CN102182309A - Construction method of steel reinforced concrete beam of large metallurgical industry plant - Google Patents
Construction method of steel reinforced concrete beam of large metallurgical industry plant Download PDFInfo
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- CN102182309A CN102182309A CN 201110068879 CN201110068879A CN102182309A CN 102182309 A CN102182309 A CN 102182309A CN 201110068879 CN201110068879 CN 201110068879 CN 201110068879 A CN201110068879 A CN 201110068879A CN 102182309 A CN102182309 A CN 102182309A
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Abstract
The invention discloses a construction method of a steel reinforced concrete beam of a large metallurgical industry plant, and belongs to the technical field of plant building construction production. The provided construction method of the steel reinforced concrete beam of the large metallurgical industry plant can ensure the manufacturing quality of the steel reinforced concrete beam. The construction method comprises the following steps of: arranging a steel skeleton, and adjusting the installation quality of a steel reinforced post by adjusting a shim plate and a wind cable; arranging a concrete steel rib outside the steel skeleton in an order of arranging the outer side of the steel reinforced post, arranging the outer side of the steel reinforced beam and finally arranging a concrete steel rib at the joint of the steel reinforced post and the steel reinforced beam; supporting a concrete cast template of the steel skeleton, and casting concrete inside and outside a steel reinforced post box body; finally, casting concrete on the steel reinforced beam by adopting a single-side feeding vibrating and single-side driving casting method, a two-side symmetrical layered feeding vibrating casting method and a middle feeding symmetrical driving vibrating casting method; and detaching the cast template after the strength of the concrete meets the design requirement, and curing the concrete.
Description
Technical field
The present invention relates to a kind of job practices of steel framed concrete beam, especially relate to a kind of job practices of large-scale metallurgical industrial premises steel framed concrete beam, belong to factory building construction production technical field.
Background technology
The steel reinforced concrete frame construction is a kind of novel building structure that grows up after steel work and concrete structure, it combines the advantage of steel work and concrete structure, compare with steel work, steel reinforced concrete structure can improve the whole and local yield behavior of steel work, increases the rigidity of structure and damping, saving steel, antirust, anti-corrosive; Compare with concrete structure, in bury the bearing capacity that steel frame can improve structure, reduce the sectional dimension of member and increase the building usable floor area, strengthen shear behavior and anti-bending strength.
At present, the steel reinforced concrete that in civil building engineering, uses, it as application number the steel reinforced concrete that relates in 00106161.5 " steel structure, steel skeleton reinforced concrete job practices ", what its job practices adopted is prefabricated steel framed concrete beam in factory, and then the scene of transporting to installs, and the shortcoming of this method is that transport difficulty is big, the cost of transportation height, install again after prefabricated, also can cause the weight of steel framed concrete beam to greatly increase, bring great difficulty to installation.Also have and carry out cast-in-place job practices at the scene, as application number is the steel reinforced concrete that relates in 01100519.X " job practices of Steel-frame building thing concrete beam and floor and hang die device ", what its job practices adopted is that steel frame beam is installed earlier, arrange stirrup in the steel frame beam outside then, install template, concreting more at last, the concrete that this job practices relates to, the one, have only steel frame beam, do not have reinforced concrete column, do not have the construction problem at steel frame beam and reinforced concrete column node place, the 2nd, have only stirrup in the concrete, the vertical applied force reinforcing bar is replaced by steel frame beam, and the construction quality during last placing of concrete can be guaranteed.
And at factory building, in the construction in the room, large-scale metallurgical industry reinforcing bar concrete plant of especially under large-scale, high temperature, fully loaded transportation condition, working, steel framed concrete beam is not only arranged, also has combined steel and concrete column, and the form of the steel frame beam of inside concrete and reinforced concrete column junction is complicated especially, and the installation accuracy of the steel frame that is made of reinforced concrete column and steel frame beam requires high especially; In addition, except in concrete, being embedded with steel frame, in the concrete in the steel frame outside, also be embedded with the intensive concrete reinforcement that constitutes by peg, steel bar stress and crosswise fixed stirrup, so just give the layout of concrete reinforcement, particularly many problems have been brought in the layout of junction concrete reinforcement, can't guarantee the layout quality of steel frame outside concrete reinforcement, just reduce the total quality of steel reinforced concrete after building.Add, increased concrete reinforcement in the steel frame outside, concrete cast is also difficult, difficulty of construction is bigger, the pouring quality of steel reinforced concrete can not get good assurance, and because the liner of steel framed concrete beam is the structure that H type steel frame beam adds concrete reinforcement, when building, just be difficult to guarantee concrete pouring quality more, although so the steel reinforced concrete frame construction especially the large-scale metallurgical industrial premises compared aforesaid plurality of advantages with the steel reinforced concrete frame construction with concrete structure with steel work, but also because there are above-mentioned many technical barriers in steel reinforced concrete on structure and technology, in the existing building engineering, can not access promotion and application widely, especially large-scale, high temperature, never be used especially in the construction of the large-scale metallurgical industrial premises that fully loaded transportation condition is worked down.
Summary of the invention
In order to make this new structure of steel reinforced concrete can be applied to the existing building engineering widely, particularly be applied to large-scale, high temperature, fully loaded transportation condition widely down in the construction project of the large-scale metallurgical industrial premises of work, technical problem to be solved by this invention is: a kind of job practices that can guarantee the large-scale metallurgical industrial premises steel framed concrete beam of steel framed concrete beam fabricating quality is provided.
The technical scheme that adopts for solving the problems of the technologies described above is: the job practices of large-scale metallurgical industrial premises steel framed concrete beam, may further comprise the steps,
A, installation steel frame, earlier previously prepared box reinforced concrete column is installed on the installation basis that is embedded with stone bolt, tentatively fixing with temporary fixed cable wind rope, and adjust verticality, center line and the installation elevation that backing plate and cable wind rope are adjusted reinforced concrete column by being arranged on the installation of installing on the basis; And then previously prepared H type steel frame beam is installed between adjacent two reinforced concrete columns, make the last lower wing plate of H type steel frame beam, align with the inner lateral partitions of installing in box reinforced concrete column corresponding position, and after preliminary fixing, the solid welding of full penetration forms steel frame to reinforced concrete column again;
B, arrange concrete reinforcement on steel frame, arrange the concrete reinforcement in the reinforced concrete column outside earlier, the concrete reinforcement in the steel frame beam outside is arranged in the back, arranges the concrete reinforcement of reinforced concrete column and steel frame beam junction at last;
C, build the reinforced concrete column concrete, install the concreting template in the concrete reinforcement outside of arranging qualified reinforced concrete column earlier, adopt high the throwing to add the casting method that vibrates and build reinforced concrete column casing inner concrete then, adopt the fixed point location casting method that vibrates to build the outer concrete of reinforced concrete column casing;
D, build the steel frame beam concrete, undertaken by following step,
1) install the concreting template in the concrete reinforcement outside of arranging qualified steel frame beam earlier,
2) adopt the one-sided one-sided casting method of driveing that vibrates of feeding intake to build the following concrete of steel frame beam lower wing plate then, it is above to apart from the concrete below the upper flange 150mm to adopt the bilateral symmetry layering to feed intake to vibrate casting method to build lower wing plate, the symmetry that feeds intake in the middle part of adopting is driven the concrete that the casting method that vibrates is built remainder on the steel frame beam, finishes whole concrete on the steel frame beam up to building;
E, form removal, concrete curing are treated to remove formwork for placing again after concrete strength reaches designing requirement, press the code requirement curing concrete.
Further be, adopt one-sided feed intake vibrate one-sided when driveing casting method and building the following concrete of steel frame beam lower wing plate, earlier the concrete that mixes is dropped into the pouring area from a side of steel frame beam, vibrate with vibratory equipment and to drive concrete its opposite side from steel frame beam is extruded above more than the lower wing plate 100mm, change both sides two people's symmetries then into and vibrate, till all extruding from the opposite side of steel frame beam from the new concrete that drops into of the side that feeds intake.
Further be, vibrate casting method when building more than the steel frame beam lower wing plate to the concrete below upper flange 150mm adopting the bilateral symmetry branch to lead to feed intake, every layer of thickness that feeds intake is no more than 300mm, the feeding point dispersed placement when feeding intake, and continuous placing.
Further be, adopt the middle part to feed intake symmetry when driveing the casting method that vibrates and building the concrete of remainder on the steel frame beam, the concrete that mixes drops into the pouring area from the middle part of steel frame beam, the thickness that feeds intake exceeds steel frame beam upper flange 150～200mm, vibrate to the steel frame beam two ends from the centre with the equipment of vibrating then and drive concrete, extend to the end of steel frame beam up to concrete, simultaneously, in the process of vibrating, remain the thickness of the regional inner concrete that vibrates.
Further be, the reinforcing bar that is arranged in the steel frame outside comprises peg, vertical applied force reinforcing bar and crosswise fixed stirrup, undertaken by following step during layout, earlier nail solder is connected on reinforced concrete column and the steel frame beam, and then, arrange prefabricated crosswise fixed stirrup at last again the outside of vertical applied force reinforcement placement to reinforced concrete column and steel frame beam.
Further be, steel frame carried out before external wrapping concrete builds that the external surface to steel frame carries out processing of rust removing earlier, be silver gray up to the external surface of steel frame.
Further be, the maximum particle diameter of stone of concrete that is used for the encased steel skeleton is less than adjacent two vertical applied force bar space, and the concrete slump that mixes is 200 ± 10mm.
The invention has the beneficial effects as follows: by being embedded with on the installation basis of stone bolt earlier, reinforced concrete column and the steel frame beam made in advance are installed, and adjust the installation quality of reinforced concrete column, thereby effectively guaranteed the installation quality of the steel frame that constitutes by reinforced concrete column and the sliding beam of steel in steel reinforced concrete framework early stage by install adjusting backing plate and temporary fixed cable wind rope; And then by the concrete reinforcement of arranging the reinforced concrete column outside earlier, the concrete reinforcement in the steel frame beam outside is arranged in the back, arrange the concrete reinforcement that is disposed in order the steel frame outside of the concrete reinforcement at node place at last, thereby effectively guaranteed the layout quality of concrete steel muscles and bones on combined steel and concrete column and the steel framed concrete beam; Then install the concreting template and build in the reinforced concrete column casing in the reinforced concrete column outside, outer concrete, install the concreting template in the steel frame beam outside more at last, adopt to adopt the one-sided one-sided casting method of driveing that vibrates of feeding intake to build the following concrete of steel frame beam lower wing plate, it is above to apart from the concrete below the upper flange 150mm to adopt the bilateral symmetry layering to feed intake to vibrate casting method to build lower wing plate, the symmetry that feeds intake in the middle part of adopting is driven the concrete that the casting method that vibrates is built remainder on the steel frame beam, treat to remove formwork for placing after the concrete crystallization reaches requirement of strength, curing concrete, by above-mentioned job practices, effectively guaranteed the integral manufacturing quality of combined steel and concrete column and steel framed concrete beam, having solved with combined steel and concrete column and the sliding concrete beam of steel is the steel reinforced concrete framework of main bearing carrier, the problems that in construction, exist, guaranteed the construction quality of combined steel and concrete column and steel framed concrete beam, by described method steel framed concrete beam is constructed, can guarantee with the steel frame to be the physical dimension and the load-bearing requirement of large-scale metallurgical industrial premises structure of foundation construction.Before concreting, to be in place by the steel frame that reinforced concrete column and steel frame beam constitute earlier, arrange concrete reinforcement in the outside of reinforced concrete column and steel frame beam more afterwards, be convenient to the installation of junction steel frame and the layout of junction concrete reinforcement, guaranteed the required precision of construction, the pouring quality that improves steel reinforced concrete for postorder lays the first stone; During concreting, adopt the one-sided one-sided casting method of driveing that vibrates that feeds intake respectively, feed intake casting method and the middle part symmetry that feeds intake of vibrating of bilateral symmetry layering is driven the casting method that vibrates the different portions of steel framed concrete beam is constructed, can effectively improve the pouring quality of concrete beam, thereby make reason owing to the construction technology aspect, do not obtain the factory building steel reinforced concrete framework applied, after having overcome a major defect aspect the above-mentioned construction technology and a difficult problem, obtain promotion and application widely, adopt described job practices simultaneously, can also effectively solve the technical barrier that steel reinforced concrete brings to construction technology on the structure, make the steel reinforced concrete framework large-scale, high temperature, applied in the metallurgical industry Industrial Plant that fully loaded transportation condition is worked down.
Description of drawings
Fig. 1 is the structural representation of the factory building steel reinforced concrete framework that the present invention relates to;
Fig. 2 is the 1-1 sectional view of Fig. 1 of the present invention;
Fig. 3 is the 2-2 sectional view of Fig. 1 of the present invention;
Fig. 4 is the 3-3 sectional view of Fig. 1 of the present invention;
Fig. 5 is the reinforced concrete column and the steel frame beam node schematic diagram of the steel reinforced concrete framework that the present invention relates to;
Fig. 6 is the tentatively fixedly schematic diagram of reinforced concrete column of the present invention.
Be labeled as among the figure: combined steel and concrete column 1, steel framed concrete beam 2, steel frame 3, reinforced concrete column 31, lateral partitions 311, steel frame beam 32, reinforcing bar 4, peg 41, vertical applied force reinforcing bar 42, crosswise fixed stirrup 43, formwork for placing 5, stone bolt 6, reinforcing steel bar connecting sleeve tube 7, cable wind rope 8, adjustment backing plate 9, stirrup pass hole 10.
The specific embodiment
As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6 be the connection diagram of the fitting arrangement of structural representation, steel frame, concrete reinforcement of the factory building steel reinforced concrete framework that relates to of large-scale metallurgical industrial premises steel reinforced concrete beam construction method of the present invention and combined steel and concrete column, steel framed concrete beam.Engaging accompanying drawing below is elaborated to a kind of job practices of the large-scale metallurgical industrial premises steel framed concrete beam of steel framed concrete beam fabricating quality that can guarantee provided by the invention.Job practices of the present invention may further comprise the steps,
A, installation steel frame 3, earlier previously prepared box reinforced concrete column 31 is installed on the installation basis that is embedded with stone bolt 6, tentatively fixing with temporary fixed cable wind rope 8, and adjust verticality, center line and the installation elevation that backing plate 9 and cable wind rope 8 are adjusted reinforced concrete columns 31 by being arranged on the installation of installing on the basis; And then previously prepared H type steel frame beam 32 is installed between adjacent two reinforced concrete columns 31, make the last lower wing plate of H type steel frame beam 32, align with the inner lateral partitions 311 of installing in box reinforced concrete column 31 corresponding positions, and after preliminary fixing, the solid welding of full penetration forms steel frame 3 to reinforced concrete column 31 again;
B, arrange concrete reinforcement 4 on steel frame 3, arrange the concrete reinforcement 4 in reinforced concrete column 31 outsides earlier, the concrete reinforcement 4 in steel frame beam 32 outsides is arranged in the back, arranges the concrete reinforcement 4 of reinforced concrete column 31 and steel frame beam 32 junctions at last;
C, build the reinforced concrete column concrete, arranging that qualified reinforced concrete column 31 concrete reinforcements 4 outsides install concreting template 5 earlier, adopt high the throwing to add the casting method that vibrates and build reinforced concrete column 31 casing inner concretes then, adopt the fixed point location casting method that vibrates to build the outer concrete of reinforced concrete column 31 casings;
D, build the steel frame beam concrete, undertaken by following step,
1) install concreting template 5 in concrete reinforcement 4 outsides of arranging qualified steel frame beam 32 earlier,
2) adopt the one-sided one-sided casting method of driveing that vibrates of feeding intake to build the following concrete of steel frame beam 32 lower wing plates then, it is above to apart from the concrete below the upper flange 150mm to adopt the bilateral symmetry layering to feed intake to vibrate casting method to build lower wing plate, the symmetry that feeds intake in the middle part of adopting is driven the concrete that the casting method that vibrates is built remainder on the steel frame beam 32, finishes whole concrete on the steel frame beam 32 up to building;
E, form removal, concrete curing are treated to remove formwork for placing 5 again after concrete strength reaches designing requirement, press the code requirement curing concrete.
Above-mentioned elder generation is being embedded with on the installation basis of stone bolt 6, reinforced concrete column 31 and the steel frame beam 32 made in advance are installed, and adjust the installation quality of reinforced concrete column 31, thereby effectively guaranteed the installation quality of the steel frame 3 that constitutes by reinforced concrete column 31 and the sliding beam 32 of steel in steel reinforced concrete framework early stage by install adjusting backing plate 9 and temporary fixed cable wind rope 8; And then by the concrete reinforcement 4 of arranging reinforced concrete column 31 outsides earlier, the concrete reinforcement 4 in steel frame beam 32 outsides is arranged in the back, arrange the concrete reinforcement 4 that is disposed in order steel frame 3 outsides of the concrete reinforcement 4 at node place at last, thereby effectively guaranteed the layout quality of concrete steel muscles and bones on the steel frame 3; Then install concreting template 5 and build in reinforced concrete column 31 casings in reinforced concrete column 31 outsides, outer concrete, install concreting template 5 in steel frame beam 32 outsides more at last, adopt the one-sided one-sided casting method of driveing that vibrates of feeding intake to build the following concrete of steel frame beam 32 lower wing plates, it is above to apart from the concrete below the upper flange 150mm to adopt the bilateral symmetry layering to feed intake to vibrate casting method to build lower wing plate, the symmetry that feeds intake in the middle part of adopting is driven the concrete that the casting method that vibrates is built remainder on the steel frame beam 32, treat to remove formwork for placing 5 after the concrete crystallization reaches requirement of strength, curing concrete, by above-mentioned job practices, effectively guaranteed the integral manufacturing quality of combined steel and concrete column 1 and steel framed concrete beam 2, solved with combined steel and concrete column 1 and the sliding concrete beam 2 of steel and be the steel reinforced concrete framework of main bearing carrier, the problems that in construction, exist, guaranteed the construction quality of combined steel and concrete column 1 and steel framed concrete beam 2, by described method steel framed concrete beam 2 is constructed, can guarantee with the steel frame to be the physical dimension and the load-bearing requirement of large-scale metallurgical industrial premises structure of foundation construction.Before concreting, to be in place by the steel frame 3 that reinforced concrete column 31 and steel frame beam 32 constitute earlier, arrange concrete reinforcement 4 in the outside of reinforced concrete column 31 and steel frame beam 32 more afterwards, be convenient to the installation of junction steel frame 3 and the layout of junction concrete reinforcement 4, guaranteed the required precision of construction, the pouring quality that improves steel reinforced concrete for postorder lays the first stone; During concreting, adopt the one-sided one-sided casting method of driveing that vibrates that feeds intake respectively, feed intake casting method and the middle part symmetry that feeds intake of vibrating of bilateral symmetry layering is driven the casting method that vibrates the different portions of steel framed concrete beam 2 is constructed, can effectively improve the pouring quality of concrete beam, thereby make reason owing to the construction technology aspect, do not obtain the factory building steel reinforced concrete framework applied, after having overcome a major defect aspect the above-mentioned construction technology and a difficult problem, obtain promotion and application widely, adopt described job practices simultaneously, can also effectively solve the technical barrier that steel reinforced concrete brings to construction technology on the structure, make the steel reinforced concrete framework large-scale, high temperature, applied in the metallurgical industry Industrial Plant that fully loaded transportation condition is worked down.The welding of full penetration described in the present invention is meant when being welded to steel frame beam 32 on the reinforced concrete column 31 by the end, does not allow lack of penetration, incomplete fusion that exceeds code requirement and the pore that exceeds code requirement, slag inclusion etc. in the weld seam.In order to guarantee the up-to-standard of weld seam, when detecting welding quality, ultrasound examination is carried out in the field joint requirement of on-the-spot reinforced concrete column 31 and steel frame beam 32, reach the requirement of design weldquality.
Because the concrete reinforcement of arranging in steel frame 3 outsides 4 is all very intensive, but the operating space that stays when giving concreting is all less, for the internal soundness that both guarantees that the steel reinforced concrete framework is built, guarantee to build the presentation quality of the steel reinforced concrete framework after finishing again, above-mentioned embodiment, having adopted fixed point location to vibrate when building the concrete in reinforced concrete column 31 outsides builds, the described fixed point location casting method that vibrates may further comprise the steps, the pouring area is also started vibratory equipment in advance earlier vibratory equipment is arranged into reinforced concrete column 31 before placing of concrete around, and then to the even blanking in pouring area, promote vibratory equipment while vibrating, finish whole combined steel and concrete column up to primary concreting.So both can guarantee the pouring quality of combined steel and concrete column, and can make whole combined steel and concrete column not build cold seam in appearance again, and guarantee that the outward appearance of combined steel and concrete column was very attractive in appearance, simultaneously, the concrete work step of building is also minimum, and it is also the highest to build efficient.When adopting the above-mentioned fixed point location method of vibrating to build to survey concrete reinforced concrete column 31 outside, owing to being to arrange vibratory equipment in advance, and be that primary concreting is finished from the bottom up, so when selecting vibratory equipment for use, its length should be complementary with the height with reinforced concrete column.
Because steel frame beam is on having, the H type structure of bottom flange, and the outside also has intensive concrete reinforcement 4, in order to guarantee the pouring quality of concrete beam, so in the above-mentioned embodiment, when building the concrete in steel frame beam 32 outsides, divide three layers to adopt different casting methods to build, be to be first floor below the bottom flange, the bottom flange is above to apart from being the second layer below the upper flange 150mm, remainder is the 3rd layer, adopts the one-sided one-sided casting method of driveing that vibrates that feeds intake respectively, feed intake casting method and the middle part symmetry that feeds intake of vibrating of bilateral symmetry layering is driven the casting method that vibrates and is built.For lacking that the concreting work step that makes steel framed concrete beam 2 is tried one's best, the concrete pouring quality of assurance that can be best again, adopt one-sided feed intake vibrate one-sided when driveing casting method and building the first floor concrete, earlier the concrete that mixes is dropped into the pouring area from a side of steel frame beam 32, vibrate with vibratory equipment and to drive concrete its opposite side from steel frame beam 32 is extruded above more than the lower wing plate 100mm, change both sides two people's symmetries then into and vibrate, till all extruding from the opposite side of steel frame beam 32 from the new concrete that drops into of the side that feeds intake; When adopting the bilateral symmetry layering to feed intake to vibrate casting method to build second layer concrete, every layer of thickness that feeds intake is no more than 300mm, the feeding point dispersed placement when feeding intake, and continuous placing; Drive the casting method that vibrates and build steel frame beam 32 tops when remaining the 3rd layer concrete adopting the middle part symmetry that feeds intake, the concrete that mixes drops into the pouring area from the middle part of steel frame beam 32, the thickness that feeds intake exceeds steel frame beam 32 upper flanges 150～200mm, vibrate to steel frame beam 32 two ends from the centre with the equipment of vibrating then and drive concrete, extend to the end of steel frame beam 32 up to concrete, in the process of vibrating, remain the thickness of the regional inner concrete that vibrates, and try not to surpass the concrete initial setting time off time between each layer.
Because reinforced concrete column 31 is the box post, in order to strengthen the supporting capacity of reinforced concrete column 31, so also built concrete in the casing of box reinforced concrete column 31.In order to guarantee the pouring quality of casing inner concrete, adopted high throwing to add the casting method that vibrates in the above-described embodiment and built.Described high throwing adds the casting method that vibrates and may further comprise the steps, earlier the vibratory equipment that length and reinforced concrete column 31 highly are complementary is put into reinforced concrete column 31 bottom halves and is started vibratory equipment, the high strength micro expansion that will mix does not then have the concrete that contracts and is thrown in the casing from the position that distance concrete drop point height is not less than 2m, and promote vibratory equipment while vibrating being thrown into the concrete while, up to building complete concrete in reinforced concrete column 31 casings.So both can guarantee the pouring quality of steel reinforced concrete framework, and can improve the supporting capacity of whole combined steel and concrete column 1 again.In order to make the concrete in reinforced concrete column 31 lower part box more closely knit, improve supporting capacity, when distance does not have the concrete of contracting greater than the high strength micro expansion of the above position of 2m below building the casing top, the high strength micro expansion that mixes does not have the concrete of contracting, adopt the mode of automobile pumping commercial concrete directly to be thrown in the casing from 31 casees tops of reinforced concrete column, give and form the high pressure of throwing in the casing.
Load bearing requirements according to steel reinforced concrete framework factory building, and for concrete and steel frame can be combined to greatest extent, the reinforcing bar 4 that is arranged in steel frame 3 outsides comprises peg 41, vertical applied force reinforcing bar 42 and crosswise fixed stirrup 43 etc., layout for convenience of these reinforcing bars 4, guarantee the quality requirement of layout, when arranging, earlier peg 41 is welded on reinforced concrete column 31 and the steel frame beam 32, and then vertical applied force reinforcing bar 42 is arranged into the outside of reinforced concrete column 31 and steel frame beam 32, arrange prefabricated crosswise fixed stirrup 43 at last again.In order to make vertical applied force reinforcing bar 42 in the process of building, bigger relatively moving can not occur, so between vertical applied force reinforcing bar 42 and arranged outside crosswise fixed stirrup 43 is arranged, at this moment, when being positioned at reinforced concrete column 31 and steel frame beam 32 node places and need passing the crosswise fixed stirrup 43 of steel frame beam 32 webs for the ease of layout, in structure steel fabrication factory the stirrup on the web of steel frame beam is passed hole 10 processing in advance and bore the type of making, in the erecting bed, frame type crosswise fixed stirrup 43 being divided into 4 L types or two Qian type stirrups passes stirrup and passes hole 10 again, joint welding becomes frame type stirrup in the process of arranging then, joint welding length is not less than 10d, so both can guarantee vertical applied force reinforcing bar 42 relative positions that are arranged in reinforced concrete column 31 outsides, make things convenient for the layout of crosswise fixed stirrup 43 again in steel frame beam 32 positions.Design feature according to factory building reinforcing bar framework, when arranging the vertical applied force reinforcing bar 42 in steel frame beam 32 outsides, steel frame beam vertical applied force reinforcing bar 42 two ends need be fixed on the reinforced concrete column 31, arrange in order both to make things convenient for, can guarantee the quality of arranging again, the two ends of steel frame beam 32 outside vertical applied force reinforcing bars 42 are fixed on the reinforced concrete column 31 by straight thread reinforcing steel bar connecting sleeve tube 7, its order of placement is, earlier straight thread reinforcing steel bar connecting sleeve tube 7 is welded on the reinforced concrete column 31, again vertical applied force reinforcing bar 42 is split into two sections, and then at the end of vertical applied force reinforcing bar 42 cover system screw thread and be screwed onto on the qualified straight thread reinforcing steel bar connecting sleeve tube 7 of welding, at last corresponding vertical applied force reinforcing bar 42 is connected joint welding, its joint welding length is not less than 10d.The welding of straight thread reinforcing steel bar connecting sleeve tube 7 on reinforced concrete column 31 for the ease of steel frame beam 32 belows, also can be earlier with the straight thread reinforcing steel bar connecting sleeve tube 7 of described position before reinforced concrete column 31 is installed, install earlier be welded to the relevant position of reinforced concrete column 31 after, reinforced concrete column 31 is installed again.Adopt above-mentioned job practices just can guarantee the layout quality of the concrete reinforcement 4 of the concrete reinforcement 4 in steel frame 3 outsides and reinforced concrete column 31 and girder steel 32 junctions, and arrange also very convenient.
For concrete and steel frame 3 can effectively be bondd, steel frame 3 is being carried out before external wrapping concrete builds, the external surface to steel frame 3 carries out processing of rust removing earlier, is silver gray up to the external surface of steel frame 3; Simultaneously, in order to guarantee concrete pouring quality, the maximum particle diameter of stone of concrete that is used for encased steel skeleton 3 is less than the spacing of adjacent two vertical applied force reinforcing bars 42, and the concrete slump that mixes is 200 ± 10mm.
Claims (7)
1. the job practices of large-scale metallurgical industrial premises steel framed concrete beam may further comprise the steps,
A, installation steel frame (3), earlier previously prepared box reinforced concrete column (31) is installed on the installation basis that is embedded with stone bolt (6), tentatively fix with temporary fixed cable wind rope (8), and adjust verticality, center line and the installation elevation of backing plate (9) and cable wind rope (8) adjustment reinforced concrete column (31) by being arranged on the installation of installing on the basis; And then previously prepared H type steel frame beam (32) is installed between adjacent two reinforced concrete columns (31), make the last lower wing plate of H type steel frame beam (32), align with the inner lateral partitions (311) of installing in box reinforced concrete column (31) corresponding position, and after preliminary fixing, the solid welding of full penetration is gone up to reinforced concrete column (31) and is formed steel frame (3) again;
B, go up to arrange concrete reinforcement (4) at steel frame (3), arrange the concrete reinforcement (4) in reinforced concrete column (31) outside earlier, the concrete reinforcement (4) in steel frame beam (32) outside is arranged in the back, arranges the concrete reinforcement (4) of reinforced concrete column (31) and steel frame beam (32) junction at last;
C, build the reinforced concrete column concrete, arranging that qualified reinforced concrete column (31) concrete reinforcement (4) outside installs concreting template (5) earlier, adopt high the throwing to add the casting method that vibrates and build reinforced concrete column (31) casing inner concrete then, adopt the fixed point location casting method that vibrates to build the outer concrete of reinforced concrete column (31) casing;
D, build the steel frame beam concrete, undertaken by following step,
1) install concreting template (5) in concrete reinforcement (4) outside of arranging qualified steel frame beam (32) earlier,
2) adopt the one-sided one-sided casting method of driveing that vibrates of feeding intake to build the following concrete of steel frame beam (32) lower wing plate then, it is above to apart from the concrete below the upper flange 150mm to adopt the bilateral symmetry layering to feed intake to vibrate casting method to build lower wing plate, the symmetry that feeds intake in the middle part of adopting is driven the casting method that vibrates and is built the concrete that steel frame beam (32) is gone up remainder, up to building the concrete of finishing on the whole steel frame beam (32);
E, form removal, concrete curing are treated to remove formwork for placing (5) again after concrete strength reaches designing requirement, press the code requirement curing concrete.
2. the job practices of large-scale metallurgical industrial premises steel framed concrete beam according to claim 1, it is characterized in that: adopt one-sided feed intake vibrate one-sided when driveing casting method and building the following concrete of steel frame beam (32) lower wing plate, earlier the concrete that mixes is dropped into the pouring area from a side of steel frame beam (32), vibrate with vibratory equipment and to drive concrete its opposite side from steel frame beam (32) is extruded above more than the lower wing plate 100mm, change both sides two people's symmetries then into and vibrate, till all extruding from the opposite side of steel frame beam (32) from the new concrete that drops into of the side that feeds intake.
3. the job practices of large-scale metallurgical industrial premises steel framed concrete beam according to claim 1, it is characterized in that: adopting the bilateral symmetry branch to lead to feed intake the casting method that vibrates to build steel frame beam (32) lower wing plate more than extremely during the concrete below upper flange 150mm, every layer of thickness that feeds intake is no more than 300mm, feeding point dispersed placement when feeding intake, and continuous placing.
4. the job practices of large-scale metallurgical industrial premises steel framed concrete beam according to claim 1, it is characterized in that: adopt the middle part symmetry that feeds intake to drive the casting method that vibrates and build steel frame beam (32) when going up the concrete of remainder, the concrete that mixes drops into the pouring area from the middle part of steel frame beam (32), the thickness that feeds intake exceeds steel frame beam (32) upper flange 150～200mm, vibrate to steel frame beam (32) two ends from the centre with the equipment of vibrating then and drive concrete, extend to the end of steel frame beam (32) up to concrete, simultaneously, in the process of vibrating, remain the thickness of the regional inner concrete that vibrates.
5. the job practices of large-scale metallurgical industrial premises steel framed concrete beam according to claim 1, it is characterized in that: the reinforcing bar (4) that is arranged in steel frame (3) outside comprises peg (41), vertical applied force reinforcing bar (42) and crosswise fixed stirrup (43), undertaken by following step during layout, earlier peg (41) is welded on reinforced concrete column (31) and the steel frame beam (32), and then vertical applied force reinforcing bar (42) is arranged into the outside of reinforced concrete column (31) and steel frame beam (32), arrange prefabricated crosswise fixed stirrup (43) at last again.
6. according to the job practices of claim 1,2,3,4 or 5 described large-scale metallurgical industrial premises steel framed concrete beam, it is characterized in that: steel frame (3) is being carried out before external wrapping concrete builds, earlier the external surface to steel frame (3) carries out processing of rust removing, is silver gray up to the external surface of steel frame (3).
7. according to the job practices of claim 1,2,3,4 or 5 described large-scale metallurgical industrial premises steel framed concrete beam, it is characterized in that: the maximum particle diameter of stone of concrete that is used for encased steel skeleton (3) is less than the spacing of adjacent two vertical applied force reinforcing bars (42), and the concrete slump that mixes is 200 ± 10mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110068879XA CN102182309B (en) | 2011-03-22 | 2011-03-22 | Construction method of steel reinforced concrete beam of large metallurgical industry plant |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103009477A (en) * | 2012-12-29 | 2013-04-03 | 中建六局土木工程有限公司 | Construction method for prefabricated components for prefabricated component factory |
| CN103397741A (en) * | 2013-08-03 | 2013-11-20 | 叶长青 | Construction method for steel reinforced concrete beam |
| CN104032953A (en) * | 2014-06-12 | 2014-09-10 | 中国五冶集团有限公司 | Construction method for template leaking stoppage in special-shaped SRC (Steel Reinforced Concrete) column node region |
| CN104234432A (en) * | 2012-09-06 | 2014-12-24 | 山东聊建集团有限公司 | Construction method of garage roof structure |
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| CN1320750A (en) * | 2000-04-27 | 2001-11-07 | 世纪钢铁厂股份有限公司 | Construction method for steel structure, steel skeleton reinforced concrete |
| CN1363747A (en) * | 2001-01-10 | 2002-08-14 | 上海万通工程营造有限公司 | Construction method and concrete-steel beams and floor slabs of building with steel frame and its form hoist |
| CN1485509A (en) * | 2002-09-27 | 2004-03-31 | 刘志鹏 | Construction method of steel skeleton concrete building |
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| CN1320750A (en) * | 2000-04-27 | 2001-11-07 | 世纪钢铁厂股份有限公司 | Construction method for steel structure, steel skeleton reinforced concrete |
| CN1363747A (en) * | 2001-01-10 | 2002-08-14 | 上海万通工程营造有限公司 | Construction method and concrete-steel beams and floor slabs of building with steel frame and its form hoist |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234432A (en) * | 2012-09-06 | 2014-12-24 | 山东聊建集团有限公司 | Construction method of garage roof structure |
| CN104234432B (en) * | 2012-09-06 | 2016-09-14 | 山东聊建集团有限公司 | Shed deckhead construction method |
| CN103009477A (en) * | 2012-12-29 | 2013-04-03 | 中建六局土木工程有限公司 | Construction method for prefabricated components for prefabricated component factory |
| CN103009477B (en) * | 2012-12-29 | 2016-01-20 | 中建六局土木工程有限公司 | A kind of factory for prefabrication prefabricated components construction method |
| CN103397741A (en) * | 2013-08-03 | 2013-11-20 | 叶长青 | Construction method for steel reinforced concrete beam |
| CN104032953A (en) * | 2014-06-12 | 2014-09-10 | 中国五冶集团有限公司 | Construction method for template leaking stoppage in special-shaped SRC (Steel Reinforced Concrete) column node region |
| CN104032953B (en) * | 2014-06-12 | 2016-03-02 | 中国五冶集团有限公司 | Special-shaped SRC Column border node region template leak-blocking construction method |
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| CN102182309B (en) | 2012-07-25 |
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