CN109989590B - Auxiliary fixing device for mounting roof overlong steel beam and hoisting method of steel beam - Google Patents

Auxiliary fixing device for mounting roof overlong steel beam and hoisting method of steel beam Download PDF

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Publication number
CN109989590B
CN109989590B CN201910278312.1A CN201910278312A CN109989590B CN 109989590 B CN109989590 B CN 109989590B CN 201910278312 A CN201910278312 A CN 201910278312A CN 109989590 B CN109989590 B CN 109989590B
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steel beam
beam section
top layer
fixing
supporting upright
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CN109989590A (en
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张秀川
朱明华
李卓文
耿东各
袁庆龙
林佐江
喻鹏
张天宇
张帅
李广大
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China Construction First Group Construction and Development Co Ltd
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China Construction First Group Construction and Development Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14Conveying or assembling building elements
    • E04G21/16Tools or apparatus
    • E04G21/162Handles to carry construction blocks

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

The invention relates to the technical field of building steel girder installation, and discloses an auxiliary fixing device for roof overlong steel girder installation and a steel girder hoisting method. The invention is detachably arranged on a top layer structural plate and is used for fixing a lifted short steel beam section, one end of the short steel beam section is fixedly connected with an upper return beam through an anchor bolt, and the upper surface of the other end of the short steel beam section is respectively connected with a temporary pull-fixing assembly and an inclined stay pull-fixing rod; the bottom of the supporting upright post is fixed with the top layer structural plate through the combined base; the top end of the first diagonal brace is connected with the top of the supporting upright post, the bottom end of the first diagonal brace is connected with the top layer structural plate, and the vertical face formed by encircling the first diagonal brace, the supporting upright post and the top layer structural plate is positioned in the same plane with the ultra-long steel beam; one end of the temporary pulling and fixing component is connected with the top of the supporting upright post, and the other end of the temporary pulling and fixing component is connected with the upper surface of the short steel beam section; the diagonal bracing pull fixing rod is positioned below the temporary pull fixing assembly and is arranged in parallel with the temporary pull fixing assembly. The invention has simple structure, can be disassembled for repeated use, occupies small space and reduces the using quantity of the tower cranes.

Description

Auxiliary fixing device for mounting roof overlong steel beam and hoisting method of steel beam
Technical Field
The invention relates to the technical field of building steel girder installation, in particular to an auxiliary fixing device for roof overlong steel girder installation and a steel girder hoisting method.
Background
With the progress of construction technology, building structures are increasingly diversified in form, and steel structures, steel structures and concrete structures are increasingly widely combined. The section steel is a beam and column structure and is used for a novel large-scale public building with the characteristics of large span, high layer height, large span change of high and low, and the like, and has the advantages of lighter dead weight, convenience and high efficiency in construction, and the like.
However, the traditional steel beam installation method is generally to directly hoist through a tower crane, but for the overlong steel beam with the length exceeding 15m, the transportation and hoisting difficulties are relatively high, the hoisting weight of the tower crane and the weight limit of the steel beam are comprehensively considered, the steel beam is hoisted by adopting a plurality of tower cranes at the same time, a plurality of tower crane devices are required to be prepared on site at the same time, the construction workload of installing and dismantling a tower crane foundation and the tower crane is high, the construction cost is greatly improved, and the arrangement of the plurality of tower cranes has relatively great influence on the design and arrangement of a construction site, so that the difficulty of construction design is increased.
Disclosure of Invention
The auxiliary fixing device for mounting the roof overlong steel beam and the steel beam hoisting method are simple in structure, capable of being detached and reused, small in occupied space and capable of reducing the number of used tower cranes.
The technical problems to be solved are as follows: the existing ultra-long steel beam is installed by adopting a plurality of tower cranes to cooperate and hoist simultaneously, the number of the tower cranes is excessive, the site turnover flexibility is poor, the construction workload is large, the difficulty is high, the cost is high, and the occupied construction period is long.
In order to solve the technical problems, the invention adopts the following technical scheme:
the auxiliary fixing device for installing the roof overlong steel beam is detachably arranged on a top layer structural plate and is used for temporarily fixing a lifted short steel beam section, and comprises a supporting upright post, a first diagonal bracing rod, a temporary pull-fixing assembly and a diagonal bracing pull-fixing rod; one end of the short steel beam section is fixedly connected with the upper return beam through an anchor bolt, and the upper surface of the other end is respectively connected with the temporary pull-fixing assembly and the diagonal bracing pull-fixing rod;
the support upright posts are attached to the inner side walls of the upper return beams of the roof, and the bottom of the support upright posts is fixed with the top layer structural plate through the combined base;
the top end of the first diagonal brace is detachably connected with the top of the supporting upright post, the bottom end of the first diagonal brace is detachably connected with a third embedded part, the third embedded part is positioned on a structural beam of the top layer structural plate, and a vertical face formed by encircling the first diagonal brace, the supporting upright post and the top layer structural plate and the overlength steel beam are positioned in the same plane;
the temporary pulling and fixing assembly comprises a chain block and a steel wire rope, one end of the chain block is detachably connected with the top of the supporting upright post, and the other end of the chain block is detachably connected with the upper surface of the short steel beam section through the steel wire rope;
the bracing draws solid pole to be located temporary and draws solid subassembly below, with temporary drawing solid subassembly parallel arrangement, top and support post detachable connection, bottom and short girder steel section upper surface detachable connection.
The invention relates to an auxiliary fixing device for installing a roof overlong steel beam, which further comprises a long steel beam section, wherein the length ratio of the short steel beam section to the long steel beam section is 1:3-4.
The invention relates to an auxiliary fixing device for installing a roof overlong steel beam, which further comprises a second diagonal brace, wherein the top end of the second diagonal brace is detachably connected with the top of a supporting upright post, the bottom end of the second diagonal brace is detachably connected with a top layer structure plate, and a vertical face formed by encircling the second diagonal brace, the supporting upright post and the top layer structure plate is mutually perpendicular to a vertical face formed by encircling the first diagonal brace, the supporting upright post and the top layer structure plate.
The auxiliary fixing device for installing the roof overlong steel beam is further characterized in that the combined base is of a cuboid steel structure, is fixed with the top layer structural plate through the first embedded part, and is fixed with the upper return beam of the top layer structural plate through the second embedded part.
The auxiliary fixing device for mounting the roof overlong steel beam is further characterized in that the depth of the first embedded part embedded into the top layer structural plate is not smaller than 100mm, and the depth of the second embedded part embedded into the upper return beam is not smaller than 300mm.
The invention relates to an auxiliary fixing device for installing a roof overlong steel beam, which is characterized in that the first diagonal brace is H-shaped steel, and the included angle between the first diagonal brace and a top layer structural plate is 30-60 degrees.
The auxiliary fixing device for installing the roof overlong steel beam is further characterized in that the inclined stay pull fixing rod is H-shaped steel, and an included angle between the inclined stay pull fixing rod and the short steel beam section is 30-60 degrees.
The auxiliary fixing device for mounting the roof overlong steel beam is further characterized in that the supporting upright post is H-shaped steel, and the height of the supporting upright post is not more than 6m.
The invention relates to an auxiliary fixing device for installing a roof overlong steel beam, which is further characterized in that the bottom of a supporting upright post is provided with a sealing plate, the sealing plate is detachably fixed with a combined base through a bolt, and the bolt is an M22 high-strength bolt.
The hoisting method of the steel beam is characterized by comprising the following steps of: the method comprises the following steps:
step one, segmentation of an ultra-long steel beam: carrying out sectional prefabrication on the ultra-long steel beam according to factors such as the weight of the tower crane, the length and the dead weight of the steel beam, the bearing capacity of the auxiliary fixing device, the connection mode of sectional connection nodes of the steel beam and the like;
step two, setting an embedded part: according to the construction design requirement, determining the setting position of each embedded part, installing the embedded parts during the civil construction of the foundation structure, and carrying out retesting and adjustment;
step three, installing an auxiliary fixing device: setting a combined base, connecting and fixing a supporting upright post and the combined base, then installing a first diagonal brace, and setting a temporary pulling and fixing assembly on the supporting upright post;
step four, hanging and adjusting a short steel beam section: lifting the short steel beam section by using tower crane equipment, fixing one end of the short steel beam section on an upper return beam, connecting the other end of the short steel beam section with a temporary pulling and fixing assembly, and adjusting the levelness of the short steel beam section through a chain block;
step five, temporarily fixing the short steel beam section: after the short steel beam section reaches a preset position, a diagonal bracing pull fixing rod is arranged, the short steel beam section is fixed with an auxiliary fixing device, a temporary fixing device is removed, and tower crane equipment is removed;
step six, hoisting the long steel beam section: and lifting the long steel beam section to a construction position by using tower crane equipment, aligning with the short steel beam section after adjusting the position, performing high-altitude in-situ welding, completing the installation of the ultra-long steel beam, and removing the auxiliary fixing device after cooling.
Compared with the prior art, the auxiliary fixing device for mounting the roof overlong steel beam and the hoisting method of the steel beam have the following beneficial effects:
the auxiliary fixing device for mounting the roof overlong steel beam has the advantages of simple structure, detachable connection with the embedded part on the foundation structure, small mounting and dismounting difficulty, few working procedures and high construction efficiency. The stable framework is formed by the support upright posts and the diagonal brace, a section of steel beam overhanging the tower crane equipment is replaced by temporarily fixing, the liberated tower crane can be used for hoisting another section of steel beam, the demand of construction on the tower crane equipment is reduced, the construction workload is greatly reduced, and the construction cost is reduced.
The auxiliary fixing device of the invention takes the supporting upright rod as a main drawing component, and simultaneously is matched with the first inclined strut and the second inclined strut to draw and fix the supporting upright rod from two directions which are mutually perpendicular and the lateral direction, thereby having strong stability, good bearing capacity and high safety coefficient; and the auxiliary fixing device is detachably connected with the top layer structural plate and the upper return beam, so that the auxiliary fixing device can be detached for reuse, has good site turnover flexibility, and reduces construction cost.
According to the invention, the ultra-long steel beam is divided into two sections with different lengths by using the steel beam hoisting method of the auxiliary fixing device, so that the self weight of the hoisted steel beam section is reduced, the problem of high hoisting difficulty of the whole large steel beam is solved, the tower crane equipment with large hoisting weight is not needed for a small amount of heavy components, the construction cost is reduced, the transportation difficulty of the ultra-long steel beam is greatly reduced, and the stacking and the transporting are easier to operate.
The auxiliary fixing device for installing the roof overlong steel beam and the hoisting method of the steel beam are further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of the auxiliary fixture for roof super long steel girder installation of the present invention;
FIG. 2 is a side view of the auxiliary fixture of the present invention for roof super long steel girder installation;
fig. 3 is a schematic view of the construction state of the step six.
Reference numerals:
1-supporting upright posts; 2-a first diagonal brace; 3-a second diagonal brace; 4-bracing a pull rod; 51-chain block; 52-wire rope; 61-short steel girder segments; 62-long steel girder segments; 71-top layer structural panel; 72-upward return beam; 73-structural beams; 81-a first embedded part; 82-a second embedded part; 83-a third embedded part; 84-anchor bolts; 9-combination base.
Detailed Description
As shown in fig. 1 and 2, the auxiliary fixing device for installing the roof super-long steel beam of the present invention is detachably installed on the top structural plate 71, and is used for temporarily fixing the lifted short steel beam section 61, and comprises a support column 1, a first diagonal bracing 2, a second diagonal bracing 3, a temporary pulling and fixing assembly and diagonal bracing pulling and fixing rods 4, wherein each super-long steel beam is correspondingly provided with a set of auxiliary fixing devices.
The super-long steel beam is used for determining the segmentation position of the super-long steel beam according to the lifting weight of the tower crane, the bearing capacity of the auxiliary fixing device and the dead weight of the steel beam, and the super-long steel beam is generally segmented at the position of 1/4-1/3 of the super-long steel beam, and is divided into a short steel beam section 61 and a long steel beam section 62; after the short steel beam section 61 is fixed by the auxiliary fixing device, a tower crane device is released to hoist the long steel beam section 62, and then the long steel beam section 62 and the short steel beam section 61 are connected at high altitude, so that the installation of the ultra-long steel beam is completed.
Or according to the construction condition, the long steel beam section 62 is installed firstly, the auxiliary fixing device is adopted for fixing, then the short steel beam section 61 is lifted, and high-altitude butt joint fixing is carried out with the long steel beam section 62.
The support column 1 is an H-shaped steel, and is used as a pulling rod for fixing the short steel beam section 61, in this embodiment, the H-shaped steel with HW200 x 8 x 12 is used, the inner side wall of the return beam 72 on the roof is attached, and the bottom is fixed with the top layer structural plate 71 through the combined base 9, and the height is not more than 6m.
The combined base 9 is of a cuboid steel structure and is formed by encircling steel plates with the thickness not smaller than 12mm, stiffening ribs are arranged inside the combined base 9, the combined base 9 is fixed with the top layer structure plate 71 through a first embedded part 81 and is fixed with an upper return beam 72 of the top layer structure plate 71 through a second embedded part 82, the depth of the first embedded part 81 embedded into the top layer structure plate 71 is not smaller than 100mm, the depth of the second embedded part 82 embedded into the upper return beam 72 is not smaller than 300mm, a sealing plate is arranged at the bottom of the supporting upright 1 and is a Q34B rectangular steel plate with the thickness of 16mm, the sealing plate is detachably fixed with the combined base 9 through bolts, the bolts used are M22 high-strength bolts, and connecting lug plates are respectively arranged on the outer side walls of the two side flange plates at the top of the supporting upright 1.
The first diagonal brace 2 is H-shaped steel, in this embodiment, an included angle between the H-shaped steel with HW200 x 8 x 12 and the top layer structural plate 71 is 30-60 °, two ends are respectively welded with connecting end plates, the connecting end plate at the top is detachably connected with the connecting ear plate at the top of the supporting upright 1 through bolts, the connecting end plate at the bottom is detachably connected with the third embedded part 83 through bolts, the third embedded part 83 is positioned on the structural beam 73 of the top layer structural plate 71, and the depth of the embedded structural beam 73 is not less than 300mm; the vertical face formed by encircling the first diagonal brace 2, the supporting vertical rod and the top layer structural plate 71 is positioned in the same plane with the overlength steel beam, and is used for stably supporting the upright column 1 and transmitting tensile force.
After the short steel beam section 61 is lifted by tower crane equipment, one end of the short steel beam section is fixedly connected with the upper return beam 72 through foundation bolts 84, and the upper surface of the other end of the short steel beam section is provided with a connecting lug plate which is respectively connected with the temporary pull-fixing assembly and the diagonal bracing pull-fixing rod 4.
The temporary pulling and fixing assembly comprises a chain block 51 and a steel wire rope 52, one end of the chain block 51 is detachably connected with a connecting lug plate at the top of the supporting upright 1, and the other end of the chain block is detachably connected with the connecting lug plate on the upper surface of the short steel beam section 61 through the steel wire rope 52 and is used for temporary fixing during positioning adjustment of the short steel beam section 61.
The diagonal bracing pull fixing rod 4 is H-shaped steel, the H-shaped steel with HW200 being 8 being 12 is used in the embodiment, the H-shaped steel is located below the temporary pull fixing assembly, is arranged in parallel with the temporary pull fixing assembly, forms an included angle with the short steel beam section 61 of 30-60 degrees, connecting end plates are respectively welded at two ends, the connecting end plates at the top are detachably connected with the supporting upright post 1 through bolts, the connecting end plates at the bottom are detachably connected with the connecting lug plates on the upper surface of the short steel beam section 61 through bolts, and the H-shaped steel is used for replacing tower crane equipment to fix the short steel beam section 61 in the high air so as to liberate one tower crane equipment, and the required number of the tower crane in the installation process is reduced.
The second diagonal brace 3 is H-shaped steel, and is used for laterally fixing the supporting upright 1, so that the auxiliary fixing devices of adjacent overlength steel beams are connected into a whole, the bearing capacity of the auxiliary fixing devices is improved, in the embodiment, the H-shaped steel with HW200 x 8 x 12 is used, the two ends of the H-shaped steel are respectively welded with connecting end plates, the connecting end plates at the top of the H-shaped steel are detachably connected with the connecting lug plates arranged at the top of the supporting upright 1 through bolts, the connecting end plates at the bottom of the H-shaped steel are detachably connected with the embedded parts in the top structural plate 71 through bolts, and the vertical face formed by encircling the second diagonal brace 3, the supporting upright and the top structural plate 71 is mutually perpendicular to the vertical face formed by encircling the first diagonal brace 2, the supporting upright and the top structural plate 71; in this embodiment, the connection end plate at the bottom of the second diagonal brace 3 is detachably connected with the first embedded part 81 in the adjacent auxiliary fixing device through bolts.
The hoisting method for installing the steel beam by using the auxiliary fixing device for installing the roof overlong steel beam comprises the following steps:
step one, segmentation of an ultra-long steel beam: carrying out sectional prefabrication on the ultra-long steel beam according to factors such as the weight of the tower crane, the length and the dead weight of the steel beam, the bearing capacity of the auxiliary fixing device, the connection mode of sectional connection nodes of the steel beam and the like;
the method comprises the steps that a generally determined sectional node is arranged at a position of 1/4-1/3 of an ultra-long steel beam, the ultra-long steel beam is divided into two sections, and hoisting and high-altitude butt joint are respectively carried out;
step two, setting an embedded part: determining the setting positions of all embedded parts according to construction design requirements, and installing a first embedded part 81, a second embedded part 82 and a third embedded part 83 when the foundation structure is constructed in civil engineering, accurately measuring the axis position, elevation and plane position, and re-measuring the embedded parts again by using a total station after concrete pouring is completed so as to ensure that the embedded parts have no deviation, and if the deviation is timely adjusted;
step three, installing an auxiliary fixing device: welding and fixing the combined base 9 with the first embedded part 81 and the second embedded part 82, connecting and fixing the support upright 1 with the combined base 9 by adopting an M22 high-strength bolt, then installing the first inclined stay bar 2 and the second inclined stay bar 3, and arranging a temporary pull-fixing assembly on the support upright 1;
step four, hoisting and adjusting the short steel beam section 61: lifting the short steel beam section 61 by using tower crane equipment, fixing one end of the short steel beam section 61 on the upper return beam 72 through anchor bolts 84, connecting the other end of the short steel beam section 61 with a temporary pulling and fixing assembly, and adjusting the levelness of the short steel beam section 61 through a chain block 51;
step five, temporarily fixing the short steel beam section 61: after the short steel beam section 61 reaches a preset position, a diagonal bracing and fixing rod 4 is arranged, the short steel beam section 61 is fixed with an auxiliary fixing device, a temporary fixing device is removed, and tower crane equipment is removed;
step six, hoisting the long steel beam section 62: as shown in fig. 3, the long steel beam section 62 is lifted to a construction position by using tower crane equipment, aligned with the short steel beam section 61 after the position is adjusted, and high-altitude in-situ welding is performed, so that the installation of the ultra-long steel beam is completed, and the auxiliary fixing device is removed after the welding is cooled to room temperature, so that the auxiliary fixing device can be recycled.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.

Claims (8)

1. A auxiliary fixing device for installation of roof overlength girder steel, its characterized in that: the temporary pulling and fixing device is detachably arranged on a top layer structural plate (71) and used for temporarily fixing a lifted short steel beam section (61), and comprises a supporting upright post (1), a first diagonal bracing rod (2), a temporary pulling and fixing component and a diagonal bracing and fixing rod (4); one end of the short steel beam section (61) is fixedly connected with the upper return beam (72) through an anchor bolt (84), and the upper surface of the other end is respectively connected with the temporary pulling and fixing assembly and the diagonal bracing pulling and fixing rod (4);
the supporting upright posts (1) are attached to the inner side walls of the roof return beams (72), and the bottoms of the supporting upright posts are fixed with the top layer structural plates (71) through the combined base (9); the combined base (9) is of a cuboid steel structure, is fixed with the top layer structural plate (71) through a first embedded part (81), and is fixed with an upper return beam (72) of the top layer structural plate (71) through a second embedded part (82);
the top end of the first diagonal brace (2) is detachably connected with the top of the supporting upright post (1), the bottom end of the first diagonal brace is detachably connected with a third embedded part (83), the third embedded part (83) is positioned on a structural beam (73) of the top layer structural plate (71), and a vertical face formed by encircling the first diagonal brace (2), the supporting upright post and the top layer structural plate (71) and the overlength steel beam are positioned in the same plane;
the temporary pulling and fixing assembly comprises a chain block (51) and a steel wire rope (52), one end of the chain block (51) is detachably connected with the top of the supporting upright post (1), and the other end of the chain block is detachably connected with the upper surface of the short steel beam section (61) through the steel wire rope (52);
the diagonal bracing pull fixing rod (4) is positioned below the temporary pull fixing assembly, is arranged in parallel with the temporary pull fixing assembly, is detachably connected with the support upright post (1) at the top end, and is detachably connected with the upper surface of the short steel beam section (61) at the bottom end;
the vertical face that forms is enclosed with support pole setting and top layer structure board (71) to second diagonal brace (3), and the vertical face mutually perpendicular that forms is enclosed with first diagonal brace (2), support pole setting and top layer structure board (71) to second diagonal brace (3) top and support pole (1) top detachable connection, bottom and top layer structure board (71) detachable connection.
2. The auxiliary fixture for roof super-long steel girder installation of claim 1, wherein: the ultra-long steel beam further comprises a long steel beam section (62), and the length ratio of the short steel beam section (61) to the long steel beam section (62) is 1:3-4.
3. The auxiliary fixture for roof super-long steel girder installation of claim 1, wherein: the depth of the first embedded part (81) embedded into the top layer structure plate (71) is not smaller than 100mm, and the depth of the second embedded part (82) embedded into the upper return beam (72) is not smaller than 300mm.
4. The auxiliary fixture for roof super-long steel girder installation of claim 1, wherein: the first inclined stay bar (2) is H-shaped steel, and an included angle between the first inclined stay bar and the top layer structural plate (71) is 30-60 degrees.
5. The auxiliary fixture for roof super-long steel girder installation of claim 1, wherein: the inclined bracing pull fixing rod (4) is H-shaped steel, and an included angle between the inclined bracing pull fixing rod and the short steel beam section (61) is 30-60 degrees.
6. The auxiliary fixture for roof super-long steel girder installation of claim 1, wherein: the supporting upright post (1) is H-shaped steel, and the height is not more than 6m.
7. The auxiliary fixture for roof super-long steel girder installation of claim 1, wherein: the bottom of the supporting upright post (1) is provided with an end sealing plate which is detachably fixed with the combined base (9) through bolts, and the bolts are M22 high-strength bolts.
8. A method of hoisting a steel beam using the auxiliary fixture for roof super long steel beam installation of any one of claims 1 to 7, characterized by: the method comprises the following steps:
step one, segmentation of an ultra-long steel beam: carrying out sectional prefabrication on the ultra-long steel beam according to the weight of the tower crane, the length and the dead weight of the steel beam, the bearing capacity of the auxiliary fixing device and the connection mode factors of sectional connection nodes of the steel beam;
step two, setting an embedded part: according to the construction design requirement, determining the setting position of each embedded part, installing the embedded parts during the civil construction of the foundation structure, and carrying out retesting and adjustment;
step three, installing an auxiliary fixing device: a combined base (9) is arranged, the supporting upright post (1) is connected and fixed with the combined base (9), then a first diagonal brace (2) is arranged, and a temporary pulling and fixing assembly is arranged on the supporting upright post (1);
step four, hoisting and adjusting the short steel beam section (61): lifting the short steel beam section (61) by using tower crane equipment, fixing one end of the short steel beam section (61) on an upper return beam (72), connecting the other end of the short steel beam section with a temporary pulling and fixing assembly, and adjusting the levelness of the short steel beam section (61) through a chain block (51);
step five, temporarily fixing a short steel beam section (61): after the short steel beam section (61) reaches a preset position, a diagonal bracing and fixing rod (4) is arranged, the short steel beam section (61) is fixed with an auxiliary fixing device, a temporary fixing device is removed, and tower crane equipment is removed;
step six, hoisting the long steel beam section (62): and lifting the long steel beam section (62) to a construction position by using tower crane equipment, aligning with the short steel beam section (61) after adjusting the position, performing high-altitude in-situ welding, completing the installation of the ultra-long steel beam, and removing the auxiliary fixing device after cooling.
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CN115370017A (en) * 2022-06-23 2022-11-22 北京城建集团有限责任公司 Method for mounting large-span steel beam on high-altitude daylighting roof by cantilever beam method

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