CN219342836U - Multi-span cast-in-situ beam movable support structure - Google Patents
Multi-span cast-in-situ beam movable support structure Download PDFInfo
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- CN219342836U CN219342836U CN202222968352.9U CN202222968352U CN219342836U CN 219342836 U CN219342836 U CN 219342836U CN 202222968352 U CN202222968352 U CN 202222968352U CN 219342836 U CN219342836 U CN 219342836U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The utility model relates to a multi-span cast-in-situ beam movable support structure which comprises a bearing truss, a cross beam, longitudinal beams, an anchoring system, a distribution beam, unloading blocks, travelling mechanisms and a jacking mechanism, wherein the cross beam is arranged up and down in parallel, the cross beam is fixedly connected with the lower end of the bearing truss, the lower end of the cross beam positioned at the lower part is fixedly provided with a plurality of travelling mechanisms along the length direction of the cross beam, the lower end of the cross beam is also provided with the jacking mechanism for driving the cross beam to lift, the anchoring system consists of a counter-pull screw rod and a connecting cross beam, a plurality of through holes are formed in a web plate of the cross beam positioned at the upper part at intervals, the connecting cross beam vertically penetrates through the through holes, two ends of the connecting cross beam are respectively connected and fixed with an adjacent movable support structure through the counter-pull screw rod, the bearing truss comprises a steel pipe column arranged vertically, the steel pipe column is fixedly connected with the longitudinal beams to form the bearing truss, the distribution beam is arranged above the bearing truss, and the unloading blocks are supported below the cross beam positioned at the lower part.
Description
Technical Field
The utility model relates to the field of bridge engineering, in particular to a multi-span cast-in-situ beam movable support structure.
Background
With the rapid development of cities, the traffic capacity of the original roads cannot meet the requirement of actual traffic flow, urban road reconstruction becomes a trend of social development, and the urban road reconstruction usually adopts a mode of widening the original roads or building viaducts on the original roads. The viaduct can meet the traffic demands of long distance and high efficiency, promote the development of cities in different dimensions of space and time, and gradually become urban traffic pulse.
The common construction method for the cast-in-situ construction of the girder of the urban viaduct comprises the following steps: hanging basket construction, full framing construction, beam type supporting construction, movable formwork construction and the like. However, due to the construction specificity of the urban reconstruction and expansion viaduct, the method has the characteristics of insufficient construction space, short construction period, high requirements on green and civilized construction and the like, and has high requirements on the selection of the cast-in-situ girder construction process.
The construction period of the cradle construction method is long, and the method is not suitable for bridges with variable section widths; the construction period is long due to the fact that the number of times of the support materials of the full framing construction method and the beam framing construction method is large, and the construction period requirement is difficult to meet; the movable formwork method has the advantages of high design difficulty and high input cost, and is not suitable for bridge construction with variable section height and width. Therefore, the method has important significance in optimizing the form of the bracket for adapting to the construction of reconstructing and expanding the cast-in-situ beam of the urban road.
Disclosure of Invention
In view of the defects of the prior art, the technical problem to be solved by the utility model is to provide the multi-span cast-in-situ beam movable support structure which is reasonable in structure, convenient and efficient.
In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides a multispan cast-in-place roof beam removes supporting structure, includes bears truss, crossbeam, longeron, anchor system, distribution roof beam, off-load piece, running gear and climbing mechanism, parallel arrangement about the crossbeam, bear the truss lower extreme and link firmly the crossbeam, be located the crossbeam lower extreme of lower part and set firmly a plurality of running gear along its length direction, this crossbeam lower extreme still is equipped with the climbing mechanism in order to drive its lift, the anchor system comprises to drawing screw rod and connection stull, is equipped with a plurality of through-holes at intervals on the crossbeam web of upper portion, connect the stull to vertically to wear out the through-hole and both ends are connected fixedly with adjacent removal supporting structure through the drawing screw rod respectively, bear the truss and include the steel pipe stand of vertical setting, steel pipe stand links firmly with the longeron in order to constitute and bears the truss, bear the truss top and be provided with the distribution roof beam, the off-load piece supports in the crossbeam below of lower part.
Furthermore, the single movable support structure is formed by connecting two rows of bearing trusses, and the two rows of bearing trusses are connected into a whole through parallel diagonal bracing.
Further, the distribution beam is placed on the longitudinal beam and is formed by crossing a Bailey beam in the transverse bridge direction and a profile steel in the longitudinal bridge direction.
Furthermore, the unloading block consists of a sand box and an elevation adjusting block so as to support the movable support structure, and is supported below the cross beam during construction, so that upper load is transferred to the foundation, and the effect of adjusting the elevation of the movable support system is simultaneously considered.
Further, running gear includes the walking frame, and the top is connected with the crossbeam through vertical pivot, pivot upper end links firmly with the crossbeam, and the lower extreme is connected with the walking frame rotation, transversely vertically be cross restriction hole has been seted up in the walking frame, offer in the pivot with restriction hole cooperation supply the bolt spacing hole of pegging graft, walking frame bottom rotates and is connected with the truckle, and this truckle rotates through motor drive, and above-mentioned pivot also can be replaced by the bolt, and the bolt upper end is fixed with the crossbeam, and the lower part is connected with the walking frame through the screw thread to insert spacing adjustment advancing direction through the bolt.
Further, the lifting mechanism comprises a jack, the jack is welded on the inner side of the cross beam through a reinforcing plate, and the jack has the functions of system conversion and assisting steering of the travelling mechanism.
Compared with the prior art, the utility model has the following beneficial effects:
1. the lower end of the support structure is provided with the travelling mechanism capable of moving along the forward and transverse directions, so that the support structure has the function of moving bidirectionally, the blocking of the pier column can be effectively avoided in the moving process, the utilization rate of the support structure is improved, and the problems that the common support is excessively large in number of times of assembling and disassembling and cannot be moved are solved;
2. the casting construction of the irregular beam body is realized through the movable bracket, the problem that a hanging basket or other walking brackets cannot adapt to the casting construction of the variable cross section box beam is solved, and the casting construction difficulty of the box beam is reduced;
3. the materials composing the structure of the utility model are easy to purchase and assemble, and the materials can not be recycled because of no need of independently customizing components, thereby reducing the purchase cost.
4. The construction of the project full bridge can be completed only by only once assembling and disassembling the bracket, so that the safety risk of workers at high altitude assembling and disassembling the bracket is reduced, the assembling and disassembling time is saved, and the problem of the tight construction period of the urban reconstruction and expansion project is solved.
The utility model will be described in further detail with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic view of a construction of an embodiment of the present utility model;
FIG. 2 is a cross-sectional view of a mobile carriage structure according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of the connection of the anchor system at the intersection of the bailey beams in an embodiment of the utility model;
FIG. 4 is a schematic view of a walking mechanism according to an embodiment of the present utility model;
FIG. 5 is a schematic view (I) of a construction step according to an embodiment of the present utility model;
FIG. 6 is a schematic view (II) of a construction step structure according to an embodiment of the present utility model;
FIG. 7 is a schematic view (III) of construction steps according to the embodiment of the utility model;
FIG. 8 is a schematic view of construction steps according to the embodiment of the present utility model;
FIG. 9 is a construction diagram (fifth) of the construction steps according to the embodiment of the present utility model;
FIG. 10 is a schematic view (sixth) of the construction step configuration according to the embodiment of the present utility model.
In the figure: the device comprises a 1-bearing truss, a 2-cross beam, a 3-anchoring system, a 4-distribution beam, a 5-unloading block, a 6-travelling mechanism, a 7-lifting mechanism, an 8-steel pipe column, a 9-longitudinal beam, a 31-opposite-pulling screw rod, a 32-connecting cross brace, a 41-bailey beam, a 52-sand box, a 52-elevation adjusting block, a 61-travelling frame, a 62-rotating shaft, a 63-limiting hole, a 64-trundle and a 65-bolt.
Detailed Description
In order to make the above features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below.
In the description of the present utility model, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present utility model.
As shown in fig. 1-10, a multi-span cast-in-situ beam movable support structure comprises a bearing truss 1, a cross beam 2, a longitudinal beam 9, an anchoring system 3, a distribution beam 4, an unloading block 5, a travelling mechanism 6 and a jacking mechanism 7, wherein the cross beam is arranged up and down in parallel, the lower end of the bearing truss is fixedly connected with the cross beam, the lower end of the cross beam positioned at the lower part is fixedly provided with a plurality of travelling mechanisms along the length direction of the cross beam, the lower end of the cross beam is also provided with a jacking mechanism for driving the cross beam to lift, the anchoring system consists of a counter-pull screw 31 and a connecting cross beam 32, a plurality of through holes are formed in a cross beam web positioned at the upper part at intervals along the length direction of the cross beam web, the connecting cross beam vertically penetrates through the through holes, two ends of the connecting cross beam are respectively connected and fixed with an adjacent movable support structure through the counter-pull screw, the bearing truss comprises a steel pipe column 8 which is vertically arranged, the steel pipe column is fixedly connected with the longitudinal beam to form the bearing truss, the distribution beam is arranged above the bearing truss, and the unloading block is supported below the cross beam.
In the embodiment of the utility model, the width of the top surface of the project main bridge box girder is 26m, the length of one span is 30m, the height of the girder is 1.8m, and the total number of one span and three spans is 9. The pier column is a double-column vase pier, and the average height is 9m.
In the embodiment of the utility model, the steel pipe column 8 of the movable support adopts 630mm steel pipes, and the transverse spacing is 4.5m, 6m and 4.5m; the longitudinal spacing of the steel pipe columns 8 is 27m. The bearing truss 1 adopts a 600mm steel pipe, the longitudinal beam 9 of the bearing truss 1 adopts 800mmH steel, and two rows of bearing trusses are welded into a whole through parallel diagonal bracing to form a movable support structure.
In the embodiment of the utility model, the bearing truss is arranged above the cross beam 2, and the cross beam 2 is selected from 500mmH section steel; each walking mechanism 6 is symmetrically welded below the lower cross beam 2, and one walking mechanism consists of a motor and two 750 tires (casters) and has a walking speed of 10m/min. The inner side of the beam 2 is symmetrically welded with 4 jacking mechanisms 7, and a PLC system is adopted to control the travelling mechanism 6 to travel on the ground at a constant speed.
In the embodiment of the utility model, the single movable support structure is formed by connecting two rows of bearing trusses, and the two rows of bearing trusses are connected into a whole through parallel diagonal bracing.
In the embodiment of the utility model, the distribution beam is arranged on the longitudinal beam and is formed by intersecting a bailey beam 41 in the transverse bridge direction and a profile steel in the longitudinal bridge direction.
In the embodiment of the utility model, an M32 screw rod and a No. 45I-steel are longitudinally connected and selected as the anchoring system 3, one span of movable support structure is tied through a web reserved hole of the cross beam 2, and two adjacent longitudinal spans of support structures are integrally connected through the No. 45I-steel; two No. 40 channel steel are selected for transverse connection, and the transverse adjacent support structures are connected into a whole through bolt holes.
In the embodiment of the utility model, the unloading block consists of the sand box 51 and the elevation adjusting block 52 to support the movable bracket structure, and is supported below the cross beam during construction, so that the upper load is transferred to the foundation, and the effect of adjusting the elevation of the movable bracket system is simultaneously considered; after the movable support walks to a preset position, the support is jacked up to the designed elevation of the bridge through the jacking mechanism 7, the support is supported through the sand box and the elevation adjusting block, the transformation of a support system is completed, and the jacking mechanism 7 is retracted.
In the embodiment of the utility model, the distribution beam 4 is arranged above the bearing truss 1, the distribution beam 4 is provided with the bailey beams in the transverse bridge direction, the length of the bailey beams can be adjusted according to different widths of bridges, the bridge is suitable for wide-width bridge construction, the bailey beams in two transverse bracket structures are arranged in a staggered manner, in order to ensure that the bracket structures can bear the whole force, the distribution beam is fixed on the bolt holes of the bailey beams by adopting the pressing plates at the intersection positions, and the bailey beams are connected into a whole. The length of the longitudinal beam 9 can be used for finely adjusting the length of the bridge and is suitable for the installation of the bridge template.
In the embodiment of the utility model, the travelling mechanism comprises a travelling frame 61, the top end of the travelling frame is connected with a cross beam through a vertical rotating shaft 62, the upper end of the rotating shaft is fixedly connected with the cross beam, the lower end of the rotating shaft is rotatably connected with the travelling frame, a cross limiting hole 63 which is transverse and longitudinal is formed in the travelling frame in a penetrating manner, a hole (not shown in the drawing) which is matched with the limiting hole and used for inserting a bolt 65 for limiting is formed in the rotating shaft, a truckle 64 is rotatably connected to the bottom of the travelling frame, the truckle is driven to rotate by a motor, the rotating shaft can be replaced by a bolt, the upper end of the bolt is fixed with the cross beam, and the lower end of the bolt is connected with the travelling frame through threads and is inserted into the limiting hole through the bolt for limiting and adjusting the travelling direction.
In the embodiment of the utility model, the lifting mechanism comprises a jack, the jack is welded on the inner side of the beam through a reinforcing plate, and the jack has the functions of system conversion and assisting steering of the travelling mechanism; the bearing capacity 35t of the single jack and the travel are selected according to the height difference of the terrain, and the travel of 500mm is selected by the on-site measurement of the example so as to adjust the heights of the terrains with different heights.
The construction principle of the embodiment of the utility model is as follows:
s1: according to the width of the bridge, 3 groups of movable support combinations are selected in the single-span transverse bridge direction to construct the cast-in-situ box girder, and 9 groups of movable support structures are needed for three spans.
S2: preparing materials according to the design width of the 9 groups of movable brackets, and welding, assembling and forming on a construction site.
S3: because the project is a reconstruction project, construction is carried out on a road which is already in traffic, foundation conditions are good, and the selected 9 groups of movable support travelling mechanisms 6 can directly travel on the current road, and the three groups of supports are sequentially moved to the designated positions through the travelling mechanisms 6.
S4: after the movable support moves in place, the jacking mechanism 7 descends, the support is jacked to the designed elevation, the unloading block 5 is installed, the jacking mechanism 7 is retracted, the unloading block 5 transmits upper load to the foundation, and finally the movable support is connected into a whole through the anchoring system 3 to bear force together.
S5: after the construction of the cast-in-situ beam is completed and meets the design requirement, the support is jacked up by the descending and jacking mechanism 7, the support is fallen back to the current road after the unloading block 5 is removed, and the template and the concrete are automatically demolded.
S6: the movement of the support is exemplified by a union, and the steps of the movement are as follows, and are matched with the accompanying figures 5-10 of the specification:
after demoulding is completed, the pressing plate above the Bailey beam enables the bracket to freely move, so that the No. 1/2/3 moving bracket can walk 180m along the advancing direction of the road, and the bracket reaches a third joint position to stop;
the No. 4/5/6 movable support transversely moves by about 1lm to ensure that the movable support does not interfere with the bridge pier along the advancing direction of the road, then the movable support is supported by a certain height through the jacking mechanism 7, and then wheels are rotated 180 degrees to change the traveling direction;
moving the No. 4/5/6 moving support forward for 90m along the forward direction of the road to reach the second joint position;
supporting the No. 4/5/6 movable support to a certain height through the jacking mechanism 7, then rotating the traveling mechanism 6 by 180 degrees to change the traveling direction, reversely traversing the No. 4/5/6 movable support by about 11m, and reaching the pouring position of the beam Duan Zhongjian;
the No. 1/2/3 movable support is retracted for 90m along the advancing direction of the road to reach the side pouring position of the second yoke section;
similarly, the No. 7/8/9 movable bracket is moved forward for 90m along the advancing direction to reach the pouring position of the side of the beam Duan Bian;
after all the movable brackets reach the appointed position of the second combined beam section to be poured, the support conversion is carried out by jacking through the jacking mechanism 7, meanwhile, the brackets are adjusted to the designed pouring elevation of the beam section, then the height change block, the unloading block 5 and the anchoring system 3 are additionally arranged, the brackets are connected into a whole, and finally the jacking mechanism 7 is retracted to complete the support conversion.
The utility model is not limited to the above-described preferred embodiments, and any person may derive other various forms of multi-span cast-in-place beam moving support structures in light of the present teachings. All equivalent changes and modifications made according to the claims of the present utility model shall fall within the scope of the present utility model.
Claims (6)
1. A multi-span cast-in-situ beam movable support structure is characterized in that: including bearing truss, crossbeam, longeron, anchoring system, distribution roof beam, off-load piece, running gear and climbing mechanism, parallel arrangement about the crossbeam, bearing truss lower extreme has linked firmly the crossbeam, and the crossbeam lower extreme that is located the lower part has set firmly a plurality of running gear along its length direction, and this crossbeam lower extreme still is equipped with the climbing mechanism in order to drive its lift, anchoring system comprises to drawing screw rod and connection stull, and the interval is equipped with a plurality of through-holes on the crossbeam web of upper portion, connect the stull vertical to wear out the through-hole and both ends are connected fixedly through to drawing screw rod and adjacent removal supporting structure respectively, bearing truss includes the steel pipe stand of vertical setting, steel pipe stand links firmly with the longeron in order to constitute bearing truss, bearing truss top is provided with the distribution roof beam, the off-load piece supports in the crossbeam below of lower part.
2. The multi-span cast-in-place beam moving bracket structure according to claim 1, wherein: each group of movable support structures is formed by connecting two rows of bearing trusses, and the two rows of bearing trusses are connected into a whole through parallel diagonal bracing.
3. The multi-span cast-in-place beam moving bracket structure according to claim 2, wherein: the distribution beam is placed on the longitudinal beam and is formed by crossing a Bailey beam in the transverse bridge direction and a profile steel in the longitudinal bridge direction.
4. The multi-span cast-in-place beam moving bracket structure according to claim 1, wherein: the unloading block consists of a sand box and an elevation adjusting block so as to support the movable support structure.
5. The multi-span cast-in-place beam moving bracket structure according to claim 1, wherein: the running gear includes the walking frame, and the top is connected with the crossbeam through vertical pivot, pivot upper end links firmly with the crossbeam, and the lower extreme rotates with the walking frame to be connected, transversely vertically be crisscross restriction hole has been seted up in the walking frame in the run-through, set up in the pivot with restriction hole cooperation supply the spacing hole of bolt grafting, walking frame bottom rotates and is connected with the truckle, and this truckle rotates through motor drive.
6. The multi-span cast-in-place beam moving bracket structure according to claim 1, wherein: the lifting mechanism comprises a jack, and the jack is welded on the inner side of the cross beam through a reinforcing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222968352.9U CN219342836U (en) | 2022-11-08 | 2022-11-08 | Multi-span cast-in-situ beam movable support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222968352.9U CN219342836U (en) | 2022-11-08 | 2022-11-08 | Multi-span cast-in-situ beam movable support structure |
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| Publication Number | Publication Date |
|---|---|
| CN219342836U true CN219342836U (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222968352.9U Active CN219342836U (en) | 2022-11-08 | 2022-11-08 | Multi-span cast-in-situ beam movable support structure |
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| CN (1) | CN219342836U (en) |
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- 2022-11-08 CN CN202222968352.9U patent/CN219342836U/en active Active
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