CN111851962B - Synchronous lifting method for large-area ultrathin grid suspended ceiling - Google Patents
Synchronous lifting method for large-area ultrathin grid suspended ceiling Download PDFInfo
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- CN111851962B CN111851962B CN202010768250.5A CN202010768250A CN111851962B CN 111851962 B CN111851962 B CN 111851962B CN 202010768250 A CN202010768250 A CN 202010768250A CN 111851962 B CN111851962 B CN 111851962B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/18—Implements for finishing work on buildings for setting wall or ceiling slabs or plates
- E04F21/1805—Ceiling panel lifting devices
Abstract
The invention discloses a method for synchronously lifting a large-area ultra-thin grid suspended ceiling, which relates to the field of construction and comprises the following steps: completing the assembly of the suspended ceiling ground according to the requirement; manufacturing a steel structure bracket matched with the suspended ceiling, and placing the suspended ceiling above the steel structure bracket; mounting an electric hoist on a main steel beam for mounting the suspended ceiling, and hanging the electric hoist with the steel structure bracket; starting the electric hoist to integrally lift the suspended ceiling; completing the suspended ceiling and hanging; and removing the steel structure bracket. The invention can accelerate the construction speed, improve the construction efficiency and reduce the lease cost and the labor input of the frame body material.
Description
Technical Field
The invention relates to the technical field of construction, in particular to a synchronous lifting method for a large-area ultrathin grid suspended ceiling.
Background
With the prosperous development of the building market, a large number of public buildings with large-space atrium form are emerging continuously, and the roof of the building is often designed as a steel structure roof truss and a glass daylighting roof. For pursuing building zhongting shadow effect, can generally design the aluminum alloy grid furred ceiling of different modelling in steel construction roof truss below, this type of furred ceiling has: the mounting height is generally higher, the molding is unique, assemble characteristics such as the degree of difficulty is big, according to construction experience in the past, need set up adjustable shelf (under the lower condition of floor height) or full hall handling frame (under the higher condition of floor height) in the furred ceiling below during the furred ceiling installation, then lay auxiliary platform, the workman installs furred ceiling aluminum grid on the platform.
Wherein, to the higher heterotypic furred ceiling of floor height, furred ceiling design complicacy, plane area are great, often can produce that the period of construction is long, the efficiency of construction is low, with high costs scheduling problem through set up full hall handling frame below it.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a large-area ultra-thin type grid suspended ceiling synchronous lifting method aiming at the defects of the prior art, which can accelerate the construction speed, improve the construction efficiency and reduce the frame body material lease cost and labor input.
The technical scheme is as follows: the invention relates to a method for synchronously lifting a large-area ultra-thin grid suspended ceiling, which comprises the following steps:
completing the assembly of the suspended ceiling ground according to the requirement;
manufacturing a steel structure bracket matched with the suspended ceiling, and placing the suspended ceiling above the steel structure bracket;
mounting an electric hoist on a main steel beam for mounting the suspended ceiling, and hanging the electric hoist with the steel structure bracket;
starting the electric hoist to integrally lift the suspended ceiling;
completing the suspended ceiling and hanging;
and removing the steel structure bracket.
Further, accomplish furred ceiling ground and assemble according to the demand, include:
vertical aluminium side pipe location is put and is connect long, and cutting and assembling are managed in the cutting of horizontal aluminium side, and the processing of border banding aluminium side pipe and assembling, cutting and installation are managed in the oblique limit aluminium side of triangle in the well word check, cutting and installation are managed in the grid aluminium side in the triangle area in the well word check.
Further, vertical aluminium side pipe location is put and is lengthened and includes:
the longitudinal aluminum square tubes are formed by butting and connecting 30X 50X 2X 6000mm aluminum square tubes, stainless steel square tubes with the thickness of 200X 49.5X 29.5X 2mm are inserted into the butting positions to serve as core tubes, the core tubes penetrate into the two aluminum square tubes by 100mm, the core tubes are fixed with the aluminum square tubes on the vertical surfaces of two sides by blind rivets, and a plurality of rivets are fixed on each side.
Further, after accomplishing furred ceiling ground according to the demand and assembling, still include:
welding a square steel pipe reinforcing layer above the suspended ceiling, wherein the square steel pipe reinforcing layer comprises a middle reinforcing layer and an edge sealing reinforcing layer;
the middle reinforcing layer and the edge sealing reinforcing layer both comprise a plurality of dip galvanized steel pipes, the dip galvanized steel pipes of the middle reinforcing layer are welded in a criss-cross mode to form a grid, and the dip galvanized steel pipes of the edge sealing reinforcing layer are welded with the edge sealing pipe of the suspended ceiling.
Further, the preparation with the steel structural bracket that the furred ceiling matches, and will the furred ceiling is placed steel structural bracket top includes:
the steel structure brackets are upper and lower double rows of brackets, and the upper and lower rows of brackets are fixedly connected through inclined struts;
and releasing a transverse and vertical control line of the bracket on the ground, releasing the position of each lifting point from the control point to confirm the position of the lifting point of the bracket, and installing six lifting points on the bracket according to the position of the lifting point of the bracket, wherein each lifting point comprises a lifting ring.
Further, be used for the installation install electric block on the main girder steel of furred ceiling to with electric block with steel structural bracket articulates, includes:
installing a support on a main steel beam for installing a suspended ceiling, and installing the electric hoist on the support to ensure that the position of the electric hoist is vertically aligned with the position of a lifting point on a steel structure bracket;
a fixed square pipe used for limiting the bracket is welded on the main steel beam;
and hanging the electric hoist with the hoisting point of the steel structure bracket.
Further, start electric block, carry out furred ceiling integral lifting, include:
lifting uniformly by a main switch, lifting for 2m, suspending to take up the auxiliary rope, observing whether the whole bracket is inclined or not, and independently lifting the inclined part if the inclination phenomenon is found, so as to ensure that the steel bracket and the suspended ceiling are in a horizontal state before lifting each time;
lifting is carried out once according to the height direction of 2m in the steps, whether the inclination exists is observed once when the lifting is carried out, the lifting is carried out next time when the inclination exists, and when the lifting is carried out to the designed elevation, the chain block is used for carrying out later-stage adjustment and installation.
Further, the completion furred ceiling with hang the dress and include:
after the suspended ceiling is lifted in place, the steel wire lifting ropes of the electric hoist are kept fixed, the cable wind ropes are tensioned, the suspended ceiling position is rechecked by using a theodolite, the suspended ceiling is finely adjusted by using a manual hoist, grid lines of the suspended ceiling and the axis of an upper steel beam are aligned, and then the cable wind ropes are fixed on peripheral concrete structural columns, so that the suspended ceiling and the steel bracket are guaranteed to be stable and free of shaking and displacement;
and (3) hanging the suspended ceiling hanging pieces one by one from the central position of the suspended ceiling, fixing the east-west hanging point, fixing the north-south reinforcing layer hanging point, fixing the arc hanging point, and finally hanging the steel wire rope hanging point at the central position of the triangular bevel edge of the unit grid.
Further, a pendant of the suspended ceiling, which is positioned at the lower part of the main steel beam, is connected with the main steel beam in a welding mode;
connecting a pendant of the suspended ceiling on the lower part of the secondary steel beam with the secondary steel beam by adopting a screw and a hoop;
and (3) anchoring the central point of the triangular bevel edge of each unit grid of the suspended ceiling at the framework of the lighting skylight above by adopting a double-strand steel wire rope and a U-shaped flat iron.
Further, demolish steel structural bracket, include:
after the ceiling is checked and accepted, the ceiling, the steel structure bracket and the electric hoist are uniformly checked, after the safety is confirmed, the steel wire rope is slowly released downwards, the steel structure bracket and the ceiling are separated by 0.1-0.2 m, and the ceiling is checked to be deformed;
if the furred ceiling firm in connection does not take place too big change, slowly transfer the steel structure bracket according to vertical every 2m height gradation, whether there is the abnormal conditions in furred ceiling, steel structure bracket, electric block is observed at any time to steel structure bracket decline process, if do not have unusually, slowly transfer the steel structure bracket to ground, transport from the operation district after demolising.
Has the beneficial effects that:
the construction period benefit is as follows: through the implementation of this scheme, need not set up full hall operation frame, ground is assembled easy operation, fast, the construction degree of difficulty greatly reduces, construction quality once becomes excellent, avoids doing over and over again, has shortened unnecessary time limit loss greatly, in military and exhibition building reinforcement and transformation engineering and huadu center project work progress, the time limit has shortened 15 days and 12 days respectively.
Environmental protection benefits: the materials used for ceiling construction are all recyclable materials, the rework rate is low during ground assembly, and the loss of manpower and materials is reduced.
Quality benefit: the construction method is adopted for construction, and has the advantages of convenient operation, good assembly quality and one-time excellent quality.
Economic benefits are as follows: by implementing the method, the material and machine use cost is reduced, the construction speed is high, the labor is saved, and good economic benefits are obtained. Compared with the traditional construction process for erecting a full-space overhead installation suspended ceiling, the direct economic benefits in the army exhibition building reinforcement and reconstruction project and the Huadu center project are respectively 13.71 ten thousand yuan and 15.13 ten thousand yuan.
Drawings
FIG. 1 is a schematic view of a longitudinal aluminum square tube according to the present invention;
FIG. 2 is a schematic view of a transverse aluminum square tube according to the present invention;
FIG. 3 is a schematic structural view of a longitudinal aluminum square tube and a transverse aluminum square tube according to the present invention;
FIG. 4 is a schematic view of the present invention for embodying the structure of a longitudinal aluminum square tube and a transverse aluminum square tube;
FIG. 5 is a schematic view of a triangular bevel edge aluminum square tube according to the present invention;
FIG. 6 is a schematic view of a triangular bevel edge square aluminum tube according to the present invention;
FIG. 7 is a schematic structural view of a longitudinal aluminum square tube and a transverse aluminum square tube according to the present invention;
FIG. 8 is a schematic view of a core tube embodying the present invention;
FIG. 9 is a schematic structural view of an aluminum square tube with triangular bevel edges according to the present invention;
FIG. 10 is a schematic view of the present invention for embodying a steel structural bracket;
FIG. 11 is a schematic view of a construction embodying the present invention;
fig. 12 is a schematic structural diagram of an electric hoist embodying the present invention;
FIG. 13 is a schematic structural diagram of a screw and a band of the present invention.
In the figure, 11, longitudinal aluminum square tubes; 12. a transverse aluminum square tube; 13. triangular bevel edge aluminum square pipe; 2. a core tube; 21. riveting; 3. a steel structural bracket; 31. hoisting points; 4. an electric hoist; 51. a main steel beam; 52. a secondary steel beam; 53. a support; 54. fixing the square tube; 61. a screw; 62. a hoop ring.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.
Example 1: a method for synchronously lifting a large-area ultra-thin grille ceiling, as shown in fig. 1 to 13, includes steps S101 to S106, which are as follows:
s101, finishing the assembly of the suspended ceiling ground according to requirements.
Specifically, can be earlier with 11 location of vertical aluminium square pipe put and meet the length, horizontal aluminium square pipe 12 cutting and assemble, the processing of border banding aluminium square pipe and assemble, the cutting of triangle hypotenuse aluminium square pipe 13 and installation in the well style check, the cutting of grid aluminium square pipe and installation in the triangle area in the well style check.
Wherein, the process of accomplishing the assembly of furred ceiling groined type net (connecting horizontal aluminium square pipe 12 and vertical aluminium square pipe 11) is as follows:
after the horizontal aluminium square pipe 12 is cut, from the middle one vertical aluminium square pipe 11, two directions north and south are spliced with vertical aluminium square pipe 11 in proper order. Fix L type angle sign indicating number to 11 two sides of vertical aluminium square pipe with rivet 21 in the two department of meeting, then insert horizontal aluminium square pipe 12 in the angle sign indicating number outside, fix with self-plugging rivet 21, every side is fixed 3 to analogize, accomplish assembling of furred ceiling groined type net.
Wherein, to 11 location of vertical aluminium side's pipe put and lengthen and include:
the longitudinal aluminum square pipe 11 is formed by butt-jointing 30 × 50 × 2 × 6000mm aluminum square pipes, a stainless steel square pipe 200 × 49.5 × 29.5 × 2mm thick is inserted into the butt-jointed position as the core pipe 2, the core pipe 2 extends into two aluminum square pipes by 100mm, the core pipe 2 is fixed to the aluminum square pipes on the two vertical surfaces of the two sides by blind rivets 21, a plurality of rivets 21 are fixed to each side, and for example, 8 rivets 21 can be fixed to each side.
When the edge sealing aluminum square pipe is processed and assembled on the periphery, the method mainly comprises four parts, namely processing edge sealing circular arc section aluminum square pipes, cutting edge sealing straight line section aluminum square pipes, assembling and lengthening edge sealing circular arc section or straight section aluminum square pipes, and connecting the edge sealing circular arc section aluminum square pipes or straight section aluminum square pipes with the longitudinal and transverse aluminum square pipes 12.
The cutting of the edge sealing straight-line-section aluminum square pipe is mainly based on deepening drawings and the condition that the suspended ceiling is assembled, the length and the end cutting angle of the edge sealing straight-section aluminum square pipe at each part are actually measured in an actual measurement mode on site, and therefore the edge sealing straight-line-section aluminum square pipe is beneficial to being lengthened with adjacent rod pieces.
The method for splicing and lengthening the edge sealing circular arc section or straight section aluminum square pipe and the method for connecting the edge sealing circular arc section aluminum square pipe or straight section aluminum square pipe with the longitudinal and transverse aluminum square pipes 12 are the same as the method for splicing the aluminum square pipes.
The square aluminum pipe 13 with triangular bevel edge in the well-shaped grid is cut and installed, the required size is good, the bevel edge with 45 degrees at two ends is cut, the square aluminum pipe is placed in the corresponding position in the vertical and horizontal well-shaped grid according to the design of the drawing, and the aluminum alloy sheet with 200 multiplied by 20 multiplied by 4mm is fixed on the square aluminum pipe by the rivet 21.
The steps are all completed on the first floor of the ground below the suspended ceiling, and the problems of high difficulty, multiple potential safety hazards and the like of suspended ceiling high-altitude assembly operation are solved.
S102, manufacturing a steel structure bracket 3 matched with the suspended ceiling, and placing the suspended ceiling above the steel structure bracket 3.
Specifically, the steel structure bracket 3 is a double-row bracket, the upper row bracket and the lower row bracket are fixedly connected through inclined struts, a transverse and vertical control line of the bracket is released on the ground, the positions of all lifting points 31 are lofted from a control point to confirm the positions of the lifting points 31 of the bracket, six lifting points 31 are installed on the bracket according to the positions of the lifting points 31 of the bracket, and the lifting points 31 comprise lifting rings.
In practical application, the steel structure bracket 3 is welded according to a design calculation book, the steel structure bracket 3 is a double-row bracket with an upper row and a lower row, the specifications of the horizontal square steel pipes of the upper bracket and the lower bracket are 60 multiplied by 40 multiplied by 2mm, the specifications of the upright posts are 60 multiplied by 40 multiplied by 2mm, and the specifications of the inclined struts of the upright posts are 30 multiplied by 2mm for connection. 8 through long steel keels are discharged from the main frame from the west to the east, the distance is 4m, the maximum length is about 24m, the length specification of a single steel keel is 6m, the steel keels are divided into grids from the west to the east in a 3m direction, and a four-side girth welding construction process is adopted. And an inclined strut is welded between the double-row frames for fixing, and the height of the bracket is 600mm.
In order to realize subsequent hoisting work, hoisting points 31 are arranged on the steel structure bracket 3, the total number of the hoisting points of the bracket is six, the hoisting points 31 adopt welding additional hoisting rings, and phi 14 steel bars can be adopted to reinforce and weld the hoisting points 31.
Wherein, confirming the position of the hanging point 31 of the steel structure bracket 3: and (3) releasing the horizontal and vertical control lines of the bracket from the ground, then lofting the positions of the lifting points 31 from the control points, and finally performing reverse recheck.
In practical application, in order to realize hoisting, hoisting hangers are required to be installed on a main steel beam 51 and a secondary steel beam 52 of a ceiling, and according to a hanging method, the ceiling hangers mainly comprise U-shaped flat steel hangers for connecting the main steel beam 52 and the secondary steel beam 52, vertical flat steel hanging rods welded on the lower portions of the U-shaped flat steel hangers, U-shaped flat steel hoops for fixing an aluminum square pipe and a reinforced layer steel square pipe, connecting bolt nuts of the U-shaped flat steel hoops, steel wire ropes for hoisting triangular bevel edge aluminum square pipes, U-shaped flat steel hangers and adjusting pull rods. All the hanging pieces used on the spot are processed in a factory. And (4) coating the U-shaped flat steel hanging piece and the vertical flat steel hanging rod with anticorrosive fireproof paint.
The U-shaped flat steel pendant at the lower part of the main steel beam 51 is fixed in a welding mode, two sides of the U-shaped flat steel pendant are welded with the side surface of the main steel beam 51, and the length of a single-side welding seam is not less than 15cm. 60X 6mm flat steel hanging rods are welded below the U-shaped flat steel hanging pieces in advance, holes are formed in the lower portions of the U-shaped flat steel hanging pieces, and after the suspended ceiling is lifted in place, M8X 65mm stainless steel bolts can be connected with vertical flat steel on the U-shaped flat steel hoop on the suspended ceiling rod piece.
The U-shaped flat steel pendant at the lower part of the secondary steel beam 52 is fixed in a hoop mode, holes are formed in the upper parts of two sides of the U-shaped flat steel pendant, and the U-shaped flat steel pendant and the secondary steel beam 52 are hooped tightly by an M12 through screw 61 and a matched nut. 60X 6mm flat steel hanging rods are welded below the U-shaped flat steel hanging pieces in advance, holes are formed in the lower portions of the U-shaped flat steel hanging pieces, and after the suspended ceiling is lifted in place, M8X 65mm stainless steel bolts can be connected with vertical flat steel on the U-shaped flat steel hoop on the suspended ceiling rod piece.
The square steel pipe bracket 53 with the size of 100 multiplied by 6mm for the daylighting roof is arranged above the triangular bevel edge aluminum square pipe correspondingly. The steel wire rope is hung on an adjusting pull rod on the upper portion of the steel wire rope, the adjusting pull rod is hung on a U-shaped flat steel hanging piece on the upper portion of the steel wire rope, the U-shaped flat steel hanging piece and a 100 x 6mm horizontal steel pipe on the upper portion of the steel wire rope are fixed through M5.5 x 5 self-tapping screws, and 1 screw is fixed on each side of the U-shaped flat steel hanging piece.
And S103, installing the electric hoist 4 on the main steel beam 51 for installing the suspended ceiling, and hanging the electric hoist 4 with the steel structure bracket 3.
Specifically, a bracket 53 is arranged on a main steel beam 51 for installing a suspended ceiling, the electric hoist 4 is arranged on the bracket 53, and the position of the electric hoist 4 is ensured to be vertically aligned with the position of a hoisting point 31 on a steel structure bracket 3; a fixed square pipe 54 for limiting the bracket 53 is welded on the main steel beam 51; and (3) hanging the electric hoist 4 with a hanging point 31 of the steel structure bracket 3.
Wherein, the steel wire rope for hoisting is a phi 8 galvanized steel wire rope without strand breakage or mechanical scars.
And S104, starting the electric hoist 4 to integrally lift the suspended ceiling.
Specifically, the lifting is carried out uniformly by a main switch, the auxiliary ropes are lifted for 2m and are temporarily stopped to be taken in, whether the integral bracket is inclined or not is observed, if the inclination phenomenon is found, the inclined part is independently lifted, and the steel bracket and the suspended ceiling are ensured to be in a horizontal state before lifting each time;
lifting is carried out once according to the height direction of 2m in the steps, whether the inclination exists is observed once when the lifting is carried out, the lifting is carried out next time when the inclination exists, and when the lifting is carried out to the designed elevation, the chain block is used for carrying out later-stage adjustment and installation.
In practical application, a 6-point balance hoisting method can be adopted. Firstly, trial hoisting is carried out, and the hoisting height is 1m. After the field cleaning has finished and the irrelevant personnel of hoist and mount to qualified back is accomplished in each item inspection, carries out the switch 3 times to the electric hoist, ensures that every equipment is in normal condition, and numbers the electric hoist, prevents to promote the in-process slope, can promote alone. Firstly, the integral grating and the bracket are lifted once in a short distance, the stability is confirmed through inspection, then the lifting is stopped after the lifting is lifted to a distance of 1000mm, the steel bracket is kept stable through traction by using an auxiliary rope, and in order to ensure that the lifting process shakes, a cable rope is respectively bound in the steel bracket in the four directions of east, west, south and north. If the steel bracket has excessive deformation, the bracket needs to be placed on the ground, and the support upright rods or the inclined rods are additionally welded at the weak positions, so that the overall rigidity of the steel bracket is improved.
And S105, finishing the suspended ceiling and hanging.
Specifically, after the suspended ceiling is lifted in place, the steel wire lifting ropes of the electric hoist 4 are kept fixed, the cable wind ropes are tensioned, the suspended ceiling position is rechecked by using a theodolite, the suspended ceiling is finely adjusted by using a manual hoist, grid lines of the suspended ceiling and the axis of an upper steel beam are aligned, and then the cable wind ropes are fixed on peripheral concrete structural columns, so that the suspended ceiling and the steel bracket are guaranteed to be stable and do not shake or move;
and hanging the ceiling hanging pieces one by one from the center position of the ceiling, fixing an east-west hanging point 31, fixing a north-south reinforcing layer upper hanging point 31, fixing an arc hanging point 31, and finally hanging a steel wire rope hanging point 31 at the center position of the triangular bevel edge of the unit grid.
A pendant of the suspended ceiling, which is positioned at the lower part of a main steel beam 51, is connected with the main steel beam 51 in a welding mode, a pendant of the suspended ceiling, which is positioned at the lower part of a secondary steel beam 52, is connected with the secondary steel beam 52 by a screw 61 and a hoop 62, and the central point of the bevel edge of each triangular unit grid of the suspended ceiling is anchored at the framework position of a lighting skylight above by a double-strand steel wire rope and a U-shaped flat iron.
And S106, removing the steel structure bracket 3.
Specifically, after the ceiling is checked and accepted, the ceiling, the steel structure bracket 3 and the electric hoist 4 are inspected in a unified way, and after safety is confirmed, the steel wire rope is slowly released downwards, so that the steel structure bracket 3 is separated from the ceiling by 0.1-0.2 m, and the ceiling is inspected to have excessive deformation;
if the furred ceiling firm in connection does not take place too big change, slowly transfer steel structure bracket 3 according to vertical every 2m height gradation, whether there is the abnormal conditions at any time furred ceiling, steel structure bracket 3, electric block 4 is observed to steel structure bracket 3 decline process, if do not have unusually, slowly transfer steel structure bracket 3 to ground, transport after demolising from the operation district.
In some embodiments, considering that the aluminum square tube of the suspended ceiling has a thin tube wall and the aluminum alloy has a low yield strength, after the assembly of the suspended ceiling ground is completed according to the requirement, the method further comprises the following steps:
welding a square steel pipe reinforcing layer above the suspended ceiling, wherein the square steel pipe reinforcing layer comprises a middle reinforcing layer and an edge sealing reinforcing layer; the middle reinforcing layer and the edge sealing reinforcing layer both comprise a plurality of dip galvanized steel pipes, the dip galvanized steel pipes of the middle reinforcing layer are welded into a grid-shaped grid in a criss-cross mode, and the dip galvanized steel pipes of the edge sealing reinforcing layer are welded with the edge sealing pipe of the suspended ceiling.
The rectangular steel pipe reinforcing layer is arranged on the upper portion of the main rod piece of the aluminum alloy grid suspended ceiling, so that the defects that the thin-wall aluminum alloy grid suspended ceiling is too small in overall strength and rigidity and easy to deflect and deform are overcome.
The beneficial effect of this scheme as follows:
the construction period benefit is as follows: through the implementation of this scheme, need not set up full hall operation frame, ground is assembled easy operation, fast, the construction degree of difficulty greatly reduces, construction quality once becomes excellent, avoids doing over and over again, has shortened unnecessary time limit loss greatly, in military and exhibition building reinforcement and transformation engineering and huadu center project work progress, the time limit has shortened 15 days and 12 days respectively.
Environmental protection benefits: the materials used for ceiling construction are all recyclable materials, the rework rate is low during ground assembly, and the loss of manpower and materials is reduced.
Quality benefit: the construction method is adopted for construction, the operation is convenient, the splicing quality is good, and the construction method is excellent in one-step production.
Economic benefits are as follows: through the implementation of the construction method, the material and machine use cost is reduced, the construction speed is high, the labor is saved, and good economic benefits are obtained. Compared with the traditional construction process for erecting a full-space overhead installation suspended ceiling, the direct economic benefits in the army exhibition building reinforcement and reconstruction project and the Huadu center project are respectively 13.71 ten thousand yuan and 15.13 ten thousand yuan.
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A synchronous lifting method for a large-area ultrathin grid suspended ceiling is characterized by comprising the following steps:
completing the assembly of the suspended ceiling ground according to the requirement; the furred ceiling ground is assembled and is accomplished in furred ceiling below first floor ground, the furred ceiling ground is assembled and is included: the vertical aluminum square tubes (11) are positioned, placed and lengthened, the transverse aluminum square tubes (12) are cut and assembled, the aluminum square tubes are sealed at the periphery and processed and assembled, the triangular oblique-edge aluminum square tubes (13) in the lattice are cut and installed, and the grating aluminum square tubes in the triangular area in the lattice are cut and installed;
after accomplish furred ceiling ground according to the demand and assemble, still include: welding a square steel pipe reinforcing layer above the suspended ceiling, wherein the square steel pipe reinforcing layer comprises a middle reinforcing layer and an edge sealing reinforcing layer; the middle reinforcing layer and the edge sealing reinforcing layer both comprise a plurality of dip galvanized steel pipes, the dip galvanized steel pipes of the middle reinforcing layer are welded into a grid in a criss-cross mode, and the dip galvanized steel pipes of the edge sealing reinforcing layer are welded with the edge sealing pipe of the suspended ceiling; the square steel pipe reinforcing layer and the lower aluminum square pipe are fixed together through a U-shaped flat steel hoop, a bolt and a nut;
manufacturing a steel structure bracket (3) matched with the suspended ceiling, and placing the suspended ceiling above the steel structure bracket (3); the steel structure brackets (3) are upper and lower double rows of brackets, and the upper and lower rows of brackets are fixedly connected through inclined struts; paying out a bracket transverse and vertical control line on the ground, lofting the position of each lifting point (31) from a control point to confirm the position of the bracket lifting point (31), and installing the lifting point (31) on the bracket according to the position of the bracket lifting point (31);
an electric hoist (4) is arranged on a main steel beam (51) for installing the suspended ceiling, and the electric hoist (4) is connected with the steel structure bracket (3) in a hanging mode;
starting the electric hoist (4) to integrally lift the suspended ceiling;
connecting a hanging piece of the suspended ceiling positioned at the lower part of the main steel beam (51) with the main steel beam (51) in a welding mode; a hanging piece of the suspended ceiling, which is positioned at the lower part of the secondary steel beam (52), is connected with the secondary steel beam (52) by adopting a screw rod (61) and a hoop (62); anchoring the central point of the triangular bevel edge of each unit grid of the suspended ceiling at the framework position of a lighting skylight above by adopting a double-strand steel wire rope and a U-shaped flat iron; completing the suspended ceiling and hanging;
and (3) dismantling the steel structure bracket.
2. The method according to claim 1, wherein said longitudinal aluminium square tubes (11) are positioned, laid and lengthened by:
the longitudinal aluminum square pipes (11) are formed by butt joint and lengthening of 30 multiplied by 50 multiplied by 2 multiplied by 6000mm aluminum square pipes, 200 multiplied by 49.5 multiplied by 29.5 multiplied by 2mm thick stainless steel square pipes are inserted into butt joint positions to serve as core pipes (2), the core pipes (2) penetrate into the two aluminum square pipes by 100mm, the core pipes (2) are fixed with the aluminum square pipes on vertical surfaces of two sides through blind rivets (21), and a plurality of rivets (21) are fixed on each side.
3. Method according to claim 1, wherein the making of a steel structural bracket (3) matching the ceiling and placing the ceiling above the steel structural bracket (3) comprises:
six hoisting points (31) are installed on the bracket, and each hoisting point (31) comprises a hoisting ring.
4. The method according to claim 1, wherein the mounting of the electric hoist (4) on the main steel beam (51) for mounting the suspended ceiling and the hitching of the electric hoist (4) with the steel structural bracket comprises:
installing a bracket (53) on a main steel beam (51) for installing a suspended ceiling, and installing the electric hoist (4) on the bracket (53) to ensure that the position of the electric hoist (4) is vertically aligned with the position of a lifting point (31) on a steel structure bracket (3);
a fixed square pipe (54) used for limiting the bracket (53) is welded on the main steel beam (51);
and (3) hanging the electric hoist (4) with a hanging point (31) of the steel structure bracket.
5. Method according to claim 1, characterized in that said actuating of the electric block (4) for the integral lifting of the ceiling comprises:
lifting uniformly by a main switch, lifting for 2m, suspending to take up the auxiliary rope, observing whether the whole bracket is inclined or not, and independently lifting the inclined part if the inclination phenomenon is found, so as to ensure that the steel bracket and the suspended ceiling are in a horizontal state before lifting each time;
lifting is carried out once according to the height direction of 2m in the steps, whether the inclination exists is observed once when the lifting is carried out, the lifting is carried out next time when the inclination exists, and when the lifting is carried out to the designed elevation, the chain block is used for carrying out later-stage adjustment and installation.
6. The method of claim 1, wherein completing the ceiling and hanging comprises:
after the suspended ceiling is lifted in place, the steel wire lifting ropes of the electric hoist (4) are kept fixed, the cable wind ropes are tensioned, the suspended ceiling position is rechecked by using a theodolite, the suspended ceiling is finely adjusted by using a manual hoist, grid lines of the suspended ceiling and the axis of an upper steel beam are aligned, and then the cable wind ropes are fixed on peripheral concrete structural columns, so that the suspended ceiling and the steel bracket are ensured to be stable and not to shake and move;
the suspended ceiling hanging pieces are hung outwards from the central position of the suspended ceiling one by one, firstly, the east-west hanging point (31) is fixed, then, the south-north reinforcing layer upper hanging point (31) is fixed, then, the arc hanging point (31) is fixed, and finally, the steel wire rope hanging point (31) at the central position of the triangular bevel edge of the unit grid is hung.
7. Method according to claim 1, characterized in that said dismantling of the steel structural brackets (3) comprises:
after the ceiling is checked and accepted, the ceiling, the steel structure bracket (3) and the electric hoist (4) are inspected in a unified way, after safety is confirmed, the steel wire rope is slowly released downwards, the steel structure bracket (3) is separated from the ceiling by 0.1-0.2 m, and the ceiling is inspected to have excessive deformation;
if the furred ceiling firm in connection does not take place too big change, slowly transfer steel structure bracket (3) according to vertical every 2m highly minute, whether there is the abnormal conditions in furred ceiling, steel structure bracket (3), electric block (4) is observed at any time in steel structure bracket (3) decline process, if do not have unusually, slowly transfer steel structure bracket (3) to ground, transport away from the operation district after demolising.
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| EP1132540A1 (en) * | 2000-03-10 | 2001-09-12 | Rockwool International A/S | A method of installing a set of ceiling panels |
| CN103696494B (en) * | 2013-12-11 | 2016-03-30 | 中冶天工上海十三冶建设有限公司 | The computer of complex space trussed construction controls hydraulic synchronizing lifting construction method |
| CN105839925A (en) * | 2016-05-10 | 2016-08-10 | 广州建筑股份有限公司 | Method and device for mounting multilayer steel structure in integral-elevation and layered-positioning mode |
| CN109368475B (en) * | 2018-09-26 | 2020-03-27 | 上海市建筑装饰工程集团有限公司 | Use method of integrated auxiliary device for transportation and hoisting of oversized special-shaped suspended ceiling unit |
| CN109811951B (en) * | 2019-03-27 | 2024-01-16 | 中建八局装饰工程有限公司 | Modularized braided plate suspended ceiling assembly, suspended ceiling and installation method thereof |
| CN210947379U (en) * | 2019-08-06 | 2020-07-07 | 北京中建华昊建筑工程有限公司 | Suspended ceiling grid mounting structure |
| CN111119493A (en) * | 2019-12-24 | 2020-05-08 | 广东恒辉建设集团股份有限公司 | Construction method for integrally and synchronously lifting light steel keel |
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