CN115288504A - Construction method of concrete floor on top of large-scale bin body structure - Google Patents
Construction method of concrete floor on top of large-scale bin body structure Download PDFInfo
- Publication number
- CN115288504A CN115288504A CN202211147363.9A CN202211147363A CN115288504A CN 115288504 A CN115288504 A CN 115288504A CN 202211147363 A CN202211147363 A CN 202211147363A CN 115288504 A CN115288504 A CN 115288504A
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- Prior art keywords
- steel sheet
- profiled steel
- floor slab
- bin
- ring beam
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Classifications
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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
- E04H7/26—Constructions, with or without perforated walls, depending on the use of specified materials mainly of concrete, e.g. reinforced concrete or other stone-like 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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/365—Stop-end 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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/48—Supporting structures for shutterings or frames for floors or roofs
- E04G11/50—Girders, beams, or the like as supporting members for forms
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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
- E04G13/06—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall
- E04G13/066—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall for overhangs
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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
- E04G17/005—Strips for covering joints between form sections, e.g. to avoid burring or spilling of laitance
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention relates to the technical field of floor slab construction, in particular to a construction method of a concrete floor slab at the top of a large-scale bin body structure, which comprises the following steps: constructing a bin top steel beam and a bin top ring beam, wherein the concrete finished surface of the bin top ring beam and the floor slab bottom formwork have the same elevation; the method comprises the following steps of (1) adopting a profiled steel sheet as a bottom template of a bin top floor slab, arranging the profiled steel sheet in a length direction perpendicular to a secondary beam of a bin top steel beam when the profiled steel sheet is installed, fixing the profiled steel sheet and the profiled steel sheet in a spot welding manner at the lap joint, connecting and fixing the profiled steel sheet and the bin top steel beam by adopting a welding nail, connecting the profiled steel sheet and a bin top ring beam, and extending the profiled steel sheet into the bin top ring beam and supporting the profiled steel sheet on the top surface of ring beam concrete; installing a side mold and pouring a floor slab; the method uses the support-free construction method of the profiled steel sheet, avoids building and later dismantling of a scaffold or a steel truss, saves a large amount of manpower and material resources, effectively accelerates construction progress, reduces construction cost, is simple to operate and easy to operate in the actual use process, and has good popularization prospect.
Description
Technical Field
The invention relates to the technical field of floor slab construction, in particular to a construction method of a concrete floor slab at the top of a large-scale bin body structure.
Background
Along with social progress and production requirements, silo structures in the construction field are enlarged more and more, the silo structures are large in diameter and high in height, a silo top floor slab is designed into a reinforced concrete structure completely, a supporting system of a bottom floor slab is always a technical difficulty in the industry, and the following three methods are generally adopted in the construction of the traditional silo top floor slab at present:
1. full hall scaffold support system: building a full-hall scaffold from bottom to top in the silo as a support frame of a bottom die of a silo top floor slab, and dismantling the silo top floor slab after construction is completed; the method has high construction cost and long period; 2. central vertical derrick + steel truss structural system: embedding an embedded part at the top of a central column in a silo, installing a vertical derrick on the embedded part, taking the central vertical derrick as a support column, constructing a steel truss structure at the top end of the vertical derrick as a silo top construction platform, and dismantling a silo top floor after the construction is finished; the method needs to consume a large amount of manpower and material resources, and has higher construction cost; 3. assembled steel truss support system: the steel truss is prefabricated on the ground and installed on the top of the bin, the steel truss supporting structure is integrally used as a construction platform to carry out the construction of the floor slab on the top of the bin, the floor slab on the top of the bin is disassembled after the construction of the floor slab on the top of the bin is finished, and then the floor slab is taken out from a reserved hole on the top of the bin by a large crane; the method also needs to lease a large crane, and the steel truss is difficult to take out of the silo after being disassembled, so that time and labor are wasted during hoisting and dismantling, the construction cost is high, and the period is long.
Disclosure of Invention
The invention aims to solve the problems, and provides a construction method of a concrete floor slab on the top of a large-scale bin body structure, which can effectively shorten the construction period and reduce the construction cost.
The invention solves the problems and adopts the technical scheme that:
a construction method of a concrete floor slab at the top of a large-scale bin body structure comprises the following steps:
s1: constructing a bin top steel beam and a bin top ring beam, and controlling the concrete finish surface of the bin top ring beam to be at the same elevation as a bottom template of a bin top floor slab;
s2: installing a bottom template of the bin top floor slab, and adopting a profiled steel sheet as the bottom template of the bin top floor slab; when the profiled steel sheet is installed, the length direction of the profiled steel sheet is perpendicular to the secondary beam of the bin top steel beam, the lap joint of the profiled steel sheet and the profiled steel sheet is fixed in a spot welding manner, the lap joint of the profiled steel sheet and the bin top steel beam is fixedly connected through a welding nail, the joint of the profiled steel sheet and the bin top ring beam is extended into the bin top ring beam and supported on the top surface of the ring beam concrete;
s3: and (4) installing a side mold of the cabin roof floor slab and pouring the cabin roof floor slab.
Preferably, after the profiled steel sheet is installed in the step S2, the space below each wave crest of the profiled steel sheet is blocked by using waste materials or leftover materials; the side edge of the profiled steel sheet is well sealed, so that cement paste is prevented from flowing out during concrete pouring, and pitted surfaces and even holes are formed on the floor slab.
Preferably, the overlapping length of the profiled steel sheet and the profiled steel sheet is more than or equal to one wave crest and more than or equal to 100mm; ensuring the lap joint to be stable.
Preferably, the step S2 further comprises the step of carrying out cornice construction on the bin top floor slab, manufacturing triangular supports by using reinforcing steel bars, arranging the triangular supports at intervals along the circumferential direction of the bin top ring beam, fully paving plywood on the upper sides of cross supports of the triangular supports to serve as a template at the bottom of the cornice, and arranging lateral supports for supporting side forms of the bin top floor slab.
Compared with the prior art, the invention adopting the technical scheme has the outstanding characteristics that:
by the aid of the support-free construction method of the profiled steel sheet, erection and later-stage dismantling of a scaffold or a steel truss are avoided, a large amount of manpower and material resources are saved, construction progress is effectively accelerated, construction cost is reduced, operation is simple and easy to operate in an actual use process, and the method has a good popularization prospect.
Drawings
FIG. 1 is a schematic side view of a profiled steel sheet fixedly connected to a secondary beam of a steel beam at the top of a silo according to an embodiment of the present invention;
FIG. 2 is a schematic side view of the connection between the profiled steel sheet and the ring beam at the top of the silo according to the embodiment of the invention;
FIG. 3 is a schematic top view of a steel roof beam and a ring roof beam according to an embodiment of the present invention;
fig. 4 is a schematic top view of the profiled steel sheet according to the embodiment of the present invention.
In the figure: 1. a secondary beam; 2. a ring beam; 201. a ring beam main rib; 3. profiled steel sheets; 4. welding nails; 5. a triangular support; 6. a plywood panel; 7. and (6) laterally supporting.
Detailed Description
The invention will be further illustrated by the following examples, which are intended only for a better understanding of the present invention and therefore do not limit the scope of the invention.
As shown in fig. 1 to 4, a method for constructing a concrete floor slab on the top of a large-scale silo body structure comprises the following steps:
s1: constructing a bin top steel beam and a bin top ring beam 2, wherein the bin top steel beam comprises main beams and secondary beams 1 connected among the main beams, and the secondary beams 1 are made of I-shaped steel; the concrete finish surface of the silo top ring beam 2 is controlled to be at the same elevation as the bottom template of the silo top floor slab;
s2: installing a bottom template of a cabin top floor slab, adopting a profiled steel sheet 3 as the bottom template of the cabin top floor slab, and arranging the profiled steel sheet 3 in a way that the length direction of the profiled steel sheet is vertical to a secondary beam 1 of a cabin top steel beam when the profiled steel sheet is laid; when the profiled steel sheet 3 is selected, the specification and model of the profiled steel sheet 3 are selected according to the actual arrangement form of steel beams on the top of the silo, the diameter of a large silo in the field of engineering construction is about 20m at present, the design distance of the steel beams on the top is about 2m (including the net distance between the steel beams and the top ring beam 2), therefore, the YX 75-210-840 profiled sheet is selected in the embodiment, the surface is a hot-dip galvanized layer, the thickness of the plate is 1.5mm, and the requirements of the national standard profiled steel sheet 3 for construction (GB/T12755-2008) are met.
The overlapping length of the profiled steel sheet 3 and the profiled steel sheet 3 is more than or equal to one wave crest and more than or equal to 100mm, and the overlapping part is fixed by spot welding; the lap joint of the profiled steel sheet 3 and the steel beam at the top of the bin is fixedly connected by welding nails 4; specifically, the intersecting parts of the wave bottom of the contour plate and the steel beam at the top of the cabin are firmly welded by welding nails 4, at least one welding nail 4 is fixed at each intersecting part, and the specification of the welding nail 4 is M16 multiplied by 80mm; the connecting part of the profiled steel sheet 3 and the bin top ring beam 2 is characterized in that the profiled steel sheet 3 extends into the bin top ring beam 2 and is supported on the concrete top surface of the ring beam 2, the length of the profiled steel sheet 3 extending into the bin top ring beam 2 is not less than the thickness of a steel bar protection layer, and the extending length of the profiled steel sheet is 50mm.
Considering the production requirement, the floor slab at the top of the warehouse is generally designed with a plurality of reserved holes, and the profiled steel is arrangedWhen the plate 3 is used, the reserved hole can be reasonably avoided (if the area of the reserved hole is less than 2 m) 2 And (3) directly and fully paving the profiled steel plates 3, enclosing the civil side formwork to form a reserved hole, and simply cutting the profiled steel plates 3 at the civil side formwork after the concrete of the floor slab is poured.
In order to ensure the sealing performance of the side edge of the profiled steel sheet 3 and avoid cement paste flowing out during concrete pouring to form pitted surfaces and even holes on the floor, after the profiled steel sheet 3 is installed, the space under each wave crest of the profiled steel sheet 3 is blocked by using waste materials or leftover materials; the specific method is to cut leftover materials or waste materials of the profiled steel sheet 3 into iron sheets in the shape of wave crests and weld the iron sheets at the wave crests.
Constructing an outer overhanging eave of a cabin roof floor slab, manufacturing triangular support struts 5 by using reinforcing steel bars, and arranging the triangular support struts 5 at intervals along the annular direction of a cabin roof ring beam 2; the interval between the triangular support struts 5 is set to be 300mm, the triangular support struts 5 are welded and fixed on the ring beam main rib 201 and comprise a horizontal cross strut and an inclined strut obliquely supported below the cross strut, and the cross strut and the inclined strut are both made of reinforcing steel bars with the diameter of 18 mm; the full spread plywood 6 of stull upside is as outer eaves end template, and plywood 6 is 14mm thick, and triangle brace 5 still is provided with the side direction that is used for supporting roof floor side form and supports 7, and the side direction is supported 7 and is adopted the preparation of diameter 10 mm's reinforcing bar and form, and the side form adopts the thick plank sheathing of 14 mm.
S3: and (4) installing a side mold of the cabin roof floor slab and pouring the cabin roof floor slab.
Taking a silo with the diameter of 21 meters as an example, the height of the top of a floor slab at the top of the silo is 49.960m, the thickness of the floor slab is 120mm, the thickness of a vertical wall is 400mm, and the height of an internal platform in the silo is 6.360m, (1) the traditional form of building templates to support a full-space scaffold is adopted according to the comprehensive unit price of the ultrahigh full-space scaffold of 30 yuan/m 3 And (3) calculating: (21/2-0.4) 2 X 3.14 x (49.96-0.12-6.36) x 30=417814.19 yuan; according to the comprehensive unit price of 100 yuan/m of template engineering 2 And (3) calculating: (21/2-0.4) 2 X 3.14 x 100=32031.14 yuan; the construction cost of the single silo is 45 ten thousand yuan. (2) The supporting-free method of the profiled steel sheet 3 is used, the cornice width of the floor slab at the top of the warehouse is 360mm, according to the current market situation, the price of the YX 75-210-840 profiled steel sheet 3 is 50 yuan per square meter,therefore, the price of the material of the single cylinder pressed steel plate 3 is (21/2-0.4 + 0.03) 2 X 3.14 x 50=16110.85 yuan; the theoretical weight of the YX 75-210-840 profiled steel sheet 3 is 17.5kg/m 2 Single-seat silo profiled steel sheet 3 weight (21/2-0.4 + 0.03) 2 X 3.14 x 17.5=5.64 ton, and the installation cost of the profiled steel sheet 3 is calculated according to the installation unit price of the steel structure of 3000 yuan/t: 5.64 × 3000=1697 yuan; the construction cost of the single silo is 3.3 ten thousand yuan. In comparison, by adopting the method of using the profiled steel sheet 3 without support, the cost of a single-seat silo can be saved by 45-3.3=41.7 ten thousand yuan.
According to the method, the profiled steel sheet is used as the bottom die, the supporting force is provided, the scaffold or the steel truss is prevented from being erected and dismantled in the later period, a large amount of manpower and material resources are saved, the construction progress is effectively accelerated, and the construction cost is reduced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims and their equivalents.
Claims (4)
1. A construction method of a concrete floor slab at the top of a large-scale bin body structure comprises the following steps: s1: the construction of the steel beam at the top of the silo and the ring beam at the top of the silo is characterized in that the concrete finish surface of the ring beam at the top of the silo is controlled to be at the same elevation as the bottom template of the floor at the top of the silo;
s2: installing a bottom template of the bin top floor slab, wherein a profiled steel sheet is used as the bottom template of the bin top floor slab, the length direction of the profiled steel sheet is perpendicular to a secondary beam of a steel beam of the bin top during installation, the lap joint of the profiled steel sheet and the profiled steel sheet is fixed by spot welding, the lap joint of the profiled steel sheet and the steel beam of the bin top is fixed by welding nails, the joint of the profiled steel sheet and a ring beam of the bin top is connected, and the profiled steel sheet extends into the ring beam of the bin top and is supported on the concrete top surface of the ring beam;
s3: and (4) installing a side mold of the cabin roof floor slab and pouring the cabin roof floor slab.
2. The construction method of the concrete floor slab on the top of the large-scale cabin body structure according to claim 1, characterized in that: and (S2) after the profiled steel sheet is installed, plugging the space below each wave crest of the profiled steel sheet by using waste materials or leftover materials.
3. The construction method of the concrete floor slab on the top of the large-scale silo structure according to claim 1, characterized in that: the overlapping length of the profiled steel sheet and the profiled steel sheet is more than or equal to one wave crest and more than or equal to 100mm.
4. The construction method of the concrete floor slab on the top of the large-scale cabin body structure according to claim 1, characterized in that: and step S2, carrying out cornice construction on the warehouse top floor slab, manufacturing triangular supports by using reinforcing steel bars, arranging the triangular supports at intervals along the circumferential direction of the warehouse top ring beam, fully paving plywood on the upper sides of cross supports of the triangular supports to serve as a bottom formwork of the cornice, and arranging lateral supports for supporting side forms of the warehouse top floor slab.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211147363.9A CN115288504A (en) | 2022-09-21 | 2022-09-21 | Construction method of concrete floor on top of large-scale bin body structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211147363.9A CN115288504A (en) | 2022-09-21 | 2022-09-21 | Construction method of concrete floor on top of large-scale bin body structure |
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| CN115288504A true CN115288504A (en) | 2022-11-04 |
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| CN202211147363.9A Pending CN115288504A (en) | 2022-09-21 | 2022-09-21 | Construction method of concrete floor on top of large-scale bin body structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116411708A (en) * | 2023-03-31 | 2023-07-11 | 上海宝冶集团有限公司 | Mold-removing-free construction method for outer picking end of fabricated floor support plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201310183Y (en) * | 2008-11-20 | 2009-09-16 | 中国第二冶金建设有限责任公司 | Convenient support device for cornice on silo roof |
| FR2970991A1 (en) * | 2011-01-31 | 2012-08-03 | Hassan Zineddin | Reinforced concrete grain silo assembly, has double curved rings formed of identical modules, where modules have hyperbolic paraboloid geometry and are juxtaposed around circular or polygonal circumference of rings |
| CN104100122A (en) * | 2014-08-01 | 2014-10-15 | 中国化学工程第三建设有限公司 | Construction method of cone-shaped top structure of large silo |
| CN108678181A (en) * | 2018-05-28 | 2018-10-19 | 中国二十二冶集团有限公司 | Silo roof steel truss and concrete combined structure high-altitude construction method |
| CN110835970A (en) * | 2019-12-17 | 2020-02-25 | 龙元建设集团股份有限公司 | Profiled steel sheet structure and construction method |
| CN112554535A (en) * | 2021-01-14 | 2021-03-26 | 中国十五冶金建设集团有限公司 | Construction method for large silo top plate without supporting frame |
-
2022
- 2022-09-21 CN CN202211147363.9A patent/CN115288504A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201310183Y (en) * | 2008-11-20 | 2009-09-16 | 中国第二冶金建设有限责任公司 | Convenient support device for cornice on silo roof |
| FR2970991A1 (en) * | 2011-01-31 | 2012-08-03 | Hassan Zineddin | Reinforced concrete grain silo assembly, has double curved rings formed of identical modules, where modules have hyperbolic paraboloid geometry and are juxtaposed around circular or polygonal circumference of rings |
| CN104100122A (en) * | 2014-08-01 | 2014-10-15 | 中国化学工程第三建设有限公司 | Construction method of cone-shaped top structure of large silo |
| CN108678181A (en) * | 2018-05-28 | 2018-10-19 | 中国二十二冶集团有限公司 | Silo roof steel truss and concrete combined structure high-altitude construction method |
| CN110835970A (en) * | 2019-12-17 | 2020-02-25 | 龙元建设集团股份有限公司 | Profiled steel sheet structure and construction method |
| CN112554535A (en) * | 2021-01-14 | 2021-03-26 | 中国十五冶金建设集团有限公司 | Construction method for large silo top plate without supporting frame |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116411708A (en) * | 2023-03-31 | 2023-07-11 | 上海宝冶集团有限公司 | Mold-removing-free construction method for outer picking end of fabricated floor support plate |
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