CN110685483A - Large-scale coal storage bin top plate prefabricating and assembling method - Google Patents
Large-scale coal storage bin top plate prefabricating and assembling method Download PDFInfo
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- CN110685483A CN110685483A CN201910839589.7A CN201910839589A CN110685483A CN 110685483 A CN110685483 A CN 110685483A CN 201910839589 A CN201910839589 A CN 201910839589A CN 110685483 A CN110685483 A CN 110685483A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
- E04H7/22—Containers for fluent solids, e.g. silos, bunkers; Supports therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B7/00—Roofs; Roof construction with regard to insulation
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
- E04H7/22—Containers for fluent solids, e.g. silos, bunkers; Supports therefor
- E04H7/24—Constructions, with or without perforated walls, depending on the use of specified materials
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Abstract
The invention discloses a large-scale coal storage bin top plate prefabricating and assembling method which comprises the following steps: s1, a cast-in-place main beam reinforced concrete bracket; s2, prefabricating a main beam and a steel secondary beam; s3, mounting a main beam; s4, mounting a steel secondary beam; s5, laying a profiled steel sheet and binding reinforcing steel bars; and S6, pouring concrete. The invention can shorten the construction period, reduce the cost and improve the safety. The invention is suitable for coal storage of 3 multiplied by 10 with the diameter of 36m4t is used in the prefabrication and assembly of the large coal storage bin top plate.
Description
Technical Field
The invention belongs to the technical field of constructional engineering, relates to a large coal storage bin, and particularly relates to a method for prefabricating and assembling a top plate of the large coal storage bin.
Background
With the improvement of national requirements for environmental protection, the coal storage mode of domestic thermal power plants and coal enterprises is continuously improved, and the traditional open-air stacking is not repeated but is replaced by a totally-enclosed structure mode. At present, the closed coal storage modes which are adopted in a large number include a net rack closed coal storage yard, a gas film closed coal storage yard, a concrete structure coal storage bin and the like. In order to increase the coal storage quantity, but the coal storage quantity is limited by factors such as fields and the like, a coal storage bin structure mode with a concrete structure is generally applied.
At present, the reinforced concrete beam plate structure with the installation diameter of 36m and the coal storage of 3 multiplied by 10 is adopted4When t large-scale coal storage bin roof, there are following defects:
firstly, the construction period is long; because the section of the main beam of the concrete structure is large, the span is large, a bearing all-round red scaffold must be built in the cylinder wall during construction, the building time of the scaffold is about 40 days (the simultaneous construction of a support frame and the cylinder wall is temporarily considered, the scaffold is completed when the cylinder wall is constructed to the top of the silo, the construction period is about 10 days), the construction period of the cast-in-place reinforced concrete structure on the top of the silo is about 20 days, and the two processes account for about 30 days of the key construction period; the time for dismantling the support frame is about 28 days when the strength of the concrete on the top of the silo reaches 100%, the time for dismantling the scaffold and cleaning the scaffold is 30 days after use, the time for pasting the coal bucket cast stone plate is about 20 days, and the working procedures account for about 78 days in a key construction period. That is, the erection of the scaffold from the silo support top to the slab pasting is completed for about 108 days. Therefore, the cast-in-place reinforced concrete beam plate structure in the prior art has the advantages of large construction quantity of assembling and disassembling and long construction period.
Secondly, the cost is high; because the structure size is great, the arrangement of reinforcement is more, so need spend a large amount of scaffold transports, lease expense and scaffold instrument's turnover expense, construction cost is high.
Thirdly, the safety is poor; the large-size load-bearing scaffold is assembled and disassembled in a severe environment, the operation safety risk is very high, and the safety of construction personnel during construction is reduced.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a large-scale coal storage bin top plate prefabricating and assembling method so as to achieve the purposes of shortening the construction period, reducing the cost and improving the safety.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the method comprises the following steps:
s1, a cast-in-place main beam reinforced concrete bracket;
s2, prefabricating a main beam and a steel secondary beam;
s3, mounting main beam
Hoisting the main beam to the main beam mounting position to be fixedly connected with the outer cylinder wall and the inner cylinder wall;
s4, mounting the steel secondary beam
Hoisting the steel secondary beam to the mounting position of the steel secondary beam and fixedly connecting the steel secondary beam with the main beam;
s5, laying a profiled steel sheet and binding reinforcing steel bars;
and S6, pouring concrete.
As a limitation of the present invention, the method comprises the following steps:
s1, cast-in-place main beam reinforced concrete corbel
Cast-in-place reinforced concrete corbels are arranged on the outer cylinder wall and the inner cylinder wall and are used as main beam supports;
s2, prefabricating a main beam and a steel secondary beam;
s3, mounting main beam
Hoisting a main beam to a main beam mounting position, wherein the main beam and the outer cylinder wall reinforced concrete bracket and the main beam and the inner cylinder wall reinforced concrete bracket are fixedly connected through embedded parts;
s4, mounting the steel secondary beam
Hoisting the steel secondary beam to the mounting position of the steel secondary beam, and fixedly connecting the steel secondary beam with the reinforced concrete corbel on the side surface of the main beam through the embedded part;
s5, laying profiled steel plates and binding reinforcing steel bars
Laying profiled steel plates on the main beam and the steel secondary beam, and binding reinforcing steel bars on the profiled steel plates;
s6, pouring concrete
And pouring concrete on the profiled steel sheet to form the top plate.
As another limitation of the invention, the installation position of the main beams is that each main beam is arranged on any radius of the outer cylinder wall, the included angle between the radii of the adjacent main beams is 20-30 degrees, and the installation position of the secondary steel beam is that each secondary steel beam is arranged between the two adjacent main beams.
As a further limitation of the present invention, the method comprises the steps of:
s1, cast-in-place main beam reinforced concrete corbel
The reinforced concrete corbels are cast in situ along the circumferential direction of the outer cylinder wall and the circumferential direction of the inner cylinder wall, and the connecting line of the reinforced concrete corbel on each inner cylinder wall and the reinforced concrete corbel on the outer cylinder wall which is arranged corresponding to the reinforced concrete corbel on the inner cylinder wall is positioned on the radius of the outer cylinder wall;
s2, prefabricating main beam and steel secondary beam
Prefabricating a reinforced concrete main beam and a steel secondary beam on the ground, and arranging main beam reinforced concrete corbels at intervals along the length direction of the main beam;
s3, mounting main beam
Hoisting the main beams to the main beam mounting positions, respectively placing two ends of each main beam on the inner cylinder wall reinforced concrete corbel and the outer cylinder wall reinforced concrete corbel corresponding to the inner cylinder wall reinforced concrete corbel, and fixedly connecting the main beams with the reinforced concrete corbels on the cylinder wall through the embedded parts;
s4, mounting the steel secondary beam
Hoisting the secondary steel beams to the mounting positions of the secondary steel beams, enabling each secondary steel beam to be arranged on the reinforced concrete corbels at the corresponding positions of the two adjacent main beams and fixedly connecting the secondary steel beams with the reinforced concrete corbels of the main beams through embedded parts;
s5, laying profiled steel plates and binding reinforcing steel bars
Laying profiled steel plates on the main beam and the steel secondary beam, and binding reinforcing steel bars on the profiled steel plates;
s6, pouring concrete
And pouring concrete on the profiled steel sheet to form the top plate.
As still further limiting aspect of the present invention, in step S1:
each outer cylinder wall reinforced concrete bracket and the hidden column arranged in the outer cylinder wall are cast in situ together, and each inner cylinder wall reinforced concrete bracket and the hidden column arranged in the inner cylinder wall are cast in situ together.
As another limitation of the present invention, in step S2: when the steel secondary beam is prefabricated, the steel secondary beam is coated with the anticorrosive fireproof coating.
As a further limitation of the invention, the included angle between the radii of adjacent main beams is 22.5 °.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
(1) the construction method can avoid the assembly and disassembly of the bearing scaffold in the prior art, the construction period from the hoisting of the precast beam to the completion of the concrete pouring at the top of the silo is about 35 days, the cross operation can be performed by taking measures for pasting the coal bucket cast stone plates, the occupied key construction period is 0, and the construction period can be saved by about 108-35=73 days by comparison.
(2) The invention reduces the structure size, the reinforcement and the construction cost; statistics shows that the total cost of the reinforced concrete beam-slab structure construction in the background technology is 583 ten thousand yuan, the total cost of the invention construction is 379 ten thousand yuan,
the total cost is reduced by 204 ten thousand yuan.
(3) The invention solves the problem that the large-volume bearing scaffold is assembled and disassembled in a severe environment in the cylinder wall, reduces the safety risk of constructors and fully embodies the people-oriented spirit. Meanwhile, the construction efficiency is effectively improved by fully utilizing machinery, the project cost is reduced, the construction period is shortened, the low-carbon, environment-friendly and green construction concept is embodied, and the method has high popularization value.
In conclusion, the method has the advantages of short construction period, low cost and low safety risk.
The invention is suitable for coal storage of 3 multiplied by 10 with the diameter of 36m4t is used in the prefabrication and assembly of the large coal storage bin top plate.
Drawings
The invention is described in further detail below with reference to the figures and the embodiments.
Fig. 1 is a schematic view of an installation structure of an embodiment of the present invention.
In the figure: 1. a main beam; 2. a steel secondary beam; 3. an inner cylinder wall; 4. an outer cylinder wall; 5. the outer cylinder wall is a reinforced concrete bracket; 6. inner cylinder wall reinforced concrete corbel; 7. the main beam reinforced concrete bracket.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the description of the preferred embodiment is only for purposes of illustration and understanding, and is not intended to limit the invention.
Embodiment of the invention discloses a large-scale coal storage bin top plate prefabricating and assembling method
The embodiment comprises the following steps:
s1, cast-in-place main beam reinforced concrete corbel 7
The main beam 1 support can be formed by adding cast-in-place reinforced concrete brackets at the bottom of the cylinder wall top ring beam main beam 1 (namely the top surfaces of the inner cylinder wall 3 and the outer cylinder wall 4), and the main beam 1 support can also be formed by embedding section steel for support at two ends of the prefabricated main beam 1. Preferentially adopting a supporting mode of a reinforced concrete bracket, and only accounting for the bearing capacity and the deformation requirements of the top ring beam and the bracket. If the scheme of pre-embedded profile steel is selected, the bearing capacity and deformation of the profile steel need to be checked.
In the embodiment, a reinforced concrete bracket supporting mode is adopted, and N6050-150B reinforced concrete brackets are cast in situ along the circumferential direction of the outer cylinder wall 4 and the circumferential direction of the inner cylinder wall 3. The connecting line of each inner cylinder wall reinforced concrete bracket 6 and the outer cylinder wall reinforced concrete bracket 5 which is arranged corresponding to the inner cylinder wall reinforced concrete bracket 6 is positioned on the radius of the outer cylinder wall 4, each outer cylinder wall reinforced concrete bracket 5 and the hidden column which is arranged in the outer cylinder wall 4 are cast in situ together, each inner cylinder wall reinforced concrete bracket 6 and the hidden column which is arranged in the inner cylinder wall 3 are cast in situ together, and the support of the reinforced concrete bracket to the cylinder wall is strengthened through the hidden column.
S2, prefabricating a main beam 1 and a steel secondary beam 2
Prefabricating a main beam 1 and a steel secondary beam 2 on the ground, wherein the height of the main beam 1 is 1280mm, and the superposed layer is 220 mm. N50-4070B main beam reinforced concrete corbels 7 are arranged along the length direction of the main beam 1 at intervals, and the distance between every two adjacent main beam reinforced concrete corbels 7 is 4.5-5.5 m. Key grooves and rough surfaces are reserved at two end ends of the main beam 1 and the steel secondary beam 2. The end surfaces of the main beams 1 are all provided with rough surfaces, and the depth of the concave-convex depth of the rough surfaces is not less than 6 mm.
The steel secondary beam 2 is coated with an anticorrosive fireproof coating, which is a fireproof coating commonly used for coating on a steel structure in the prior art, such as an epoxy zinc-rich primer 70 μm, an epoxy micaceous iron intermediate coating 70 μm and a polyurethane finish 100 μm.
S3, mounting the main beam 1
The main beams 1 are hoisted to the installation positions of the main beams 1, wherein the installation positions of the main beams 1 are that each main beam 1 is arranged on any radius of the outer cylinder wall 4, the included angle between the radiuses of the adjacent main beams 1 is 20-30 degrees, and in the embodiment, the included angle between the radiuses of the adjacent main beams 1 is 22.5 degrees.
Reference is made to the position of the main beam 1 in fig. 1. The main beam 1 is connected with the outer cylinder wall 4 and the main beam 1 is connected with the inner cylinder wall 3 through embedded parts. Specifically, the method comprises the following steps:
the main beam 1 is hoisted to the installation position of the main beam 1 through hoisting equipment, so that two ends of each main beam 1 are respectively placed on the inner cylinder wall reinforced concrete corbel 6 and the outer cylinder wall reinforced concrete corbel 5 corresponding to the inner cylinder wall reinforced concrete corbel 6, and are connected with the outer cylinder wall reinforced concrete corbel 5 and the inner cylinder wall reinforced concrete corbel 6 in a welding mode through the embedded parts.
S4, mounting the steel secondary beam 2
The steel secondary beam 2 is hoisted to the installation position of the steel secondary beam 2, the installation position of the steel secondary beam 2 means that each steel secondary beam 2 is arranged between two adjacent main beams 1, the position of the steel secondary beam 2 in figure 1 can be referred, and the steel secondary beam 2 is connected with the main beams 1 through welding by embedded parts. Specifically, the method comprises the following steps:
and hoisting the secondary steel beams 2 to the mounting positions of the secondary steel beams 2, so that each secondary steel beam 2 is arranged on the reinforced concrete corbels 7 of the main beams at the corresponding positions of the two adjacent main beams 1 and is connected with the reinforced concrete corbels 7 of the main beams on the side surfaces of the main beams in a welding way through embedded parts.
S5, laying profiled steel plates and binding reinforcing steel bars
And (3) paving profiled steel plates on the main beam 1 and the steel secondary beam 2, and binding reinforcing steel bars on the profiled steel plates.
S6, pouring concrete
And pouring concrete on the profiled steel sheet to form the top plate.
Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A large-scale coal storage bin top plate prefabricating and assembling method is characterized by comprising the following steps: the method comprises the following steps:
s1, a cast-in-place main beam reinforced concrete bracket;
s2, prefabricating a main beam and a steel secondary beam;
s3, mounting main beam
Hoisting the main beam to the main beam mounting position to be fixedly connected with the outer cylinder wall and the inner cylinder wall;
s4, mounting the steel secondary beam
Hoisting the steel secondary beam to the mounting position of the steel secondary beam and fixedly connecting the steel secondary beam with the main beam;
s5, laying a profiled steel sheet and binding reinforcing steel bars;
and S6, pouring concrete.
2. The large-scale coal storage bunker top plate prefabricating and assembling method of claim 1, characterized in that: the method comprises the following steps:
s1, cast-in-place main beam reinforced concrete corbel
Cast-in-place reinforced concrete corbels are arranged on the outer cylinder wall and the inner cylinder wall and are used as main beam supports;
s2, prefabricating a main beam and a steel secondary beam;
s3, mounting main beam
Hoisting a main beam to a main beam mounting position, wherein the main beam and the outer cylinder wall reinforced concrete bracket and the main beam and the inner cylinder wall reinforced concrete bracket are fixedly connected through embedded parts;
s4, mounting the steel secondary beam
Hoisting the steel secondary beam to the mounting position of the steel secondary beam, and fixedly connecting the steel secondary beam with the reinforced concrete corbel on the side surface of the main beam through the embedded part;
s5, laying profiled steel plates and binding reinforcing steel bars
Laying profiled steel plates on the main beam and the steel secondary beam, and binding reinforcing steel bars on the profiled steel plates;
s6, pouring concrete
And pouring concrete on the profiled steel sheet to form the top plate.
3. The large-scale coal storage bunker roof prefabrication and assembly method of claim 1 or 2, characterized in that: the installation positions of the main beams are that each main beam is arranged on any radius of the wall of the outer cylinder, the included angle between the radii of the adjacent main beams is 20-30 degrees, and the installation positions of the secondary steel beams are that each secondary steel beam is arranged between the two adjacent main beams.
4. The large-scale coal storage bunker roof prefabrication and assembly method of claim 3, characterized in that: the method comprises the following steps:
s1, cast-in-place main beam reinforced concrete corbel
The reinforced concrete corbels are cast in situ along the circumferential direction of the outer cylinder wall and the circumferential direction of the inner cylinder wall, and the connecting line of the reinforced concrete corbel on each inner cylinder wall and the reinforced concrete corbel on the outer cylinder wall which is arranged corresponding to the reinforced concrete corbel on the inner cylinder wall is positioned on the radius of the outer cylinder wall;
s2, prefabricating main beam and steel secondary beam
Prefabricating a reinforced concrete main beam and a steel secondary beam on the ground, and arranging main beam reinforced concrete corbels at intervals along the length direction of the main beam;
s3, mounting main beam
Hoisting the main beams to the main beam mounting positions, respectively placing two ends of each main beam on the inner cylinder wall reinforced concrete corbel and the outer cylinder wall reinforced concrete corbel corresponding to the inner cylinder wall reinforced concrete corbel, and fixedly connecting the main beams with the reinforced concrete corbels on the cylinder wall through the embedded parts;
s4, mounting the steel secondary beam
Hoisting the secondary steel beams to the mounting positions of the secondary steel beams, enabling each secondary steel beam to be arranged on the reinforced concrete corbels at the corresponding positions of the two adjacent main beams and fixedly connecting the secondary steel beams with the reinforced concrete corbels of the main beams through embedded parts;
s5, laying profiled steel plates and binding reinforcing steel bars
Laying profiled steel plates on the main beam and the steel secondary beam, and binding reinforcing steel bars on the profiled steel plates;
s6, pouring concrete
And pouring concrete on the profiled steel sheet to form the top plate.
5. The large-scale coal storage bunker top plate prefabricating and assembling method of claim 4, characterized in that: in step S1:
each outer cylinder wall reinforced concrete bracket and the hidden column arranged in the outer cylinder wall are cast in situ together, and each inner cylinder wall reinforced concrete bracket and the hidden column arranged in the inner cylinder wall are cast in situ together.
6. The large-scale coal storage bin roof prefabrication and assembly method of any one of claims 1-2 and 4-5, wherein: in step S2: when the steel secondary beam is prefabricated, the steel secondary beam is coated with the anticorrosive fireproof coating.
7. The large-scale coal storage bunker roof prefabrication and assembly method of claim 3, characterized in that: the included angle between the radiuses of the adjacent main beams is 22.5 degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910839589.7A CN110685483A (en) | 2019-09-06 | 2019-09-06 | Large-scale coal storage bin top plate prefabricating and assembling method |
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| CN201910839589.7A CN110685483A (en) | 2019-09-06 | 2019-09-06 | Large-scale coal storage bin top plate prefabricating and assembling method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112360216A (en) * | 2020-12-02 | 2021-02-12 | 中国二十冶集团有限公司 | Concrete storage bin top plate construction method |
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Application publication date: 20200114 |