CN216615527U - Bed-jig is assembled to steel case roof beam - Google Patents
Bed-jig is assembled to steel case roof beam Download PDFInfo
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- CN216615527U CN216615527U CN202123376438.4U CN202123376438U CN216615527U CN 216615527 U CN216615527 U CN 216615527U CN 202123376438 U CN202123376438 U CN 202123376438U CN 216615527 U CN216615527 U CN 216615527U
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Abstract
The utility model discloses a steel box girder assembling jig frame which comprises a base, wherein a longitudinal distribution girder is horizontally fixed at the top end of the base, the longitudinal distribution girder is symmetrically arranged by taking a bridge longitudinal axis as a reference, and the central axis of the longitudinal distribution girder in the middle of the longitudinal distribution girder is superposed with the bridge longitudinal axis; the utility model effectively solves the problem of high-altitude assembly of the steel box girder, can ensure the manufacturing and mounting precision of the steel box girder under the condition of high-altitude construction, and simultaneously ensures the integral line shape of the bridge.
Description
Technical Field
The utility model belongs to the technical field of high-altitude manufacturing and installation of steel box girders, and particularly relates to a steel box girder assembling jig frame.
Background
With the rapid development of national infrastructure, the application of the steel box girder bridge is more and more extensive, the design form is more and more diversified, the construction requirement is higher and higher, and the manufacturing and installation process needs to overcome the limitations of various geographic environments and places. The prior large steel box girder is transported to a site for hoisting through a waterway after the whole section is manufactured in a factory; the method can also be used for separately hoisting parts of urban bridges which are limited in navigation or do not have integral installation conditions on site by adopting a method of manufacturing, transporting to the site and separately hoisting; and part of projects are limited by transportation, site conditions and the like, and cannot be manufactured in factories, and the hoisting plate units need to be assembled and installed in high altitude in situ of the bridge site. At present, similar construction experience in the aspect is few, and a reasonable and scientific steel box girder splicing jig frame suitable for the high-altitude general splicing requirement needs to be designed, so that the manufacturing and installation precision of a bridge is ensured.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a steel box girder assembling jig frame. The technical problem to be solved by the utility model is realized by the following technical scheme:
a steel box girder assembling jig frame comprises a base, wherein a longitudinal distribution girder is horizontally fixed at the top end of the base, the longitudinal distribution girder is symmetrically arranged by taking a bridge longitudinal axis as a reference, and the central axis of the longitudinal distribution girder in the middle of the longitudinal distribution girder is superposed with the bridge longitudinal axis; the top end of the longitudinal distribution beam is horizontally fixed with a transverse distribution beam, the transverse distribution beam is symmetrically arranged by taking the transverse axis of a pier as a reference, the central axis of the transverse distribution beam in the middle of the transverse distribution beam is superposed with the transverse axis of the pier, two ends of the transverse distribution beam are vertically fixed with positioning stop blocks, the width of a bottom plate of the steel box girder is controlled by the positioning stop blocks, a detection line of a transverse base line of the steel box girder is vertically arranged on the inner end surface of each positioning stop block, and the detection line is arranged by taking the central axis of the transverse distribution beam as a reference; and determining the position of the central bottom plate unit of the steel box girder by taking the detection line of the steel box girder transverse base line, the central axis of the longitudinal distribution girder and the central axis of the transverse distribution girder as references, and taking the detection line of the steel box girder transverse base line, the central axis of the longitudinal distribution girder and the central axis of the transverse distribution girder as the assembly references of the steel box girder.
Furthermore, elevation cushion blocks are arranged on the transverse distribution beams, and the elevation cushion blocks are symmetrically arranged by taking the central axis of the longitudinal distribution beam as a reference.
Furthermore, the elevation cushion blocks are arranged according to the positions of the steel box girder bottom plate composition units, at least three rows are arranged below each composition unit, and the elevation cushion blocks are respectively positioned at the butt joint position and the middle position of each composition unit.
Furthermore, the longitudinal distribution beams are all fixed with limiting blocks, and the limiting blocks are respectively abutted against one side of the transverse distribution beam.
Further, the base comprises a support and a cross beam, and the cross beam is fixed to the top end of the support along the direction of the transverse axis of the pier; the longitudinal distribution beam is fixed at the top end of the cross beam, and a steel plate is horizontally fixed between the lower ends of the cross beams to form a bottom layer construction platform.
Furthermore, an upper construction platform is fixed on the outer sides of two ends of the transverse distribution beam, and a safety guardrail is arranged on the outer side of the upper construction platform.
The utility model has the beneficial effects that:
1. the utility model effectively solves the problem of high-altitude assembly of the steel box girder, can ensure the manufacturing and mounting precision of the steel box girder under the condition of high-altitude construction, and simultaneously ensures the integral line shape of the bridge;
2. the utility model discloses a through combining construction condition and component characteristics, realize "always piece together + installation" integration construction, when guaranteeing construction safety nature, high efficiency, be adapted to complicated changeable site operation environment and structural style, can ensure the manufacturing quality of steel box girder bridge.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of portion A of FIG. 1;
FIG. 3 is a schematic structural diagram of portion B of FIG. 1;
figure 4 is a schematic view of the installation of a steel box girder segment.
Description of reference numerals:
1-a base; 2-longitudinal distribution beams; 3-transverse distribution beams; 4, positioning a stop block; 5-elevation cushion blocks; 6-a limiting block; 7-an upper construction platform; 1-1-scaffold; 1-2-beam; 1-3-a bottom layer construction platform; 2-1-central axis of longitudinal distribution beam; 3-1-central axis of transverse distribution beam; 4-1-detection line of steel box girder transverse base line; 7-1-safety barrier; 8-steel box girder.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Example 1
Referring to fig. 1 to 3, the embodiment of the utility model provides a steel box girder assembling jig, which specifically comprises a base 1, wherein a longitudinal distribution girder 2 is horizontally fixed at the top end of the base 1, the longitudinal distribution girder 2 is symmetrically arranged by taking a longitudinal axis of a bridge as a reference, and a central axis 2-1 of the longitudinal distribution girder in the middle of the longitudinal distribution girder coincides with the longitudinal axis of the bridge; the longitudinal distribution beam 2 is a main force transmission structure along the axial direction of the bridge.
The top end of the longitudinal distribution beam 2 is horizontally fixed with a transverse distribution beam 3, the transverse distribution beam 3 is symmetrically arranged by taking the transverse axis of a pier as a reference, the central axis 3-1 of the transverse distribution beam in the middle of the transverse distribution beam is overlapped with the transverse axis of the pier, the elevation and the line shape of the transverse distribution beam 3 are adjusted along with the linear change of the ground of the bridge, an I-shaped material meeting the height requirement and the rigidity requirement is selected, and the distance between the transverse distribution beams 3 is adjustable.
The two ends of the transverse distribution beam 3 are vertically fixed with positioning stop blocks 4, the width of the bottom plate of the steel box beam is controlled by the positioning stop blocks 4, a detection line 4-1 of a steel box beam transverse base line is vertically arranged on the inner end face of the positioning stop block 4, and the detection line 4-1 of the steel box beam transverse base line is arranged by taking the central axis 3-1 of the transverse distribution beam 3 as a reference; and determining the position of the central bottom plate unit of the steel box girder by taking the detection line 4-1 of the horizontal base line of the steel box girder, the central axis 2-1 of the longitudinal distribution girder and the central axis 3-1 of the transverse distribution girder as references, and taking the detection line 4-1 of the horizontal base line of the steel box girder, the central axis 2-1 of the longitudinal distribution girder and the central axis 3-1 of the transverse distribution girder as assembly references of the steel box girder.
Furthermore, elevation cushion blocks 5 are arranged on the transverse distribution beam 3, and the elevation cushion blocks 5 are symmetrically arranged by taking the central axis 2-1 of the longitudinal distribution beam as a reference; and the height of the elevation cushion block 5 is determined in sequence according to the designed elevation value of the bottom plate of the steel box girder. The elevation cushion block 5 is used for directly supporting the bottom plate unit of the steel box girder, accurately adjusting the elevation and the line shape of the bottom plate unit and ensuring the stability of the support of each bottom plate unit.
Specifically, the elevation cushion blocks 5 are arranged according to the positions of the steel box girder bottom plate composition units, at least three rows are arranged below each composition unit, and the elevation cushion blocks are respectively positioned at the butt joint position and the middle position of each composition unit. Namely, the elevation cushion blocks 5 are respectively positioned on the butt joint seam of the steel box girder bottom plate unit and the flange of the transverse distribution girder 3 in which the middle part is positioned.
Furthermore, the longitudinal distribution beams 2 are all fixed with limit blocks 6, and the limit blocks 6 respectively lean against one side of the transverse distribution beam 3. The stopper 6 is mainly used to prevent the transverse distribution beam 3 from being dislocated or toppled after being loaded when the transverse distribution beam is in a position where a slope exists, so that the movement of the transverse distribution beam 3 is limited.
Further, the base 1 comprises a support 1-1 and a cross beam 1-2, and the cross beam 1-2 is fixed at the top end of the support 1-1 along the direction of the transverse axis of the pier; the longitudinal distribution beam 2 is fixed at the top end of the cross beam 1-2, and a steel plate is horizontally fixed between the lower ends of the cross beams 1-2 to form a bottom layer construction platform 1-3.
An upper construction platform 7 is fixed on the outer sides of two ends of the transverse distribution beam 3, and a safety guardrail 7-1 is arranged on the outer side of the upper construction platform 7.
In order to meet the requirements of site construction, the bottom layer construction platform 1-3 is communicated with the upper layer construction platform 7, and the bottom layer construction platform 1-3 and the upper layer construction platform 7 are both used for facilitating measurement and other operations of operators. As construction auxiliary facilities, the upper construction platform 7 and the safety guardrail 7-1 ensure the safety and convenience of construction.
The steel box girder 8 completes high-altitude general assembly on the assembly jig frame described in the embodiment of the utility model, and the precision of bridge manufacture and installation is ensured.
Example 2
The embodiment of the utility model provides a manufacturing method of a steel box girder assembled jig frame, which specifically comprises the following steps:
step 1: laying a bottom layer construction platform on the built support, wherein the construction platform uses a beam, namely a support cross-section as a framework for bearing, and the steel gangplank is fixed by taking the space of the support cross-section as a standard and is fully paved and fixed; and after the bottom layer construction platform is laid, accurately marking the installation position line of the longitudinal distribution beam on the transverse connection of the support according to a design drawing.
Step 2: installing a longitudinal distribution beam according to the installation position line, wherein the selection standard of the longitudinal distribution beam is to select the section size of the profile according to the load condition of the steel box beam, ensure the construction operation space and select H-shaped steel with proper height; then lofting and marking a bridge pier transverse axis on the longitudinal distribution beam, and then paying out a position line of the transverse distribution beam on the longitudinal distribution beam by taking the bridge pier transverse axis as a reference; deviation is controlled within 5mm, and the local deformation of the bottom surface of the steel box girder caused by overlarge supporting position is prevented.
And step 3: and installing the transverse distribution beam according to the position line of the transverse distribution beam, and controlling the elevation of the transverse distribution beam, wherein the deviation between the required elevation and the designed elevation is less than or equal to 20 mm.
The arrangement of the transverse distribution beams determines the control precision of the integral line shape of the bridge, H-shaped steel with the section rigidity meeting the local supporting load is selected, and a stiffening plate is added between flanges of the H-shaped steel for reinforcement when necessary. The flanges of the transverse distribution beam and the longitudinal distribution beam are connected by fillet welding, and an upper layer frame structure and a lower layer frame structure are integrally formed; meanwhile, the limiting blocks are arranged at the positions with the slopes of the bottom plate units of the steel box girders and fixed on the longitudinal distribution girders for fixing the transverse distribution girders, so that the steel box girder constant-load impact-resistant construction method is high in stability and has the capacity of resisting temporary load and impact load in the constant-load and construction processes of the steel box girders. And after the transverse distribution beam is installed, arranging installation position lines of the elevation cushion blocks according to the central axis of the longitudinal distribution beam and the blocking condition of the steel box beam bottom plate unit.
And 4, step 4: the upper construction platform is arranged outside the two ends of the transverse distribution beam and communicated with the bottom construction platform, and the safety guardrail is arranged outside the upper construction platform, so that the practicability and the safety are guaranteed.
And 5: and calculating the height difference of each supporting point according to the designed elevation value of the steel box girder, sequentially determining the height of each elevation cushion block, welding the elevation cushion blocks at the flanges of the transverse distribution girder according to the installation position lines of the elevation cushion blocks, and respectively locating the longitudinal arrangement of the elevation cushion blocks at the positions of the joints and the middle parts of the bottom plate units of the steel box girder by taking the central axis of the longitudinal distribution girder as a reference.
And (3) accurately leveling by using a level gauge, wherein the height of the elevation cushion block is 150 +/-20 mm, and the deviation value of the elevation cushion block and the designed elevation is less than or equal to 5 mm.
Step 6: the central axis of the transverse distribution beam is used as a reference, the two ends of each steel box girder bottom plate are provided with positioning check blocks, the positioning check blocks are fixed at the two ends of the transverse distribution beam and used for controlling the width of the steel box girder bottom plate, the inner end face of each positioning check block is vertically provided with a detection line of a steel box girder transverse base line, and the detection line is arranged by taking the central axis of the transverse distribution beam as the reference.
And 7: after the jig frame is manufactured, the jig frame is used as a box girder structure cover tire and a supporting system, the position of a central bottom plate unit is determined by taking a detection line of a steel box girder transverse base line on the jig frame, the central axis of a longitudinal distribution beam and the central axis of a transverse distribution beam as references, other bottom plate units are sequentially installed, after the bottom plates are welded, a web plate, a partition plate and a top plate unit are installed after measurement and adjustment are completed, and finally manufacturing and installation of a girder section are completed.
The utility model has strong practicability, simple manufacture and high efficiency, can effectively ensure the safe manufacture of the high-altitude general spliced steel box girder, simultaneously ensures the quality and efficiency of manufacture and ensures the shape of a bridge.
The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, numerous simple deductions or substitutions may be made without departing from the spirit of the utility model, which shall be deemed to belong to the scope of the utility model.
Claims (6)
1. The steel box girder assembling jig frame is characterized by comprising a base, wherein a longitudinal distribution girder is horizontally fixed at the top end of the base, the longitudinal distribution girder is symmetrically arranged by taking a longitudinal axis of a bridge as a reference, and the central axis of the longitudinal distribution girder in the middle of the longitudinal distribution girder is superposed with the longitudinal axis of the bridge; the top end of the longitudinal distribution beam is horizontally fixed with a transverse distribution beam, the transverse distribution beam is symmetrically arranged by taking the transverse axis of a pier as a reference, the central axis of the transverse distribution beam in the middle of the transverse distribution beam is superposed with the transverse axis of the pier, two ends of the transverse distribution beam are vertically fixed with positioning stop blocks, the width of a bottom plate of the steel box girder is controlled by the positioning stop blocks, a detection line of a transverse base line of the steel box girder is vertically arranged on the inner end surface of each positioning stop block, and the detection line is arranged by taking the central axis of the transverse distribution beam as a reference; and determining the position of the central bottom plate unit of the steel box girder by taking the detection line of the steel box girder transverse base line, the central axis of the longitudinal distribution girder and the central axis of the transverse distribution girder as references, and taking the detection line of the steel box girder transverse base line, the central axis of the longitudinal distribution girder and the central axis of the transverse distribution girder as the assembly references of the steel box girder.
2. The steel box girder splicing jig of claim 1, wherein elevation pads are provided on the transverse distribution girder, and the elevation pads are symmetrically arranged with reference to a central axis of the longitudinal distribution girder.
3. The steel box girder assembling jig of claim 2, wherein the elevation cushion blocks are arranged according to positions of the steel box girder bottom plate component units, and at least three rows are arranged below each component unit and are respectively positioned at a butt joint position and a middle position of each component unit.
4. The steel box girder assembling jig frame as claimed in claim 1, 2 or 3, wherein the longitudinal distribution girders are fixed with limit blocks respectively abutting against one side of the transverse distribution girders.
5. The steel box girder assembling jig frame as claimed in claim 4, wherein the base comprises a bracket and a cross beam, and the cross beam is fixed to the top end of the bracket along the direction of the transverse axis of a pier; the longitudinal distribution beam is fixed at the top end of the cross beam, and a steel plate is horizontally fixed between the lower ends of the cross beams to form a bottom layer construction platform.
6. The steel box girder assembling jig frame as claimed in claim 5, wherein an upper construction platform is fixed to the outer sides of both ends of the transverse distribution girder, and a safety fence is disposed on the outer side of the upper construction platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123376438.4U CN216615527U (en) | 2021-12-29 | 2021-12-29 | Bed-jig is assembled to steel case roof beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123376438.4U CN216615527U (en) | 2021-12-29 | 2021-12-29 | Bed-jig is assembled to steel case roof beam |
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| Publication Number | Publication Date |
|---|---|
| CN216615527U true CN216615527U (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123376438.4U Active CN216615527U (en) | 2021-12-29 | 2021-12-29 | Bed-jig is assembled to steel case roof beam |
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| CN (1) | CN216615527U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117328369A (en) * | 2023-11-30 | 2024-01-02 | 北京建工集团有限责任公司 | Mounting method of combined box girder |
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2021
- 2021-12-29 CN CN202123376438.4U patent/CN216615527U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117328369A (en) * | 2023-11-30 | 2024-01-02 | 北京建工集团有限责任公司 | Mounting method of combined box girder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230703 Address after: 721006 No.80 Qingjiang Road, Weibin District, Baoji City, Shaanxi Province Patentee after: CHINA RAILWAY BAOJI BRIDGE GROUP Co.,Ltd. Patentee after: China Railway Baoqiao (Zhoushan) Co.,Ltd. Address before: 721006 No.80 Qingjiang Road, Weibin District, Baoji City, Shaanxi Province Patentee before: CHINA RAILWAY BAOJI BRIDGE GROUP Co.,Ltd. |
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| TR01 | Transfer of patent right |