CN112267556B - Large-span steel structure corridor assembling construction process for narrow space - Google Patents

Large-span steel structure corridor assembling construction process for narrow space Download PDF

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Publication number
CN112267556B
CN112267556B CN202011078814.9A CN202011078814A CN112267556B CN 112267556 B CN112267556 B CN 112267556B CN 202011078814 A CN202011078814 A CN 202011078814A CN 112267556 B CN112267556 B CN 112267556B
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steel structure
steel
lifting
structure corridor
corridor
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CN112267556A (en
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黄源军
李永文
韦小松
黄斯导
余丹
徐勋佩
黄登辉
赵康健
张毓浩
卢仕明
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Guangdong Construction Engineering Construction Co ltd
Guangdong Construction Engineering Group Co Ltd
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Guangdong Construction Engineering Construction Co ltd
Guangdong Construction Engineering Group Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/35Extraordinary methods of construction, e.g. lift-slab, jack-block
    • E04B1/3511Lift-slab; characterised by a purely vertical lifting of floors or roofs or parts thereof
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/0046Loggias
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/342Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/35Extraordinary methods of construction, e.g. lift-slab, jack-block
    • E04B2001/3588Extraordinary methods of construction, e.g. lift-slab, jack-block using special lifting or handling devices, e.g. gantries, overhead conveying rails

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

Abstract

The application relates to a construction technology is assembled to large-span steel construction vestibule for narrow space belongs to the field of building vestibule, including following step, step one: mounting assembly jig frames on terrace of the skirt buildings on two sides and a top plate of a middle basement; step two: assembling a steel structure corridor on the assembling jig frame; step three: arranging a lifting support above a preset installation position of the tower, and installing hydraulic lifting equipment connected with the steel structure corridor on the lifting support; step four: mounting a corridor bottom decoration panel at the bottom of the steel structure corridor; step five: trial lifting is carried out on the steel structure corridor; step six: integrally lifting the steel structure corridor, and monitoring the lifting process of the steel structure corridor; step seven: lifting the steel structure corridor to a preset height, and connecting the steel structure corridor between the tower buildings on two sides; step eight: unloading the hydraulic lifting equipment and connecting the steel structure corridor; this application has the effect that reduces the installation degree of difficulty of steel construction vestibule.

Description

Large-span steel structure corridor assembling construction process for narrow space
Technical Field
The application relates to the field of building galleries, in particular to a large-span steel structure gallery assembling construction process for a narrow space.
Background
The corridor is the passageway that links up different buildings, is a commonly used building mode, in recent years, sets up the aerial steel truss corridor of large-span between not few high-rise and the super high-rise office building tower, combines building space and view, has increased beautiful scenery one for the city, and the steel construction corridor is connected two towers, makes things convenient for the personnel in two towers to come and go, strengthens the contact between two towers.
The weight of steel construction vestibule is big, consequently can install steel construction vestibule on ground earlier, then wholly promote the steel construction vestibule to predetermined height, is connected steel construction vestibule and tower again, however to the building that has the skirt building, ground between skirt building and the skirt building forms narrow space, to the structure that the span is big like this of steel construction vestibule, is not suitable for carrying out the installation of steel construction vestibule on narrow space and the promotion work afterwards, has increased the construction degree of difficulty.
Disclosure of Invention
In order to reduce the installation degree of difficulty of steel construction vestibule, this application provides a construction technology is assembled to large-span steel construction vestibule for narrow space.
The application provides a construction process is assembled to large-span steel construction vestibule for narrow space adopts following technical scheme:
a construction process for splicing a corridor of a large-span steel structure used in a narrow space, which comprises the following steps,
the method comprises the following steps: mounting assembly jig frames on terrace of the skirt buildings on two sides and a top plate of a middle basement;
step two: assembling a steel structure corridor on the assembling jig frame, and mounting a lower lifting point on the steel structure corridor;
step three: arranging a lifting support above a preset installation position of the tower corresponding to the steel structure corridor, arranging an upper lifting point on the lifting support, installing hydraulic lifting equipment at the upper lifting point, and connecting the hydraulic lifting equipment with the lower lifting point through a steel strand;
step four: installing a scaffold platform below the steel structure corridor on the top plate of the middle basement, and installing a corridor bottom decoration panel at the bottom of the steel structure corridor through the scaffold platform;
step five: the connection between the steel structure corridor and the assembling jig frame is released, the steel structure corridor is tried to be lifted, and the structural deformation of the steel structure corridor and the working condition of hydraulic lifting equipment are checked;
step six: integrally lifting the steel structure corridor, and monitoring the lifting process of the steel structure corridor;
step seven: lifting the steel structure corridor to a preset installation position, and connecting the steel structure corridor between the tower buildings on two sides;
step eight: uninstallation the hydraulic lifting equipment with the connection of steel construction vestibule is dismantled the hydraulic lifting equipment the scaffold platform with assemble the bed-jig, accomplish the installation of steel construction vestibule.
Through adopting above-mentioned technical scheme, the bed-jig is assembled in installation of both sides skirt building balcony and middle basement roof, make the installation space of steel construction vestibule not only be limited to the narrow space between skirt building and the skirt building, in order to adapt to the building space of height span, the space of make full use of skirt building balcony top, thereby provide sufficient space for the installation of steel construction vestibule, reduce the installation degree of difficulty of steel construction vestibule, and assemble the bed-jig and can support the steel construction vestibule, improve the stability before the steel construction vestibule promotes.
Preferably, assemble the bed-jig including set up in a plurality of first steel lattice column of middle basement roof with set up in a plurality of second steel lattice column of skirt building balcony, the capital of first steel lattice column with the capital height of second steel lattice column is the same and all is equipped with the apron, in step two, will be located the lower chord of steel construction vestibule connect in the apron, then install chord, well chord, primary and secondary girder steel and floor carrier plate on the basis of lower chord, assemble the combination and make up the steel construction vestibule.
Through adopting above-mentioned technical scheme, first steel lattice column and second steel lattice column support fixedly to the lower chord member, provide solid bearing structure for assembling of steel construction vestibule to following chord member improves the efficiency of assembling as the basis of assembling the steel construction vestibule.
Preferably, the bottom of first steel lattice column is equipped with the concrete column mound, middle basement roof corresponds the mounting groove has been seted up to the position of first steel lattice column, the concrete column mound pour in the mounting groove, the bottom of first steel lattice column is equipped with first fixed flange, first fixed flange with the concrete column mound passes through expansion bolts and connects, the bottom of second steel lattice column is equipped with the fixed flange of second, the fixed flange of second with the skirt dew platform passes through expansion bolts and connects, the second steel lattice column is located the beam slab top of skirt dew platform.
By adopting the technical scheme, the load borne by the first steel lattice column is transferred to the concrete column pier, and the arrangement of the concrete column pier and the mounting groove enables the load to be further transferred to the top plate of the basement, so that the stability of the first steel lattice column supported by the top plate of the basement is improved; second steel lattice column is located the beam slab of skirt building balcony to improve the stability that the skirt building supported second steel lattice column, and then improve the stability of assembling bed-jig bearing steel construction vestibule.
Preferably, the end parts of the two ends of the upper chord, the middle chord and the lower chord are respectively provided with a cutting part, the tower on the two sides is respectively provided with a connecting rod piece, a lifting reinforcing rod is connected among the same ends of the upper chord, the middle chord and the lower chord, and the lifting reinforcing rod is positioned between the lower hanging points on the two sides; and step five, separating the upper chord, the middle chord and the lower chord from the first steel lattice column and the second steel lattice column to enable the steel structure corridor to be disconnected from the assembly jig frame, and in step seven, after the steel structure corridor reaches a preset height, connecting the cutting part with the connecting rod piece to enable the steel structure corridor to be connected between the towers at two sides.
By adopting the technical scheme, the lifting reinforcing rods are connected with the upper chord, the middle chord and the lower chord, and can transmit the stress of the upper chord and improve the overall structural stability of the steel structure corridor in the lifting process; the connecting rod piece is predetermine to the tower, plays the effect that the steel construction vestibule of being convenient for is connected with the tower to be convenient for aim at predetermined mounted position with the steel construction vestibule.
Preferably, in the fifth step, the trial lifting process comprises the steps of synchronously loading the upper lifting points by 20%, 40%, 60%, 80% and 100%, hovering and standing for 12 hours in the air after the steel structure corridor leaves the assembly jig frame and rises by 20cm, and checking the structural deformation of the steel structure corridor and the working condition of the hydraulic lifting equipment.
Through adopting above-mentioned technical scheme, try to promote steel construction vestibule, help the installation of check out test set whether target in place, guarantee that the whole promotion of steel construction vestibule can go on smoothly.
Preferably, in the sixth step, when the steel structure corridor is lifted, the horizontal distance between the cutting part of the steel structure corridor and the connecting rod piece is 50mm, before the lifting and in the lifting process, the laser plummet is utilized to emit laser beams to the lifting channel of the steel structure corridor, and the obstacles of the lifting channel are found and removed.
Through adopting above-mentioned technical scheme, keep promoting the straightness that hangs down of passageway, reduce the barrier and block the condition that the steel construction vestibule promoted, make the steel construction vestibule promote smoothly.
Preferably, in the sixth step, one of the lower lifting points is used as a reference point, and the lifting speed of each of the rest lower lifting points is adjusted according to the lifting speed of the reference point; and carrying out elevation measurement on the lower hoisting points by using a level gauge every time the steel structure corridor is lifted by one layer, and measuring the accumulated elevation deviation between the reference point and each of the other lower hoisting points.
By adopting the technical scheme, the lifting synchronism of each lower lifting point is improved, the integral inclination condition of the steel structure corridor is reduced, the elevation accumulated deviation of the reference point and other lower lifting points is measured by the level gauge, and a basis is provided for subsequent elimination of the accumulated deviation.
Preferably, the hydraulic lifting equipment including install in promote the support and with the punching jack that the steel strand wires are connected and with the hydraulic oil pump that the punching jack is connected, the punching jack is equipped with the hydro-cylinder stroke scale, through hydro-cylinder stroke scale and elevation cumulative deviation measure the regulation stroke control value, again according to adjusting the stroke control value the leveling is carried out to the steel construction vestibule, eliminates the every elevation cumulative deviation that promotes the one deck of steel construction vestibule.
Through adopting above-mentioned technical scheme, the center-piercing jack is used for promoting the steel construction vestibule, and the setting up of hydro-cylinder stroke scale is convenient for eliminate truss-lifting's cumulative deviation to the use cost of spirit level and hydro-cylinder stroke scale is low, accords with the economy and is suitable for the principle.
Preferably, each corner of the steel structure corridor is provided with a positioning rope, and in the sixth step, when high wind is met, the lifting is stopped, and the positioning ropes are connected with the tower.
Through adopting above-mentioned technical scheme, during strong wind, the location rope is connected with the tower, restricts the horizontal hunting of steel construction vestibule, protects steel construction vestibule and construction equipment.
Preferably, promote the support including connect in tower and horizontal distribution's a plurality of branch, connect in a plurality of branch is kept away from the tip of tower and confession go up the lifting base station that the hoisting point set up, connect in a plurality of strengthen the piece between the branch, set up in both sides branch just is located both sides the stiffener of the side that branch deviates from mutually and with promote the bracing piece that the base station bottom surface is connected, the stiffener and the bracing piece all with the tower is connected.
Through adopting above-mentioned technical scheme, the setting of reinforcement piece can improve the joint strength between the branch to improve the stability that promotes the base station, and the setting of stiffener and bracing piece improves the joint strength of branch and tower, further improves the stability of hoisting point.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the assembling jig frames are arranged on the podetiums of the skirt buildings at the two sides and the top plate of the middle basement, so that the installation space of the steel structure corridor is not limited to the narrow space between the skirt buildings to adapt to the building space with high and low spans, and the space of the podetiums is fully utilized, so that enough space is provided for the installation of the steel structure corridor, the installation difficulty of the steel structure corridor is reduced, the assembling jig frames can support the steel structure corridor, and the stability of the steel structure corridor before lifting is improved;
2. the elevation accumulation deviation of hoisting point and datum point under the surveyor's level monitoring improves the synchronous rate that each hoisting point promoted, and hydro-cylinder stroke scale can obtain the regulation stroke control value with the surveyor's level cooperation, and the staff carries out the leveling to the steel construction vestibule according to adjusting the stroke control value, ensures that steel construction vestibule safety promotes.
Drawings
Fig. 1 is a schematic plan view of a steel structure corridor installed between towers.
Fig. 2 is a schematic perspective view of a steel structure corridor.
Fig. 3 is a schematic cross-sectional structure diagram of the first embodiment of the present application.
Fig. 4 is a schematic plan view of a first steel lattice column according to a first embodiment of the present application.
Fig. 5 is a schematic plan structure diagram of a steel structure corridor lifting process in the first embodiment of the present application.
Fig. 6 is a schematic perspective view of a lifting bracket according to a first embodiment of the present application.
Fig. 7 is a schematic cross-sectional structure view of a first steel lattice column according to a second embodiment of the present application.
Description of reference numerals: 1. a tower; 11. a podium building; 2. a steel structure corridor; 21. a lower chord; 22. a middle chord; 23. an upper chord; 24. primary and secondary steel beams; 25. a floor deck; 3. assembling a jig frame; 31. a first steel lattice column; 32. a second steel lattice column; 33. a cover plate; 34. mounting grooves; 35. concrete column piers; 36. a first fixed convex plate; 4. a lower hoisting point; 41. a lifting seat; 42. lifting the reinforcing rod; 43. a cutting part; 44. connecting rod pieces; 45. positioning the rope; 5. lifting the support; 51. a strut; 52. lifting the base platform; 53. lifting points; 54. a reinforcing sheet; 55. a reinforcing bar; 56. a support bar; 57. a center-penetrating jack; 58. an oil cylinder stroke scale; 59. steel strand wires; 6. a carrier plate; 61. a countersunk hole; 62. and (5) fixing the bolt.
Detailed Description
The present application is described in further detail below with reference to figures 1-7.
As shown in fig. 1, the position that needs installation steel construction vestibule 2 is between two tower buildings 1, two tower buildings 1's long limit direction mutually perpendicular, and steel construction vestibule 2's both ends are connected respectively in two tower buildings 1 mutually perpendicular and the side that is close to, and the long limit length in both sides of steel construction vestibule 2 differs, and the bottom of tower building 1 is equipped with skirt building 11, and ground between the skirt building 11 is middle basement roof.
As shown in fig. 2, the steel structure corridor 2 includes an upper chord 23, a middle chord 22, a lower chord 21, a primary steel beam 24, a secondary steel beam 24 and a floor support plate 25, the upper chord 23, the middle chord 22 and the lower chord 21 are distributed from top to bottom, the upper chord 23, the middle chord 22 and the lower chord 21 are all provided with two different lengths and are respectively located on two sides of the steel structure corridor 2 along the length direction, and the primary steel beam 24 and the secondary steel beam 25 are all connected and fixed among the upper chord 23, the middle chord 22 and the lower chord 21, so as to form the steel structure corridor 2.
The first embodiment is as follows:
the embodiment of the application discloses a construction technology is assembled to large-span steel construction vestibule for narrow space. As shown in fig. 3, the assembling construction process for the large-span steel structure corridor in the narrow space comprises the following steps:
the method comprises the following steps: the assembled bed-jig 3 is arranged on the terrace of the skirt buildings 11 at the two sides and the top plate of the basement in the middle,
assembling jig 3 includes first jig unit and second jig unit, first jig unit and second jig unit all include a plurality of first steel lattice column 31 and a plurality of second steel lattice column 32, first steel lattice column 31 sets up perpendicularly in middle basement roof, second steel lattice column 32 sets up perpendicularly in the balcony of skirt building 11, in this embodiment, first jig unit includes two first steel lattice column 31 and two second steel lattice column 32 along steel structure vestibule 2's length direction distribution, second jig unit includes three first steel lattice column 31 and two second steel lattice column 32 along steel structure vestibule 2's length direction distribution, the position of first jig unit corresponds the short long limit of steel structure vestibule 2 length, the position of second jig unit corresponds the long limit of steel structure vestibule 2 length.
As shown in fig. 3 and 4, specifically, the first steel lattice column 31 and the second steel lattice column 32 are surrounded by four angle steels, a plurality of oblique lacing bars are fixedly connected between adjacent angle steels, the tops of the first steel lattice column 31 and the second steel lattice column 32 are horizontally fixed with cover plates 33, and the heights of the cover plates 33 of the first steel lattice column 31 and the second steel lattice column 32 are the same.
A mounting groove 34 is formed in the position, corresponding to the first steel lattice column 31, of the bearing surface of the top plate of the middle basement, and a concrete column pier 35 is poured in the mounting groove 34; first steel lattice column 31's bottom is fixed with first fixed flange 36, first fixed flange 36 extends outward along the bottom level of angle steel, expansion bolts is worn to be equipped with by first fixed flange 36, expansion bolts's end is connected fixedly with concrete column mound 35, thereby be connected fixedly with first steel lattice column 31's bottom and concrete column mound 35, the load that makes first steel lattice column 31 receive transmits concrete column mound 35, concrete column mound 35 transmits load to middle basement roof, improve the stability that middle basement roof supported first steel lattice column 31, and then improve first steel lattice column 31's holding power.
The bottom of second steel lattice column 32 is fixed with the fixed flange of second, the fixed flange of second extends outward along the bottom level of angle steel, expansion bolts is worn to be equipped with by the fixed flange of second, expansion bolts's end and 11 stands of skirt building are connected fixedly, thereby be fixed in the balcony of skirt building 11 with second steel lattice column 32 connection, and second steel lattice column 32 connects directly over the beam slab of 11 stands of skirt building, utilize the high characteristics of bearing capacity of the balcony of skirt building 11 in the beam slab position, the stability of second steel lattice column 32 is supported to the balcony that improves skirt building 11, and then improve second steel lattice column 32's supporting capacity.
Step two: as shown in fig. 2 and 3, the steel structure corridor 2 is assembled on the assembling jig frame 3, the lower chord member 21 with short length is welded and fixed with the first steel lattice column 31 of the first jig frame unit and the cover plate 33 of the second steel lattice column 32, the end part of the lower chord member 21 with long length is welded and fixed with the first steel lattice column 31 of the second jig frame unit and the cover plate 33 of the second steel lattice column 32, and the middle chord member 22, the upper chord member 23, the primary and secondary steel beams 24 and the floor bearing plate 25 are installed on the basis of the lower chord member 21, so that the assembling of the steel structure corridor 2 is realized.
The setting up of first steel lattice column 31 and second steel lattice column 32 promotes the height of 11 balcony of skirt building with steel construction vestibule 2's mounted position, has reduced the restriction of the narrow space between 11 and the skirt building to the installation of steel construction vestibule 2, and the building space is striden with the height that middle basement roof formed to the 11 balcony of better adaptation both sides skirt building, provides sufficient space for the installation of steel construction vestibule 2, reduces steel construction vestibule 2's the installation degree of difficulty.
As shown in fig. 5, after the installation on the steel structure corridor 2 is completed, lower hanging points 4 are arranged at two ends of the upper chord 23, and lifting seats 41 for connecting with steel strands 59 are installed on the lower hanging points 4; welded fastening has the promotion anchor strut 42 between the same end of upper chord 23, well chord 22 and lower chord 21, promotes the vertical setting of anchor strut 42, promotes anchor strut 42 with upper chord 23, well chord 22 and lower chord 21 connecting piece together, improves the structural stability at 2 both ends of steel construction vestibule to promote anchor strut 42 and can disperse the atress of upper chord 23, improve the overall stability of steel construction vestibule 2 promotion processes.
According to the distance from the two ends of the upper chord 23, the middle chord 22 and the lower chord 21 to the tower 1, the two ends of the upper chord 23, the middle chord 22 and the lower chord 21 are cut off, the two ends of the upper chord 23, the middle chord 22 and the lower chord 21 form a cutting part 43, the distance between the cutting part 43 and the outer wall scaffold of the tower 1 is 50mm, and a connecting rod piece 44 connected with the cutting part 43 is preset at the preset installation position of the steel structure corridor 2 of the tower 1.
Step three: as shown in fig. 5 and 6, a lifting bracket 5 is arranged above a predetermined installation position of a steel structure corridor 2 on a tower 1, four lifting brackets 5 are arranged corresponding to lower lifting points 4, each lifting bracket 5 comprises a support rod 51, a lifting base platform 52, a reinforcing sheet 54, a reinforcing rod 55 and a support rod 56, the support rods 51 are fixedly connected to the tower 1, two support rods 51 are arranged and are parallel to each other, and the two support rods 51 are distributed along the horizontal direction; promote base station 52 and be fixed in branch 51 and keep away from the tip of tower 1, promote base station 52 and two branch 51 and together connect fixedly, it is provided with hoisting point 53 to promote base station 52, it is located same vertical line with the lower hoisting point 4 that corresponds to go up hoisting point 53, hydraulic lifting equipment is installed to going up hoisting point 53, hydraulic lifting equipment includes punch-through jack 57 and the hydraulic oil pump of being connected with punch-through jack 57, be connected with steel strand wires 59 between punch-through jack 57 and the lifting seat 41, realize the promotion of steel construction vestibule 2 through punch-through jack 57.
A plurality of reinforcing sheets 54 are arranged along the length direction of the struts 51, and two ends of each reinforcing sheet 54 are fixedly connected with the two struts 51 respectively, so that the connection of the two struts 51 is realized, and the stability of the lifting base platform 52 is improved; the reinforcing rods 55 are arranged on two side faces, which are respectively located at the opposite sides of the two support rods 51, one end of each reinforcing rod 55 is fixedly connected with the corresponding support rod 51, the other end of each reinforcing rod 55 is fixedly connected with the tower 1, a preset included angle is formed between each reinforcing rod 55 and each support rod 51, in the embodiment, the included angle is 50 degrees, the reinforcing rods 55 play a role in limiting the deflection of the support rods 51 in the horizontal direction, and the capability of the lifting base platform 52 in resisting the influence of wind force in the high altitude is improved; one end fixed connection of bracing piece 56 in the bottom surface that promotes base station 52, other end fixed connection in tower 1, forms predetermined contained angle between bracing piece 56 and the branch 51, and in this embodiment, the contained angle is 45, and bracing piece 56 plays the effect that improves the ability that promotes base station 52 and bear steel construction vestibule 2.
Step four: installing a scaffold platform on the top plate of the middle basement, wherein the scaffold platform is positioned below the steel structure corridor 2, and installing a corridor bottom decoration panel at the bottom of the steel structure corridor 2 by a worker through the scaffold platform;
step five: as shown in fig. 3 and 5, the connection between the lower chord 21 and the first steel lattice column 31 and the second steel lattice column 32 is released by cutting, then the steel structure corridor 2 is tried to be lifted, the upper lifting points 53 are synchronously loaded step by step according to the proportion of 20%, 40%, 60%, 80% and 100%, the steel structure corridor 2 is separated from the first steel lattice column 31 and the second steel lattice column 32, after the steel structure corridor 2 is lifted for 20cm, the steel structure corridor 2 is hovered and kept still for 12h in the air, and the structural deformation of the steel structure corridor 2 and the working condition of the hydraulic lifting equipment are checked.
Step six: as shown in fig. 5, after checking that each item of trial lifting is normal, preparing to lift the steel structure corridor 2 integrally; before promoting, set up laser plummet at 11 balcony framves in the skirt building, laser plummet is located the tip of steel construction vestibule 2 and the position between the tower 1, and laser plummet uses the promotion passageway at steel construction vestibule 2 both ends as the transmission route, upwards launches the laser beam, keeps promoting the straightness that hangs down of passageway, according to the transmission condition of laser beam, discovers the barrier to in time adjust the position of barrier, guarantee the unblocked of the promotion passageway of steel construction vestibule 2.
Every hoisting point 53 all arranges the staff and monitors and operates, carries out the jar operation that stretches of jack 57 that pierces through simultaneously, drives steel strand wires 59 and upwards promotes, carries out whole promotion to steel construction vestibule 2, and the lifting process keeps cutting off portion 43 and connecting rod piece 44's horizontal distance to be 50mm to after guaranteeing that steel construction vestibule 2 reachs predetermined mounted position, cutting off portion 43 can be smoothly connected with connecting rod piece 44 and fold.
And one of the lower lifting points 4 is taken as a reference point, and the lifting speed of the reference point is taken as the reference in the lifting process, so that the lifting speeds of the other lower lifting points 4 are adjusted in time, and the synchronism of the lower lifting points 4 in the lifting process is ensured.
In addition, every time the steel structure corridor 2 lifts one floor, a level gauge is arranged on the floor, elevation measurement is carried out on each lower lifting point 4, and the accumulated elevation deviation between each other lower lifting point 4 and the reference point is obtained by taking the reference point as the reference.
As shown in fig. 5 and 6, a cylinder stroke scale 58 is arranged at the cylinder extending part of the through jack 57, the length of the cylinder stroke scale 58 is the maximum cylinder extending stroke of the through jack 57, and the cylinder extending stroke of the through jack 57 at each time can be monitored by the cylinder stroke scale 58; when the steel structure corridor 2 lifts one floor, taking the cylinder extending stroke of the center-penetrating jack 57 of the reference point as a standard stroke, taking the accumulated deviation of the elevations of the rest lower hoisting points 4 and the reference point as an adjusting value, and subtracting the adjusting value from the standard stroke to obtain an adjusting stroke control value of the lower hoisting point 4 if the elevation of a certain lower hoisting point 4 is greater than the elevation of the reference point; if the elevation of a certain lower lifting point 4 is smaller than that of the datum point, the standard stroke is added with the adjusting value to obtain an adjusting stroke control value of the lower lifting point 4, and the cylinder extending stroke of the lower lifting point 4 penetrating jack 57 during next lifting is increased or decreased by adjusting the stroke control value, so that the leveling of the steel structure corridor 2 is realized, the accumulated deviation is eliminated, the use cost of the leveling instrument and the oil cylinder stroke scale 58 is low, and the economic and applicable principle is met.
As shown in fig. 5, in addition, four corners of the steel structure corridor 2, which are located on the lower chord 21, are all connected with positioning ropes 45, the positioning ropes 45 are specifically steel wire ropes, and when the steel structure corridor 2 is lifted, one end of each positioning rope 45, which is far away from the steel structure corridor 2, is suspended; when meetting the strong wind, stop the lifting operation immediately, the staff is connected the location rope 45 with the major structure of tower 1 to resist wind-force, restrict the horizontal hunting of steel construction vestibule 2, protect steel construction vestibule 2 and construction equipment.
Step seven: lifting the steel structure corridor 2 to a preset installation position, fixedly connecting the cutting part 43 with the connecting rod piece 44, and additionally installing a reinforcing rod piece between the primary and secondary steel beams 24 and the tower buildings 1 to realize that the steel structure corridor 2 is connected between the tower buildings 1 on two sides.
Step eight: uninstallation hydraulic lifting equipment and steel construction vestibule 2's connection, dismantles and promotes anchor strut 42, hydraulic lifting equipment, scaffold platform and assemble bed-jig 3, accomplishes steel construction vestibule 2's installation.
Example two:
as shown in fig. 7, the difference between the first embodiment and the second embodiment is that the connection manner of the assembling jig frame 3 and the lower chord 21 is different, in the present embodiment, a plurality of bearing plates 6 are detachably mounted on the bearing surface of the cover plate 33, countersunk holes 61 are formed in four corners of the bearing plates 6, fixing bolts 62 in threaded connection with the cover plate 33 penetrate through the countersunk holes 61, the bearing plates 6 are also connected by the fixing bolts 62, the fixing bolts 62 of adjacent bearing plates 6 are mutually staggered and distributed along the height direction, and in the second step, the lower chord 21 is welded and fixed to the bearing plate 6 on the topmost side; and before welded fastening, through the quantity that increases and decreases loading board 6, the capital height of first steel lattice column 31 and second steel lattice column 32 individually can be adjusted according to the whole height of assembling bed-jig 3 for it is whole more level and more smooth to assemble the bed-jig 3, and in step four, when vestibule bottom decoration panel installs corresponding position of assembling bed-jig 3, through dismantling loading board 6, can provide great installation space for installing vestibule bottom decoration panel, improve the installation effectiveness.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. The utility model provides a construction technology is assembled to large-span steel construction vestibule for narrow space which characterized in that: comprises the following steps of (a) carrying out,
the method comprises the following steps: assembling jig frames (3) are arranged on terrace of the skirt buildings (11) at two sides and a top plate of the basement in the middle;
step two: assembling a steel structure corridor (2) on the assembling jig frame (3), and installing a lower lifting point (4) on the steel structure corridor (2);
step three: a lifting support (5) is arranged above a preset installation position of the tower (1) corresponding to the steel structure corridor (2), an upper lifting point (53) is arranged on the lifting support (5), hydraulic lifting equipment is installed at the upper lifting point (53), and the hydraulic lifting equipment is connected with the lower lifting point (4) through a steel strand (59);
step four: installing a scaffold platform below the steel structure corridor (2) on the top plate of the middle basement, and installing a corridor bottom decoration panel at the bottom of the steel structure corridor (2) through the scaffold platform;
step five: the connection between the steel structure corridor (2) and the assembling jig frame (3) is released, the steel structure corridor (2) is tried to be lifted, and the structural deformation of the steel structure corridor (2) and the working condition of hydraulic lifting equipment are checked;
step six: integrally lifting the steel structure corridor (2), and monitoring the lifting process of the steel structure corridor (2);
step seven: lifting the steel structure corridor (2) to a preset height, and connecting the steel structure corridor (2) between the tower buildings (1) on two sides;
step eight: unloading the connection between the hydraulic lifting equipment and the steel structure corridor (2), and disassembling the hydraulic lifting equipment, the scaffold platform and the assembling jig frame (3) to complete the installation of the steel structure corridor (2);
the assembling jig frame (3) comprises a plurality of first steel lattice columns (31) arranged on the top plate of the middle basement and a plurality of second steel lattice columns (32) arranged on the terrace of the skirt building (11), the heights of the tops of the first steel lattice columns (31) and the tops of the second steel lattice columns (32) are the same, cover plates (33) are arranged, in the second step, lower chords (21) located on the steel structure corridor (2) are connected to the cover plates (33), then upper chords (23), middle chords (22), primary and secondary steel beams (24) and floor bearing plates (25) are installed on the basis of the lower chords (21), and the steel structure corridor (2) is assembled and combined;
a plurality of bearing plates (6) are detachably installed on the bearing surface of the cover plate (33), counter bores (61) are formed in four corners of the bearing plates (6), fixing bolts (62) connected with the cover plate (33) in a threaded mode are arranged in the counter bores (61) in a penetrating mode, the bearing plates (6) are connected through the fixing bolts (62) in the same mode, the fixing bolts (62) of the adjacent bearing plates (6) are distributed in a staggered mode along the height direction, and in the second step, the lower chord (21) is fixedly welded to the bearing plate (6) on the top side.
2. The assembly construction process for the large-span steel structure corridor in the narrow space, according to claim 1, is characterized in that: the bottom of first steel lattice column (31) is equipped with concrete column mound (35), middle basement roof corresponds mounting groove (34) have been seted up to the position of first steel lattice column (31), concrete column mound (35) pour in mounting groove (34), the bottom of first steel lattice column (31) is equipped with first fixed flange (36), first fixed flange (36) with concrete column mound (35) are through expansion bolts connection, the bottom of second steel lattice column (32) is equipped with the fixed flange of second, the fixed flange of second with skirt building (11) balcony passes through expansion bolts connection, second steel lattice column (32) are located the beam slab top of skirt building (11) balcony.
3. The assembly construction process for the large-span steel structure corridor in the narrow space, according to claim 1, is characterized in that: the end parts of the two ends of the upper chord (23), the middle chord (22) and the lower chord (21) are respectively provided with a cutting part (43), the tower (1) on two sides is respectively provided with a connecting rod piece (44), lifting reinforcing rods (42) are connected among the same ends of the upper chord (23), the middle chord (22) and the lower chord (21), and the lifting reinforcing rods (42) are positioned among the lower lifting points (4) on two sides; in the fifth step, the upper chord member (23), the middle chord member (22) and the lower chord member (21) are separated from the first steel lattice column (31) and the second steel lattice column (32), so that the steel structure corridor (2) is disconnected from the assembly jig frame (3), and in the seventh step, after the steel structure corridor (2) reaches a preset height, the cutting part (43) and the connecting rod member (44) are connected to two sides of the steel structure corridor (2) between the towers (1).
4. The assembly construction process for the large-span steel structure corridor in the narrow space, according to claim 1, is characterized in that: in the fifth step, the trial lifting process comprises the steps of synchronously loading the upper lifting points (53) by 20%, 40%, 60%, 80% and 100% step by step, hovering and standing for 12 hours in the air after the steel structure corridor (2) leaves the assembling jig frame (3) and rises for 20cm, and checking the structural deformation of the steel structure corridor (2) and the working condition of the hydraulic lifting equipment.
5. The assembling construction process of the large-span steel structure corridor for the narrow space according to the claim 3, which is characterized in that: and sixthly, when the steel structure corridor (2) is lifted, the horizontal distance between the cutting part (43) of the steel structure corridor (2) and the connecting rod piece (44) is 50mm, and before lifting and in the lifting process, a laser plummet is utilized to emit laser beams to the lifting channel of the steel structure corridor (2), so that the obstacles of the lifting channel are found and removed.
6. The assembly construction process for the large-span steel structure corridor in the narrow space, according to claim 1, is characterized in that: taking one of the lower lifting points (4) as a reference point, and adjusting the lifting speed of each of the other lower lifting points (4) according to the lifting speed of the reference point; and (3) carrying out elevation measurement on the lower hoisting points (4) by using a level gauge every time the steel structure corridor (2) is lifted by one layer, and measuring the elevation accumulated deviation between the reference point and each of the other lower hoisting points (4).
7. The assembly construction process for the large-span steel structure corridor in the narrow space according to claim 1, characterized in that: hydraulic lifting equipment including install in promote support (5) and with punching jack (57) that steel strand wires (59) are connected and with the hydraulic oil pump that punching jack (57) are connected, punching jack (57) are equipped with hydro-cylinder stroke scale (58), through hydro-cylinder stroke scale (58) and elevation cumulative deviation measure and adjust stroke control value, according to adjusting stroke control value again steel construction vestibule (2) carry out the leveling, eliminate the every elevation cumulative deviation that promotes the one deck of steel construction vestibule (2).
8. The assembly construction process for the large-span steel structure corridor in the narrow space, according to claim 1, is characterized in that: each corner of steel construction vestibule (2) all is equipped with location rope (45), and in step six, when meetting the strong wind, stop to promote, will location rope (45) with tower (1) is connected.
9. The assembly construction process for the large-span steel structure corridor in the narrow space, according to claim 1, is characterized in that: promote support (5) including connect in tower (1) and horizontal distribution's a plurality of branch (51), connect in a plurality of branch (51) are kept away from the tip of tower (1) and supply go up promotion base station (52), the connection in a plurality of that hoisting point (53) set up strengthen piece (54), set up in both sides between branch (51) and are located both sides stiffener (55) of the side that branch (51) deviate from mutually and with promote bracing piece (56) that base station (52) bottom surface is connected, stiffener (55) and bracing piece (56) all with tower (1) is connected.
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CN113898065A (en) * 2021-10-15 2022-01-07 中建八局第一建设有限公司 High-altitude large-span steel structure corridor and lifting construction method thereof
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