CN120081293A - A bridge crane and construction method for closing the middle span of a steel box girder - Google Patents
A bridge crane and construction method for closing the middle span of a steel box girder Download PDFInfo
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- CN120081293A CN120081293A CN202510569893.XA CN202510569893A CN120081293A CN 120081293 A CN120081293 A CN 120081293A CN 202510569893 A CN202510569893 A CN 202510569893A CN 120081293 A CN120081293 A CN 120081293A
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- closure
- cross beam
- steel box
- box girder
- plate
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/06—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
- B66C1/66—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
- B66C15/04—Safety gear for preventing collisions, e.g. between cranes or trolleys operating on the same track
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C19/00—Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a bridge deck crane for closure of a middle span of a steel box girder and a construction method, and relates to the technical field of bridge construction. The bridge deck crane for the closure of the middle span of the steel box girder comprises a supporting module, a lifting module and an adjusting module, wherein the adjusting module comprises a first cross beam and a second cross beam, and the second cross beam is detachably connected with the closure girder segment. The outer rotating end of the side supporting beam can be screwed out and pressed on the fixed beam section so as to support the closure beam section, and the inner rotating end can be screwed out and pulled with the lower surface of the first beam. The stability of the closure beam section is improved by utilizing the friction force between the side supporting cross beam and the fixed beam section, the problem of difficult installation of the first code plate caused by shaking of the closure beam section is avoided, and meanwhile, the top surface of the closure beam section and the top surface of the fixed beam section are ensured to be aligned so as to facilitate the later permanent fixed connection. The inclined supporting arm, the abutting hydraulic cylinder, the second cross beam and the side supporting cross beam form a stable triangular supporting structure, and the side supporting cross beam is prevented from being bent under pressure.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a bridge deck crane for closure of a steel box girder midspan and a construction method.
Background
Cable-stayed bridges are one of the usual bridges, often used for cross-sea and cross-river roads. In the construction process of the cable-stayed bridge, the standard beam sections are adopted to push the construction from two ends to the middle direction, and finally, the closure beam sections with proper lengths are cut for filling installation according to the sizes of the remaining gaps. After the standard beam section is fixedly installed, the fixed beam section is obtained.
During construction, the closure beam section is suspended in the notch in a hoisting mode, and then the closure beam section and the fixed beam section are temporarily connected by using the code plates, but the closure beam section in a suspended state is often swayed (influenced by wind force and vibration, for example), namely the closure beam section and the fixed beam section are displaced and cannot be temporarily fixed, so that the welding and the installation of the first code plate are very difficult.
Disclosure of Invention
In order to solve the problem that welding and installing of a first code plate are very difficult in the closure process in the background technology, the invention provides a bridge deck crane for closure of a steel box girder midspan and a construction method.
The technical scheme adopted by the invention for solving the technical problems is as follows:
The bridge deck crane comprises a supporting module, a lifting module and an adjusting module, wherein the supporting module is fixedly connected to a fixed beam section in a pressing mode, the lifting module is connected with the supporting module, the adjusting module is connected with the lifting module, the adjusting module comprises a first cross beam and two second cross beams which are arranged in an I shape, the middle of each second cross beam is arranged below the end portion of the first cross beam, a lower extension plate is arranged on the lower bottom surface of each second cross beam, the lower extension plate is detachably connected with a lifting lug plate on the top surface of the corresponding closure beam section, a hanging gap is arranged between each second cross beam and the corresponding closure beam section, a side supporting cross beam is rotatably connected with the corresponding second cross beam in the hanging gap, the outer rotating end of each side supporting cross beam can be screwed out of the hanging gap and is pressed on the corresponding fixed beam section, so that the corresponding closure beam section and the inner rotating end of each side supporting cross beam can be screwed out of the hanging gap and are pulled on the lower surface of the corresponding first cross beam, a triangular supporting cross beam is formed by the outer rotating end, and the corresponding side supporting cross beam can be screwed out of the corresponding inclined supporting arm upwards and is in the corresponding second inclined supporting cross beam.
As a further optimization scheme of the invention, the end part inner cavity of the diagonal brace arm, which is close to the second cross beam, is provided with an abutting hydraulic cylinder, and an output shaft of the abutting hydraulic cylinder can extend out of the diagonal brace arm inner cavity to be clamped with an abutting inclined hole of the side wall of the second cross beam.
As a further optimization scheme of the invention, the end part of the diagonal brace arm, which is far away from the second cross beam, is provided with a downward extension bulge, and the downward extension bulge is used for crimping the fixed beam section so as to compensate the gap between the side brace cross beam and the fixed beam section.
As a further optimization scheme of the invention, the side support cross beam is provided with a containing cavity with an opening on the top surface and used for containing the diagonal brace arm, a lifting hydraulic cylinder is arranged in the containing cavity, the bottom end of the lifting hydraulic cylinder is hinged with the side support cross beam, and the top end of the lifting hydraulic cylinder is hinged with the middle part of the diagonal brace arm.
As a further optimization scheme of the invention, the bottom surface of the first cross beam is provided with a lower extension vertical plate, the middle lower part of the lower extension vertical plate is provided with a pull-connection assembly, and the pull-connection assembly can be used for upwards pulling and connecting the inner rotating end so as to prevent the closure beam section from sinking.
As a further optimization scheme of the invention, the pull-connecting assembly comprises two L-shaped pull-connecting claws, a transverse clamping groove is arranged between the pull-connecting claws and the lower extending vertical plate, and openings of the two transverse clamping grooves respectively point to two sides of the lower extending vertical plate so as to be in fit engagement with the inner rotating end from two sides.
As a further optimization scheme of the invention, the inner cavity of one inner rotation end is provided with the limiting oil cylinder, and the output shaft of the limiting oil cylinder can extend out from the end surface of the inner rotation end and is inserted into the limiting hole of the end surface of the other inner rotation end, so that the two side support beams are kept coaxial and are prevented from falling out of the transverse clamping groove.
As a further optimization scheme of the invention, the bottom surface of the inner rotation end is provided with a bottom cambered surface, the pull-connecting claw comprises a vertical plate and a bottom plate which are connected in an L shape, and the upper surface of the bottom plate is provided with a fitting cambered surface which is matched with the bottom cambered surface and a transverse clamping plane which is tangential with the fitting cambered surface.
As a further optimization scheme of the invention, one end of the attaching cambered surface, which is far away from the transverse clamping plane, is provided with an extending cambered surface, and one end of the transverse clamping plane, which is far away from the attaching cambered surface, is provided with an extending plane for adapting to an inner rotation end which is clamped in an inclined manner.
A construction method for a steel box girder midspan closure comprises the steps of S1, connecting a lower extension plate with a lifting lug plate, S2, hoisting, transversely moving and rotating a closure girder segment under the condition that an outer rotating end and an inner rotating end are both arranged in a hanging gap, S7, temporarily connecting the closure girder segment with the fixing girder segment by adopting a stacking plate, S3, rotating a side support cross beam to be perpendicular to a second cross beam, and clamping the inner rotating end into a pull-connecting assembly, S4, enabling an output shaft of a limiting oil cylinder to extend out of and be inserted into the limiting hole, S5, lowering the closure girder segment into the notch until the triangular support structure is in pressure connection with the fixing girder segment, S6, temporarily connecting the closure girder segment with the fixing girder segment by adopting a stacking plate, S7, connecting the closure girder segment with the fixing girder segment in a pressing manner, and then disconnecting the closure girder segment from the lifting lug plate, and permanently disconnecting the closure girder segment from the lifting lug plate.
In summary, the present invention has at least one of the following advantages:
(1) The invention has simple structure and reliable function, the side support cross beam can be laterally screwed out and pressed on the fixed beam section, the stability of the closure beam section is improved by utilizing the friction force between the side support cross beam and the fixed beam section, the problem of difficult installation of a first code plate caused by shaking of the closure beam section is avoided, and the top surface of the closure beam section and the top surface of the fixed beam section are simultaneously ensured to be aligned so as to facilitate the permanent fixed connection in the later period.
(2) Friction between the side bracing crossbeam and the fixed beam section can play a limiting role on the Long Liang section, and the number requirement on the code plates is less, so that the time for welding and dismounting the code plates is reduced, the working steps are simplified, and the construction efficiency is improved.
(3) The inclined supporting arm, the abutting hydraulic cylinder, the second cross beam and the side supporting cross beam form a stable triangular supporting structure, so that the bearing capacity of the side supporting cross beam is improved, the side supporting cross beam is prevented from being bent under pressure, and the sinking of the closure beam section is further avoided.
(4) The side stay beams can be rotated parallel to the second beam to be fully received into the suspension gap. The total length of the two side bracing beams in the collinear state is larger than the width of the fixed beam section, and the stay cable and the supporting module are arranged at the edge of the fixed beam section, so that the side bracing beam is unscrewed after the closure beam section is rotated by 90 degrees, and the problem that the side bracing beam and the stay cable/supporting module collide with each other and are blocked can be avoided.
(5) Simultaneously, under the pull connection of the pull connection assembly, the two side support beams have higher straightness, and the first beam, the second beam, the side support beams and the pull connection assembly form a dish-shaped bearing structure, so that the bending moment born by the first rotating shaft can be greatly reduced, and the functional reliability, the bearing capacity and the service life of the invention are improved.
(6) The pull-connecting assembly comprises two L-shaped pull-connecting claws which are arranged in a central symmetry manner by taking the central position of the bottom surface of the lower extension vertical plate as the center. The two side bracing beams are coaxially arranged through the limiting oil cylinder, and the left side and the right side of the inner rotation end are provided with the pull-connection claws for stopping, so that the limiting of the side bracing beams is realized, the side bracing beams are prevented from being separated from the pull-connection assembly, the structural stability of the side bracing beam is improved, and the construction safety is ensured.
(7) The bottom surface of the inner rotation end is provided with a bottom cambered surface, the rotation center of the rotation connection position of the first cross beam and the second cross beam is matched with the bottom cambered surface, and the upper surface of the bottom plate is provided with a fitting cambered surface matched with the bottom cambered surface and a transverse clamping plane tangential to the fitting cambered surface. The invention can greatly improve the compatibility of the inclination angle of the internal rotation end, namely, the internal rotation end can be matched and pressed with the upper surface (the joint cambered surface or the transverse clamping plane) of the bottom plate no matter vertical or inclined, thereby improving the structural stability, avoiding the generation of a gap caused by the fact that the internal rotation end and the pull-connecting claw cannot be matched and jointed, and further avoiding unnecessary vibration and looseness caused by the gap.
(8) Because the side support beam does not rotate by taking the side support beam as a center, the side support beam inclines and transversely moves, the inner rotating end can be clamped at different positions of the top surface of the bottom plate, an extending cambered surface is arranged at one end of the attaching cambered surface, which is far away from the transverse clamping plane, an extending plane is arranged at one end of the transverse clamping plane, which is far away from the attaching cambered surface, and the extending cambered surface and the extending plane are both used for adapting and attaching and supporting the inner rotating end clamped in an inclined mode.
Drawings
The application is further described below with reference to the accompanying drawings:
FIG. 1 is a front view of the overall structure of the present invention;
FIG. 2 is a schematic view of a condition of an adjustment module lifting closure beam segment;
FIG. 3 is a schematic diagram of a conditioning module configuration;
FIG. 4 is a schematic diagram of a front view of a conditioning module configuration;
FIG. 5 is a schematic side view of a conditioning module configuration;
FIG. 6 is a schematic view of the side stay beam mounting location;
FIG. 7 is a side stay cross beam a unscrewing state schematic;
FIG. 8 is a schematic view of an end-on-end structure in front elevation view;
FIG. 9 is a schematic view of the position and structure of the downward extending protrusions;
FIG. 10 is a schematic view of the submerged state of the inner rotational end and closure beam segments;
FIG. 11 is a schematic view of a pull-on assembly from a slant bottom view;
FIG. 12 is a schematic view of a bottom arc structure from obliquely above;
Fig. 13 is a right-side view schematically showing a state in which the bottom arc surface is engaged with the pull-connecting claw;
FIG. 14 is a right side view schematically showing the bottom arc surface inclined and engaged with the pulling claw;
FIG. 15 is a schematic elevational view in cross-section of an extended arcuate and extended planar configuration;
FIG. 16 is a schematic view of the output shaft of the limiting cylinder inserted into the limiting hole;
fig. 17 is a schematic view of the bottom arc position obliquely from bottom.
Reference numerals illustrate:
In the drawing the view of the figure,
1. A support module;
2. a lifting module;
3. The adjusting module comprises a regulating module body 31, a first beam, a first linear driver 310, a 311, a lower extending vertical plate, a 312, a pull-connecting assembly, 3121, a pull-connecting claw, 31211, a bonding cambered surface, 31212, a transverse clamping plane, 31213, an extending cambered surface, 31214, an extending plane, 31215, a yielding groove, 32, a second beam, 320, a second linear driver, 3201, a hanging gap, 321, a lower extending plate, 322, an abutting inclined hole, 33, a rotating assembly, 34, a side supporting beam, 341, a first rotating shaft, 342, a containing cavity, 343, an inclined supporting arm, 3431, a lower extending bulge, 34311, an anti-skid layer, 344, an abutting hydraulic cylinder, 345, a lifting hydraulic cylinder, 346, a bottom cambered surface, 347, a limiting cylinder, 348 and a limiting hole;
4. the closure beam sections are 41, lifting lug plates 42 and stacking plates;
5. And fixing the beam segment, and 51, stay ropes.
Detailed Description
According to the above structural features of the present application, the embodiments of the present application will be further described:
Referring to fig. 1 to 3, the present embodiment provides a bridge deck crane for closure of a steel box girder midspan, comprising a support module 1 press-fitted and fixed on a fixed girder segment 5, a lifting module 2 connected with the support module 1, and an adjusting module 3 connected with the lifting module 2. The fixed beam section 5 is a standard beam section which is already constructed and is in a fixed state (realized by stay cables 51, a bearing column and the connecting force of the adjacent fixed beam sections 5), the fixed beam section 5 is provided with two sections, a gap is arranged between the two sections, and the closure beam section 4 is fixedly arranged in the gap to realize closure construction.
Referring to fig. 1 to 3, the support module 1 is a steel frame structure, and two ends are respectively erected and fixed on two sections of fixed beam segments 5. During construction, after the last section of standard beam section is installed, the bridge deck crane is in situ motionless, the front end top cross brace of the crane is dismantled, and the front end top support frames of the two bridge deck cranes are connected together (for example, fixedly connected through bolts) by adopting the connecting beam to form a steel frame structure, so that the bridge deck crane is used for supporting the lifting module 2, the adjusting module 3 and the closure beam section 4, and meanwhile, the counterweight for balancing the closure beam section 4 is not required to be additionally arranged, so that the construction steps can be simplified, the material requirements can be reduced, and the construction efficiency can be improved. The steel frame structure and the supporting frame are all conventional prior art in industry, and specific structures are not repeated.
Referring to fig. 2 to 3, the adjusting module 3 includes a first beam 31 and two second beams 32 that are in an i-shape, the two second beams 32 are separately disposed at two ends of the first beam 31, and the middle of the second beam 32 is disposed below the end of the first beam 31 and is rotatably connected (e.g., by a hinge), so as to implement longitudinal swinging of the second beam 32. The lower bottom surface of the second beam 32 is provided with a lower extension plate 321 (for example, by welding or by bolt fixing), the lower extension plate 321 is detachably connected with a lifting lug plate 41 on the top surface of the closure beam segment 4 (for example, by bolt detachable connection), the lifting lug plate 41 is vertically arranged and mounted on the top surface of the closure beam segment 4 (for example, by bolt detachable connection or by welding fixing connection, and then the root of the lifting lug plate 41 is removed or cut off, thereby removing the lifting lug plate 41).
Referring to fig. 1-3, the adjusting module 3 further includes a rotating assembly 33, the rotating assembly 33 includes a hoisting shell and a vertically arranged first motor, the motor shell of the first motor is fixedly installed in the hoisting shell (for example, fixedly connected by a bolt), and an output shaft of the first motor is rotationally connected (for example, hinged) with the middle part of the first cross beam 31, so that the longitudinal swing of the first cross beam 31 is realized, and because the second cross beam 32 can also swing longitudinally, the adjustment of the longitudinal slope and the transverse slope of the closure beam section 4 can be realized in a swing mode, so that the closure beam section 4 is aligned with the fixed beam section 5. The lifting module 2 comprises a crane, the crane comprises a transverse sliding pulley, a winch, a sling and a pulley block, the transverse sliding pulley is arranged on the connecting beam and/or the supporting frame and can transversely move, the winch is connected with the transverse sliding pulley, and the winch is connected with the lifting shell through the sling and the pulley block, so that the lifting of the adjusting module 3 is controlled and the lifting shell is prevented from rotating, the conventional prior art in the industry is adopted, and the conventional lifting device is not repeated.
Referring to fig. 3 and 4, a first linear actuator 310 is disposed between the rotating assembly 33 and the first beam 31, the first linear actuator 310 is disposed in an inclined manner, one end of the first linear actuator 310 is rotatably connected with the outer side wall of the lifting shell (for example, through a hinge connection), the other end of the first linear actuator 310 is rotatably connected with the top end of the first beam 31 (for example, through a hinge connection), and the first linear actuator 310 can drive the first beam 31 to swing longitudinally. The first linear drivers 310 are provided with two first linear drivers and are respectively connected with the left end and the right end of the first cross beam 31, so that one of the two first linear drivers 310 can be lengthened and the other one of the two first linear drivers can be shortened to rapidly and stably swing the first cross beam 31, and further the closure beam section 4 is driven to swing so as to align with the fixed beam section 5.
Referring to fig. 3 and 5, a second linear driver 320 is disposed between the first beam 31 and the second beam 32, the second linear driver 320 is disposed obliquely, one end of the second linear driver 320 is rotatably connected with a side wall of the first beam 31 (e.g. through a hinge connection), the other end is rotatably connected with a top surface of the second beam 32 (e.g. through a hinge connection), and the second linear driver 320 can drive the second beam 32 to swing longitudinally. The distance from the connection position of the second beam 32 and the second linear actuator 320 to the end (nearest one end) of the second beam 32 is 3/4 to 7/8 of the total length of the second beam 32, thereby having excellent force transmission capability. The second linear drivers 320 are provided with four second linear drivers 320, two second linear drivers 320 are arranged at the same end and two side positions of the first cross beam 31, wherein each second cross beam 32 is connected with two second linear drivers 320, and the two second linear drivers 320 connected with the same second cross beam 32 are arranged at the two sides of the same end of the first cross beam 31.
Referring to fig. 3, 6 and 10, a suspension gap 3201 is provided between the second cross beam 32 and the closure beam segment 4, and the suspension gap 3201 has a bar-shaped structure. A side support beam 34 with the middle part rotationally connected with the second beam 32 is arranged in the suspension gap 3201, and the side support beam 34 is in a straight rod structure. The middle part of the side support beam 34 is inserted with a first rotating shaft 341, the bottom end of the first rotating shaft 341 is fixedly connected with the side support beam 34 (for example, through bolts) and the top end of the first rotating shaft 341 is inserted in the inner cavity of the second beam 32, the inner cavity of the second beam 32 is provided with a second motor, the output shaft of the second motor is directly or indirectly connected with the top of the first rotating shaft 341 (for example, through a gear set), and the second motor can drive the first rotating shaft 341 and the side support beam 34 to synchronously rotate. The outer end and the inner end of the side support beam 34 are respectively arranged at two ends, and the outer end of the side support beam 34 can be screwed out of the suspension gap 3201 and is pressed on the fixed beam section 5 in a compression mode so that the support closure beam section 4 and the inner end can be screwed out of the suspension gap 3201 and pulled on the lower surface of the first beam 31. The inner rotating end can be screwed out of the hanging gap 3201 and positioned below the middle of the first cross beam 31, so that convenient pull-in connection is realized.
The middle part of the first rotating shaft 341 is connected with the socket on the bottom surface of the second cross beam 32 through a water stop bearing, so that the tightness is improved, and the second motor is ensured to run in a dry environment.
Referring to fig. 1, 6 and 7, the side bracing beam 34 can be rotated to be parallel to the second beam 32 so as to be received into the suspension gap 3201, and at this time, the inner rotating end and the outer rotating end are both located in the suspension gap 3201, so that the problem that the outer rotating end in an extending state can strike the support module 1 to cause clamping when the adjusting assembly and the closure beam segment 4 rotate can be avoided. The width of the closure beam section 4 is equal to that of the fixed beam section 5, in order to ensure that the closure beam section 4 can be transported on the fixed beam section 5, the length of the closure beam section 4 is required to be smaller than that of the fixed beam section 5, the width direction of the closure beam section 4 and the width direction of the fixed beam section 5 are in a vertical state, the closure beam section 4 can be conveniently moved, after hoisting, the closure beam section 4 is rotated by 90 degrees until the width direction of the closure beam section 4 and the width direction of the fixed beam section 5 are collinear, and then adaptive installation is carried out. The length of the single side support cross beam 34 is about 0.8 times of the width of the single fixed beam section 5, the total length of the two side support cross beams 34 in a collinear state is about 1.6 times of the width of the single fixed beam section 5, namely the total length of the two side support cross beams 34 in a collinear state is larger than the width of the fixed beam section 5, and the stay cables 51 and the support modules 1 are arranged at the edge positions of the fixed beam section 5, so that the side support cross beam 34 is unscrewed after the closure beam section 4 is rotated for 90 degrees, and the problem that the side support cross beam 34 collides with the stay cables 51/the support modules 1 and is blocked can be avoided.
Refer to fig. 8-10. The outer rotating end is internally provided with a diagonal bracing arm 343 which can be rotated out to point obliquely upwards and is abutted against the second cross beam 32, so that a vertically arranged triangular supporting structure is formed to avoid overload bending of the side bracing cross beam 34. The end inner cavity of the diagonal brace arm 343 close to the second beam 32 is provided with an abutting hydraulic cylinder 344, and an output shaft of the abutting hydraulic cylinder 344 can extend out of the inner cavity of the diagonal brace arm 343 to be clamped with the abutting inclined hole 322 on the side wall of the second beam 32, so that the diagonal brace arm 343, the abutting hydraulic cylinder 344, the second beam 32 and the side support beam 34 form a stable triangular supporting structure, the bearing capacity of the side support beam 34 is improved, and the side support beam 34 is prevented from being bent under pressure.
The abutting inclined holes 322 are arc blind hole structures. Since the second beam 32 can swing relative to the first beam 31, the side stay beam 34 and the abutting hydraulic cylinder 344 can swing relative to the first beam 31, and when the abutting hydraulic cylinder 344 in the inclined state extends the output shaft, the end of the output shaft can be inserted into the arc-shaped abutting inclined hole 322.
Referring to fig. 9, a gap is provided between the bottom surface of the side support beam 34 and the top surface of the closure beam segment 4, so that the problem that the side support beam 34 is difficult to unscrew due to mutual friction between the bottom surface of the side support beam 34 and the top surface of the closure beam segment 4 is avoided, and because the top surface of the closure beam segment 4 and the top surface of the fixed beam segment 5 are required to be kept flush with each other in a supporting state, that is, a gap is also required to be provided between the bottom surface of the side support beam 34 and the top surface of the fixed beam segment 5. The end of the diagonal brace arms 343 remote from the second cross beam 32 is provided with a downwardly extending projection 3431 (e.g. by an integral fixed connection) and the downwardly extending projection 3431 is used to crimp the fixed beam segment 5 to compensate for the gap between the side brace cross beam 34 and the fixed beam segment 5.
Referring to fig. 9, the side bracing beam 34 is provided with a containing cavity 342 with an opening on the top surface for containing the diagonal bracing arm 343, the bottom end of the diagonal bracing arm 343 is inserted into the containing cavity 342 and is in rotary connection (e.g. hinged) with the side bracing beam 34, a lifting hydraulic cylinder 345 is installed in the containing cavity 342, the bottom end of the lifting hydraulic cylinder 345 is hinged with the side bracing beam 34, and the top end of the lifting hydraulic cylinder 345 is hinged with the middle of the diagonal bracing arm 343. The lifting hydraulic cylinder 345 can drive the diagonal arm 343 to swing out of the receiving chamber 342 or retract into the receiving chamber 342.
Referring to fig. 9, in the completed state of the triangular support structure, the diagonal brace arms 343 are inclined, and the downward extending protrusions 3431 are inclined downward and press-contact with the fixed beam segments 5. When the diagonal arm 343 is rotated until the diagonal arm 343 is nearly horizontally placed in a state of abutting against the hydraulic cylinder 344 and entering the accommodating cavity 342, the lower extension protrusion 3431 is rotated upwards, so that the lower extension protrusion 3431 cannot contact and rub with the closure beam segment 4 during the rotation of the side support beam 34, and the side support beam 34 is smoothly screwed in or screwed out. The side wall of the receiving chamber 342 remote from the second cross member 32 has an opening structure for receiving the downwardly extending projection 3431 and draining water (e.g., rainwater) accumulated in the receiving chamber 342.
Referring to fig. 9, a slip-resistant layer 34311 is fixedly mounted (e.g., by bolting or by bonding) to the bottom surface of the lower extension 3431. The slip resistant layer 34311 is made of a rubber material to increase friction with the fixed beam section 5.
Referring to fig. 10 and 11, under the pull-connection of the closure beam segment 4 and the supporting action of the fixed beam segment 5, the side bracing beam 34 has a tendency to vertically rotate, and the first rotating shaft 341 receives a large bending moment. In order to avoid the problem of the overload bending of the first rotating shaft 341, referring to fig. 11, the bottom surface of the first beam 31 is provided with a lower extending vertical plate 311 (for example, through a bolt fixed connection or through an integral fixed connection), the middle lower part of the lower extending vertical plate 311 is provided with a pull-connection assembly 312, and the pull-connection assembly 312 can pull up the inner rotation end, so as to avoid the problem that the inner rotation end is in a sinking trend due to lack of connection, that is, the pull-connection assembly 312 can pull up the inner rotation end to avoid the sinking of the closure beam segment 4, meanwhile, under the pull-connection of the pull-connection assembly 312, the two side supporting beams 34 have higher straightness, and the first beam 31, the second beam 32, the side supporting beams 34 and the pull-connection assembly 312 form a dish-shaped bearing structure, so that the bending moment borne by the first rotating shaft 341 can be greatly reduced (the problem that the inner rotation end is sinking can further increase the bending degree of the first rotating shaft 341).
Referring to fig. 11, the pull-on assembly 312 includes two L-shaped pull-on fingers 3121, the pull-on fingers 3121 including a bottom plate and a riser fixedly attached in an L-shape, the riser being fixedly mounted at a side wall location of the lower extension riser 311 (e.g., fixedly attached by bolts or fixedly attached by welding), the bottom plate being located below the lower extension riser 311. A transverse clamping groove is formed between the bottom plate of the pull-connecting claw 3121 and the lower extending vertical plate 311, and openings of the two transverse clamping grooves are respectively directed to two sides of the lower extending vertical plate 311 so as to be matched and clamped with the inner rotating ends from two sides. Pull-on fingers 3121 apply a clamping force to the inner rotating end and an upward pulling force. The two transverse clamping grooves are arranged in a central symmetry manner by taking the central position of the bottom surface of the lower extension vertical plate 311 as the center.
Referring to fig. 11 to 14, the bottom surface of the inner rotating end is provided with a bottom arc surface 346, a rotation center (for example, a hinge shaft) at a rotation connection position of the first beam 31 and the second beam 32 is adapted to the bottom arc surface 346 (coaxially arranged), and the upper surface of the bottom plate is provided with a fitting arc surface 31211 adapted to the bottom arc surface 346 and a transverse clamping plane 31212 tangential to the fitting arc surface 31211. Because the second cross beam 32 rotates relative to the first cross beam 31, the side supporting cross beam 34 and the inner rotating end also rotate relative to the first cross beam 31, so that the inner rotating end may have different inclined angles instead of being in a standard vertical state all the time.
Referring to fig. 13, the transverse clip plane 31212 is used to ensure that the lateral rotation of the inner rotational end is smoothly placed within the transverse clip slot.
Referring to fig. 14 and 15, since the side support beam 34 does not rotate about itself and moves laterally while tilting, the inner rotating end is engaged with different positions on the top surface of the base plate, so that an extending arc surface 31213 is disposed at one end of the attaching arc surface 31211 away from the lateral clamping plane 31212, an extending plane 31214 is disposed at one end of the lateral clamping plane 31212 away from the attaching arc surface 31211, and the extending arc surface 31213 and the extending plane 31214 are both used for fitting and supporting the inner rotating end engaged in a tilting manner.
Referring to fig. 14 and 15, the bottom end of the side wall of the riser, which is close to the bottom plate, is provided with a yielding groove 31215, and the yielding groove 31215 is used for accommodating the inclined inner rotation end side wall.
Referring to fig. 16, a limiting cylinder 347 (for example, fixedly connected by a bolt) is disposed in the inner cavity of one inner end, and an output shaft of the limiting cylinder 347 can extend from the inner end surface and be inserted into a limiting hole 348 of the other inner end surface, so that the two side supporting beams 34 are kept coaxial and are prevented from falling out from the transverse clamping groove. When the end surfaces of the two inner rotation ends are oppositely arranged, namely when the two side support beams 34 are coaxially arranged, the output shaft of the limiting cylinder 347 is matched with the limiting hole 348. The two side bracing beams 34 are coaxially arranged through the limiting cylinder 347, and the pull-connecting claws 3121 are arranged on the left side and the right side of the inner rotation end to stop, so that the limit of the side bracing beams 34 is realized, the side bracing beams 34 are prevented from being separated from the pull-connecting assembly 312, and the structural stability of the invention is improved.
Referring to fig. 17, the height of bottom arc surface 346 is located in the middle of side supporting beam 34, so that a cavity is formed below bottom arc surface 346, and is used for providing a receiving space for the bottom plate of pull-joint claw 3121, and the bottom plate is inserted into the cavity to realize the engagement of the inner rotation end and pull-joint claw 3121. The limit cylinder 347 is installed above the bottom camber surface 346.
The construction method for the closure of the middle span of the steel box girder comprises the following steps of:
s1, connecting the lower extension plate 321 with the lifting lug plate 41 through bolts.
S2, under the state that the outer rotating end and the inner rotating end are both arranged in the hanging gap 3201, hoisting, traversing and rotating the closure beam segments 4 are carried out until the closure beam segments 4 are positioned above the gaps among the fixed beam segments 5 and fit with the (directions and positions of the) gaps.
S3, the side support cross beams 34 are rotated to be perpendicular to the second cross beam 32, and the inner rotation ends of the two side support cross beams 34 are clamped into the pull-connecting assembly 312, and the end faces of the two inner rotation ends are oppositely arranged.
And S4, the output shaft of the limiting cylinder 347 extends out and is inserted into the limiting hole 348 so as to realize limiting and fixing of the side support beam 34, then the inclined support arm 343 extends out, and then the output shaft of the abutting hydraulic cylinder 344 extends out of the inclined support arm 343 and is clamped into the abutting inclined hole 322 so as to form a triangular supporting structure.
S5, the closure beam section 4 is lowered and inserted into the notch until the triangular support structure is in pressure connection with the fixed beam section 5 (indirect pressure connection is realized by utilizing the lower extension bulge 3431).
S6, temporarily connecting the closure beam section 4 with the fixed beam section 5 by adopting a code plate 42. One end of the code plate 42 is welded with the closure beam segment 4 and the other end is welded with the fixed beam segment 5. The code plates 42 are provided with a plurality of code plates which are respectively arranged at two sides of the side support cross beam 34 and used for keeping balance of the closure beam sections 4 and avoiding the problem that the closure beam sections 4 incline sideways.
S7, permanently and fixedly connecting the closure beam segment 4 with the fixed beam segment 5 (e.g. by welding or by high strength bolts), and then removing the code plate 42 (e.g. in the form of cutting).
And S8, removing bolts between the lower extension plate 321 and the lifting lug plate 41, separating the lower extension plate 321 from the lifting lug plate 41, and removing the adjusting module 3.
The first linear actuator 310, the second linear actuator 320, the abutting hydraulic cylinder 344, the lifting hydraulic cylinder 345, and the limiting cylinder 347 are all conventional hydraulic cylinders and are respectively connected and communicated with an oil pump through oil pipes, and the oil pump is connected and communicated with an oil tank.
The invention further comprises an electric cabinet fixedly arranged in the inner cavity of the first cross beam 31 through bolts, wherein the first motor, the traversing pulley, the winch, the second motor and the oil pump are respectively connected with the electric cabinet through wires and signal wires, the electric cabinet is respectively connected with an external power supply and an external computer through wires and signal wires, and the computer controls the starting and stopping working states of the first motor, the traversing pulley, the winch, the second motor and the oil pump through the electric cabinet.
The invention has simple structure and reliable function, the side support cross beam 34 can be laterally screwed out and pressed on the fixed beam section 5, the stability of the closure beam section 4 is improved by utilizing the friction force between the side support cross beam 34 and the fixed beam section 5, the problem of difficult installation of the first block of code plate 42 caused by shaking of the closure beam section 4 is avoided, and meanwhile, the top surface of the closure beam section 4 and the top surface of the fixed beam section 5 are ensured to be aligned so as to facilitate the later permanent fixed connection.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, connected via an intermediate medium, or connected in communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In view of the foregoing, it will be appreciated by those skilled in the art that, based on the teachings herein, changes, modifications, substitutions and alterations can be made without departing from the principles and spirit of this invention.
Claims (10)
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| CN202510569893.XA CN120081293B (en) | 2025-05-06 | 2025-05-06 | A bridge crane and construction method for closure of mid-span steel box beams |
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| CN120081293B (en) | 2025-08-12 |
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