CN115262983B - Large-span steel structure crossed annular pipe truss assembling method - Google Patents
Large-span steel structure crossed annular pipe truss assembling method Download PDFInfo
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- CN115262983B CN115262983B CN202210828950.8A CN202210828950A CN115262983B CN 115262983 B CN115262983 B CN 115262983B CN 202210828950 A CN202210828950 A CN 202210828950A CN 115262983 B CN115262983 B CN 115262983B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000010276 construction Methods 0.000 claims abstract description 47
- 238000000638 solvent extraction Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims description 18
- 210000001503 joint Anatomy 0.000 claims description 8
- 235000000396 iron Nutrition 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000011218 segmentation Effects 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims description 4
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 3
- 238000011900 installation process Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000012790 confirmation Methods 0.000 claims 1
- 238000011065 in-situ storage Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 6
- 238000000465 moulding Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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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
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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
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
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- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to the technical field of construction of large-span steel structure pipe trusses, in particular to a large-span steel structure cross annular pipe truss assembly method, which comprises the steps of field partitioning, horizontal assembly jig frame assembly, single-piece truss assembly, three-piece simultaneous trusses assembly, joint of connecting supports and the like according to the construction sequence of A, H areas, B, G areas, C, F areas and D, E areas until the whole structure assembly is completed; according to the invention, the truss single-piece assembly is firstly carried out in a ground assembly and then the crane hoisting construction mode is adopted, then all unit trusses are assembled in a combined mode through the vertical assembly jig frame to form three combined trusses, finally the assembled trusses and nodes at the support are assembled through hoisting, and the two sides of the trusses are expanded and assembled until the structure is installed, so that the rapid installation of the large-span steel structure annular pipe truss can be realized, the construction speed is greatly improved, and the construction method can be suitable for the construction of a complex large-span annular open-air gymnasium.
Description
Technical Field
The invention relates to the technical field of construction of large-span steel structure pipe trusses, in particular to a method for assembling a large-span steel structure crossed annular pipe truss.
Background
The large-span steel structure roof is widely applied, and common large gymnasiums, railway stations, concert halls and the like have the characteristics of large span and high height. The construction of a large-span annular pipe truss gym at the present stage is faced with various problems of large truss span, large volume, high weight, large manufacturing amount, difficult high-altitude operation and the like in the construction process.
In order to reduce high-altitude operation and improve construction speed, the prior art adopts a mode of assembling the pipe truss on the ground, and a reasonable assembling mode can effectively accelerate assembling speed and assembling accuracy. Chinese patent CN 112627355A proposes a method for assembling petal-shaped large-span roof truss, which adopts ground assembly, then uses crane to hoist and mount along straight line, so as to effectively increase the installation speed, but the invention has single structural form, simple ground assembly truss, single hoisting assembly operation, and is not very suitable for complex large-span annular open-air gymnasiums.
Based on the current situation, the invention provides a method for assembling a large-span steel structure crossed annular pipe truss.
Disclosure of Invention
The invention aims to provide a large-span steel structure cross annular pipe truss assembly method, which is used for manufacturing a ground truss assembly jig frame, realizing accurate assembly of a single truss and combined assembly of a plurality of trusses, and then constructing in a hoisting manner, so that the assembly speed is effectively improved, the overhead operation is reduced, and the large-span steel structure annular pipe truss assembly method is provided, the construction speed is improved, and the safety risk is reduced.
In order to achieve the above purpose, the invention adopts the following technical scheme:
A method for assembling a large-span steel structure crossed annular pipe truss comprises the following steps:
1) In order to realize the rapid installation of the large-span steel structure annular pipe truss, a mode of splicing on the ground and then hoisting by a crane is adopted; firstly, 4 construction assembly component yards are respectively arranged on the inner side and the outer side of a site, 8 construction assembly component yards are divided into A-H areas; according to the regional nearby stacking of the components, as the field splicing amount is large, after the steel structure processing factory is processed, each component of the truss is orderly sent to the field according to the field splicing sequence, so that the phenomenon of component confusion is avoided; firstly, splicing the truss in the area A;
2) The method comprises the steps of carrying out single-piece truss assembly on the ground by adopting a horizontal assembly jig, erecting the horizontal assembly jig in a construction site, carrying out truss ground sample testing on the ground by adopting a total station, accurately lofting, and elastically arranging ink line marks to determine the position of the jig;
3) After the horizontal assembly jig frame is erected, checking the positions, radians, angles and the like of the jig molds according to a construction drawing, and carrying out assembly work of the single truss after retesting; a 25t automobile crane is adopted to carry out single-piece truss assembly on a horizontal assembly jig frame, and size correction and acceptance check are required before assembly, fixation and welding;
4) After the single-piece truss is assembled, two trusses are assembled in a combined mode, firstly, the two trusses are assembled in a combined mode, and the single-piece truss is put down and put on the frame by adopting two 25t automobile cranes, so that the assembly precision of the single-piece truss is ensured. Detecting straightness of the trusses by taking more than three point positions on each single truss, controlling segmentation precision of the middle-spliced trusses by taking point positions of end parts of chords of the trusses at four sides as key nodes, and hoisting web members by adopting a 25t automobile crane after the two trusses are combined for connection; the combination and assembly of the three simultaneous trusses are further completed;
5) Installing nodes at the support, installing temporary supports, wherein the temporary supports are mainly arranged at the hoisting butt joint parts of the upper-air trusses in the gymnasium, hoisting the assembled three simultaneous trusses by adopting 350t crawler cranes in the field, assembling the three simultaneous trusses with the nodes at the support, and expanding and installing the three simultaneous trusses along the ring shape towards two sides;
6) And repeating the above work according to the construction sequence of A, H area, B, G area, C, F area and D, E area until the whole structure is assembled.
Further, the horizontal assembly jig frame is composed of a row of H-shaped steel which is placed in parallel, the height of the bottom of the horizontal assembly jig frame is adjusted by adopting T-shaped steel, a row of 18a I-shaped steel is arranged in the direction vertical to the H-shaped steel, the elevation of the top surface of the horizontal assembly jig frame is level with the H-shaped steel, the horizontal assembly jig frame is accurately positioned by adopting a total station, and the flatness of the plane of the jig frame is rechecked.
Furthermore, 25t automobile cranes are used for horizontal splicing feeding, truss chords are hoisted into position according to ground samples, positions of welding joints among the chords are free, chord positioning is carried out by using a total station, a straight web member and an inclined web member are hoisted into position, and ball joint positioning is carried out by measuring relative coordinates of two ends of chord member segments and rechecking a line vertical sample; and then preparing to weld, after assembling, spot welding and positioning the separated surfaces, checking the geometric dimensions of the truss, confirming that the truss can be welded, and strictly performing welding according to the welding process requirements.
Further, the vertical combined assembly jig frame consists of a jig frame upright rod, a jig frame cross rod, a bottom diagonal bracing, a supporting cross rod and a fixing member; the device is divided into a plurality of continuous moulding bed bars, the moulding bed upright bars are vertically welded on the moulding bed cross bars, the bottom diagonal braces are connected with the moulding bed upright bars and the moulding bed cross bars, and the bottoms of the moulding bed upright bars of the adjacent moulding bed cross bars are connected by the bottom cross bars; before assembling, firstly, a supporting cross rod and a fixing member are positioned on the vertical rod according to the position of the single truss and used for fixing the truss, then three trusses are respectively put on the jig frame to be positioned and fixed, and then assembling is carried out.
Further, when the single-piece trusses are assembled and combined into two trusses, the two 25t automobile cranes are adopted to lower and put the single-piece trusses on the shelf respectively, the assembled size is corrected, more than three point positions are taken on each single-piece truss to detect the straightness of the trusses, the point positions of the end parts of chords of four sides of the trusses are used as key nodes to control the segmentation precision of the middle-piece trusses, welding assembly work can be carried out after acceptance errors are avoided, and further three-piece simultaneous trusses are assembled.
Furthermore, the support is provided with cast steel nodes, the temporary support is provided with a 1m multiplied by 1m section, and the support is formed by splicing angle irons by adopting high-strength bolts, so that the support has the advantages of standardization, reusability and the like, is easy to transport, and has controllable height; the temporary supports are arranged at reasonable positions and used for supporting the structure in the construction process, and the stress of the supporting points is monitored by the force sensors in the structure installation process.
Further, according to construction sequence A, H area-B, G area-C, F area-D, E area, hoisting work of the truss is performed, firstly, joints and rod pieces at the support are installed and temporarily supported, then three simultaneous trusses and the support joints are hoisted by adopting a 350t crawler crane in a field to assemble, further hoisting single trusses are expanded and hoisted to two sides along the ring shape, and the truss rod pieces are complemented by using an automobile crane until the assembly of each area is completed.
Further, various correction measures are adopted to control the assembly precision; after the truss is assembled on the jig frame, all constraints on the truss are released, so that the truss is in a free state, and the sizes of the truss are measured in the free state to perform sectional assembly rechecking; in the hoisting and assembling process, displacement monitoring measures and stress monitoring measures are adopted.
By adopting the technical scheme, compared with the prior art, the invention has the beneficial effects that:
1) According to the invention, the truss single-piece assembly is firstly carried out in a ground assembly and then the crane hoisting construction mode is adopted, then all unit trusses are assembled in a combined mode through the vertical assembly jig frame to form three combined trusses, finally the assembled trusses and nodes at the support are assembled through hoisting, and the two sides of the assembled trusses are expanded and assembled until the structure is installed, so that the rapid installation of the large-span steel structure annular pipe truss can be realized, and the construction speed is greatly improved.
2) The ground truss assembly jig frame is manufactured, accurate assembly of single trusses and combined assembly of multiple trusses are achieved, then construction is carried out in a hoisting mode, the assembly speed is effectively improved, the construction order is guaranteed, high-altitude operation is reduced, and the safety risk of construction is reduced.
3) The invention carries out site partitioning according to the construction shape of the gymnasium, adopts a horizontal assembly jig frame to carry out single truss assembly on the ground, supports the assembly jig frame to assemble three simultaneous trusses, installs temporary supports to connect the joints of the three simultaneous trusses and the support, and finally, according to the construction sequence of A, H area, B, G area, C, F area and D, E area, the whole structure assembly is completed, and the invention can adapt to the construction of the complex large-span annular open-air gymnasium.
4) The temporary support provided by the invention adopts a 1m multiplied by 1m section, is formed by splicing angle irons by adopting high-strength bolts, has the advantages of standardization, reusability and the like, is easy to transport, and is highly controllable.
Drawings
FIG. 1 is a schematic diagram showing the overall assembly of the present invention;
FIG. 2 is a plan view of a horizontal splice jig frame used in the present invention;
FIG. 3 is an elevation view of a horizontal splice jig frame used in the present invention;
FIG. 4 is a schematic view of a monolithic truss assembly in accordance with the present invention;
FIG. 5 is a schematic view of a vertical assembled jig used in the present invention;
FIG. 6 is a plan view of the single truss upper frame of the present invention assembled in parallel;
FIG. 7 is a side view of the present invention showing the erection of the upper truss sheet;
FIG. 8 is a side elevation view of the single truss upper frame of the present invention in a combined assembly;
FIG. 9 is a schematic view of a three-piece simultaneous truss of the present invention;
FIG. 10 is a schematic view of a node at a support in accordance with the present invention;
FIG. 11 is a temporary support elevation of the present invention;
FIG. 12 is a plan view of a temporary support of the present invention;
FIG. 13 is a temporary support point (solid dots in the figure) layout of the present invention;
FIG. 14 is a schematic view of a single-piece truss lifting process according to the present invention;
The steel frame comprises the following components of a reference numeral, a 1-single truss, a 100-horizontal assembly jig frame, 101-H-shaped steel, 102-T-shaped steel, 103-18a I-shaped steel, a 200-vertical assembly jig frame, 201-jig frame vertical rods, 202-jig frame cross rods, 203-bottom cross rods, 204-bottom diagonal braces, 205-support cross rods, 206-fixing members, 3-three simultaneous trusses, 4-support-position nodes, 5-temporary supports and 501-angle irons.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. Other embodiments, or equivalents, which are apparent to those skilled in the art based on the examples provided herein, are intended to be within the scope of the invention.
As shown in fig. 1-14, a method for assembling a large-span steel structure crossed annular pipe truss comprises the following steps:
1) In order to realize the rapid installation of the large-span steel structure annular pipe truss, a mode of splicing on the ground and then hoisting by a crane is adopted; firstly, 4 construction assembly component yards are respectively arranged on the inner side and the outer side of a site, 8 construction assembly component yards are divided into A-H areas; according to the regional nearby stacking of the components, as the field splicing amount is large, after the steel structure processing factory is processed, each component of the truss is orderly sent to the field according to the field splicing sequence, so that the phenomenon of component confusion is avoided; firstly, splicing the truss in the area A;
2) Assembling a single truss 1 on the ground by adopting a horizontal assembling jig 100, erecting the horizontal assembling jig in a construction site, carrying out truss ground sample testing on the ground by adopting a total station, accurately lofting, and elastically arranging ink line marks to determine the position of the jig;
3) After the horizontal assembly jig frame is erected, checking the positions, radians, angles and the like of the jig molds according to a construction drawing, and carrying out assembly work of the single-piece truss 1 after retesting; a 25t automobile crane is adopted to assemble the single truss 1 on the horizontal assembly jig frame 100, and the size correction and acceptance check are required before the assembly, the fixation and the welding;
4) After the single truss 1 is assembled, two trusses are assembled in a combined mode, firstly, the combined assembly jig frame 200 is erected, the single truss is subjected to lower frame and upper frame by adopting two 25t automobile cranes, and the assembly precision of the single truss is ensured; taking more than three point positions on each single truss to detect the straightness of the truss, taking the point positions of the end parts of chords at four sides of the truss as key nodes to control the segmentation precision of the middle-spliced truss, hoisting web members by adopting a 25t automobile crane after the two trusses are combined, and connecting to further complete the combined assembly of three combined trusses 3;
5) Installing the node 4 at the support, installing a temporary support 5, wherein the temporary support 5 is mainly arranged at a butt joint part of a hoisting truss in the upper air in a gymnasium, hoisting the assembled three simultaneous trusses 3 by adopting a 350t crawler crane in a field, assembling with the node 4 at the support, and expanding and installing along the ring shape to two sides;
6) And repeating the above work according to the construction sequence of A, H area, B, G area, C, F area and D, E area until the whole structure is assembled.
The horizontal assembly jig 100 is composed of a row of H-shaped steel 101 which is placed in parallel, the height of the bottom of the horizontal assembly jig is adjusted by adopting T-shaped steel 102, a row of 18a I-shaped steel 103 is arranged in the direction vertical to the H-shaped steel 101, the elevation of the top surface of the horizontal assembly jig 100 is flush with the H-shaped steel 101, the horizontal assembly jig 100 is accurately positioned by adopting a total station, and the flatness of the plane of the jig is rechecked.
The method comprises the steps of carrying out horizontal splicing feeding by adopting a 25t automobile crane, lifting truss chords into position according to a ground sample, leaving positions of welding nodes among the chords, carrying out chord positioning by adopting a total station, lifting a straight web member and an inclined web member into position, and carrying out ball node positioning by measuring relative coordinates of two ends of chord member segments and rechecking a line vertical sample; and then preparing to weld, after assembling, spot welding and positioning the separated surfaces, checking the geometric dimensions of the truss, confirming that the truss can be welded, and strictly performing welding according to the welding process requirements.
The vertical combined assembly jig frame consists of a jig frame upright rod 201, a jig frame cross rod 202, a bottom cross rod 203, a bottom diagonal brace 204, a support cross rod 205 and a fixing member 206; the two-frame vertical rods are divided into the same and continuous several truss frames, the jig frame vertical rods 201 are vertically welded on the bottom transverse rods 202, the bottom diagonal braces 204 are connected with the jig frame vertical rods 201 and the jig frame transverse rods 202, and the bottoms of the jig frame vertical rods 201 of the adjacent jig frame transverse rods 202 are connected by the bottom transverse rods 203; before assembly, the supporting cross rod 205 and the fixing member 206 are positioned on the jig frame upright rod 201 according to the positions of the single trusses, the trusses are fixed, and then the three trusses are respectively put on the jig frame to be positioned and fixed, and then assembly is carried out.
When the single-piece trusses 1 are assembled and combined into two trusses, the two 25t automobile cranes are adopted to lower and put the single-piece trusses on the shelf, the assembled size is corrected after the two trusses are put on the shelf respectively, more than three point positions are taken on each single-piece truss to detect the straightness of the trusses, the point positions of the end parts of chords on four sides of the trusses are used as key nodes to control the segmentation precision of the middle-piece trusses, welding assembly work can be carried out after acceptance errors are avoided, and further assembly of the three-piece simultaneous trusses 3 is carried out.
The support node 4 adopts cast steel nodes, the temporary support 5 adopts a 1m multiplied by 1m section, the temporary support is formed by splicing angle irons 501 by adopting high-strength bolts, the support has the advantages of standardization, reusability and the like, is easy to transport, and is highly controllable, the temporary support 5 is arranged at reasonable positions for supporting a structure in the construction process, and a force sensor is adopted to monitor the stress of a supporting point in the structure installation process.
The truss hoisting work is carried out according to a construction sequence A, H area, a B, G area, a C, F area and a D, E area, firstly, a support node 4, a rod piece and a temporary support 5 are installed, then three simultaneous trusses 3 are hoisted by adopting a 350t crawler crane in a field and the support node 4 are assembled, further, a single truss is hoisted in an expanding mode along the annular direction to two sides, and the truss rod piece is complemented by an automobile crane until the assembly of each area is completed.
Wherein, various corrective measures are adopted to control the assembly precision; after the truss is assembled on the jig frame, all constraints on the truss are released, so that the truss is in a free state, and the sizes of the truss are measured in the free state to perform sectional assembly rechecking; in the hoisting and assembling process, displacement monitoring measures and stress monitoring measures are adopted.
From the above, the present invention has the following advantages: 1) Firstly, splicing single truss sheets, splicing unit trusses in a combined mode through a vertical splicing jig frame to form three combined trusses, splicing the spliced trusses and nodes at a support through hoisting, and expanding and splicing along two sides until the structure is installed, so that the rapid installation of the large-span steel structure annular pipe truss can be realized, and the construction speed is greatly improved; 2) Manufacturing a ground truss assembly jig frame, realizing accurate assembly of single-piece trusses and combined assembly of multiple trusses, and then constructing in a hoisting manner, so that the assembly speed is effectively improved, the construction order is ensured, the overhead operation is reduced, and the safety risk of construction is reduced; 3) The construction method comprises the steps of carrying out site partitioning according to the construction shape of a gymnasium, carrying out single-piece truss assembly on the ground by adopting a horizontal assembly jig, erecting a combined assembly jig to assemble three simultaneous trusses, installing temporary supports to connect the joints of the three simultaneous trusses and a support, and finally carrying out construction sequence from A, H area to B, G area to C, F area to D, E area until the whole structure is assembled, so that the construction method can be suitable for the construction of a complex large-span annular open-air gymnasium.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form 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 understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (5)
1. A method for assembling a large-span steel structure crossed annular pipe truss is characterized by comprising the following steps:
1) Site partitioning: 4 construction assembly component yards are respectively arranged on the inner side and the outer side of the site, 8 construction assembly component yards are divided into A-H areas, and the truss assembly of the A area is firstly carried out according to the nearby stacking components of the areas;
2) Assembling jig frame: assembling a single truss (1) on the ground by adopting a horizontal assembling jig (100), erecting the horizontal assembling jig in a construction site, carrying out truss ground sample test on the ground by adopting a total station, accurately lofting, and elastically arranging an ink line mark to determine the position of the jig;
3) Assembling a single truss (1): after the horizontal assembly jig frame is erected, checking the position, radian and angle conditions of the jig mould according to a construction drawing, and carrying out assembly work of the single truss (1) after retesting; a 25t automobile crane is adopted to assemble a single truss (1) on a horizontal assembly jig frame (100), and size correction and acceptance check are required before assembly, fixation and welding;
4) Assembling three-piece combined truss (3): after the single truss (1) is assembled, two trusses are assembled in a combined mode, firstly, a combined assembly jig frame (200) is erected, and the single truss (1) is subjected to frame unloading and frame loading by adopting two 25t automobile cranes, so that the assembly precision of the single truss (1) is ensured; taking more than three point positions on each single-piece truss (1), detecting the straightness of the truss, taking the point positions of the end parts of chords around the truss as key nodes, performing middle-spliced truss segmentation precision control, hoisting web members by adopting a 25t automobile crane after two trusses are combined, and connecting to complete the combined assembly of three combined trusses (3);
5) Joint (4) at the connecting support: the node (4) and the temporary support (5) at the support are installed, the temporary support (5) is arranged at the butt joint part of the overhead truss hoisting in the gymnasium, three spliced trusses (3) are hoisted by adopting 350t crawler cranes in the field, spliced with the node (4) at the support, and expanded and installed along the ring shape to two sides;
6) Constructing area by area: repeating the above work according to the construction sequence of A, H area, B, G area, C, F area and D, E area until the whole structure is assembled;
The horizontal assembly jig frame (100) consists of a row of H-shaped steel (101) which is arranged in parallel, the height of the bottom of the horizontal assembly jig frame is adjusted by adopting T-shaped steel (102), a row of 18a I-shaped steel (103) is arranged in the direction vertical to the H-shaped steel (101), the elevation of the top surface of the horizontal assembly jig frame is flush with the vertical H-shaped steel (101), the horizontal assembly jig frame (100) is accurately positioned by adopting a total station, and the flatness of the plane of the jig frame is rechecked;
The vertical combined assembly jig frame (200) consists of a jig frame upright post (201), a jig frame cross rod (202), a bottom cross rod (203), a bottom diagonal brace (204), a support cross rod (205) and a fixing member (206); the bottom ends of the jig frame upright rods (201) are vertically welded on the jig frame cross rods (202), the bottom diagonal braces (204) are connected with the jig frame upright rods (201) and the jig frame cross rods (202), and the jig frame upright rods (201) of adjacent jig frame cross rods (202) are connected by the bottom cross rods (203); before assembling, firstly positioning a support cross rod (205) and a fixing member (206) on a jig frame upright (201) according to the position of a single truss, fixing the trusses, then respectively putting the three trusses on the jig frame, positioning and fixing the three trusses, and then assembling;
The support is characterized in that the support is provided with a node (4) made of cast steel, the temporary support (5) is provided with a section of 1m multiplied by 1m, the temporary support is formed by splicing angle irons (501) by high-strength bolts, and a force sensor is used for monitoring stress of a supporting point in the structure installation process.
2. The method for assembling the large-span steel structure crossed annular pipe truss, according to claim 1, is characterized in that 25t automobile cranes are adopted for horizontal splicing feeding, truss chords are lifted in place according to ground samples, welding joint positions among the chords are vacant, chord positioning is carried out by using a total station, a straight web member and an inclined web member are lifted in place, and ball joint positioning is carried out by checking relative coordinates of two ends of a tested chord member section and a line vertical sample; and preparing welding work, assembling, spot welding and positioning by adopting a separating surface, checking the geometric dimension of the truss, and starting welding after confirmation.
3. The method for assembling the large-span steel structure crossed annular pipe trusses, which is disclosed in claim 1, is characterized in that when the single trusses (1) are assembled and combined into two trusses, two 25t automobile cranes are adopted to lower and put on the single trusses, after the two trusses are put on the frames respectively, the assembled size is corrected, more than three point positions are taken on each single truss to detect the straightness of the trusses, the point positions of the end parts of chords of the trusses are used as key nodes to control the sectional precision of the middle-spliced trusses, and after acceptance errors are detected, the welding assembly of three simultaneous trusses (3) is carried out.
4. The method for assembling the long-span steel structure crossed annular pipe truss according to claim 1 is characterized in that truss hoisting is carried out according to a construction sequence A, H region, B, G region, C, F region and D, E region, a support node (4), each rod piece and a temporary support (5) are firstly installed, then three simultaneous trusses (3) and support nodes (4) are hoisted by adopting an in-situ 350t crawler crane to assemble, further hoisting single trusses are expanded and hoisted to two sides along the ring shape, and truss rods are complemented by using an automobile crane until the assembling of each region is completed.
5. The method for assembling the long-span steel structure crossed annular pipe truss according to claim 1, wherein after the truss is assembled on the jig frame, all constraints on the truss are released, the truss is in a free state, and the sizes of the truss are measured in the free state, so that sectional assembly and rechecking are performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210828950.8A CN115262983B (en) | 2022-07-15 | 2022-07-15 | Large-span steel structure crossed annular pipe truss assembling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210828950.8A CN115262983B (en) | 2022-07-15 | 2022-07-15 | Large-span steel structure crossed annular pipe truss assembling method |
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| CN116971481B (en) * | 2023-06-26 | 2026-03-10 | 中铁钢结构有限公司 | Large-span venue steel structure and construction process thereof |
| CN116856544B (en) * | 2023-07-24 | 2025-09-05 | 浙江中南绿建科技集团有限公司 | A ring-shaped inclined truss structure and its installation method |
| CN117468711A (en) * | 2023-10-24 | 2024-01-30 | 中国建筑第四工程局有限公司 | A method of assembling steel structure trusses |
| CN117822903A (en) * | 2023-12-22 | 2024-04-05 | 中建科工集团有限公司 | Pipe truss construction method |
| CN118745790B (en) * | 2024-05-24 | 2025-11-18 | 中国五冶集团有限公司 | A method for constructing a large-span spoke-type cable-supported roof canopy without scaffolding. |
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| CN111501997A (en) * | 2020-04-23 | 2020-08-07 | 贵州建工集团第四建筑工程有限责任公司 | Steel truss structure construction method applied to stadium |
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| CN112012340B (en) * | 2020-09-25 | 2021-07-30 | 中建一局集团第三建筑有限公司 | Suspension connection node for large-span cantilever steel truss and construction method thereof |
| CN112252472A (en) * | 2020-10-26 | 2021-01-22 | 上海宝冶集团有限公司 | Ground splicing method for irregular polygonal steel structure truss |
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| CN109653515A (en) * | 2019-01-21 | 2019-04-19 | 中如建工集团有限公司 | Across the steel worm-gearing truss hanging method of 120m |
| CN111501997A (en) * | 2020-04-23 | 2020-08-07 | 贵州建工集团第四建筑工程有限责任公司 | Steel truss structure construction method applied to stadium |
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