CN111779135A - Arch coupon steel structure and installation method thereof - Google Patents
Arch coupon steel structure and installation method thereof Download PDFInfo
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- CN111779135A CN111779135A CN202010586268.3A CN202010586268A CN111779135A CN 111779135 A CN111779135 A CN 111779135A CN 202010586268 A CN202010586268 A CN 202010586268A CN 111779135 A CN111779135 A CN 111779135A
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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
- E04B1/32—Arched structures; Vaulted structures; Folded structures
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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
- E04B1/32—Arched structures; Vaulted structures; Folded structures
- E04B2001/3229—Arched structures; Vaulted structures; Folded structures constructed using a boom
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Abstract
A coupon steel structure and an installation method thereof, wherein the coupon steel structure comprises: the side upright columns are positioned at two ends of the whole arch coupon steel structure; the connecting chord is arranged between the two side upright posts and comprises a lower chord and an upper chord, and two ends of the lower chord are respectively and rigidly connected with the side upright posts; two ends of the upper chord are fixedly connected with the upper ends of the side upright posts and/or the upper ends of the middle supports; the middle support is arranged between the lower chord and the upper chord and comprises a vertical web member and an inclined support; the installation method comprises the following steps: the whole is decomposed into a plurality of individual components; erecting an assembling jig frame below the lower chord and assembling the lower chord into two arc-shaped subsections; a portal mounting lifting anchorage device is arranged at the position, close to the midspan, of the lower chord member; sequentially rotating and lifting the arc-shaped sections, installing the middle embedding section of the lower chord, and adjusting and welding; and the vertical web members and the inclined struts are sequentially arranged from the end part to the midspan until the installation is finished. The invention has the beneficial effects that: the problem that a large crane cannot be used at a site and operated is solved.
Description
Technical Field
The invention belongs to the technical field of steel structures, and particularly relates to an arch coupon steel structure and an installation method thereof.
Background
For a large-span structure, the arch coupon structure is simple and novel, has good load bearing characteristics, and can meet the design requirements of building aesthetics. However, due to the limitation of the bearing capacity of the basement roof, a large crane cannot perform construction work on the basement roof. The construction machinery equipped on site usually has limited overweight performance, and can not meet the installation of large-tonnage steel structures. Therefore, on the premise of meeting the structural bearing and design requirements, the installation method which has strong operability, solves the problem that a large crane cannot stand and operate on the top plate of the basement, reduces the construction cost, is economical and reasonable and can meet the requirements of construction and installation of the arch coupon steel structure is required.
Disclosure of Invention
In order to overcome the problems, the invention aims to provide an arch coupon steel structure and an installation method thereof, which meet the installation precision and design requirements.
The invention discloses an arch coupon steel structure, which is characterized by comprising the following components:
the side upright columns are positioned at two ends of the whole arch coupon steel structure and are of box body column structures arranged in the vertical direction;
the connecting chord is arranged between the two side upright posts and comprises a lower chord and an upper chord, the lower chord is an arc box-shaped rod body which is arched upwards, two ends of the lower chord are respectively and rigidly connected with the lower parts of the side upright posts on the same side, and the upper edge of the lower chord is axially provided with a plurality of bracket structures which are used for being fixedly connected with the middle support; the upper chord is positioned right above the middle support, the upper chord, the lower chord and the middle support are kept on the same vertical plane, and two ends of the upper chord are fixedly connected with the upper end of the side upright and/or the upper end of the middle support;
the middle support is arranged between the lower chord and the upper chord and comprises a vertical web member and an inclined support, the lower end of the vertical web member is fixedly connected with the bracket structure of the lower chord, the upper end fixed point is fixedly connected with the upper chord, and the vertical web member is kept parallel to the side upright; the inclined supports are arranged between the two vertical web members or between the edge stand column and the vertical web members, the lower ends of the inclined supports are fixedly connected with the bracket structures of the lower chord members, and the upper ends of the inclined supports are fixedly connected with the upper end fixed points of the edge stand column or the vertical web members, so that the inclined supports are supported between the upper chord members and the lower chord members.
The side column comprises a side column lower section and a side column upper section, wherein the side column lower section and the side column upper section are coaxially and fixedly connected together to form a box column structure.
The two ends of the lower chord are respectively and rigidly connected with the lower sections of the side stand columns at the same side, and each lower chord assembly section and each lower chord embedding section are provided with bracket structures; the lower chord assembling segments are divided into two groups, the head and the tail of the lower chord assembling segments in the same group are sequentially and fixedly connected into an arc-shaped segment, and the two arc-shaped segments are fixedly connected together through the lower chord embedding segments to form an arc-shaped box-type rod body which is bent upwards.
The upper chord members are horizontally arranged above the vertical web members and comprise two end upper chord member sections and a plurality of middle upper chord member sections, the end upper chord member sections are arranged between the side upright posts and the adjacent vertical web members, and the two end parts of the end upper chord member sections are fixedly connected with the upper ends of the upper sections of the side upright posts and the upper ends of the adjacent vertical web members respectively; the middle upper chord sections are arranged between two adjacent vertical web members, the two end parts of the middle upper chord sections are fixedly connected with the upper end fixed points of the vertical web members respectively, and the end upper chord sections and the middle upper chord sections are kept on the same horizontal shaft.
The side stand is adjacent set up two bearing diagonal between the vertical web member, and sets up a bearing diagonal between the two adjacent vertical web members, and all incline towards the side stand direction with the bearing diagonal that the bracket structure on same arc segmentation links to each other.
The vertical web members are H-shaped steel, and the lower ends of the vertical web members are fixedly connected with the lower sections of the side stand columns.
The inclined strut is H-shaped steel, the upper end of the inclined strut is fixedly connected with the vertical web member or the upper section of the side upright column, and the lower end of the inclined strut is fixedly connected with the bracket structure of the vertical web member.
The upper chord section at the end part of the upper chord and the middle upper chord section are both H-shaped steel.
The installation method of the arch coupon steel structure is characterized by comprising the following steps of:
(1) according to the project structure form and the hoisting performance of hoisting machinery configured on site, the arch coupon structure is segmented after being subjected to construction stage simulation analysis, the weight of the segment is ensured to meet the hoisting performance of the hoisting machinery, and 20% of hoisting allowance is contained;
(2) extracting three-dimensional coordinate values of each segmentation point of a lower chord and an end butt joint interface in a CAD three-dimensional model by adopting a computer simulation technology, taking the three-dimensional coordinate values as a theoretical basis for installing control points on the lower chord segmentation of the arch coupon steel structure, finding out three-dimensional coordinates of each control node and the end butt joint interface in a lower chord segmentation assembling state according to the CAD three-dimensional model, and taking the three-dimensional coordinates as a theoretical basis for installing and accurately positioning a lower chord of the arch coupon structure in space;
(3) processing upright rods and web members meeting the support requirements into a plurality of lattice combined first supports, combining the upright rods and the web members into a group two by two to form 1 portal frame, and using the portal frame as a portal frame structure for rotating and lifting the lower chord member; h steel platforms are arranged at the upper end and the lower end of the portal frame;
(4) processing the upright rods and the web members which meet the support requirements into a lattice combined second support which is used as a second support for installing and assembling the lower chord member in sections; h steel platforms are arranged at the upper end and the lower end of the second support;
(5) mounting supports for assembling the lower chord sections, arranging an assembling jig frame at the upper part, sequentially hanging the lower chord sections on the jig frame for assembling, and controlling the spatial position of the lower chord mounting sections according to the theoretical coordinates of the control points selected in the step (2) to ensure the spatial positioning and mounting precision; a rotary hinge joint is arranged at the joint of the lower end of the lower chord and the bracket of the side upright post;
(6) dividing the lower chord assembling sections into two groups, welding the lower chord assembling sections into two arc sections in sequence, and inspecting to be qualified;
(7) installing a portal structure for rotary lifting, installing an anchorage device, pulling a guy rope, and checking to be qualified;
(8) starting to rotate and lift the lower chord member, firstly lifting the arc-shaped segment on the right side, and after the arc-shaped segment on the right side is lifted in place, retesting and fixing; then lifting the arc-shaped segment at the left side to a proper position and fixing;
(9) a lower chord embedding section is arranged between the two arc sections;
(10) welding a welding seam between the middle embedding section and the two installation sections, then welding a welding seam between the lower chord member on one side and the bracket of the side upright post, and finally welding a welding seam between the lower chord member on the other side and the bracket of the side upright post; and the welding seams at the two sides can not be welded simultaneously;
(11) sequentially installing components such as vertical web members, inclined struts and the like from two sides to the middle until the installation is finished;
(12) and after welding and inspection are qualified, dismantling temporary tools such as an assembling support, a portal frame, a rotary hinge joint and the like.
The invention has the beneficial effects that: the structure is simple and novel, and the building is attractive in appearance and meets the building aesthetic requirements except for good vertical bearing characteristics. The installation method has strong operability, and solves the problem that a large crane cannot be standing and operated on site; the use of a large crane is avoided, and the construction cost is reduced; high altitude installation effectiveness is high, has improved the installation positioning accuracy of arch coupon lower chord member segmentation simultaneously, reduces the error, has improved the installation quality of building steel structure, has reduced the installation risk of steel construction.
Drawings
FIG. 1 is a schematic axial view of the steel structure of the arch coupon of the present invention;
fig. 2 is a schematic diagram of the division of the side upright post and the lower chord of the arch coupon steel structure.
Fig. 3a is an axial view of the support for assembling the arch coupon steel structure of the present invention.
Fig. 3b is a schematic axial view of the portal frame for assembling the arch coupon steel structure.
Fig. 4 is a schematic view of the rotary lifting anchor for the lower chord of the arch coupon steel structure.
Fig. 5a is a schematic view of the rotation lifting hinge joint axis of the lower chord of the arch coupon steel structure.
Fig. 5b is a front view of the rotary lifting hinge joint of the lower chord of the arch coupon steel structure.
Fig. 6 is a schematic view of the installation and the segmental assembly of the lower chord of the arch coupon steel structure.
Fig. 7 is a schematic view of the installation and segmental assembling axis measurement of the lower chord of the arch coupon steel structure.
Fig. 8 is a schematic view of the installation and segmental rotary lifting of the lower chord of the arch coupon steel structure.
Fig. 9 is a schematic view of the installation of the segment embedding segment of the lower chord of the arch coupon steel structure.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
With reference to the accompanying drawings:
embodiment 1 a archway steel structure according to the present invention includes:
the side upright columns 2 are positioned at two ends of the whole arch coupon steel structure and are of box body column structures arranged in the vertical direction;
the connecting chord is arranged between the two side upright posts and comprises a lower chord 1 and an upper chord 4, the lower chord is an arc box-shaped rod body which is arched upwards, two ends of the lower chord are respectively and rigidly connected with the lower parts of the side upright posts on the same side, and the upper edge of the lower chord is provided with a plurality of bracket structures along the axial direction and is used for being fixedly connected with the middle support; the upper chord is positioned right above the middle support, the upper chord, the lower chord and the middle support are kept on the same vertical plane, and two ends of the upper chord are fixedly connected with the upper end of the side upright and/or the upper end of the middle support;
the middle support is arranged between the lower chord and the upper chord and comprises a vertical web member 3 and an inclined support 5, the lower end of the vertical web member is fixedly connected with the bracket structure of the lower chord, the upper end fixed point is fixedly connected with the upper chord, and the vertical web member is kept parallel to the side upright; the inclined supports are arranged between the two vertical web members or between the edge stand column and the vertical web members, the lower ends of the inclined supports are fixedly connected with the bracket structures of the lower chord members, and the upper ends of the inclined supports are fixedly connected with the upper end fixed points of the edge stand column or the vertical web members, so that the inclined supports are supported between the upper chord members and the lower chord members.
The side column 2 comprises a side column lower section 21 and a side column upper section 22, wherein the side column lower section and the side column upper section are coaxially and fixedly connected together to form a box body column structure.
The two ends of the lower chord 1 are respectively and rigidly connected with the lower sections 21 of the side columns at the same side, and comprise a plurality of lower chord assembling sections 11 and lower chord embedding sections 16, and the lower chord assembling sections 11 and the lower chord embedding sections 12 are both provided with bracket structures 111; the lower chord assembling sections 11 are divided into two groups, the head and the tail of the lower chord assembling sections in the same group are sequentially and fixedly connected into an arc section, and the two arc sections are fixedly connected together through the lower chord embedding section to form an arc box-type rod body which is bent upwards.
The upper chord 4 is horizontally arranged above the vertical web members and comprises two end upper chord sections 41 and a plurality of middle upper chord sections 42, the end upper chord sections 41 are arranged between the side upright 2 and the adjacent vertical web members 3, and the two end parts of the end upper chord sections are fixedly connected with the upper ends of the side upright upper sections 22 and the upper ends of the adjacent vertical web members at fixed points respectively; the middle upper chord sections are arranged between two adjacent vertical web members, the two end parts of the middle upper chord sections are fixedly connected with the upper end fixed points of the vertical web members respectively, and the end upper chord sections and the middle upper chord sections are kept on the same horizontal shaft.
The side column 2 is adjacent two inclined struts 5 are arranged between the vertical web members 3, one inclined strut is arranged between every two adjacent vertical web members, and the inclined struts connected with the bracket structures on the same arc-shaped segment are inclined towards the side column.
The vertical web members 3 are H-shaped steel, and the lower ends of the vertical web members are fixedly connected with the lower sections of the side stand columns.
The inclined strut 5 is H-shaped steel, the upper end of the inclined strut is fixedly connected with the vertical web member or the upper section of the side upright column, and the lower end of the inclined strut is fixedly connected with the bracket structure of the vertical web member.
The end upper chord section 41 and the middle upper chord section 42 of the upper chord 4 are both H-shaped steel.
The side column 2 is divided into 2 mounting sections 21 and 22 according to the mounting requirements, and the lower section 21 is mounted in place as a preceding mounting component.
The lower chord 1 is a spliced box structure which is bent by a fold, and a bracket structure 11 connected with the upper vertical web member 3 and the inclined support 5 is arranged above the box. According to the requirement of site construction, the lower chord 1 is divided into ten lower chord assembling sections 11 and one embedding section 12.
The vertical web members 3 are H-shaped steel, and the lower ends thereof are connected with the corbel structures 111 of the lower chord 1.
The inclined strut 5 is made of H-shaped steel, and the upper end and the lower end of the inclined strut are respectively connected with the side upright post 2 and the bracket structure 111 of the lower chord 1.
The upper chord 4 is H-shaped steel, and two ends of the upper chord are respectively connected with the vertical web members 3 or the side upright posts 2.
The anchorage device 7 comprises an anchorage device cross beam 71, an anchorage device penetrating jack seat 72, a penetrating jack 73, a steel strand 74 and a lifting anchor node 75, wherein the anchorage device cross beam 71 is fixedly arranged at the top end of the portal frame 6, the anchorage device penetrating jack seat 72 is hinged on the anchorage device cross beam 71, the penetrating jack 73 is arranged on the anchorage device penetrating jack seat 72, the penetrating jack 73 is provided with the steel strand 74, one end of the steel strand 74 is connected with the movable part of the penetrating jack 73, the other end of the steel strand is provided with the lifting anchor node 75, the lifting anchor node 75 is arranged on the lifting node plate 8, and the lifting node plate 8 is fixedly arranged at the position, close to the midspan position, of the lower chord member 1, so that the interconnection between the portal frame 6 and the lower chord member 1 is realized.
The rotary hinge joint 10 comprises a rotary hinge joint lower side ear plate 101, a rotary hinge joint upper side ear plate 102, a rotary hinge joint ear plate stiffening rib 103 and a pin shaft 104, wherein one end of the rotary hinge joint lower side ear plate 101 is connected with the connection part of the lower end of the lower chord and the bracket structure of the side upright post 21; the upper side ear plate 102 of the rotary hinge node is arranged at the bottom of the lower chord, and the lower side ear plate 101 of the rotary hinge node and the upper side ear plate 102 of the rotary hinge node are connected through a pin 104; the rotary hinge joint lug stiffening rib 103 is provided between the rotary hinge joint lug stiffening rib 103 and the lower chord 1.
Embodiment 3a method of installing a spandrel steel structure according to embodiment 2, comprising the steps of:
(1) and (4) according to the project structure form and the hoisting performance of the hoisting machine configured on site, carrying out simulation analysis on the arch coupon structure and then segmenting. The segment weight is ensured to meet the requirement of hoisting performance of hoisting machinery, and 20 percent of hoisting allowance is contained;
(2) and extracting three-dimensional coordinates of each node and an end butt joint interface of the lower chord section 11 in the CAD three-dimensional model by adopting a computer simulation technology, and using the three-dimensional coordinates as a theoretical basis for installation control of the lower chord section 11 of the arch coupon structure. According to the CAD three-dimensional model, finding out three-dimensional coordinate values of all nodes and end butt joint interfaces of the spatial position when the lower chord section 11 is in an assembled state, and using the three-dimensional coordinate values as a theoretical basis for the assembly control of the lower chord installation section of the arch coupon structure; (FIG. 2)
(3) The steel pipe phi 180 multiplied by 8 is used as a vertical rod, the steel pipe phi 89 multiplied by 6 is used as a web member, and the steel pipe phi 180 multiplied by 6 is processed into 4 pieces in total of lattice combined first supports 61 with the center distance of 1.5m multiplied by 1.5m, and the materials are all Q235B. Wherein 2 pieces of supports are combined into 1 portal frame 6 which is used as a portal frame structure for rotating and lifting the lower chord; the upper end and the lower end of the portal are respectively provided with an upper portal H steel platform 62 and a lower portal conversion platform 63. (FIG. 3)
(4) Adopting a steel pipe phi 140 multiplied by 8 as a vertical rod and a steel pipe phi 70 multiplied by 6 as a web member, processing the vertical rod and the web member into 9 pieces of lattice combined second supports 9 with the center distance of 0.8m multiplied by 0.8m, wherein the materials of the second supports are Q235B and the second supports are used as supports 9 for installing and assembling the lower chord member in sections; the upper end and the lower end of the support are respectively provided with an assembling support upper H steel platform 91 and an assembling support lower H steel platform 93. (FIG. 3)
(5) Installing a second support 9 for assembling the lower chord sections, arranging an upper assembling jig frame 94, sequentially hanging the lower chord assembling sections 11 on the upper jig frame for assembling, and controlling the three-dimensional size of the spatial position of the lower chord installation sections and control points such as the centers of all nodes and end butt joint interfaces according to the three-dimensional coordinates in the step (2); and a rotary hinge joint 10 is arranged at the joint of the lower end of the lower chord and the bracket structure of the lower section 21 of the side upright. (FIG. 6)
(6) The lower chord is installed, sectionally welded into a whole and is qualified after inspection.
(7) Installing a portal structure 6 for rotary lifting, respectively arranging an anchorage 7 and a lifting gusset plate 8 at the top end of the portal 6 and the position close to the midspan of a lower chord, interconnecting the anchorage 7 and the lifting gusset plate 8 through a steel strand 75, pulling a cable rope 64, and checking to be qualified. (FIG. 6)
(8) Starting rotating and lifting, firstly lifting the right arc-shaped segment, and retesting and fixing after the right arc-shaped segment is lifted in place; the left arcuate segment is then lifted into position and secured. (FIG. 7)
(9) The lower chord middle insert 16 is installed. (FIG. 8)
(10) Firstly welding a welding seam between the middle embedding section 16 and the two installation subsections, then welding a welding seam between the lower chord 1 on one side and the bracket structure of the lower section 21 of the side upright post, and finally welding a welding seam between the lower chord 1 on the other side and the bracket structure of the upper section 21 of the side upright post; the welding seams at the two sides cannot be welded simultaneously;
(11) the vertical web members 3, the diagonal braces 5, the upper chords 4 and the like are sequentially installed from two sides to the middle until the installation is completed. (FIG. 9)
(12) And after welding and inspection are qualified, removing the temporary tools such as the second support 9, the portal frame 6, the rotary hinge point 10 and the like.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but includes equivalent technical means as would be recognized by those skilled in the art based on the inventive concept.
Claims (9)
1. A coupon steel structure, comprising:
the side upright columns are positioned at two ends of the whole arch coupon steel structure and are of box body column structures arranged in the vertical direction;
the connecting chord is arranged between the two side upright posts and comprises a lower chord and an upper chord, the lower chord is an arc box-shaped rod body which is arched upwards, two ends of the lower chord are respectively and rigidly connected with the lower parts of the side upright posts on the same side, and the upper edge of the lower chord is axially provided with a plurality of bracket structures which are used for being fixedly connected with the middle support; the upper chord is positioned right above the middle support, the upper chord, the lower chord and the middle support are kept on the same vertical plane, and two ends of the upper chord are fixedly connected with the upper end of the side upright and/or the upper end of the middle support;
the middle support is arranged between the lower chord and the upper chord and comprises a vertical web member and an inclined support, the lower end of the vertical web member is fixedly connected with the bracket structure of the lower chord, the upper end fixed point is fixedly connected with the upper chord, and the vertical web member is kept parallel to the side upright; the inclined supports are arranged between the two vertical web members or between the edge stand column and the vertical web members, the lower ends of the inclined supports are fixedly connected with the bracket structures of the lower chord members, and the upper ends of the inclined supports are fixedly connected with the upper end fixed points of the edge stand column or the vertical web members, so that the inclined supports are supported between the upper chord members and the lower chord members.
2. A coupon steel structure as defined in claim 1, wherein: the side column comprises a side column lower section and a side column upper section, wherein the side column lower section and the side column upper section are coaxially and fixedly connected together to form a box column structure.
3. A coupon steel structure as defined in claim 2, wherein: the two ends of the lower chord are respectively and rigidly connected with the lower sections of the side stand columns at the same side, and each lower chord assembly section and each lower chord embedding section are provided with bracket structures; the lower chord assembling segments are divided into two groups, the head and the tail of the lower chord assembling segments in the same group are sequentially and fixedly connected into an arc-shaped segment, and the two arc-shaped segments are fixedly connected together through the lower chord embedding segments to form an arc-shaped box-type rod body which is bent upwards.
4. A coupon steel structure as defined in claim 3 wherein: the upper chord members are horizontally arranged above the vertical web members and comprise two end upper chord member sections and a plurality of middle upper chord member sections, the end upper chord member sections are arranged between the side upright posts and the adjacent vertical web members, and the two end parts of the end upper chord member sections are fixedly connected with the upper ends of the upper sections of the side upright posts and the upper ends of the adjacent vertical web members respectively; the middle upper chord sections are arranged between two adjacent vertical web members, the two end parts of the middle upper chord sections are fixedly connected with the upper end fixed points of the vertical web members respectively, and the end upper chord sections and the middle upper chord sections are kept on the same horizontal shaft.
5. A coupon steel structure as defined in claim 4, wherein: the side stand is adjacent set up two bearing diagonal between the vertical web member, and sets up a bearing diagonal between the two adjacent vertical web members, and all incline towards the side stand direction with the bearing diagonal that the bracket structure on same arc segmentation links to each other.
6. A coupon steel structure as defined in claim 5, wherein: the vertical web members are H-shaped steel, and the lower ends of the vertical web members are fixedly connected with the lower sections of the side stand columns.
7. A coupon steel structure as defined in claim 6, wherein: the inclined strut is H-shaped steel, the upper end of the inclined strut is fixedly connected with the vertical web member or the upper section of the side upright column, and the lower end of the inclined strut is fixedly connected with the bracket structure of the vertical web member.
8. A coupon steel structure as defined in claim 4, wherein: the upper chord section at the end part of the upper chord and the middle upper chord section are both H-shaped steel.
9. The method for installing the arch coupon steel structure according to any one of claims 1 to 8, wherein the method comprises the following steps:
(1) according to the project structure form and the hoisting performance of hoisting machinery configured on site, the arch coupon structure is segmented after being subjected to construction stage simulation analysis, the weight of the segment is ensured to meet the hoisting performance of the hoisting machinery, and 20% of hoisting allowance is contained;
(2) extracting three-dimensional coordinate values of each segmentation point of a lower chord and an end butt joint interface in a CAD three-dimensional model by adopting a computer simulation technology, taking the three-dimensional coordinate values as a theoretical basis for installing control points on the lower chord segmentation of the arch coupon steel structure, finding out three-dimensional coordinates of each control node and the end butt joint interface in a lower chord segmentation assembling state according to the CAD three-dimensional model, and taking the three-dimensional coordinates as a theoretical basis for installing and accurately positioning a lower chord of the arch coupon structure in space;
(3) processing upright rods and web members meeting the support requirements into a plurality of lattice combined first supports, combining the upright rods and the web members into a group two by two to form 1 portal frame, and using the portal frame as a portal frame structure for rotating and lifting the lower chord member; h steel platforms are arranged at the upper end and the lower end of the portal frame;
(4) processing the upright rods and the web members which meet the support requirements into a lattice combined second support which is used as a second support for installing and assembling the lower chord member in sections; h steel platforms are arranged at the upper end and the lower end of the second support;
(5) mounting supports for assembling the lower chord sections, arranging an assembling jig frame at the upper part, sequentially hanging the lower chord sections on the jig frame for assembling, and controlling the spatial position of the lower chord mounting sections according to the theoretical coordinates of the control points selected in the step (2) to ensure the spatial positioning and mounting precision; a rotary hinge joint is arranged at the joint of the lower end of the lower chord and the bracket of the side upright post;
(6) dividing the lower chord assembling sections into two groups, welding the lower chord assembling sections into two arc sections in sequence, and inspecting to be qualified;
(7) installing a portal structure for rotary lifting, respectively arranging an anchorage and a lifting gusset plate at the top end of the portal and the position close to the midspan of a lower chord, pulling a cable rope, and checking to be qualified;
(8) starting to rotate and lift the lower chord member, firstly lifting the arc-shaped segment on the right side, and after the arc-shaped segment on the right side is lifted in place, retesting and fixing; then lifting the arc-shaped segment at the left side to a proper position and fixing;
(9) a lower chord embedding section is arranged between the two arc sections;
(10) welding a welding seam between the middle embedding section and the two installation sections, then welding a welding seam between the lower chord member on one side and the bracket of the side upright post, and finally welding a welding seam between the lower chord member on the other side and the bracket of the side upright post; and the welding seams at the two sides can not be welded simultaneously;
(11) sequentially installing components such as vertical web members, inclined struts and the like from two sides to the middle until the installation is finished;
(12) and after welding and inspection are qualified, dismantling temporary tools such as an assembling support, a portal frame, a rotary hinge joint and the like.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010586268.3A CN111779135A (en) | 2020-06-24 | 2020-06-24 | Arch coupon steel structure and installation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010586268.3A CN111779135A (en) | 2020-06-24 | 2020-06-24 | Arch coupon steel structure and installation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427300A (en) * | 2021-12-21 | 2022-05-03 | 江苏沪宁钢机股份有限公司 | Bucket arch assembling and lifting method |
-
2020
- 2020-06-24 CN CN202010586268.3A patent/CN111779135A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427300A (en) * | 2021-12-21 | 2022-05-03 | 江苏沪宁钢机股份有限公司 | Bucket arch assembling and lifting method |
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