CN108532833A - A kind of regeneration concrete coupled column and preparation method thereof - Google Patents

A kind of regeneration concrete coupled column and preparation method thereof Download PDF

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Publication number
CN108532833A
CN108532833A CN201810459393.0A CN201810459393A CN108532833A CN 108532833 A CN108532833 A CN 108532833A CN 201810459393 A CN201810459393 A CN 201810459393A CN 108532833 A CN108532833 A CN 108532833A
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China
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concrete
alloy pipe
round steel
regeneration
pipe
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CN201810459393.0A
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CN108532833B (en
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袁彬
陈誉
何康
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Yangtze University
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Yangtze University
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/30Columns; Pillars; Struts
    • E04C3/34Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00Producing shaped prefabricated articles from the material
    • B28B1/04Producing shaped prefabricated articles from the material by tamping or ramming
    • B28B1/045Producing shaped prefabricated articles from the material by tamping or ramming combined with vibrating or jolting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00Producing shaped prefabricated articles from the material
    • B28B1/14Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
    • B28B1/16Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted for producing layered articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/24Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
    • B28B11/245Curing concrete articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00Moulds; Cores; Mandrels
    • B28B7/22Moulds for making units for prefabricated buildings, i.e. units each comprising an important section of at least two limiting planes of a room or space, e.g. cells; Moulds for making prefabricated stair units
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements

Abstract

The present invention relates to a kind of regeneration concrete coupled columns and preparation method thereof, belong to field of engineering building.The regeneration concrete coupled column, including round steel pipe and square aluminium-alloy pipe, the side's of being provided with aluminium-alloy pipe in round steel pipe, are filled with regeneration concrete layer, ultra-high performance concrete are filled in square aluminium-alloy pipe between round steel pipe and square aluminium-alloy pipe(UHPC)Layer;On square aluminium-alloy pipe inner wall multigroup ribbed stiffener is provided in levels are stacked;It is provided with screw thread on round steel inside pipe wall.The present invention forms Aggregate of recycled concrete by using discarded building waste, reduces the cost of regeneration concrete, resource utilization is high, environmentally protective.Pouring using placement layer by layer technique for the coupled column concrete layer, is effectively shortened construction period, reduces construction cost.The coupled column mechanical property has effectively delayed the generation of local buckling close to rigid structure, significantly improves the performances such as its bearing capacity deposit, ductility, durability, apyrous.

Description

A kind of regeneration concrete coupled column and preparation method thereof
Technical field
The present invention relates to a kind of regeneration concrete coupled columns and preparation method thereof, belong to field of engineering building.
Background technology
Effect of contraction is provided to the concrete of core space due to steel pipe in concrete filled steel tube coupled column, produces sleeve effect It answers, there is the advantages that Compressive Bearing Capacity is high, plasticity and good toughness, fire resistance is good, concrete filled steel tube coupled column can reduce structure Plastic displacement, the energy dissipation capacity for increasing structure, the whole anti-seismic performance for improving building are building skyscraper and bridge structure In be widely adopted.
Now with the transformation in city, all kinds of high-rises and architectural engineering are more and more, and the dismounting of old building must So causing to generate largely discarded building waste in city, the processing of these building wastes not only needs the stockyard of large area, and And a large amount of manpower and materials are expended, therefore, increases to greatest extent and building trade is met to the regeneration of building waste can hold The requirement of supervention exhibition.In the prior art, by the abandoned building concrete in building waste by being used as regeneration coagulation after fragmentation Native aggregate, when core space of the regeneration concrete for concrete filled steel tube coupled column is made in aggregate, due to existing regeneration coagulation Pedosphere surface intensity will be less than the boundary strength of natural aggregate, strong less than normal concrete so as to cause the intensity of regeneration concrete Degree, while when discarded concrete is as aggregate, interface hole will be more than the interface hole of natural aggregate, and existing regeneration mixes Solidifying soil water absorption rate is higher, this can all lead to the low, poor toughness using concrete filled steel tube coupled column intensity made of discarded concrete, It is susceptible to damage under the action of large span and big load, reduce concrete filled steel tube coupled column to a certain extent uses the longevity Life.
Invention content
It is an object of the invention to:Offer is a kind of simple in structure, and practicability is good, short construction period, and construction cost is low, regenerates Concrete utilization rate is high;The performances such as the bearing capacity deposit of component, ductility, durability, apyrous can be effectively improved, and then improve it Regeneration concrete coupled column of service life and preparation method thereof.
The technical scheme is that:
A kind of regeneration concrete coupled column, including round steel pipe and square aluminium-alloy pipe, it is characterised in that:The side's of being provided with aluminium in round steel pipe Compo pipe is filled with regeneration concrete layer, is mixed filled with very-high performance in square aluminium-alloy pipe between round steel pipe and square aluminium-alloy pipe Solidifying soil(UHPC)Layer;On the square aluminium-alloy pipe inner wall multigroup ribbed stiffener is provided in levels are stacked;On round steel inside pipe wall It is provided with screw thread;
The ultra-high performance concrete is made of the raw material of following weight parts:
27~38 silicon ash of cement, 8.5~9.5 levigate quartz sand 5~8
39~41 metallic fiber of fine sand, 5.5~8 high efficiency water reducing agent 0.5~1
Water 5.5~8
The metallic fiber is 6 by steel fibre and amorphous alloy fiber weight ratio:5 are constituted;
The high efficiency water reducing agent is powdery, is the highly concentrated naphthalene water reducer of commercially available building concrete, and manufacturer is:Admire in Shanghai And Chemical Co., Ltd., product type:QH806;
It is added after being weighed cement, silicon ash, levigate quartz sand, fine sand, metallic fiber, high efficiency water reducing agent by above-mentioned parts by weight To being stirred in blender, after being uniformly mixed, after adding water to continue stirring 2 minutes, obtain, ultra-high performance concrete;
The regeneration concrete is made of the raw material of following weight parts(Unit:Gram):
40~45 water 15~20 of ultra-high performance concrete
15~20 recycled fine aggregate 18~25 of regenerated coarse aggregate
The regeneration concrete is made of the raw material of following weight parts(Unit:Gram):
42~44 water 17~19 of ultra-high performance concrete
17~19 recycled fine aggregate 19~22 of regenerated coarse aggregate
The regeneration concrete is made of the raw material of following weight parts(Unit:Gram):
43.4 water 18.6 of ultra-high performance concrete
18 recycled fine aggregate 20 of regenerated coarse aggregate
The regenerated coarse aggregate and recycled fine aggregate is made of discarded concrete through crushing grinding respectively;
The preparation method of regenerated coarse aggregate is:
The impurity such as glass, plastics and reinforcing bar in discarded concrete are removed first, with crusher by discarded concrete crushing grinding The regenerated coarse aggregate that grain size is 5~25 mm is filtered out by 25 apertures mm afterwards, regenerated coarse aggregate is then rinsed with water, in nature Under the conditions of dried;
The preparation method of recycled fine aggregate is:
Above-mentioned partial regeneration coarse aggregate is carried out to filter out the regeneration that grain size is 5~10 mm by 10 apertures mm after being crushed again Fine aggregate is then rinsed with water recycled fine aggregate, is dried under field conditions (factors);
The preparation of regeneration concrete includes the following steps:
1), weigh ultra-high performance concrete and water by above-mentioned mass parts, and the two is stirred to be uniformly mixed, slurries is made, , cement mortar;It is spare;
2), by above-mentioned mass parts weigh regenerated coarse aggregate and recycled fine aggregate respectively, then by regenerated coarse aggregate and regenerate thin bone Material is separately immersed in a concentration of 5% sodium silicate solution, drips regenerated coarse aggregate and recycled fine aggregate respectively after impregnating 1 hour Go out;
3), the regenerated coarse aggregate of bleeding is uniformly immersed in part of cement slurry, the quality between regenerated coarse aggregate and cement mortar Than being 7:3, immersion drains after ten minutes, and is obtained, regenerated coarse aggregate premix after dry 15 minutes under the conditions of 75 DEG C;
4), the recycled fine aggregate of bleeding is uniformly immersed in remaining cement mortar, the matter between recycled fine aggregate and cement mortar Amount is than being 1:1, immersion drains after ten minutes, and is obtained, recycled fine aggregate premix after dry 15 minutes under the conditions of 75 DEG C;
5), finally above-mentioned regenerated coarse aggregate premix and recycled fine aggregate premix are mixed evenly after, obtain, regenerate coagulation Soil;
The preparation method of regeneration concrete coupled column includes the following steps:
1), according to construction requirement, by the ratio of the diameter 0.4 of the bottom surface length of side and round steel pipe of square aluminium-alloy pipe;Selection is certain straight The round steel pipe of diameter and the square aluminium-alloy pipe of go-no-go, and on square aluminium-alloy pipe inner wall multigroup add is provided in levels are stacked Strength rib, to enhance the bearing capacity and ductility of the coupled column;It is threaded on round steel inside pipe wall;To increase intensity when pouring;
2), square aluminium-alloy pipe is lifted to the position of installation and carries out perpendicularity correction and tests, be disposed vertically with guarantor's aluminium-alloy pipe, Avoid the occurrence of inclination;Pass through the engineering control network central point of total powerstation positioning side aluminium-alloy pipe again;
3), foundation side's aluminium-alloy pipe central point;Round steel pipe is lifted according to a conventional method, and ensures round steel pipe and square aluminium-alloy pipe Concentricity;The regeneration concrete of 40cm thickness is poured in the annular space of the round steel pipe of the bottom periphery of square aluminium-alloy pipe again, so that circle Steel pipe and square aluminium-alloy pipe are cohered with pedestal fixation;
4), after round steel pipe and square aluminium-alloy pipe cohere with pedestal fixation, in the annular space between round steel pipe and square aluminium-alloy pipe with Regeneration concrete and ultra-high performance concrete are poured respectively in square aluminium-alloy pipe;
5), very-high performance coagulation in regeneration concrete and square aluminium-alloy pipe in annular space between round steel pipe and square aluminium-alloy pipe Soil is poured by way of being layered and replacing and pour, and the thickness poured per layer concrete is:1m~2m;
6), pour per layer concrete after, vibrating spear is inserted into natural vertical configuration in poured concrete and is shaken It smashes, the depth that vibrating spear is inserted into concrete layer is 50~100cm, and each vibrating time is 20~30s;The each displacement of vibrating spear For 30~35cm, and keep holding the spacing of 50~100mm with round steel tube wall and side's aluminium alloy tube wall, to avoid vibrating spear and round steel Tube wall or square aluminium alloy tube wall collide and cause to damage;
7), the concrete surface that pours when every layer is flat and no longer significantly sinks, bubble-free discharge, stops shaking when starting bleeding It smashes, the purpose vibrated per layer concrete is to ensure that concrete layer is closely knit, to improve the bearing capacity of the coupled column, and prevents Leakage pounds the case where avoiding concrete disintegration;
8), pour per layer concrete after the completion of, it is with spherical surface stick that its surface rolling is more when concrete surface is close to pre-hardening state A convex nest of spherical surface, then be rinsed with water the dirt of concrete surface, clears up the bleeding on surface so that itself and adjacent concrete layer it Between closely knit contact;Increase the linking performance between adjacent layer, next coagulation is poured under the status condition that its surface keeps moistening Soil layer;So cycle, until completing the one-piece casting of regeneration concrete and ultra-high performance concrete;
9), regeneration concrete and ultra-high performance concrete one-piece casting after the completion of, respectively to round steel pipe and square aluminium-alloy pipe it Between regeneration concrete and square aluminium-alloy pipe in ultra-high performance concrete conserved, regeneration concrete layer uses curing film packet It wraps up in method of curing to be conserved, i.e., by the way that curing film package is adhered to the surface of regeneration concrete layer so that regeneration concrete layer It keeps moistening and its surface is avoided to form ponding, curing cycle is 7~9 days;
10), high performance concrete layer first with 90 DEG C of water to ultra-high performance concrete layer carry out watering so that its keep moistening simultaneously And its surface is avoided to form ponding, maintenance is conserved after 3~4 days using steam comb according to baking method, that is, is passed through 90 DEG C of steam Dry heating curing is carried out after 4~5 days, is obtained, regeneration concrete coupled column finished product.
The round steel pipe is hot rolled circular steel pipe or cold-drawn round steel pipe.
The ribbed stiffener is rectangular slab, and ribbed stiffener is uniformly distributed on square aluminium-alloy pipe inner wall, adjacent in circumferential direction to put more energy into Angle between rib is 45 degree or 90 degree.
The ratio of the long side of the ribbed stiffener and the bottom surface length of side of square aluminium-alloy pipe is 0.3~0.5.
The ratio of the height of the short side of the ribbed stiffener and square aluminium-alloy pipe is not less than 0.11.
The beneficial effects of the present invention are:
Placement in layers has regeneration concrete between the round steel pipe of the regeneration concrete coupled column and square aluminium-alloy pipe, and round steel pipe is to again Good effect of contraction is played in the deformation of growing concrete, and to improve the bearing capacity of the coupled column, regeneration concrete is using useless Concrete is abandoned as recycled aggregate, is handled by slurries, reduces the interface hole of recycled aggregate, so that regeneration concrete Water absorption rate reduce, further improve the bearing capacity of the coupled column, by making full use of discarded building waste, it is mixed to form regeneration Solidifying soil aggregate, reduces the cost of regeneration concrete, resource utilization is high, environmentally protective.The coupled column is added by interior set Strength rib side aluminium-alloy pipe, prefabricated forming, easy construction, in square aluminium-alloy pipe by placement in layers ultra-high performance concrete after, together When ultra-high performance concrete and ribbed stiffener bond after, ensure that the stability of the coupled column, mechanical property have close to rigid structure Effect limits each of peripheral regeneration concrete and delays local buckling to deformation, significantly improves the bearing capacity of the coupled column The performances such as deposit, ductility, durability, apyrous.
In order to illustrate influence of the ultra-high performance concrete to the compression strength of the coupled column of different ratios of raw materials, to sieve Select the ultra-high performance concrete with optimum proportioning, the application to cement, silicon ash, levigate quartz sand, fine sand, metallic fiber, The proportioning of high efficiency water reducing agent and water is tested, as a result as shown in Table 1:
Influence of the ultra-high performance concrete of one different ratios of raw materials of table to the coupled column compression strength
In order to illustrate the different influences to the composite column structure intensity of proportioning of steel fibre in metallic fiber and amorphous alloy fiber, The application tests different weight part dosage of steel fibre and amorphous alloy fiber, as a result as shown in Table 2:
Different weight part volume of two steel fibre of table and amorphous alloy fiber
Influence to the composite column structure intensity
In order to select the metallic fiber of suitable fibers shape to mix into UHPC, with ensure coupled column of the present invention compression strength and Flexural strength reaches best, therefore selects the weight of the steel fibre incorporation and amorphous alloy fiber incorporation in metallic fiber raw material Part ratio is 3:2.5, as a result as shown in Table 3:
Influence of three fiber shape of table to the coupled column
It is incorporated into UHPC so the present invention selects end to hook fiber type.
It, will be right in the present invention in order to illustrate different maintenance processes to the compression strength of coupled column and the influence of flexural strength The maintenance process of coupled column carries out contrast test respectively with standard curing, High Temperature Curing method, as a result as shown in Table 4:
Influence of the different maintenance processes of table four to coupled column
After coupled column of the present invention is carried out high-temperature process with common column, common regeneration concrete column respectively, remnant compressive strengths remain The comparing result of remaining flexural strength and ductility factor is as shown in Table 5:
Five high temperature of table(500℃)The residual load bearing capacity of various coupled columns afterwards
Description of the drawings
Fig. 1 is the overlooking structure diagram of the present invention;
Fig. 2 is the cross-sectional structure schematic diagram of the ribbed stiffener of the present invention.
In figure:1, round steel pipe, 2, regeneration concrete layer, 3, square aluminium-alloy pipe, 4, ultra-high performance concrete layer, 5, put more energy into Rib.
Specific implementation mode
By taking pillar height 10m as an example:
The regeneration concrete coupled column includes round steel pipe 1 and square aluminium-alloy pipe 3, and round steel pipe 1 is hot rolled circular steel pipe 1 or cold-drawn round steel Pipe 1, the side's of being provided with aluminium-alloy pipe 3 in round steel pipe 1 are filled with regeneration concrete layer 2, side between round steel pipe 1 and square aluminium-alloy pipe 3 Ultra-high performance concrete is filled in aluminium-alloy pipe 3(UHPC)Layer;On 3 inner wall of square aluminium-alloy pipe in levels it is stacked be provided with it is more Group ribbed stiffener 5;Ribbed stiffener 5 is rectangular slab, and ribbed stiffener 5 is uniformly distributed on 3 inner wall of square aluminium-alloy pipe, adjacent ribbed stiffener in circumferential direction Angle between 5 is 45 degree or 90 degree;The ratio of the long side of ribbed stiffener 5 and the bottom surface length of side of square aluminium-alloy pipe 3 is 0.3~0.5, The ratio of the height of the short side of ribbed stiffener 5 and square aluminium-alloy pipe 3 is not less than 0.11.
It is provided with screw thread on 1 inner wall of round steel pipe;The weight ratio of steel fibre and amorphous alloy fiber is 6 in metallic fiber:5; High efficiency water reducing agent is powdery, is the highly concentrated naphthalene water reducer of commercially available building concrete, and manufacturer is:Shanghai is admired and chemical industry is limited Company, product type:QH806.
Each embodiment raw material dosage is:
It is added after being weighed cement, silicon ash, levigate quartz sand, fine sand, metallic fiber, high efficiency water reducing agent by above-mentioned parts by weight To being stirred in blender, after being uniformly mixed, ultra-high performance concrete is made after adding water to continue stirring 2 minutes;
The preparation of regenerated coarse aggregate:
The impurity such as glass, plastics and reinforcing bar in discarded concrete are removed first, with crusher by discarded concrete crushing grinding The regenerated coarse aggregate that grain size is 5~25 mm is filtered out by 25 apertures mm afterwards, regenerated coarse aggregate is then rinsed with water, in nature Under the conditions of dried;
Recycled fine aggregate is prepared as:
Above-mentioned partial regeneration coarse aggregate is carried out to filter out the regeneration that grain size is 5~10 mm by 10 apertures mm after being crushed again Fine aggregate is then rinsed with water recycled fine aggregate, is dried under field conditions (factors);
The preparation of regeneration concrete includes the following steps:
Ultra-high performance concrete and water are weighed by above-mentioned mass parts, and the two is stirred to be uniformly mixed, slurries is made, is obtained, water Mud;It is spare;Regenerated coarse aggregate and recycled fine aggregate are weighed respectively by above-mentioned mass parts again, then by regenerated coarse aggregate and regeneration Fine aggregate is separately immersed in a concentration of 5% sodium silicate solution, by regenerated coarse aggregate and recycled fine aggregate point after impregnating 1 hour It does not leach;The regenerated coarse aggregate of bleeding is uniformly immersed in part of cement slurry, the quality between regenerated coarse aggregate and cement mortar Than being 7:3, immersion drains after ten minutes, and is obtained, regenerated coarse aggregate premix after dry 15 minutes under the conditions of 75 DEG C.
The recycled fine aggregate of bleeding is uniformly immersed in remaining cement mortar, the matter between recycled fine aggregate and cement mortar Amount is than being 1:1, immersion drains after ten minutes, and is obtained, recycled fine aggregate premix after dry 15 minutes under the conditions of 75 DEG C.It will After the regenerated coarse aggregate premix and recycled fine aggregate premix of above-mentioned preparation are mixed evenly, obtain, regeneration concrete.
The preparation of regeneration concrete coupled column:
According to construction requirement, by the ratio of the bottom surface length of side and the diameter 0.4 of round steel pipe 1 of square aluminium-alloy pipe 3;Select certain diameter Round steel pipe 1 and go-no-go square aluminium-alloy pipe 3, and on 3 inner wall of square aluminium-alloy pipe in levels it is stacked be provided with it is multigroup Ribbed stiffener 5, to enhance the bearing capacity and ductility of the coupled column;It is threaded on 1 inner wall of round steel pipe;It is strong when being poured with increasing Degree;Square aluminium-alloy pipe 3 is lifted the extremely position of installation and carries out perpendicularity correction and is tested, is disposed vertically, is kept away with guarantor's aluminium-alloy pipe 3 Exempt to tilt;Pass through the engineering control network central point of total powerstation positioning side aluminium-alloy pipe 3 again.
The central point of foundation side's aluminium-alloy pipe 3;Round steel pipe 1 is lifted according to a conventional method, and ensures round steel pipe 1 and square aluminium alloy The concentricity of pipe 3;The regeneration concrete of 40cm thickness is poured in the annular space of the round steel pipe of the bottom periphery of square aluminium-alloy pipe 3 again, So that round steel pipe 1 and square aluminium-alloy pipe 3 are cohered with pedestal fixation;After round steel pipe 1 and square aluminium-alloy pipe 3 are cohered with pedestal fixation, Regeneration concrete and very-high performance are poured respectively in annular space between round steel pipe 1 and square aluminium-alloy pipe 3 and in square aluminium-alloy pipe 3 Concrete.
The very-high performance in the regeneration concrete and square aluminium-alloy pipe 3 in annular space between round steel pipe 1 and square aluminium-alloy pipe 3 Concrete is poured by way of being layered and replacing and pour, and the thickness poured per layer concrete is:1m~2m;Every layer of coagulation After soil pours, vibrating spear is inserted into natural vertical configuration in poured concrete and is vibrated, vibrating spear is inserted into mixed The depth of solidifying soil layer is 50~100cm, and each vibrating time is 20~30s;The each displacement of vibrating spear is 30~35cm, and is protected The spacing for holding 50~100mm with 1 wall of round steel pipe and square 3 wall of aluminium-alloy pipe is held, is closed to avoid vibrating spear and 1 wall of round steel pipe or square aluminium 3 wall of golden pipe collides and causes to damage.
Stop shaking when the concrete surface that every layer pours is flat and no longer significantly sinking, bubble-free discharge, beginning bleeding It smashes, the purpose vibrated per layer concrete is to ensure that concrete layer is closely knit, to improve the bearing capacity of the coupled column, and prevents Leakage pounds the case where avoiding concrete disintegration;After the completion of being poured per layer concrete, when concrete surface is close to pre-hardening state, With spherical surface stick by the convex nest of the multiple spherical surfaces of its surface rolling, then it is rinsed with water the dirt of concrete surface, clears up the bleeding on surface, with It is set closely knit between adjacent concrete layer to contact;Increase the linking performance between adjacent layer, moistening is kept on its surface Next concrete layer is poured under status condition;So cycle, until completing the entirety of regeneration concrete and ultra-high performance concrete It pours.
After the completion of the one-piece casting of regeneration concrete and ultra-high performance concrete, respectively to round steel pipe 1 and square aluminium-alloy pipe 3 Between regeneration concrete and square aluminium-alloy pipe 3 in ultra-high performance concrete conserved, regeneration concrete layer 2 is using maintenance Film package method of curing is conserved, i.e., by the way that curing film package to be adhered to the surface of regeneration concrete layer 2 so that regeneration is mixed Solidifying soil layer 2 keeps moistening and its surface is avoided to form ponding, and curing cycle is 7~9 days.High performance concrete layer is first with 90 DEG C water carries out watering to ultra-high performance concrete layer 4 so that it keeps moistening and its surface is avoided to form ponding, conserves 3~4 It is conserved using steam comb according to baking method after it, that is, is passed through 90 DEG C of steam and carries out dry heating curing after 4~5 days, obtain, regeneration is mixed Solidifying local soil type zygostyle finished product;The ultimate bearing capacity of the coupled column is improved by the combination maintenance process.

Claims (10)

1. a kind of regeneration concrete coupled column, including round steel pipe(1)With square aluminium-alloy pipe(3), it is characterised in that:Round steel pipe(1) The inside side's of being provided with aluminium-alloy pipe(3), round steel pipe(1)With square aluminium-alloy pipe(3)Between be filled with regeneration concrete, square aluminium-alloy pipe (3)It is interior to be filled with ultra-high performance concrete;The square aluminium-alloy pipe(3)On inner wall multigroup put more energy into is provided in levels are stacked Rib(5);Round steel pipe(1)Screw thread is provided on inner wall;
The preparation method of above-mentioned regeneration concrete coupled column includes the following steps:
1), according to construction requirement, by square aluminium-alloy pipe(3)The bottom surface length of side and round steel pipe(1)Diameter 0.4 ratio;Selection The round steel pipe of certain diameter(1)With the square aluminium-alloy pipe of go-no-go(3), and in square aluminium-alloy pipe(3)It is in levels on inner wall It is stacked to be provided with multigroup ribbed stiffener(5), to enhance the bearing capacity and ductility of the coupled column;Round steel pipe(1)It is threaded on inner wall; To increase intensity when pouring;
2), by square aluminium-alloy pipe(3)It lifts the extremely position of installation and carries out perpendicularity correction and test, with guarantor's aluminium-alloy pipe(3)It hangs down It is straight to place, avoid the occurrence of inclination;Pass through engineering control network total powerstation positioning side aluminium-alloy pipe again(3)Central point;
3), foundation side's aluminium-alloy pipe(3)Central point;Round steel pipe is lifted according to a conventional method(1), and ensure round steel pipe(1)With side Aluminium-alloy pipe(3)Concentricity;Again in square aluminium-alloy pipe(3)Bottom periphery round steel pipe(1)Annular space in pour 40cm thickness Regeneration concrete so that round steel pipe(1)With square aluminium-alloy pipe(3)It is cohered with pedestal fixation;
4), round steel pipe(1)With square aluminium-alloy pipe(3)After being cohered with pedestal fixation, in round steel pipe(1)With square aluminium-alloy pipe(3)It Between annular space in and square aluminium-alloy pipe(3)Regeneration concrete and ultra-high performance concrete are inside poured respectively;
5), round steel pipe(1)With square aluminium-alloy pipe(3)Between annular space in regeneration concrete and square aluminium-alloy pipe(3)Interior is super High performance concrete is poured by way of being layered and replacing and pour, and the thickness poured per layer concrete is:1m~2m;
6), pour per layer concrete after, vibrating spear is inserted into natural vertical configuration in poured concrete and is shaken It smashes, the depth that vibrating spear is inserted into concrete layer is 50~100cm, and each vibrating time is 20~30s;The each displacement of vibrating spear For 30~35cm, and keep and round steel pipe(1)Wall and square aluminium-alloy pipe(3)Wall holds the spacing of 50~100mm, to avoid vibrating spear With round steel pipe(1)Wall or square aluminium-alloy pipe(3)Wall collides and causes to damage;
7), the concrete surface that pours when every layer is flat and no longer significantly sinks, bubble-free discharge, stops shaking when starting bleeding It smashes, the purpose vibrated per layer concrete is to ensure that concrete layer is closely knit, to improve the bearing capacity of the coupled column, and prevents Leakage pounds the case where avoiding concrete disintegration;
8), pour per layer concrete after the completion of, it is with spherical surface stick that its surface rolling is more when concrete surface is close to pre-hardening state A convex nest of spherical surface, then be rinsed with water the dirt of concrete surface, clears up the bleeding on surface so that itself and adjacent concrete layer it Between closely knit contact;Increase the linking performance between adjacent layer, next coagulation is poured under the status condition that its surface keeps moistening Soil layer;So cycle, until completing the one-piece casting of regeneration concrete and ultra-high performance concrete;
9), regeneration concrete and ultra-high performance concrete one-piece casting after the completion of, respectively to round steel pipe(1)With square aluminium-alloy pipe (3)Between regeneration concrete and square aluminium-alloy pipe(3)Interior ultra-high performance concrete is conserved, regeneration concrete layer(2) It is conserved using curing film package method of curing, i.e., by the way that curing film package is adhered to regeneration concrete layer(2)Surface with Make regeneration concrete layer(2)It keeps moistening and its surface is avoided to form ponding, curing cycle is 7~9 days;
10), high performance concrete layer is first with 90 DEG C of water to ultra-high performance concrete layer(4)Watering is carried out so that it keeps moistening And its surface is avoided to form ponding, maintenance is conserved after 3~4 days using steam comb according to baking method, that is, is passed through 90 DEG C of steamings Vapour carried out dry heating curing after 4~5 days, obtained, regeneration concrete coupled column finished product.
2. a kind of regeneration concrete coupled column according to claim 1, it is characterised in that:The ultra-high performance concrete It is made of the raw material of following weight parts:
27~38 silicon ash of cement, 8.5~9.5 levigate quartz sand 5~8
39~41 metallic fiber of fine sand, 5.5~8 high efficiency water reducing agent 0.5~1
Water 5.5~8
It is added after being weighed cement, silicon ash, levigate quartz sand, fine sand, metallic fiber, high efficiency water reducing agent by above-mentioned parts by weight To being stirred in blender, after being uniformly mixed, after adding water to continue stirring 2 minutes, obtain, ultra-high performance concrete.
3. a kind of regeneration concrete coupled column according to claim 2, it is characterised in that:The metallic fiber is by steel fibre Peacekeeping amorphous alloy fiber weight ratio is 6:5 are constituted.
4. a kind of regeneration concrete coupled column according to claim 1, it is characterised in that:The regeneration concrete is under The raw material for stating parts by weight is made:
40~45 water 15~20 of ultra-high performance concrete
15~20 recycled fine aggregate 18~25 of regenerated coarse aggregate
The preparation of regeneration concrete includes the following steps:
1), weigh ultra-high performance concrete and water by above-mentioned mass parts, and the two is stirred to be uniformly mixed, slurries is made, , cement mortar;It is spare;
2), by above-mentioned mass parts weigh regenerated coarse aggregate and recycled fine aggregate respectively, then by regenerated coarse aggregate and regenerate thin bone Material is separately immersed in a concentration of 5% sodium silicate solution, drips regenerated coarse aggregate and recycled fine aggregate respectively after impregnating 1 hour Go out;
3), the regenerated coarse aggregate of bleeding is uniformly immersed in part of cement slurry, the quality between regenerated coarse aggregate and cement mortar Than being 7:3, immersion drains after ten minutes, and is obtained, regenerated coarse aggregate premix after dry 15 minutes under the conditions of 75 DEG C;
4), the recycled fine aggregate of bleeding is uniformly immersed in remaining cement mortar, the matter between recycled fine aggregate and cement mortar Amount is than being 1:1, immersion drains after ten minutes, and is obtained, recycled fine aggregate premix after dry 15 minutes under the conditions of 75 DEG C;
5), finally above-mentioned regenerated coarse aggregate premix and recycled fine aggregate premix are mixed evenly after, obtain, regenerate coagulation Soil.
5. a kind of regeneration concrete coupled column according to claim 4, it is characterised in that:The regenerated coarse aggregate and again Raw fine aggregate is made of discarded concrete through crushing grinding respectively;
The preparation method of the regenerated coarse aggregate is:
The impurity such as glass, plastics and reinforcing bar in discarded concrete are removed first, with crusher by discarded concrete crushing grinding The regenerated coarse aggregate that grain size is 5~25 mm is filtered out by 25 apertures mm afterwards, regenerated coarse aggregate is then rinsed with water, in nature Under the conditions of dried;, regenerated coarse aggregate;
The preparation method of the recycled fine aggregate is:
Above-mentioned partial regeneration coarse aggregate is carried out to filter out the regeneration that grain size is 5~10 mm by 10 apertures mm after being crushed again Fine aggregate is then rinsed with water recycled fine aggregate, is dried under field conditions (factors);, recycled fine aggregate.
6. a kind of regeneration concrete coupled column according to claim 1, it is characterised in that:The ribbed stiffener(5)For square Shape plate, ribbed stiffener(5)Around square aluminium-alloy pipe(3)It is uniformly distributed on inner wall, adjacent ribbed stiffener in circumferential direction(5)Between angle be 45 Degree or 90 degree.
7. a kind of regeneration concrete coupled column according to claim 6, it is characterised in that:The ribbed stiffener(5)Length Side and square aluminium-alloy pipe(3)The bottom surface length of side ratio be 0.3~0.5.
8. a kind of regeneration concrete coupled column according to claim 7, it is characterised in that:The ribbed stiffener(5)It is short Side and square aluminium-alloy pipe(3)Height ratio be not less than 0.11.
9. a kind of regeneration concrete coupled column according to claim 4, it is characterised in that:The regeneration concrete is under The raw material for stating parts by weight is made:
42~44 water 17~19 of ultra-high performance concrete
17~19 recycled fine aggregate 19~22 of regenerated coarse aggregate.
10. a kind of regeneration concrete coupled column according to claim 9, it is characterised in that:The regeneration concrete by The raw material of following weight parts is made:
43.4 water 18.6 of ultra-high performance concrete
18 recycled fine aggregate 20 of regenerated coarse aggregate.
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