CN112796528B - Construction method for high-altitude in-situ splicing of large-span steel truss - Google Patents
Construction method for high-altitude in-situ splicing of large-span steel truss Download PDFInfo
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- CN112796528B CN112796528B CN202110201402.8A CN202110201402A CN112796528B CN 112796528 B CN112796528 B CN 112796528B CN 202110201402 A CN202110201402 A CN 202110201402A CN 112796528 B CN112796528 B CN 112796528B
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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
- 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
- E04G21/142—Means in or on the elements for connecting same to handling apparatus
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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
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/14—Railings
- E04G5/144—Railings specific for the lateral, i.e. short side of a scaffold
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Abstract
本发明公开了一种大跨度钢桁架高空原位拼装的施工方法，先在待拼装钢桁架下方搭设满堂支撑架；然后在满堂支撑架上搭设操作平台；再依次将钢桁架节段吊装至操作平台上，最后整体拼装各钢桁架节段即可；操作平台包括支撑单元，所述支撑单元由若干根横梁和铺设于横梁上的两条走道构成，每根横梁与钢桁架纵向垂直且所有横梁沿钢桁架纵向间隔设置，两条走道沿钢桁架纵向可拆卸设置在横梁上且两条走道之间间隔一定距离，从而在横梁上形成间隔槽，用于放置待拼装钢桁架；在搭设操作平台之前，先在每根横梁两端对应的两根满堂支撑架立杆的顶端设置可调U形顶托，横梁放置在U形顶托内。该施工方法采用的操作平台安装和拆卸方便，能有效提高工作效率。
The invention discloses a construction method for high-altitude in-situ assembly of large-span steel trusses. First, a full-floor support frame is set up under the steel truss to be assembled; then an operation platform is set up on the full-floor support frame; On the platform, each steel truss segment can be assembled as a whole; the operation platform includes a support unit, which consists of several beams and two walkways laid on the beams, each beam is vertical to the steel truss longitudinally and all beams The two walkways are arranged at intervals along the longitudinal direction of the steel truss, and the two walkways are detachably arranged on the beam along the longitudinal direction of the steel truss, and there is a certain distance between the two walkways, so as to form a spacing groove on the cross beam for placing the steel truss to be assembled; Before, the adjustable U-shaped top brackets were set at the tops of the two full-house support frame poles corresponding to both ends of each beam, and the beams were placed in the U-shaped top brackets. The operation platform adopted by the construction method is convenient to install and disassemble, and can effectively improve the work efficiency.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a construction method for high-altitude in-situ splicing of a large-span steel truss.
Background
At present, a atrium daylighting roof design is generally adopted in some large public buildings, namely, a large-span steel structure roof truss and a daylighting panel (glass) structure are arranged in the center of a building, and because the large-span steel structure roof truss is heavy in weight, large in hoisting radius and limited in site, large hoisting equipment cannot drive in, an integral hoisting method cannot be adopted, a full-hall support frame needs to be erected, a method for high-altitude in-situ bulk loading is carried out by using a tower crane, the hoisting capacity of the tower crane is small and is generally less than 5 tons, therefore, the large-span steel structure roof truss needs to be hoisted in sections firstly and then assembled at high altitude, an operation platform needs to be erected on the full-hall support frame for high-altitude assembly, a bamboo springboard is paved on the full-hall support frame as the existing method, the operation platform is troublesome to install and disassemble, and the working efficiency is low.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the construction method for the high-altitude in-situ splicing of the large-span steel truss, the operation platform adopted by the construction method is convenient to mount and dismount, and the working efficiency can be effectively improved.
The technical scheme of the invention is realized as follows:
a construction method for high-altitude in-situ assembly of a large-span steel truss comprises the steps of firstly, erecting a full-space support frame below a steel truss to be assembled, wherein the full-space support frame is composed of a plurality of vertical rods, cross rods and inclined rods; then, an operation platform is erected on the full-hall supporting frame; hoisting the steel truss sections to an operation platform in sequence, and finally integrally assembling all the steel truss sections; the operation platform comprises a supporting unit, the supporting unit is composed of a plurality of cross beams and two walkways paved on the cross beams, each cross beam is vertical to the longitudinal direction of the steel truss, all the cross beams are longitudinally arranged at intervals along the steel truss, the two walkways are longitudinally detachably arranged on the cross beams along the steel truss, and a certain distance is reserved between the two walkways, so that a spacing groove is formed on the cross beams and used for placing the steel truss to be assembled; before an operation platform is set up, an adjustable U-shaped jacking is arranged on the top ends of two full-hall support frame vertical rods corresponding to two ends of each cross beam, a notch of each U-shaped jacking is arranged upwards and transversely along a steel truss, then the cross beams are placed in the U-shaped jacking, two walkways are laid on the cross beams, and the U-shaped jacking is adjusted to enable the steel trusses to be assembled to be located at the installation height.
Furthermore, the cross beams are made of channel steel, and the notch of each cross beam is downwards placed in the corresponding two U-shaped jacking supports; each walkway is composed of a plurality of walkway plates, and each walkway plate is arranged between two adjacent cross beams and is detachably fixed on the corresponding two cross beams.
Further, every walk the guidance tape and fix on two crossbeams that correspond through setting up two first connecting pieces in the interval groove side, first connecting piece comprises the horizontal plate that the level set up and the vertical board of vertical setting in the horizontal plate top, thereby form T shape structure, first connecting piece horizontal plate passes through the bolt fastening on the crossbeam that corresponds, walk and be equipped with the lug that corresponds with the vertical board of two first connecting pieces on the guidance tape, the lug bolted connection on the guidance tape is walked to the vertical board of first connecting piece and two adjacent, thereby will walk the guidance tape and fix on the crossbeam.
Furthermore, a plurality of square pipe ribs are uniformly distributed between each walkway plate and the corresponding two cross beams, and each square pipe rib is longitudinally arranged along the steel truss and is flush with the two ends of the corresponding walkway plate.
Furthermore, including the protection unit, the protection unit has two and sets up in the support element both sides along steel truss is longitudinal respectively.
Furthermore, the protection unit comprises a plurality of vertical rods and two steel wire ropes, the vertical rods are vertically arranged on the cross beam, and the two steel wire ropes are horizontally arranged on the vertical rods at intervals.
Furthermore, a skirting board is arranged between two adjacent vertical rods, the skirting board is arranged in a side-standing mode, the lower end of the skirting board is located on the upper surface of the walkway, two connecting plates are arranged on the vertical rods, the planes where the two connecting plates are located are parallel to the skirting board, and two ends of the skirting board are respectively connected with the corresponding connecting plates through bolts.
Furthermore, the vertical rod is detachably arranged on the cross beam through the second connecting piece, the lower end of the vertical rod is fixed to the second connecting piece, and the second connecting piece is connected with the corresponding cross beam through bolts, so that the vertical rod is fixed to the cross beam.
Further, every montant is carried on the back by two angle steels and is set up, and the second connecting piece comprises the horizontal plate that the level set up and the vertical board of vertical setting in the horizontal plate top to form T shape structure, the horizontal plate and the crossbeam bolt fastening of second connecting piece, a straight flange of two angle steels is located the coplanar and vertically is parallel with the steel truss, another straight flange of two angle steels presss from both sides the vertical board of second connecting piece in the centre and fixed with vertical board respectively.
Further, be equipped with the shrouding on the top of montant, the shrouding comprises the horizontal plate that the level set up and the vertical board of vertical setting in the horizontal plate below to form T shape structure, the vertical board clamp of shrouding is established in the middle of a straight side of two angle steel, and the horizontal plate four sides edge of shrouding is respectively with the rectangle four sides parallel and level that two angle steel formed.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with the mode of paving the bamboo gangplank on the full-hall supporting frame, all nodes of the operating platform are fixed by bolts and can be used as a standardized sizing tool, so that the operating platform can be repeatedly used, overhead welding and cutting operation can be reduced, and the operating platform conforms to the advocation concept of green construction.
2. The operation platform is convenient to mount and dismount, the working efficiency can be effectively improved, meanwhile, the safety of workers during high-altitude operation can be effectively guaranteed due to the arrangement of the protection unit, and the safety coefficient is effectively improved.
Drawings
Fig. 1-schematic structural view of the operation platform.
Fig. 2-structural schematic diagram of the operating platform in use.
Wherein: 1-a cross beam; 2-vertical rod; 3-a walkway plate; 4-a first connector; 5-skirting board; 6-steel wire rope; 7-a connecting plate; 8-a second connector; 9-square tube ribs; 10-closing the plate; 11-steel truss.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, a construction method for high-altitude in-situ assembly of a large-span steel truss includes the steps that a full-space support frame is firstly erected below a steel truss 11 to be assembled, and the full-space support frame is composed of a plurality of vertical rods, cross rods and inclined rods; then, an operation platform is erected on the full-hall supporting frame; hoisting the steel truss sections to an operation platform in sequence, and finally integrally assembling all the steel truss sections; the operation platform comprises a supporting unit, wherein the supporting unit is composed of a plurality of cross beams 1 and two walkways paved on the cross beams 1, each cross beam 1 is vertical to the longitudinal direction of the steel truss, all the cross beams 1 are arranged at intervals along the longitudinal direction of the steel truss, the two walkways are detachably arranged on the cross beams along the longitudinal direction of the steel truss 11, and a certain distance is reserved between the two walkways, so that a spacing groove is formed on each cross beam and used for placing the steel truss 11 to be assembled; before an operation platform is set up, an adjustable U-shaped jacking is arranged at the top ends of two full-hall support frame vertical rods corresponding to two ends of each cross beam 1, a notch of the U-shaped jacking is upwards arranged and transversely arranged along a steel truss 11, then the cross beam 1 is placed in the U-shaped jacking, two walkways are laid on the cross beam, and the U-shaped jacking is adjusted to enable the steel truss to be assembled to be located at the installation height.
Through setting up the U-shaped top support on the top of full hall support frame pole setting, just can set up operating platform in full hall support frame top to through adjusting the U-shaped top support make the steel truss of hoist and mount assemble the back on operating platform and install promptly and target in place, realize the normal position and assemble.
When setting up full hall support frame, need consider steel truss mounted position to guarantee that the interval groove that is used for placing the steel truss is located the support unit in the middle of, in order to improve operation platform's structural stability.
In order to ensure the safety of the structure, the two ends of each cross beam extend out of the corresponding U-shaped jacking to be not less than 200 mm.
In order to improve the safety factor, the erected support frame is a disc buckle type support system. Meanwhile, in order to improve the structural stability, an adjustable U-shaped jacking support can be arranged on the vertical rod corresponding to the middle part of the cross beam so as to support the cross beam.
In specific implementation, the cross beams 1 are made of channel steel, and the notch of each cross beam 1 is downwards placed in the corresponding two U-shaped jacking supports; each walkway is composed of a plurality of walkway plates 3, and each walkway plate 3 is arranged between two adjacent cross beams 1 and is detachably fixed on the corresponding two cross beams 1.
In the present embodiment, the walkway plates are made of delta =5mm pattern steel plates, and each walkway plate has a size of 1.2m × 0.8 m.
During the concrete implementation, every walk guidance tape 3 and fix on two crossbeams 1 that correspond through setting up two first connecting pieces 4 in the interval groove side, first connecting piece 4 comprises the horizontal plate that the level set up and the vertical board that sets up in the horizontal plate top, thereby form T shape structure, first connecting piece 4 horizontal plate passes through the bolt fastening on the crossbeam 1 that corresponds, walk and be equipped with the lug that corresponds with two first connecting piece 4 vertical boards on the guidance tape 3, the lug bolted connection on first connecting piece 4 vertical board and the two adjacent guidance tapes 3, thereby will walk guidance tape 3 and fix on crossbeam 1.
Therefore, the two lifting lugs are arranged on the walkway plate and can be used for lifting the walkway plate and also serve as a connecting piece connected with the first connecting piece. A lug in the outer side of each walkway plate positioned at two ends in each walkway is connected with the first connecting piece through a bolt, and a lug in the inner side and a lug on the adjacent walkway plate are simultaneously connected with the same first connecting piece, so that the walkway plates are convenient to disassemble and assemble, and the first connecting pieces are also convenient to disassemble from the cross beam.
During specific implementation, a plurality of square pipe ribs 9 are uniformly distributed between each walkway plate 3 and the corresponding two cross beams, and each square pipe rib 9 is longitudinally arranged along the steel truss 11 and is flush with the two ends of the corresponding walkway plate 3.
In this embodiment, three square pipe ribs are arranged below each walkway plate to support the walkway plate and improve the structural strength of the walkway plate.
When the concrete implementation, including the protection unit, the protection unit has two and vertically sets up in the support element both sides along steel truss 11 respectively.
The safety of workers during high-altitude operation can be guaranteed by arranging the protection unit, and the safety coefficient is improved.
During specific implementation, the protection unit comprises a plurality of vertical rods 2 and two steel wire ropes 6, the vertical rods 2 are vertically arranged on the cross beam 1, and the two steel wire ropes 6 are horizontally arranged on the vertical rods 2 at intervals.
This is one of them implementation mode of protective unit, does not need all to set up the montant on every crossbeam, can set up a montant by a crossbeam of interval, as long as can play the guard action can. In fig. 1, each beam is provided with a vertical rod.
The steel wire rope has higher tensile strength and toughness, is stretched along the walking direction, is tensioned to be in a horizontal state, and the two ends of the steel wire rope are fixed on the vertical rods at the head end and the tail end through buckles, so that the effects of edge protection and life line attachment of the safety belt are achieved.
When the concrete implementation, be equipped with baseboard 5 between two adjacent montants 2, baseboard 5 sets up and baseboard 5 lower extreme is located the pavement upper surface on the side, is equipped with two connecting plates 7 on montant 2, and two connecting plates 7 place plane is parallel with baseboard 5, and baseboard 5 both ends respectively with corresponding connecting plate 7 bolted connection.
Set up behind the baseboard like this and can prevent to place splicing tool etc. on the pavement and drop to the baseboard is convenient to be dismantled and the installation, thereby can used repeatedly.
During specific implementation, montant 2 can be dismantled through second connecting piece 8 and set up on crossbeam 1, and the montant lower extreme is fixed with second connecting piece 8, second connecting piece 8 with correspond 1 bolted connection of crossbeam to fix montant 2 on crossbeam 1.
Therefore, the vertical rod can also be detachably and fixedly arranged on the cross beam, so that the mounting and the dismounting are convenient, and the repeated use can be realized.
During specific implementation, every montant 2 is set up by two angle steels side by side, and second connecting piece 8 comprises the horizontal plate that the level set up and the vertical board of vertical setting in the horizontal plate top to form T shape structure, the horizontal plate of second connecting piece 8 and 1 bolt fastening of crossbeam, a straight side of two angle steels is located the coplanar and vertically is parallel with steel truss 11, another straight side of two angle steels presss from both sides the vertical board of second connecting piece 8 in the middle of establishing and respectively with vertical board welded fastening.
During specific implementation, be equipped with shrouding 10 on montant 2's top, shrouding 10 comprises the horizontal plate that the level set up and the vertical board of vertical setting in the horizontal plate below to form T shape structure, shrouding 10's vertical board clamp is established in the middle of a straight side of two angle irons, shrouding 10's horizontal plate four sides edge respectively with the rectangle four sides parallel and level that two angle irons formed.
Finally, it should be noted that the above-mentioned examples of the present invention are only examples for illustrating the present invention, and are not intended to limit the embodiments of the present invention. Variations and modifications in other variations will occur to those skilled in the art upon reading the foregoing description. Not all embodiments are exhaustive. All obvious changes and modifications of the present invention are within the scope of the present invention.
Claims (10)
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| CN113266157B (en) * | 2021-05-21 | 2022-02-25 | 五冶集团上海有限公司 | Installation method of steel structure corridor walkway plate |
| CN113309004B (en) * | 2021-06-22 | 2022-12-13 | 中铁大桥局第七工程有限公司 | Assembled high-altitude walkway for arched bridge |
| CN114033146B (en) * | 2021-11-19 | 2022-12-20 | 中交第三航务工程局有限公司 | Method for erecting high-altitude electromechanical engineering construction platform in large-scale studio |
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| JP2000351562A (en) * | 1999-06-08 | 2000-12-19 | Toshiba Elevator Co Ltd | Working scaffold for escalator |
| JP2002356988A (en) * | 2001-06-01 | 2002-12-13 | Toyo Chem Co Ltd | Scaffold |
| JP4120515B2 (en) * | 2003-07-16 | 2008-07-16 | 鹿島建設株式会社 | Horizontal displacement restraint device for superstructure in seismic isolation structure |
| CA2523179A1 (en) * | 2004-10-12 | 2006-04-12 | Safway Services, Inc. | Walk-through scaffold and hoist frame |
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Address after: No.39-1 Jianshe Avenue, Banan District, Chongqing 400054 Patentee after: MCC Chongqing Construction Industry Co.,Ltd. Address before: No.39-1 Jianshe Avenue, Banan District, Chongqing 400054 Patentee before: Chongqing Steel Structure Co., Ltd. of China Metallurgical Construction Engineering Group |