CN112523443A - Ultra-high performance concrete assembled light and thin prefabricated staircase and assembling process thereof - Google Patents
Ultra-high performance concrete assembled light and thin prefabricated staircase and assembling process thereof Download PDFInfo
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- CN112523443A CN112523443A CN202011442269.7A CN202011442269A CN112523443A CN 112523443 A CN112523443 A CN 112523443A CN 202011442269 A CN202011442269 A CN 202011442269A CN 112523443 A CN112523443 A CN 112523443A
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- performance concrete
- high performance
- platform
- prefabricated staircase
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
- E04F11/035—Stairways consisting of a plurality of assembled modular parts without further support
Abstract
The invention discloses an ultra-high performance concrete assembled light and thin prefabricated staircase and an assembly process thereof. The invention has simple structure, and provides a design scheme that steps, platforms, ladder beams and connecting parts can be prefabricated independently, so that the stair parts can be assembled after being transported to a construction site, and the problems of heavy self weight, large volume and inconvenient transportation of the traditional prefabricated stair are solved; the problem that the stair mold is large in size and inflexible in adjustment is also solved; by utilizing the ultrahigh strength, ultrahigh toughness and ultrahigh durability of the ultrahigh-performance concrete, the cross-sectional dimension of the stair component is reduced to reduce the dead weight and the cost on the premise of meeting the bearing capacity and normal use conditions of the stair.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to an ultra-high performance concrete assembled light and thin prefabricated staircase and an assembling process thereof.
Background
The building industrialization is an important mode for improving the labor efficiency and the building quality, and is also a development direction of future building industry in China. Prefabricated construction is one of the representatives of the building industrialization, and national and local governments have issued a series of policies to promote the rapid development of high quality. A large number of building parts of the assembly type building are produced and processed by a workshop, so that the production efficiency can be improved, and the assembly type building is energy-saving and environment-friendly.
The prefabricated staircase is widely applied to fabricated buildings under the large background of building industrialization. At present, the reinforced concrete stairs built according to the current prefabricated stair atlas and standard in China have heavy dead weight and consume more materials, so that the construction cost is high, the size of the mould is large, the adjustment is not flexible, and the transportation and the hoisting are difficult.
Disclosure of Invention
Aiming at the problems, the invention aims to provide an ultra-high performance concrete assembled light and thin prefabricated staircase and an assembling process thereof.
The technical scheme of the invention is as follows:
on the one hand, the prefabricated staircase comprises steps, a platform, a ladder beam and a connecting part, wherein the steps, the platform, the ladder beam and the connecting part are all prefabricated parts and are manufactured by assembling and connecting.
Preferably, the step is constructed in any one of an L-shaped, a Z-shaped, a flat plate type and a wave type; the platform is an L-shaped thin plate or a flat plate; the ladder beam is constructed in any one of a rectangular solid beam, a rectangular hollow beam and a sawtooth beam.
Preferably, the step has a height-to-length ratio of 0.02 to 0.05.
Preferably, the upper surface of the step and/or the platform is provided with an anti-skid groove.
Preferably, the upper surface of the step and/or the platform is provided with a railing fixing pile.
Preferably, the steps, the platform and the ladder beam are provided with reserved holes, and the connecting part is any one of a bolt, a reserved inclined rod and a reserved steel bar.
Preferably, steel bars, I-shaped steel or steel pipes are arranged in the steps, the platforms and the ladder beams.
Preferably, the physical and mechanical performance indexes of the ultra-high performance concrete are that the compressive strength is more than or equal to 120MPa, the breaking strength is more than or equal to 12MPa, the axial tensile strength is more than or equal to 5MPa, the static compression elastic modulus is more than or equal to 40GPa, and the Poisson ratio is 0.19-0.24.
Preferably, the ultra-high performance concrete comprises the following components: 1 part of cement, 0.1-0.3 part of mineral powder, 0.1-0.3 part of fly ash micro-beads, 0.1-0.25 part of silica fume, 0.005-0.025 part of nano-silica, 1.5-2.0 parts of fine aggregate, 0.2-0.35 part of steel fibers, 0.015-0.03 part of additive and 0.22-0.32 part of water.
On the other hand, the assembling process of the ultra-high performance concrete assembled light and thin prefabricated staircase comprises the following steps: preparing the ultra-high performance concrete; preparing a mould, and respectively and independently pouring and molding the steps, the platform and the ladder beam; the steps, the platforms and the ladder beams are connected through connecting parts by adopting a bolt, welding or wet joint mode corresponding to the connecting parts.
The invention has the beneficial effects that:
the invention has simple structure, and provides a design scheme that steps, platforms, ladder beams and connecting parts can be prefabricated independently, so that the stair parts can be assembled after being transported to a construction site, and the problems of heavy self weight, large volume and inconvenient transportation of the traditional prefabricated stair are solved; the problem that the stair mold is large in size and inflexible in adjustment is also solved; by utilizing the ultrahigh strength, ultrahigh toughness and ultrahigh durability of the ultrahigh-performance concrete, the cross-sectional dimension of the stair component is reduced to reduce the dead weight and the cost on the premise of meeting the bearing capacity and normal use conditions of the stair.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of an embodiment of an ultra-high performance concrete fabricated lightweight and thin prefabricated staircase according to the present invention;
FIG. 2 is a schematic structural view of the step of FIG. 1;
FIG. 3 is a schematic structural diagram of the platform in the embodiment of FIG. 1;
fig. 4 is a schematic structural view of another embodiment of the ultra-high performance concrete fabricated lightweight and thin prefabricated staircase according to the present invention;
FIG. 5 is a partial schematic structural view of the step and the ladder beam of the embodiment of FIG. 4;
fig. 6 is a schematic structural diagram of the platform in the embodiment of fig. 4.
Reference numbers in the figures: 1-step, 2-platform, 3-ladder beam, 4-connecting part, 5-antiskid groove, 6-railing fixing pile and 7-connecting hole.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
It should be noted that, in the present application, the embodiments and the technical features of the embodiments may be combined with each other without conflict.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, the terms "first", "second", and the like are used for distinguishing similar objects, but not for describing a particular order or sequence order, unless otherwise specified. It is to be understood that the terms so used; the terms "upper", "lower", "left", "right", and the like are used generally with respect to the orientation shown in the drawings, or with respect to the component itself in a vertical, or gravitational orientation; likewise, "inner", "outer", and the like refer to the inner and outer relative to the contours of the components themselves for ease of understanding and description. The above directional terms are not intended to limit the present invention.
As shown in fig. 1 to 6, in one aspect, the present invention provides an ultra-high performance concrete assembled lightweight and thin prefabricated staircase, which comprises steps 1, a platform 2, ladder beams 3 and connecting parts 4, wherein the prefabricated staircase is made of ultra-high performance concrete, the steps 1, the platform 2, the ladder beams 3 and the connecting parts 4 are all prefabricated parts, and the prefabricated staircase is made by assembling and connecting.
In the embodiment, the stair is made of the ultra-high performance concrete, so that the consumption of the concrete is less on the premise of meeting the bearing capacity and normal use conditions of the stair, and the self weight of the stair is reduced; in addition, the steps, the platforms, the ladder beams and the connecting parts are all set into prefabricated parts, and the prefabricated parts can be firstly transported to a construction site and then assembled, so that the problems that the traditional prefabricated staircase is heavy in weight and inconvenient to transport due to large volume are solved, and the problem that a staircase mold is large in volume and cannot be flexibly adjusted is solved.
In a specific embodiment, the step 1 is constructed in any one of an L-shaped form, a Z-shaped form, a flat form and a wave form; the platform 2 is an L-shaped thin plate or a flat plate; the ladder beam 3 is in any one of a rectangular solid beam, a rectangular hollow beam and a sawtooth beam; step 1, platform 2 and ladder roof beam 3 are equipped with the preformed hole, adapting unit 4 is the bolt, reserves the down tube and reserves arbitrary one in the reinforcing bar.
In a specific embodiment, the height-to-length ratio of the step 1 is 0.02-0.05, the upper surfaces of the step 1 and/or the platform 2 are provided with anti-skid grooves 5 and railing fixing piles 6, reinforcing steel bars, i-beams or steel pipes are arranged in the step 1, the platform 2 and the ladder beam 3, and the prefabricated parts can be prevented from moving laterally by the aid of the built-in reinforcing steel bars, i-beams or steel pipes.
In a specific embodiment, the physical and mechanical performance indexes of the ultra-high performance concrete are that the compressive strength is greater than or equal to 120MPa, the breaking strength is greater than or equal to 12MPa, the axial tensile strength is greater than or equal to 5MPa, the static compression elastic modulus is greater than or equal to 40GPa, and the Poisson ratio is 0.19-0.24.
Optionally, the ultra-high performance concrete comprises the following components: 1 part of cement, 0.1-0.3 part of mineral powder, 0.1-0.3 part of fly ash micro-beads, 0.1-0.25 part of silica fume, 0.005-0.025 part of nano-silica, 1.5-2.0 parts of fine aggregate, 0.2-0.35 part of steel fibers, 0.015-0.03 part of additive and 0.22-0.32 part of water.
It should be noted that other ultrahigh performance concrete in the prior art or other ultrahigh performance concrete capable of meeting the above physical and mechanical performance indexes in the prior art can also be adopted in the invention.
In a specific embodiment, the physical and mechanical performance indexes of the ultra-high performance concrete are as follows: the compression strength is 135MPa, the breaking strength is 16MPa, the axial tensile strength is 7MPa, the static compression elastic modulus is 42GPa, and the Poisson ratio is 0.2. The prefabricated staircase is assembled by Z type 1, L type platform 2 and connecting bolt 4 and forms by the Z type, and the lower flat board of two adjacent Z type 1 of marking time is regarded as with the part that the riser formed ladder beam 3. Z type 1's length-to-height ratio of marking time is 0.02, and the upper surface is equipped with anti-skidding recess 5 and railing spud pile 6, and two adjacent Z types are marked time between 1, and the Z type is marked time between 1 and the platform 2 and all is connected through high strength bolt 4, L type platform 2 still embeds has reserved reinforcing bar or other reserved bolt hole, through reserved reinforcing bar or other reserved bolt hole make L type platform 2 links to each other with outside load-carrying members.
In another specific embodiment, different from the above embodiment, the prefabricated staircase is formed by assembling an L-shaped step 1, a flat platform 2 and a sawtooth-shaped ladder beam 3, wherein the L-shaped step 1 and the flat platform 2 are both provided with an anti-skid groove 5 and a railing fixing pile 6, the L-shaped step 1, the flat platform 2 and the sawtooth-shaped ladder beam 3 are all provided with a connecting hole 7, the L-shaped step 1 and the sawtooth-shaped ladder beam 3, and the flat platform 2 and the sawtooth-shaped ladder beam 3 are all connected through a high-strength bolt 4, and the connecting hole 7 is filled with ultra-high-performance concrete to fix the L-shaped step 1, and the flat platform 2 is further internally provided with a reserved steel bar and a reserved bolt hole and connected to an external bearing structure.
On the other hand, the invention also provides an assembly process of the ultra-high performance concrete assembled light and thin prefabricated staircase, which comprises the following steps:
s1: preparing the ultra-high performance concrete: weighing material components required by the ultra-high performance concrete according to 1 part of cement, 0.3 part of mineral powder, 0.1 part of fly ash microbeads, 0.25 part of silica fume, 0.015 part of nano silicon dioxide, 1.8 parts of fine aggregates, 0.35 part of steel fibers, 0.015 part of additives and 0.3 part of water, firstly preparing the ultra-high performance concrete dry powder with good homogeneity, secondly pouring the ultra-high performance concrete dry powder into a common forced mixer, adding the weighed water and the additives, uniformly stirring to prepare a slurry material, uniformly adding the weighed steel fibers into the slurry material, and uniformly stirring to prepare the ultra-high performance concrete slurry.
S2: and respectively pouring the prepared ultrahigh-performance concrete into prepared step, platform and ladder beam moulds.
S3: and removing the mold after the slurry is hardened, and then connecting a certain number of steps, two platforms and the ladder beam through bolts, welding or wet seams and the like to obtain the prefabricated staircase. Specifically, if mark time, platform and be equipped with on the ladder roof beam and reserve the bolt hole, then select for use the bolt to carry out bolted connection as adapting unit, if mark time and ladder roof beam built-in reserve reinforcing bar or reserve the down tube, then set up the connecting hole on the platform, during the equipment connection, will reserve the reinforcing bar or reserve the down tube and pass the connecting hole, then pour into ultra-high performance concrete thick liquids to the connecting hole and carry out sealing connection.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The ultra-high performance concrete assembled light and thin prefabricated staircase is characterized by comprising steps, a platform, a ladder beam and connecting parts, wherein the prefabricated staircase is made of ultra-high performance concrete, the steps, the platform, the ladder beam and the connecting parts are all prefabricated parts, and the prefabricated staircase is manufactured through assembling and connecting.
2. The ultra-high performance concrete fabricated light and thin prefabricated staircase according to claim 1, wherein the treads are constructed in any one of an L-shape, a Z-shape, a flat plate shape and a wave shape; the platform is an L-shaped thin plate or a flat plate; the ladder beam is constructed in any one of a rectangular solid beam, a rectangular hollow beam and a sawtooth beam.
3. The ultra-high performance concrete fabricated lightweight and thin prefabricated staircase according to claim 1, wherein the height-to-length ratio of the tread is 0.02-0.05.
4. The ultra-high performance concrete fabricated light and thin prefabricated staircase according to claim 1, wherein the upper surface of the tread and/or the platform is provided with anti-slip grooves.
5. The ultra-high performance concrete fabricated lightweight prefabricated staircase according to claim 1, wherein the upper surface of the tread and/or the platform is provided with a railing fixing pile.
6. The ultra-high performance concrete fabricated light and thin prefabricated staircase according to claim 1, wherein the steps, the platform and the staircase beams are provided with reserved holes, and the connecting members are any one of bolts, reserved diagonal rods and reserved steel bars.
7. The ultra-high performance concrete assembled lightweight and thin prefabricated staircase according to claim 6, wherein steel bars, I-beams or steel pipes are embedded in the steps, the platform and the staircase beams.
8. The prefabricated light and thin stair of any one of claims 1-7, wherein the ultra-high performance concrete has physical and mechanical properties of compressive strength of 120MPa or more, flexural strength of 12MPa or more, axial tensile strength of 5MPa or more, static compressive modulus of elasticity of 40GPa or more, and Poisson's ratio of 0.19-0.24.
9. The ultra-high performance concrete fabricated light and thin prefabricated staircase according to claim 8, wherein the ultra-high performance concrete comprises the following components: 1 part of cement, 0.1-0.3 part of mineral powder, 0.1-0.3 part of fly ash micro-beads, 0.1-0.25 part of silica fume, 0.005-0.025 part of nano-silica, 1.5-2.0 parts of fine aggregate, 0.2-0.35 part of steel fibers, 0.015-0.03 part of additive and 0.22-0.32 part of water.
10. The assembling process of the ultra-high performance concrete assembled lightweight and thin prefabricated staircase according to any one of claims 1 to 9, comprising the steps of:
preparing the ultra-high performance concrete;
preparing a mould, and respectively and independently pouring and molding the steps, the platform and the ladder beam;
the steps, the platforms and the ladder beams are connected through connecting parts by adopting a bolt, welding or wet joint mode corresponding to the connecting parts.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011442269.7A CN112523443A (en) | 2020-12-08 | 2020-12-08 | Ultra-high performance concrete assembled light and thin prefabricated staircase and assembling process thereof |
| PCT/CN2021/117347 WO2022121407A1 (en) | 2020-12-08 | 2021-09-09 | Ultra-high performance concrete assembly-type light and thin prefabricated staircase and assembly process therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011442269.7A CN112523443A (en) | 2020-12-08 | 2020-12-08 | Ultra-high performance concrete assembled light and thin prefabricated staircase and assembling process thereof |
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| CN112523443A true CN112523443A (en) | 2021-03-19 |
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| CN202011442269.7A Pending CN112523443A (en) | 2020-12-08 | 2020-12-08 | Ultra-high performance concrete assembled light and thin prefabricated staircase and assembling process thereof |
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| CN (1) | CN112523443A (en) |
| WO (1) | WO2022121407A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112663882A (en) * | 2020-12-08 | 2021-04-16 | 中建西部建设股份有限公司 | Light and thin type beam type prefabricated staircase made of ultra-high performance concrete and forming process thereof |
| CN113062542A (en) * | 2021-04-02 | 2021-07-02 | 石江余 | Assembled building steel structure stair connected node |
| CN113445468A (en) * | 2021-07-05 | 2021-09-28 | 中交第三航务工程勘察设计院有限公司 | Offshore wharf water escape channel based on stiff structure |
| CN113668793A (en) * | 2021-08-24 | 2021-11-19 | 温州设计集团有限公司 | UHPC prefabricated staircase with built-in FRP grid and construction method thereof |
| WO2022121407A1 (en) * | 2020-12-08 | 2022-06-16 | 中建西部建设建材科学研究院有限公司 | Ultra-high performance concrete assembly-type light and thin prefabricated staircase and assembly process therefor |
| CN114875959A (en) * | 2021-12-01 | 2022-08-09 | 广州华隧威预制件有限公司 | Assembled subway platform and construction method thereof |
Families Citing this family (1)
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|---|---|---|---|---|
| CN115259793A (en) * | 2022-07-29 | 2022-11-01 | 长安大学 | Ultrahigh-performance concrete for preventing high-temperature bursting and preparation method thereof |
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| CN112663882A (en) * | 2020-12-08 | 2021-04-16 | 中建西部建设股份有限公司 | Light and thin type beam type prefabricated staircase made of ultra-high performance concrete and forming process thereof |
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| CN113062542A (en) * | 2021-04-02 | 2021-07-02 | 石江余 | Assembled building steel structure stair connected node |
| CN113445468A (en) * | 2021-07-05 | 2021-09-28 | 中交第三航务工程勘察设计院有限公司 | Offshore wharf water escape channel based on stiff structure |
| CN113668793A (en) * | 2021-08-24 | 2021-11-19 | 温州设计集团有限公司 | UHPC prefabricated staircase with built-in FRP grid and construction method thereof |
| CN114875959A (en) * | 2021-12-01 | 2022-08-09 | 广州华隧威预制件有限公司 | Assembled subway platform and construction method thereof |
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| Publication number | Publication date |
|---|---|
| WO2022121407A1 (en) | 2022-06-16 |
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