CN113216561A - Small-section reinforced concrete air duct construction technology - Google Patents
Small-section reinforced concrete air duct construction technology Download PDFInfo
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- CN113216561A CN113216561A CN202110482753.0A CN202110482753A CN113216561A CN 113216561 A CN113216561 A CN 113216561A CN 202110482753 A CN202110482753 A CN 202110482753A CN 113216561 A CN113216561 A CN 113216561A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F17/00—Vertical ducts; Channels, e.g. for drainage
- E04F17/04—Air-ducts or air channels
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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
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
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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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
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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
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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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
- E04G21/12—Mounting of reinforcing inserts; Prestressing
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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
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/122—Machines for joining reinforcing bars
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
According to the small-section reinforced concrete air duct provided by the invention, the air inlet curtain is formed by the low pressure of the continuous area at one side, the air outlet curtain is formed by the high pressure of the continuous area at one side, and the air pressure difference occurs in the horizontal direction, so that a closed air curtain is formed, and the air curtain is used for isolating odor diffusion and absorbing sludge odor into a special waste gas pipeline; the small-section reinforced concrete air duct is constructed by adopting a special-shaped template manufacturing and mounting technology, a mould box method construction technology and a side template supporting technology; the problems that the air duct is complex and irregular in shape, the small formwork in the air duct inner space is difficult to mount and dismount, the single-side support of the air duct outer wall is difficult to reinforce, the protruding part of the special-shaped concrete structure is easy to deform and the like are solved, the small-section concrete air duct construction technology is standardized and improved, the construction quality is improved, and the construction period is shortened.
Description
Technical Field
The invention belongs to the technical field of air ducts and construction, and particularly relates to a small-section reinforced concrete air duct and a construction technology thereof.
Background
With the rapid development of industry and the increasing living standard of people, industrial sewage and domestic sewage are in a sharp rising trend, and a final product, namely sludge, obtained after sewage is treated becomes a difficult problem which needs to be solved urgently in environmental protection of local governments; because the sludge contains nearly 40 percent of organic matters, the sludge has the characteristics of toxicity, harm, high water content, large volume and combustible low calorific value; compared with sludge landfill and compost treatment, the sludge drying and blending combustion method can recover energy in sludge for heat supply or power generation, and really achieves the treatment targets of reduction, harmlessness and recycling.
In the storage and transfer processes of sludge treatment, sludge emits odor to diffuse outwards to pollute factory buildings and indoor air, the storage design for sludge treatment is matched with small-section reinforced concrete air ducts, the small-section reinforced concrete air ducts of the existing sludge storage are not engineering practice examples, the construction of the small-section reinforced concrete air ducts refers to the air duct construction technology designed by a civil building ventilation system, and the industrial building concrete air duct construction technology is used for reference, so that the requirements cannot be met, and the odor blocking effect is poor.
Disclosure of Invention
The invention discloses a small-section reinforced concrete air duct and a construction technology thereof, wherein the small-section reinforced concrete air duct is characterized in that special reinforced concrete air ducts are designed on two sides of a bin body, a fan is utilized, an air inlet curtain is formed in a continuous area on one side at low pressure, an air outlet curtain is formed in a continuous area on one side at high pressure, and air pressure difference occurs in the horizontal direction, so that a closed air curtain is formed, odor diffusion is isolated by the air curtain, and sludge odor is absorbed into a special waste gas pipeline.
In order to achieve the purpose, the invention provides the following technical scheme:
a small-section reinforced concrete air duct comprises a bin body, an air outlet duct, an air inlet duct and a fan, wherein the air outlet duct and the air inlet duct are oppositely arranged on two sides of the bin body; the air inlet duct comprises an air inlet main duct, a plurality of air inlet branch ducts and a plurality of air inlets, the air inlet main duct and the air inlet branch ducts are vertically arranged in parallel, a plurality of ventilation holes are formed in a wall body between the air inlet main duct and the air inlet branch ducts, the air inlet branch ducts are connected with the air inlets, and the air inlets and the air outlets are arranged oppositely.
Furthermore, the vertical section of the air outlet branch air duct along the length direction of the air outlet duct is in an inverted trapezoid shape, and the vertical section of the air outlet along the length direction of the air outlet duct is in a rectangular shape.
Furthermore, the main air outlet duct perpendicular to the main air outlet duct at the through hole is vertically connected with the branch air outlet duct, the branch air outlet duct is vertically connected with the air outlet, and the branch air inlet duct is vertically connected with the air inlet.
Further, the fan includes air-blower and exhaust fan, the air-blower is connected the exhaust duct, the exhaust fan is connected the air inlet duct.
A construction technology of a small-section reinforced concrete air duct comprises the following steps:
(1) pre-burying reservation is carried out according to the elevation of a drawing, and the bin body is poured;
(2) manufacturing a template and a box die according to a design drawing, numbering, and arranging through holes on the box die;
(3) installing a template and a box mold: erecting formwork supports on two sides of the bin body respectively, installing the box mould of the air inlet main air duct or the air outlet main air duct prepared in the step (2) in place according to the elevation of a drawing, binding steel bars outside the box mould, and installing cushion blocks; before the cantilever template is erected, positioning ribs are welded according to control lines, burrs are formed at the stubble connecting position of the bin body, sundries in a wall body are removed by an air compressor, a template at the bottom of a cantilever beam, an air outlet branch air channel template, an air inlet branch air channel template or an air inlet branch air channel box template and a ventilation hole template are paved according to the elevation of a drawing, the stay wires are straightened, beam reinforcing steel bars are bound, cushion blocks are installed, templates at two sides are installed, and the templates are adjusted;
before the template and the box mold are assembled, firstly, a control line of a main axis of a building is guided and measured according to an air duct axis measuring hole, each axis is guided by taking the control line as a starting point, and according to an inner line, a side line and an outer side control line of an axis and an ink line used for a construction drawing, the three lines must be in place before construction so as to be convenient for installation and correction of the template; during assembly, the abutted seams between adjacent plate surfaces are controlled, the seams between the two plates are sealed by double faced adhesive tapes to prevent slurry leakage, and after the assembly is finished, the template and the vertical steel pipe are firmly bound by steel wires to keep the integrity of the template;
(4) erecting a single-side template; the method comprises the following steps of erecting a single-side formwork support, wherein the single-side formwork support comprises a fastening part, a supporting part and an anchoring part, the fastening part comprises secondary ridges and main ridges, the supporting part comprises inclined struts, and the anchoring part comprises ground anchor bolts and nuts;
(5) concrete pouring and tamping: pouring concrete, controlling the rising speed to be 2-2.5 m/h, controlling the pouring thickness to be within 50cm each time, vibrating by using a small-sized plug-in vibrator with the diameter of 75mm or smaller after each pouring, controlling the vibrating distance to be 300-400 mm, pouring concrete at intervals within 2h, and leveling after the concrete is tamped;
(6) when the concrete reaches the specified form removal strength, firstly removing the inclined strut, and then removing the secondary edge, the main edge and the template;
(7) the construction of the floating plates above the air inlet and the air outlet: installing a template at the bottom of the floating plate, binding reinforcing steel bars, installing cushion blocks, installing and fixing templates at two sides of an air inlet or an air outlet on a formwork support according to a drawing, then installing and fixing a single-side template, fixing the templates by using U-shaped fasteners, splicing the seams between the templates by using double-sided adhesive tapes, tamping concrete, leveling, and removing the templates after the concrete reaches the specified form removal strength.
Further, the template in the step (2) comprises a special-shaped template, the special-shaped template is a regular trapezoid and a semi-regular trapezoid, and the two semi-regular trapezoids can be spliced into a regular trapezoid; the box mold is a cuboid formed by splicing rectangular templates.
Further, the surface of the template or the box mold in the step (2) which is contacted with the concrete is coated with a water-based release agent.
Further, in the step (2), the inner part of the box die is supported and fixed by split bolts, the bolt distance is 500mm, and the distance between the split bolts at the through hole part of the box die is 200 mm.
Further, in the step (6), the secondary ridges are made of 40 multiplied by 90mm wood purlin and are transversely arranged at intervals of 500mm, the main ridges are double steel pipes at intervals of 500mm and are vertically arranged.
Further, a working platform is built while the template and the box mold are installed in the step (3).
The template is checked and accepted before pouring, and the precision requirement of the template checking and accepting is as follows:
the abutted seam between the two templates is less than or equal to 1 mm;
the height difference between the adjacent templates is less than or equal to 1 mm;
the flatness of the template is less than or equal to 2 mm;
the deviation of the plane size of the template is +/-3 mm.
Compared with the prior art, the invention has the following advantages and beneficial effects:
according to the small-section reinforced concrete air duct provided by the invention, the air inlet curtain is formed by the low pressure of the continuous area at one side, the air outlet curtain is formed by the high pressure of the continuous area at one side, and the air pressure difference occurs in the horizontal direction, so that the closed air curtain is formed, and the air curtain is used for isolating odor diffusion and absorbing sludge odor into a special waste gas pipeline.
The small-section reinforced concrete air duct construction technology provided by the invention adopts a special-shaped template and mould box method to manufacture construction technology, adopts template unilateral support reinforcement technology, and successfully solves the problems that personnel cannot enter the small-section special-shaped concrete structure template during installation and disassembly, the template is difficult to support, the reinforcement is difficult, the small-section structure is easy to deform, the construction quality is difficult to ensure, more building wastes are generated and the like by erecting a working platform; the construction speed is accelerated, the construction period is saved, the construction cost is reduced, and the green, environment-friendly and energy-saving construction process is realized. Meanwhile, the effect of the fair-faced concrete is achieved after the air duct is demoulded, the interior of the box mould is smooth, the construction quality is guaranteed, reference is provided for concrete structure construction similar to narrow space, and certain popularization and application values are achieved.
Drawings
FIG. 1 is a schematic structural view of a small-section reinforced concrete duct according to the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of a single side form support of the present invention;
description of reference numerals:
1. a bin body; 2. a main air outlet duct; 3. an air outlet branch air duct; 4. carrying out cantilever; 5. an air outlet; 6. an air inlet main air duct; 7. an air inlet branch duct; 8. an air inlet; 9. a ventilation hole; 10. a single-sided template; 11. secondary corrugation; 12. main corrugation; 13. bracing; 14. a horizontal cross bar; 15. and (5) oblique steel pipes.
Detailed Description
The technical solutions provided by the present invention will be described in detail with reference to specific embodiments, and it should also be understood that the specific process parameters and the like in the following examples are only one example of suitable ranges, that is, those skilled in the art can select the specific ranges through the description herein, and are not limited to the specific values illustrated in the following examples, which are only used for illustrating the present invention and are not used for limiting the scope of the present invention.
Example 1
As shown in fig. 1 to 2, a small-section reinforced concrete air duct comprises a bin body, an air outlet duct, an air inlet duct and a fan, wherein the air outlet duct and the air inlet duct are oppositely arranged at two sides of the bin body, the air outlet duct comprises a main air outlet duct, a plurality of branch air outlet ducts and a plurality of air outlets, the main air outlet duct is 0.4m wide and 1.2m high, the branch air outlet duct is 0.08m wide, the air outlets are 6.0m wide and 0.1m high, a plurality of through holes are arranged at the upper end of the main air outlet duct, the through holes are connected with the branch air outlet ducts, and the branch air outlet ducts are connected with the air outlets; the air inlet duct comprises an air inlet main duct, a plurality of air inlet branch ducts and a plurality of air inlets, the width of the air inlet main duct is 1.75m, the height of the air inlet main duct is 2.4m, the width of the air inlet branch duct is 0.3m, the height of the air inlet branch duct is 1.5m, the width of the air inlet is 6.0m, the height of the air inlet is 0.5m, the air inlet main duct and the air inlet branch duct are vertically arranged in parallel, a plurality of ventilation holes are formed in a wall body between the air inlet main duct and the air inlet branch duct, the air inlet branch duct is.
The vertical cross section of the air outlet branch air channel along the length direction of the air outlet channel is inverted trapezoid, the template used by the air outlet branch air channel comprises a special-shaped template, the special-shaped template is regular trapezoid and semi-regular trapezoid, the two semi-regular trapezoids can be assembled into the regular trapezoid, the size of each side of the semi-regular trapezoid is 2.075m, 0.92m, 1.915m and 0.2m, and the vertical cross section of the air outlet along the length direction of the air outlet channel is rectangular.
The main air outlet duct is vertically connected with the branch air outlet duct at the through hole, the branch air outlet duct is vertically connected with the air outlet, and the branch air inlet duct is vertically connected with the air inlet.
The fan comprises an air blower and an exhaust fan, the air blower is connected with the air outlet duct, and the exhaust fan is connected with the air inlet duct.
Example 2
As shown in fig. 1 to 3, the construction according to the structure of the small-section reinforced concrete air duct of example 1, the construction technique of the small-section reinforced concrete air duct, includes the steps of:
(1) pre-burying reservation is carried out according to the elevation of a drawing, and the bin body is poured;
(2) manufacturing a template and a box die according to a design drawing, numbering the template and the box die, and arranging through holes on the box die according to the design drawing; the clean water wooden template is adopted, so that the cost is lower, the weight is light, the breadth is large, the warping, deformation and cracking are avoided, the water resistance is good, the surface of a poured object is smooth and attractive, the secondary plastering process of an air duct wall can be avoided, the wind resistance is reduced, the clean water wooden template is easy to process, templates in various shapes can be processed in construction, the installation and the disassembly are convenient, and the manufacture of a box mold is also convenient; in view of the practical situation of air duct design, the air outlet branch air duct design disperses and stably diffuses the air flow in the air outlet main air duct to the bin body by means of a trapezoidal channel, the concrete structure is a trapezoidal structure, the shape is irregular, and a special-shaped template manufacturing scheme is adopted;
(3) installing a template and a box mold: erecting formwork supports on two sides of the bin body respectively, installing box molds of the air inlet main air duct or the air outlet main air duct in place according to the elevation of a drawing, binding steel bars outside the box molds, and installing cushion blocks; before the cantilever template is erected, positioning ribs are welded according to control lines, burrs are formed at the stubble connecting position of the bin body, sundries in a wall body are removed by an air compressor, a template at the bottom of a cantilever beam, an air outlet branch air channel template, an air inlet branch air channel template or an air inlet branch air channel box template and a ventilation hole template are paved according to the elevation of a drawing, the stay wires are straightened, beam reinforcing steel bars are bound, cushion blocks are installed, templates at two sides are installed, and the templates are adjusted;
before the template and the box mold are assembled, firstly, a control line of a main axis of a building is guided and measured according to an air duct axis measuring hole, each axis is guided by taking the control line as a starting point, and according to an inner line, a side line and an outer side control line of an axis and an ink line used for a construction drawing, the three lines must be in place before construction so as to be convenient for installation and correction of the template; during assembly, the abutted seams between adjacent plate surfaces are controlled, the seams between the two plates are sealed by double faced adhesive tapes to prevent slurry leakage, and after the assembly is finished, the template and the vertical steel pipe are firmly bound by steel wires to keep the integrity of the template;
(4) erecting a single-side template; the method comprises the following steps of erecting a single-side formwork support, wherein the single-side formwork support comprises a fastening part, a supporting part and an anchoring part, the fastening part comprises secondary ridges and main ridges, the supporting part comprises inclined struts, horizontal cross rods and inclined steel pipes are further arranged on the inclined struts, and the anchoring part comprises ground anchor bolts and nuts;
and (3) checking and accepting the template:
the abutted seam between the two templates is less than or equal to 1 mm;
the height difference between the adjacent templates is less than or equal to 1 mm;
the flatness of the template is less than or equal to 2 mm;
the size deviation of the plane of the template is +/-3 mm;
(5) concrete pouring and tamping: pouring concrete, controlling the rising speed to be 2-2.5 m/h, controlling the pouring thickness to be within 50cm each time, vibrating by using a small-sized plug-in vibrator with the diameter of 75mm or smaller after each pouring, controlling the vibrating distance to be 300-400 mm, pouring concrete at intervals within 2h, and leveling after the concrete is tamped;
(6) when the concrete reaches the specified form removal strength, firstly removing the inclined strut, and then removing the secondary edge, the main edge and the template;
(7) the construction of the floating plates above the air inlet and the air outlet: installing a horizontal template at the bottom of the floating plate on a formwork support according to a drawing, binding steel bars, installing cushion blocks, installing and fixing templates at two sides of an air inlet or an air outlet, installing and fixing a single-side template, supporting, splicing the joints between the templates by using a double-sided adhesive tape, carrying out concrete pouring, then leveling, and removing the templates after the concrete reaches the specified form removal strength; the horizontal template of air outlet or air intake adopts the individual layer wood masterplate, supports and adopts the quick detach system, supports the pole setting and adopts main factory building inner tower, makes level and adopts 50 80 special wooden stupefied, lays at the air outlet according to interval 300mm, and a rack is on the scaffold frame, and one section is laid on the air outlet, and the wooden stupefied above according to air outlet design full laying establishes the wood cement template, and the mould seam is fixed with U type fastener, guarantees the fastener quantity, ensures safety, and template seam crossing can carry out the piece joint with the double sticky tape.
Further, the template in the step (2) comprises a special-shaped template, the special-shaped template is a regular trapezoid and a semi-regular trapezoid, and the two semi-regular trapezoids can be spliced into a regular trapezoid; the box mould is a cuboid formed by splicing rectangular templates.
And (3) coating a water-based release agent on the surface of the template or box mold in the step (2) contacted with the concrete.
And (3) in the step (2), the inner part of the box mould is supported and fixed by split bolts, the distance between the bolts is 500mm, and the distance between the split bolts at the through hole part of the box mould is 200 mm.
In the step (6), the secondary ridges are made of 40 multiplied by 90mm wood purlin and are arranged horizontally at an interval of 500mm, and the main ridges are double steel pipes and are arranged vertically at an interval of 500 mm.
And (3) setting up a working platform while installing the template and the box mold.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention. .
Claims (10)
1. A small-section reinforced concrete air duct is characterized by comprising a bin body, an air outlet duct, an air inlet duct and a fan, wherein the air outlet duct and the air inlet duct are oppositely arranged on two sides of the bin body; the air inlet duct comprises an air inlet main duct, a plurality of air inlet branch ducts and a plurality of air inlets, the air inlet main duct and the air inlet branch ducts are vertically arranged in parallel, a plurality of ventilation holes are formed in a wall body between the air inlet main duct and the air inlet branch ducts, the air inlet branch ducts are connected with the air inlets, and the air inlets and the air outlets are arranged oppositely.
2. The small-section reinforced concrete air duct according to claim 1, wherein the vertical section of the air outlet branch duct along the length direction of the air duct is an inverted trapezoid, and the vertical section of the air outlet along the length direction of the air duct is a rectangle.
3. The small-section reinforced concrete air duct according to claim 1, wherein the main vertical air outlet duct at the through hole is vertically connected with the branch air outlet duct, the branch air outlet duct is vertically connected with the air outlet, and the branch air inlet duct is vertically connected with the air inlet.
4. A small-section reinforced concrete air duct according to claim 1, characterized in that said fan comprises a blower and an exhaust fan, said blower being connected to the air duct and said exhaust fan being connected to the air duct.
5. A technique for constructing a small-section reinforced concrete air duct as claimed in any one of claims 1 to 4, comprising the steps of:
(1) pre-burying reservation is carried out according to the elevation of a drawing, and the bin body is poured;
(2) manufacturing a template and a box mold according to a design drawing, numbering the template and the box mold, and forming a through hole in the box mold;
(3) installing a template and a box mold: erecting formwork supports on two sides of the bin body respectively, installing the box mould of the air inlet main air duct or the air outlet main air duct prepared in the step (2) in place according to the elevation of a drawing, binding steel bars outside the box mould, and installing cushion blocks; paving a template at the bottom of the cantilever beam, an air outlet branch air channel template, an air inlet branch air channel template or an air inlet branch air channel box template and a ventilation hole template according to the elevation of a drawing, straightening by using a stay wire, binding beam steel bars, installing cushion blocks, installing templates at two sides and adjusting the templates;
(4) erecting a single-side template; the method comprises the following steps of erecting a single-side formwork support, wherein the single-side formwork support comprises a fastening part, a supporting part and an anchoring part, the fastening part comprises secondary ridges and main ridges, the supporting part comprises inclined struts, and the anchoring part comprises ground anchor bolts and nuts;
(5) concrete pouring and tamping: pouring concrete, controlling the rising speed to be 2-2.5 m/h, controlling the pouring thickness to be within 50cm each time, vibrating by using a small-sized plug-in vibrator with the diameter of 75mm or smaller after each pouring, controlling the vibrating distance to be 300-400 mm, pouring concrete at intervals within 2h, and leveling after the concrete is tamped;
(6) when the concrete reaches the specified form removal strength, firstly removing the inclined strut, and then removing the secondary edge, the main edge and the template;
(7) the construction of the floating plates above the air inlet and the air outlet: installing a template at the bottom of the floating plate, binding reinforcing steel bars, installing cushion blocks, installing and fixing templates at two sides of an air inlet or an air outlet on a formwork support according to a drawing, then installing and fixing a single-side template, fixing the templates by using U-shaped fasteners, splicing the seams between the templates by using double-sided adhesive tapes, tamping concrete, leveling, and removing the templates after the concrete reaches the specified form removal strength.
6. The technology for constructing a small-section reinforced concrete air flue as claimed in claim 5, wherein the formwork in the step (2) comprises a special-shaped formwork, the special-shaped formwork is a regular trapezoid and a semi-regular trapezoid, and the two semi-regular trapezoids can be spliced into a regular trapezoid; the box mold is a cuboid formed by splicing rectangular templates.
7. A technique as claimed in claim 5, wherein the concrete is coated with a water-based release agent on the surface of the form or box mould in contact with the concrete in step (2).
8. A technology for constructing a small-section reinforced concrete air flue as claimed in claim 6 or 7, wherein the interior of said box mould is supported and fixed by tie bolts with a distance of 500mm, and the distance between tie bolts at the through hole part of said box mould is 200 mm.
9. The technology for constructing the small-section reinforced concrete air duct according to the claim 5, wherein in the step (6), the secondary ridges are made of 40 x 90mm wood purlin and are transversely arranged at the interval of 500mm, the main ridges are double steel pipes and are vertically arranged at the interval of 500 mm.
10. A small-section reinforced concrete air flue construction technique according to claim 5, wherein the step (3) of installing the formwork and the box formwork is carried out while simultaneously building a working platform.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1837550A (en) * | 2006-04-19 | 2006-09-27 | 北京建工一建工程建设有限公司 | Profiled template for building and supporting system thereof |
| CN105240041A (en) * | 2015-11-17 | 2016-01-13 | 中国长江三峡集团公司 | Ventilating smoke dissipating system used for underground cavern construction of large hydropower station |
| CN210801544U (en) * | 2019-09-11 | 2020-06-19 | 上海胜狮集成设备有限公司 | Flow guide structure, air cooling pipeline and container |
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2021
- 2021-04-30 CN CN202110482753.0A patent/CN113216561B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1837550A (en) * | 2006-04-19 | 2006-09-27 | 北京建工一建工程建设有限公司 | Profiled template for building and supporting system thereof |
| CN105240041A (en) * | 2015-11-17 | 2016-01-13 | 中国长江三峡集团公司 | Ventilating smoke dissipating system used for underground cavern construction of large hydropower station |
| CN210801544U (en) * | 2019-09-11 | 2020-06-19 | 上海胜狮集成设备有限公司 | Flow guide structure, air cooling pipeline and container |
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| NHXUYD34FS: "旭辉单侧支模", 《HTTPS://WWW.DOC88.COM/P-1876974910062.HTML》 * |
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