CN215366758U - Steel box girder top pushes away nose girder and steel box girder root connection structure - Google Patents
Steel box girder top pushes away nose girder and steel box girder root connection structure Download PDFInfo
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- CN215366758U CN215366758U CN202121497007.0U CN202121497007U CN215366758U CN 215366758 U CN215366758 U CN 215366758U CN 202121497007 U CN202121497007 U CN 202121497007U CN 215366758 U CN215366758 U CN 215366758U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 81
- 239000010959 steel Substances 0.000 title claims abstract description 81
- 238000009795 derivation Methods 0.000 claims abstract description 26
- 238000003466 welding Methods 0.000 claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 7
- 238000005192 partition Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 8
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model discloses a connecting structure of a steel box girder pushing guide beam and the root part of a steel box girder, which comprises: the box-type connecting mechanism is characterized in that the right end of the box-type connecting mechanism is fixedly connected with a first arc derivation beam frame through bolts, the right end of the first arc derivation beam frame is fixedly connected with a second arc derivation beam frame through bolts, and the right end of the second arc derivation beam frame is fixedly connected with a third arc derivation beam frame through bolts. When the connecting mechanism is connected with a steel box girder of a bridge with small curvature radius, the first welding web plate and the second welding web plate are in butt welding with a longitudinal partition plate at the connecting end of the steel box girder and externally attached to a welding reinforcing plate, the lower wing plate is abutted to the lower surface of the lower bottom plate of the steel box girder, and the rectangular upper wing plate clamps the upper surface of the steel box girder by screwing the screw rod through the turntable, so that the firm connection between the box-type connecting mechanism and the end part of the steel box girder is realized, the connecting strength is high, and the fracture at the connecting part of the box-type connecting mechanism and the steel box girder can be effectively prevented.
Description
Technical Field
The utility model belongs to the technical field of derivation beams, and particularly relates to a connecting structure of a steel box beam pushing guide beam and the root of the steel box beam.
Background
In recent years, with the acceleration of the construction process of infrastructure in China, the construction of overpasses and highways leads to the development of complex and diversified urban traffic. At present, some bridges with smaller flat curve radius are usually constructed by hoisting. However, when a ramp or a main bridge crosses an existing road structure, the hoisting construction may adversely affect traffic. Therefore, a pushing guide beam is needed for pushing construction.
At present, when a bridge with a small curvature radius spans an existing highway structure, a pushing guide beam is mostly adopted for pushing construction.
However, when the pushing construction is performed on a bridge with a small curvature radius, the steel box girder is complex to twist, the angular velocity is the same and the linear velocity is different in the pushing process, so that the control of the pushing process is more difficult compared with the traditional linear pushing and large-curve pushing, the shearing force borne by the pushing guide girder is larger, and the joint of the pushing guide girder and the steel box girder is easy to break, thereby causing safety accidents.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a connecting structure of a steel box girder pushing guide beam and the root of the steel box girder, and aims to solve the technical problems that when the pushing guide beam is used for pushing a bridge with a small curvature radius, the shearing force borne by the pushing guide beam is larger, and the connecting part of the pushing guide beam and the steel box girder is easy to break.
The technical scheme for solving the technical problems is as follows: the utility model provides a top pushes away nose girder and steel box girder root connection structure, it includes box coupling mechanism, box coupling mechanism right-hand member deduces the roof beam structure through the first arc of bolt fixedly connected with, and the roof beam structure is deduced through bolt fixedly connected with second arc to first arc deduction roof beam structure right-hand member, and the roof beam structure is deduced through bolt fixedly connected with third arc to second arc deduction roof beam structure right-hand member.
Box coupling mechanism includes box longeron, box longeron left side middle part fixedly connected with is the first welding web of a row of equidistance range, and box end frame of both ends symmetry fixedly connected with around the box longeron, box longeron and box end frame all adopt the steel preparation to form, and all set up to hollow structure in box longeron and the box end frame, box end frame lower surface left end fixedly connected with horizontally lower pterygoid lamina, and box end frame left surface middle part fixedly connected with is the second welding web of a row of equidistance range, the left end of second welding web and first welding web is located through the plane, box end frame upper surface left end is equipped with foldable upper wing plate subassembly.
The utility model adopts the structure for connecting the steel box girder pushing guide beam and the steel box girder root, and further comprises the following steps: the foldable last wing plate subassembly includes the movable rod, movable rod one end is rotated and is connected with first hinge seat, and first hinge seat is fixed in box end frame upper surface left side, the lower fixed surface of the movable rod other end is connected with the rectangle and goes up the pterygoid lamina, the fixed second hinge seat that is equipped with in movable rod upper surface middle part, and movable rod upper surface middle part rotates through second hinge seat and is connected with the connecting rod, the one end fixedly connected with rotation sleeve of second hinge seat is kept away from to the connecting rod, rotates the one end that the connecting rod was kept away from to the sleeve and rotates and be connected with the lead screw, and the lead screw keeps away from and rotate telescopic one end fixedly connected with carousel, lead screw outside surface cover is equipped with the internal thread sleeve pipe, and the internal thread sleeve pipe downside rotates and is connected with the pole setting, the pole setting lower extreme is fixed in box end frame upper surface right side.
The utility model adopts the structure for connecting the steel box girder pushing guide beam and the steel box girder root, and further comprises the following steps: the middle parts of the front side and the rear side of the internal thread sleeve are symmetrically and fixedly connected with rotating shafts, the middle part of the upper end of the vertical rod is provided with a groove, and the outer ends of the front rotating shaft and the rear rotating shaft are respectively connected with the front side wall and the rear side wall in the groove in a rotating mode.
The utility model adopts the structure for connecting the steel box girder pushing guide beam and the steel box girder root, and further comprises the following steps: the lower ends of the left side and the right side of the upright rod are symmetrically and fixedly connected with reinforcing aids, and the reinforcing aids are fixedly connected with the box-type end frame.
The utility model adopts the structure for connecting the steel box girder pushing guide beam and the steel box girder root, and further comprises the following steps: the first arc derivation beam frame comprises a first truss longitudinal beam, the front end and the rear end of the first truss longitudinal beam are fixedly connected with a first arc truss cross beam and a second arc truss cross beam respectively, the left ends of the first arc truss cross beam and the second arc truss cross beam are fixedly connected with connecting plates, and the right ends of the front side and the rear side of the first arc truss cross beam and the second arc truss cross beam are fixedly connected with first connecting sleeves.
The utility model adopts the structure for connecting the steel box girder pushing guide beam and the steel box girder root, and further comprises the following steps: and the connecting plate is correspondingly provided with a mounting hole with the bolt and is fixedly connected with the right side surface of the box-type end frame through the bolt.
The utility model adopts the structure for connecting the steel box girder pushing guide beam and the steel box girder root, and further comprises the following steps: the second arc derivation beam frame comprises a second truss longitudinal beam, the front two ends of the second truss longitudinal beam are fixedly connected with a third arc truss cross beam and a fourth arc truss cross beam respectively, and the left and right ends of the front side and the rear side of the third arc truss cross beam and the fourth arc truss cross beam are fixedly connected with second connecting sleeves.
The utility model adopts the structure for connecting the steel box girder pushing guide beam and the steel box girder root, and further comprises the following steps: and the second connecting sleeve is internally sleeved with a bolt and is fixedly connected with the first connecting sleeve on the first arc derivation beam frame through the bolt.
The utility model adopts the structure for connecting the steel box girder pushing guide beam and the steel box girder root, and further comprises the following steps: the third arc derivation beam frame comprises a third truss longitudinal beam, a fifth arc truss cross beam and a sixth arc truss cross beam are fixedly connected to the front end and the rear end of the third truss longitudinal beam respectively, and third connecting sleeves are fixedly connected to the left ends of the front side and the rear side of the fifth arc truss cross beam and the left ends of the rear side of the sixth arc truss cross beam.
The utility model adopts the structure for connecting the steel box girder pushing guide beam and the steel box girder root, and further comprises the following steps: and the third connecting sleeve is fixedly connected with the second connecting sleeve at the right end of the second arc derivation beam frame through the bolt.
The utility model has the beneficial effects that:
1. when the connecting structure is connected with a steel box girder of a bridge with small curvature radius, the first welding web plate and the second welding web plate are in butt welding with the longitudinal partition plate at the connecting end of the steel box girder and externally attached to the welding reinforcing plate, the lower wing plate is abutted to the lower surface of the lower bottom plate of the steel box girder, and the rectangular upper wing plate clamps the upper surface of the steel box girder by screwing the screw rod through the turntable, so that the firm connection between the box-type connecting mechanism and the end part of the steel box girder is realized, the connecting strength is high, the fracture at the connecting part of the box-type connecting mechanism and the steel box girder can be effectively prevented, and the safety of the structure is greatly improved.
2. The radian of the first arc derivation beam frame, the second arc derivation beam frame and the third arc derivation beam frame are matched with the radian of the steel box beam of the bridge with small curvature radius, so that the situation that the control of the incremental launching process is more difficult than the traditional straight-line incremental launching and large-curve incremental launching due to the fact that the angular velocity is the same and the linear velocity is different in the incremental launching construction process of the steel box beam can be avoided, the possibility that the steel box beam of the bridge with small curvature radius deviates in the incremental launching process is greatly reduced, and the practicability of the structure is greatly improved.
Drawings
The above and/or other advantages of the utility model will become more apparent and more readily appreciated from the following detailed description taken in conjunction with the accompanying drawings, which are given by way of illustration only and not by way of limitation, and in which:
FIG. 1 is a schematic top view of a connection structure of a steel box girder pushing guide beam and a steel box girder root;
FIG. 2 is a front view structural schematic diagram of a connection structure of a steel box girder pushing guide beam and the root of the steel box girder;
FIG. 3 is a schematic top view of a box coupling mechanism according to an embodiment of the present invention;
FIG. 4 is a front view of the box connection mechanism according to one embodiment of the present invention;
FIG. 5 is a schematic top view of a first arcuate thrust beam of one embodiment of the present invention;
FIG. 6 is a schematic top view of a second arcuate-shaped derivative beam of one embodiment of the present invention;
fig. 7 is a top view of a third arcuate-shaped derivative beam of an embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a box-type connecting mechanism; 11. a box-type longitudinal beam; 12. a first weld web; 13. a box-type end frame; 14. a lower wing plate; 15. a second weld web; 16. a foldable upper wing plate assembly; 1601. a movable rod; 1602. a first hinge base; 1603. a rectangular upper wing plate; 1604. a second hinge base; 1605. a connecting rod; 1606. rotating the sleeve; 1607. a screw rod; 1608. a turntable; 1609. an internally threaded sleeve; 1610. a rotating shaft; 1611. erecting a rod; 1612. strengthening and assisting; 2. a first arcuate thrust beam mount; 21. a first truss stringer; 22. a first arc truss beam; 23. a second arc truss beam; 24. a connecting plate; 25. a first connecting sleeve; 3. a second arcuate thrust beam mount; 31. a second truss stringer; 32. a third arc truss beam; 33. a fourth arc truss beam; 34. a second connecting sleeve; 4. a third arc-shaped derivation beam frame; 41. a third truss stringer; 42. a fifth arc truss beam; 43. a sixth arc truss beam; 44. and a third connecting sleeve.
Detailed Description
Hereinafter, an embodiment of the steel box girder jacking pilot girder and steel box girder root connection structure of the present invention will be described with reference to the accompanying drawings.
The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the utility model. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structures of the various elements of the embodiments of the utility model. Like reference numerals are used to denote like parts.
Fig. 1 to 7 show a connection structure of a steel box girder pushing pilot girder and a steel box girder root according to an embodiment of the present invention, which includes: box coupling mechanism 1, roof beam structure 2 is derived through the first arc of bolt fixedly connected with to 1 right-hand member of box coupling mechanism, and roof beam structure 3 is derived through bolt fixedly connected with second arc to the 2 right-hand members of first arc derivation roof beam structure, and roof beam structure 4 is derived through the third arc of bolt fixedly connected with to the 3 right-hand members of second arc derivation roof beam structure.
The foldable upper wing plate component 16 comprises a movable rod 1601, one end of the movable rod 1601 is rotatably connected with a first hinge seat 1602, the first hinge seat 1602 is fixed on the left side of the upper surface of the box-type end frame 13, the lower surface of the other end of the movable rod 1601 is fixedly connected with a rectangular upper wing plate 1603, the middle part of the upper surface of the movable rod 1601 is fixedly provided with a second hinge seat 1604, the middle part of the upper surface of the movable rod 1601 is rotatably connected with a connecting rod 1605 through the second hinge seat 1604, one end of the connecting rod 1605, which is far away from the second hinge seat 1604, is fixedly connected with a rotating sleeve 1606, one end of the rotating sleeve 1606, which is far away from the connecting rod 1605, is rotatably connected with a lead screw 1607, one end of the lead screw 1607, which is far away from the rotating sleeve 1606, an internal thread sleeve 1609 is sleeved on the outer surface of the lead screw 1607, and a vertical rod 1611 is rotatably connected with the lower side of the internal thread sleeve 1609, specifically, the middle parts of the front and back sides of the internal thread sleeve 1609 are symmetrically and fixedly connected with a rotating shaft 1610, the recess has been seted up at pole setting 1611 upper end middle part, and the outer end of two pivot 1610 around just rotates with both sides wall around in the recess respectively and is connected, pole setting 1611 lower extreme is fixed in box end frame 13 upper surface right side, pole setting 1611 left and right sides lower extreme symmetry fixedly connected with strengthens helping 1612, and strengthens helping 1612 lower extreme and box end frame 13 fixed connection, helps the setting of 1612 through strengthening, can increase pole setting 1611 and box end frame 13 joint strength.
First arc is derived roof beam structure 2 and is included first truss longeron 21, both ends are first arc truss crossbeam 22 and second arc truss crossbeam 23 of fixedly connected with respectively around first truss longeron 21, the equal fixedly connected with connecting plate 24 in first arc truss crossbeam 22 and the 23 left ends of second arc truss crossbeam, it is concrete, correspond with the bolt on the connecting plate 24 and seted up the mounting hole, and connecting plate 24 passes through bolt and 13 right flank fixed connection of box end frame, the equal fixedly connected with first connecting sleeve 25 of both sides right-hand member around first arc truss crossbeam 22, the second arc truss crossbeam 23.
The second arc deduces roof beam structure 3 and includes second truss longeron 31, second truss longeron 31 front end both ends difference fixedly connected with third arc truss crossbeam 32 and fourth arc truss crossbeam 33, and the equal fixedly connected with second adapter sleeve 34 in both ends about both sides around third arc truss crossbeam 32, fourth arc truss crossbeam 33, specific, the left end the second adapter sleeve 34 endotheca is equipped with the bolt, and the first adapter sleeve 25 fixed connection on second adapter sleeve 34 deduces the roof beam structure 2 through bolt and first arc.
Third arc is derived roof beam structure 4 and is included third truss longeron 41, both ends are fixedly connected with fifth arc truss crossbeam 42 and sixth arc truss crossbeam 43 respectively around third truss longeron 41, the equal fixedly connected with third adapter sleeve 44 in both sides left end around fifth arc truss crossbeam 42, the sixth arc truss crossbeam 43, it is concrete, the inboard cover of third adapter sleeve 44 is equipped with the bolt, and third adapter sleeve 44 derives the second adapter sleeve 34 fixed connection of roof beam structure 3 right-hand member through bolt and second arc.
The working principle is as follows:
when the utility model is connected with a steel box girder of a bridge with small curvature radius, a first welding web plate 12 and a second welding web plate 15 are butt-welded with a longitudinal clapboard at the connecting end of the steel box girder and externally attached with a welding reinforcing plate (a gap between the first welding web plate 12 and the second welding web plate 15 can facilitate welding operation of workers), a lower wing plate 14 is abutted against the lower surface of a lower bottom plate of the steel box girder, a screw rod 1607 is screwed up through a turntable 1608, so that a rectangular upper wing plate 1603 clamps the upper surface of the steel box girder (the concrete process is that the screw rod 1607 is driven to rotate forwards through the turntable 1608, the clockwise rotating screw rod 1607 moves towards the steel box girder under the transmission action of a thread structure of an inner thread sleeve 1609, the moving screw rod 1607 drives a movable rod 1601 to move towards the upper surface of the steel box girder under the coordination of a rotating sleeve 1606, a connecting rod 1605, a second hinge seat 1604 and a first hinge seat 1602, until the rectangular upper wing plate 1603 clamps the upper surface of the steel box girder), thereby realize the firm connection of box coupling mechanism 1 and steel box girder tip, and joint strength is big, can effectively prevent the junction fracture of box coupling mechanism 1 and steel box girder, has improved the security of this structure greatly.
The radians of the first arc derivation beam frame 2, the second arc derivation beam frame 3 and the third arc derivation beam frame 4 are all matched with the radian of the steel box girder of the bridge with small curvature radius, so that the situation that the control of the incremental launching process is more difficult compared with the traditional straight line incremental launching and large curve incremental launching due to the fact that the angular velocities are the same and the linear velocities are different in the incremental launching construction process of the steel box girder can be avoided, the possibility that the steel box girder of the bridge with small curvature radius deviates in the incremental launching process is greatly reduced, and the practicability of the structure is greatly improved.
The technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the utility model, so as to achieve the purpose of the utility model.
Claims (10)
1. The utility model provides a steel box girder top pushes away nose girder and steel box girder root connection structure which characterized in that includes: the right end of the box type connecting mechanism (1) is fixedly connected with a first arc-shaped derivation beam frame (2) through bolts, the right end of the first arc-shaped derivation beam frame (2) is fixedly connected with a second arc-shaped derivation beam frame (3) through bolts, and the right end of the second arc-shaped derivation beam frame (3) is fixedly connected with a third arc-shaped derivation beam frame (4) through bolts;
the box-type connecting mechanism (1) comprises a box-type longitudinal beam (11), the middle part of the left side of the box-type longitudinal beam (11) is fixedly connected with a row of first welding web plates (12) which are arranged at equal intervals, and the front end and the rear end of the box-type longitudinal beam (11) are symmetrically and fixedly connected with box-type end frames (13), the box-type longitudinal beams (11) and the box-type end frames (13) are both made of steel, and the box-type longitudinal beams (11) and the box-type end frames (13) are both provided with hollow structures, the left end of the lower surface of the box-type end frame (13) is fixedly connected with a horizontal lower wing plate (14), and the middle part of the left side surface of the box-type end frame (13) is fixedly connected with a row of second welding web plates (15) which are arranged at equal intervals, the left ends of the second welding web (15) and the first welding web (12) are positioned on a passing plane, and a folding upper wing plate component (16) is arranged at the left end of the upper surface of the box-type end frame (13).
2. The structure for connecting the top guide beam and the root of the steel box girder according to claim 1, wherein the foldable upper wing plate assembly (16) comprises a movable rod (1601), one end of the movable rod (1601) is rotatably connected with a first hinge seat (1602), the first hinge seat (1602) is fixed on the left side of the upper surface of the box-type end frame (13), the lower surface of the other end of the movable rod (1601) is fixedly connected with a rectangular upper wing plate (1603), the middle part of the upper surface of the movable rod (1601) is fixedly provided with a second hinge seat (1604), the middle part of the upper surface of the movable rod (1601) is rotatably connected with a connecting rod (1605) through the second hinge seat (1604), one end of the connecting rod (1605) far away from the second hinge seat (1604) is fixedly connected with a rotating sleeve (1606), one end of the rotating sleeve (1606) far away from the connecting rod (1605) is rotatably connected with a lead screw (1607), and lead screw (1607) keep away from one end fixedly connected with carousel (1608) of rotating sleeve (1606), lead screw (1607) outside surface cover is equipped with internal thread sleeve pipe (1609), and internal thread sleeve pipe (1609) downside rotates and is connected with pole setting (1611), pole setting (1611) lower extreme is fixed in box end frame (13) upper surface right side.
3. The structure for connecting the top pushing guide beam and the root of the steel box girder according to claim 2, wherein the middle parts of the front and rear sides of the internal thread bushing (1609) are symmetrically and fixedly connected with a rotating shaft (1610), the middle part of the upper end of the upright rod (1611) is provided with a groove, and the outer ends of the front and rear rotating shafts (1610) are respectively rotatably connected with the front and rear side walls in the groove.
4. The structure for connecting the top push pilot beam and the root of the steel box girder as claimed in claim 2, wherein the lower ends of the left and right sides of the vertical rod (1611) are symmetrically and fixedly connected with the reinforcing aid (1612), and the lower ends of the reinforcing aid (1612) are fixedly connected with the box-type end frame (13).
5. The structure for connecting the pushing guide beam and the root of the steel box girder according to claim 1, wherein the first arc-shaped pushing beam frame (2) comprises a first truss longitudinal beam (21), the front end and the rear end of the first truss longitudinal beam (21) are respectively fixedly connected with a first arc-shaped truss cross beam (22) and a second arc-shaped truss cross beam (23), the left ends of the first arc-shaped truss cross beam (22) and the second arc-shaped truss cross beam (23) are respectively fixedly connected with a connecting plate (24), and the right ends of the front side and the rear side of the first arc-shaped truss cross beam (22) and the second arc-shaped truss cross beam (23) are respectively fixedly connected with a first connecting sleeve (25).
6. The structure for connecting the top push pilot beam and the root of the steel box girder according to claim 5, wherein the connecting plate (24) is provided with mounting holes corresponding to the bolts, and the connecting plate (24) is fixedly connected with the right side surface of the box-type end frame (13) through the bolts.
7. The structure for connecting the pushing guide beam and the root of the steel box girder according to claim 1, wherein the second arc-shaped pushing beam frame (3) comprises a second truss longitudinal beam (31), the front ends of the second truss longitudinal beam (31) are fixedly connected with a third arc-shaped truss cross beam (32) and a fourth arc-shaped truss cross beam (33) respectively, and the left and right ends of the front and back sides of the third arc-shaped truss cross beam (32) and the fourth arc-shaped truss cross beam (33) are fixedly connected with a second connecting sleeve (34).
8. The structure for connecting the top push pilot beam and the root of the steel box girder according to claim 7, wherein the second connecting sleeve (34) at the left end is sleeved with a bolt, and the second connecting sleeve (34) is fixedly connected with the first connecting sleeve (25) on the first arc-shaped derivation beam frame (2) through the bolt.
9. The structure for connecting the pushing guide beam and the root of the steel box girder according to claim 1, wherein the third arc-shaped pushing beam frame (4) comprises a third truss longitudinal beam (41), a fifth arc-shaped truss transverse beam (42) and a sixth arc-shaped truss transverse beam (43) are fixedly connected to the front end and the rear end of the third truss longitudinal beam (41), respectively, and third connecting sleeves (44) are fixedly connected to the left ends of the front side and the rear side of the fifth arc-shaped truss transverse beam (42) and the left end of the sixth arc-shaped truss transverse beam (43).
10. The structure for connecting the top push guide beam and the root of the steel box girder as claimed in claim 9, wherein the third connecting sleeve (44) is sleeved with a bolt, and the third connecting sleeve (44) is fixedly connected with the second connecting sleeve (34) at the right end of the second arc-shaped push beam frame (3) through the bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121497007.0U CN215366758U (en) | 2021-07-02 | 2021-07-02 | Steel box girder top pushes away nose girder and steel box girder root connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121497007.0U CN215366758U (en) | 2021-07-02 | 2021-07-02 | Steel box girder top pushes away nose girder and steel box girder root connection structure |
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| CN215366758U true CN215366758U (en) | 2021-12-31 |
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| CN202121497007.0U Active CN215366758U (en) | 2021-07-02 | 2021-07-02 | Steel box girder top pushes away nose girder and steel box girder root connection structure |
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| CN (1) | CN215366758U (en) |
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- 2021-07-02 CN CN202121497007.0U patent/CN215366758U/en active Active
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