CN105298020A - Semi-precast circular steel pipe regenerated mixed concrete pillar and preparation method thereof - Google Patents
Semi-precast circular steel pipe regenerated mixed concrete pillar and preparation method thereof Download PDFInfo
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- CN105298020A CN105298020A CN201510846626.9A CN201510846626A CN105298020A CN 105298020 A CN105298020 A CN 105298020A CN 201510846626 A CN201510846626 A CN 201510846626A CN 105298020 A CN105298020 A CN 105298020A
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Abstract
The invention discloses a semi-precast circular steel pipe regenerated mixed concrete pillar and a preparation method thereof. The pillar comprises a steel pipe, a plurality of mutually separated regenerated mixed concrete sections placed in the axial direction of the inside of the steel pipe in turn, and post-poured new concrete arranged in the interspace of the steel pipe and the regenerated mixed concrete sections in a filling manner, wherein hoisting bent hooks stretching out the top of each regenerated mixed concrete section and short steel bars stretching out the bottom of the regenerated mixed concrete section are respectively pre-buried in the regenerated mixed concrete section; the regenerated mixed concrete sections are poured by waste concrete blocks and concrete; the reserved interspace used for pouring the post-poured new concrete is formed between the adjacent regenerated mixed concrete sections. The precast regenerated mixed concrete sections are adopted, and the construction process of the regenerated mixed concrete is finished in advance independently, so that the problem that in site operation, as the regenerated mixed concrete construction steps are more, the whole construction schedule is influenced is avoided, and important significances are provided for promotion of engineering application of the regenerated mixed concrete pillar.
Description
Technical field
The present invention relates to waste and old concrete to recycle and steel core concrete column component, particularly relate to a kind of half prefabricated round steel pipe renewable hybrid concrete post and preparation method thereof.
Background technology
Concrete-filled circular steel tube column is one very reasonably combined member, has that supporting capacity is high, rigidity is large, ductility is good, the excellent feature of anti-seismic performance, is widely used in civil construction field.Along with the quickening of urbanization process, China's building industry just progressively strides forward towards industrialization of construction industry direction, and one of its feature is exactly greatly develop prefabricated units, to realize the object such as component precision and Quality advance, manpower consumption's reduction, speed of application quickening.If take integral prefabricated way to concrete-filled circular steel tube column, because pillar deadweight is very large, be not easy to transport and lifting; If take the way of prefabricate then on-the-spot splicing assembling to concrete-filled circular steel tube column, then because piece is more and lack between each segmental concrete and effectively connect, pillar globality reduces latent defect position simultaneously and increases.
Due to the exploitation welding of natural sand, stone and reserves day by day reduce, waste and old concrete is as a kind of " special resource " of preciousness, and its recycling more and more arouses extensive attention at home and abroad.Compare with recycled fine aggregate with regenerated coarse aggregate, what adopt larger (waste and old) concrete block physical efficiency of yardstick greatly to simplify waste and old concrete recycles process.But, when waste and old concrete block is applied to concrete-filled circular steel tube column, steel pipe due to job site is in vertical state and highly larger, for ensureing waste and old concrete block and mixing pouring quality between as placed concrete, as placed concrete and waste and old concrete block must be adopted repeatedly alternately to throw in and the way of fully vibrating, a large amount of manpower not only to be spent to throw in for the discontinuity of waste and old concrete block, and greatly dragged slowly site operation progress.
Summary of the invention
The object of the invention is to the shortcoming and defect overcoming above-mentioned prior art, there is provided a kind of structure simple, half prefabricated round steel pipe renewable hybrid concrete post of transport, convenient and quick construction and preparation method thereof, it has, and supporting capacity is high, rigidity is large, ductility is good, the excellent feature of anti-seismic performance.
The present invention is achieved through the following technical solutions:
A kind of half prefabricated round steel pipe renewable hybrid concrete post, comprise steel pipe 1, axially place successively in the inside of steel pipe 1 many spaced renewable hybrid concrete sections 3, and to be filled between steel pipe 1 and each renewable hybrid concrete sections 3 as placed concrete 2 watered after in space; In every root regeneration mix concrete sections 3, be embedded with the lifting crotch 6 stretching out its top and the bar dowel 7 stretched out bottom it respectively.
Described renewable hybrid concrete sections 3 is built by waste and old concrete block 4 and concrete 5 and is formed; The top of the renewable hybrid concrete sections 3 that the end of described bar dowel 7 is all adjacent offsets, and makes to be formed between each adjacent renewable hybrid concrete sections 3 interspacing in advance of the as placed concrete 2 for watering after building.
Described waste and old concrete block 4 is that existent building thing, structure, road, bridge or dykes and dams are removed and the size removed after topping and all or part of reinforcing bar is not less than the waste and old concrete block of 100mm.
The as placed concrete 2 watered after described and concrete 5 are natural aggregate concrete or regenerated aggregate concrete, and compressive strength is not less than 30MPa.
Described waste and old concrete block 4 is 1:4 ~ 1:1 with the mass ratio of concrete 5; The single height of described renewable hybrid concrete sections 3 is not less than 800mm.
The quantity of described bar dowel 7 is 4, and the diameter of each bar dowel 7 is identical and be not less than 20mm, and the exposed parts length of every root bar dowel 7 is 60mm ~ 100mm.
The preparation method of above-mentioned half prefabricated round steel pipe renewable hybrid concrete post is as follows:
(1), during prefabricated renewable hybrid concrete sections 3, forming panel is made in the mode of couching of renewable hybrid concrete sections 3, and pre-buried four bar dowels 7 of difference and lifting crotch 6, in advance waste and old concrete block 4 is fully watered moistening; When building, adopt the waste and old concrete block 4 of disposable input surface wettability in forming panel and then concreting 5 fully to vibrate, after it solidifies, obtain prefabricated renewable hybrid concrete sections 3;
(2) prefabricated renewable hybrid concrete sections 3 is transported to job site, and fully water moistening to it, loop wheel machine is adopted the renewable hybrid concrete sections 3 of surface wettability to be hung in successively mounted steel pipe 1 in advance by lifting crotch 6 inner, and each renewable hybrid concrete sections 3 is alignd vertically, then the as placed concrete 2 watered after pouring into along the space between the side and steel pipe 1 inwall of renewable hybrid concrete sections 3 also inserts vibrating head and fully vibrates, until the space of whole steel pipe 1 inside is filled, half prefabricated round steel pipe renewable hybrid concrete post is obtained after it solidifies.
The present invention, relative to prior art, has following advantage and effect:
The present invention takes half prefabricated way to steel core concrete column, by the concrete of round steel pipe inside be divided into prefabricated and after water two parts: pre-erection is many root regenerations mix concrete sections, separate with bar dowel between it is adjacent, between the side of each renewable hybrid concrete sections and round steel pipe inwall, leave the space of enough inserting vibrating head; After water part for being filled in during site operation between sections side and round steel pipe inwall, and between adjacent renewable hybrid concrete sections after water as placed concrete.Because every root regeneration mix concrete segmental height is limited, make stacking, transport, lifting more for convenience, simultaneously due to after water as placed concrete and can fill space between renewable hybrid concrete sections side and round steel pipe inwall well, and the space between each renewable hybrid concrete sections, the globality of pillar is ensured.
The renewable hybrid concrete of the present invention to round steel pipe inside takes the way of prefabricate, owing to adopting the mode formwork that couches during every root regeneration mix concrete precast segment, so only need in forming panel disposable input waste and old concrete block and then build as placed concrete and fully vibrate, speed of perfusion is obviously accelerated.Renewable hybrid concrete sections prefabricated in advance, not only can ensure the construction quality of sections better, more effectively improve the Replacement rate of waste and old concrete block, but also make job site avoid renewable hybrid concrete build problem, site operation efficiency obviously promotes, and meets the developing direction of industrialization of construction industry.
In sum, the prefabricated way of routine that prior art exists concrete-filled circular steel tube column is not easy to the problem such as transporting and hoisting and the reduction of pillar globality, and the discontinuity of large scale waste and old concrete block in round steel pipe inside is thrown in and be there is the problems such as manpower cost is large, site operation progress is slow simultaneously; Renewable hybrid concrete sections of the present invention can utilize waste and old concrete block to build, and enormously simplify the processing procedures such as fragmentation when waste and old concrete recycles, screening, purification, and the efficient circulation that can realize waste and old concrete utilizes; The prefabricated every root regeneration mix concrete segmental height of the present invention is limited, make stacking, transport, lifting more for convenience, simultaneously due to after water as placed concrete and can fill space between renewable hybrid concrete sections side and round steel pipe inwall well, and the space between each renewable hybrid concrete sections, the globality of pillar is ensured; Renewable hybrid concrete sections of the present invention prefabricated in advance, not only can ensure the construction quality of sections better, more effectively improve the Replacement rate of waste and old concrete block, but also make job site avoid renewable hybrid concrete build problem, site operation efficiency obviously promotes, and meets the developing direction of industrialization of construction industry.
Accompanying drawing explanation
Fig. 1 is the present invention half prefabricated round steel pipe renewable hybrid concrete post horizontal section schematic diagram.
Fig. 2 is the present invention half prefabricated round steel pipe renewable hybrid concrete post longitudinal profile schematic diagram.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is more specifically described in detail.
Embodiment 1
As shown in Figure 1, 2.A kind of half prefabricated round steel pipe renewable hybrid concrete post of the present invention, comprise steel pipe 1, axially place successively in the inside of steel pipe 1 many spaced renewable hybrid concrete sections 3, and to be filled between steel pipe 1 and each renewable hybrid concrete sections 3 as placed concrete 2 watered after in space.
In every root regeneration mix concrete sections 3, be embedded with the lifting crotch 6 stretching out its top and the bar dowel 7 stretched out bottom it respectively.
Described renewable hybrid concrete sections 3 is built by waste and old concrete block 4 and concrete 5 and is formed; The top of the renewable hybrid concrete sections 3 that the end of described bar dowel 7 is all adjacent offsets, and makes to be formed between each adjacent renewable hybrid concrete sections 3 interspacing in advance of the as placed concrete 2 for watering after building.
Described steel pipe 1 external diameter 500mm, wall thickness 6mm, steel pipe length 4000mm, the renewable hybrid concrete sections 3 bottom surface length of side is 345mm, high 1200mm, and bar dowel 7 stretches out bottom surface 100mm, and lifting crotch 6 stretches out end face 50mm.Type of steels Q235, actual measurement yield strength 265MPa, tensile strength 361.2MPa.
Renewable hybrid concrete sections 3 is mixed by the waste and old concrete block 4 of cubic compressive strength 30MPa and the concrete 5 of cubic compressive strength 40MPa, after mixing, cubic compressive strength is 36MPa, after the cubic compressive strength of as placed concrete 2 that waters be 40MPa.Waste and old concrete block 4 is removed for existent building thing and is removed the waste and old concrete block after topping and whole reinforcing bar, concrete 5 and after the as placed concrete 2 that waters be natural aggregate concrete.The characteristic size of waste and old concrete block 4 is 100 ~ 200mm, and waste and old concrete block 4 is 1:1.5 with the mass ratio of concrete 5 in renewable hybrid concrete sections 3, in the whole concrete of steel duct, waste and old concrete block 4 and other all concrete mass ratioes are 1:3.
The preparation method of the present invention half prefabricated round steel pipe renewable hybrid concrete post realizes by following steps:
(1), during prefabricated renewable hybrid concrete sections 3, forming panel is made in the mode of couching of renewable hybrid concrete sections 3, and pre-buried four bar dowels 7 of difference and lifting crotch 6, in advance waste and old concrete block 4 is fully watered moistening; When building, adopt the waste and old concrete block 4 of disposable input surface wettability in forming panel and then concreting 5 fully to vibrate, after it solidifies, obtain prefabricated renewable hybrid concrete sections 3;
(2) prefabricated renewable hybrid concrete sections 3 is transported to job site, and fully water moistening to it, loop wheel machine is adopted the renewable hybrid concrete sections 3 of surface wettability to be hung in successively mounted steel pipe 1 in advance by lifting crotch 6 inner, and each renewable hybrid concrete sections 3 is alignd vertically, then the as placed concrete 2 watered after pouring into along the space between the side and steel pipe 1 inwall of renewable hybrid concrete sections 3 also inserts vibrating head and fully vibrates, until the space of whole steel pipe 1 inside is filled, half prefabricated round steel pipe renewable hybrid concrete post is obtained after it solidifies.
For the purpose of contrast, get external diameter 500mm, wall thickness 6mm and the identical round steel pipe of material, the natural aggregate concrete of cubic compressive strength to be the waste and old concrete block of 30MPa and cubic compressive strength be 40MPa, and waste and old concrete block and the concrete mass ratio of natural aggregate are 1:3, directly alternately input is built in steel pipe, makes the round steel pipe renewable hybrid concrete post of conventional on-site construction.8854kN is by the axial press capacity calculating two kinds of concrete columns, but the present invention half prefabricated round steel pipe renewable hybrid concrete post can simplify on-the-spot loaded down with trivial details construction process, engineering time and cost of labor can be saved, be beneficial to the suitability for industrialized production of steel tube regeneration mix concrete post.
Embodiment 2
The present embodiment is except following characteristics, and other features are identical with embodiment 1.
Described steel pipe 1 external diameter 600mm, wall thickness 8mm, steel pipe length 4000mm, the renewable hybrid concrete sections 3 bottom surface length of side is 410mm, high 1200mm, and bar dowel 7 stretches out bottom surface 100mm, and lifting crotch 6 stretches out end face 50mm.Type of steels Q235, actual measurement yield strength 270MPa, tensile strength 368.7MPa.
Renewable hybrid concrete sections 3 is mixed by the waste and old concrete block 4 of cubic compressive strength 30MPa and the concrete 5 of cubic compressive strength 40MPa, after mixing, cubic compressive strength is 36MPa, after the cubic compressive strength of as placed concrete 2 that waters be 40MPa.
For the purpose of contrast, get external diameter 600mm, wall thickness 8mm and the identical round steel pipe of material, the natural aggregate concrete of cubic compressive strength to be the waste and old concrete block of 30MPa and cubic compressive strength be 40MPa, and waste and old concrete block and the concrete mass ratio of natural aggregate are 1:3, directly alternately input is built in steel pipe, makes the round steel pipe renewable hybrid concrete post of conventional on-site construction.13290kN is by the axial press capacity calculating two kinds of concrete columns, but the present invention half prefabricated round steel pipe renewable hybrid concrete post can simplify on-the-spot loaded down with trivial details construction process, engineering time and cost of labor can be saved, be beneficial to the suitability for industrialized production of steel tube regeneration mix concrete post.
Embodiment 3
The present embodiment is except following characteristics, and other features are identical with embodiment 1.
Described steel pipe 1 external diameter 500mm, wall thickness 6mm, steel pipe length 4000mm, the renewable hybrid concrete sections 3 bottom surface length of side is 345mm, high 1200mm, and bar dowel 7 stretches out bottom surface 100mm, and lifting crotch 6 stretches out end face 50mm.Type of steels Q235, actual measurement yield strength 265MPa, tensile strength 362.9MPa.
Renewable hybrid concrete sections 3 is mixed by the waste and old concrete block 4 of cubic compressive strength 30MPa and the concrete 5 of cubic compressive strength 30MPa, after mixing, cubic compressive strength is 30MPa, after the cubic compressive strength of as placed concrete 2 that waters be 30MPa.For the purpose of contrast, get external diameter 500mm, wall thickness 6mm and the identical round steel pipe of material, the natural aggregate concrete of cubic compressive strength to be the waste and old concrete block of 30MPa and cubic compressive strength be 30MPa, directly alternately input is built in steel pipe, makes the round steel pipe renewable hybrid concrete post of conventional on-site construction.7671kN is by the axial press capacity calculating two kinds of concrete columns, but the present invention half prefabricated round steel pipe renewable hybrid concrete post can simplify on-the-spot loaded down with trivial details construction process, engineering time and cost of labor can be saved, be beneficial to the suitability for industrialized production of steel tube regeneration mix concrete post.
As mentioned above, just the present invention can be realized preferably.
Embodiments of the present invention are not restricted to the described embodiments; other are any do not deviate from Spirit Essence of the present invention and principle under do change, modification, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1. one and half prefabricated round steel pipe renewable hybrid concrete posts, it is characterized in that comprising steel pipe (1), axially place successively in the inside of steel pipe (1) many spaced renewable hybrid concrete sections (3), and to be filled between steel pipe (1) and each renewable hybrid concrete sections (3) as placed concrete (2) watered after in space; In every root regeneration mix concrete sections (3), be embedded with the lifting crotch (6) stretching out its top and the bar dowel (7) stretched out bottom it respectively.
2. half prefabricated round steel pipe renewable hybrid concrete post according to claim 1, is characterized in that: described renewable hybrid concrete sections (3) is built by waste and old concrete block (4) and concrete (5) and formed; The top of the renewable hybrid concrete sections (3) that the end of described bar dowel (7) is all adjacent offsets, and makes to be formed between each adjacent renewable hybrid concrete sections (3) interspacing in advance of as placed concrete (2) for watering after building.
3. half prefabricated round steel pipe renewable hybrid concrete post according to claim 2, is characterized in that: described waste and old concrete block (4) to be removed and the size removed after topping and all or part of reinforcing bar is not less than the waste and old concrete block of 100mm for existent building thing, structure, road, bridge or dykes and dams.
4. according to claim 1,2 or 3 half prefabricated round steel pipe renewable hybrid concrete post, it is characterized in that: the as placed concrete (2) watered after described and concrete (5) are natural aggregate concrete or regenerated aggregate concrete, and compressive strength is not less than 30MPa.
5. half prefabricated round steel pipe renewable hybrid concrete post according to claim 2, is characterized in that: described waste and old concrete block (4) is 1:4 ~ 1:1 with the mass ratio of concrete (5); The single height of described renewable hybrid concrete sections (3) is not less than 800mm.
6. half prefabricated round steel pipe renewable hybrid concrete post according to claim 4, is characterized in that: the exposed height of described lifting crotch (6) is less than 60mm.
7. half prefabricated round steel pipe renewable hybrid concrete post according to claim 4, it is characterized in that: the quantity of described bar dowel (7) is 4, the diameter of each bar dowel (7) is identical and be not less than 20mm, and the exposed parts length of every root bar dowel (7) is 60mm ~ 100mm.
8. the preparation method of half prefabricated round steel pipe renewable hybrid concrete post according to any one of claim 1 to 7, is characterized in that comprising the steps:
(1) time prefabricated renewable hybrid concrete sections (3), forming panel is made in the mode of couching of renewable hybrid concrete sections (3), and pre-buried four bar dowels (7) and lifting crotch (6) respectively, in advance waste and old concrete block (4) is fully watered moistening; When building, adopt the waste and old concrete block (4) of disposable input surface wettability in forming panel and then concreting (5) fully to vibrate, after it solidifies, obtain prefabricated renewable hybrid concrete sections (3);
(2) prefabricated renewable hybrid concrete sections (3) is transported to job site, and fully water moistening to it, loop wheel machine is adopted the renewable hybrid concrete sections (3) of surface wettability to be hung in successively mounted steel pipe (1) in advance by lifting crotch (6) inner, and each renewable hybrid concrete sections (3) is alignd vertically, then the as placed concrete (2) watered after pouring into along the space between the side and steel pipe (1) inwall of renewable hybrid concrete sections (3) also inserts vibrating head and fully vibrates, until the space of whole steel pipe (1) inside is filled, half prefabricated round steel pipe renewable hybrid concrete post is obtained after it solidifies.
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| CN105926853A (en) * | 2016-06-07 | 2016-09-07 | 华南理工大学 | Semi-precast concrete filled steel tubular column with built-in high-strength structural steel and manufacturing method thereof |
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| CN109025063A (en) * | 2018-08-01 | 2018-12-18 | 广州五羊建设机械有限公司 | The production method of sectional type steel tube regeneration mixing component and its positioner used |
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| CN109356185A (en) * | 2018-10-30 | 2019-02-19 | 南昌大学 | A kind of prefabricated pier foundation of regeneration monolith and its construction method |
| CN111851861A (en) * | 2020-07-30 | 2020-10-30 | 华南理工大学 | Partially prefabricated reinforced structure of existing H-shaped steel column and construction process thereof |
| CN112417548A (en) * | 2020-11-03 | 2021-02-26 | 杭州铁木辛柯建筑结构设计事务所有限公司 | Method for improving one-way bending limit bearing capacity of circular steel tube concrete column cross section |
| CN112417548B (en) * | 2020-11-03 | 2024-02-20 | 杭州铁木辛柯建筑结构设计事务所有限公司 | Method for improving unidirectional bending limit bearing of cross section of round steel tube concrete column |
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