side surface of the downward stair section of the stair platform is provided with a lower stair section edge beam for supporting the downward stair section of the stair platform, and the lower stair section edge beam is arranged in a partition wall at the side of the downward stair section of the stair platform; stair platform is to stair section side setting up and is used for supporting stair platform to go up the last stair section boundary beam of stair section, go up the stair section boundary beam and set up in the partition wall of stair platform to going up the stair section limit.

2. A stair platform structure according to claim 1, wherein: one end of the stair platform going to the lower stair section is anchored into the lower stair section boundary beam through the steel bar, and one end of the stair platform going to the upper stair section is anchored into the upper stair section boundary beam through the steel bar.