CN105040880A - Roof steel structure and construction method thereof - Google Patents
Roof steel structure and construction method thereof Download PDFInfo
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- CN105040880A CN105040880A CN201510475170.XA CN201510475170A CN105040880A CN 105040880 A CN105040880 A CN 105040880A CN 201510475170 A CN201510475170 A CN 201510475170A CN 105040880 A CN105040880 A CN 105040880A
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Abstract
The invention discloses a roof steel structure. The roof steel structure comprises a concrete frame (1) encircled to form the roof contour, a plurality of main beams and a plurality of secondary beams, wherein the main beams and the secondary beams are arranged in the concrete frame (1). Each main beam is a beam string formed by a rigid beam (2), a lower chord rope (3) and a supporting rod (4). Each secondary beam is formed by a plurality of rigid secondary beam units (5). The two ends of the rigid secondary beam units located between two main beams are welded to the main beams on the two sides respectively. A roof steel structure construction process is further disclosed. The roof steel structure has the advantages that the matching application of the beam strings and the rigid beams is achieved, the beam strings and the rigid beams have complementary advantages, the roof steel structure has both the advantage of bearing vertical pressure through the beam strings and the advantage of bearing vertical and horizontal pressure and reverse pressure through the rigid secondary beams, so that the roof steel structure is good in stability; and compared with a rigid beam roof structure, the roof steel structure is light in self weight and convenient to construct.
Description
Technical field
The present invention relates to technical field of civil engineering, particularly, relate to a kind of rooftop air conditioning unit and construction method thereof.
Background technology
Tension string beam structure be a kind ofly to be winded up by rigidity, flexible cable, centre connect the Mixed Architecture formed with strut, its structure composition is a kind of self equilibrium systems, is a kind of large-span prestressed space structure system.Pretightning force tension string beam structure as the efficient structure-bearing system of one, by various construction project particularly large-span space structure roof system adopt, it takes full advantage of the overall structure stress performance that pull resistance that height wrings improves structure.But also there is the technical problem cannot bearing reversed load in beam string.
Summary of the invention
Technical problem to be solved by this invention is to provide that a kind of steadiness is good, the rooftop air conditioning unit of constructability and construction method thereof.
The present invention's adopted technical scheme that solves the problem is:
A kind of rooftop air conditioning unit, comprise the concrete frame surrounding roof system profile, the girder of the multiple horizontally sets be arranged in concrete frame and the secondary beam of multiple longitudinally setting, the concrete beam that concrete frame is extended by multiple different directions surrounds, concrete frame is arbitrary polygon, each concrete beam is a polygonal limit, the two ends of girder and secondary beam are all connected on the concrete beam of concrete frame
Described girder is the beam string be made up of reinforcing beam, last quarter rope and support bar, the two ends of last quarter rope are fixedly connected with the two ends of reinforcing beam, and reinforcing beam bottom is arranged at intervals with root support bar, and support bar one end is connected with reinforcing beam, the other end of support bar connects last quarter rope
Concrete frame is fixedly installed the supporting seat for installing girder, the two ends of reinforcing beam are installed on corresponding supporting seat;
Described secondary beam is made up of multiple rigidity time beam element, the two ends of time beam element of the rigidity between two girders are connected with the Main Girder Welding of both sides respectively, rigidity between girder with concrete frame time beam element one end is connected with Main Girder Welding, the anchor slab that the other end and concrete frame are preset is welded to connect, anchor slab is welded with multiple dowel be embedded in advance in concrete, dowel top and anchor slab are welded to connect, the other end of dowel is provided with crotch, be also provided with in concrete be placed in dowel crotch in and perpendicular to the joint bar of dowel.
Present invention achieves the fit applications of beam string and reinforcing beam, both the advantage of beam string and reinforcing beam had been taken full advantage of, overcome again the technological deficiency existing for each single beam, have complementary advantages, both there is the advantage that beam string can bear vertical pressure, born vertical-horizontal pressure and buffer brake by rigidity secondary beam again, make integral roof structural soundness good, and compare reinforcing beam roof structure, have from heavy and light, the advantage of constructability.
The position of reinforcing beam connection rigidity time beam element is provided with the joint A for connecting rigidity time beam element, the joint A shaped steel that to be cross section identical with the cross section of rigidity time beam element, joint A one end and reinforcing beam are welded to connect, the top of the other end of joint A is provided with a breach A, the bottom that rigidity time beam element connects one end of this joint A is provided with a breach B matched with breach A, one end of one end arranging breach A of joint A and rigidity time beam element setting party mouth B is welded to connect after combining and overlapping, form the connecting portion be fixedly connected with, the cross section of connecting portion is identical with the cross section of rigidity time beam element.This structure achieves the connection of beam string and secondary beam, and this structure makes the connecting portion of reinforcing beam and rigidity time beam element to be easy to construct, be easy to ensure the crudy of connecting portion.And the connected mode that joint A top arranges breach, rigidity time beam element connecting portion bottom arranges breach is also beneficial to the stressed of rigidity time beam element.
The bottom surface at the two ends of described reinforcing beam is provided with journal stirrup A, supporting seat is provided with journal stirrup B, journal stirrup A is connected by pin with journal stirrup B.The assembling that this structure achieves beam string end connects, and is convenient to dismounting and maintenance, and structure is simple, has saved installation cost and maintenance cost.
Further, described supporting seat comprises journal stirrup B, base plate, embedded board and cast-in fixing bolt, journal stirrup B is fixedly arranged on the top of base plate, embedded board and cast-in fixing bolt are embedded in concrete structure all in advance, base plate and embedded board are provided with the connecting hole matched with cast-in fixing bolt, cast-in fixing bolt passes the connecting hole of base plate and embedded board successively, and by the nut be installed on cast-in fixing bolt, base plate is fixedly connected with embedded board, journal stirrup A is connected by pin with the journal stirrup B that the supporting seat of respective side is arranged, and pin is perpendicular to the bearing of trend of journal stirrup A, journal stirrup B and reinforcing beam.Above-mentioned clamping support is firm, can meet the requirement of strength of beam string end winding support.
The bottom of described embedded board is also fixedly connected with the shearing resistance angle steel perpendicular to embedded board, and shearing resistance angle steel is pre-buried in concrete structure.Shearing resistance angle steel the shear behavior improving supporting seat is further set.
Described journal stirrup B has three intervals and arranges, and be parallel to an otic placode of the bearing of trend of reinforcing beam, the outside being positioned at an otic placode of both sides is provided with two stiffener D perpendicular to support plate, the bottom of stiffener D is fixedly connected with base plate, journal stirrup A has two intervals and arranges, and be parallel to an otic placode of the bearing of trend of reinforcing beam, three otic placodes that two of journal stirrup A otic placodes are plugged in journal stirrup B are formed in two grooves, preferably, an otic placode of journal stirrup A and an otic placode of journal stirrup B fit tightly, an otic placode of journal stirrup A and an otic placode of journal stirrup B are provided with pin hole.This structure further increases the steadiness of journal stirrup B, and the steadiness of the connection of beam string and supporting seat.
Supporting seat B is provided with the cast-in fixing bolt that four circumferences are uniform, the bottom of junction plate is provided with the uniform shearing resistance angle steel of four circumferences.The cast-in fixing bolt be evenly arranged and shearing resistance angle steel, make embedded board and supporting seat overall stressed more even, the performance of opposing different azimuth external force is more balanced.
The position of the bottom attachment support bar of reinforcing beam is provided with journal stirrup C, and the upper end of support bar is provided with journal stirrup D, and journal stirrup C is connected by pin with journal stirrup D.This structure achieves the assembly connection of connecting rod and reinforcing beam, easy disassembly.
Journal stirrup C comprises two intervals and arranges and the otic placode being parallel to the bearing of trend of reinforcing beam, two otic placode tops are fixedly connected with the junction plate fixedly fitting in reinforcing beam bottom surface, the outside of two otic placodes is all fixedly connected with that two intervals are arranged, perpendicular to the stiffener E of an otic placode, the top of stiffener E is fixedly connected with junction plate.The intensity arranging reinforcement reinforcing beam connection journal stirrup C portion of this junction plate, be ensure that the soundness of this body structure of journal stirrup C, thus enhances the steadiness of the syndeton of support bar and reinforcing beam on the whole by stiffener E.
The square-tube type girder steel of described reinforcing beam to be cross section be rectangle, the two ends of square-tube type girder steel are provided with the cast steel joint for fixing last quarter rope, the two ends of last quarter rope are fixedly connected with the cast steel joint of corresponding end respectively, cast steel joint is arranged in the rectangular cavity of square-tube type girder steel, cast steel joint is fixedly connected with the inwall of square-tube type girder steel by stiffener A, the rectangular cavity being positioned at the square-tube type girder steel inside cast steel joint is provided with two spaced stiffener B, stiffener B is perpendicular to box section girder steel, four edges of stiffener B are fixedly connected with the inwall of square-tube type girder steel respectively, and be fixedly connected with stiffener with cast steel joint near the stiffener B of cast steel joint, the bottom surface of stiffener B and square-tube type girder steel is provided with the resigning hole passed for last quarter rope, the stiffener C being parallel to box section girder steel is provided with between two stiffener B, four edges of stiffener C are fixedly connected with the inwall of corresponding stiffener B sidewall or square-tube type girder steel respectively.This arrangement simplifies the end winding support structure of last quarter rope, reduce the cost consumption of beam string equally; And by the setting of multiple stiffener, common reinforcement last quarter rope end winding support structure, makes the present invention can meet the duty requirements of the larger beam string of tensile force, has widened the scope of application.Preferably, journal stirrup A is positioned at the vertical lower of cast steel joint, can make full use of the structure of reinforcing beam end by stiffener reinforcement like this, thus promotes steadiness, the reliability of the syndeton of whole beam string and supporting seat.
The inside at the position of square-tube type girder steel jointing A is provided with two stiffener G perpendicular to reinforcing beam bearing of trend, and two sidewalls of two stiffener G and joint A are positioned at same plane, and stiffener G improves the intensity that reinforcing beam connects rigidity strutbeam portion.
The square-tube type girder steel being positioned at journal stirrup C top is provided with the stiffener F perpendicular to square-tube type girder steel bearing of trend.Stiffener F improves the intensity that reinforcing beam connects journal stirrup C portion.
The construction method of described rooftop air conditioning unit, comprises the following steps:
S1, carry out the assembled of girder, and implement prestressed stretch-draw;
S2, suspension centre is set on concrete frame top, by lifting appliance, assembled good girder is promoted, girder is lifted beyond the height of concrete frame;
S3, utilize Chain block coordinate lifting appliance girder is moved horizontally, girder is moved to installation position, then installs;
S4, after adjacent two Pin erection of main beams complete, namely rigidity between two Pin girders time beam element is installed;
S5, complete all girders and rigidity time beam element successively installation after, construction completes.
When girder being moved to installation position in described step S3, for the girder that length is the longest, it also comprises following operation: the angle steel arranging back-off on concrete frame, the rib of angle steel is positioned at top and crest line is concordant with the limit of concrete frame, by manipulation lifting appliance and Chain block, the reinforcing beam end of girder is positioned on the rib of angle steel, then by manipulation Chain block, drag girder to slide on the rib of angle steel, and finally slide into installation site.Because girder that length is the longest is the maximum transversal span of concrete frame, therefore when promoting, girder promotes after needing longitudinally to offset certain angle again, the top of concrete frame could be promoted to smoothly, when now this girder being moved horizontally to installation site, need the distance of translation longer, the movement of lifting appliance is coordinated comparatively to require great effort by means of only Chain block, the technical scheme that slippage assisted by angle steel being set by adopting, can greatly constructing operation being simplified, shorten the engineering time.
To sum up, the invention has the beneficial effects as follows:
1, present invention achieves the fit applications of beam string and reinforcing beam, both the advantage of beam string and reinforcing beam had been taken full advantage of, overcome again the technological deficiency existing for each single beam, have complementary advantages, both there is the advantage that beam string can bear vertical pressure, born vertical-horizontal pressure and buffer brake by rigidity secondary beam again, make integral roof structural soundness good, and compare reinforcing beam roof structure, have from heavy and light, the advantage of constructability.
2, the invention provides the syndeton of reinforcing beam and rigidity time beam element, this structure achieves the connection of beam string and secondary beam, and this structure makes the connecting portion of the secondary beam element of reinforcing beam and rigidity to be easy to construct, be easy to ensure the crudy of connecting portion.And the connected mode that joint A top arranges breach, rigidity time beam element connecting portion bottom arranges breach is also beneficial to the stressed of rigidity time beam element.
3, the invention provides the structure that beam string end is connected with supporting seat assembling, be convenient to dismounting and maintenance, structure is simple, has saved installation cost and maintenance cost; And clamping support is firm, can meet the requirement of strength of beam string end winding support.
4, to the invention provides reinforcing beam be cross section optimizing structure when being the square-tube type girder steel of rectangle, square-tube type girder steel is adopted to reduce cost of material, but performance also will be affected, and the present invention is by the setting of multiple stiffener, the reinforcement intensity at the stressed concentrated position of reinforcing beam, make to adopt square-tube type girder steel can meet the duty requirements of the larger beam string of tensile force equally, widen the scope of application of square-tube type girder steel.
5, present invention also offers the construction method of this rooftop air conditioning unit, the construction of rooftop air conditioning unit can be completed smoothly, in order, efficiently, and provide the optimization mounting method for the longer girder of length.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is plan structure schematic diagram of the present invention;
Fig. 3 is the syndeton schematic diagram of rigidity secondary beam of the present invention and concrete frame;
Fig. 4 is the syndeton schematic diagram of reinforcing beam of the present invention and rigidity secondary beam;
Fig. 5 is the schematic top plan view of the syndeton of reinforcing beam and rigidity secondary beam;
Fig. 6 is reinforcing beam end mounting structure schematic diagram;
Fig. 7 is the schematic side view of reinforcing beam end mounting structure;
Fig. 8 is reinforcing beam end plan structure schematic diagram;
Fig. 9 is the syndeton schematic diagram of reinforcing beam and support bar.
Mark and corresponding component title in accompanying drawing:
1-concrete frame, 2-reinforcing beam, 3-last quarter rope, 4-support bar, 5-rigidity time beam element, 6-anchor slab, 7-joint A, 8-journal stirrup A, 9-journal stirrup B, 10-base plate, 11-embedded board, 12-cast-in fixing bolt, 13-shearing resistance angle steel, 14-stiffener D, 15-journal stirrup C, 16-journal stirrup D, 17-stiffener E, 18-cast steel joint, 19-stiffener A, 20-stiffener B, 21-stiffener C, 22-stiffener G, 23-stiffener F.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the present invention's do, but embodiments of the present invention are not limited thereto.
Embodiment:
As shown in Figure 1 and Figure 2, a kind of rooftop air conditioning unit, a kind of rooftop air conditioning unit, comprise the concrete frame 1 surrounding roof system profile, the girder of the multiple horizontally sets be arranged in concrete frame 1 and the secondary beam of multiple longitudinally setting, the concrete beam that concrete frame 1 is extended by multiple different directions surrounds, and concrete frame 1 is arbitrary polygon, and each concrete beam is a polygonal limit, the two ends of girder and secondary beam are all connected on the concrete beam of concrete frame 1
Described girder is the beam string be made up of reinforcing beam 2, last quarter rope 3 and support bar 4, the two ends of last quarter rope 3 are fixedly connected with the two ends of reinforcing beam 2, and reinforcing beam 2 bottom is arranged at intervals with root support bar 4, and support bar 4 one end is connected with reinforcing beam 2, the other end of support bar 4 connects last quarter rope 3
Concrete frame 1 is fixedly installed the supporting seat for installing girder, the two ends of reinforcing beam 2 are installed on corresponding supporting seat;
Described secondary beam is made up of multiple rigidity time beam element 5, the two ends of time beam element 5 of the rigidity between two girders are connected with the Main Girder Welding of both sides respectively, rigidity between girder with concrete frame 1 time beam element 5 one end is connected with Main Girder Welding, the anchor slab 6 that the other end and concrete frame 1 are preset is welded to connect, as shown in Figure 2, anchor slab 6 is welded with multiple dowel be embedded in advance in concrete, dowel top and anchor slab 6 are welded to connect, the other end of dowel is provided with crotch, be also provided with in concrete be placed in dowel crotch in and perpendicular to the joint bar of dowel.
Present invention achieves the fit applications of beam string and reinforcing beam 2, both the advantage of beam string and reinforcing beam 2 had been taken full advantage of, overcome again the technological deficiency existing for each single beam, have complementary advantages, both there is the advantage that beam string can bear vertical pressure, born vertical-horizontal pressure and buffer brake by rigidity secondary beam again, make integral roof structural soundness good, and compare reinforcing beam 2 roof structure, have from heavy and light, the advantage of constructability.
The position that reinforcing beam 2 connects rigidity time beam element 5 is provided with the joint A7 for connecting rigidity time beam element 5, as Fig. 4, shown in Fig. 5, the joint A7 shaped steel that to be cross section identical with the cross section of rigidity time beam element 5, joint A7 one end and reinforcing beam 2 are welded to connect, the top of the other end of joint A7 is provided with a breach A, the bottom that rigidity time beam element 5 connects one end of this joint A7 is provided with a breach B matched with breach A, one end that one end arranging breach A of joint A7 and the secondary beam element 5 of rigidity arrange square opening B is welded to connect after combining and overlapping, form the connecting portion be fixedly connected with, the cross section of connecting portion is identical with the cross section of rigidity time beam element 5.This structure achieves the connection of beam string and secondary beam, and this structure makes reinforcing beam 2 and the connecting portion of rigidity time beam element 5 to be easy to construct, be easy to ensure the crudy of connecting portion.And the connected mode that joint A7 top arranges breach, rigidity time beam element 5 connecting portion bottom arranges breach is also beneficial to the stressed of rigidity time beam element 5.
As shown in Figure 6, Figure 7, the bottom surface at the two ends of described reinforcing beam 2 is provided with journal stirrup A8, supporting seat is provided with journal stirrup B9, journal stirrup A8 is connected by pin with journal stirrup B9.The assembling that this structure achieves beam string end connects, and is convenient to dismounting and maintenance, and structure is simple, has saved installation cost and maintenance cost.
Further, described supporting seat comprises journal stirrup B9, base plate 10, embedded board 11 and cast-in fixing bolt 12, journal stirrup B9 is fixedly arranged on the top of base plate 10, embedded board 11 and cast-in fixing bolt 12 are embedded in concrete structure all in advance, base plate 10 and embedded board 11 are provided with the connecting hole matched with cast-in fixing bolt 12, cast-in fixing bolt 12 passes the connecting hole of base plate 10 and embedded board 11 successively, and by the nut be installed on cast-in fixing bolt 12, base plate 10 is fixedly connected with embedded board 11, journal stirrup A8 is connected by pin with the journal stirrup B9 that the supporting seat of respective side is arranged, pin is perpendicular to journal stirrup A8, the bearing of trend of journal stirrup B9 and reinforcing beam 2.Above-mentioned clamping support is firm, can meet the requirement of strength of beam string end winding support.
The bottom of described embedded board 11 is also fixedly connected with the shearing resistance angle steel 13 perpendicular to embedded board 11, and shearing resistance angle steel 13 is embedded in concrete structure in advance.Shearing resistance angle steel 13 the shear behavior improving supporting seat is further set.
Described journal stirrup B9 has three intervals and arranges, and be parallel to an otic placode of the bearing of trend of reinforcing beam 2, the outside being positioned at an otic placode of both sides is provided with two stiffener D14 perpendicular to support plate, the bottom of stiffener D14 is fixedly connected with base plate 10, journal stirrup A8 has two intervals and arranges, and be parallel to an otic placode of the bearing of trend of reinforcing beam 2, three otic placodes that two of journal stirrup A8 otic placodes are plugged in journal stirrup B9 are formed in two grooves, preferably, an otic placode of journal stirrup A8 and an otic placode of journal stirrup B9 fit tightly, an otic placode of journal stirrup A8 and an otic placode of journal stirrup B9 are provided with pin hole.This structure further increases the steadiness of journal stirrup B9, and the steadiness of the connection of beam string and supporting seat.
Supporting seat B is provided with the cast-in fixing bolt 12 that four circumferences are uniform, the bottom of junction plate is provided with the uniform shearing resistance angle steel 13 of four circumferences.The cast-in fixing bolt 12 be evenly arranged and shearing resistance angle steel 13, make embedded board 11 and supporting seat overall stressed more even, the performance of opposing different azimuth external force is more balanced.
As shown in Fig. 4, Fig. 9, the position of the bottom attachment support bar 4 of reinforcing beam 2 is provided with journal stirrup C15, and the upper end of support bar 4 is provided with journal stirrup D16, and journal stirrup C15 is connected by pin with journal stirrup D16.This structure achieves the assembly connection of connecting rod and reinforcing beam 2, easy disassembly.
Journal stirrup C15 comprises two intervals and arranges and the otic placode being parallel to the bearing of trend of reinforcing beam 2, two otic placode tops are fixedly connected with the junction plate fixedly fitting in reinforcing beam 2 bottom surface, the outside of two otic placodes is all fixedly connected with that two intervals are arranged, perpendicular to the stiffener E17 of an otic placode, the top of stiffener E17 is fixedly connected with junction plate.This junction plate the intensity that reinforcement reinforcing beam 2 connects journal stirrup C15 portion is set, be ensure that the soundness of this body structure of journal stirrup C15 by stiffener E17, thus enhance the steadiness of support bar 4 and the syndeton of reinforcing beam 2 on the whole.
As Fig. 6, Fig. 7, shown in Fig. 8, described reinforcing beam 2 for cross section be the square-tube type girder steel of rectangle, the two ends of square-tube type girder steel are provided with the cast steel joint 18 for fixing last quarter rope 3, the two ends of last quarter rope 3 are fixedly connected with the cast steel joint 18 of corresponding end respectively, cast steel joint 18 is arranged in the rectangular cavity of square-tube type girder steel, cast steel joint 18 is fixedly connected with the inwall of square-tube type girder steel by stiffener A19, the rectangular cavity being positioned at the square-tube type girder steel inside cast steel joint 18 is provided with two spaced stiffener B20, stiffener B20 is perpendicular to box section girder steel, four edges of stiffener B20 are fixedly connected with the inwall of square-tube type girder steel respectively, and be fixedly connected with stiffener with cast steel joint 18 near the stiffener B20 of cast steel joint 18, the bottom surface of stiffener B20 and square-tube type girder steel is provided with the resigning hole passed for last quarter rope 3, the stiffener C21 being parallel to box section girder steel is provided with between two stiffener B20, four edges of stiffener C21 are fixedly connected with the inwall of corresponding stiffener B20 sidewall or square-tube type girder steel respectively.This arrangement simplifies the end winding support structure of last quarter rope 3, reduce the cost consumption of beam string equally; And by the setting of multiple stiffener, common reinforcement last quarter rope 3 end winding support structure, makes the present invention can meet the duty requirements of the larger beam string of tensile force, has widened the scope of application.Preferably, journal stirrup A8 is positioned at the vertical lower of cast steel joint 18, can make full use of the structure of reinforcing beam 2 end by stiffener reinforcement like this, thus promote steadiness, the reliability of the syndeton of whole beam string and supporting seat.
As shown in Figure 5, the inside at the position of square-tube type girder steel jointing A7 is provided with two stiffener G22 perpendicular to reinforcing beam 2 bearing of trend, two sidewalls of two stiffener G22 and joint A7 are positioned at same plane, and stiffener G22 improves the intensity that reinforcing beam 2 connects rigidity strutbeam portion.
As Fig. 5, Fig. 9 depicted, the square-tube type girder steel being positioned at journal stirrup C15 top is provided with the stiffener F23 perpendicular to square-tube type girder steel bearing of trend.Stiffener F23 improves the intensity that reinforcing beam 2 connects journal stirrup C15 portion.
The construction method of described rooftop air conditioning unit, comprises the following steps:
S1, carry out the assembled of girder, and implement prestressed stretch-draw;
S2, suspension centre is set on concrete frame top, by lifting appliance, assembled good girder is promoted, girder is lifted beyond the height of concrete frame;
S3, utilize Chain block coordinate lifting appliance girder is moved horizontally, girder is moved to installation position, then installs;
S4, after adjacent two Pin erection of main beams complete, namely rigidity between two Pin girders time beam element is installed;
S5, complete all girders and rigidity time beam element successively installation after, construction completes.
When girder being moved to installation position in described step S3, for the girder that length is the longest, it also comprises following operation: the angle steel arranging back-off on concrete frame, the rib of angle steel is positioned at top and crest line is concordant with the limit of concrete frame, by manipulation lifting appliance and Chain block, the reinforcing beam end of girder is positioned on the rib of angle steel, then by manipulation Chain block, drag girder to slide on the rib of angle steel, and finally slide into installation site.Because girder that length is the longest is the maximum transversal span of concrete frame, therefore when promoting, girder promotes after needing longitudinally to offset certain angle again, the top of concrete frame could be promoted to smoothly, when now this girder being moved horizontally to installation site, need the distance of translation longer, the movement of lifting appliance is coordinated comparatively to require great effort by means of only Chain block, the technical scheme that slippage assisted by angle steel being set by adopting, can greatly constructing operation being simplified, shorten the engineering time.
As mentioned above, the present invention can be realized preferably.
Claims (9)
1. a rooftop air conditioning unit, it is characterized in that, comprise the concrete frame (1) surrounding roof system profile, the girder being arranged at the multiple horizontally sets in concrete frame (1) and multiple secondary beam longitudinally arranged, described girder is the beam string be made up of reinforcing beam (2), last quarter rope (3) and support bar (4), concrete frame (1) is fixedly installed the supporting seat for installing girder, the two ends of reinforcing beam (2) are installed on corresponding supporting seat; Described secondary beam is made up of multiple rigidity time beam element (5), the two ends of time beam element (5) of the rigidity between two girders are connected with the Main Girder Welding of both sides respectively, rigidity time beam element (5) one end be positioned between girder with concrete frame (1) is connected with Main Girder Welding, the other end and the upper anchor slab (6) preset of concrete frame (1) are welded to connect, and anchor slab (6) is welded with multiple dowel be embedded in advance in concrete.
2. a kind of rooftop air conditioning unit according to claim 1, it is characterized in that, the position of reinforcing beam (2) connection rigidity time beam element (5) is provided with the joint A(7 for connecting rigidity time beam element (5)), joint A(7) be the cross section shaped steel identical with the cross section of rigidity time beam element (5), joint A(7) one end and reinforcing beam (2) be welded to connect, joint A(7) the top of the other end be provided with a breach A, rigidity time beam element (5) connects this joint A(7) the bottom of one end be provided with a breach B matched with breach A, joint A(7) one end that breach A is set and rigidity time beam element (5) one end that square opening B is set combine overlap after be welded to connect.
3. a kind of rooftop air conditioning unit according to claim 1, is characterized in that, the bottom surface at the two ends of described reinforcing beam (2) is provided with journal stirrup A(8), supporting seat is provided with journal stirrup B(9), journal stirrup A(8) with journal stirrup B(9) be connected by pin.
4. a kind of rooftop air conditioning unit according to claim 3, it is characterized in that, described supporting seat comprises journal stirrup B(9), base plate (10), embedded board (11) and cast-in fixing bolt (12), journal stirrup B(9) be fixedly arranged on the top of base plate (10), embedded board (11) and cast-in fixing bolt (12) are embedded in concrete structure all in advance, base plate (10) and embedded board (11) are provided with the connecting hole matched with cast-in fixing bolt (12), cast-in fixing bolt (12) passes the connecting hole of base plate (10) and embedded board (11) successively, and by the nut be installed on cast-in fixing bolt (12), base plate (10) is fixedly connected with embedded board (11), journal stirrup A(8) with the journal stirrup B(9 that the supporting seat of respective side is arranged) be connected by pin, pin is perpendicular to journal stirrup A(8), journal stirrup B(9) and the bearing of trend of reinforcing beam (2).
5. a kind of rooftop air conditioning unit according to claim 4, it is characterized in that, the position of the bottom attachment support bar (4) of described reinforcing beam (2) is provided with journal stirrup C(15), the upper end of support bar (4) is provided with journal stirrup D(16), journal stirrup C(15) with journal stirrup D(16) be connected by pin.
6. according to a kind of rooftop air conditioning unit in Claims 1 to 5 described in Arbitrary Term, it is characterized in that, described reinforcing beam (2) for cross section be the square-tube type girder steel of rectangle, the two ends of square-tube type girder steel are provided with the cast steel joint (18) for fixing last quarter rope (3), the two ends of last quarter rope (3) are fixedly connected with the cast steel joint (18) of corresponding end respectively, cast steel joint (18) is arranged in the rectangular cavity of square-tube type girder steel, cast steel joint (18) is by stiffener A(19) be fixedly connected with the inwall of square-tube type girder steel, the rectangular cavity being positioned at the square-tube type girder steel of cast steel joint (18) inner side is provided with two spaced stiffener B(20), stiffener B(20) perpendicular to box section girder steel, stiffener B(20) four edges be fixedly connected with the inwall of square-tube type girder steel respectively, and the stiffener B(20 of close cast steel joint (18)) be fixedly connected with stiffener with cast steel joint (18), stiffener B(20) and square-tube type girder steel bottom surface on be provided with the resigning hole passed for last quarter rope (3), two stiffener B(20) between be provided with the stiffener C(21 being parallel to box section girder steel), stiffener C(21) four edges respectively with corresponding stiffener B(20) inwall of sidewall or square-tube type girder steel is fixedly connected with.
7. a kind of rooftop air conditioning unit according to claim 1, it is characterized in that, described square-tube type girder steel jointing A(7) the inside at position be provided with two stiffener G(22 perpendicular to reinforcing beam (2) bearing of trend), two stiffener G(22) with joint A(7) two sidewalls be positioned at same plane, journal stirrup A(8) be positioned at the vertical lower of cast steel joint (18), be positioned at journal stirrup C(15) the square-tube type girder steel on top is provided with stiffener F(23 perpendicular to square-tube type girder steel bearing of trend).
8. the construction method of a kind of rooftop air conditioning unit as claimed in claim 1, is characterized in that, comprise the following steps:
S1, carry out the assembled of girder, and implement prestressed stretch-draw;
S2, suspension centre is set on concrete frame top, by lifting appliance, assembled good girder is promoted, girder is lifted beyond the height of concrete frame;
S3, utilize Chain block coordinate lifting appliance girder is moved horizontally, girder is moved to installation position, then installs;
S4, after adjacent two Pin erection of main beams complete, namely rigidity between two Pin girders time beam element is installed;
S5, complete all girders and rigidity time beam element successively installation after, construction completes.
9. the construction method of a kind of rooftop air conditioning unit according to claim 8, it is characterized in that, when girder being moved to installation position in described step S3, for the girder that length is the longest, it also comprises following operation: the angle steel arranging back-off on concrete frame, the rib of angle steel is positioned at top and crest line is concordant with the limit of concrete frame, by manipulation lifting appliance and Chain block, the reinforcing beam end of girder is positioned on the rib of angle steel, again by manipulation Chain block, drag girder to slide on the rib of angle steel, and finally slide into installation site.
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