CN116971481A - Large-span venue steel structure and construction process thereof - Google Patents
Large-span venue steel structure and construction process thereof Download PDFInfo
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- CN116971481A CN116971481A CN202310758355.6A CN202310758355A CN116971481A CN 116971481 A CN116971481 A CN 116971481A CN 202310758355 A CN202310758355 A CN 202310758355A CN 116971481 A CN116971481 A CN 116971481A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 190
- 239000010959 steel Substances 0.000 title claims abstract description 190
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000010276 construction Methods 0.000 title claims description 41
- 238000003466 welding Methods 0.000 claims abstract description 41
- 238000009434 installation Methods 0.000 claims abstract description 19
- 238000005516 engineering process Methods 0.000 claims abstract description 10
- 238000007689 inspection Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 16
- 238000012937 correction Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 230000011218 segmentation Effects 0.000 claims description 3
- 239000007779 soft material Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/142—Means in or on the elements for connecting same to handling apparatus
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2406—Connection nodes
Abstract
The invention relates to a large-span venue steel structure, which is characterized in that: the system comprises a standard exhibition hall and a login hall; the standard exhibition halls are provided with a pair, the login halls are of T-shaped structures, the standard exhibition halls are respectively arranged on two sides of the login halls, and the standard exhibition halls are symmetrically arranged about the login halls; the net shell structure is optimized to be a hub node, the processing technology is simple, batch manufacturing in factories can be realized, and compared with the net shell structure formed by welding nodes, the method greatly reduces the difficulty of appearance treatment of the net shell; in addition, the net shell rod piece and the hub node are welded mutually, so that the positioning is simple, and the integral quality and the linear control of the structure are better controlled; a special hoisting structure is designed, proper hoisting points are selected, and hoisting data support is given in theory; the special jig frame is adopted, so that the lifting installation risk is reduced, and the lifting precision control problem is solved; the improvement point ensures the installability of hoisting and the profile of the structural assembly meets the design requirement, and reduces the reworking frequency.
Description
Technical Field
The invention relates to the technical field of large-span venue construction processes, in particular to a large-span venue steel structure and a construction process thereof.
Background
With frequent appearance of steel structure roofs with different shapes and continuous improvement of quality, cost and period requirements, higher demands are also put on manufacturing and mounting processes of the steel structure roofs. Based on the increasing demands on architecture, the demands on architecture modeling are also increasing, both to meet basic demands and to meet visual and artistic demands, such as sydney opera house, guangzhou opera house, various gymnasiums, convention centers, etc. However, the development of the building is limited by the structure, and the research direction is changed from the original planar structure system to various space structure systems, so that the latticed shell structure is generated. The novel structure has the characteristics of a rod system structure and a thin shell structure, is reasonable in stress, attractive in appearance and large in coverage span, is a breakthrough in technology, is artistic in technology, is a space structure which is fastest to develop for half a century and has a wide development prospect, and is widely applied at home and abroad.
Reasonable construction scheme and scientific construction process analysis can ensure the safety and economy of the structure. Whether the safety and the forming form of the construction hoisting process of the large-span steel structure meet the design requirements is a problem which needs to be solved.
Disclosure of Invention
The invention aims to solve the technical problems of hidden danger in the general hoisting process of the large-span venue steel structure and the problem that the forming form needs to be adjusted for multiple times.
In order to solve the technical problems, the technical scheme of the invention is as follows: a large-span venue steel structure is provided, which is characterized in that: the system comprises a standard exhibition hall and a login hall; the standard exhibition halls are provided with a pair, the login halls are of T-shaped structures, the standard exhibition halls are respectively arranged on two sides of the login halls, and the standard exhibition halls are symmetrically arranged about the login halls;
the standard exhibition hall comprises an inverted triangle main truss, an inverted triangle secondary truss, an edge sealing single-piece truss, an exhibition hall steel column and a connection steel beam; the exhibition hall steel columns are arranged on the ground in a matrix shape; the connecting steel beams are horizontally arranged and connected between the steel columns of each exhibition hall; the inverted triangle main truss and the inverted triangle secondary truss are respectively arranged on the top ends of the steel columns to form a cuboid frame structure; the edge-sealed single-sheet truss is arranged between adjacent exhibition hall steel columns;
the login hall comprises a middle corridor and an overhanging section, wherein the overhanging section is arranged at the end part of the middle corridor to form a T-shaped structure; the login hall comprises a first layer of steel girder, a second layer of steel girder, a login hall steel column and a top net shell; the steel columns of the login hall are vertically arranged on the ground in a matrix shape, the steel columns of the login hall are positioned between two standard exhibition halls, the top ends of the steel columns of the login hall are provided with basement beam plates, and a layer of steel columns are arranged above the basement beam plates; the first layer of steel beams are arranged at the top ends of the first layer of steel columns, the second layer of steel columns are arranged on the first layer of steel beams, and the second layer of steel beams are horizontally arranged at the top ends of the second layer of steel columns; the top reticulated shell is of a semi-elliptic structure and covers and buckles on the two layers of steel beams.
A construction process of a large-span venue steel structure is characterized by comprising the following innovation points: including standard exhibition hall construction and login hall construction; the specific construction process is as follows:
s1: installing embedded parts: according to the embedded part layout, measuring and paying-off of the embedded part is carried out; when the foundation slab starts to be constructed, the embedded part lofting work is started; if errors are found in the construction size of the template during lofting, timely proposing and requiring correction; the embedded part is connected with the main body concrete structure through anchor bars, the anchor bars of the embedded part are firmly bound with the main body steel bars through spot welding, the allowable error of the embedded part is strictly controlled, namely, the elevation of the supporting surface is less than or equal to +/-3 mm, and the center of the foundation bolt is deviated from the horizontal position by less than or equal to 5mm;
s2: and (3) mounting a steel column: different hoisting machines are selected according to the weight of the steel column, and when the steel column is hoisted, a crane station is positioned at the inner side of a venue and is hoisted at a position close to the steel column; when the basement steel column is hoisted, the crane walks on the top plate of the basement;
s3: and (3) mounting a steel beam: the hoisting adopts single hoisting, the hoisting points are bound by multiple points, and soft materials are filled in the binding points to prevent the steel components from being damaged; during hoisting, firstly hoisting the steel beam about 50cm away from the ground, enabling the center of the steel beam to be aligned with the center of the installation position, then slowly lifting the hook, then rotating the steel beam by using the sliding rope to adjust the position so as to enable the falling hook to be in place, penetrating the bolt into the hole, primarily screwing for temporary fixing, and simultaneously correcting verticality and finally fixing; after the steel beam is corrected, finally screwing the bolts for final fixing;
s4: installation of a login hall: installing a steel column of a login hall of the basement, and paving a basement beam plate at the top end of the steel column of the login hall; the automobile crane is stopped on the basement roof, a layer of steel columns is arranged above the basement roof, a layer of steel beams are hoisted, then two layers of steel columns are hoisted on the layer of steel beams, and then two layers of steel beams and trusses are hoisted on the two layers of steel columns; the pouring construction of the middle corridor first floor slab is completed, a full scaffold is erected, and a truss between two layers of steel columns is continuously installed; hoisting the reticulated shell on the top end of the two-layer steel girder and hoisting the rest two-layer steel girder and the outer truss;
s5: and (3) mounting a standard exhibition hall: respectively hoisting exhibition hall steel columns from two sides, and installing a connection steel beam among the exhibition hall steel columns to ensure that the exhibition hall steel columns are connected into a whole; then hoisting single-piece trusses between steel columns of the exhibition hall; continuously hoisting steel columns, steel beams and single-piece trusses of the exhibition hall in sequence, and forming a longitudinal outer frame structure at the installation position of the standard exhibition hall; then installing a main truss temporary support jig frame in the longitudinal outer frame structure; sequentially hoisting the main trusses and the folding sections of the main trusses, and sequentially hoisting adjacent main trusses on the basis, and installing secondary trusses between the two main trusses to enable the two main trusses to be connected into a whole; and finally, continuously hoisting the primary truss, the secondary truss, the roof connecting beam and the roof structure in sequence to finish the installation of the standard exhibition hall.
Further, the hanging point in the step S2 is arranged at the position of the pre-welded connecting lug plate; in order to prevent the deformation of the lifting lug during lifting, a special lifting fixture is adopted, and a single machine rotation method is adopted for lifting; before hoisting, the steel column should be padded with sleepers to avoid contact between the bottom of the column and the ground during hoisting, and the phenomenon that the end of the column is pulled on the ground during hoisting is avoided; the hoisting holes on the lug plates at the column ends are used for penetrating the clamping rings for fixation, then the hoisting test machine is hoisted, when the root of the steel column is separated from the ground by 200mm, hoisting is stopped, the steel wire ropes, the slings and the clamps are checked, and the hoisting test machine is ensured to be safe and reliable in all aspects and capable of being formally hoisted in the rear.
Furthermore, in the step S5, a temporary support jig frame needs to be erected during truss installation, the temporary support frame needs to ensure the overall stability after the erection, and the temporary support frame is stably reinforced by adopting a rigid support and a cable rope; the coordinate positioning size of the in-place jig template at the top of the temporary support must be ensured, and accurate positioning is performed by using a total station.
In the step S4, the latticed shell is pre-assembled by adopting a segmentation principle; firstly, according to a deepening drawing, the arching requirement of a component is combined, meanwhile, the welding shrinkage is reserved, horizontal projection lines of the net shell are made on the plane of the road base plate, and then the positions of nodes are selected to place the jig frame; after the jig frame is arranged, the rod piece in the width direction of the hoisting net shell is positioned with the jig frame, when the net shell is positioned, the edge difference and the groove gap are noted, and the joint is fixed by a connecting plate; submitting the assembly to a full-time inspector for inspection after the assembly is finished; after the integral check of the net shell is finished, two net shells are welded as a group, the width direction is divided into three sections, and the middle is used as the interpolation.
In the step S5, the single truss is assembled, the jig frame is firstly set, and when the jig frame is set, projection paying-off, elevation line paying-off, inspection line and fulcrum position of X, Y are firstly set on the concrete pavement according to coordinates, and the jig frame is submitted for acceptance and can be used after the experience is accepted; after the assembly jig frame is arranged, the jig frame on the upper chord member and the lower chord member which are manufactured by factories is hung for positioning and assembling, the center line on the platform is required to be fixed during positioning, and a temporary positioning plate is adopted for fixing after meeting the requirements; after the upper chord member and the lower chord member are positioned, the web members are installed, the center line on the platform is required to be fixed during positioning, the groove gap and the plate edge difference at the assembling interface are checked, and after the gap is confirmed, the checking acceptance is submitted, and the assembling record is made; welding, flaw detection and correction detection after welding, after assembly and positioning, the welding is carried out after inspection, symmetrical welding is carried out by adopting a double welder, CO2 gas shielded welding is adopted for welding, the welding is carried out continuously at one time, then flaw detection is carried out according to requirements, then a positioning plate is removed, a hoisting unit is in a free state, then the total station measuring technology is adopted for carrying out comprehensive detection on the assembled and welded hoisting unit, and necessary correction is carried out on the position which does not meet or exceeds the tolerance, so that the assembly precision required by hoisting is met.
Furthermore, the inverted triangle main truss and the inverted triangle secondary truss are manufactured in an assembling mode, a jig frame is firstly arranged, projection paying-off of X, Y is firstly carried out on the concrete ground according to coordinates when the jig frame is arranged, elevation lines, inspection lines and fulcrum positions are put, acceptance is submitted, and the jig frame can be used after experience is accepted; after the assembly jig frame is arranged, the jig frame is hung on the upper chord member and the lower chord member manufactured by a factory in a subsection way for positioning and assembling, the center line and the subsection position line on the platform are required to be positioned, the assembly involution mark at the subsection joint and the groove gap and the plate edge difference at the subsection joint are checked, and a temporary positioning plate is adopted for fixing after meeting the requirements; the truss is assembled in a side-assembling mode, namely chord members are positioned at the left side and the right side of the assembled jig frame; after the upper chord member and the lower chord member are positioned, the web members are installed, the center line and the sectional position line on the platform are required to be fixed during positioning, the groove gap and the plate edge difference at the assembling interface are checked, and after the groove gap and the plate edge difference are confirmed, the inspection acceptance is submitted, and the assembly record is made; after assembly and positioning, checking to be qualified, namely welding, adopting a double welder to perform symmetrical welding, adopting CO2 gas shielded welding, continuously welding at one time, then performing flaw detection according to requirements, dismantling a positioning plate to enable a hoisting unit to be in a free state, then comprehensively detecting the assembled and welded hoisting unit by adopting a total station measuring technology, and performing necessary correction on a position which does not meet or exceeds the tolerance to enable the assembled and welded hoisting unit to meet the assembling precision required by hoisting; repairing the paint after the paint is qualified.
Further, S4: in the installation of a login hall, the overhanging sections are required to be installed simultaneously; firstly, installing a temporary upright post and hoisting a main beam; secondly, hoisting the edge-sealed combined steel beam and the secondary beam; then, hoisting two layers of steel columns; and finally, hoisting the two-layer edge sealing box girder.
The invention has the advantages that:
1) The net shell structure is optimized to be a hub node, the processing technology is simple, batch manufacturing in factories can be realized, and compared with a net shell structure formed by welding nodes, the method greatly reduces the appearance processing difficulty of the net shell; in addition, the net shell rod piece and the hub node are welded mutually, so that the positioning is simple, and the integral quality and the linear control of the structure are better controlled; a special hoisting structure is designed, proper hoisting points are selected, and hoisting data support is given in theory; the special jig frame is adopted, so that the lifting installation risk is reduced, and the lifting precision control problem is solved; the improvement point ensures the installability of hoisting and the profile of the structural assembly meets the design requirement, and reduces the reworking frequency.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a schematic diagram of a large-span venue steel structure login hall according to the present invention.
Fig. 2 is a schematic diagram of a standard exhibition hall of a large-span venue steel structure according to the present invention.
Fig. 3 to 9 are construction state diagrams of a standard exhibition hall of a construction process of a large-span venue according to the present invention.
Fig. 10 to 16 are diagrams showing a construction state of a lobby in a large-span venue construction process according to the present invention.
Fig. 17 is a construction state diagram of a lobby shell of a large-span venue construction process according to the present invention.
Fig. 18 to 20 are reverse delta truss construction views of a large span venue construction process according to the present invention.
Fig. 21 is a block diagram of a temporary support jig for a main truss of a large-span venue construction process according to the present invention.
Fig. 22 is a diagram showing a hoisting state of the latticed shell construction of a large-span venue construction process according to the present invention.
Fig. 23 is a block diagram of a scaffold erected for the latticed shell construction of a large-span venue construction process according to the present invention.
Fig. 24 to 27 are views showing the construction states of overhanging sections of a construction process of a large-span venue according to the present invention.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
A large-span venue steel structure as shown in fig. 1 and 2 comprises a standard exhibition hall 1 and a login hall 2; the standard exhibition halls 1 are provided with a pair of login halls 2, the login halls 2 are of T-shaped structures, the standard exhibition halls 1 are respectively arranged at two sides of the login halls 2, and the standard exhibition halls 1 are symmetrically arranged about the login halls 2;
the standard exhibition hall 1 comprises an inverted triangle main truss, an inverted triangle secondary truss, an edge sealing single-piece truss, an exhibition hall steel column and a connecting steel beam; the steel columns of the exhibition hall are arranged on the ground in a matrix shape; the connecting steel beams are horizontally arranged and connected between the steel columns of each exhibition hall; the inverted triangle main truss and the inverted triangle secondary truss are respectively arranged on the top ends of the steel columns to form a cuboid-shaped frame structure; the edge sealing single-sheet truss is arranged between adjacent exhibition hall steel columns;
the login hall 2 comprises a middle corridor 21 and an overhanging section 22, and the overhanging section 22 is arranged at the end part of the middle corridor 21 to form a T-shaped structure; the login hall 2 comprises a first layer of steel girder, a second layer of steel girder, a login hall steel column and a top net shell; the steel columns of the login hall are vertically arranged on the ground in a matrix shape, the steel columns of the login hall are positioned between two standard exhibition halls, the top ends of the steel columns of the login hall are provided with basement beam plates, and a layer of steel column is arranged above the basement beam plates; the first layer of steel beam is arranged at the top end of the first layer of steel column, the second layer of steel column is arranged on the first layer of steel beam, and the second layer of steel beam is horizontally arranged at the top end of the second layer of steel column; the top net shell is of a semi-elliptic structure and covers and buckles on the two layers of steel beams.
A construction process of a large-span venue steel structure as shown in fig. 3 to 23, including standard exhibition hall construction and login hall construction; the specific construction process is as follows:
s1: installing embedded parts: according to the embedded part layout, measuring and paying-off of the embedded part is carried out; when the foundation slab starts to be constructed, the embedded part lofting work is started; if errors are found in the construction size of the template during lofting, timely proposing and requiring correction; the embedded part is connected with the main body concrete structure through anchor bars, the anchor bars of the embedded part are firmly bound with the main body steel bars through spot welding, the allowable error of the embedded part is strictly controlled, namely, the elevation of the supporting surface is less than or equal to +/-3 mm, and the center of the foundation bolt is deviated from the horizontal position by less than or equal to 5mm;
s2: and (3) mounting a steel column: different hoisting machines are selected according to the weight of the steel column, and when the steel column is hoisted, a crane station is positioned at the inner side of a venue and is hoisted at a position close to the steel column; when the basement steel column is hoisted, a crane walks on the top plate of the basement, and a hoisting point is arranged at a pre-welded connecting lug plate; in order to prevent the deformation of the lifting lug during lifting, a special lifting fixture is adopted, and a single machine rotation method is adopted for lifting; before hoisting, the steel column should be padded with sleepers to avoid contact between the bottom of the column and the ground during hoisting, and the phenomenon that the end of the column is pulled on the ground during hoisting is avoided; the hoisting holes on the lug plates at the column ends are used for penetrating the clamping rings for fixation, then the hoisting test machine is hoisted, when the root of the steel column is separated from the ground by 200mm, hoisting is stopped, the steel wire ropes, the slings and the clamps are checked, and the hoisting test machine is ensured to be safe and reliable in all aspects and capable of being formally hoisted in the rear.
S3: and (3) mounting a steel beam: the hoisting adopts single hoisting, the hoisting points are bound by multiple points, and soft materials are filled in the binding points to prevent the steel components from being damaged; during hoisting, firstly hoisting the steel beam about 50cm away from the ground, enabling the center of the steel beam to be aligned with the center of the installation position, then slowly lifting the hook, then rotating the steel beam by using the sliding rope to adjust the position so as to enable the falling hook to be in place, penetrating the bolt into the hole, primarily screwing for temporary fixing, and simultaneously correcting verticality and finally fixing; after the steel beam is corrected, finally screwing the bolts for final fixing;
s4: installation of a login hall: installing a steel column of a login hall of the basement, and paving a basement beam plate at the top end of the steel column of the login hall; the automobile crane is stopped on the basement roof, a layer of steel columns is arranged above the basement roof, a layer of steel beams are hoisted, then two layers of steel columns are hoisted on the layer of steel beams, and then two layers of steel beams and trusses are hoisted on the two layers of steel columns; the pouring construction of the middle corridor first floor slab is completed, a full scaffold is erected, and a truss between two layers of steel columns is continuously installed; hoisting the reticulated shell on the top end of the two-layer steel girder and hoisting the rest two-layer steel girder and the outer truss; the latticed shell is pre-assembled by adopting a segmentation principle; firstly, according to a deepening drawing, the arching requirement of a component is combined, meanwhile, the welding shrinkage is reserved, horizontal projection lines of the net shell are made on the plane of the road base plate, and then the positions of nodes are selected to place the jig frame; after the jig frame is arranged, the rod piece in the width direction of the hoisting net shell is positioned with the jig frame, when the net shell is positioned, the edge difference and the groove gap are noted, and the joint is fixed by a connecting plate; submitting the assembly to a full-time inspector for inspection after the assembly is finished; after the integral check of the net shell is finished, two net shells are welded as a group, the width direction is divided into three sections, and the middle is used as the embedding; in the installation of a login hall, the overhanging sections are required to be installed simultaneously; as shown in fig. 23 to 26, first, temporary columns are installed, and main beams are hoisted; secondly, hoisting the edge-sealed combined steel beam and the secondary beam; then, hoisting two layers of steel columns; and finally, hoisting the two-layer edge sealing box girder.
S5: and (3) mounting a standard exhibition hall: respectively hoisting exhibition hall steel columns from two sides, and installing a connection steel beam among the exhibition hall steel columns to ensure that the exhibition hall steel columns are connected into a whole; then hoisting single-piece trusses between steel columns of the exhibition hall; continuously hoisting steel columns, steel beams and single-piece trusses of the exhibition hall in sequence, and forming a longitudinal outer frame structure at the installation position of the standard exhibition hall; then installing a main truss temporary support jig frame in the longitudinal outer frame structure; sequentially hoisting the main trusses and the folding sections of the main trusses, and sequentially hoisting adjacent main trusses on the basis, and installing secondary trusses between the two main trusses to enable the two main trusses to be connected into a whole; finally, continuously hoisting the primary truss, the secondary truss, the roof connecting beam and the roof structure in sequence to finish the installation of a standard exhibition hall; when the truss is installed, a temporary support jig frame is required to be erected, the temporary support frame is required to ensure the overall stability after the erection, and the temporary support frame is stably reinforced by adopting a rigid support and a cable rope; the coordinate positioning size of the in-place jig template at the top of the temporary support must be ensured, and accurate positioning is performed by using a total station.
The single truss is assembled, a jig frame is firstly arranged, projection paying-off, elevation line paying-off, inspection line and fulcrum position of X, Y are firstly carried out on a concrete pavement according to coordinates when the jig frame is arranged, acceptance is submitted, and the jig frame can be used after experience acceptance is qualified; after the assembly jig frame is arranged, the jig frame on the upper chord member and the lower chord member which are manufactured by factories is hung for positioning and assembling, the center line on the platform is required to be fixed during positioning, and a temporary positioning plate is adopted for fixing after meeting the requirements; after the upper chord member and the lower chord member are positioned, the web members are installed, the center line on the platform is required to be fixed during positioning, the groove gap and the plate edge difference at the assembling interface are checked, and after the gap is confirmed, the checking acceptance is submitted, and the assembling record is made; welding, flaw detection and correction detection after welding, after assembly and positioning, the welding is carried out after inspection, symmetrical welding is carried out by adopting a double welder, CO2 gas shielded welding is adopted for welding, the welding is carried out continuously at one time, then flaw detection is carried out according to requirements, then a positioning plate is removed, a hoisting unit is in a free state, then the total station measuring technology is adopted for carrying out comprehensive detection on the assembled and welded hoisting unit, and necessary correction is carried out on the position which does not meet or exceeds the tolerance, so that the assembly precision required by hoisting is met.
As shown in fig. 18 to 20, the inverted triangle main truss and the inverted triangle secondary truss are fabricated by splicing, a jig frame is firstly arranged, and the jig frame is arranged on the concrete ground according to coordinatesCarrying out projection paying-off of the pay-off X, Y, paying off the elevation line, the inspection line and the pivot point position, submitting inspection and acceptance, and using the pay-off after the experience is accepted; after the assembly jig frame is arranged, the jig frame is hung on the upper chord member and the lower chord member manufactured by a factory in a subsection way for positioning and assembling, the center line and the subsection position line on the platform are required to be positioned, the assembly involution mark at the subsection joint and the groove gap and the plate edge difference at the subsection joint are checked, and a temporary positioning plate is adopted for fixing after meeting the requirements; the truss is assembled in a side-assembling mode, namely chord members are positioned at the left side and the right side of the assembled jig frame; after the upper chord member and the lower chord member are positioned, the web members are installed, the center line and the sectional position line on the platform are required to be fixed during positioning, the groove gap and the plate edge difference at the assembling interface are checked, and after the groove gap and the plate edge difference are confirmed, the inspection acceptance is submitted, and the assembly record is made; after assembly and positioning, the welding is carried out after the inspection is qualified, and symmetrical welding is carried out by adopting double welders, wherein the welding adopts CO 2 Performing gas shielded welding, namely performing continuous welding at one time, performing flaw detection according to requirements, dismantling the locating plate to enable the hoisting unit to be in a free state, performing comprehensive detection on the assembled and welded hoisting unit by adopting a total station measuring technology, and performing necessary correction on a non-conforming or out-of-tolerance position to enable the assembled and welded hoisting unit to meet the assembly precision required by hoisting; repairing the paint after the paint is qualified.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A large-span venue steel construction, its characterized in that: the system comprises a standard exhibition hall and a login hall; the standard exhibition halls are provided with a pair, the login halls are of T-shaped structures, the standard exhibition halls are respectively arranged on two sides of the login halls, and the standard exhibition halls are symmetrically arranged about the login halls;
the standard exhibition hall comprises an inverted triangle main truss, an inverted triangle secondary truss, an edge sealing single-piece truss, an exhibition hall steel column and a connection steel beam; the exhibition hall steel columns are arranged on the ground in a matrix shape; the connecting steel beams are horizontally arranged and connected between the steel columns of each exhibition hall; the inverted triangle main truss and the inverted triangle secondary truss are respectively arranged on the top ends of the steel columns to form a cuboid frame structure; the edge-sealed single-sheet truss is arranged between adjacent exhibition hall steel columns;
the login hall comprises a middle corridor and an overhanging section, wherein the overhanging section is arranged at the end part of the middle corridor to form a T-shaped structure; the login hall comprises a first layer of steel girder, a second layer of steel girder, a login hall steel column and a top net shell; the steel columns of the login hall are vertically arranged on the ground in a matrix shape, the steel columns of the login hall are positioned between two standard exhibition halls, the top ends of the steel columns of the login hall are provided with basement beam plates, and a layer of steel columns are arranged above the basement beam plates; the first layer of steel beams are arranged at the top ends of the first layer of steel columns, the second layer of steel columns are arranged on the first layer of steel beams, and the second layer of steel beams are horizontally arranged at the top ends of the second layer of steel columns; the top reticulated shell is of a semi-elliptic structure and covers and buckles on the two layers of steel beams.
2. A construction process of a large-span venue steel structure is characterized by comprising the following steps of: including standard exhibition hall construction and login hall construction; the specific construction process is as follows:
s1: installing embedded parts: according to the embedded part layout, measuring and paying-off of the embedded part is carried out; when the foundation slab starts to be constructed, the embedded part lofting work is started; if errors are found in the construction size of the template during lofting, timely proposing and requiring correction; the embedded part is connected with the main body concrete structure through anchor bars, the anchor bars of the embedded part are firmly bound with the main body steel bars through spot welding, the allowable error of the embedded part is strictly controlled, namely, the elevation of the supporting surface is less than or equal to +/-3 mm, and the center of the foundation bolt is deviated from the horizontal position by less than or equal to 5mm;
s2: and (3) mounting a steel column: different hoisting machines are selected according to the weight of the steel column, and when the steel column is hoisted, a crane station is positioned at the inner side of a venue and is hoisted at a position close to the steel column; when the basement steel column is hoisted, the crane walks on the top plate of the basement;
s3: and (3) mounting a steel beam: the hoisting adopts single hoisting, the hoisting points are bound by multiple points, and soft materials are filled in the binding points to prevent the steel components from being damaged; during hoisting, firstly hoisting the steel beam about 50cm away from the ground, enabling the center of the steel beam to be aligned with the center of the installation position, then slowly lifting the hook, then rotating the steel beam by using the sliding rope to adjust the position so as to enable the falling hook to be in place, penetrating the bolt into the hole, primarily screwing for temporary fixing, and simultaneously correcting verticality and finally fixing; after the steel beam is corrected, finally screwing the bolts for final fixing;
s4: installation of a login hall: installing a steel column of a login hall of the basement, and paving a basement beam plate at the top end of the steel column of the login hall; the automobile crane is stopped on the basement roof, a layer of steel columns is arranged above the basement roof, a layer of steel beams are hoisted, then two layers of steel columns are hoisted on the layer of steel beams, and then two layers of steel beams and trusses are hoisted on the two layers of steel columns; the pouring construction of the middle corridor first floor slab is completed, a full scaffold is erected, and a truss between two layers of steel columns is continuously installed; hoisting the reticulated shell on the top end of the two-layer steel girder and hoisting the rest two-layer steel girder and the outer truss;
s5: and (3) mounting a standard exhibition hall: respectively hoisting exhibition hall steel columns from two sides, and installing a connection steel beam among the exhibition hall steel columns to ensure that the exhibition hall steel columns are connected into a whole; then hoisting single-piece trusses between steel columns of the exhibition hall; continuously hoisting steel columns, steel beams and single-piece trusses of the exhibition hall in sequence, and forming a longitudinal outer frame structure at the installation position of the standard exhibition hall; then installing a main truss temporary support jig frame in the longitudinal outer frame structure; sequentially hoisting the main trusses and the folding sections of the main trusses, and sequentially hoisting adjacent main trusses on the basis, and installing secondary trusses between the two main trusses to enable the two main trusses to be connected into a whole; and finally, continuously hoisting the primary truss, the secondary truss, the roof connecting beam and the roof structure in sequence to finish the installation of the standard exhibition hall.
3. A process for constructing a long-span stadium steel structure as recited in claim 2, wherein: the hanging point in the step S2 is arranged at the position of the pre-welded connecting lug plate; in order to prevent the deformation of the lifting lug during lifting, a special lifting fixture is adopted, and a single machine rotation method is adopted for lifting; before hoisting, the steel column should be padded with sleepers to avoid contact between the bottom of the column and the ground during hoisting, and the phenomenon that the end of the column is pulled on the ground during hoisting is avoided; the hoisting holes on the lug plates at the column ends are used for penetrating the clamping rings for fixation, then the hoisting test machine is hoisted, when the root of the steel column is separated from the ground by 200mm, hoisting is stopped, the steel wire ropes, the slings and the clamps are checked, and the hoisting test machine is ensured to be safe and reliable in all aspects and capable of being formally hoisted in the rear.
4. A process for constructing a long-span stadium steel structure as recited in claim 2, wherein: in the step S5, a temporary support jig frame is required to be erected during truss installation, the temporary support frame is required to ensure the overall stability after the erection, and the temporary support frame is stably reinforced by adopting a rigid support and a cable rope; the coordinate positioning size of the in-place jig template at the top of the temporary support must be ensured, and accurate positioning is performed by using a total station.
5. A process for constructing a long-span stadium steel structure as recited in claim 2, wherein: in the step S4, the latticed shell is pre-assembled by adopting a segmentation principle; firstly, according to a deepening drawing, the arching requirement of a component is combined, meanwhile, the welding shrinkage is reserved, horizontal projection lines of the net shell are made on the plane of the road base plate, and then the positions of nodes are selected to place the jig frame; after the jig frame is arranged, the rod piece in the width direction of the hoisting net shell is positioned with the jig frame, when the net shell is positioned, the edge difference and the groove gap are noted, and the joint is fixed by a connecting plate; submitting the assembly to a full-time inspector for inspection after the assembly is finished; after the integral check of the net shell is finished, two net shells are welded as a group, the width direction is divided into three sections, and the middle is used as the interpolation.
6. A large span venue steel structure according to claim 1, wherein: in the S5, the single truss is assembled, a jig frame is firstly arranged, projection paying-off, elevation line paying-off, inspection line and fulcrum position of X, Y are firstly carried out on a concrete pavement according to coordinates when the jig frame is arranged, acceptance is submitted, and the jig frame can be used after experience acceptance is qualified; after the assembly jig frame is arranged, the jig frame on the upper chord member and the lower chord member which are manufactured by factories is hung for positioning and assembling, the center line on the platform is required to be positioned,after meeting the requirements, fixing by adopting a temporary positioning plate; after the upper chord member and the lower chord member are positioned, the web members are installed, the center line on the platform is required to be fixed during positioning, the groove gap and the plate edge difference at the assembling interface are checked, and after the gap is confirmed, the checking acceptance is submitted, and the assembling record is made; welding, flaw detection and correction detection after welding, after assembly and positioning, performing welding after inspection, and performing symmetrical welding by adopting double welders, wherein the welding adopts CO 2 The gas shielded welding is carried out continuously at one time, flaw detection is carried out according to requirements, then the locating plate is dismantled, the hoisting unit is in a free state, then the total station measuring technology is adopted to carry out comprehensive detection on the assembled and welded hoisting unit, and necessary correction is carried out on the position which does not meet or exceeds the tolerance, so that the assembly precision required by hoisting is met.
7. A large span venue steel structure according to claim 1, wherein: the inverted triangle main truss and the inverted triangle secondary truss are manufactured in an assembling mode, a jig frame is firstly arranged, projection paying-off of X, Y is firstly carried out on the concrete ground according to coordinates when the jig frame is arranged, the positions of elevation lines, inspection lines and fulcrums are put, acceptance is submitted, and the jig frame can be used after experience acceptance is qualified; after the assembly jig frame is arranged, the jig frame is hung on the upper chord member and the lower chord member manufactured by a factory in a subsection way for positioning and assembling, the center line and the subsection position line on the platform are required to be positioned, the assembly involution mark at the subsection joint and the groove gap and the plate edge difference at the subsection joint are checked, and a temporary positioning plate is adopted for fixing after meeting the requirements; the truss is assembled in a side-assembling mode, namely chord members are positioned at the left side and the right side of the assembled jig frame; after the upper chord member and the lower chord member are positioned, the web members are installed, the center line and the sectional position line on the platform are required to be fixed during positioning, the groove gap and the plate edge difference at the assembling interface are checked, and after the groove gap and the plate edge difference are confirmed, the inspection acceptance is submitted, and the assembly record is made; after assembly and positioning, checking to be qualified, namely welding, adopting a double welder to perform symmetrical welding, adopting CO2 gas shielded welding, continuously welding at one time, then performing flaw detection according to requirements, dismantling a positioning plate to enable a hoisting unit to be in a free state, then comprehensively detecting the assembled and welded hoisting unit by adopting a total station measuring technology, and performing necessary correction on a position which does not meet or exceeds the tolerance to enable the assembled and welded hoisting unit to meet the assembling precision required by hoisting; repairing the paint after the paint is qualified.
8. A process for constructing a long-span stadium steel structure as recited in claim 2, wherein: the S4: in the installation of a login hall, the overhanging sections are required to be installed simultaneously; firstly, installing a temporary upright post and hoisting a main beam; secondly, hoisting the edge-sealed combined steel beam and the secondary beam; then, hoisting two layers of steel columns; and finally, hoisting the two-layer edge sealing box girder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310758355.6A CN116971481A (en) | 2023-06-26 | 2023-06-26 | Large-span venue steel structure and construction process thereof |
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| CN202310758355.6A CN116971481A (en) | 2023-06-26 | 2023-06-26 | Large-span venue steel structure and construction process thereof |
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