CN212052327U - Movable type dismounting and hoisting tool for temporary supporting system of small box girder type hidden cover beam of road and bridge prefabrication - Google Patents
Movable type dismounting and hoisting tool for temporary supporting system of small box girder type hidden cover beam of road and bridge prefabrication Download PDFInfo
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- CN212052327U CN212052327U CN201921768674.0U CN201921768674U CN212052327U CN 212052327 U CN212052327 U CN 212052327U CN 201921768674 U CN201921768674 U CN 201921768674U CN 212052327 U CN212052327 U CN 212052327U
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Abstract
The utility model discloses a movable disassembly and hoisting tool for a temporary supporting system of a prefabricated small box girder type hidden cover girder of a road bridge, which is used for suspending a girder middle beam section or a W-shaped truss of the temporary supporting system; the device comprises two movable hoisting devices, namely a first movable hoisting device and a second movable hoisting device; the first movable hoisting equipment and the second movable hoisting equipment are symmetrically arranged on two sides of the transverse bridge axial center line of the bridge section and are respectively fixed with the middle beam section of the main beam or the W-shaped truss; each movable lifting device comprises a translatable suspension mechanism, a track assembly, and a horizontal displacement apparatus. Therefore, the utility model discloses girder middle part beam section or W shape truss can be suspended in midair, not only be convenient for demolish girder middle part beam section or W shape truss and each parts between be connected, can also stride with girder middle part beam section or the unanimous bridge span of W shape truss after each component dissociates to hang down to the flatbed on, realize girder middle part beam section or the loading of W shape truss and prepare.
Description
Technical Field
The utility model relates to a dismantle hoist and mount frock, especially a hoist and mount frock that is used for supplementary girder middle part beam section, the W-shaped truss of main purlin system of dismantling prefabricated trabecula formula hidden cover beam temporary support system of road bridge.
Background
Generally, the approximate cost of the cast-in-place box girder adopted by the main bridge with the same area is greater than the approximate cost of the prefabricated small box girder, so that the construction cost can be greatly reduced by selecting the prefabricated small box girder in the bridge deck construction of the road bridge from the aspect of cost saving, and meanwhile, the construction period can be shortened by adopting the construction mode.
When the bridge deck of the road bridge is constructed by adopting the prefabricated small box girders, a plurality of parallel prefabricated small box girders are bridged between two adjacent piers in the longitudinal direction of the bridge deck (the length extending direction of the bridge deck); and continuous pavement of the bridge deck can be realized only by splicing the bent caps between the small prefabricated box girders between two adjacent spans.
When constructing the above-mentioned road, bridge and bridge surfaces, it is necessary to set up a support system in advance. As in the post-cast hidden-cover beam construction method for converting a simply supported beam into a continuous beam described in chinese patent CN101538831A, a temporary support system is disclosed: 3 spliced phi 273 multiplied by 7 steel pipes are used as vertical supports (the column spacing is 12.5 m), and double spliced 56a I-shaped steel is arranged as a temporary support beam of the hollow plate beam. Meanwhile, in order to reduce the span of the supporting beam, the bottom of the vertical supporting beam is additionally provided with the inclined strut, and the inclined strut is provided with a plurality of connecting rods so as to reduce the calculated length of the inclined strut and improve the overall stability of the support system, so that the lower supporting beam forms a truss system. Because the supporting system is designed for the road and bridge construction of which the main bridge is a PC hollow plate girder (span is 20m, the height of the girder is 90cm, and the weight of a single girder is 22.2 tons), the supporting system is not suitable for the road and bridge construction of which the main bridge is a prefabricated small box girder (90 tons/piece, and more than 3 times of the PC hollow plate girder) due to the limitation of the bearing capacity; in addition, more importantly, the supporting system is limited to the range of the bearing platform, and the used truss system, in order to reduce the length ratio of the main supporting column, the supporting area is provided with densely distributed rods, so that vehicles (for carrying each component of the supporting system or prefabricated box girders) cannot pass through during construction, thereby increasing the removal of the supporting system and not improving the efficiency of deck construction by improving the transportation capacity well.
Disclosure of Invention
The invention provides a movable dismounting and hoisting tool for a temporary supporting system of a small box girder type hidden cover girder of a road and bridge prefabricated small box girder type hidden cover girder, which is used for suspending a middle girder section when the middle girder section of the main girder of the temporary supporting system of the small box girder type hidden cover girder of the road and bridge prefabricated small box girder type hidden cover girder is connected with related components, and hoisting the middle girder section of the main girder to a flat car for transportation after the connection relationship between the middle girder section of the main girder and the related components is released. The method can also be used for suspending the W-shaped truss when the W-shaped truss of the main truss system of the prefabricated small box girder type hidden cover girder temporary supporting system of the road bridge is connected with each related component, and after the connection relationship between the W-shaped truss and each related component is released, the W-shaped truss is hung on the flat car and transported out.
In order to achieve the technical purpose, the utility model adopts the following technical proposal:
a movable dismounting and hoisting tool for a temporary supporting system of a small box girder type hidden cover girder of a road bridge is used for suspending a girder middle beam section or a W-shaped truss of the temporary supporting system; comprises two movable hoisting devices; the two movable hoisting devices are respectively a first movable hoisting device and a second movable hoisting device; the road bridge comprises a plurality of bridge sections arranged along the bridge direction, and each bridge section comprises a plurality of prefabricated small box girders arranged along the bridge direction of the road bridge and a first hidden cover girder and a second hidden cover girder which are arranged along the bridge transverse direction of the road bridge and cast in situ with two ends of each prefabricated small box girder respectively;
the first movable hoisting equipment and the second movable hoisting equipment are symmetrically arranged on two sides of the transverse bridge axial center line of the bridge section and are respectively fixed with the middle beam section of the main beam or the W-shaped truss;
each movable hoisting device comprises a translational suspension mechanism, a track assembly and a horizontal displacement device; wherein:
one end of the track assembly is fixed on the first hidden cover beam, the other end of the track assembly extends along the length direction of the small prefabricated box beams, and the track assembly is provided with a gap communicated with a gap between every two adjacent small prefabricated box beams;
the translatable suspension mechanism comprises a movable trolley capable of translating along the track assembly and a suspension mechanism with a fixed end fixed on the movable trolley; the actuating end of the suspension mechanism can sequentially penetrate through a gap of the track assembly and a gap between two adjacent prefabricated small box girders and then is fixed with a girder middle beam section or a W-shaped truss below the first hidden cover beam;
the horizontal shifting device is fixed on the second hidden cover beam, and the power output end of the horizontal shifting device is fixed with the movable trolley through a traction part;
the movable trolley can translate along the track assembly under the power action of the horizontal displacement device and the traction of the traction part.
Further, the track assembly includes a movable track; one end of the movable track in the bridge direction is positioned above the first hidden cover beam, and the other end of the movable track is divided into two sub tracks with gaps along the bridge direction, namely a first sub track and a second sub track;
the first sub-track and the second sub-track are laid along two adjacent prefabricated small box girders, and track pad girders are arranged between the first sub-track and the second sub-track and the corresponding prefabricated small box girders respectively.
Furthermore, the movable trolley comprises a supporting girder and a foundation girder; the foundation girders are provided with two, namely a foundation girder a and a foundation girder b;
the supporting girder is arranged across the first sub-rail and the second sub-rail; and the two ends of the supporting girder are respectively fixed with one end of the foundation girder a and one end of the foundation girder b in a one-to-one correspondence manner,
the other end of the foundation girder a and the other end of the foundation girder b are respectively arranged above the first sub-rail and the second sub-rail through rollers matched with the rail assemblies;
the suspension mechanism comprises an electric hoist and a suspension steel wire rope connected with the power output end of the electric hoist;
the electric hoist is fixed at the middle position of the supporting girder, and the end part of the suspension steel wire rope sequentially passes through a gap between the first sub rail and the second sub rail and a gap between two adjacent prefabricated small box girders and then is fixed with the girder middle beam section or the W-shaped truss below the first hidden cover beam.
Further, the traction component is a traction steel bundle.
Furthermore, the horizontal shifting device comprises a power mechanism, and the output end of the power mechanism is fixed with the movable trolley through a traction steel bundle; the power mechanism is arranged in the range of the second hidden cover beam through the reaction frame assembly.
Furthermore, the power mechanism is a continuous jack, and the continuous jack is fixed above the second hidden cover beam through the counterforce frame assembly.
Further, the reaction frame assembly comprises a jack support beam, a hand-operated hoist, a reaction support and an anchoring screw rod;
the upper end of the counter-force support is provided with a jack support beam, and the lower end of the counter-force support is anchored with the second hidden cover beam through an anchoring screw rod;
the hand hoist supporting beam is fixed with the jack supporting beam;
the fixed end of the hand hoist is fixed with the hand hoist supporting beam, and the actuating end of the hand hoist is fixed with the fixed end of the continuous jack.
Furthermore, two ends of the jack support beam are symmetrically provided with a manual hoist support beam; the hand hoist can be fixed with any one of the hand hoist supporting beams at the two ends of the jack supporting beam.
According to foretell technical scheme, for prior art, the utility model has the advantages of as follows:
the utility model discloses a dismantlement hoist and mount frock of specific structural style to suspend interim supporting system (prefabricated trabecula formula hidden bent cap interim supporting system of road bridge, including girder, main mound supporting system, side mound supporting system) in the girder middle part beam section of main mound supporting system top in midair, on the one hand, after being convenient for suspend in midair, the removal of each connection point between girder middle part beam section and the main mound supporting system respectively, on the other hand, through dismantling the horizontal shift device of hoist and mount frock, the cooperation of travelling car, can be with near the midspan of girder middle part beam section translation bridge section after each component dissociation, then start the suspension mechanism, transport out girder middle part beam section to the flatbed;
in addition, the dismounting and hoisting tool can also be used for assisting the dismounting and loading of the W-shaped truss of the main pier supporting system, and the principle is similar to that of the middle beam section of the main beam.
Drawings
Fig. 1 is a schematic structural view of a dismounting and hoisting tool (in a first state) for a middle girder segment (a girder segment a supported above a main pier supporting system) according to the present invention;
fig. 2 is a structural schematic view of a dismounting and hoisting tool (in a second state) for a middle girder segment (a girder segment a supported above a main pier supporting system) according to the present invention;
FIG. 3 is a schematic illustration of the first translatable suspension mechanism (transaxle-wise) of FIG. 1;
FIG. 4 is a schematic illustration of the first translatable suspension mechanism (transverse) of FIG. 1;
FIG. 5 is a configuration diagram of the first horizontal displacement device in FIG. 1;
in FIGS. 1-5: 11-1, a girder middle beam section; 14-1, a first hidden cover beam; 14-2, a second hidden cover beam; 15. prefabricating a small box girder; 2. a main pier support system; 41. a first translatable suspension mechanism; 42. a first track assembly; 43. a first horizontal shifting device; 51. a second translatable suspension mechanism; 52. a second track assembly; 53. a second horizontal shifting device;
41-1, supporting the girder; 41-2, foundation girders; 41-3, electric hoist; 41-4, a traction lifting lug; 41-5, drawing steel bundles; 41-6, hanging a steel wire rope; 41-7, movable vehicle rollers; 41-8, a base of the electric hoist; 42-1, a movable track; 42-2, rail pad beam a; 42-3, a track pad beam b;
43-1, supporting the beam by a jack; 43-2, a hand hoist supporting beam; 43-3, a hand-operated block; 43-4, a continuous jack; 43-5, a counter-force bracket; 43-6 and an anchoring screw.
FIG. 6 is a schematic structural diagram of a temporary supporting system of a prefabricated small box girder hidden cover girder of a road bridge;
in fig. 6: 11-a main beam; 12-a first cantilever beam; 13-a second cantilever beam; 14-hidden capping beam; 15-prefabricating a small box girder; 21-main pier cap; 22-main pier upright columns; 23-main pier pad beam; 24-vertical support of the main pier; 25-a main truss system; 31-side pier cap; 32-side pier upright columns; 33-side pier pad beam; 34-side pier vertical support.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The relative arrangement of the components and steps, expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented in other different ways (rotated 90 degrees or at other orientations).
In order to facilitate the description of the disassembly and hoisting tool of the present invention, the present invention first introduces a temporary supporting system of the prefabricated small box girder hidden cover beam of the road and bridge in more detail, as shown in fig. 6, the temporary supporting system is a cantilever supporting system for supporting the prefabricated small box girder hidden cover beam of the road and bridge; comprises a main beam 11, a main pier supporting system and a side pier supporting system 34; wherein:
the main beam 11 is arranged along the transverse side of a road bridge pier (the transverse direction refers to the width direction of a road bridge deck, and the horizontal direction of the attached drawing 1), and is formed by splicing two sections, namely a main beam 11 beam section a supported by a main pier supporting system and a main beam 11 beam section b, one end of the main beam 11 beam section a is supported on a side pier supporting system 34, and the other end of the main beam 11 beam section b can be spliced with the main beam 11 beam section a; the main pier comprises a main pier cap 21 and a main pier stud 22 arranged on the main pier cap 21, and the side pier comprises a side pier cap 31 and a side pier stud 32 arranged on the side pier cap 31.
In order to reduce the cost of temporary measures and reduce the consumption of a steel structure of the main beam 11, two ends of the main beam 11 are respectively provided with a section of cantilever beam which is correspondingly a first cantilever beam 12 and a second cantilever beam 13. So as to be used as a construction operation platform and a supporting platform of a part of cast-in-situ hidden cover beam 14 bracket. The cantilever beam is of a variable cross-section I-shaped structure. Is matched with the main beam 11 and is in a double-spliced state, and the width of the single beam flange plate is consistent with that of the single main beam 11 flange of the main beam 11. The cantilever beam is connected with the main beam 11 by high-strength bolts.
The main pier supporting system is arranged on the transverse side of the main pier area and is positioned below the main beam 11, the lower end of the main pier supporting system is fixed with the main pier bearing platform 21, and the upper end of the main pier supporting system is fixed with the main beam 11; in the drawings, the main pier supporting system is provided on the laterally outer side of the main pier stud 22.
In order to meet the supporting requirement of the prefabricated small box girder type hidden cover beam of the road and bridge, the main pier supporting system comprises a main pier pad beam 23, a main pier vertical support 24 and a main truss system 25, wherein:
the main truss system 25 comprises an upper chord plate, a lower chord plate and a W-shaped truss arranged between the upper chord plate and the lower chord plate; the W-shaped truss is composed of two outer web members and two inner web members, wherein the two inner web members form an inverted V-shaped component at the middle position of the W-shaped truss, the two outer web members are symmetrically arranged on the outer side of the inverted V-shaped component, the inclination angle of the outer web members relative to the lower chord members is 42.3 degrees (preferably not lower than 40 degrees), and meanwhile, the total length of the truss does not exceed the maximum length of the general flat car by 17m, so when the total length of the upper chord members is 16 m and the total height of the W-shaped truss is 5m, the inclination angle of the inner web members is 65 degrees.
The two main pier vertical supports 24 are arranged between the lower end of the W-shaped truss and the pad beam and are respectively a first main pier vertical support 24 and a second main pier vertical support 24; the upper ends of the first and second main pier vertical supports 24 can be fixedly connected with the lower surface of the lower chord plate through the detachable connecting piece b, and the lower ends of the first and second main pier vertical supports 24 can be fixed with the main pier pad beam 23 through the detachable connecting piece c.
The attachment point (flanged) of the first main pier vertical support 24 to the lower chord is located corresponding to the location of attachment point E, and the attachment point (flanged) of the second main pier vertical support 24 to the lower chord is located corresponding to the location of attachment point F.
The side pier supporting system 34 is arranged on the transverse side of the side pier region and located below the main beam 11, the lower end of the side pier supporting system 34 is fixed with the side pier bearing platform 31, and the upper end of the side pier supporting system is fixed with the main beam 11. In the drawings, the side pier support system 34 is disposed laterally outboard of the side pier stud 32.
Specifically, the side pier supporting system 34 includes a side pier vertical support, the upper end of the side pier vertical support is fixedly connected with the main beam 11 by a bolt fastener in a flange connection manner, and the lower end of the side pier vertical support is fixed with the side pier supporting platform 31 in a welding fixing manner.
The stress distribution of the side pier supporting area in the supporting range influenced by the bending effect of the main beam 11 is uneven, and the peak stress of the main beam 11 occurs near a pad beam connected with the side pier vertical support due to the problem of supporting points, so that a pad beam system vertical to a web plate of the main beam 11 is arranged (namely the web plate of the pad beam and the web plate of the main beam 11 are arranged at an angle of 90 degrees). The side pier pad beam 33 is constructed by welding a steel box beam. 1 support stiffening rib is arranged at the interval of 20cm along the length direction of the web plate of the side pier pad beam 33, and the stiffening ribs are fully distributed along the cross section direction at the corresponding position of the web plate of the main beam 11 (the rest stiffening ribs are only arranged at the outer side of the web plate); meanwhile, 1 longitudinal stiffening is additionally arranged on the outer side of the top plate to adapt to the stress concentration effect caused by the bending of the main beam 11, and the longitudinal stiffening corresponds to the local stiffening of the main beam 11.
Aiming at the removal of the girder middle beam section 11-1 (girder beam section a) of the temporary supporting system and the main pier supporting system 2 below the girder middle beam section, the utility model provides a movable type dismounting and hoisting tool, which, as shown in the figure 1-5, not only meets the function of vertical frame falling, but also needs to have horizontal sliding capacity and comprises two movable hoisting devices; the two movable hoisting devices are respectively a first movable hoisting device and a second movable hoisting device; the road and bridge comprise a plurality of bridge sections arranged along the bridge direction, each bridge section comprises a plurality of prefabricated small box girders 15 arranged along the bridge direction of the road and bridge, and a first hidden cover girder 14-1 and a second hidden cover girder 14-2 which are arranged along the bridge transverse direction of the road and bridge and cast in situ with two ends of each prefabricated small box girder 15 respectively;
the first movable hoisting equipment and the second movable hoisting equipment are symmetrically arranged on two sides of the transverse bridge axial center line of the bridge section and are respectively fixed with the middle beam section 11-1 of the main beam or the W-shaped truss; the suspension points are ensured to cover the main girders and the main girder system under the state that the position of the transverse bridge is changed.
Each movable hoisting device comprises a translational suspension mechanism, a track assembly and a horizontal displacement device; in other words, the first movable lifting apparatus comprises a first translatable suspension mechanism 41, a first track assembly 42, a first horizontal displacement device 43; the second movable lifting device comprises a second translatable suspension 51, a second track assembly 52, a second horizontal displacement apparatus 53,
wherein: one end of the track assembly is fixed on the first hidden cover beam 14-1, the other end of the track assembly extends along the length direction of the small prefabricated box beam 15, and the track assembly is provided with a gap communicated with a gap between two adjacent small prefabricated box beams 15; the translatable suspension mechanism comprises a movable trolley capable of translating along the track assembly and a suspension mechanism with a fixed end fixed on the movable trolley; the actuating end of the suspension mechanism can sequentially penetrate through a gap of the track assembly and a gap between two adjacent small prefabricated box girders 15 and then is fixed with a girder middle beam section 11-1 or a W-shaped truss below the first hidden cover beam 14-1; the horizontal shifting device is fixed on the second hidden cover beam 14-2, and the power output end of the horizontal shifting device is fixed with the movable trolley through a traction part; the movable trolley can translate along the track assembly under the power action of the horizontal displacement device and the traction of the traction part. In this embodiment, the traction component is a traction steel bundle 41-5.
Further, the track assembly includes a movable track 42-1; one end of the movable track 42-1 in the bridge direction is positioned above the first hidden cover beam 14-1, and the other end is divided into two sub tracks with gaps along the bridge direction, namely a first sub track and a second sub track; the first sub-track and the second sub-track are laid along two adjacent small prefabricated box girders 15, track pad beams are respectively arranged between the first sub-track and the second sub-track and the corresponding small prefabricated box girders 15, and the track pad beams are divided into a track pad beam a42-2 and a track pad beam b 42-3.
The track is movable track 42-1, means after the dismouting, the track can be dismantled, makes things convenient for reuse next time. 22a I-shaped steel is adopted on one side of the track (the length of the track on one side of each pier is 9.0 m), and angle steel is welded on the top of the track to serve as a lateral limiting component. And a track pad beam is laid at the bottom of the temporary construction track, is perpendicular to the temporary construction track and is used for adjusting the height difference between the cast-in-place hidden cover beam section and the prefabricated small box beam 15 section.
Further, the movable trolley comprises a supporting girder 41-1 and a foundation girder 41-2; the foundation girders 41-2 are provided with two foundation girders 41-2a and 41-2 b; the supporting girder 41-1 is arranged across the first sub rail and the second sub rail; two ends of the supporting girder 41-1 are respectively fixed with one end of the foundation girder 41-2a and one end of the foundation girder 41-2b in a one-to-one correspondence manner, and the other end of the foundation girder 41-2a and the other end of the foundation girder 41-2b are respectively arranged above the first sub rail and the second sub rail through a roller 41-7 matched with the rail component; the suspension mechanism comprises an electric block 41-3 and a suspension steel wire rope 41-6 connected with the power output end of the electric block 41-3; the base 41-8 of the electric hoist is fixed at the middle position of the supporting girder 41-1, and the end part of the suspension steel wire rope 41-6 passes through the gap between the first branch rail and the second branch rail and the gap between the two adjacent small prefabricated box girders 15 in sequence and then is fixed with the girder middle beam section 11-1 or the W-shaped truss below the first hidden cover beam 14-1.
Further, as shown in fig. 5, the horizontal displacement device comprises a power mechanism, and an output end of the power mechanism is fixed with a traction lifting lug 41-4 on the moving trolley through a traction steel bundle 41-5; the power mechanism is arranged in the range of the second hidden cover beam 14-2 through the reaction frame assembly. The power mechanism is a continuous jack 43-4, and the continuous jack 43-4 is fixed above the second hidden cover beam 14-2 through a counterforce frame assembly. The reaction frame assembly comprises a jack supporting beam 43-1, a manual hoist supporting beam 43-2, a manual hoist 43-3, a reaction support 43-5 and an anchoring screw 43-6; the upper end of the counter-force bracket 43-5 is provided with a jack supporting beam 43-1, and the lower end is anchored with the second hidden cover beam 14-2 through an anchoring screw 43-6; the manual hoist supporting beam 43-2 is fixed with the jack supporting beam 43-1; the fixed end of the manual hoist 43-3 is fixed to the manual hoist supporting beam 43-2, and the actuating end of the manual hoist 43-3 is fixed to the fixed end of the continuous jack 43-4. The two ends of the jack supporting beam 43-1 are symmetrically provided with manual hoist supporting beams 43-2; the hand block 43-3 can be fixed with any one of the hand block supporting beams 43-2 at both ends of the jack supporting beam 43-1. Specifically, the reaction frame adopts a box-shaped section and has a bilateral tensioning function. The bottom of the reaction frame is anchored in the hidden cover beam through finish rolling deformed steel bars. The top of the counter-force frame is provided with a hand-operated hoist crane (used for hoisting the continuous jack 43-4) mounting frame which comprises 2 lines of 45a I-steel and 4 lines of 22a I-steel vertical to the 45a I-steel, and the hand-operated hoist crane is hung at the position of the 22a I-steel.
Claims (8)
1. A movable dismounting and hoisting tool for a temporary supporting system of a small box girder type hidden cover girder of a road bridge is used for suspending a girder middle beam section or a W-shaped truss of the temporary supporting system; the device is characterized by comprising two movable hoisting devices; the two movable hoisting devices are respectively a first movable hoisting device and a second movable hoisting device; the road bridge comprises a plurality of bridge sections arranged along the bridge direction, and each bridge section comprises a plurality of prefabricated small box girders arranged along the bridge direction of the road bridge and a first hidden cover girder and a second hidden cover girder which are arranged along the bridge transverse direction of the road bridge and cast in situ with two ends of each prefabricated small box girder respectively;
the first movable hoisting equipment and the second movable hoisting equipment are symmetrically arranged on two sides of the transverse bridge axial center line of the bridge section and are respectively fixed with the middle beam section of the main beam or the W-shaped truss;
each movable hoisting device comprises a translational suspension mechanism, a track assembly and a horizontal displacement device; wherein:
one end of the track assembly is fixed on the first hidden cover beam, the other end of the track assembly extends along the length direction of the small prefabricated box beams, and the track assembly is provided with a gap communicated with a gap between every two adjacent small prefabricated box beams;
the translatable suspension mechanism comprises a movable trolley capable of translating along the track assembly and a suspension mechanism with a fixed end fixed on the movable trolley; the actuating end of the suspension mechanism can sequentially penetrate through a gap of the track assembly and a gap between two adjacent prefabricated small box girders and then is fixed with a girder middle beam section or a W-shaped truss below the first hidden cover beam;
the horizontal shifting device is fixed on the second hidden cover beam, and the power output end of the horizontal shifting device is fixed with the movable trolley through a traction part;
the movable trolley can translate along the track assembly under the power action of the horizontal displacement device and the traction of the traction part.
2. The movable dismounting and hoisting tool for the temporary support system of the road bridge prefabricated small box girder hidden cover beam as claimed in claim 1, wherein the rail assembly comprises a movable rail; one end of the movable track in the bridge direction is positioned above the first hidden cover beam, and the other end of the movable track is divided into two sub tracks with gaps along the bridge direction, namely a first sub track and a second sub track;
the first sub-track and the second sub-track are laid along two adjacent prefabricated small box girders, and track pad girders are arranged between the first sub-track and the second sub-track and the corresponding prefabricated small box girders respectively.
3. The movable dismounting and hoisting tool for the temporary supporting system of the road and bridge precast small box girder hidden cover girder according to claim 2, wherein the movable trolley comprises a supporting girder and a foundation girder; the foundation girders are provided with two, namely a foundation girder a and a foundation girder b;
the supporting girder is arranged across the first sub-rail and the second sub-rail; and the two ends of the supporting girder are respectively fixed with one end of the foundation girder a and one end of the foundation girder b in a one-to-one correspondence manner,
the other end of the foundation girder a and the other end of the foundation girder b are respectively arranged above the first sub-rail and the second sub-rail through rollers matched with the rail assemblies;
the suspension mechanism comprises an electric hoist and a suspension steel wire rope connected with the power output end of the electric hoist;
the electric hoist is fixed at the middle position of the supporting girder, and the end part of the suspension steel wire rope sequentially passes through a gap between the first sub rail and the second sub rail and a gap between two adjacent prefabricated small box girders and then is fixed with the girder middle beam section or the W-shaped truss below the first hidden cover beam.
4. The movable type dismounting and hoisting tool for the temporary supporting system of the road and bridge prefabricated small box girder hidden cover beam as claimed in claim 3, wherein the traction part is a traction steel bundle.
5. The movable dismounting and hoisting tool for the temporary support system of the road and bridge prefabricated small box girder hidden cover beam as claimed in claim 4, wherein the horizontal shifting device comprises a power mechanism, and the output end of the power mechanism is fixed with the movable trolley through a traction steel beam; the power mechanism is arranged in the range of the second hidden cover beam through the reaction frame assembly.
6. The movable type dismounting and hoisting tool for the temporary support system of the road and bridge prefabricated small box girder hidden cover beam as claimed in claim 5, wherein the power mechanism is a continuous jack, and the continuous jack is fixed above the second hidden cover beam through a counterforce frame assembly.
7. The movable dismounting and hoisting tool for the temporary support system of the road and bridge precast small box girder hidden cover beam as claimed in claim 5, wherein the reaction frame assembly comprises a jack support beam, a hand-operated block, a reaction support and an anchoring screw;
the upper end of the counter-force support is provided with a jack support beam, and the lower end of the counter-force support is anchored with the second hidden cover beam through an anchoring screw rod;
the hand hoist supporting beam is fixed with the jack supporting beam;
the fixed end of the hand hoist is fixed with the hand hoist supporting beam, and the actuating end of the hand hoist is fixed with the fixed end of the continuous jack.
8. The movable dismounting and hoisting tool for the temporary support system of the road and bridge precast small box girder hidden cover beam as claimed in claim 7, wherein the two ends of the jack support beam are symmetrically provided with the hand hoist support beams; the hand hoist can be fixed with any one of the hand hoist supporting beams at the two ends of the jack supporting beam.
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| CN201921768674.0U CN212052327U (en) | 2019-10-21 | 2019-10-21 | Movable type dismounting and hoisting tool for temporary supporting system of small box girder type hidden cover beam of road and bridge prefabrication |
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| CN201921768674.0U CN212052327U (en) | 2019-10-21 | 2019-10-21 | Movable type dismounting and hoisting tool for temporary supporting system of small box girder type hidden cover beam of road and bridge prefabrication |
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| CN212052327U true CN212052327U (en) | 2020-12-01 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021078310A1 (en) * | 2019-10-21 | 2021-04-29 | 宁波市政工程建设集团股份有限公司 | Method for removal of temporary support system for road bridge pre-fabricated small box girder-type concealed bent cap, and equipment therefor |
| WO2021078309A1 (en) * | 2019-10-21 | 2021-04-29 | 宁波市政工程建设集团股份有限公司 | Temporary support system for road bridge pre-fabricated small box girder-type concealed bent cap, and method of constructing same |
| CN113512932A (en) * | 2021-03-19 | 2021-10-19 | 宁波市政工程建设集团股份有限公司 | Prestressed steel beam connected prefabricated small box girder type hidden cover beam and construction method thereof |
| CN114427199A (en) * | 2022-02-28 | 2022-05-03 | 中建五局第三建设有限公司 | Excavation-free mechanized construction method for mountain pedestrian footpath |
| CN115404779A (en) * | 2022-07-25 | 2022-11-29 | 中铁十一局集团有限公司 | Prefabricated small box girder type hidden cover beam supporting system and construction method thereof |
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2019
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021078310A1 (en) * | 2019-10-21 | 2021-04-29 | 宁波市政工程建设集团股份有限公司 | Method for removal of temporary support system for road bridge pre-fabricated small box girder-type concealed bent cap, and equipment therefor |
| WO2021078309A1 (en) * | 2019-10-21 | 2021-04-29 | 宁波市政工程建设集团股份有限公司 | Temporary support system for road bridge pre-fabricated small box girder-type concealed bent cap, and method of constructing same |
| US11578465B2 (en) | 2019-10-21 | 2023-02-14 | Ningbo Municipal Engineering Construction Group Co., Ltd. | Temporary support system for road bridge pre-fabricated small box girder-type concealed bent cap, and method of constructing same |
| US11634877B2 (en) | 2019-10-21 | 2023-04-25 | Ningbo Municipal Engineering Construction Group Co., Ltd. | Method for removal of temporary support system for road bridge pre-fabricated small box girder-type concealed bent cap, and equipment therefor |
| CN113512932A (en) * | 2021-03-19 | 2021-10-19 | 宁波市政工程建设集团股份有限公司 | Prestressed steel beam connected prefabricated small box girder type hidden cover beam and construction method thereof |
| CN114427199A (en) * | 2022-02-28 | 2022-05-03 | 中建五局第三建设有限公司 | Excavation-free mechanized construction method for mountain pedestrian footpath |
| CN115404779A (en) * | 2022-07-25 | 2022-11-29 | 中铁十一局集团有限公司 | Prefabricated small box girder type hidden cover beam supporting system and construction method thereof |
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