CN115263000A - Device for in-situ correction of super-long steel beam after high-position segmented hoisting and construction method - Google Patents
Device for in-situ correction of super-long steel beam after high-position segmented hoisting and construction method Download PDFInfo
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- CN115263000A CN115263000A CN202211036634.3A CN202211036634A CN115263000A CN 115263000 A CN115263000 A CN 115263000A CN 202211036634 A CN202211036634 A CN 202211036634A CN 115263000 A CN115263000 A CN 115263000A
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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
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
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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
- E04G21/16—Tools or apparatus
- E04G21/162—Handles to carry construction blocks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The invention relates to the technical field of building construction, in particular to a device for in-situ correction after high-position segmented hoisting of an overlong steel beam and a construction method.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a device and a construction method for in-situ correction of an ultra-long steel beam after high-position segmented hoisting.
Background
At present, compared with a reinforced concrete structure, a steel structure has the advantages of small section, light dead weight, better toughness and plasticity, uniform material, high structural reliability and good anti-seismic performance. The internal structure is even, and fail safe nature is higher. The method is widely applied to large-span, high-height and heavy-load structures. If be used for large-scale factory building or super high-rise building to have obvious advantage, but only use in building part, the tower crane weighs hardly satisfies, because the general dead weight of steel construction is great, hangs heavily far away, often is a more troublesome problem in actual operation.
Taking a specific construction case as an example: certain museum requires highly to floor height and hall bay size, and the design institute adopts concrete structure in the basement region to hall core region, turns into the steel construction at first floor to six layers, and seven layers begin to be converted into concrete structure by the steel construction, and then increase the regional floor height in hall and post net interval. If a one-time hoisting technology is adopted, the length of the steel beam is 22.7 meters, the weight of the steel beam is about 45 tons, the steel beam is positioned in the middle of a building, the transportation is extremely difficult by adopting an automobile crane, under the influence and the limitation of multiple conditions such as cost and field, sectional hoisting is needed, but the site assembly only needs to be carried out by hoisting by a tower crane for auxiliary positioning, and accurate correction cannot be carried out, so that the forming quality is uncontrollable.
Disclosure of Invention
The invention aims to provide a device for in-situ correction after high-position sectional hoisting of an ultra-long steel beam and a construction method, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a device of normal position correction after high-order segmentation hoist and mount of overlength girder steel, the device of normal position correction includes:
the profile steel support is horizontally arranged and comprises two cross beams and a plurality of connecting beams;
the steel beams are arranged at the upper ends of the connecting beams through sliding assemblies, and each sliding assembly comprises a supporting plate and a plurality of steel balls;
the side supporting assembly is arranged at the upper end of the cross beam and comprises two supporting frames;
the first adjusting assembly is arranged on one side in the connecting beam;
the second adjusting components are arranged on the supporting frame and comprise a plurality of movable seats;
and the third adjusting assembly is arranged on one side in the movable seat.
Preferably, a plurality of even roof beam level is located between two crossbeams, all is equipped with a plurality of angle sign indicating numbers through a plurality of screws between even roof beam and the crossbeam, even roof beam and crossbeam are the frame construction setting, and even roof beam center upper end has seted up the inserting groove, and backup pad lower extreme center is equipped with the grafting piece, and the grafting piece is pegged graft and is arranged in the inserting groove.
Preferably, the vertical symmetry in even roof beam interpolation groove one side is equipped with a plurality of spacing pipes, and the vertical symmetry of grafting piece lower extreme is equipped with four guide bars, and four guide bars are respectively through four guide tube settings of stopper grafting, and four guide bars are arranged in the guide tube one side and all are cup jointed and are equipped with the spring.
Preferably, a plurality of ball grooves are symmetrically formed in the upper end of the supporting plate, a plurality of steel balls are movably inserted into the ball grooves respectively, the diameter of an opening in the upper end of the supporting plate, which penetrates through the ball grooves, is smaller than the diameter of the steel balls, and the lower end of the steel beam is in contact with the steel balls.
Preferably, the first adjusting assembly comprises a first telescopic cylinder, a shaft rod is horizontally arranged on one side in the connecting beam, the shaft rod is movably sleeved on one side of the first telescopic cylinder, a positioning shaft is horizontally arranged on one side right below the insertion groove in the connecting beam, a cam is movably sleeved on the positioning shaft, a poking plate is obliquely arranged on one side, close to the first telescopic cylinder, of the cam, and the poking plate is connected with one side of the first telescopic cylinder through a connecting shaft to be arranged
Preferably, the support frame is through the vertical grafting crossbeam upper end setting of a plurality of bolts, and the equal horizontal symmetry of support frame is equipped with two bracing pieces, and a plurality of sliding seats cup joint bracing piece one side setting through the bearing activity respectively.
Preferably, the movable seat is sleeved on one side of the supporting rod and is provided with a limiting screw rod in a penetrating and inserting mode through threads, the supporting rod is horizontally provided with a limiting groove on one side of the movable seat, and one side of the limiting screw rod is arranged in the limiting groove in a penetrating and inserting mode.
Preferably, the sliding seat is close to girder steel one side and has seted up the adjustment tank, and the spout has all been seted up at both ends about one side in the adjustment tank, and the level is pegged graft and is equipped with the movable block in the adjustment tank, and both ends all have the slide about the movable block, and two slides are pegged graft two spout settings respectively.
Preferably, a second telescopic cylinder is horizontally inserted and connected to one side of the movable block, one side of the second telescopic cylinder is in contact with one side of the steel beam, the third adjusting assembly comprises a third telescopic cylinder, the third telescopic cylinder is horizontally arranged on one side in the adjusting groove, and one side of the third telescopic cylinder is connected with one side of the movable block in an inserted and connected mode.
The construction method for in-situ correction after high-position segmented hoisting of the ultra-long steel beam is applied to the device for in-situ correction after high-position segmented hoisting of the ultra-long steel beam and comprises the following steps:
the method comprises the following steps: calculating the spacing between the support frames and the erection mode according to the load of the steel beam, paying attention to construction according to a construction drawing in the erection process, and well controlling the elevation of a support surface;
step two: after the section steel support is placed in place, hoisting the steel beam in sections, and roughly aligning the joint position of the steel beam and the section steel support in the hoisting process;
step three: after the first section of steel beam is hoisted in place, the second telescopic cylinder clamps and supports two sides of the steel beam through the rotation of the movable seat;
step four: then the left and right positions of the steel beam are adjusted by controlling the plurality of second telescopic cylinders on the two sides, and under the action of the plurality of steel balls, the friction force is small, so that the time and the labor are saved;
step five: then, the cam is pushed to rotate through the first telescopic cylinder, the supporting plate is jacked up, and the height of the upper position and the lower position of the steel beam is adjusted;
step six: after the height and the left and right positions are adjusted, the third telescopic cylinder pushes the second telescopic cylinder to move along with the cross beam in the steel beam welding direction, so that tight butt joint is realized, and welding is convenient;
step seven: and (5) welding according to a normal welding process, after the welding is finished, moving the section steel support, and repeating the steps for correcting and welding the second section of steel beam until the whole steel beam is welded.
Compared with the prior art, the invention has the beneficial effects that:
through addding the shaped steel support, increase security and welding operation space, guarantee girder steel hoist and mount back whole security, and can effectively ensure welding quality, through set up the sliding assembly on the shaped steel support, the frictional force between girder steel and the shaped steel support has been reduced when the girder steel is proofreaied and correct, the steel construction displacement of being convenient for, rectify, can effectively reduce artifically, the equipment input volume, a plurality of adjusting part's mechanical regulation control, and is stable and reliable, reduce artifical quantity, and overall structure can assemble the combination, and is durable, and convenient to use.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a first perspective view of the three-dimensional structure of the present invention;
FIG. 3 is a second perspective view of the three-dimensional structure of the present invention;
FIG. 4 is a schematic view of the coupling beam structure of the present invention;
FIG. 5 is a schematic view of a movable seat of the present invention;
FIG. 6 is a schematic view of a first adjustment assembly of the present invention;
FIG. 7 is a schematic view of the portion A of FIG. 1 according to the present invention.
In the figure: the steel beam type telescopic steel bar support comprises a section steel support 1, a connecting beam 2, a steel beam 3, a support plate 4, steel balls 5, a support frame 6, a movable seat 7, a guide pipe 8, a guide rod 9, a spring 10, a first telescopic cylinder 11, a shaft rod 12, a positioning shaft 13, a cam 14, a toggle plate 15, an angle code 16, a support rod 17, a limit screw 18, an adjusting groove 19, a sliding groove 20, a movable block 21, a sliding seat 22, a second telescopic cylinder 23 and a third telescopic cylinder 24.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, the present application provides the following five preferred embodiments.
Example one
The utility model provides a device that normal position was rectified after high-order segmentation hoist and mount of overlength girder steel, its characterized in that: the in-situ correction device comprises:
the structural steel support comprises a structural steel support 1, wherein the structural steel support 1 is horizontally arranged, and the structural steel support 1 comprises two cross beams and a plurality of connecting beams 2;
the steel beam 3, the steel beam 3 is arranged at the upper ends of the connecting beams 2 through a sliding assembly, the sliding assembly comprises a supporting plate 4 and a plurality of steel balls 5, the connecting beams 2 are horizontally arranged between the two cross beams 3, a plurality of angle codes 16 are arranged between the connecting beams 2 and the cross beams through a plurality of screws, the connecting beams 2 and the cross beams are arranged in a frame structure, the upper end of the center of the connecting beam 2 is provided with an inserting groove, the center of the lower end of the supporting plate 4 is provided with an inserting block, the inserting block is inserted into the inserting groove, the upper end of the supporting plate 4 is symmetrically provided with a plurality of ball grooves, the steel balls 5 are movably inserted into the ball grooves respectively, the opening diameter of the upper end of the supporting plate 4 is smaller than that of the steel balls 5, and the lower end of the steel beam 3 is arranged in contact with the steel balls 5;
the side supporting component is arranged at the upper end of the cross beam and comprises two supporting frames 6;
the first adjusting assembly is arranged on one side in the connecting beam 2 and comprises a first telescopic cylinder 11, a shaft rod 12 is horizontally arranged on one side in the connecting beam 2, the shaft rod 12 is movably sleeved on one side of the first telescopic cylinder 11, a positioning shaft 13 is horizontally arranged on one side right below an inserting groove in the connecting beam 2, a cam 14 is movably sleeved on the positioning shaft 13, a poking plate 15 is obliquely arranged on one side, close to the first telescopic cylinder 11, of the cam 14, and the poking plate 15 is connected with one side of the first telescopic cylinder 11 through a connecting shaft;
the second adjusting components are arranged on the supporting frame 6 and comprise a plurality of movable seats 7, adjusting grooves 19 are formed in one sides, close to the steel beams 3, of the movable seats 7, sliding grooves 20 are formed in the upper ends and the lower ends of one sides in the adjusting grooves 19, movable blocks 21 are horizontally inserted in the adjusting grooves 19, sliding seats 22 are arranged at the upper ends and the lower ends of the movable blocks 21, and the two sliding seats 22 are respectively inserted into the two sliding grooves 20;
and the third adjusting assembly is arranged on one side in the movable seat 7 and comprises a third telescopic cylinder 24, the third telescopic cylinder 24 is horizontally arranged on one side in the adjusting groove 19, and one side of the third telescopic cylinder 24 is connected with one side of the movable block 21 in an inserted manner.
The in-situ correction construction method after the high-position sectional hoisting of the overlong steel beam is applied to the device for the in-situ correction after the high-position sectional hoisting of the overlong steel beam, and comprises the following steps:
the method comprises the following steps: calculating the space between the support frames and the erection mode according to the load of the steel beam 3, paying attention to construction according to a construction drawing in the erection process, and well controlling the elevation of a support surface;
step two: after the section steel support 1 is placed in place, the steel beam 3 begins to be hoisted in sections, and the joint position of the section steel support and the steel beam 3 is approximately aligned in the hoisting process;
step three: after the first section of steel beam 3 is hoisted in place, the second telescopic cylinder 23 clamps and supports two sides of the steel beam 3 through the rotation of the movable seat 7;
step four: then, the left and right positions of the steel beam 3 are adjusted by controlling the plurality of second telescopic cylinders 23 on the two sides, and under the action of the plurality of steel balls, the friction force is small, so that the time and the labor are saved;
step five: then, the cam 14 is pushed to rotate through the first telescopic cylinder 11, the supporting plate 4 is jacked up, and the height of the steel beam 3 at the upper position and the lower position is adjusted;
step six: after the height and the left and right positions are adjusted, the third telescopic cylinder 24 pushes the second telescopic cylinder 23 and the cross beam 3 to move in the welding direction of the steel beam 3, so that tight butt joint is realized, and the welding is convenient;
step seven: and (4) starting welding according to a normal welding process, after the welding is finished, moving the section steel support 1, and repeating the steps on the second section of steel beam 3 for correction and welding until the whole steel beam 3 is welded.
Example two
On the basis of embodiment one, the vertical symmetry in even 2 interpolation of roof beam groove one side is equipped with a plurality of spacing pipes 8, and the vertical symmetry of grafting piece lower extreme is equipped with four guide bars 9, and four guide bars 9 are pegged graft four guide tubes 8 settings through the stopper respectively, and just four guide bars 9 arrange in guide tube 8 one side all cup joint and are equipped with spring 10, carry out activity direction and reset control to backup pad 4.
EXAMPLE III
On the basis of embodiment two, support frame 6 is through the vertical grafting crossbeam upper end setting of a plurality of bolts, and the equal horizontal symmetry of support frame 6 is equipped with two bracing pieces 17, and a plurality of sliding seat 7 cup joint bracing piece 17 one side setting through the bearing activity respectively, and convenient assembly can repeatedly use.
Example four
On the basis of the third embodiment, the movable seat 7 is sleeved with one side of the supporting rod 17 and is provided with the limiting screw 18 in a penetrating and inserting mode through threads, the supporting rod 17 is horizontally provided with a limiting groove on one side of the movable seat 7, and one side of the limiting screw 18 is arranged in the limiting groove in a penetrating and inserting mode to limit the movable seat 7.
EXAMPLE five
On the basis of the fourth embodiment, the movable block 21 is horizontally inserted and connected with the second telescopic cylinder 23, one side of the second telescopic cylinder 23 is in contact with one side of the steel beam 3, and the steel beam 3 is subjected to action position adjustment and positioning.
When the steel beam welding device is used, the spacing between the support frames and the erection mode are calculated according to the load of the steel beams 3, construction according to a construction drawing is noticed in the erection process, the elevation of a support surface is controlled, the steel beams 3 begin to be hoisted in sections after the section steel support 1 is placed in place, the joint position between the steel beams 3 and the first section of the steel beams 3 is approximately adjusted in the hoisting process, the first section of the steel beams 3 is hoisted in place and then rotated through the movable seat 7, the second telescopic cylinders 23 are used for clamping and supporting the two sides of the steel beams 3, then the left and right positions of the steel beams 3 are adjusted by controlling the plurality of second telescopic cylinders 23 on the two sides, the friction force is small and time and labor are saved under the action of the plurality of steel balls, the cam 14 is pushed to rotate through the first telescopic cylinder 11 to jack up the support plate 4, the height of the upper and lower positions of the steel beams 3 is adjusted, after the height and the left and right positions are adjusted, the second telescopic cylinders 24 push the second telescopic cylinders 23 to move along with the cross beams 3 to weld the steel beams 3 in the welding direction, tight butt joint is realized, the steel beams are convenient to weld, the welding starts to weld according to a normal welding process, and the support frame 1 is moved, the steps are repeated until the whole section steel beams 3 are corrected and welded.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a device that normal position was rectified after high-order segmentation hoist and mount of overlength girder steel, its characterized in that: the in-situ correction device comprises:
the steel support comprises a section steel support (1), wherein the section steel support (1) is horizontally arranged, and the section steel support (1) comprises two cross beams and a plurality of connecting beams (2);
the steel beam (3) is arranged at the upper ends of the connecting beams (2) through a sliding assembly, and the sliding assembly comprises a supporting plate (4) and a plurality of steel balls (5);
the side supporting component is arranged at the upper end of the cross beam and comprises two supporting frames (6);
the first adjusting assembly is arranged on one inner side of the connecting beam (2);
the second adjusting components are arranged on the supporting frame (6) and comprise a plurality of movable seats (7);
and the third adjusting component is arranged on one side in the movable seat (7).
2. The device of claim 1 for in-situ correction of an overlong steel beam after high-position segmented hoisting, which is characterized in that: it is a plurality of even roof beam (2) level is located between two crossbeam (3), all is equipped with a plurality of angle sign indicating numbers (16) through a plurality of screws between even roof beam (2) and the crossbeam, even roof beam (2) and crossbeam are the frame construction setting, even roof beam (2) center upper end has seted up the inserting groove, backup pad (4) lower extreme center is equipped with the grafting piece, and the grafting piece is pegged graft and is arranged in the inserting groove.
3. The device of claim 2 for in-situ correction of an ultra-long steel beam after high-position segmented hoisting, which is characterized in that: even the vertical symmetry in grafting groove one side in roof beam (2) is equipped with a plurality of spacing pipes (8), and the vertical symmetry of grafting piece lower extreme is equipped with four guide bars (9), and four guide bars (9) are pegged graft four guide tubes (8) through the stopper respectively and are set up, and just four guide bars (9) are arranged in guide tube (8) one side and all are cup jointed and are equipped with spring (10).
4. The device of claim 3 for in-situ correction after high-position segmented hoisting of the ultra-long steel beam, which is characterized in that: a plurality of ball grooves are symmetrically formed in the upper end of the supporting plate (4), a plurality of steel balls (5) are movably inserted into the ball grooves respectively, the diameter of an opening in the upper end of the supporting plate (4) penetrating through the ball grooves is smaller than that of the steel balls (5), and the lower end of the steel beam (3) is in contact with the steel balls (5).
5. The device of claim 4 for in-situ correction of an ultra-long steel beam after high-position segmented hoisting, which is characterized in that: the first adjusting assembly comprises a first telescopic cylinder (11), a shaft rod (12) is horizontally arranged on one side in the connecting beam (2), the shaft rod (12) is movably sleeved on one side of the first telescopic cylinder (11), a positioning shaft (13) is horizontally arranged on one side under an inserting groove in the connecting beam (2), a cam (14) is movably sleeved on the positioning shaft (13), a shifting plate (15) is obliquely arranged on one side, close to the first telescopic cylinder (11), of the cam (14), and the shifting plate (15) is connected with one side of the first telescopic cylinder (11) through a connecting shaft.
6. The device of claim 5 for in-situ correction after high-position segmented hoisting of the ultra-long steel beam, characterized in that: support frame (6) are through the vertical grafting crossbeam upper end setting of a plurality of bolts, and the equal horizontal symmetry of support frame (6) is equipped with two bracing pieces (17), and bracing piece (17) one side setting is cup jointed through the bearing activity respectively in a plurality of sliding seats (7).
7. The device of claim 6 for in-situ correction of an ultra-long steel beam after high-position segmented hoisting, which is characterized in that: the movable seat (7) is sleeved with one side of the supporting rod (17) and is provided with a limiting screw rod (18) in a penetrating and inserting mode through threads, the supporting rod (17) is located on one side of the movable seat (7) and is horizontally provided with a limiting groove, and one side of the limiting screw rod (18) is arranged in the limiting groove in a penetrating and inserting mode.
8. The device of claim 7 for in-situ correction after high-position segmented hoisting of an ultra-long steel beam, characterized in that: adjusting groove (19) have been seted up to movable seat (7) one side near girder steel (3), and spout (20) have all been seted up at both ends about one side in adjusting groove (19), and the level is pegged graft in adjusting groove (19) and is equipped with movable block (21), and both ends all have slide (22) about movable block (21), and two slide (22) are pegged graft respectively and two spout (20) set up.
9. The device of claim 8 for in-situ correction after high-position segmented hoisting of the ultra-long steel beam, characterized in that: the movable block (21) one side level is pegged graft and is equipped with second telescoping cylinder (23), and second telescoping cylinder (23) one side contacts the setting with girder steel (3) one side, and third adjusting part includes third telescoping cylinder (24), and one side in adjusting groove (19) is located to third telescoping cylinder (24) level, and grafting is continuous on third telescoping cylinder (24) one side and movable block (21).
10. An in-situ correction construction method for an ultra-long steel beam after high-position segmented hoisting is characterized by comprising the following steps: the construction method for in-situ correction after high-position sectional hoisting of the ultra-long steel beam is applied to the device for in-situ correction after high-position sectional hoisting of the ultra-long steel beam, which is disclosed by any one of claims 1 to 9, and comprises the following steps:
the method comprises the following steps: calculating the space between the support frames and the erection mode according to the load of the steel beam (3), paying attention to construction according to a construction drawing in the erection process, and well controlling the elevation of a support surface;
step two: after the section steel support (1) is placed in place, hoisting the steel beam (3) in sections, and roughly aligning the joint position of the section steel support and the steel beam (3) in the hoisting process;
step three: after the first section of steel beam (3) is hoisted in place, the second telescopic cylinder (23) clamps and supports two sides of the steel beam (3) through rotation of the movable seat (7);
step four: then the left and right positions of the steel beam (3) are adjusted by controlling a plurality of second telescopic cylinders (23) on two sides, and under the action of a plurality of steel balls, the friction force is small, so that time and labor are saved;
step five: then, the cam (14) is pushed to rotate through the first telescopic cylinder (11), the supporting plate (4) is jacked up, and the height of the steel beam (3) at the upper position and the lower position is adjusted;
step six: after the height and the left and right positions are adjusted, the third telescopic cylinder (24) pushes the second telescopic cylinder (23) and the cross beam (3) to move in the welding direction of the steel beam (3), so that tight butt joint is realized, and welding is convenient;
step seven: and (3) starting to weld according to a normal welding process, after the welding is finished, moving the section steel support (1), and repeating the steps to correct and weld the second section of steel beam (3) until the whole steel beam (3) is welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211036634.3A CN115263000B (en) | 2022-08-29 | 2022-08-29 | Device for in-situ correction after high-level sectional hoisting of ultra-long steel beam and construction method |
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|---|---|---|---|
| CN202211036634.3A CN115263000B (en) | 2022-08-29 | 2022-08-29 | Device for in-situ correction after high-level sectional hoisting of ultra-long steel beam and construction method |
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| CN115263000B (en) | 2023-06-20 |
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