CN112681750A - Concrete pouring construction method for large steel mould independent high and large column with column cap - Google Patents
Concrete pouring construction method for large steel mould independent high and large column with column cap Download PDFInfo
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- CN112681750A CN112681750A CN202011550391.6A CN202011550391A CN112681750A CN 112681750 A CN112681750 A CN 112681750A CN 202011550391 A CN202011550391 A CN 202011550391A CN 112681750 A CN112681750 A CN 112681750A
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Abstract
A concrete pouring construction method for a large steel mould independent high and large column with a column cap comprises the following steps: 1) binding column steel bars and assembling the dies; when binding the column reinforcing steel bars, reserving vibration spaces at four corners respectively; 2) grouting the bottom of the column: before pouring, pouring 200-300mm thick viscous grouting material with the same strength as the poured concrete into the bottom of the column; 3) pouring concrete: carrying out concrete pouring operation from bottom to top, and continuously vibrating through a reserved vibrating space while pouring; 4) leveling the top surface of the column; 5) and (5) removing the mold and maintaining. The construction method of the invention can ensure the construction quality of the column and the service life of the column.
Description
Technical Field
The invention relates to the field of building construction, and particularly belongs to a large steel mould independent high column concrete pouring construction technology with a column cap.
Background
The large-scale multi-storey industrial factory building structure type gradually adopts an assembly type integral frame structure system, frame columns of the system are generally more than 10 meters in height, the section size reaches 1000x1000mm, and the system is independently constructed before beam slab construction. The column template generally adopts an integral large steel template and is integrated with a column top end column cap template, so that template splicing can be avoided, and the column body is ensured to achieve the effect of fair-faced concrete. In the existing construction of the large steel mould independent high column, due to the fact that the column height is too large, internal reinforcing steel bars are too dense, and the standard basis is lacked in concrete raw material control, the concrete slump is not suitable, and quality defects such as slurry leakage, root rot, honeycombs, pitted surfaces, exposed ribs, cracks, holes and the like occur after the column is demoulded due to factors such as improper vibration in the operation process, the sensory effect of the column is influenced, and meanwhile the service life of the column cannot be guaranteed.
In order to effectively solve a series of quality problems caused by the concrete construction of the high and large independent steel mould column, the blank of the concrete pouring process research of the high and large independent steel mould column is filled, and the construction level is improved. The invention particularly relates to a large steel mould independent high and large column concrete pouring construction technology with a column cap, which is used for guaranteeing that the concrete pouring quality of a high and large independent steel mould column is excellent at one time.
Disclosure of Invention
The invention aims to provide a concrete pouring construction method for an independent high and large column, which is used for continuously vibrating in the pouring process, avoiding the generation of quality defects such as slurry leakage, root rot, honeycombs, pitted surfaces, cracks and the like, improving the quality and appearance quality of the column and ensuring the service life of the column.
In order to achieve the purpose, the technical scheme provided by the invention is a concrete pouring construction method for a large steel mould independent tall column with a column cap, which comprises the following steps:
1) binding and die assembling the column steel bars, binding the column steel bars, and assembling the die by adopting a steel template; when binding the column reinforcing steel bars, reserving vibration spaces at four corners respectively;
2) grouting the bottom of the column: before pouring, pouring 200-300mm thick viscous grouting material with the same strength as the poured concrete into the bottom of the column;
3) pouring concrete: carrying out concrete pouring operation from bottom to top, and continuously vibrating through a reserved vibrating space while pouring;
4) leveling the top surface of the column: after concrete pouring is finished, timely scraping surface floating slurry, and leveling the top surface of the column cap by adopting mortar;
5) removing the mold and maintaining: and (5) removing the formwork after the concrete pouring is finished for 12h, and maintaining the column to keep the wet state for not less than 7 days.
After the help of the column steel bars and the die assembly are completed in the step 1), a pouring and vibrating operation platform is built at the top of the column.
In the step 3), each column is divided into 5-6 sections for pouring, the pouring interval time of each section is 3-5min, and the pouring height is controlled to be 1.5m each time; in the whole pouring process, the free falling height of the concrete must not exceed 1.5 m.
Step 3), casting concrete raw material requirements are as follows: the raw material sand adopts medium sand, the fineness modulus is 2.94, and the sand passing through a sieve pore of 0.315mm is not less than 15 percent; the stones adopt broken stones with the maximum grain diameter equal to or less than 31.5mm, and are continuously graded, and the content of needle-shaped flaky grains is not more than 10%; the cement is ordinary portland cement; in the process of mixing the concrete, the water cement ratio of the concrete is controlled within 0.50; controlling the concrete slump to be 160mm and controlling the positive and negative errors to be 20 mm.
And in the concrete mixing process, a pumping agent and a water reducing agent are added.
In the step 1), the template is an integral large steel mold.
In the step 1), a vibration space is reserved to be a square space with the length and the width of 150mm when the column reinforcement cage is bound.
The wind-holding ropes are arranged around the steel mould column to carry out steel mould drawknot, the steel mould is vertically fixed, the verticality is monitored in the concrete pouring process, and the column verticality is corrected through the wind-holding rope drawknot at any time.
According to the construction method for pouring the concrete of the large steel mould independent tall column with the column cap, disclosed by the invention, the construction processes of grouting the bottom of the column before pouring, continuously vibrating in the pouring process and controlling the collapse degree of the concrete are adopted, so that the quality defects of slurry leakage, root rot, honeycombs, pitted surfaces, exposed ribs, cracks, holes and the like of the independent tall column after the concrete is poured are overcome, and the construction quality and the service life of the independent tall column are ensured.
Detailed Description
The invention provides a concrete pouring construction technology for a large steel mould independent high and large column with a column cap. The specific implementation steps are as follows:
1) binding and die assembly of column steel bars: and (3) binding steel bars of the independent high and large columns, wherein the independent high and large columns generally refer to the frame columns which are independently bound with the steel bars and cast with the section size of 1000mmX1000mm or more, and the height of the columns reaches 10 meters. When the independent high and large column steel bars are bound, holes of 150mmX150mm are reserved at four corners respectively. And closing the die by adopting a column template after the column reinforcement is bound. The column template adopts an integral large steel mould, so that the template joint and the independent formwork support of the column cap area can be avoided, and the effect of the fair-faced concrete is achieved. An operation platform is arranged on the upper portion of a column cap at the top end of the steel mould column, and a circle of shaped protection is arranged around the operation platform, so that the construction safety of operating personnel is guaranteed. And arranging wind holding ropes around the steel mould column to perform steel mould knot drawing, and vertically fixing the steel mould.
2) Grouting the bottom of the column: before pouring, a pump truck is used for pouring 200-300mm thick viscous grouting material with the same strength as the poured concrete into the bottom of the column. So as to prevent the bottom of the steel mould column from leaking slurry and rotting roots.
3) Pouring concrete: and (3) after the grouting material is finished, starting concrete pouring operation, and performing concrete pouring from bottom to top by using a natural pump, wherein each column is divided into 5-6 sections during pouring, the pouring interval time of each section is 3-5min, and the pouring height of each section is controlled to be 1.5 m. In the whole pouring process, the free falling height of the concrete must not exceed 1.5 m.
Four people stand on operation platform among the pouring process, adopt four 75 types at four angles, the 2.5KW vibrating rod stretches into the bottom from the hole is reserved in the four corners and continuously vibrates. And the vibration is continuously vibrated according to the principles of 'fast inserting and slow pulling, sequential upward moving, omission prevention' and no contact with the steel bars and the embedded parts until the pouring is finished.
Pouring concrete raw materials: the raw material sand adopts medium sand, the fineness modulus is 2.94, and the sand passing through a sieve pore of 0.315mm is not less than 15%. The stones adopt crushed stones with the maximum grain diameter equal to or less than 31.5mm, and are continuously graded, and the content of needle-shaped flaky grains is not more than 10%. The cement is ordinary portland cement. In the process of mixing the concrete, the water cement ratio of the concrete is controlled within 0.50. Grinding aid is not doped in the mixing process, and a proper amount of pumping aid and water reducing agent are added. Controlling the concrete slump to be 160mm and controlling the positive and negative errors to be 20 mm.
When concrete is poured, the station of the pump truck and other preparation work are determined in advance, and an operator sends the concrete to an operation platform at the top of the column from the crank arm type ascending vehicle to perform concrete pouring and vibrating operation.
And (5) quality supervision is well carried out in the concrete pouring process, and water is strictly forbidden. Controlling the concrete slump to be 160mm and controlling the positive and negative errors to be 20 mm. And (5) monitoring the verticality in the concrete pouring process, and correcting the verticality of the column through pulling the wind rope.
4) Leveling the top surface of the column: and after the concrete pouring is finished, scraping the surface floating slurry in time, and leveling the top surface of the column cap by adopting mortar.
5) Removing the mold and maintaining: and (3) after concrete pouring is finished for 12h, removing the formwork, curing the column by spraying water, and covering two layers of plastic films on the whole vertical surface of the column for moisture preservation and maintenance. And (3) reinforcing the curing of the column in the first three days after the template is removed, so that the column is kept in a wet state, and the continuous curing time of the column concrete is not less than 7 days.
Claims (8)
1. A concrete pouring construction method for a large steel mould independent high and large column with a column cap comprises the following steps:
1) binding and die assembling the column steel bars, binding the column steel bars, and assembling the die by adopting a steel template; when binding the column reinforcing steel bars, reserving vibration spaces at four corners respectively;
2) grouting the bottom of the column: before pouring, pouring 200-300mm thick viscous grouting material with the same strength as the poured concrete into the bottom of the column;
3) pouring concrete: carrying out concrete pouring operation from bottom to top, and continuously vibrating through a reserved vibrating space while pouring;
4) leveling the top surface of the column: after concrete pouring is finished, timely scraping surface floating slurry, and leveling the top surface of the column cap by adopting mortar;
5) removing the mold and maintaining: and (5) removing the formwork after the concrete pouring is finished for 12h, and maintaining the column to keep the wet state for not less than 7 days.
2. The concrete pouring construction method for the large steel form independent high and large column with the column cap as claimed in claim 1, wherein after the column reinforcement assistance and the mold closing are completed in the step 1), a pouring and vibrating operation platform is established at the top of the column.
3. The concrete pouring construction method for the large steel form independent high and large column with the column cap according to claim 1, characterized in that in the step 3), each column is divided into 5-6 sections for pouring, the pouring interval time of each section is 3-5min, and the pouring height of each section is controlled to be 1.5 m; in the whole pouring process, the free falling height of the concrete must not exceed 1.5 m.
4. The concrete pouring construction method for the large steel mould independent high and large column with the column cap according to the claim 1 is characterized in that the step 3) is that the concrete pouring raw materials require: the raw material sand adopts medium sand, the fineness modulus is 2.94, and the sand passing through a sieve pore of 0.315mm is not less than 15 percent; the stones adopt broken stones with the maximum grain diameter equal to or less than 31.5mm, and are continuously graded, and the content of needle-shaped flaky grains is not more than 10%; the cement is ordinary portland cement; in the process of mixing the concrete, the water cement ratio of the concrete is controlled within 0.50; controlling the concrete slump to be 160mm and controlling the positive and negative errors to be 20 mm.
5. The concrete pouring construction method for the large steel form independent tall and large column with the column cap as claimed in claim 4, characterized in that a pumping agent and a water reducing agent are added during the concrete mixing process.
6. The concrete pouring construction method for the large steel form independent high and large column with the column cap according to claim 1, characterized in that in the step 1), the formwork adopts an integral large steel form.
7. The concrete pouring construction method for the large steel form independent high and large column with the column cap according to claim 1, characterized in that in the step 1), the reserved vibrating space is a square space with the length and the width of 150mm when the column reinforcement cage is bound.
8. The large steel form independent tall column concrete pouring construction method with the column cap according to claim 1, characterized in that wind holding ropes are arranged around the steel form to perform steel form knot drawing, the steel form is vertically fixed, perpendicularity monitoring is performed during concrete pouring, and column perpendicularity correction is performed through wind holding rope knot drawing at any time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011550391.6A CN112681750A (en) | 2020-12-24 | 2020-12-24 | Concrete pouring construction method for large steel mould independent high and large column with column cap |
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| CN202011550391.6A CN112681750A (en) | 2020-12-24 | 2020-12-24 | Concrete pouring construction method for large steel mould independent high and large column with column cap |
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| CN112681750A true CN112681750A (en) | 2021-04-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338537A (en) * | 2021-05-26 | 2021-09-03 | 中国五冶集团有限公司 | Construction method of ultrahigh large-section concrete frame column |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2101594A1 (en) * | 1992-09-18 | 1994-03-19 | Mark W. West | Method of forming a concrete deck by the use of a flexible formwork |
| JP4505094B2 (en) * | 1999-09-02 | 2010-07-14 | 有限会社モーレ | Filling formwork for equipment piping |
| CN106639306A (en) * | 2017-01-22 | 2017-05-10 | 徐仁贵 | Material-saving type inclination linking and supporting plate column cap wood formwork and construction method thereof |
| CN107503512A (en) * | 2017-09-11 | 2017-12-22 | 中建八局第三建设有限公司 | A kind of special-shaped clear water concrete post hybrid template reinforcement system and its lossless form removal method |
| CN207620367U (en) * | 2017-11-24 | 2018-07-17 | 杨众 | The big punching block of class rectangle column |
| CN211873825U (en) * | 2019-12-27 | 2020-11-06 | 宁波优造建筑科技有限公司 | Splicing type cast-in-place column large steel die |
-
2020
- 2020-12-24 CN CN202011550391.6A patent/CN112681750A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2101594A1 (en) * | 1992-09-18 | 1994-03-19 | Mark W. West | Method of forming a concrete deck by the use of a flexible formwork |
| JP4505094B2 (en) * | 1999-09-02 | 2010-07-14 | 有限会社モーレ | Filling formwork for equipment piping |
| CN106639306A (en) * | 2017-01-22 | 2017-05-10 | 徐仁贵 | Material-saving type inclination linking and supporting plate column cap wood formwork and construction method thereof |
| CN107503512A (en) * | 2017-09-11 | 2017-12-22 | 中建八局第三建设有限公司 | A kind of special-shaped clear water concrete post hybrid template reinforcement system and its lossless form removal method |
| CN207620367U (en) * | 2017-11-24 | 2018-07-17 | 杨众 | The big punching block of class rectangle column |
| CN211873825U (en) * | 2019-12-27 | 2020-11-06 | 宁波优造建筑科技有限公司 | Splicing type cast-in-place column large steel die |
Non-Patent Citations (1)
| Title |
|---|
| 欧阳钦等主编: "《混凝土结构工程施工》", 29 February 2016, 重庆大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338537A (en) * | 2021-05-26 | 2021-09-03 | 中国五冶集团有限公司 | Construction method of ultrahigh large-section concrete frame column |
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Application publication date: 20210420 |