CN114800769A - Manufacturing method of prefabricated honeycomb-shaped steel partially-wrapped recycled concrete column - Google Patents
Manufacturing method of prefabricated honeycomb-shaped steel partially-wrapped recycled concrete column Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 149
- 239000010959 steel Substances 0.000 title claims abstract description 149
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000002787 reinforcement Effects 0.000 claims abstract description 19
- 238000003466 welding Methods 0.000 claims description 21
- 238000005520 cutting process Methods 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 12
- 238000005452 bending Methods 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000009417 prefabrication Methods 0.000 abstract 1
- 239000002699 waste material Substances 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009430 construction management Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/04—Producing shaped prefabricated articles from the material by tamping or ramming
- B28B1/045—Producing shaped prefabricated articles from the material by tamping or ramming combined with vibrating or jolting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
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Abstract
The invention relates to a method for manufacturing a prefabricated honeycomb-shaped steel partially-wrapped recycled concrete column, which is characterized by comprising the following steps of: the method comprises the following steps: a. manufacturing honeycomb steel, b, manufacturing and installing a steel reinforcement framework, c, manufacturing recycled concrete, d, pouring the recycled concrete, and e, disassembling a template; by adopting the technical scheme, the recycled concrete can be effectively utilized, and the method is low-carbon and environment-friendly; the bending rigidity of the column body is greatly improved, the bearing capacity of the component is effectively improved, and the corrosion/fire resistance performance is better; in addition, the occlusion force between the section steel and the recycled concrete in the honeycomb section steel part-wrapped recycled concrete column is greatly enhanced, the single-side one-step pouring can be performed during the prefabrication and pouring, the use of templates is greatly reduced, the construction is simple, and the construction time is greatly shortened.
Description
Technical Field
The invention relates to the field of building structures, in particular to a method for manufacturing a prefabricated honeycomb section steel partially-wrapped recycled concrete column.
Background
China is the largest world consuming sandstone. At present, the total consumption of the sandstone aggregate in China exceeds 178 hundred million tons. The huge demand for sandstone aggregate has led to the problem of aggregate shortage in many places in China. Meanwhile, a large amount of construction waste is generated due to old city reconstruction, natural disasters and the like every year, so that a series of social and environmental problems are caused. The recycled concrete is a new concrete prepared by crushing, cleaning and grading waste concrete blocks, then forming recycled coarse aggregate according to a certain proportion and gradation, and partially or completely replacing natural sandstone with the recycled coarse aggregate. The recycled concrete changes the construction waste into valuable, replaces natural aggregate to be applied in engineering, can generate obvious social and environmental benefits, and is one of effective means for solving the problems of natural aggregate shortage and construction waste pollution environment.
In recent years, with the successive promulgation of documents such as a plurality of opinions about further strengthening urban standard construction management work of the common central national institute and the compendium of modern development of building industry, the assembly type building is vigorously popularized and used in the engineering of China. Under the trigger, the construction that the section steel part wraps the concrete column (PEC column for short) is convenient, and the combined member form which can be prefabricated in factories and assembled on site is rapidly popularized and applied in the engineering of China. However, because the surface of the section steel is smooth, under the consideration of the influence of long-term factors such as concrete shrinkage and creep, environmental erosion and the like, how to guarantee the PEC column interface performance is a key issue to be paid attention to in such members. Furthermore, since the size of the hot rolled steel is relatively fixed for the PEC column, this limits the flexibility of selection of the cross-sectional dimensions of the PEC column to a certain extent.
The honeycomb section steel is hollow section steel formed by cutting an H-shaped steel or I-shaped steel web plate according to a certain arc line or a broken line and performing staggered welding. Compared with the original solid web section steel, the section rigidity and the bending resistance bearing capacity of the honeycomb section steel are effectively improved, and the honeycomb section steel can be expanded according to the designed expansion ratio, so that the section size is selected more flexibly. At present, the honeycomb steel is widely applied to engineering, such as super high-rise structures of Tianjin international square, and administrative buildings of banks developed by Yunnan province. However, the honeycomb-shaped steel is easy to be partially bent around the holes due to the holes on the web plate; the hole area is also prone to over-fire, thereby reducing its refractory limit. How to prevent the honeycomb steel from locally buckling and improve the fire resistance of the honeycomb steel is a key issue of attention of the members.
Aiming at the key problems of how to make up the performance defect of the recycled concrete, how to ensure the interface performance of the PEC column, how to prevent the honeycomb steel from local buckling and improve the fire resistance of the PEC column and the like under the background, the invention innovatively provides a novel prefabricated combined member form that the recycled concrete is filled in the outline range of the honeycomb steel, and longitudinal bars, stirrups, tie bars and other parts are selected and arranged according to the performance requirements, so that the honeycomb steel partially wraps the recycled concrete column.
The honeycomb-shaped steel is partially wrapped by the recycled concrete column, so that the advantages of green and environment-friendly fused recycled concrete, high bending rigidity of the honeycomb-shaped steel, convenience in PEC column construction and the like are achieved, and the performance defects that the recycled concrete is poor in mechanical property, the honeycomb-shaped steel is easy to bend, the PEC column interface performance is not easy to guarantee under long-term action and the like can be overcome. Therefore, the novel prefabricated combined column has wide engineering application prospect.
Disclosure of Invention
The invention aims to provide a method for manufacturing a partially-wrapped concrete column by prefabricated honeycomb steel, and aims to solve the key problems of how to make up the performance defect of recycled concrete, how to ensure the interface performance of a PEC column, how to prevent local buckling of the honeycomb steel and the like.
The invention is realized by the following steps: a method for manufacturing a prefabricated honeycomb steel part-wrapped concrete column comprises the following steps:
a. manufacturing the honeycomb section steel: the honeycomb section steel comprises a web plate and flanges, a plurality of circular through holes are formed in the web plate, the circular through holes are sequentially arranged to form honeycomb holes, the flanges are arranged at the upper end and the lower end of the web plate, and tie bars are welded between the flanges at the upper end and the lower end of the web plate; the manufacturing method of the honeycomb section steel comprises the following steps:
s1, web cutting: taking I-steel or H-shaped steel, cutting the web plate of the I-steel or H-shaped steel according to a preset arc line by using a numerical control multi-head automatic cutting machine, and then staggering and cooling the cut web plate.
s2, web welding: staggering and aligning the semicircular groove on the upper half part of the web plate and the semicircular groove on the lower half part of the web plate after cutting to form a circular through hole, fixing by spot welding, bottoming by carbon dioxide gas shielded welding, manually welding a cover surface, overturning a component after welding one surface, and flatly welding the back surface to obtain the honeycomb steel;
b. manufacturing and installing a steel reinforcement framework: the method comprises the following steps that rectangular stirrups penetrate through circular through holes in a web plate, the number of the stirrups penetrating through each circular through hole is 1, longitudinal reinforcements penetrate into the rectangular stirrups after the stirrups are arranged, iron wires are used for binding and fixing the longitudinal reinforcements on the stirrups, the longitudinal reinforcements are distributed on two side faces of the web plate, and the number of the longitudinal reinforcements on each side face of the web plate is 2-3;
c. installing a template: welding flat steel, namely a tie bar, on the honeycomb-shaped steel to reinforce the honeycomb-shaped steel, then placing the flange of the honeycomb-shaped steel perpendicular to the ground, binding a bottom die, and binding side dies at two ends of the honeycomb-shaped steel;
d. preparing recycled concrete: according to the design strength and the mixing proportion of the recycled concrete, firstly stirring 70% of water, cement and sand for 1min, and then putting the rest water and recycled aggregate into the mixer for 2 min;
e. pouring recycled concrete: pouring the recycled concrete prepared in the step d into the outline range of the honeycomb steel, pouring the recycled concrete from the hole to the bottom surface, and vibrating to compact; curing for 28 days after pouring is finished;
f. and (3) disassembling the template: and pouring and molding the regenerated concrete, curing for a period of time, when the strength meets a certain requirement, dismantling the template, curing the side mold for 7 days, dismantling the bottom mold after curing for 28 days, and dismantling the template to obtain the prefabricated honeycomb steel partially-wrapped regenerated concrete column.
The further technical scheme of the invention is as follows: and e, partially coating and combining the recycled concrete and the honeycomb-shaped steel, and pouring the recycled concrete only in the outline range of the honeycomb-shaped steel.
The further technical scheme of the invention is as follows: the honeycomb web consists of an upper half part and a lower half part, the upper half part and the lower half part of the web are mutually symmetrical, and the upper half part and the lower half part of the web are welded and connected together to form the honeycomb web.
The further technical scheme of the invention is as follows: a plurality of semicircular grooves are formed in the upper half portion and the lower half portion of the web respectively, the semicircular grooves are arranged in sequence, the upper half portion of the web is spliced with the lower half portion to form the honeycomb web, a plurality of circular through holes are formed in the one-to-one correspondence of the semicircular grooves in the upper half portion and the lower half portion of the honeycomb web, and the circular through holes are arranged in sequence to form a honeycomb shape.
The further technical scheme of the invention is as follows: the concrete coated in the outline range of the honeycomb section steel is recycled concrete made of recycled aggregate
The further technical scheme of the invention is as follows: and filling the recycled concrete in the outline range of the honeycomb-shaped steel, and selectively arranging longitudinal bars, stirrups, tie bars and other parts according to performance requirements to form a novel combined member form that the honeycomb-shaped steel partially wraps the recycled concrete column.
The further technical scheme of the invention is as follows: the original solid-web section steel is adopted in the manufacturing process of the honeycomb steel, the height of the section of the original solid-web section steel is 200mm, the original solid-web section steel is expanded according to the expansion ratio of 1.4, the clear distance between circular holes after the expansion is 82.5mm, and the radius of the circular holes is 90 mm.
The further technical scheme of the invention is as follows: in the step b, stirrups in the steel reinforcement framework directly penetrate through the holes, the size of the outer contour of each stirrup is 90mm multiplied by 180mm, and the distance between the stirrups is 262 mm.
The further technical scheme of the invention is as follows: in step c, the distance between the welded flat steels is 100 mm.
The further technical scheme of the invention is as follows: and e, directly flowing the recycled concrete from the hole to the bottom surface of the member, and vibrating to compact.
The invention has the beneficial effects that: by adopting the technical scheme, the manufactured honeycomb steel is partially wrapped by the recycled concrete column, so that the recycled concrete can be effectively utilized, and the method is an effective means for solving the problems of natural aggregate shortage and construction waste; the cross section of the honeycomb-shaped steel is expanded, so that the bending rigidity and the bearing capacity of the member are effectively improved, and meanwhile, a large amount of steel can be saved due to the web plate with the circular through holes; compared with a solid-web steel concrete structure, the connection of the honeycomb steel partially wrapped recycled concrete column is more convenient, and the construction on site is more facilitated; the existence of the recycled concrete can effectively improve the fireproof and anticorrosive performances of the honeycomb steel and can effectively inhibit the local buckling of the honeycomb steel component; in addition, due to the existence of the circular through holes, the occluding force between the section steel partially wrapping the recycled concrete column by the honeycomb section steel and the recycled concrete is greatly enhanced, the use of section steel studs is reduced, and the obvious economic benefit is achieved; meanwhile, the circular through holes can be used for prefabricating and pouring, so that the pouring process of the recycled concrete is completed at one time, secondary overturning and pouring are not needed, the construction process is simplified, and the construction time is shortened.
Drawings
FIG. 1 is a schematic structural view of a column of honeycomb steel partially wrapped with recycled concrete according to the present invention;
FIG. 2 is a schematic view of the layout on a sheet material as the upper and lower halves of the web are cut;
FIG. 3 is a schematic structural view of the web according to example 2.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
Example 1:
a manufacturing method of a prefabricated honeycomb steel partially-wrapped recycled concrete column comprises the following steps:
a. manufacturing the honeycomb section steel: the honeycomb-shaped steel comprises a web plate 1 and flanges 2, a plurality of circular through holes 3 are formed in the web plate, the circular through holes are sequentially arranged to form honeycomb holes, the flanges are arranged at the upper end and the lower end of the web plate, and tie bars 4 are welded between the flanges at the upper end and the lower end of the web plate; the manufacturing method of the honeycomb section steel comprises the following steps:
s1, web cutting: taking I-steel or H-shaped steel, cutting the web plate of the I-steel or H-shaped steel by using a numerical control multi-head automatic cutting machine according to a preset arc line in a cutting mode according to the arrangement mode shown in figure 2, and then staggering and cooling the cut web plate.
s2, web welding: the semicircular groove of the upper half part of the web and the semicircular groove of the lower half part of the web are staggered and aligned to form a circular through hole after cutting, spot welding is performed for fixation, then backing is performed through carbon dioxide gas shielded welding, the cover surface is welded manually, the component is overturned after the one surface is welded, the back surface of the component is placed and welded flatly, and therefore the honeycomb steel is obtained.
b. Manufacturing and installing a steel reinforcement framework: the method comprises the following steps that (1) rectangular stirrups 5 penetrate through circular through holes in a web plate, the number of the stirrups penetrating through each circular through hole is 1, longitudinal reinforcements 6 penetrate into the rectangular stirrups after the stirrups are arranged, the longitudinal reinforcements are bound and fixed on the stirrups by using iron wires, the longitudinal reinforcements are distributed on two side faces of the web plate, and the number of the longitudinal reinforcements on each side face of the web plate is 2-3;
c. installing a template: welding flat steel, namely a tie bar, on the honeycomb-shaped steel to reinforce the honeycomb-shaped steel, then placing the flange of the honeycomb-shaped steel perpendicular to the ground, binding a bottom die, and binding side dies at two ends of the honeycomb-shaped steel;
d. preparing recycled concrete: according to the design strength and the mixing proportion of the recycled concrete, firstly stirring 70% of water, cement and sand for 1min, and then putting the rest water and recycled aggregate into the mixer for 2 min;
e. pouring recycled concrete: pouring the recycled concrete 7 manufactured in the step d into the outline range of the honeycomb steel, pouring the recycled concrete from the hole to the bottom surface, and vibrating to compact; and curing for 28 days after pouring.
f. And (3) disassembling the template: and pouring and molding the regenerated concrete, curing for a period of time, when the strength meets a certain requirement, dismantling the template, curing the side mold for 7 days, dismantling the bottom mold after curing for 28 days, and dismantling the template to obtain the prefabricated honeycomb steel partially-wrapped regenerated concrete column.
The concrete column manufactured according to the technical scheme is shown in figure 1.
Preferably, the original solid-web section steel is adopted in the manufacturing process of the honeycomb section steel, and the original solid-web section steel is H-shaped steel, so that the bending performance of the column body in the strong axis direction and the weak axis direction can be guaranteed.
Preferably, first half of web and lower half are opened respectively has a plurality of semicircular grooves, and the semicircular groove is arranged in proper order, and first half of web forms the honeycomb web with the lower half concatenation back of staggering, and first half of honeycomb web and the semicircular groove one-to-one on the lower half form a plurality of circular through-holes, and circular through-hole is arranged in proper order and is cellular, can promote the snap-in force of recycled concrete and shaped steel.
Preferably, the web is 8mm thick, with the optimum thickness selected for good performance, and excessive thickness of the sheet can result in excessive cost and insufficient thickness can affect the load carrying capacity of the column.
Preferably, the recycled concrete wrapped outside the honeycomb steel is fully recycled concrete made of fully recycled aggregate, so that the building waste can be fully utilized, and the method is green and environment-friendly.
Preferably, the height of the section of the original solid section steel is 200mm, the clear distance between the honeycomb holes is 82.5mm, and the radius of the circular holes is 90 mm. At this time, the expansion ratio of the section of the member is 1.4, the mechanical property of the honeycomb-shaped steel can be fully exerted, and the manufacturing cost is saved.
Preferably, in the step b, the stirrups in the steel reinforcement framework directly pass through the holes, the size of the outer contour of each stirrup is 90mm multiplied by 180mm, and the distance between the stirrups is 262 mm.
Preferably, in step c, the distance between the welded flat steels is 100 mm.
Example 2:
this example is substantially the same as example 1, except that: as shown in fig. 3, honeycomb shaped steel is formed by the welding of edge of a wing and honeycomb web, wherein the edge of a wing size is selected according to actual need in a flexible way, the honeycomb web is the web that the polylith was arranged in proper order, the tip mutual welded fastening of every web and web, the web adopts the mode of polylith concatenation, when carrying out the web and tailor, can make full use of panel, avoid extravagant, simultaneously can choose for use the web of certain quantity to weld according to actual need, for example, choose for use 2 or polylith webs to splice the back welding firmly each other, the length of web just can be adjusted according to actual need in a flexible way, edge of a wing width also can choose for use in a flexible way with length according to actual need, make honeycomb shaped steel cross sectional dimension select more in a flexible way.
Example 3:
this example is substantially the same as example 1, except that: the concrete partially wrapped by the honeycomb steel is recycled concrete prepared by partially replacing natural aggregates with recycled aggregates, so that the mechanical property of the concrete is improved compared with the fully recycled concrete due to the existence of the natural aggregates, and the construction waste can be changed into valuable materials by partially replacing the natural aggregates with the recycled aggregates compared with the common concrete, thereby bringing certain social benefits and environmental benefits.
Example 4:
this example is substantially the same as example 1, except that: the tie bar of honeycomb shaped steel part parcel recycled concrete post adopts the reinforcing bar to connect, adopts the reinforcing bar as the tie bar for the cutting of tie bar is comparatively convenient, and the site operation is comparatively convenient, and the reinforcing bar tie bar also can produce good constraint effect to its inside recycled concrete simultaneously, thereby promotes the mechanical properties of cylinder.
In addition to the above, experimental research shows that, compared with a honeycomb steel column, the ultimate bearing capacities of a common concrete column wrapped by honeycomb section steel, a recycled concrete column wrapped by honeycomb section steel with a 50% substitution rate and a fully recycled concrete column wrapped by honeycomb section steel are respectively improved by 25%, 24% and 20%, which indicates that the mechanical property of the honeycomb steel column can be effectively improved by filling concrete in the profile range of the honeycomb section steel, and for the recycled concrete column wrapped by the honeycomb section steel, the influence of different substitution rates is not very large, which indicates that the honeycomb section steel can effectively inhibit the performance defect of the recycled concrete. In addition, for the recycled concrete column partially wrapped by the honeycomb-shaped steel, before yield load, the axial strain of the recycled concrete column is far smaller than that of the honeycomb steel column, and when the recycled concrete column is damaged, the ductility coefficient of the recycled concrete column partially wrapped by the honeycomb-shaped steel reaches 3.04-4.42, so that good deformation performance is shown. In conclusion, the honeycomb-shaped steel partially-wrapped recycled concrete column provided by the invention has good mechanical properties and can be popularized and used in actual engineering.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for manufacturing a prefabricated honeycomb-shaped steel partially-wrapped recycled concrete column is characterized by comprising the following steps of: the method comprises the following steps:
a. manufacturing the honeycomb section steel: the honeycomb-shaped steel comprises a web and flanges, a plurality of circular through holes are formed in the web, the circular through holes are sequentially arranged to form honeycomb holes, the flanges are arranged at the upper end and the lower end of the web, and tie bars are welded between the flanges at the upper end and the lower end of the web; the manufacturing method of the honeycomb section steel comprises the following steps:
s1, web cutting: taking I-steel or H-shaped steel, cutting the web plate of the I-steel or H-shaped steel according to a preset arc line by using a numerical control multi-head automatic cutting machine or a flame cutting machine, and then staggering and cooling the cut web plate.
s2, web welding: staggering and aligning the semicircular groove of the upper half part of the web plate and the semicircular groove of the lower half part of the web plate after cutting to form a circular through hole, fixing by spot welding, bottoming by gas shielded welding, manually welding a cover surface, and turning and welding the other surface after welding one surface to obtain the honeycomb-shaped steel;
b. manufacturing and installing a steel reinforcement framework: the method comprises the following steps that rectangular stirrups penetrate through circular through holes in a web plate, the number of the stirrups penetrating through each circular through hole is 1, longitudinal reinforcements penetrate into the rectangular stirrups after the stirrups are arranged, iron wires are used for binding and fixing the longitudinal reinforcements on the stirrups, the longitudinal reinforcements are distributed on two side faces of the web plate, and the number of the longitudinal reinforcements on each side face of the web plate is 2-3;
c. installing a template: welding flat steel, namely a tie bar, on the honeycomb-shaped steel to reinforce the honeycomb-shaped steel, then placing the flange of the honeycomb-shaped steel perpendicular to the ground, binding a bottom die, and binding side dies at two ends of the honeycomb-shaped steel;
d. preparing recycled concrete: according to the design strength and the mixing proportion of the recycled concrete, firstly stirring 70% of water, cement and sand for 1min, and then putting the rest water and recycled aggregate into the mixer for 2 min;
e. pouring recycled concrete: pouring the recycled concrete prepared in the step d into the outline range of the honeycomb steel, pouring the recycled concrete from the hole to the bottom surface, and vibrating to compact; curing for 28 days after pouring is finished;
f. and (3) disassembling the template: and pouring and molding the regenerated concrete, curing for a period of time, when the strength meets a certain requirement, dismantling the template, curing the side mold for 7 days, dismantling the bottom mold after curing for 28 days, and dismantling the template to obtain the prefabricated honeycomb steel partially-wrapped regenerated concrete column.
2. The method for manufacturing the prefabricated honeycomb steel section-wrapped recycled concrete column according to claim 1, is characterized in that: and e, partially coating and combining the recycled concrete and the honeycomb-shaped steel, and pouring the recycled concrete only in the outline range of the honeycomb-shaped steel.
3. The method for manufacturing the prefabricated honeycomb steel section-wrapped recycled concrete column according to claim 1, is characterized in that: the honeycomb web is composed of an upper half part and a lower half part, the upper half part and the lower half part of the web are mutually symmetrical, and the upper half part and the lower half part of the web are welded and connected together to form the honeycomb web.
4. The method for manufacturing the prefabricated honeycomb steel section-wrapped recycled concrete column according to claim 1, is characterized in that: a plurality of semicircular grooves are formed in the upper half portion and the lower half portion of the web respectively, the semicircular grooves are arranged in sequence, the upper half portion of the web is spliced with the lower half portion to form the honeycomb web, a plurality of circular through holes are formed in the one-to-one correspondence of the semicircular grooves in the upper half portion and the lower half portion of the honeycomb web, and the circular through holes are arranged in sequence to form a honeycomb shape.
5. The method for manufacturing the prefabricated honeycomb steel section-wrapped recycled concrete column according to claim 1, is characterized in that: the concrete coated in the outline range of the honeycomb section steel is recycled concrete made of recycled aggregate.
6. The method for manufacturing the prefabricated honeycomb steel section-wrapped recycled concrete column according to claim 2, is characterized in that: and filling the recycled concrete in the outline range of the honeycomb-shaped steel, and selectively arranging longitudinal bars, stirrups, tie bars and other parts according to performance requirements to form a novel combined member form that the honeycomb-shaped steel partially wraps the recycled concrete column.
7. The method for manufacturing the prefabricated honeycomb steel section-wrapped recycled concrete column according to claim 1, is characterized in that: the original solid-web section steel is adopted in the manufacturing process of the honeycomb section steel, the section height of the original solid-web section steel is 200mm, the original solid-web section steel is expanded according to the expansion ratio of 1.4, the clear distance between holes after the expansion is 82.5mm, and the radius of a circular hole is 90 mm.
8. The method for manufacturing the prefabricated honeycomb steel section-wrapped recycled concrete column according to claim 1, is characterized in that: in the step b, stirrups in the steel reinforcement framework directly penetrate through the holes, the size of the outer contour of each stirrup is 90mm multiplied by 180mm, and the distance between the stirrups is 262 mm.
9. The method for manufacturing the column made of the prefabricated honeycomb-shaped steel partially-wrapped recycled concrete according to claim 1, is characterized in that: in step c, the distance between the welded flat steels is 100 mm.
10. The method for manufacturing the prefabricated honeycomb steel section-wrapped recycled concrete column according to claim 1, is characterized in that: and e, directly flowing the recycled concrete from the hole to the bottom surface of the member, and vibrating the recycled concrete to be compact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210387599.3A CN114800769A (en) | 2022-04-13 | 2022-04-13 | Manufacturing method of prefabricated honeycomb-shaped steel partially-wrapped recycled concrete column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210387599.3A CN114800769A (en) | 2022-04-13 | 2022-04-13 | Manufacturing method of prefabricated honeycomb-shaped steel partially-wrapped recycled concrete column |
Publications (1)
| Publication Number | Publication Date |
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| CN114961327A (en) * | 2022-07-15 | 2022-08-30 | 山东大学 | H-shaped steel beam reinforcing system and method |
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