CN116876363A - Positioning and mounting method for steel pipe arch bridge arch rib supporting tube bracket - Google Patents

Positioning and mounting method for steel pipe arch bridge arch rib supporting tube bracket Download PDF

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Publication number
CN116876363A
CN116876363A CN202310838734.6A CN202310838734A CN116876363A CN 116876363 A CN116876363 A CN 116876363A CN 202310838734 A CN202310838734 A CN 202310838734A CN 116876363 A CN116876363 A CN 116876363A
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China
Prior art keywords
mounting
positioning
tube bracket
arch rib
bracket
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CN202310838734.6A
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Inventor
刘承权
雷斌
王超
李静
王碧辉
宋雪梅
李仁全
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China 19th Metallurgical Corp Chengdu Construction Co ltd
China 19th Metallurgical Corp
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China 19th Metallurgical Corp Chengdu Construction Co ltd
China 19th Metallurgical Corp
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Priority to CN202310838734.6A priority Critical patent/CN116876363A/en
Publication of CN116876363A publication Critical patent/CN116876363A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
    • G01C15/002—Active optical surveying means
    • G01C15/004—Reference lines, planes or sectors
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D4/00—Arch-type bridges
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/17—Mechanical parametric or variational design
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25—Greenhouse technology, e.g. cooling systems therefor

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • General Physics & Mathematics (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Remote Sensing (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Evolutionary Computation (AREA)
  • General Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Laser Beam Processing (AREA)

Abstract

The application discloses a positioning and mounting method for a steel pipe arch bridge arch rib supporting tube bracket, and belongs to the technical field of construction processes of steel structure bridge engineering structures. The positioning and mounting method for the bracket of the arch rib supporting tube of the steel tube arch bridge can be used for directly and accurately preassembling the bracket to the corresponding position on the left arch rib and/or the right arch rib of the steel truss. The positioning and mounting method comprises the steps of firstly establishing a BIM model according to the ratio of 1:1, then preparing an assembled arch rib and preparing a support tube bracket based on the BIM model, marking intersecting lines, the size of part assembly, the center point of part positioning and a cross line of part mounting on the arch rib and the support tube bracket based on the BIM model, then cutting the intersecting lines of the connecting ends of the support tube bracket, mounting a laser positioner in the support tube bracket, and finally mounting the support tube bracket on the corresponding position of the arch rib by means of the center point of the laser positioner and the part positioning and the alignment of the cross mounting line so as to finish the mounting work in a support tube bracket factory on the arch rib.

Description

Positioning and mounting method for steel pipe arch bridge arch rib supporting tube bracket
Technical Field
The application relates to a positioning and mounting method, in particular to a positioning and mounting method for a steel pipe arch bridge arch rib supporting tube bracket, and belongs to the technical field of construction technology of steel structure bridge engineering structures.
Background
The steel structure has the characteristics of light dead weight, high assembly and construction speed and the like, and more bridge projects adopt the steel structure. In recent years, large-span bridges crossing rivers and river are taken up, and a combined structure of a steel pipe arch and a steel box girder is adopted in many cases. In the manufacturing and installation of the steel pipe arch, the factors of ultra-wide transportation and ultra-limit are limited, the left arch rib and the right arch rib need to be disassembled and transported, and the bracket needs to be installed firstly for supporting pipe connection between the two ribs so as to facilitate the installation of supporting pipes on a construction site. The mounting point and the angle of the bracket are accurately controlled, the bracket and the supporting tube can be connected and aligned, the butt joint seam is ensured to be aligned, the seam width meets the welding design requirement, and the welding quality and the stress condition of the supporting structure can be ensured. The large distance between the left and right arch ribs and the large supporting tube angle cause great difficulty for the positioning of the bracket. The conventional method is to spot weld the bracket and the support tube together, then hoist and position the bracket and fix the bracket by electric welding, then cut and demount the support tube, and weld the bracket. The process method occupies long time of the hoisting equipment, has influence on the appearance quality of the welding surface, increases the workload of assembly spot welding and cutting, has lower assembly efficiency, is not beneficial to saving electric energy, welding materials and cutting gas, and increases the safety risk.
The existing pipe truss installation and positioning technology, namely the positioning method marked on the main rod piece is adopted in CN 103389081B of the positioning method of the intersecting opening space of the secondary rod of the pipe truss, is applicable to the condition that the secondary rod piece is directly connected without a bracket, and cannot be used for determining the installation angle of the connecting bracket of the overlong rod piece.
Disclosure of Invention
The technical problems to be solved by the application are as follows: the positioning and mounting method for the bracket of the arch rib supporting tube of the steel tube arch bridge can be used for directly and accurately preassembling the bracket to the corresponding position on the left arch rib and/or the right arch rib of the steel truss.
The technical scheme adopted for solving the technical problems is as follows: a positioning and installing method for a steel pipe arch bridge arch rib supporting tube bracket includes the steps of firstly establishing a BIM model according to a ratio of 1:1, then preparing an assembled arch rib based on the BIM model, preparing the supporting tube bracket, marking intersecting lines, part assembling sizes, part positioning center points and part installing cross lines on the arch rib and the supporting tube bracket based on the BIM model, cutting intersecting lines of connecting ends of the supporting tube bracket, installing a laser positioner in the supporting tube bracket, and finally installing the supporting tube bracket on corresponding positions of the arch rib on the supporting tube bracket factory by means of alignment and alignment of the laser positioner and the part positioning center points and the cross installing lines to complete the installation work in the supporting tube bracket factory on the arch rib.
Further, when building the BIM model, modeling is carried out according to the design line shape, specification and material of the arch rib in a 1:1 mode.
The preferred mode of the scheme is that the arch rib is prepared based on the BIM model according to the following steps,
according to the steps of circular tube unfolding, blanking, tube coiling, tube joint longitudinal seam welding, segment assembly and segment girth welding, the arch rib unit segment manufacturing is completed.
Further, when cutting of the intersecting line of the support tube bracket is completed based on the BIM model, four directional positioning marks of 0 degrees, 90 degrees, 180 degrees and 270 degrees are respectively marked at the shortest length of 0 degrees.
The preferable mode of the scheme is that when the dimension of each assembly part and the center point of part positioning are marked based on the BIM model, a deepened design drawing is generated by utilizing the BIM model, then the center point of the support tube bracket is marked on the assembled and welded arch rib section according to the deepened design drawing by using a marker, and cross mark lines are made along the longitudinal direction and the circumferential direction of the support tube bracket through the center point.
When the laser positioner is installed in the supporting tube bracket, the supporting bracket is firstly placed horizontally, then the supporting frame is placed in the center positioning device of the supporting tube bracket, the supporting rod of the supporting frame is extended to enable the magnet to be adhered to the tube wall, then the laser positioner is installed on the supporting frame, and the laser positioner is opened to enable detection light to coincide with the axial middle winding of the supporting tube bracket, so that the installation is completed.
When the support tube bracket is mounted on the arch rib, the left arch rib and the right arch rib are correspondingly placed according to coordinates provided by the BIM model, the support tube bracket provided with the laser positioner is assembled with the corresponding arch rib, so that laser points are respectively overlapped with the center of a cross line of the left arch rib or the right arch rib, four azimuth marks on the support tube bracket are respectively aligned with the cross line on the arch rib, then the support tube bracket is fixed by spot welding to complete the mounting of the support tube bracket on the arch rib, and the like until the mounting of all support tube brackets of the left arch rib and the right arch rib is completed.
Further, the support rods for installing the laser positioners are three groups, each group of support rods comprises a self-supporting support seat, a support connecting rod and a movable adjusting piece, the movable adjusting piece is axially arranged on the support connecting rod, and the support connecting rod which is in place is adjusted under the cooperation of the support frame through the movable adjusting piece, and is detachably and fixedly connected with the inner side wall of the end part of the steel pipe to be installed through the self-supporting support seat.
The support frame for installing the laser locator comprises a self-adaptive adjusting component, an installation sealing plate and a shell, wherein the laser locator is arranged on the shell, the shell is covered on the installation sealing plate, and the self-adaptive adjusting component is arranged in an installation cavity formed by the shell and the installation sealing plate through the installation sealing plate; the self-adaptive adjusting component comprises six self-adaptive adjusting component groups, wherein the self-adaptive adjusting component groups are distributed on the mounting sealing plate along the circumferential direction, each supporting connecting rod is clamped between two pairs of four self-adaptive adjusting component groups by taking the geometric center of the mounting sealing plate as a movable supporting point through the axial center line of the movable adjusting component, and the movable adjusting component of one supporting connecting rod is respectively matched with the two pairs of four self-adaptive adjusting component groups on the same diameter and is arranged on the self-adaptive adjusting component in a reciprocating manner relative to the mounting frame along the axial direction; each self-adaptive adjusting piece group at least comprises a set of rolling support bearing, a mounting shaft and a set of adjusting gear, the adjusting gear is fixedly arranged on the inner ring of the rolling support bearing through the mounting shaft, and the moving adjusting piece is a set of racks axially arranged on two side surfaces of the support connecting rod.
Further, the support frame for installing the laser positioner comprises self-adaptive adjusting components, installation sealing plates and a shell, the side wall of the shell is provided with a plurality of through holes which are equivalent to the number of the support connecting rods, the shell is covered on the installation sealing plates, the self-adaptive simple adjusting components are arranged in an installation cavity formed by the shell and the installation sealing plates through the installation sealing plates, the laser positioner is arranged at one end part of the self-adaptive simple adjusting components, which penetrates out of the shell from the end surface, and the support connecting rods, of which the two ends extend out of the through holes, are movably connected with the part, positioned in the installation cavity, of the self-adaptive simple adjusting components through moving adjusting parts; the self-adaptive simple adjusting assembly at least comprises a set of rolling support bearing, a mounting shaft and a pair of adjusting gears, wherein the adjusting gears are fixedly arranged on an inner ring of the rolling support bearing through the mounting shaft, the rolling support bearing is arranged on the mounting sealing plate through an outer ring, the movable adjusting piece is a group of racks axially arranged on one side surface of the support connecting rod, the racks of each support connecting rod are respectively meshed with the adjusting gears on the mounting shaft under the matching of the shell, and the laser locator is arranged on one end of the mounting shaft penetrating out of the shell from the end surface; the three support connecting rods comprise a solid rod and two slotting rods, the cross-sectional areas of the two slotting rods are equal to that of the solid rod, slotted holes formed in the two slotting rods are gradually enlarged, the three support connecting rods which are circumferentially arranged are inserted into the slotting rod with the relatively smaller slotted holes according to the solid rod, and the slotting rod with the relatively smaller slotted holes is inserted into the through hole of the slotting rod with the relatively larger slotted holes to pass through the shell.
The beneficial effects of the application are as follows: the positioning and mounting method provided by the application comprises the steps of firstly establishing a BIM model according to the ratio of 1:1, then preparing an assembled arch rib and preparing a support tube bracket based on the BIM model, marking intersecting lines, the size of part assembly, the center point of part positioning and a cross line of part mounting on the arch rib and the support tube bracket based on the BIM model, then cutting the intersecting lines of the connecting ends of the support tube bracket, mounting a laser positioner in the support tube bracket, and finally mounting the support tube bracket on the corresponding position of the arch rib by means of the center point of the laser positioner and the part positioning and the alignment of the cross mounting line so as to finish the mounting work in a support tube bracket factory on the arch rib. When the bracket steel pipes are independently arranged on the left arch rib and/or the right arch rib which are needed to be butted, the two groups of steel pipes with connection relationship are aligned by the laser alignment aligner. According to the welding fixture, the current situation that spot welding butt joint between bracket steel pipes and connecting pieces is needed in the prior art, then installation is carried out under the pre-installation state of arch ribs, spot welding is carried out, finally, after the connecting pieces are removed, the bracket steel pipes are welded to corresponding positions of the arch ribs is changed, laser alignment counterpoint instruments are directly installed in two groups of bracket steel pipes which need to be in butt joint, and then alignment and counterpoint are carried out through the laser alignment counterpoint instruments when the corresponding bracket steel pipes are installed to the corresponding positions of the arch ribs, namely butt spot welding of the bracket steel pipes and the connecting pieces is omitted, the subsequent dismantling work is omitted, the purpose that the bracket can be directly pre-installed to the corresponding positions on the arch ribs of the steel truss is achieved, the assembly speed is improved, and the assembly quality can be effectively guaranteed.
Drawings
FIG. 1 is a schematic diagram of the assembly structure of a rib, bracket and support connectors involved in the positioning and mounting method for a rib support tube bracket of a steel tube arch bridge of the present application;
FIG. 2 is a schematic diagram of the arrangement of the laser positioner in the bracket according to the method for positioning and mounting the bracket of the arch rib support tube of the steel tube arch bridge;
fig. 3 and 4 are three-dimensional schematic diagrams of a structure of a strut and a support frame for installing a laser positioner, which are related to a positioning and installing method for a steel tube arch bridge arch rib support tube bracket, with a shell and a shell removed;
fig. 5 and 6 are three-dimensional schematic diagrams of a support rod for installing a laser positioner and another structure of a support frame, which are related to the positioning and installing method for the steel tube arch bridge arch rib support tube bracket, with a shell and a shell removed.
Marked in the figure as: the device comprises an arch rib 1, a supporting tube bracket 2, a laser positioner 3, a supporting frame 4, a supporting rod 5, a self-supporting seat 6, a supporting connecting rod 7, a movable adjusting piece 8, a self-adaptive adjusting component 9, a mounting sealing plate 10, a self-adaptive adjusting piece group 11, a rolling supporting bearing 12, a mounting shaft 13, an adjusting gear 14 and a shell 15.
Detailed Description
The application provides a positioning and mounting method for supporting tube brackets of steel tube arch bridge arch ribs, which can directly and accurately preassemble brackets on corresponding positions of left arch ribs and/or right arch ribs of a steel truss as shown in fig. 1-6. The positioning and mounting method comprises the steps of firstly establishing a BIM model according to the ratio of 1:1, then preparing an assembled arch rib 1 and a support tube bracket 2 based on the BIM model, marking intersecting lines, part assembly sizes, part positioning center points and part mounting cross lines on the arch rib 1 and the support tube bracket 2 based on the BIM model, then cutting intersecting lines of the connection ends of the support tube bracket 2, mounting a laser positioner 3 in the support tube bracket 2, and finally mounting the support tube bracket 2 on corresponding positions of the arch rib 1 on the support tube bracket 2 by means of alignment of the laser positioner 3 and the part positioning center points and the cross mounting lines so as to finish the mounting work in a factory of the support tube bracket 2 on the arch rib 1. The positioning and mounting method provided by the application comprises the steps of firstly establishing a BIM model according to the ratio of 1:1, then preparing an assembled arch rib and preparing a support tube bracket based on the BIM model, marking intersecting lines, the size of part assembly, the center point of part positioning and a cross line of part mounting on the arch rib and the support tube bracket based on the BIM model, then cutting the intersecting lines of the connecting ends of the support tube bracket, mounting a laser positioner in the support tube bracket, and finally mounting the support tube bracket on the corresponding position of the arch rib by means of the center point of the laser positioner and the part positioning and the alignment of the cross mounting line so as to finish the mounting work in a support tube bracket factory on the arch rib. When the bracket steel pipes are independently arranged on the left arch rib and/or the right arch rib which are needed to be butted, the two groups of steel pipes with connection relationship are aligned by the laser alignment aligner. According to the welding fixture, the current situation that spot welding butt joint between bracket steel pipes and connecting pieces is needed in the prior art, then installation is carried out under the pre-installation state of arch ribs, spot welding is carried out, finally, after the connecting pieces are removed, the bracket steel pipes are welded to corresponding positions of the arch ribs is changed, laser alignment counterpoint instruments are directly installed in two groups of bracket steel pipes which need to be in butt joint, and then alignment and counterpoint are carried out through the laser alignment counterpoint instruments when the corresponding bracket steel pipes are installed to the corresponding positions of the arch ribs, namely butt spot welding of the bracket steel pipes and the connecting pieces is omitted, the subsequent dismantling work is omitted, the purpose that the bracket can be directly pre-installed to the corresponding positions on the arch ribs of the steel truss is achieved, the assembly speed is improved, and the assembly quality can be effectively guaranteed.
Correspondingly, in order to improve the assembly efficiency and reduce auxiliary procedures of the device process according to the process flow, the application carries out 1:1 modeling according to the design line shape, specification and material of the arch rib when the BIM model is established. When the arch rib 1 is prepared based on the BIM model, the following steps are carried out according to the steps of round pipe expanding, blanking, pipe coiling, pipe joint longitudinal seam welding, segment assembly and segment circumferential seam welding until the manufacture of the arch rib unit segment is completed. When cutting the intersecting line of the support tube bracket 2 is completed based on the BIM model, four direction positioning marks of 0 degrees, 90 degrees, 180 degrees and 270 degrees are respectively marked at the shortest length of 0 degrees. When the dimension of each assembly part and the center point of part positioning are marked based on the BIM model, a deepened design drawing is generated by utilizing the BIM model, then the center point of the support tube bracket 2 is marked on the assembled and welded arch rib section according to the deepened design drawing by using a marker pen, and cross mark lines are made along the longitudinal direction and the circumferential direction of the support tube bracket 2 through the center point.
Furthermore, in order to facilitate the installation of the laser positioner and improve the installation effect, when the laser positioner 3 is installed in the support tube bracket 2, the support bracket 2 is firstly horizontally placed, then the support frame 4 is placed in the center positioning device of the support tube bracket 2, the supporting rod 5 of the support frame 4 is extended to enable the magnet to be adhered to the tube wall, then the laser positioner 3 is installed on the support frame 4, and the laser positioner 4 is opened to enable the detection light to coincide with the axial middle line of the support tube bracket 2 to finish the installation. When the support tube bracket 2 is installed on the arch rib 1, the left arch rib and the right arch rib are correspondingly placed according to coordinates provided by the BIM model, the support tube bracket 2 provided with the laser positioner 3 is assembled with the corresponding arch rib 1, laser points are respectively overlapped with the center of a cross line of the left arch rib or the right arch rib, four azimuth marks on the support tube bracket 2 are respectively aligned with the cross line on the arch rib, then the support tube bracket 2 is fixed by spot welding to complete the installation of the support tube bracket 2 on the arch rib 1, and the like until the installation of all support tube brackets 2 of the left arch rib and the right arch rib is completed. The rib of the present application generally comprises a left rib and a right rib, and the left rib and the right rib are completely symmetrical.
More specifically, the supporting rods 5 for installing the laser positioners 3 are three groups, each group of supporting rods 5 comprises a self-supporting seat 6, a supporting connecting rod 7 and a movable adjusting piece 8, the movable adjusting piece 8 is axially arranged on the supporting connecting rod 7, and the supporting connecting rod 7 which is adjusted to be in place through the movable adjusting piece 8 under the cooperation of the supporting frame 4 is detachably and fixedly connected with the inner side wall of the end part of a steel pipe to be installed through the self-supporting seat 6. The supporting frame 4 has at least two structures, wherein one supporting frame 4 for installing the laser locator 3 comprises an adaptive adjusting component 9, an installing sealing plate 10 and a shell 15, the laser locator 3 is arranged on the shell 15, the shell 15 is covered on the installing sealing plate 10, and the adaptive adjusting component 9 is arranged in an installing cavity formed by the shell 15 and the installing sealing plate 10 through the installing sealing plate 10; the self-adaptive adjusting assembly 9 comprises six self-adaptive adjusting element groups 11, wherein each self-adaptive adjusting element group 11 is circumferentially arranged on an installation sealing plate 10, each supporting connecting rod 7 is clamped between two pairs of four self-adaptive adjusting element groups 11 by taking the geometric center of the installation sealing plate 10 as a movable supporting point through the axial center line of the movable adjusting element 8, and the movable adjusting element 8 of one supporting connecting rod 7 is respectively matched with the two pairs of four self-adaptive adjusting element groups 11 on the same diameter and is arranged on the self-adaptive adjusting assembly 9 in a reciprocating manner relative to the installation frame 4 along the axial direction; each self-adaptive adjusting member set 11 at least comprises a set of rolling support bearings 12, a mounting shaft 13 and a set of adjusting gears 14, wherein the adjusting gears 14 are fixedly arranged on the inner rings of the rolling support bearings 12 through the mounting shafts 13, and the moving adjusting members 8 are a set of racks axially arranged on two side surfaces of the support connecting rod 7. The other structure is that the supporting frame 4 for installing the laser positioner 3 comprises an adaptive adjusting component 9, an installing sealing plate 10 and a shell 15, the side wall of the shell 15 is provided with a plurality of through holes which are equivalent to the number of supporting connecting rods, the shell 15 is covered on the installing sealing plate 10, the adaptive simple adjusting component 9 is arranged in an installing cavity formed by the shell 15 and the installing sealing plate 10 through the installing sealing plate 10, the laser positioner 3 is arranged at one end part of the adaptive simple adjusting component 9, which penetrates out of the shell 15 from the end surface, and the supporting connecting rods 7, the two ends of which extend out of the through holes, are movably connected with the part of the adaptive simple adjusting component 9, which is positioned in the installing cavity, through moving adjusting pieces 8; the self-adaptive simple adjusting assembly 9 at least comprises a set of rolling support bearings 12, a mounting shaft 13 and a pair of adjusting gears 14, wherein the adjusting gears 14 are fixedly arranged on the inner rings of the rolling support bearings 12 through the mounting shaft 13, the rolling support bearings 12 are arranged on the mounting sealing plate 10 through the outer rings, the movable adjusting piece 8 is a group of racks axially arranged on one side surface of the support connecting rod 7, the racks of each support connecting rod 7 are respectively meshed with the adjusting gears 14 on the mounting shaft 13 under the matching of the shell 15, and the laser positioner 3 is arranged on the end of the mounting shaft 13 penetrating out of the shell 15 from the end surface; the three support connecting rods 7 comprise a solid rod and two grooving rods, the cross-sectional areas of the two grooving rods are equal to that of the solid rod, the slotted holes formed in the two grooving rods are gradually enlarged, the three support connecting rods 7 arranged along the circumferential direction are inserted into the grooving rod with the relatively smaller slotted holes according to the solid rod, and the grooving rod with the relatively smaller slotted holes is inserted into the through hole of the grooving rod with the relatively larger slotted holes to pass through the shell 15.
In summary, compared with the traditional method and the prior art, the positioning and mounting method provided by the application mainly obtains the accurate positioning point through the BIM and cuts the accurate correlation of the pipe joint bracket, and realizes the accurate positioning and mounting of the connecting pipe fitting through the pipeline laser positioning device, so that the working procedures of pre-splicing welding, re-cutting, pre-assembling and the like of the pipe joint connecting piece and the bracket are reduced, the driving occupation is reduced, the occupation of working hours and production mechanical appliances and the consumption of auxiliary materials are reduced, and the effects of improving the production efficiency, saving energy and reducing emission are achieved.
The technical scheme of the application is further described by the following specific examples:
in the manufacturing and construction process of the steel pipe arch rib, the left-right distance of the steel pipe truss arch rib is large, so that the steel pipe truss arch rib cannot be transported if the whole steel pipe arch rib leaves a factory to be ultra-wide and ultra-limited. Through the demonstration of the scheme, the supporting tube between the left arch rib and the right arch rib is the optimal scheme through the bracket for assembly connection on site, and the bracket can be assembled and welded in a workshop or a site pre-assembled site. Because the clear distance between the left arch rib and the right arch rib reaches 16.5 meters, the whole support tube is preassembled by the prior art method, the locating point and the angle of the bracket can be accurately determined, otherwise, the welding connection quality of the support tube cannot be ensured, and the whole quality of the project is further influenced. However, the long-time driving occupation is realized during the assembly and positioning, and meanwhile, the bracket and the supporting tube are required to be temporarily welded and segmented, so that the working procedures, the energy consumption and auxiliary materials are increased, the quality of the butt joint groove surface is also influenced by the segmentation, and the manufacturing safety is influenced. In order to solve the technical problem, a supporting tube bracket mounting, positioning and connecting method is developed.
The implementation steps are as follows:
1. and (3) building a 1:1 BIM model according to the design line shape, specification and material of the arch rib.
2. And (3) using a BIM model to finish the manufacture of the arch rib unit section according to the main process sequence of round tube expansion, blanking, tube rolling, tube section longitudinal seam welding, section assembly and section circumferential seam welding.
3. And (3) cutting the intersecting line of the bracket of the support tube by using a BIM model, and marking the positioning marks in the directions of 0 degree, 90 degrees, 180 degrees and 270 degrees respectively at the position with the shortest length of 0 degree.
4. And generating a deepened design drawing by using the BIM model, and marking the size of each assembly part and the part positioning center point.
5. Marking according to a deepened design drawing, marking a center point of a bracket by using a marker on the assembled and welded arch rib section, and making cross mark lines along the longitudinal direction and the circumferential direction of the pipe joint through the center point.
6. The bracket pipe joint is horizontally placed, the supporting pipe bracket center positioning device is placed in a pipeline, the supporting rod is extended, the magnet is adhered to the pipe wall, and the laser is turned on.
7. And correspondingly placing the left arch rib and the right arch rib according to coordinates provided by the BIM model. And assembling the bracket provided with the pipeline center positioning device with the corresponding arch rib. The laser points are respectively overlapped with the centers of the cross lines of the left and right webs, and the four azimuth marks of the bracket are respectively aligned with the cross lines on the arch ribs. And then fixing the bracket by spot welding.
8. The opposite side rib brackets, and the remaining brackets, are installed in the same manner.
9. And (5) welding intersecting line weld joints of the bracket.
Example 1
Taking the assembly of a bracket connected with a large bridge arch rib support as an example, the main arch rib steel pipe is a phi 960 multiplied by 28 coiled steel pipe, the transverse support is a phi 500 multiplied by 12 finished steel pipe, the inclined support is a phi 402 multiplied by 12 finished steel pipe, and the bracket is connected with the bracket in the same specification.
1. And (3) designing lines, specifications and materials according to arch ribs, establishing a 1:1 complete BIM model, splitting segments according to an installation scheme, a manufacturing scheme and a customized plate size, and cutting a model intersecting line. The complete BIM model is built, so that the accuracy of the support size and the positioning can be ensured, deviation can be avoided, and model data can be provided for deepening the design drawing, the whole manufacturing and the installation.
2. And (3) using a BIM model to finish the manufacture of the arch rib unit section according to the main process sequence of round tube expansion, blanking, tube rolling, tube section longitudinal seam welding, section assembly and section circumferential seam welding.
3. And converting and outputting intersecting line data of the transverse brace and the diagonal brace bracket into identifiable cutting codes of an intersecting line cutting machine by using a BIM model, and cutting the intersecting line of the finished pipe on the intersecting line cutting machine, wherein the shortest length is 0 DEG, and positioning marks in four directions of 0 DEG, 90 DEG, 180 DEG and 270 DEG are respectively marked.
4. And generating a deepened design drawing by using the BIM model, and marking the size of each assembled part and the size of a part positioning point.
5. Marking according to a deepened design drawing, marking a center point of a bracket by using a marker pen on the assembled and welded arch rib section, and making a cross line along the longitudinal direction and the circumferential direction of the pipe joint through the center point, wherein the length of the marking line is larger than the pipe diameter of the bracket.
6. (1) horizontally placing the bracket pipe joint, placing the pipeline center positioning device into the pipeline, extending the supporting rod, enabling the magnet to be adhered to the pipe wall, and opening the laser. (2) Because the struts are synchronously telescopic, the lengths of the struts are consistent, and the struts can be determined to be positioned on the circular section of the pipe joint. (3) The strut magnets are circular, and 2 contact points of each circular magnet and the tube wall are also positioned on the circular section.
The bracket pipe joint is horizontally placed, so that the pipe center positioning device can find out the circular section under the action of gravity. (2) And (3) further ensuring that the pipe centering device is located on the circular cross-section of the pipe, thereby ensuring that the laser line is parallel to the pipe.
7. And correspondingly placing the left arch rib and the right arch rib according to coordinates provided by the BIM model. And assembling the bracket provided with the pipeline center positioning device with the corresponding arch rib. The laser points are respectively overlapped with the centers of the cross lines of the left and right webs, and the four azimuth marks of the bracket are respectively aligned with the cross lines on the arch ribs. And then fixing the bracket by spot welding.
8. The opposite side rib brackets, and the remaining brackets, are installed in the same manner.
9. And (5) welding intersecting line weld joints of the bracket.

Claims (10)

1. The positioning and mounting method for the steel pipe arch bridge arch rib supporting tube bracket is characterized by comprising the following steps of: the positioning and mounting method comprises the steps of firstly establishing a BIM model according to the ratio of 1:1, then preparing an assembled arch rib (1) and a support tube bracket (2) based on the BIM model, marking intersecting lines, the size of part assembly, the center point of part positioning and cross lines of part mounting on the arch rib (1) and the support tube bracket (2) based on the BIM model, then cutting the intersecting lines of the connecting ends of the support tube bracket (2) and mounting a laser positioner (3) in the support tube bracket (2), and finally mounting the support tube bracket (2) on the corresponding position of the arch rib (1) by means of the laser positioner (3) and the center point of part positioning and the cross mounting line alignment and alignment so as to finish the mounting work in a support tube bracket (2) factory on the arch rib (1).
2. The positioning and mounting method for the steel tube arch bridge rib support tube bracket according to claim 1, wherein the positioning and mounting method comprises the following steps: when building the BIM model, 1:1 modeling is carried out according to the design line shape, specification and material of the arch rib.
3. The positioning and mounting method for the steel tube arch bridge rib support tube bracket according to claim 2, wherein the positioning and mounting method comprises the following steps: the preparation of the rib (1) based on the BIM model is carried out according to the following steps,
according to the steps of circular tube unfolding, blanking, tube coiling, tube joint longitudinal seam welding, segment assembly and segment girth welding, the arch rib unit segment manufacturing is completed.
4. A positioning and mounting method for steel pipe arch bridge rib support tube brackets according to claim 1, 2 or 3, characterized in that: when cutting the intersecting line of the support tube bracket (2) is completed based on the BIM model, four direction positioning marks of 0 degree, 90 degrees, 180 degrees and 270 degrees are respectively marked at the shortest length.
5. The positioning and mounting method for the steel tube arch bridge rib support tube bracket according to claim 4, wherein the positioning and mounting method comprises the following steps: when the dimension of each assembly part and the center point of part positioning are marked based on the BIM model, a deepened design drawing is generated by utilizing the BIM model, then the center point of the support tube bracket (2) is marked on the assembled and welded arch rib section according to the deepened design drawing by using a marker pen, and cross mark lines are made along the longitudinal direction and the circumferential direction of the support tube bracket (2) through the center point.
6. The positioning and mounting method for the steel tube arch bridge rib support tube bracket according to claim 5, wherein the positioning and mounting method comprises the following steps: when the laser locator (3) is installed in the supporting tube bracket (2), the supporting bracket (2) is firstly placed horizontally, then the supporting frame (4) is placed in the center positioning device of the supporting tube bracket (2) and the supporting rod (5) of the supporting frame (4) is extended to enable the magnet to be adhered to the tube wall, then the laser locator (3) is installed on the supporting frame (4) and the laser locator (4) is opened to enable detection light rays to coincide with the axial middle winding of the supporting tube bracket (2) to finish installation.
7. The positioning and mounting method for the steel tube arch bridge rib support tube bracket according to claim 6, wherein the positioning and mounting method comprises the following steps: when the support tube bracket (2) is installed on the arch rib (1), the left arch rib and the right arch rib are correspondingly placed according to coordinates provided by the BIM model, the support tube bracket (2) provided with the laser positioner (3) is assembled with the corresponding arch rib (1), laser points are respectively overlapped with the cross line center of the left arch rib or the right arch rib, four azimuth marks on the support tube bracket (2) are respectively aligned with the cross line on the arch rib, then the support tube bracket (2) is spot-welded and fixed to complete the installation of the support tube bracket (2) on the arch rib (1), and the like until the installation of all the support tube brackets (2) of the left arch rib and the right arch rib is completed.
8. The positioning and mounting method for the steel tube arch bridge rib support tube bracket of claim 7, wherein: the support rods (5) for installing the laser positioners (3) are recorded in three groups, each group of support rods (5) comprises a self-supporting support seat (6), a supporting connecting rod (7) and a movable adjusting piece (8), the movable adjusting piece (8) is axially arranged on the supporting connecting rod (7), and the supporting connecting rod (7) which is in place is adjusted under the cooperation of the supporting frame (4) through the movable adjusting piece (8) and is detachably and fixedly connected with the inner side wall of the end part of the steel pipe to be installed through the self-supporting support seat (6).
9. The positioning and mounting method for the steel tube arch bridge rib support tube bracket of claim 8, wherein the method comprises the following steps: the support frame (4) for mounting the laser locator (3) comprises a self-adaptive adjusting component (9), a mounting sealing plate (10) and a shell (15), wherein the laser locator (3) is arranged on the shell (15), the shell (15) is covered on the mounting sealing plate (10), and the self-adaptive adjusting component (9) is arranged in a mounting cavity formed by the shell (15) and the mounting sealing plate (10) through the mounting sealing plate (10); the self-adaptive adjusting assembly (9) comprises six self-adaptive adjusting element groups (11), wherein the self-adaptive adjusting element groups (11) are distributed on the mounting sealing plate (10) along the circumferential direction, each supporting connecting rod (7) is clamped between two pairs of four self-adaptive adjusting element groups (11) by moving the axial center line of the adjusting element (8) and taking the geometric center of the mounting sealing plate (10) as a moving supporting point, the moving adjusting element (8) of one supporting connecting rod (7) is respectively matched with the two pairs of four self-adaptive adjusting element groups (11) on the same diameter and is arranged on the self-adaptive adjusting assembly (9) in a reciprocating manner relative to the mounting frame (4) along the axial direction; each self-adaptive adjusting piece group (11) at least comprises a set of rolling support bearing (12), a mounting shaft (13) and a set of adjusting gear (14), the adjusting gear (14) is fixedly arranged on the inner ring of the rolling support bearing (12) through the mounting shaft (13), and the movable adjusting piece (8) is a set of racks axially arranged on two sides of the support connecting rod (7).
10. The positioning and mounting method for the steel tube arch bridge rib support tube bracket of claim 8, wherein the method comprises the following steps: the support frame (4) for installing the laser positioner (3) comprises a self-adaptive adjusting component (9), an installing sealing plate (10) and a shell (15), the side wall of the shell (15) is provided with a plurality of through holes which are equivalent to the number of supporting connecting rods, the shell (15) is covered on the installing sealing plate (10), the self-adaptive simple adjusting component (9) is arranged in an installing cavity formed by the shell (15) and the installing sealing plate (10) through the installing sealing plate (10), the laser positioner (3) is arranged on one end part of the self-adaptive simple adjusting component (9) penetrating out of the shell (15) from the end surface, and the supporting connecting rods (7) with the two ends extending out of the through holes are movably connected with the part of the self-adaptive simple adjusting component (9) located in the installing cavity through moving adjusting pieces (8); the self-adaptive simple adjusting assembly (9) at least comprises a set of rolling support bearings (12), a mounting shaft (13) and a pair of adjusting gears (14), wherein the adjusting gears (14) are fixedly arranged on the inner rings of the rolling support bearings (12) through the mounting shaft (13), the rolling support bearings (12) are arranged on the mounting sealing plates (10) through the outer rings, the movable adjusting piece (8) is a group of racks axially arranged on one side surface of the support connecting rod (7), the racks of the support connecting rods (7) are respectively meshed with the adjusting gears (14) on the mounting shaft (13) under the matching of the shell (15), and the laser positioner (3) is arranged on one end of the mounting shaft (13) penetrating out of the shell (15) from the end surface; the three support connecting rods (7) comprise a solid rod and two slotting rods, the cross-sectional areas of the two slotting rods are equal to that of the solid rod, slotted holes formed in the two slotting rods are gradually enlarged, the three support connecting rods (7) arranged along the circumferential direction are inserted into the slotting rod with the relatively smaller slotted holes according to the solid rod, and the slotting rod with the relatively smaller slotted holes is inserted into the through hole of the slotting rod with the relatively larger slotted holes to pass through the shell (15).
CN202310838734.6A 2023-07-10 2023-07-10 Positioning and mounting method for steel pipe arch bridge arch rib supporting tube bracket Pending CN116876363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310838734.6A CN116876363A (en) 2023-07-10 2023-07-10 Positioning and mounting method for steel pipe arch bridge arch rib supporting tube bracket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310838734.6A CN116876363A (en) 2023-07-10 2023-07-10 Positioning and mounting method for steel pipe arch bridge arch rib supporting tube bracket

Publications (1)

Publication Number Publication Date
CN116876363A true CN116876363A (en) 2023-10-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310838734.6A Pending CN116876363A (en) 2023-07-10 2023-07-10 Positioning and mounting method for steel pipe arch bridge arch rib supporting tube bracket

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