CN117145268A - Jig frame supporting system for steel structure sliding and steel structure construction method - Google Patents
Jig frame supporting system for steel structure sliding and steel structure construction method Download PDFInfo
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- CN117145268A CN117145268A CN202311299345.7A CN202311299345A CN117145268A CN 117145268 A CN117145268 A CN 117145268A CN 202311299345 A CN202311299345 A CN 202311299345A CN 117145268 A CN117145268 A CN 117145268A
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- truss structure
- steel truss
- structure roof
- steel
- supporting
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 238
- 239000010959 steel Substances 0.000 title claims abstract description 238
- 238000010276 construction Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 31
- 238000003825 pressing Methods 0.000 claims description 8
- 210000001503 joint Anatomy 0.000 claims description 5
- 238000009435 building construction Methods 0.000 abstract description 4
- 238000003466 welding Methods 0.000 description 13
- 238000009434 installation Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009414 blockwork Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/11—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with non-parallel upper and lower edges, e.g. roof trusses
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/162—Handles to carry construction blocks
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/163—Jacks specially adapted for working-up building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/167—Tools or apparatus specially adapted for working-up plates, panels or slab shaped building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
- E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
Abstract
The invention discloses a jig frame supporting system for steel structure sliding and a steel structure construction method, wherein the jig frame supporting system comprises a middle supporting jig frame, side supporting jig frames, an operation platform and an adjusting assembly; the side support jig frames and the middle support jig frames are erected on the bottom plate, a pair of support jig frames are positioned in front of the structural beam column, the middle support jig frames are erected between the pair of side support jig frames, and the operation platform is arranged at the top of the middle support jig frames; the outer ends of the two sections of steel truss structure roof units are arranged on the supporting jig frame, the adjusting assembly is arranged on the operating platform and can support the inner ends of the two sections of steel truss structure roof units in an adjustable mode, and the two sections of steel truss structure roof units are spliced into a Shangang truss structure roof; the steel truss structure roofs are formed by connecting a plurality of single steel truss structure roofs. The invention relates to the technical field of building construction, and can solve the problems that in the prior art, a steel truss with long span and large single truss weight is easy to generate structural deformation, and the steel truss is easy to bend under dead weight and overturn in the sliding process.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a jig frame supporting system for steel structure sliding and a steel structure construction method.
Background
In recent years, steel structures are increasingly used in building construction, especially in large-span large-scale stadium construction. The method is characterized in that 6 exhibition halls are included in a certain building engineering, wherein 4 heavy exhibition halls are included, two layers are arranged on the ground, and no basement exists; 2 standard exhibition halls, two ground floors and one underground floor; in addition, there are 1 login halls. The heavy exhibition hall steel truss roof structure is constructed in an in-situ hoisting and mounting mode; the standard exhibition hall steel truss roof structure is constructed in a cumulative sliding mode.
When the standard exhibition hall steel truss roof structure is constructed, the steel truss is constructed on a basement structural plate, and the construction method adopts sliding construction. The steel truss structure roof is about 144 m long and about 99 m wide, and the single truss weighs about 140 tons, and has the characteristics of long span, large single truss weight and the like. In the whole construction process, the steps of installation, hoisting, sliding, overall unloading stabilization and the like of the steel truss are needed, and the conventional jig frame supporting system is extremely easy to generate risks of structural deformation, dead weight bending, overturning in the sliding process and the like when constructing the steel truss with long span and large single truss weight. Therefore, a jig frame supporting system for steel structure sliding and a steel structure construction method are needed to be provided, and the problems that in the prior art, structural deformation, dead weight bending and overturning in the sliding process are easy to occur during construction of a steel truss with long span and large single truss weight can be solved.
Disclosure of Invention
The invention aims to provide a jig frame supporting system for steel structure sliding and a steel structure construction method, which can solve the problems that in the prior art, structural deformation, dead weight bending and overturning in the sliding process are easy to occur during construction of a steel truss with long span and large single truss weight.
The invention is realized in the following way:
a jig frame supporting system for steel structure sliding comprises a middle supporting jig frame, a side supporting jig frame, an operation platform and an adjusting assembly; the pair of side support jig frames are respectively erected on the bottom plate and are respectively positioned in front of structural beam columns at two ends of the steel truss structure roof; the middle supporting jig frame is erected on the bottom plate and positioned between the pair of side supporting jig frames, and the operating platform is arranged at the top of the middle supporting jig frame; the bottoms of the outer ends of the two sections of steel truss structure roof units are respectively arranged on a pair of supporting jig frames, an adjusting assembly is arranged on an operation platform and can be adjustably supported on the bottoms of the inner ends of the two sections of steel truss structure roof units, so that the inner ends of the two sections of steel truss structure roof units are spliced on the operation platform to form a single steel truss structure roof; the steel truss structure roofs of a plurality of single steel truss structures are connected into the steel truss structure roofs through connecting beams, and the steel truss structure roofs slide onto structural beam columns.
The middle supporting jig frame and the side supporting jig frames comprise supporting bailey frames, supporting bases and supporting top beams; the support base is arranged on the bottom plate, and the top of each support bailey frame is provided with a support top beam; the operation platform is erected on the supporting top beams at the tops of the plurality of supporting bailey frames of the middle supporting jig frame, and the bottoms of the outer ends of the two sections of steel truss structure roof units are respectively arranged on the supporting top beams at the tops of the plurality of supporting bailey frames of the pair of side supporting jig frames.
The two adjacent support bailey frames are connected through a temporary connection tie rod, and the temporary connection tie rod is arranged in a plurality of channels at intervals along the height direction of the support bailey frames; cable ropes are obliquely and obliquely arranged between two sides of the support bailey frame and the bottom plate.
The supporting top beam at the top of the side supporting jig frame is provided with a first jack, and the top extension end of the first jack is supported at the bottom of the connecting beam.
The adjusting assembly comprises adjusting type supporting columns and anti-overturning supporting columns, a plurality of adjusting type supporting columns are respectively arranged on the operating platform at intervals, and the adjusting type supporting columns are respectively propped against the bottoms of steel rod pieces at the inner ends of two sections of steel truss structure roof units; the plurality of anti-overturning supporting columns are arranged on the operating platform in pairs, and each pair of anti-overturning supporting columns correspondingly props against the bottoms of the two sections of steel truss structure roof units respectively.
The adjustable supporting upright post comprises an upright post base, a limiting clamping seat, a second jack and a bracket head; the lower end of the upright post base is fixedly arranged on the operation platform, and the limit clamping seat is fixedly arranged at the upper end of the upright post base; the bottom of the second jack is embedded in the limiting clamping seat in a matched mode, the top extending end of the second jack is connected with the support head, and the steel rod piece of the steel truss structure roof unit is embedded in the support head.
The anti-overturning support columns are distributed around the outer sides of the adjusting support columns and are supported on waist chords of the steel truss structure roof units.
A steel structure construction method adopting a jig frame supporting system for steel structure sliding comprises the following steps:
step 1: the mounting rail, the embedded plate and the pressing plate;
step 2: carrying out stress analysis on the steel truss structure roof, and dividing the single steel truss structure roof into two sections of steel truss structure roof units according to stress conditions;
step 3: assembling two sections of steel truss structure roof units;
step 4: setting up a middle supporting jig frame and a pair of side supporting jig frames, wherein the middle supporting jig frame is positioned at the middle position of the pair of side supporting jig frames, and setting up an operation platform and an adjusting assembly on the top of the middle supporting jig frame;
step 5: the two sections of steel truss structure roof units are adjusted to be consistent in height on an operation platform through an adjusting assembly, and are subjected to high-altitude butt joint assembly and welded and fixed to form a Shangang truss structure roof;
step 6: sliding the roof of the single steel truss structure in a mode of accumulated sliding and integral sliding;
step 7: arching is unloaded.
The process of accumulated slip is as follows: after the assembly of the single steel truss structure roof of the first truss is completed, integrally sliding the single steel truss structure roof of the first truss; assembling the single steel truss structure roof of the second truss, and connecting a connecting beam between the single steel truss structure roof of the first truss and the single steel truss structure roof of the second truss; unloading and synchronously sliding the single steel truss structure roofs of the first truss and the second truss; assembling the single steel truss structure roof of the third truss, and connecting a connecting beam between the single steel truss structure roof of the third truss and the single steel truss structure roof of the second truss; unloading and synchronously sliding the single steel truss structure roofs of the first truss to the third truss; and by analogy, finishing the accumulated sliding of the single steel truss structure roof of the previous N truss.
The whole sliding process comprises the following steps: assembling the single steel truss structure roof of the (n+1) th truss, and connecting a connecting beam between the single steel truss structure roof of the (n+1) th truss and the single steel truss structure roof of the (N); and unloading and synchronously sliding the single steel truss structure roofs of the first truss to the N truss, and integrally sliding to the design position.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention is provided with the middle supporting jig, the operating platform and the adjusting component, so that the inner ends of the two sections of steel truss structure roof units can be supported by the middle supporting jig, a construction space is provided for butt welding of the inner ends of the two sections of steel truss structure roof units by the operating platform, and meanwhile, the height of the two sections of steel truss structure roof units is finely adjusted and finely adjusted by the adjusting component, so that the welding quality of the single steel truss structure roof is ensured, and the problems of structural deformation, dead weight downwarping and the like during unloading can be effectively avoided.
2. The invention is provided with the pair of side support moulding bed and the first jack, so that the outer ends of the two sections of steel truss structure roof units can be supported by the pair of side support moulding bed, and the first jack is matched with the connecting beam to realize levelness adjustment of the single steel truss structure roof and correct the posture before sliding, thereby ensuring the stable and safe sliding of the single steel truss structure roof and effectively avoiding the problem of overturning in the sliding process.
Drawings
FIG. 1 is a schematic construction view of a jig frame support system for steel structure slippage of the present invention;
FIG. 2 is a front view of an intermediate support jig in the jig frame support system for steel structure slippage of the present invention;
FIG. 3 is a front view of an adjustable support column in the jig frame support system for steel structure slippage of the present invention;
fig. 4 is a schematic view of the adjustment of the adjustable support column in the jig frame support system for steel structure slippage according to the present invention (left view is before adjustment, right view is after adjustment).
In the figure, 1 middle supporting jig, 2 single steel truss structure roofs, 301 supporting bailey frames, 302 supporting bases, 303 supporting top beams, 304 temporary connection tie bars, 4 side supporting jig, 401 first jacks, 5 structural beam columns, 6 operation platforms, 701 adjusting supporting upright columns, 702 anti-overturning supporting upright columns, 703 upright column bases, 704 limiting clamping seats, 705 second jacks, 706 supporting heads and 8 connecting beams.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
Referring to fig. 1, a jig frame support system for steel structure sliding comprises a middle support jig frame 1, a side support jig frame 4, an operation platform 6 and an adjusting assembly; the pair of side support jig frames 4 are respectively erected on the bottom plate, and the pair of support jig frames 4 are respectively positioned in front of the structural beam columns 5 at the two ends of the steel truss structure roof, namely at the sliding starting point of the steel truss structure roof; the middle supporting jig frame 1 is erected on the bottom plate and is positioned between the pair of side supporting jig frames 4, and the operating platform 6 is arranged at the top of the middle supporting jig frame 1; the bottoms of the outer ends of the two sections of steel truss structure roof units (namely, the two ends of the single steel truss structure roof 2) are respectively arranged on a pair of supporting jig frames 4, an adjusting assembly is arranged on an operating platform 6 and can be adjustably supported on the bottoms of the inner ends of the two sections of steel truss structure roof units (namely, the middle of the single steel truss structure roof 2), so that the inner ends of the two sections of steel truss structure roof units are spliced on the operating platform 6 to form the single steel truss structure roof 2; the steel truss structure roofs 2 of a plurality of single steel truss structures are connected into the steel truss structure roofs through connecting beams 8, and the steel truss structure roofs slide onto the structural beam columns 5.
Preferably, the size of the operation platform 6 is 6×8m, which can be adjusted according to actual construction requirements, the operation platform 6 comprises a bottom plate and a fence, the HW300×300×10×15 section steel is adopted to be erected through a conventional process, the structure of the operation platform 6 adopts a conventional structure of the operation platform in building construction, and specific structure and erection process of the operation platform 6 are not repeated here.
The pair of side support moulding bed 4 is used for supporting the outer end of two sections of steel truss structure roof units respectively, and the middle support moulding bed 1 is used for supporting the inner end of two sections of steel truss structure roof units, so that the two sections of steel truss structure roof units can be conveniently butted and welded on the operation platform 6 after being adjusted by the adjusting component, a single steel truss structure roof 2 is formed, the butting quality is improved, and the problems of structural deformation, dead weight downwarping and the like of the single steel truss structure roof 2 are avoided.
The single steel truss structure roofs 2 are connected through connecting beams 8 to form the steel truss structure roofs. The pair of side support jig frames 4 are erected in front of the structural beam columns 5, and after the single steel truss structure roof 2 is assembled, the single steel truss structure roof 2 can be slipped to the designed position on the structural beam columns 5. The single steel truss structure roof 2 or the steel truss structure roof can slide on the structural beam columns 5 at two ends of the steel truss structure roof to a design position, and the sliding structure and the sliding method can adopt the conventional sliding structure and method of the steel truss, which are not described herein.
Referring to fig. 2, the middle support jig 1 and the side support jig 4 each include a support bailey 301, a support base 302, and a support top beam 303; the support bailey frames 301 are respectively arranged at intervals, the bottom of each support bailey frame 301 is erected on the bottom plate through a support base 302, and the top of each support bailey frame 301 is provided with a support top beam 303; the operation platform 6 is erected on the supporting top beams 303 on the top of the plurality of supporting bailey frames 301 of the middle supporting jig frame 1, and the bottoms of the outer ends of the two-section steel truss structure roof units are respectively arranged on the supporting top beams 303 on the top of the plurality of supporting bailey frames 301 of the pair of side supporting jig frames 4.
Preferably, the support base 302 and the support top beam 303 can use a conversion node made of HW150×150×7×10 steel, and the support bailey frame 301 can use a 321 bailey frame, which has good structural strength and bearing capacity. The support bailey frames 301 are adopted as support frames, so that the stability and reliability of support are guaranteed, the construction period is shortened, and the number of the support bailey frames 301 can be adjusted according to actual support requirements.
Referring to fig. 2, two adjacent support bailey frames 301 are connected by a temporary connection tie bar 304, and the temporary connection tie bars 304 are arranged in a plurality of ways along the height direction of the support bailey frames 301; a cable wind rope (not shown) is obliquely arranged between the two sides of the support bailey 301 and the bottom plate.
By means of the arrangement of the temporary connection tie bars 304 and the cable ropes, the structural strength and the bearing capacity of the middle supporting jig frame 1 and the side supporting jig frames 4 are improved, and the safety and the quality of large-span and heavy steel truss structure roof assembly and sliding construction are ensured.
Referring to fig. 1, a first jack 401 is provided on the supporting top beam 303 at the top of the side supporting jig frame 4, and the top end of the first jack 401 is supported at the bottom of the connecting beam 8.
The first jack 401 applies a jacking force to the connecting beam 8, and the height of the connecting beam 8 can be adjusted, so that the heights of the two ends of the single steel truss structure roof 2 are adjusted, the heights of the two ends of the single steel truss structure roof 2 are consistent, the single steel truss structure roof 2 is convenient to safely and integrally slide, and overturning in the sliding process is avoided.
Referring to fig. 1, the adjusting assembly includes an adjusting support column 701 and an anti-overturning support column 702, wherein a plurality of adjusting support columns 701 are respectively and alternately arranged on the operating platform 6, and a plurality of adjusting support columns 701 are respectively supported at the bottoms of steel rod pieces at the inner ends of two sections of steel truss structure roof units; the plurality of anti-overturning support columns 702 are arranged on the operating platform 6 in pairs, and each pair of anti-overturning support columns 702 correspondingly props against the bottoms of the two sections of steel truss structure roof units respectively.
The number of the adjusting type supporting columns 701 and the anti-overturning supporting columns 702 can be adaptively adjusted according to actual supporting requirements. Preferably, the adjustable support columns 701 are provided with 6 columns and are arranged in a matrix manner, and are used for providing stable support and lifting adjustment for the inner ends of the steel pole pieces; the anti-overturning support columns 702 are provided with 4 support columns and are distributed at corners of the operating platform 6, and waist chords for the two-section steel truss structure roof provide support to prevent overturning in the assembly process.
Referring to fig. 3 and 4, the adjustable support column 701 includes a column base 703, a limit clamping seat 704, a second jack 705, and a support head 706; the lower end of the upright post base 703 is fixedly arranged on the operating platform 6, and a limit clamping seat 704 is fixedly arranged at the upper end of the upright post base 703; the bottom of the second jack 705 is embedded in the limit clamping seat 704 in a matching way, the top extending end of the second jack 705 is connected with the bracket head 706, and the steel rod piece of the steel truss structure roof unit is embedded in the bracket head 706.
Preferably, the bracket head 706 can adopt a U-shaped structure or a semicircular structure, can better match the shape of a steel rod, is convenient for stably supporting the steel rod of the single steel truss structure roof 2, and prevents the single steel truss structure roof 2 from falling off or overturning from the bracket head 706. The upright post base 703 and the bracket head 706 can be made of steel rod pieces, the limit clamping seat 704 can be made of steel plates, the bearing capacity is high, and the reliable support of the roof 2 with the single steel truss structure is ensured; the limit clamping seat 704 can adopt a hollow cylindrical structure with an open top, and is used for ensuring the installation and the use stability of the second jack 705.
The second jack 705 can be used for jacking the two-section steel truss structure roof unit, the height of the steel rod pieces is finely adjusted, the height consistency of the steel rod pieces of the two-section steel truss structure roof unit is ensured, as shown in fig. 4, the butt joint and welding of the steel rod pieces of the two-section steel truss structure roof unit are convenient, and the welding quality is ensured.
Referring to fig. 1, the anti-overturning support columns 702 are distributed around the outer sides of the adjusting support columns 701, and the anti-overturning support columns 702 are supported on waist chords of the steel truss structure roof units, so that stability of the single steel truss structure roof 2 can be improved, and an anti-overturning effect is achieved.
Referring to fig. 1 to 4, a steel structure construction method using a jig frame supporting system for sliding of a steel structure includes the following steps:
step 1: mounting rail, pre-buried board and clamp plate.
And installing embedded plates and pressing plates on structural beam columns 5 at two ends of the steel truss structure roof, installing tracks through the embedded plates and fixing through the pressing plates, and being used for sliding of the steel truss structure roof. The rail, the embedded plate and the pressing plate are conventional structures for sliding construction of the steel truss structure, the rail, the embedded plate and the pressing plate can be installed by adopting a conventional construction process, and the main construction process is as follows:
the total number of embedded plates in a standard exhibition hall is 192, before binding of the reinforcing steel bars at the top of a concrete frame column of the structural beam column 5 is completed, the structural beam column 5 is hoisted to a corresponding position, a main structure construction unit is coordinated in advance, the embedded positions of anchor bars and cross shear keys of the embedded plates are reserved at the top of the frame column, coordinates are measured on the reinforcing steel bars of civil engineering through a total station, a steel ruler and the like, and paying-off marks are made. And (3) finishing the embedded plate in place according to the axis of the embedded plate and the elevation control line, wherein the installation elevation of the embedded plate in a standard exhibition hall is +13.000m, the embedded plate is welded and fixed with the steel bars, and after finishing in place, checking by a supervision method, and pouring the concrete of the frame column after acceptance inspection is qualified.
After the concrete construction of the frame column is completed, 2 sliding rails of 142m are paved in the exhibition hall according to working condition analysis, and the sliding rails are parallelly paved above the sliding beams or the struts of the structural beam column 5 through pressing plates. The standard exhibition hall sliding rail adopts a 43KG hot rolled steel rail for providing a clamping reaction point of the crawler.
Step 2: and carrying out stress analysis on the steel truss structure roof, and dividing the single steel truss structure roof 2 into two sections of steel truss structure roof units according to stress conditions.
The two sections of steel truss structure roof units of the standard exhibition hall respectively weigh 69 tons and 72 tons, and the lengths are 47m and 49m respectively. According to the actual condition of the site, 300 tons of crawler cranes are selected for hoisting, a crane adopts a main arm working condition, the length of the main arm is 43m, the working radius is 16m, and the rated hoisting capacity is 90.6 tons; the heaviest truss is segmented into 72 tons, the load rate is 79.5 percent less than 80 percent, and the hoisting requirement is met.
Step 3: and assembling two sections of steel truss structure roof units.
And in the construction stage of the standard exhibition hall, small unit assembly is carried out outside the field, then integral assembly is carried out in the field, and the steel truss structure roof units with 2 sections are subjected to tire discharging hoisting. When in off-site assembly, a truss assembly jig frame is erected on a flat site and is used for assembling roof units with steel truss structures at two ends; the original fertilizer groove at the truss assembly jig frame position needs to be fully backfilled and tamped. Truss assembly jig frame is provided with: the assembled jig frame base is formed by welding HW300, HW 10, HW15, HW250, HW 9, and HW 14, and the jig frame upright rod HW200, HW 8, 12, and diagonal brace HW150, 7, and HW250, 9, and 14. The 10m wide space is reserved in the middle of the jig frame, and the jig frame is mainly used for entering a safety channel in an exhibition hall.
The truss assembly jig frame assembled by the small units is a conventional assembly auxiliary facility of a steel truss in the field, and two sections of steel truss structure roof units are assembled according to a design drawing and a conventional method respectively, and are not repeated here.
Step 4: the middle supporting jig frame 1 and the pair of side supporting jig frames 4 are erected, the pair of side supporting jig frames 4 are respectively positioned in front of structural beam columns at two ends of the steel truss structure roof, the middle supporting jig frame 1 is positioned at the middle position of the pair of side supporting jig frames 4, and an operating platform 6 and an adjusting assembly are erected on the top of the middle supporting jig frame 1.
Specifically, a 321 bailey frame is used as a supporting bailey frame 301 to be erected, a base plate is used as a supporting base 302 for supporting the bottom of the bailey frame 301, a supporting top beam 303 is used as the top of the supporting bailey frame 301, two bailey Lei Jiajian are fixed by using 900 supporting frame bolts, the bottom of a middle supporting jig frame of a standard exhibition hall spans a concrete descending plate area, and HW150 x 7 x 10 section steel is used as the supporting base 302 and the supporting top beam 303 to be used as a conversion section. Temporary connection tie bars 304 are arranged between the bailey support frames, and wind-collecting ropes are arranged around the bailey support frames in a pulling mode.
The size of the operation platform 6 is 6 x 8m, the base of the operation platform 6 is HW300 x 10 x 15 section steel and is erected on the support bailey frame 301 of the middle support jig frame 1, and the periphery is surrounded with a fence. The operation platform 6 is provided with 6 supporting points and 4 anti-overturning supporting points, namely 6 adjusting supporting columns 701 and 4 anti-overturning supporting columns 702 of the adjusting assembly.
Step 5: the two sections of steel truss structure roof units are adjusted to be consistent in height on the operation platform 6 through the adjusting assembly, and are subjected to high-altitude butt joint assembly and welded fixation to form the Shangang truss structure roof 2.
Specifically, modeling software is adopted to perform simulation stress analysis, the positions of the lifting points are determined, and four-point lifting is adopted when assembly is finally determined. And hoisting the two sections of steel truss structure roof units onto the middle supporting jig frame 1 and the pair of side supporting jig frames 4, and providing support at the waist chord position by using four anti-overturning supporting upright posts 702 in the hoisting and positioning process, and welding and fixing the waist chord and the anti-overturning supporting upright posts 702 to ensure the supporting reliability.
The two sections of steel truss structure roof units are spliced in a high-altitude butt joint mode, and the operation difficulty is high, and mainly because the heights of the steel rod pieces of the two sections of steel truss structure roof units are difficult to control on the same plane. The height of the steel rod pieces can be finely and finely adjusted through the second jack 705 of the adjustable supporting upright post 701, so that the steel rod pieces of the two-section steel truss structure roof units are ensured to be consistent in height, the welding quality of the two-section steel truss structure roof units is improved, and the problems that the single steel truss structure roof 2 is deformed in structure, bent in dead weight and the like are avoided.
Step 6: the single steel truss structure roof 2 is slipped by adopting a mode of accumulated slipping and integral slipping.
The process of accumulating slip is as follows: after the assembly of the single steel truss structure roof 2 of the first truss is completed, integrally sliding the single steel truss structure roof 2 of the first truss; then the single steel truss structure roof 2 of the second truss is assembled, and a connecting beam 8 is connected between the single steel truss structure roof 2 of the first truss and the single steel truss structure roof 2 of the second truss; unloading and synchronously sliding a single steel truss structure roof 2 of the first truss and the second truss; then the single steel truss structure roof 2 of the third truss is assembled, and a connecting beam 8 is connected between the single steel truss structure roof 2 of the third truss and the single steel truss structure roof 2 of the second truss; unloading and synchronously sliding the single steel truss structure roof 2 of the first truss to the third truss; and by analogy, finishing the accumulated sliding of the single steel truss structure roof 2 of the previous N truss.
The whole sliding process is as follows: assembling the single steel truss structure roof 2 of the (n+1) th truss, and connecting a connecting beam 8 between the single steel truss structure roof 2 of the (n+1) th truss and the single steel truss structure roof 2 of the (N); and unloading and synchronously sliding the single steel truss structure roof 2 of the first truss to the N truss, and integrally sliding to the design position.
And repeating the process of accumulated sliding and integral sliding until the installation and the unloading of all the single steel truss structure roofs 2 are completed.
Preferably, the N value of the single steel truss structure roof 2 with accumulated slip can be adaptively adjusted according to the actual construction working condition, and preferably n=8.
Preferably, a hydraulic crawler in the prior art can be used as a sliding driving device to realize the process of accumulated sliding and integral sliding. The hydraulic crawler can adopt a combined structure, one end of the hydraulic crawler is connected with the rail through a wedge-shaped clamping block, the other end of the hydraulic crawler is connected with the side support jig frame 4 or a component in a hinged point mode, and the middle of the hydraulic crawler is driven to crawl through a hydraulic oil cylinder.
The wedge-shaped clamping block of the hydraulic crawler has a unidirectional self-locking effect. When the oil cylinder of the hydraulic crawler stretches out, the wedge-shaped clamping block works (clamps) and is automatically locked on the rail; when the oil cylinder of the hydraulic crawler is retracted, the clamping block does not work (is loosened) and moves in the same direction as the oil cylinder of the hydraulic crawler. The main working process is as follows:
step S1: the wedge-shaped clamping blocks of the clamping device of the hydraulic crawler are clamped with the rails, and the pin shafts of the piston rods at the front ends of the hydraulic cylinders of the hydraulic crawler are connected with the sliding members (or sliding shoes). The hydraulic cylinder of the hydraulic crawler extends to push the sliding member to slide forwards.
Step S2: the hydraulic cylinder of the hydraulic crawler extends for one stroke, so that the sliding component slides forward by 300mm.
Step S3: after one stroke is completed, the sliding component is not moved, the hydraulic cylinder of the hydraulic crawler contracts, so that the wedge-shaped clamping block in the clamping device is loosened from the rail, and the clamping device is dragged to slide forwards.
Step S4: and after one stroke cylinder shrinkage of the hydraulic crawler is finished, dragging the clamping device to slide forward for 300mm.
Step S5: and repeating the steps S1 to S5 until the sliding component slides to the final position.
Step 7: arching is unloaded.
Considering that after the integral assembly of the steel truss structure roof is completed, the steel truss structure roof is unloaded for the first time, the conditions of deflection of the steel truss structure roof and outward displacement of truss columns can occur, and the girder arch rising value and the truss column adduction value need to be considered in the deepening design.
The conventional arching unloading mode is adopted, namely, the bracket is converted, the support is used as a non-slip fulcrum, a 200t hydraulic jack is used for unloading, the unloading safety is ensured, and the main process is as follows:
step A1: and after the steel truss structure roof slides in place, stopping the hydraulic crawler.
Step A2: and (3) removing the track between the hydraulic crawler and the two sliding shoes, and polishing the pressed welding slag on the embedded plate.
Step A3: and installing a jack on the pressing sheet, and marking an axis on the truss column and the embedded part plate.
Step A4: and (5) jacking the bracket by using a jack, jacking the steel truss structure roof by 10mm, and cutting the track at the lower part of the bracket.
Step A5: and translating the support to the position of the cross axis at the top of the truss column, measuring the support by using a guiding rule, and fine-adjusting the support to align the support axis with the truss column axis.
Step A6: and spot welding the code plate on the embedded part plate to temporarily fix the support.
Step A7: the two ends of the steel truss structure roof are simultaneously jacked up by using hydraulic jacks, and unloading is carried out after the lower track of the sliding shoe is removed until the jacks are separated from the corbels; meanwhile, the deviation of the support and the axis of the concrete column is checked, and when the deviation is larger than 30mm, the deviation is timely fed back to a construction design department.
Step A8: after the sliding shoes are removed, welding the welding seams of the support and the truss column, and then welding the welding seams of the support and the embedded part plate.
Arching unloading is a conventional construction process in the art and is not described in detail herein.
The foregoing description of the preferred embodiments of the invention is not intended to limit the scope of the invention, and therefore, any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A bed-jig braced system for steel construction slides, characterized by: comprises a middle supporting jig frame (1), side supporting jig frames (4), an operation platform (6) and an adjusting component; a pair of side support jig frames (4) are respectively erected on the bottom plate, and the pair of support jig frames (4) are respectively positioned in front of structural beam columns (5) at two ends of the steel truss structure roof; the middle supporting jig frame (1) is erected on the bottom plate and is positioned between the pair of side supporting jig frames (4), and the operating platform (6) is arranged at the top of the middle supporting jig frame (1); the bottoms of the outer ends of the two sections of steel truss structure roof units are respectively arranged on a pair of supporting jig frames (4), an adjusting assembly is arranged on an operating platform (6) and can be adjustably supported on the bottoms of the inner ends of the two sections of steel truss structure roof units, so that the inner ends of the two sections of steel truss structure roof units are spliced on the operating platform (6) to form a single steel truss structure roof (2); the steel truss structure roofs (2) of a plurality of single steel truss structures are connected into the steel truss structure roofs through connecting beams (8), and the steel truss structure roofs slide onto the structural beam columns (5).
2. A jig frame support system for steel structure slippage as claimed in claim 1 wherein: the middle supporting jig frame (1) and the side supporting jig frames (4) comprise supporting bailey frames (301), supporting bases (302) and supporting top beams (303); the support bailey frames (301) are respectively arranged at intervals, the bottom of each support bailey frame (301) is erected on the bottom plate through a support base (302), and the top of each support bailey frame (301) is provided with a support top beam (303); the operation platform (6) is erected on supporting top beams (303) at the tops of a plurality of supporting bailey frames (301) of the middle supporting jig frame (1), and the bottoms of the outer ends of the two sections of steel truss structure roof units are respectively arranged on the supporting top beams (303) at the tops of a plurality of supporting bailey frames (301) of the pair of side supporting jig frames (4).
3. A jig frame support system for steel structure slippage as claimed in claim 2 wherein: two adjacent support bailey frames (301) are connected through a temporary connection tie bar (304), and the temporary connection tie bars (304) are arranged in a plurality of channels at intervals along the height direction of the support bailey frames (301); cable ropes are obliquely arranged between two sides of the support bailey frame (301) and the bottom plate.
4. A jig frame support system for steel structure slippage as claimed in claim 2 wherein: the supporting top beam (303) at the top of the side supporting jig frame (4) is provided with a first jack (401), and the top extension end of the first jack (401) props against the bottom of the connecting beam (8).
5. A jig frame support system for steel structure slippage as claimed in claim 1 wherein: the adjusting assembly comprises adjusting type supporting columns (701) and anti-overturning supporting columns (702), wherein a plurality of adjusting type supporting columns (701) are respectively arranged on the operating platform (6) at intervals, and the adjusting type supporting columns (701) are respectively propped against the bottoms of steel rod pieces at the inner ends of two sections of steel truss structure roof units; the anti-overturning support columns (702) are arranged on the operation platform (6) in pairs, and each pair of anti-overturning support columns (702) correspondingly prop against the bottoms of the two sections of steel truss structure roof units respectively.
6. The jig frame support system for steel structure slippage of claim 5 wherein: the adjustable supporting upright post (701) comprises an upright post base (703), a limiting clamping seat (704), a second jack (705) and a bracket head (706); the lower end of the upright post base (703) is fixedly arranged on the operation platform (6), and the limit clamping seat (704) is fixedly arranged at the upper end of the upright post base (703); the bottom of the second jack (705) is embedded in the limit clamping seat (704) in a matching way, the top extending end of the second jack (705) is connected with the bracket head (706), and the steel rod piece of the steel truss structure roof unit is embedded in the bracket head (706).
7. The jig frame support system for steel structure slippage of claim 5 wherein: the anti-overturning support columns (702) are distributed around the outer sides of the adjusting support columns (701), and the anti-overturning support columns (702) are supported on waist chords of the steel truss structure roof units.
8. A method of constructing a steel structure employing the jig frame support system for steel structure slippage of claim 1, characterized by: the method comprises the following steps:
step 1: the mounting rail, the embedded plate and the pressing plate;
step 2: carrying out stress analysis on the steel truss structure roof, and dividing the single steel truss structure roof (2) into two sections of steel truss structure roof units according to stress conditions;
step 3: assembling two sections of steel truss structure roof units;
step 4: the method comprises the steps of erecting a middle supporting jig frame (1) and a pair of side supporting jig frames (4), wherein the middle supporting jig frame (1) is positioned at the middle position of the pair of side supporting jig frames (4), and erecting an operation platform (6) and an adjusting assembly at the top of the middle supporting jig frame (1);
step 5: the two sections of steel truss structure roof units are adjusted to be consistent in height through an adjusting assembly on an operating platform (6), and are subjected to high-altitude butt joint assembly and welded fixation to form a Shangang truss structure roof (2);
step 6: sliding the single steel truss structure roof (2) in a mode of accumulated sliding and integral sliding;
step 7: arching is unloaded.
9. The steel structure construction method according to claim 8, characterized in that: the process of accumulated slip is as follows: after the assembly of the single steel truss structure roof (2) of the first truss is completed, integrally sliding the single steel truss structure roof (2) of the first truss; then the single steel truss structure roof (2) of the second truss is assembled, and a connecting beam (8) is connected between the single steel truss structure roof (2) of the first truss and the single steel truss structure roof (2) of the second truss; unloading and synchronously sliding a single steel truss structure roof (2) of the first truss and the second truss; then the single steel truss structure roof (2) of the third truss is assembled, and a connecting beam (8) is connected between the single steel truss structure roof (2) of the third truss and the single steel truss structure roof (2) of the second truss; unloading and synchronously sliding a single steel truss structure roof (2) of the first truss to the third truss; and by analogy, finishing the accumulated sliding of the single steel truss structure roof (2) of the previous N truss.
10. The steel structure construction method according to claim 8, characterized in that: the whole sliding process comprises the following steps: assembling the single steel truss structure roof (2) of the (n+1) th truss, and connecting a connecting beam (8) between the single steel truss structure roof (2) of the (n+1) th truss and the single steel truss structure roof (2) of the (N); and unloading and synchronously sliding the single steel truss structure roof (2) of the first truss to the N truss, and integrally sliding to the design position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311299345.7A CN117145268A (en) | 2023-10-09 | 2023-10-09 | Jig frame supporting system for steel structure sliding and steel structure construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311299345.7A CN117145268A (en) | 2023-10-09 | 2023-10-09 | Jig frame supporting system for steel structure sliding and steel structure construction method |
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| CN117145268A true CN117145268A (en) | 2023-12-01 |
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| CN202311299345.7A Pending CN117145268A (en) | 2023-10-09 | 2023-10-09 | Jig frame supporting system for steel structure sliding and steel structure construction method |
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| CN (1) | CN117145268A (en) |
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- 2023-10-09 CN CN202311299345.7A patent/CN117145268A/en active Pending
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