CN112900764A

CN112900764A - Light assembled stair with steel bar truss

Info

Publication number: CN112900764A
Application number: CN202110275900.7A
Authority: CN
Inventors: 白久林; 谢彬; 陈辉明; 胡少伟; 杨经纬; 金双双
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-06-04

Abstract

The invention discloses a light assembly type stair with a steel bar truss, and belongs to the technical field of prefabricated building components. Comprises a ladder section beam and a step plate; the ladder section beam consists of an upper lapping platform, a common platform stage and a lower lapping platform, the upper lapping platform and the lower lapping platform are used for connecting the ladder section beam and the rest platform beam, and the common step section is used for placing a step plate; the step plate consists of a steel bar truss and a concrete plate, and the steel bar truss is inversely embedded in the concrete plate; the connection mounting hole is seted up to the step board tip, and the bench roof beam is at the pre-buried tip threaded screw rod of ordinary step section, inserts the connection mounting hole of step board with pre-buried screw rod, and the screw rod is twisted to the nut, realizes the connection of step board and bench roof beam. The steel bar trusses are embedded in the step plates in an inverted mode, so that the rigidity of the step plates is improved, the thickness of the step plates can be reduced, and the light weight of the assembled stair is realized; meanwhile, the assembly type stair is convenient and simple to install, can accelerate the construction progress, and has good economic benefits.

Description

Light assembled stair with steel bar truss

Technical Field

The invention relates to the technical field of prefabricated building components, in particular to a light assembly type stair with a steel bar truss.

Background

The stairway is used as a main vertical traffic junction of a building, is an important passage for safe evacuation, and has self-evident importance. The stair in the traditional building mostly adopts the cast-in-place concrete stair of job site, need formwork, lay the reinforcing bar when the construction, then concreting, this kind of construction form of cast in-place stair, the construction process is loaded down with trivial details, leads to the efficiency of construction lower. Therefore, in recent years, with the continuous development of building technology, the use of prefabricated staircases has been greatly popularized, and the prefabricated staircases can reduce on-site wet operation, accelerate the construction progress and improve the industrialization degree through the modes of factory prefabrication and on-site installation.

The prefabricated staircase in the engineering is roughly divided into a prefabricated plate type staircase and a prefabricated beam type staircase. The solid prefabricated stair tread of a monoblock is adopted mostly to the prefabricated plate stair of prior art, and this solid prefabricated stair tread takes to form prefabricated plate stair on the platform roof beam, and the whole weight of the solid prefabricated stair tread of a monoblock is heavier, generally more than 2 tons, so require strictly to equipment such as the hoist of construction unit, and this leads to prefabricated plate stair extremely inconvenient in the aspect of transportation and hoist and mount etc to make the popularization of prefabricated plate stair have certain limitation. Prefabricated beam type stair generally include prefabricated step board, prefabricated sloping and platform roof beam, prefabricated step board end is arranged in on the prefabricated sloping to the founding is the bench, then arranges the bench roof beam in on the platform roof beam, forms prefabricated beam type stair, prefabricated beam type stair are owing to decompose into the prefabricated step board of polylith with the stair board, so single prefabricated step board weight is lower, is suitable for conventional small-tonnage tower crane hoist and mount, and this makes this kind of prefabricated stair have very big practicality, and popularization nature is strong.

Based on this background, the urgent need develops a neotype light assembled beam type stair, through decomposing into the prefabricated flier of polylith with a monoblock stair board, improves the rigidity of prefabricated flier simultaneously at the pre-buried steel bar truss of invering in prefabricated flier, and then reduces the thickness of prefabricated flier to greatly reduced stair board dead weight. This assembled stair of light both can solve the loaded down with trivial details problem of cast-in-place stair construction, and this prefabricated stair of light is convenient for transport and hoist and mount simultaneously improves the installation effectiveness.

Disclosure of Invention

In view of the above, the invention aims to provide a light assembly type stair with a steel bar truss, so as to solve the technical problems that cast-in-place stairs are complicated to construct, prefabricated stairs are heavy in weight and the like.

The invention adopts the following technical scheme:

the invention provides a light assembly type stair with a steel bar truss, which comprises a left stair section beam, a right stair section beam and a step plate.

The left ladder section beam comprises an upper lap joint platform, a common step section and a lower lap joint platform; the upper lapping platform and the lower lapping platform are both reserved with lapping mounting holes for connecting the left bench beam with the rest platform beam; a threaded screw rod is embedded in the side edge of each step in the common platform stage, the threaded end is exposed, and the embedded screw rod is used for connecting the left step beam and the step plate.

The right bench beam is constructed the same as the left bench beam.

The step plate comprises a steel bar truss and a concrete plate; the steel bar truss is formed by welding steel bars, and is inversely embedded in the concrete slab; the step plate is reserved with connecting mounting holes at two ends for connecting the ladder section beam with the step plate.

The step plate is provided with guardrail mounting holes at two ends at intervals of one step.

The ladder section beam is connected with the step plate by inserting the embedded screw into the connecting and mounting hole of the step plate and screwing the nut into the embedded screw.

The light fabricated stair with the steel bar truss has the advantages that the technical problems that cast-in-place stairs are complex in construction, prefabricated stairs are heavy in weight and the like are solved. This light assembled stair is in the on-the-spot installation stage, and the upper and lower overlap joint platform with prefabricated bench beam is connected with the rest platform roof beam, treats left bench beam and right bench beam fixed after, prefabricated step board is placed one by one and is installed at the ordinary bench section of bench beam, and further, the embedded steel bar truss of step board inversion exposes partial spraying fire prevention and anticorrosive material, and whole installation process is convenient simple. Meanwhile, the steel bar trusses are embedded in the step plates in an inverted mode, the rigidity of the step plates is improved, the thickness of the step plates can be reduced, the light weight of the assembled stair is achieved, the assembled stair is convenient to transport and hoist, and good economic benefits are achieved.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of a left ladder section beam;

FIG. 3 is a schematic view of a right ladder section beam;

FIG. 4 is a side view of the left ladder section beam;

FIG. 5 is a schematic view of the step plate;

FIG. 6 is a cross-sectional view of the step plate;

fig. 7 is a schematic view of the embedded screw and the nut.

In the figure: the prefabricated staircase comprises a light prefabricated staircase 1, a left stair section beam 2, an upper lapping platform 201, a common stair section 202, a lower lapping platform 203, embedded screws 204, lapping mounting holes 205, a right stair section beam 3, an upper lapping platform 301, a common stair section 302, a lower lapping platform 303, embedded screws 304, lapping mounting holes 305, a step plate 4, a steel bar truss 401, a concrete plate 402, connecting mounting holes 403, guardrail mounting holes 404 and nuts 5.

Detailed Description

The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.

Example (b):

the embodiment discloses a take steel bar truss's light assembled stair, its characterized in that: comprises a left ladder section beam 2, a right ladder section beam 3 and a tread 4.

Referring to fig. 2 and 4, the left bench beam 2 comprises an upper lap-joint platform 201, a common step section 202 and a lower lap-joint platform 203; both the upper lapping platform 201 and the lower lapping platform 203 are reserved with lapping mounting holes 205 for connecting the left bench beam 2 with a rest platform beam; in the common platform stage 202, a threaded screw 204 with a thread at the end part is embedded in the side edge of each step, the threaded end is exposed, and the embedded screw is used for connecting the left step beam 2 and the step plate 4.

Referring to fig. 3 and 4, the right ladder section beam 3 is constructed like the left ladder section beam 2.

Referring to fig. 5 and 6, the step plate 4 comprises a steel bar truss 401 and a concrete plate 402; the steel bar truss 401 is formed by welding steel bars, and the steel bar truss 401 is inversely embedded in the concrete slab 402; connecting and mounting holes 403 are reserved at two ends of the step plate 4 and used for connecting the ladder section beam with the step plate 4; the step plate 4 is provided with guardrail mounting holes 404 at two ends at intervals of one step.

The lap joint groove is reserved in the rest platform beam, the size of the lap joint groove is matched with the size of the upper lap joint platform and the lower lap joint platform in the bench beam, furthermore, a threaded screw rod is embedded in the lap joint groove, the threaded end is exposed, and the embedded screw rod is used for connecting the rest platform beam and the bench beam.

The bench beam is connected with the rest platform beam by inserting the embedded screw in the rest platform beam preformed groove into the lap joint mounting hole of the upper lap joint platform and the lower lap joint platform and screwing the nut into the embedded screw.

The ladder section beam is connected with the step plate by inserting the embedded screw rod in the common platform stage into the connecting and mounting hole of the step plate and screwing the nut into the embedded screw rod.

During construction, the upper and lower lap joint platforms of the prefabricated bench beams are connected with the rest platform beams, after the left bench beam and the right bench beam are fixed, the prefabricated step plates are placed one by one in the common step sections of the bench beams to be installed, and further, the exposed parts of the steel bar trusses embedded in the inverted step plates are sprayed with fireproof and anticorrosive materials.

Claims

1. A light-weight assembled staircase with a reinforced truss is characterized in that: comprising a left ladder section beam (2), a right ladder section beam (3) and a tread plate (4);

The left ladder section beam (2) includes an upper overlapping platform (201), a common platform stage (202) and a lower overlapping platform (203); the upper overlapping platform (201) and the lower overlapping platform ( 203) lap mounting holes (205) are reserved for the connection of the left stair section beam (2) and the rest platform beam; the common platform stage (202) is pre-embedded at the side of each step with end bands A screw (204) with a thread, the screw end is exposed, and the screw is pre-embedded for the connection between the left ladder section beam (2) and the tread plate (4);

The structure of the right stair section beam (3) is the same as that of the left stair section beam (2);

The tread plate (4) includes a steel bar truss (401) and a concrete slab (402); the steel bar truss (401) is composed of welded steel bars, and the steel bar truss (401) is upside-down and pre-buried in the concrete slab (402); the The step board (4) has reserved connection and installation holes (403) at both ends for the connection between the stair section beam and the step board (4).

2. A light-weight assembled staircase with reinforced truss according to claim 1, characterized in that: the end of the step board (4) is provided with a connection and installation hole (403), and the stair section beam is pre-prepared in the common platform stage. Insert the embedded screw into the connection mounting hole (403) of the tread plate, and screw the nut (5) into the embedded screw to realize the connection between the tread plate (4) and the ladder section beam.

3 . The light-weight assembled staircase with steel trusses according to claim 1 , wherein the step board ( 4 ) is provided with guardrail installation holes ( 404 ) at every step at both ends. 4 .

4. The lightweight fabricated staircase with reinforced trusses according to claim 1, characterized in that: in the on-site installation stage of the lightweight fabricated staircase (1), the upper and lower parts of the prefabricated stair section beams are lapped up and down The connecting platform is connected with the rest platform beam. After the left stair section beam (2) and the right stair section beam (3) are fixed, the prefabricated tread plates (4) are placed one by one on the ordinary platform stage of the stair section beam. Installation, further, the exposed part of the upside-down pre-embedded steel truss (401) of the tread plate (4) is sprayed with fireproof and anti-corrosion materials.