CN111663698A

CN111663698A - Assembled steel structure roof and assembling construction method thereof

Info

Publication number: CN111663698A
Application number: CN202010631570.6A
Authority: CN
Inventors: 胡敬铨; 蒋国平; 倪波涛; 张晓曦
Original assignee: Fujian Yongfu Construction Group Co ltd; Fujian Jiangxia University
Current assignee: Fujian Yongfu Construction Group Co ltd; Fujian Jiangxia University
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2020-09-15

Abstract

The invention discloses an assembled steel structure roof, which comprises a concrete foundation and a steel structure roof body, wherein the concrete foundation is formed by combining a plurality of stand columns and circular ring beams; the steel structure roof body comprises an inner core ring positioned in the middle, a plurality of edge main beams uniformly distributed on the periphery of the inner core ring, a plurality of arc main beams detachably arranged between the two edge main beams, edge secondary beams with two ends detachably connected with the arc main beams and the concrete foundation respectively, and a plurality of arc secondary beams detachably arranged between the edge secondary beams and the edge main beams; a plurality of overhanging beams with the same number as the edge main beams are uniformly and fixedly arranged outside the inner core ring, and the length of each overhanging beam is shorter than that of the edge main beam; two ends of the edge main beam are respectively connected with the overhanging beam of the inner core ring and the concrete foundation; and the inner side of the top end of the concrete foundation is provided with a groove for accommodating the edge main beam and the edge secondary beam.

Description

Assembled steel structure roof and assembling construction method thereof

Technical Field

The invention relates to the field of foundation pit pile anchor support, in particular to an assembled steel structure roof and an assembling construction method thereof.

Background

At present, in some large-scale public building projects, buildings with unique appearance and hollow interior are frequently encountered, the hollow space in the buildings is large and is through up and down, and the roof structure is generally designed into a steel structure lighting glass roof in consideration of large span and lighting requirements. Although the steel structure of the roof is simple in appearance, the roof is higher in hollow height and larger in area due to the fact that the steel structure of the roof is located at the inner top of a building, the steel structure of the roof is heavy in self weight, and installation difficulty can be known. When the engineering steel structure roof is installed, large-scale hoisting equipment cannot enter indoor hoisting, and the tower crane is dismantled as well as is a difficult problem when the indoor tower crane hoisting is set, and the construction method commonly used by the large-span steel structure is not suitable for the engineering such as integral lifting (jacking), integral hoisting, sliding construction and other processes, although the construction methods of full framing, segmented hoisting and high-altitude assembly are suitable, the integral hoisting of the steel structure is difficult, the input amount of turnover materials is very large, and the integral construction period is long. The high and large assembled steel structure roof is widely applied to large public building engineering, but the existing high and large roof steel structure construction has the problems of large self weight of steel members, difficulty in hoisting, large input amount of turnover materials, long construction period, difficulty in installation and maintenance, high cost and the like. Therefore, the design of the tall and large roof steel structure and the assembling construction method thereof, which have the advantages of simple structure, convenience in installation and maintenance, low turnover material investment and short construction period, has important practical significance.

Disclosure of Invention

The invention aims to provide an assembled steel structure roof and an assembling construction method thereof, which have the advantages of simple structure, convenience in installation and maintenance, low turnover material investment and short construction period, aiming at the problems of large self weight of steel members, difficulty in hoisting, large turnover material input amount, long construction period, difficulty in installation and maintenance, high cost and the like in the construction of the conventional assembled steel structure roof.

In order to achieve the purpose, the invention is realized by the following technical scheme: an assembled steel structure roof comprises a concrete foundation and a steel structure roof body, wherein the concrete foundation is formed by combining a plurality of stand columns and circular ring beams; the steel structure roof body comprises an inner core ring positioned in the middle, a plurality of edge main beams uniformly distributed on the periphery of the inner core ring, a plurality of arc main beams detachably arranged between the two edge main beams, edge secondary beams with two ends detachably connected with the arc main beams and the concrete foundation respectively, and a plurality of arc secondary beams detachably arranged between the edge secondary beams and the edge main beams; a plurality of overhanging beams with the same number as the edge main beams are uniformly and fixedly arranged outside the inner core ring, and the length of each overhanging beam is shorter than that of the edge main beam; two ends of the edge main beam are respectively connected with the overhanging beam of the inner core ring and the concrete foundation; and the inner side of the top end of the concrete foundation is provided with a groove for accommodating the edge main beam and the edge secondary beam.

Preferably, the inner core ring is provided with a cross beam to enhance structural strength and rigidity; the upper end surfaces of the cross beam arms are provided with lifting bolts symmetrically distributed along the width direction; the eye bolt is U-shaped.

Preferably, the main bodies of the overhanging beam, the edge main beam, the arc main beam, the edge secondary beam and the arc secondary beam of the inner core ring are all I-shaped beams.

Preferably, the inner core ring and the edge main beam, the edge main beam and the arc main beam, the edge main beam and the edge secondary beam, the arc main beam and the edge secondary beam, and the arc secondary beam and the edge secondary beam are all connected by the same thread, and the connecting I-beam webs are connected by using the mounting plate, the high-strength bolt, the gasket and the nut.

Preferably, the through holes on the longitudinal plates at the joints of the two ends of the arc-shaped main beam and the adjacent edge main beams and the mounting plates at the joints of the middle overhanging beam and the edge secondary beam of the arc-shaped main beam are distributed in 9 rows and 2 columns, and the diameter of each through hole is 1-2mm larger than that of each high-strength bolt.

Preferably, through holes on a longitudinal plate at the joint of the edge main beam and the outer extension beam of the inner core ring, the joint of the edge main beam and the arc main beam and the joint of the edge main beam and the arc secondary beam are distributed in 9 rows and 2 columns, through holes on a bottom plate at the joint of the edge main beam and the concrete foundation are distributed in 4 rows and 4 columns, 4 rows and 2 columns are respectively arranged along two sides of the width direction of the edge main beam, and the diameter of each through hole is 1-2mm larger than that of each high-strength bolt; the number of the arc-shaped main beams is 8, through holes on the longitudinal plates at the joints of the two ends of the arc-shaped main beams and the adjacent edge main beams and on the longitudinal plates at the joints of the middle extension beams and the edge secondary beams of the arc-shaped main beams are distributed in 2 rows and 2 columns, and the diameter of each through hole is 1-2mm larger than that of each high-strength bolt.

Preferably, the number of the arc-shaped main beams is 8; the number of edge girders is 8; the number of the edge secondary beams is 8; the number of arc-shaped secondary beams is 16.

Preferably, the joint of the groove of the concrete foundation and the edge main beam and the edge secondary beam is provided with an embedded steel plate.

Preferably, through holes which are the same as the connection positions of the edge main beams and the concrete foundation in distribution are formed in the embedded steel plates; the upper ends of the embedded bolts are provided with threads and extend out of the upper part of the embedded steel plate; the lower part is provided with a hook which is fixed in the concrete foundation.

An assembling construction method of an assembled steel structure roof comprises the following steps:

s1, pulling the inner heart ring integral component to the center of the bottom layer of the middle hall, and simultaneously transporting the edge secondary beam, the arc-shaped main beam, the edge main beam and the arc-shaped secondary beam to a region to be hung of the main structure;

s2, erecting a lattice column support in the inner core ring integral component, symmetrically mounting four-hand pulling hoists on a cross beam at the top of the support, and mounting lifting eye bolts on the inner core ring integral component;

s3, pulling the inner core ring integral component to a preset height through four symmetrical hand-pulled hoists at the top of the lattice column support, and temporarily fixing the inner core ring integral component by using a welding bracket;

s4, installing a mast crane on the lattice column support, wherein the mast crane is supported by a single rod, and the hoisting point of the mast crane is arranged near the installation center of the edge girder;

s5, firstly, hoisting and temporarily fixing the four edge main beams to control the overall installation size deviation of the roof system, and then installing the other four edge main beams in the same steps;

s6, correcting the positions of the 8 installed edge main beams, and fastening the 8 installed edge main beams through high-strength bolts after confirmation;

s7, hoisting the rest arc main beams, the edge secondary beams and the arc secondary beams in place, and assembling and connecting the arc main beams, the edge secondary beams and the arc secondary beams by high-strength bolts;

and S8, removing the lower latticed column bracket.

The invention has the following beneficial effects:

1. compared with the existing fabricated steel structure roof, the self-weight is lighter, the section of the member is smaller, the I-shaped steel is adopted as the steel structure main body, the pollution of waste to the environment is reduced, the material is a green recyclable building material, the ecological environment-friendly requirement is met, and the current environment-friendly situation is met.

2. The fabricated steel structure roof is prefabricated in a factory and combined on site, the assembly precision and the welding quality of components are improved, and common quality problems of welding of steel components on site are prevented.

3. The fabricated steel structure roof is short in construction period, difficult to install and maintain and low in cost.

4. The assembly construction method of the assembled steel structure roof has the advantages that the hoisting equipment is simple to install, and the input amount of turnover materials is small; and can be recycled for a plurality of times.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

FIG. 1 is a schematic view of the assembly of the assembled steel structural roof of the present invention;

FIG. 2 is a schematic view of a steel structural roofing body of the present invention;

FIG. 3 is a schematic view of the assembly of the inner core ring and the edge main beam of the present invention;

FIG. 4 is a schematic view of the connection of the edge main beam and the outrigger of the present invention;

FIG. 5 is a schematic view of the assembly of the edge main beam, the edge secondary beam, the arc main beam and the arc secondary beam of the present invention;

FIG. 6 is a schematic view of the installation of the edge girder and concrete foundation of the present invention;

FIG. 7 is a schematic view of the edge girder and concrete foundation installation of the present invention;

FIG. 8 is a schematic view of the installation of an eye bolt and an inner core ring of the present invention;

fig. 9 is a schematic view of the hoisting inner core ring of the lattice column support bracket of the invention.

In the figure, 1, a concrete foundation; 2. an edge secondary beam; 3. an arc-shaped main beam; 4. an edge main beam; 5. an arc-shaped secondary beam; 6. an inner core ring; 7. an eye bolt; 8. a lifting ring gasket; 9. a lifting eye nut; 10. a nut; 11. mounting a plate; 12. a high strength bolt; 13. a gasket; 14. pre-burying a steel plate; 15. embedding bolts in advance; 16. a cross beam; 17. a chain block; 18. a lattice column; 19. a bracket; 20. a base plate; 21. a baseplate bolt.

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.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

Please refer to fig. 1-9;

1. in order to reduce the variety and the quantity of parts and the installation difficulty of the structure, all the threaded connections in the structure adopt the same specification, including tooth type, middle diameter, large diameter, small diameter, lead, thread number, screwing direction and the like, and the length of the threads is determined according to the requirements of the structure.

2. The same threaded connection scheme is adopted among the inner core ring 6, the edge main beam 4, the arc main beam 4, the edge secondary beam 2, the arc main beam 3, the edge secondary beam 2 and the arc secondary beam 5, the edge secondary beam 2, the mounting plates 11 are clamped on two sides of a web plate of the I-beam to be connected, and the longitudinal mounting plates 11, the high-strength bolts 12, the gaskets 13 and the nuts 10 are used for connection.

3. A plurality of extending beams are arranged at the periphery of the inner core ring 6. The edge main beam 4 is connected with the inner core ring 6 through an extension beam of the inner core ring 6. A plurality of uniformly distributed through holes with the diameter matched with that of the high-strength bolt 12 are arranged on the extending beam of the inner core ring 6 close to the joint with the edge main beam 4. In the embodiment, the number of the extending beams of the inner core ring 6 is 8, the through holes arranged on the extending beams of the inner core ring 6 and close to the connection part with the edge main beam 4 are uniformly distributed in 9 rows and 2 columns, and the diameter of each through hole is 1-2mm larger than that of the high-strength bolt.

4. The inner core ring 6 is internally provided with a cross beam to strengthen the structural strength and rigidity. Through holes symmetrically distributed in the width direction are formed in 4 beam arms of the crossed beam and used for installing lifting bolts 7. The eye bolt 7 is of a U-shaped construction. During installation, the suspension bolts 7 are respectively inserted into through holes distributed on 4 beam arms of the cross beam of the inner core ring 6 from the top, and suspension ring gaskets 8 and 2 suspension ring nuts 9 are respectively installed upwards from the bottom, so that the locking of threaded connection is realized.

5. The main body of the edge main beam 4 is an I-beam. One end of the edge main beam 4 is connected with the extending beam of the inner core ring 6, and the other end is connected with the concrete foundation 1. The longitudinal mounting plate 11 is arranged at the joint of the middle of the edge main beam 4 and the arc main beam 3 and the arc secondary beam 5, so that the edge main beam 4 is respectively connected with the arc main beam 3 and the arc secondary beam 5. On the edge main beam 4, a plurality of uniformly distributed through holes with the diameter matched with that of the high-strength bolt 12 are arranged on the longitudinal mounting plate 11 at the joint of the edge main beam 4 and the overhanging beam of the inner core ring 6, the joint of the edge main beam 3 and the arc-shaped secondary beam 5 and the floor at the joint of the edge main beam and the concrete foundation 1. In the embodiment, the number of the edge main beams is 8, through holes on the longitudinal mounting plate 11 at the joints of the edge main beams 4 and the overhanging beam of the inner core ring 6, the joints of the edge main beams 4 and the arc main beams 3, and the joints of the edge main beams 4 and the arc secondary beams 5 are distributed in 9 rows and 2 columns, through holes on the embedded steel plate 14 at the joints of the edge main beams 4 and the concrete foundation 1 are distributed in 4 rows and 4 columns, 4 rows and 2 columns are respectively arranged along two sides of the width direction of the edge main beams 4, and the diameter of each through hole is 1-2mm larger than that of the high-strength bolt 12.

6. The main body of the arc-shaped main beam 3 is obtained by bending an I-beam. The two ends of the arc-shaped main beam 3 are respectively connected with the adjacent edge main beams 4, and the middle part of the arc-shaped main beam is provided with an extending beam so as to be convenient for the edge secondary beam 2 to be connected. A plurality of uniformly distributed through holes with the diameter matched with that of the high-strength bolt 12 are arranged on the longitudinal mounting plate 11 at the joint of the two ends of the arc-shaped main beam 3 and the adjacent edge main beam 4 and the longitudinal mounting plate 11 at the joint of the middle extension beam of the arc-shaped main beam 3 and the edge secondary beam 2. In the embodiment, the number of the arc-shaped main beams 3 is 8, through holes on the longitudinal mounting plates 11 at the joints of the two ends of the arc-shaped main beams 3 and the adjacent edge main beams 4 and on the longitudinal mounting plates 11 at the joints of the middle extension beams of the arc-shaped main beams 3 and the edge secondary beams 2 are distributed in 9 rows and 2 columns, and the diameter of each through hole is 1-2mm larger than that of each high-strength bolt 12.

7. The main body of the edge secondary beam 2 is an I-beam. One end of the edge secondary beam 2 is connected with the extending beam of the arc-shaped main beam 3, and the other end is connected with the concrete foundation 1. The longitudinal installation plate 11 is arranged at the joint of the middle of the edge secondary beam 2 and the arc secondary beam 5, so that the edge secondary beam 2 is connected with the arc secondary beam 5. On the edge secondary beam 2, a plurality of uniformly distributed through holes with the diameter matched with that of the high-strength bolt 12 are arranged on the longitudinal mounting plate 11 at the joint of the extension beam of the arc-shaped main beam 3 and the joint of the arc-shaped secondary beam 5 and the embedded steel plate 14 at the joint of the concrete foundation 1. In this embodiment, the number of the edge secondary beams 2 is 8, the through holes on the longitudinal mounting plate 11 at the joint of the edge secondary beam 2 and the overhanging beam of the arc-shaped main beam 3 and the joint of the edge secondary beam 2 and the arc-shaped secondary beam 5 are distributed in 9 rows and 2 columns, the distribution of the through holes at the joint of the edge secondary beam 2 and the concrete foundation 1 is the same as that of the through holes at the joint of the edge main beam 4 and the concrete foundation 1, the through holes are distributed in 4 rows and 4 columns on the embedded

steel plate

14, 4 rows and 2 columns are respectively arranged along the two sides of the edge secondary beam 2 in the width direction, and the diameter of the through holes is 1-2mm larger than that of the high-.

8. The arc-shaped secondary beam 5 main body is obtained by bending an I-shaped beam. Two ends of the arc secondary beam 5 are respectively connected with the adjacent edge main beam 4 and the edge secondary beam 2. The longitudinal mounting plates 11 at the joints of the two ends of the arc-shaped main beam 3 and the adjacent edge main beam 4 and the edge secondary beam 2 are respectively provided with a plurality of uniformly distributed through holes with the diameter matched with that of the high-strength bolt 12. In the embodiment, the number of the arc-shaped secondary beams 5 is 16, through holes on the longitudinal mounting plate 11 at the joints of the two ends of the arc-shaped secondary beams 5 and the adjacent edge main beams 4 and the edge secondary beams 2 are distributed in 9 rows and 2 columns, and the diameter of each through hole is 1-2mm larger than that of each high-strength bolt 12.

9. The embedded steel plate 14 is provided with through holes which are distributed at the same positions as the joints of the edge main beams 4 and the concrete foundation 1, taper holes are processed at the lower sides of the through holes, and the diameters of the through holes are the same as the optical axis parts of the embedded bolts 15. During manufacturing, the embedded bolts 15 are inserted into the through holes in the embedded steel plates 14, the tail portions of the embedded bolts 15 are located on the same side as the taper holes in the embedded steel plates 14, and the embedded bolts 15 and the embedded steel plates 14 are welded firmly. Before the concrete foundation 1 is poured, the welded embedded steel plates 14 and the embedded bolts 15 are embedded into the concrete foundation 1.

10. The lattice column support is composed of a bottom plate 20, bottom plate bolts 21, lattice column upright posts 18, I-shaped steel cross beams 16 and a chain block 17. The number of the lattice column 18, the I-steel beam 16 and the chain block 17 is 4, and the lattice column, the I-steel beam and the chain block are uniformly distributed. The bottom plate 20 is provided with a plurality of through holes with the same diameter of the bottom plate bolts 21, taper holes are processed at the lower sides of the through holes, and the bottom plate bolts 21 are firmly welded after being inserted into the corresponding holes on the bottom plate 20. During civil engineering, the bottom plate 20 welded with the bottom plate bolts 21 is embedded in the concrete foundation 1 according to the installation position of the inner core ring 6, and the top surface of the bottom plate 20 is ensured to be horizontal. The latticed column 18, the I-steel beam 16 and the chain block 17 are prepared before construction and are installed during construction.

11. The lattice column 18 is formed by welding steel pipes, angle steels and plates. The left and right sides of 18 direction of height of lattice column stand comprises 2 steel pipes that stand, and it has 2 steel pipes that the level was placed to be close to the welding of bottom and top, and the pipe diameter is the same with the steel pipe that stands, and the middle section part is formed by angle steel welding, including horizontal pole and diagonal member to reinforcing structural rigidity and intensity, the horizontal pole can be used to install the scaffold frame simultaneously. The quantity and the position of the cross rods and the diagonal draw bars of the middle section part are determined according to the height of the lattice column upright post 18. The bottom of 2 standing steel pipes on the left and right sides of the lattice column upright post 18 is respectively welded with 4 triangular plates uniformly distributed along the circumference, and the triangular plates are used as reinforcing ribs for increasing the structural strength and rigidity.

12. During assembling construction, the inner core ring 6 is placed on the bottom plate 20, the posture and the position of the inner core ring 6 are adjusted according to installation requirements, meanwhile, other edge main beams 4, edge secondary beams 2, arc main beams 3 and arc secondary beams 5 are conveyed to a main structure to-be-hung area, and lattice column stand columns 18, I-shaped steel cross beams 16 and chain blocks 17 which are components of the lattice column support are conveyed to the position of the inner core ring 6. And then, mounting the lattice column support, sequentially inserting 4 lattice column stand columns 18 into 4 through holes in the inner core ring 6 and uniformly distributing the stand columns along the circumference, firmly welding the bottoms of the lattice column stand columns 18 on a bottom plate 20, firmly welding 2 adjacent lattice column stand columns 18 by using I-shaped steel cross beams 16, and mounting chain blocks 17 on the I-shaped steel cross beams 16. And then the lifting ropes of the chain blocks 17 are sequentially sleeved on the corresponding 4 lifting bolts 7 arranged on the inner core ring 6, after the chain blocks 17 are started to adjust the height and the posture of the inner core ring 6 to enable the inner core ring 6 to be positioned at the target installation position, temporary brackets 19 are welded at the contact positions of the lattice column support and the bottom of the inner core ring 6, so that the inner core ring 6 is fixed temporarily. After the inner core ring 6 is temporarily fixed, a mast crane is arranged on the lattice column support, and 8 edge main beams 4 are sequentially hoisted by the mast crane. Every 1 edge girder 4 of hoist and mount, fix temporarily earlier to control whole installation size deviation. Position correction is performed after the 8 edge main beams 4 are in place. After the position is confirmed, 8 edge main beams 4 and the concrete foundation 1 are fastened by using the gasket 13 and the nut 10, and high-strength thread fastening between the edge main beams 4 and the inner core ring 6 is realized by using the web plate 11, the high-strength bolt 12, the gasket 13 and the nut 10. After 8 edge main beams 4 are fastened, 8 arc main beams 3, 8 edge secondary beams 2 and 16 arc secondary beams 5 are sequentially installed. After the integral roof steel structure is installed, the temporary bracket 19, the chain block 17, the I-shaped steel beam 16 and the lattice column stand column 18 are sequentially removed.

The concrete construction key points are as follows:

(1) lattice column support base installation and lower concrete structure reinforcement

The bottom of the lattice column support base is made of 30 thick steel plates 4000X 4000, the lower parts of the steel plates are made of C30 fine stone concrete to level the horizontal gaps between the leveling layer and the floor, so that the steel plates are evenly stressed, in order to ensure the hoisting safety of the inner frame, 8 lattice column upright posts 18 are additionally arranged under the floor except for a phi 900 core column to be tightly propped against the floor, the steel lattice frame adopts 8 phi 159X 6 horizontal supports and inclined supports to be connected into a lattice structure body, the steel lattice structure body corresponds to the upper hanging bracket system rod piece, and the steel plate under the steel pipe adopts 400X 20 steel plates.

(2) Integral component of inner core ring of roof in place

The inner core ring 6 integral component is paved with two steel beams with 4U-steel channels and 6 m through length by a laying chute, and the two steel beams are paved on a concrete slope (including an indoor central area) by replacing the two steel beams as a track, and are pulled to a preset position by a steel wire rope and a 3-ton winch.

(3) Lattice column support mounting

The lattice column support mounting is to be installed inside the inner core ring integral component, and the inner core ring 6 integral component traction can be carried out after the lattice column support mounting is completed.

The lattice column support hanger adopts phi 159 multiplied by 6 pipes, the phi 159 multiplied by 6 pipes are needed to be connected with each other in length of 9m, the joints are staggered to be more than or equal to 2000m, firstly, the single pipes are manufactured into 4 pieces, then, sixty tons of tower cranes are used for matching installation, an annular scaffold is erected outside a core tube, the upper pipe is butted on the scaffold through two joints, and the phi 159 multiplied by 6 main upright rods are butted to ensure concentric circles and are reinforced in sections.

The four groups of the double-support phi 159 multiplied by 6 upright rods are vertically arranged at equal intervals, and the middle part of the double-support phi 159 multiplied by 6 upright rods can pass through the interval of the circular arc overhanging flange plates of the integral component of the inner core ring 6. The phi 159 multiplied by 6 steel pipes form a regular polygon, and each side of the regular polygon is connected with a shear support in a cross way at the height. The closing plane of the top uses 125I-steel as a beam, and is placed on the top of the end part of the steel pipe and welded.

The phi 159 multiplied by 6 lattice column support system used for supporting the integral component of the inner core ring 6 is installed section by section from bottom to top, phi 48 multiplied by 3 steel pipe double-row scaffolds are pre-erected on the periphery, the horizontal distance is 1500mm, the step pitch is 2000mm, a row of scaffold is erected when the erected central point of the scaffold is 1.5m in radius outwards, and a row of round scaffold is erected outside the phi 108 upright rod for installing support and connecting the upright rod. Along with the rising of support frame, the scaffold risees in advance and guarantees the installation and use.

The phi 159X 6 pipe and the pipe joint are welded in a butt welding mode and are concentrically connected, welding quality is guaranteed, integral stress is consistent, and the pipe is hoisted by vertically hoisting by a 60-ton tower crane used for main structure construction and is installed in a supporting mode. And the horizontal and shear diagonal tension support between the vertical rods is temporarily fixed at any time.

(4) Lifting traction of inner core ring integral component

After the lattice column support is installed, 4 lifting points are symmetrically arranged on the whole 6 body components of the inner core ring, and four-point average upward traction is manually carried out through 4 5T chain blocks 17 hung on 4I-steel cross beams 16 at the top of the support. When the traction is started, when the member is lifted to 200mm from the ground, the working conditions of all parts are comprehensively observed, and after all inspection, the member slowly rises after no problem is found. The level of the workpiece must be checked at any time in the upward movement process, and the condition that the single hoist is overweight and stressed unstably due to the fact that the component inclines is prevented, and major safety accidents are caused. Here, levelness measurement is performed, and it is specified that when the height of a certain direction is more than or equal to 50mm, the upward traction of the direction should be stopped, and the upward traction of the direction should be performed from other three places, and the leveling is corrected. The ideal lifting effect is achieved by continuously drawing, ensuring the workpiece to be horizontal and evenly exerting force.

Because the installation height of the component is higher, the component must be lifted in sections for multiple times, one bracket supporting component conversion hanging layer is required to be arranged on each side of phi 159 multiplied by 6, and a stiffening plate is required to be arranged below each bracket to ensure that the component load is borne. And simultaneously, the steel beam is locked by a lock catch for a circle of the thick steel wire rope ring member and is fixed with the upper steel beam. After the upper 5 tons of hoisting block guys are reset and lifted to the fixed steel wire rope without stress, the stable steel wire rope and the bracket 19 are removed, and the fixed steel wire rope is lifted along with the component. The inner core ring 6 integral component is lifted once in a reciprocating way by three to four meters. After the hoisting of the integral member of the inner core ring 6 is finished, temporary fixing is carried out so as to facilitate the installation of other steel beams.

(5) Lattice column support upper mast crane and top temporary hoisting point installation

After the integral member of the inner core ring 6 is hoisted in place, a mast crane is arranged on the lattice column support, the mast crane adopts a phi 108 multiplied by 4 single inclined upright rod, the inclined upright rod support legs are connected with the main upright rod of the lattice column support through anchor ears, and the upper end of the inclined upright rod of the mast crane is fixed with the lattice column support through a double-channel steel wire rope in a pulling way. The mast crane is hoisted in a form of adding a steel wire rope to a pulley, the steel wire rope is in a diameter phi of 17mm, and the steel wire rope is dragged by a winch.

The top of the lattice column support adopts a double-spliced phi 108 multiplied by 4 steel pipe carrying pole type lifting point as a temporary lifting point of a beam end when a steel main beam is lifted. The double-spliced steel pipe is connected with the cross beam 16 at the top of the lattice column support through a bolt buckle, so that the stability of the hoisting point is ensured.

(6) Hoisting edge main beam

A lifting lug is arranged at the gravity center of the edge main beam 4, the main beam is lifted by a mast crane, when the component is lifted 200mm away from the ground during the lifting, the working conditions of all parts are comprehensively observed, and the component is slowly lifted after all inspection is carried out, and no problem is found. The two ends of the edge main beam 4 are pulled by a rope with a special person to prevent the main beam from swinging. After the edge main beam 4 is hoisted to a certain height, the beam is installed by matching with temporary hoisting points at two ends of the beam. During hoisting, the four through edge main beams 4 are sequentially hoisted and lifted to the positions of the elevations of the integral component of the inner core ring 6, the web plates and the temporary fixing bolts are adopted to be in butt joint with the integral component of the inner core ring 6 for temporary fixing, and the other four edge main beams 4 are installed in the same steps.

After the edge main beam 4 is installed, the position height, the central position, the slope, the vault and the main beam and main body connecting stud elevation of the installed 8 edge main beams 4 are measured, after repeated correction and confirmation, the temporary bolt is replaced by the high-strength bolt 12, and initial screwing, intermediate screwing and final screwing are carried out. And the flange of the steel beam is welded and drawn from bottom to top, so that the whole steel structure daylighting roof forms a complete stable rigid system.

(7) Hoisting of arc main beam and edge secondary beam

The arc main beam 3, the edge secondary beam 2 and the arc secondary beam 5 are hoisted by a tower crane and matched by a chain block 17, and the high-strength bolts 12 are assembled and connected in place. And after all the components are installed, spraying fireproof and antirust paint on the components.

(8) Lattice column support removal

The lattice column support is removed along with the descending of the support system and the layer, the phi 159 multiplied by 6 support system is removed according to a section of 6-8m, the welded joint position is cut off by C2H2-O2 gas cutting, the framework is lifted into small pieces (less than or equal to 1000kg) by a tower crane, and then the small pieces fall on the indoor floor wooden pillow with 2 layers, are cleaned outwards and are removed downwards in a circulating way. When the steel pipe frame is dismantled, a specially-assigned person is required to conduct and monitor, and when the upper part does not operate, the lower part is used for cleaning the steel pipe frame. Meanwhile, the work of preventing the member from falling is well done.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides an assembled steel construction roofing which characterized in that: the roof comprises a concrete foundation (1) and a steel structure roof body which is detachably connected to the concrete foundation (1); the steel structure roof body comprises an inner core ring (6) positioned in the middle, a plurality of edge main beams (4) uniformly distributed on the periphery of the inner core ring (6), a plurality of arc main beams (3) detachably arranged between the two edge main beams (4), edge secondary beams (2) with two ends respectively detachably connected with the arc main beams (3) and the concrete foundation (1), and a plurality of arc secondary beams (5) detachably arranged between the edge secondary beams (2) and the edge main beams (4); a plurality of extension beams with the same number as the edge main beams (4) are uniformly and fixedly arranged outside the inner core ring (6), and the length of each extension beam is shorter than that of each edge main beam (4); two ends of the edge main beam (4) are respectively connected with the extending beam of the inner core ring (6) and the concrete foundation (1); the concrete foundation is characterized in that a groove for accommodating the edge main beam (4) and the edge secondary beam (2) is formed in the inner side of the top end of the concrete foundation (1).

2. An assembled steel structural roof as claimed in claim 1, wherein: the inner core ring (6) is provided with a cross beam to enhance the structural strength and rigidity; the upper end surfaces of the cross beam arms are provided with lifting eye bolts (7) which are symmetrically distributed along the width direction; the shape of the lifting bolt (7) is U-shaped.

3. An assembled steel structural roof as claimed in claim 1, wherein: the main bodies of the extending beam, the edge main beam (4), the arc main beam (3), the edge secondary beam (2) and the arc secondary beam (5) of the inner core ring (6) are I-shaped beams.

4. An assembled steel structural roof as claimed in claim 3, wherein: the inner core ring (6) is connected with the edge main beam (4), the edge main beam (4) and the arc main beam (3), the edge main beam (4) and the edge secondary beam (2), the arc main beam (3) and the edge secondary beam (2), the arc secondary beam (5) and the edge secondary beam (2) through the same threads, and the mounting plate (11), the high-strength bolt (12), the gasket (13) and the nut (10) are utilized to connect the web plates of the I-shaped beams which are connected.

5. An assembled steel structural roof as claimed in claim 4, wherein: the through holes in the mounting plates (11) at the joints of the two ends of the arc-shaped main beam (3) and the adjacent edge main beam (4) and the joints of the middle overhanging beam and the edge secondary beam (2) of the arc-shaped main beam (3) are distributed in 2 rows and 2 columns, and the diameter of each through hole is 1-2mm larger than that of each high-strength bolt (12).

6. An assembled steel structural roof as claimed in claim 5, wherein: through holes in the longitudinal plate at the joint of the edge main beam (4) and the overhanging beam of the inner core ring (6), the joint of the edge main beam (4) and the arc main beam (3), and the joint of the edge main beam (4) and the arc secondary beam (5) are distributed in 9 rows and 2 columns, through holes in the bottom plate at the joint of the edge main beam (4) and the concrete foundation (1) are distributed in 4 rows and 4 columns, 4 rows and 2 columns are respectively arranged along the two sides of the width direction of the edge main beam (4), and the diameter of each through hole is 1-2mm larger than that of the high-strength bolt (12); the number of the arc-shaped main beams (3) is 8, through holes on the longitudinal plates at the joints of the two ends of the arc-shaped main beams (3) and the adjacent edge main beams (4) and the longitudinal plates at the joints of the middle extension beams of the arc-shaped main beams (3) and the edge secondary beams (2) are distributed in 2 rows and 2 columns, and the diameter of each through hole is 1-2mm larger than that of each high-strength bolt (12).

7. An assembled steel structural roof as claimed in claim 1, wherein: the number of the arc-shaped main beams (3) is 8; the number of the edge main beams (4) is 8; the number of the edge secondary beams (2) is 8; the number of the arc-shaped secondary beams (5) is 16.

8. An assembled steel structural roof as claimed in claim 3, wherein: the concrete foundation is characterized in that an embedded steel plate (14) is arranged at the joint of the groove of the concrete foundation (1) and the edge main beam (4) and the edge secondary beam (2), and the embedded steel plate (14) is embedded.

9. An assembled steel structural roof as claimed in claim 5, wherein: the embedded steel plate (14) is provided with through holes which are distributed at the same positions as the connection positions of the edge main beam (4) and the concrete foundation (1); the upper ends of the embedded bolts (15) are provided with threads and extend out of the upper part of the embedded steel plate (14); the lower part is provided with a hook which is fixed in the concrete foundation (1).

10. An assembling construction method of an assembled steel structure roof, which is based on the assembled steel structure roof of any one of the claims 1 to 9, is characterized by comprising the following steps:

s1, pulling the integral component of the inner core ring (6) to the central part of the bottom layer of the middle hall, and simultaneously transporting the edge secondary beam (2), the arc-shaped main beam (3), the edge main beam (4) and the arc-shaped secondary beam (5) to a region to be hung of the main structure;

s2, erecting a lattice column support in the integral component of the inner core ring (6), symmetrically installing four hand-pulled blocks (17) on a cross beam (16) at the top of the support, and installing lifting eye bolts (7) on the integral component of the inner core ring (6);

s3, pulling the gourd (17) by four symmetrical hands at the top of the lattice column bracket to draw the whole component of the inner core ring (6) to a preset height, and temporarily fixing the component by a welding bracket (19);

s4, mounting a mast crane on the lattice column support, wherein the mast crane is supported by a single rod, and the hoisting point of the mast crane is arranged near the mounting center of the edge main beam (4);

s5, firstly, hoisting and temporarily fixing the four edge main beams (4) to control the integral installation size deviation of the roof system, and then, installing the other four edge main beams (4) in the same steps;

s6, correcting the positions of the 8 installed edge main beams (4), and fastening the edge main beams through high-strength bolts (12) after confirmation;

s7, hoisting the rest arc-shaped main beams (3), the edge secondary beams (2) and the arc-shaped secondary beams (5) in place, and splicing and connecting the arc-shaped main beams with high-strength bolts (12);

and S8, removing the lower latticed column bracket.