CN111749450A - Safety protection construction method for large-span cast-in-situ dome - Google Patents
Safety protection construction method for large-span cast-in-situ dome Download PDFInfo
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- CN111749450A CN111749450A CN202010618742.6A CN202010618742A CN111749450A CN 111749450 A CN111749450 A CN 111749450A CN 202010618742 A CN202010618742 A CN 202010618742A CN 111749450 A CN111749450 A CN 111749450A
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- dome
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/24—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons
- E04G3/26—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons specially adapted for working on roofs
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
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- Mechanical Engineering (AREA)
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- Structural Engineering (AREA)
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Abstract
The invention discloses a safety protection construction method of a large-span cast-in-place dome.A dome operation platform is provided with an annular double-row protection frame close to an arc slope, annular operation surfaces are sequentially arranged on the double-row protection frame at certain intervals from bottom to top, and the arrangement of each layer of operation surface is synchronous with the construction of a dome main body; when an operation surface is erected, small cross rods are arranged on the double rows of protection frames, one ends of the small cross rods are outwards cantilevered to the arc surface of the dome and a certain space is reserved, the parts outwards cantilevered when the small cross rods are overhung for too long are supported by inclined struts, and the scaffold boards are laid on the parts outwards cantilevered by the small cross rods to form the operation surface; when the operation is carried out on the operation surface, the safety rope is hung on the upper layer of small cross rod, and for the operation surface on the top layer, the small cross rod is additionally arranged for hanging the safety rope and/or a baffle or a blocking net is arranged on one side of the double rows of protection frames close to the dome. The invention provides a multilayer operation platform for the construction of the large-gradient cast-in-place dome, does not influence the transportation of main construction materials, and is safe, reliable and simple to erect.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to a safety protection construction method of a large-span cast-in-place dome.
Technical Field
At present, for the construction of a large-span cast-in-place dome, the arc striking part of the dome is a steep arc surface, and the working face for people can not be provided, the periphery of the dome is a face surface, and the safety protection measures can not be provided, so that the construction risk can not be controlled, and therefore, how to set the safety protection during the construction of the large-span cast-in-place dome is very important.
Disclosure of Invention
The invention aims to provide a safety protection construction method of a large-span cast-in-place dome, which provides a multilayer operation platform for the construction of the large-gradient cast-in-place dome, meets the field requirement, does not influence the transportation of main construction materials, reduces the safety risk, and is simple to set up and convenient to operate.
The technical scheme adopted by the invention is as follows:
a safety protection construction method for a large-span cast-in-place dome is characterized in that annular double-row protection frames are erected on a dome operation platform close to an arc slope, annular operation surfaces are sequentially erected on the double-row protection frames at certain intervals from bottom to top, and the erection of each layer of operation surface is synchronous with the construction of a dome main body; when an operation surface is erected, small cross rods are arranged on the double rows of protection frames, one ends of the small cross rods are outwards cantilevered to the arc surface of the dome and a certain space is reserved, the parts outwards cantilevered when the small cross rods are overhung for too long are supported by inclined struts, and the scaffold boards are laid on the parts outwards cantilevered by the small cross rods to form the operation surface; when the operation is carried out on the operation surface, the safety rope is hung on the upper layer of small cross rod, and for the operation surface on the top layer, the small cross rod is additionally arranged for hanging the safety rope and/or a baffle or a blocking net is arranged on one side of the double rows of protection frames close to the dome.
Further, before construction, BIM modeling is carried out on the large-span cast-in-place dome, and a setting scheme of double rows of protective frames and a working face is simulated and verified.
Furthermore, when the double-row protection frame is erected, the upright rod positions of the double-row protection frame are positioned and popped up, then the base plate is laid at the upright rod position on the dome operation platform, and finally the double-row protection frame is erected.
Furthermore, a waist blocking rod is arranged on one side of the double-row protective frame close to the dome.
Furthermore, the scaffold board and the small cross bar are firmly bound through iron wires.
Furthermore, a space for roof building decoration and an operation space for workers are reserved between the overhanging end of the small cross rod and the arc surface.
Furthermore, on the double-row protective frame, wall connecting pieces are arranged every 1/4 circular arcs and extend into the roof girder.
Furthermore, annular operation surfaces are sequentially erected on the double rows of protection frames from bottom to top at intervals of 1.8 m.
Further, the radian of the arc part corresponding to the operation surface of the top layer is less than 45 degrees.
Further, the length of the overhanging end of the small cross rod from the nearest supporting point is not more than 0.5 m.
The invention has the beneficial effects that:
the conventional scaffold operation surface is moved to the position of the overhanging small cross rod from the middle operation platform of the double rows of protective frames and is closer to the arc surface, so that an operation platform is provided for the construction of a large-gradient cast-in-place dome, and the actual requirements on the site are met; the erection of the working surface and the construction of the dome main body are carried out synchronously, so that the annular inclined roof of each step is ensured to have the working surface, and the transfer of the construction materials of the main body is not influenced; when the safety rope works on the working surface, the safety rope can be hung on the upper layer of small cross rod, and for the working surface on the top layer, the small cross rod, the baffle or the blocking net can be additionally arranged, so that the working condition is improved, the safety risk is reduced, and the safety requirement of the working is met; in the method, the materials of the double rows of protection frames and the operation surface are all from the field, the erection is simple, and the operation is convenient; the working face is matched with the inclined strut to prop up the ground, and is firm and reliable.
Drawings
FIG. 1 is a schematic top view of an embodiment of the present invention in operation.
Fig. 2 is a schematic cross-sectional view of an embodiment of the present invention in operation.
Fig. 3 is a partially enlarged view of fig. 2.
In the figure: 1-a dome work platform; 2-a backing plate; 3-double rows of protection frames; 4-a small cross bar; 5-diagonal bracing; 6-scaffold board; 7-baffles or screens; 8-waist blocking rod; 9-wall connecting piece.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1 to 3, in the safety protection construction method of the large-span cast-in-place dome, an annular double-row protection frame 3 is erected on a dome operation platform 1 close to an arc slope, annular operation surfaces are sequentially erected on the double-row protection frame 3 at certain intervals from bottom to top, and the erection of each layer of operation surface is synchronous with the construction of a dome main body; when an operation surface is erected, the small cross rods 4 are installed on the double-row protection frames 3, one ends of the small cross rods 4 are outwards protruded to the arc surface of a dome and a certain space is reserved, the parts outwards protruded when the small cross rods 4 are outwards protruded too long are supported by the inclined struts 5, and the scaffold boards 6 are laid on the parts outwards protruded of the small cross rods 4 to form the operation surface; when the operation is carried out on the operation surface, the safety rope is hung on the upper layer of the small cross rod 4, for the operation surface on the top layer, one side of the double rows of protective frames 3 close to the dome is provided with a baffle or a blocking net 7, and the small cross rod 4 can be additionally arranged for hanging the safety rope.
During construction, first-order annular dome inclined roof formwork construction is carried out on the dome operation platform 1, a first layer operation surface is set up, after the first-order annular inclined roof formwork construction is completed, second-order annular inclined roof formwork construction is carried out on the first layer operation surface, a second layer operation surface is set up, after the second-order annular inclined roof formwork construction is completed, third-order annular inclined roof formwork construction is carried out on the second layer operation surface, and the operation surface setting and the dome main body construction are carried out synchronously through the steps.
According to the invention, the working surface of the conventional scaffold is moved to the position of the overhanging small cross rod 4 from the middle working platform of the double rows of protective frames 3 and is closer to the arc surface, so that a working platform is provided for the construction of a large-gradient cast-in-place dome, and the actual requirements on the site are met; the erection of the working surface and the construction of the dome main body are carried out synchronously, so that the annular inclined roof of each step is ensured to have the working surface, and the transfer of the construction materials of the main body is not influenced; when the operation is carried out on the operation surface, the safety rope can be hung on the upper layer of the small cross rod 4, and the small cross rod 4, the baffle or the blocking net 7 can be additionally arranged on the operation surface at the top layer, so that the operation condition is improved, the safety risk is reduced, and the operation safety requirement is met; in the method, the materials of the double-row protective frames 3 and the working surface are all from the field, so the method is simple to set up and convenient to operate; the working face is firmly and reliably supported by matching with the inclined strut 5.
In the embodiment, before construction, BIM modeling is carried out on the large-span cast-in-place dome, and the setting scheme of the double-row protective frames 3 and the working surface is simulated and verified, so that the construction efficiency can be improved.
In this embodiment, when the double rows of protection frames 3 are erected, the upright positions of the double rows of protection frames 3 are positioned and popped up, then the base plate 2 is laid at the upright position on the dome operation platform 1, and finally the erection is performed.
As shown in fig. 1, in the present embodiment, on the double row of protective frames 3, one wall connecting member 9 is provided every 1/4 circular arcs, and the wall connecting member 9 extends into the roof girder.
As shown in fig. 2 and 3, in the present embodiment, the arc of the arc portion corresponding to the working surface of the top layer is less than 45 °.
As shown in fig. 3, in the present embodiment, a waist bar 8 is provided at one side of the double row protection frame 3 close to the dome.
In this embodiment, the scaffold board 6 is firmly bound with the small cross bar 4 through iron wires.
In this embodiment, the space for roof building decoration and the operation space for workers are reserved between the overhanging end of the small cross rod 4 and the arc surface.
In the embodiment, the length of the overhanging end of the small cross bar 4 from the nearest supporting point is not more than 0.5 m.
In the present embodiment, annular work surfaces are sequentially installed on the double row protection frames 3 from bottom to top at intervals of 1.8 m.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A safety protection construction method for a large-span cast-in-place dome is characterized by comprising the following steps: an annular double-row protection frame is erected on the dome operation platform close to the arc slope, annular operation surfaces are sequentially erected on the double-row protection frame at certain intervals from bottom to top, and the erection of each layer of operation surface is synchronous with the construction of the dome main body; when an operation surface is erected, small cross rods are arranged on the double rows of protection frames, one ends of the small cross rods are outwards cantilevered to the arc surface of the dome and a certain space is reserved, the parts outwards cantilevered when the small cross rods are overhung for too long are supported by inclined struts, and the scaffold boards are laid on the parts outwards cantilevered by the small cross rods to form the operation surface; when the operation is carried out on the operation surface, the safety rope is hung on the upper layer of small cross rod, and for the operation surface on the top layer, the small cross rod is additionally arranged for hanging the safety rope and/or a baffle or a blocking net is arranged on one side of the double rows of protection frames close to the dome.
2. The safety protection construction method of the large-span cast-in-place dome according to claim 1, characterized in that: before construction, BIM modeling is carried out on the large-span cast-in-place dome, and a scheme for setting up double rows of protective frames and an operation surface is simulated and verified.
3. The safety protection construction method of the large-span cast-in-place dome according to claim 1, characterized in that: when the double-row protection frame is erected, the upright rod positions of the double-row protection frame are positioned and popped out, then the base plate is laid at the upright rod position on the dome operation platform, and finally the double-row protection frame is erected.
4. The safety protection construction method of the large-span cast-in-place dome according to claim 1, characterized in that: one side of the double-row protective frame close to the dome is provided with a waist blocking rod.
5. The safety protection construction method of the large-span cast-in-place dome according to claim 1, characterized in that: the scaffold board is firmly bound with the small cross rod through an iron wire.
6. The safety protection construction method of the large-span cast-in-place dome according to claim 1, characterized in that: the space for decorating the roof building and the operation space of workers are reserved between the overhanging end of the small cross rod and the arc surface.
7. The safety protection construction method of the large-span cast-in-place dome according to claim 1, characterized in that: on the double-row protective frame, wall connecting pieces are arranged every 1/4 circular arcs and extend into the roof girder.
8. The safety protection construction method of the large-span cast-in-place dome according to any one of claims 1 to 7, wherein: annular operation surfaces are sequentially erected on the double rows of protection frames at intervals of 1.8m from bottom to top.
9. The safety protection construction method of the large-span cast-in-place dome according to any one of claims 1 to 7, wherein: the radian of the arc part corresponding to the operation surface of the top layer is less than 45 degrees.
10. The safety protection construction method of the large-span cast-in-place dome according to any one of claims 1 to 7, wherein: the length of the overhanging end of the small cross rod from the nearest supporting point is not more than 0.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010618742.6A CN111749450A (en) | 2020-06-30 | 2020-06-30 | Safety protection construction method for large-span cast-in-situ dome |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010618742.6A CN111749450A (en) | 2020-06-30 | 2020-06-30 | Safety protection construction method for large-span cast-in-situ dome |
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| CN111749450A true CN111749450A (en) | 2020-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010618742.6A Pending CN111749450A (en) | 2020-06-30 | 2020-06-30 | Safety protection construction method for large-span cast-in-situ dome |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704016A (en) * | 2022-03-09 | 2022-07-05 | 中建八局新型建造工程有限公司 | Construction method of large-inclination-angle inclined roof profiled steel sheet of dome structure |
| CN115288193A (en) * | 2022-08-08 | 2022-11-04 | 中铁二局集团有限公司 | Space large-span dome structure construction method based on multilayer operation platform |
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| DE202005018427U1 (en) * | 2005-11-23 | 2006-04-20 | INGENIEURBÜRO BISMARK (IBB) Gesellschaft für Planung, Bauprojektierung, Heizungsanlagenprojektierung, Heizungsanlagenbau, Konstruktion, Fertigung und Vertrieb von Maschinenbau- und Anlagentechnik mbH | Scaffold-supported modular shuttering system for construction of concrete circular silo |
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| CN108678258A (en) * | 2018-06-20 | 2018-10-19 | 中国建筑局（集团）有限公司 | Large-span hemispherical reinforced concrete dome structure and construction method thereof |
| CN109680915A (en) * | 2018-12-25 | 2019-04-26 | 中国核工业二四建设有限公司 | A kind of hemispherical dome structure face scaffold and its erection method |
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2020
- 2020-06-30 CN CN202010618742.6A patent/CN111749450A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE202005018427U1 (en) * | 2005-11-23 | 2006-04-20 | INGENIEURBÜRO BISMARK (IBB) Gesellschaft für Planung, Bauprojektierung, Heizungsanlagenprojektierung, Heizungsanlagenbau, Konstruktion, Fertigung und Vertrieb von Maschinenbau- und Anlagentechnik mbH | Scaffold-supported modular shuttering system for construction of concrete circular silo |
| CN102535844A (en) * | 2012-02-10 | 2012-07-04 | 中国建筑第八工程局有限公司 | Construction method for spherical curved surface stainless steel curtain wall |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704016A (en) * | 2022-03-09 | 2022-07-05 | 中建八局新型建造工程有限公司 | Construction method of large-inclination-angle inclined roof profiled steel sheet of dome structure |
| CN114704016B (en) * | 2022-03-09 | 2024-05-10 | 中建八局新型建造工程有限公司 | Construction method of large-inclination-angle inclined roof profiled steel sheet with dome structure |
| CN115288193A (en) * | 2022-08-08 | 2022-11-04 | 中铁二局集团有限公司 | Space large-span dome structure construction method based on multilayer operation platform |
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Application publication date: 20201009 |