CN112196185A - Construction method of stiff fair-faced concrete column - Google Patents
Construction method of stiff fair-faced concrete column Download PDFInfo
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- CN112196185A CN112196185A CN202011037251.9A CN202011037251A CN112196185A CN 112196185 A CN112196185 A CN 112196185A CN 202011037251 A CN202011037251 A CN 202011037251A CN 112196185 A CN112196185 A CN 112196185A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/36—Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials
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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
- E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
- E04G13/021—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor for circular columns
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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
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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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- 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
In order to solve the technical problems that the construction flow of the stiff fair-faced concrete column is large in limitation, the verticality is difficult to control in the construction process, a template is easy to damage, and the appearance of the concrete surface is poor, the construction method of the stiff fair-faced concrete column is provided, and comprises the following steps: and installing a steel structure for constructing a stiff fair-faced concrete cylinder, and then constructing a lower floor slab, wherein a plurality of bottom joint bars are arranged on the lower floor slab and positioned on the circumferential direction of the bottom of the steel structure at intervals. The construction method and the construction requirements can effectively control the construction quality of the fair-faced concrete in a controlled manner, and effectively avoid the problems that the appearance quality of the concrete surface is influenced by the damage of the template in the construction process and the like.
Description
Technical Field
The invention belongs to the technical field of construction of stiff fair-faced concrete cylinders, and particularly relates to a construction method of a stiff fair-faced concrete cylinder.
Background
With the rapid development of the building industry in China, the concepts of green and low carbon and the like are more and more concerned by people. The fair-faced concrete has the advantages of environmental protection, natural texture, no need of plastering and decoration, construction period and cost saving and the like; after the pouring of the fair-faced concrete is finished, other decoration constructions are not needed, and the characteristic of one-time forming of the fair-faced concrete puts high requirements on the aspects of construction flow, construction process, concrete raw materials and the like.
At present, most of the construction of the fair-faced concrete cylinder adopts a construction process that templates are firstly spliced into a mold and then integrally hoisted, but the method is not suitable for the construction of the stiff fair-faced concrete cylinder, especially the working condition of the steel structure construction in advance, and the cylindrical templates cannot be integrally hoisted due to the fact that the top of the cylinder is provided with the overhanging steel corbels.
Secondly, as the perpendicularity, cicada seams, surface color difference and the like cannot be adjusted by adopting repair measures after the fair-faced concrete is formed, higher requirements are provided for the perpendicularity control of the template, the integrity of the surface, the size deviation, the splicing of the abutted seams and the like during construction.
Therefore, the key problem to be solved at present is how to solve the template system, the construction process and the method of the stiff fair-faced concrete cylinder and ensure that the surface impression quality requirement of the fair-faced concrete is met. At present, no complete construction method for the stiff fair-faced concrete cylinder exists, and the conventional construction method for the fair-faced concrete cylinder is difficult to meet the construction requirement of the stiff fair-faced concrete cylinder.
Disclosure of Invention
The construction method of the stiff fair-faced concrete column is provided for solving the technical problems that the construction flow of the stiff fair-faced concrete column is large in limitation, the verticality is difficult to control in the construction process, a template is easy to damage, and the appearance of the concrete surface is poor.
The technical scheme of the construction method of the stiff fair-faced concrete column comprises the following steps:
a construction method of a stiff bare concrete cylinder comprises the following steps:
the first step is as follows: installing a steel structure for building a stiff fair-faced concrete cylinder, and then building a lower floor slab, wherein a plurality of bottom joint bars are arranged on the lower floor slab and positioned in the circumferential direction of the bottom of the steel structure at intervals;
the second step is that: drawing a cylindrical side line on the outer side of the circumference of the lower floor slab, where the bottom joint bar is located, according to the design requirements of a drawing;
the third step: a positioning disc template for pouring a positioning disc is arranged on the cylindrical side line;
the fourth step: erecting an operation scaffold on the lower floor slab and at the periphery of the steel structure;
the fifth step: binding cylindrical steel bars at the upper end of the positioning disc and around the steel structure;
and a sixth step: after the binding of the rechecked cylindrical steel bars meets the design requirements, a cylindrical template is arranged on the lower floor slab and positioned at the outer side of the cylindrical steel bars;
the seventh step: retesting the position and the verticality of the cylindrical template by retests, and pouring the stiff fair-faced concrete cylinder after confirming that the requirements are met;
eighth step: after the requirement of removing the formwork is met, removing the cylindrical formwork;
the ninth step: curing the poured stiff fair-faced concrete cylinder by a curing worker;
the tenth step: and after the maintenance period is finished, protecting the rigid fair-faced concrete cylinder.
The construction method of the stiff fair-faced concrete cylinder can solve the problem that the integral hoisting of the cylindrical template cannot be adopted due to the fact that the steel corbels extend outwards from the top of the cylinder, and can solve the problem that the one-step casting forming cannot be carried out.
Further, after the first steel structure is installed, the installation position, the perpendicularity and the accuracy of the steel structure need to be rechecked by recheckers, and the installation accuracy of the steel structure is guaranteed to meet the design requirements of drawings.
Furthermore, the height of the positioning disc in the third step is controlled according to the height requirement of a later building surface layer, the height of the positioning disc is 5-10cm, and the positioning disc is poured after the outer side of the positioning disc is reinforced by a cylindrical mould matching cylindrical hoop.
Further, the cylinder template of step six adopts 2 semi-cylinders to splice and forms, needs constructor to detect its material and surface quality before assembling, detects whether accord with the design requirement.
Furthermore, in the sixth step, the number of the cylindrical templates is 2-3, the cylindrical templates are sequentially installed from bottom to top, and the length of each cylindrical template is not more than 3 meters; and in the eighth step, after the form removal requirement is met, retaining the uppermost cylindrical template, removing the rest cylindrical templates, mounting the cylindrical template on the uppermost cylindrical template, and returning to the seventh step until the integral pouring of the stiff fair-faced concrete cylinder is completed. Under the condition that the high height of the stiff fair-faced concrete cylinder is high, sectional pouring is needed. The height of the cylindrical template in the primary pouring range is 2-3. And after the first pouring is finished, the uppermost cylindrical template is reserved during the template removal, is used as a positioning disc during the second section of cylindrical pouring, is divided into multiple sections, and the step of pouring is repeated. In order to reduce the color difference of the cylindrical surface and the generation of cold seams, the multi-stage pouring time is controlled within 48 hours.
Furthermore, in the sixth step, the upper and lower adjacent cylindrical templates are connected through a matched cylindrical hoop, the upper and lower sides of the matched cylindrical hoop are respectively provided with a limiting screw hole, and the matched cylindrical hoop is provided with an observation hole.
Further, when the position and the verticality of the re-measured cylindrical template in the seventh step do not meet the requirements, the position and the verticality should be adjusted in time, the operation handle arranged outside the cylindrical template and the chain block arranged on the steel structure are used for adjusting, and the structure is convenient to operate and can avoid the cylindrical template from being rubbed with the inner steel structure.
Further, in the tenth step, firstly, a layer of thin film is covered on the surface of the stiff fair-faced concrete cylinder; then, a layer of sheet iron is covered on the outer side below the stiff fair-faced concrete cylinder.
Further, the second step further comprises rechecking the number, the position and the protective layer thickness of the bottom dowel bars by rechecking personnel, checking whether the requirements are met, and timely modifying if the requirements are not met.
Further, the fifth step further includes checking whether the binding of the cylindrical steel bars meets the design requirements.
Drawings
FIG. 1 is a schematic structural view of a stiff fair-faced concrete column according to the present invention after completion of a first step;
FIG. 2 is a schematic structural view of a second step of the method for constructing a rigid fair-faced concrete column of the present invention;
FIG. 3 is a schematic structural view of a stiff fair-faced concrete column according to the method of the present invention after the third step is completed;
FIG. 4 is a schematic structural diagram of a stiff fair-faced concrete column construction method according to the present invention after a third step of opening a positioning disc template is completed;
FIG. 5 is a schematic structural view of the reinforced fair-faced concrete column construction method of the present invention after the fourth step;
FIG. 6 is a schematic structural view of the reinforced fair-faced concrete column construction method of the present invention after the fifth step is completed;
FIG. 7 is a schematic structural view of a rigid fair-faced concrete column construction method of the present invention after completion of the sixth step;
FIG. 8 is a schematic structural view of the stiffened fair-faced concrete column construction method of the present invention after the eighth step is completed;
FIG. 9 is a schematic structural view of a stiff fair-faced concrete column according to the tenth embodiment of the present invention;
FIG. 10 is a schematic plan view of a reinforced column in a method of constructing a rigid bare concrete column according to the present invention;
FIG. 11 is a detailed view of a mating cylindrical hoop of the construction method of a stiff fair-faced concrete cylinder of the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Example 1
Referring to fig. 1 to 11, a technical solution of a method for constructing a stiff bare concrete cylinder according to this embodiment is as follows:
a construction method of a stiff bare concrete cylinder comprises the following steps:
the first step is as follows: installing a steel structure 2 for building a stiff fair-faced concrete cylinder, then building a lower floor slab 1, pouring a plurality of bottom joint bars 3 on the lower floor slab 1 and in the circumferential direction of the bottom of the steel structure 2 at intervals, and arranging steel corbels 201 extending outwards at the top of the steel structure 2 after installation;
after the steel structure 2 is installed, rechecking personnel are required to recheck the installation position, the verticality and the precision of the steel structure 2, so that the installation precision of the steel structure 2 is ensured to meet the design requirements of drawings;
the second step is that: drawing a cylindrical side line 4 on the outer side of the circumference of the lower floor slab 1 where the bottom dowel bar 3 is located according to the design requirements of a drawing; rechecking the number and position of the bottom dowel bars 3 and the thickness of the protective layer by rechecking personnel, checking whether the requirements are met or not, and timely rectifying and modifying if the requirements are not met;
the third step: a positioning disc template 5 for pouring a positioning disc 6 is arranged on the cylindrical sideline 4, the height of the positioning disc 6 is controlled according to the height requirement of a later building surface layer, the height of the positioning disc 6 is 5-10cm, and the positioning disc 6 is poured after the outer side is reinforced by a cylindrical mould matched cylindrical hoop;
the fourth step: erecting an operation scaffold 7 on the lower floor slab 1 and at the periphery of the steel structure 2;
the fifth step: binding cylindrical steel bars 8 at the upper end of the positioning disc 6 and around the steel structure 2, and rechecking whether the binding of the cylindrical steel bars 8 meets the design requirements;
and a sixth step: after the rechecked cylindrical steel bars 8 are bound to meet the design requirements, a cylindrical template 9 is arranged on the lower floor slab 1 and positioned on the outer side of the cylindrical steel bars 8;
the cylindrical template 9 is formed by splicing 2 semicircular cylinders, and before splicing, constructors are required to detect the material and the surface quality of the cylindrical template, so that whether the cylindrical template meets the design requirements is detected;
the length of each single cylindrical template 9 is not more than 3 meters, and if the height of a cylinder required to be built is more than 6 meters, sectional pouring is required. The primary pouring range is 2-3 cylindrical templates 9, the height of the primary pouring range exceeds that of partial sectional pouring, the primary pouring is firstly carried out, after the primary pouring is finished, the uppermost cylindrical template 9 is reserved when the primary pouring is carried out, the uppermost cylindrical template is used as a positioning disc when the second section of cylindrical template is poured, the primary pouring is divided into multiple sections, and the step of pouring is repeated. In order to reduce the color difference of the cylindrical surface and the generation of cold seams, the multi-section pouring time is optimally controlled within 48 hours.
The upper and lower adjacent cylindrical templates 9 are connected through the matched cylindrical hoops 905, and the structure is adopted to effectively improve the stability between the upper and lower adjacent cylindrical templates 9.
The cylindrical template 9 is installed and reinforced, namely after the two semicircular templates are spliced, a first reinforcing step is carried out in the horizontal direction of the outer side by adopting a matched cylindrical hoop 905, and the vertical distance between the matched cylindrical hoops 905 is generally 20-30 cm; the outer side of the matched cylindrical hoop 905 is reinforced by a vertical batten 903, the outer side of the vertical batten 903 is reinforced by a horizontal steel pipe 904, and the horizontal steel pipe 904 is connected by a steel pipe matched fastener;
the matched cylindrical hoop 905 is a metal strap with the width of about 3-5cm, and is provided with a limit screw hole 9051 and an observation hole 9052; when the matched cylindrical hoop 905 is used for connecting the vertically adjacent cylindrical templates 9, the limiting screw penetrates through the limiting screw hole 9051 to be used for fixing the matched cylindrical hoop 905 and the cylindrical templates 9, and the observation hole 9052 is used for observing whether the cylindrical templates 9 are vertically aligned in installation and whether grout leaks from cylindrical joints during concrete pouring;
the seventh step: retesting the position and verticality of the cylindrical template 9 by retests, and pouring the stiff fair-faced concrete cylinder after confirming that the requirements are met;
when the position and the verticality of the remeasured cylindrical template 9 do not meet the requirements, the position and the verticality should be adjusted in time, and the adjustment is carried out by using an operating handle 901 arranged on the outer side of the cylindrical template 9 and a chain block 902 arranged on the steel structure 2, so that the operation is convenient and the cylindrical template 9 and the internal steel structure 2 can be prevented from being rubbed;
the number of the operating handles 901 is 4, the operating handles are respectively arranged at 4 corner positions of the cylindrical template 9 and used for operations such as moving and hoisting of the cylindrical template 9, and the chain block 902 is arranged below the steel corbel 201 with the top extending outwards;
the vibrating rod with the corresponding diameter is selected according to the stiffness structure and the density of the reinforcing steel bars in the pouring process, the purpose is to ensure that the vibrating rod can be smoothly lifted while meeting the vibrating requirement in the pouring process, and if the diameter of the vibrating rod is too large, the vibrating rod can be clamped and cannot be smoothly lifted in the pouring process, so that the concrete is vibrated too much, and the surface quality is influenced.
Before pouring, the vibrating rod is inserted into the cylinder, the vibrating rod is lifted according to the pouring height of concrete in the pouring process, and the vibration time of each stay is controlled to be about 30 seconds. Conventional concrete placement vibrting spear can reciprocate at will, if inner structure is too intensive, reciprocates and probably leads to the vibrting spear card unable removal between the reinforcing bar, consequently need transfer the vibrting spear to the bottom earlier during clear water concrete placement, and the in-process only lifts, does not do and transfers.
Eighth step: the cylindrical formwork 9 is dismantled after the formwork dismantling requirement is met, and when the formwork is dismantled, an operating handle 901 and a chain block 902 on the outer side are adopted, and tools such as a crowbar cannot be used for violently dismantling, so that the concrete surface or the cylindrical formwork 9 is prevented from being damaged, and the turnover use of the cylindrical formwork 9 is prevented from being influenced;
the ninth step: curing the poured stiff fair-faced concrete cylinder by a curing worker;
the tenth step: after the maintenance period is finished, the stiff fair-faced concrete cylinder is protected, the product protection comprises two parts, the first part is that the surface of the stiff fair-faced concrete cylinder is completely covered with a layer of film 1001, then the outer side below the stiff fair-faced concrete cylinder is covered with a layer of sheet iron 1002 for protection, and the covering height of the sheet iron 1002 is generally 1.5-2 meters.
The construction method of the stiff fair-faced concrete cylinder can solve the problem that the integral hoisting of the cylindrical template cannot be adopted due to the fact that the steel corbels extend outwards from the top of the cylinder, and can solve the problem that the one-step casting forming cannot be carried out.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (10)
1. A construction method of a stiff bare concrete cylinder is characterized by comprising the following steps:
the first step is as follows: installing a steel structure (2) for building a stiff fair-faced concrete cylinder, building a lower floor slab (1), and arranging a plurality of bottom joint bars (3) on the lower floor slab (1) and in the circumferential direction of the bottom of the steel structure (2) at intervals;
the second step is that: drawing a cylindrical side line (4) on the outer side of the circumference of the lower floor slab (1) where the bottom dowel bar (3) is located according to the design requirements of a drawing;
the third step: a positioning disc template (5) for pouring a positioning disc (6) is arranged on the cylindrical sideline (4);
the fourth step: erecting operation scaffolds (7) on the lower floor slab (1) and at the periphery of the steel structure (2);
the fifth step: binding cylindrical steel bars (8) at the upper end of the positioning disc (6) and around the steel structure (2);
and a sixth step: after the rechecked cylindrical steel bars (8) are bound to meet the design requirements, a cylindrical template (9) is arranged on the lower floor slab (1) and positioned on the outer side of the cylindrical steel bars (8);
the seventh step: retesting the position and verticality of the cylindrical template (9) by retests, and pouring the stiff fair-faced concrete cylinder after confirming that the requirements are met;
eighth step: after the form removal requirement is met, the cylindrical form (9) is removed;
the ninth step: curing the poured stiff fair-faced concrete cylinder by a curing worker;
the tenth step: and after the maintenance period is finished, protecting the rigid fair-faced concrete cylinder.
2. The construction method of the stiff fair-faced concrete column as claimed in claim 1, wherein after the steel structure (2) in the first step is installed, rechecking personnel are required to recheck the installation position, verticality and accuracy of the steel structure (2) to ensure that the installation accuracy of the steel structure (2) meets the design requirements of drawings.
3. The construction method of the stiff fair-faced concrete column as claimed in claim 1, wherein the height of the positioning disc (6) in the third step is controlled according to the height requirement of the later building surface layer, the height of the positioning disc (6) is 5-10cm, and after the outer side is reinforced by a cylindrical mold and a cylindrical hoop, the positioning disc (6) is poured.
4. The construction method of the stiff fair-faced concrete cylinder as claimed in claim 1, wherein the cylinder formwork (9) of the sixth step is formed by splicing 2 semicircular cylinders, and before splicing, constructors are required to detect the material and the surface quality of the cylinder formwork, and whether the cylinder formwork meets the design requirements is detected.
5. The construction method of the stiff fair-faced concrete cylinder as claimed in claim 1, wherein in the sixth step, the number of the cylindrical formworks (9) is 2-3, the cylindrical formworks (9) are sequentially installed from bottom to top, and the length of the cylindrical formworks (9) is not more than 3 meters;
and in the eighth step, after the form removal requirement is met, retaining the uppermost cylindrical template (9), removing the rest cylindrical templates (9), installing the cylindrical template (9) on the uppermost cylindrical template (9), and returning to the seventh step until the integral pouring of the stiff fair-faced concrete cylinder is completed.
6. The construction method of the stiff fair-faced concrete cylinder as claimed in claim 5, wherein in the sixth step, the upper and lower adjacent cylinder formworks (9) are connected through a matching cylinder hoop (905), the upper and lower sides of the matching cylinder hoop (905) are respectively provided with a limit screw hole (9051), and the matching cylinder hoop (905) is provided with an observation hole (9052).
7. The construction method of the stiff fair-faced concrete column as claimed in claim 1, wherein the position and the verticality of the remeasured cylindrical formwork (9) in the seventh step should be adjusted in time when the position and the verticality do not meet the requirements, and the adjustment is performed by using an operating handle (901) arranged on the outer side of the cylindrical formwork (9) and a chain block (902) arranged on the steel structure (2).
8. The construction method of stiff fair-faced concrete cylinder according to claim 1, wherein in the tenth step, first, a thin film (1001) is coated on the surface of the stiff fair-faced concrete cylinder; then, a layer of sheet iron (1002) covers the outer side of the lower part of the stiff fair-faced concrete cylinder.
9. The construction method of the stiff fair-faced concrete cylinder as claimed in claim 1, wherein the second step further comprises rechecking the number, position and protective layer thickness of the bottom joint bars (3) by rechecking personnel, and checking whether the rechecking meets the requirements or not, and if not, timely rectifying and improving.
10. The construction method of the stiff fair-faced concrete cylinder as claimed in claim 1, wherein the fifth step further comprises checking whether the binding of the cylindrical steel bars (8) meets the design requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011037251.9A CN112196185A (en) | 2020-09-28 | 2020-09-28 | Construction method of stiff fair-faced concrete column |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011037251.9A CN112196185A (en) | 2020-09-28 | 2020-09-28 | Construction method of stiff fair-faced concrete column |
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| CN112196185A true CN112196185A (en) | 2021-01-08 |
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| CN202011037251.9A Pending CN112196185A (en) | 2020-09-28 | 2020-09-28 | Construction method of stiff fair-faced concrete column |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942682A (en) * | 2021-01-27 | 2021-06-11 | 上海绿地建设(集团)有限公司 | Multicavity steel core concrete column |
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| EP2208837A1 (en) * | 2009-01-16 | 2010-07-21 | Ecoware S.p.A. | Column for supporting equipment at a predetermined distance from the ground surface, particularly solar panels, dish antennas and the like |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112942682A (en) * | 2021-01-27 | 2021-06-11 | 上海绿地建设(集团)有限公司 | Multicavity steel core concrete column |
| CN112942682B (en) * | 2021-01-27 | 2022-06-14 | 上海绿地建设(集团)有限公司 | Multicavity steel core concrete column |
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