CN213233105U - Small-span concrete cast-in-place box girder support system - Google Patents
Small-span concrete cast-in-place box girder support system Download PDFInfo
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- CN213233105U CN213233105U CN202021249014.4U CN202021249014U CN213233105U CN 213233105 U CN213233105 U CN 213233105U CN 202021249014 U CN202021249014 U CN 202021249014U CN 213233105 U CN213233105 U CN 213233105U
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Abstract
The utility model relates to a cast-in-place case roof beam support system of little stride footpath concrete, including setting up bailey frame structure between the cushion cap stand and a plurality of steel stands that are used for supporting bailey frame structure, bailey frame structure top is provided with unloads device and cast-in-place beam template, bailey frame structure includes a plurality of bailey beam foundations and the bailey beam of a plurality of groups fixed connection in proper order of transversely setting up on bailey beam foundation, steel stand top and bailey beam foundation connection still are in including transversely setting up a plurality of groups spandrel girder, a plurality of groups of steel stand bottom the tip of bearing beam directly sets up at the cushion cap top surface through two basic I-steel that vertically set up. The utility model discloses need not the ground and handle, can set up fast under complicated geological conditions, pull out support convenient and fast, the safe risk is low, labour saving and time saving, circulated use saves the cost.
Description
Technical Field
The utility model relates to a bridge construction technical field specifically indicates a cast-in-place case roof beam support system of little stride footpath concrete.
Background
At present, with the continuous acceleration of urban infrastructure steps, the engineering design styles of urban elevated or highway bridges are various. The cast-in-place concrete bridge is an important component of bridge construction, however, foundation treatment of the full cast-in-place beam support is always an important link influencing engineering construction, the foundation treatment is labor-consuming and time-consuming, meanwhile, the quality of the foundation treatment is directly related to the overall quality of the cast-in-place beam, a large amount of long-time aloft work is performed when the support is erected, and the possibility of aloft work safety production accidents is increased. The existing cast-in-place box girder support needs to be treated by a foundation mostly before being erected, the problems of high quality requirement and high treatment risk exist in the treatment of complex terrain and ground conditions, and the construction progress is influenced due to the fact that a plurality of parts are arranged when the erected support is pulled out.
SUMMERY OF THE UTILITY MODEL
The utility model discloses be exactly to prior art not enough, provide one kind and need not ground treatment, can set up fast under complicated geological conditions, pull out support convenient and fast, the safe risk is low, labour saving and time saving, circulated use, the cast-in-place case roof beam support system of little stride of cost-effective concrete.
In order to solve the problem, the utility model discloses a cast-in-place case roof beam mounting system of little stride footpath concrete, including setting up bailey truss structure between the cushion cap stand and a plurality of steel stands that are used for supporting bailey truss structure, bailey truss structure top is provided with unloads device and cast-in-place beam template, bailey truss structure includes a plurality of bailey beam foundations and the bailey beam of a plurality of groups fixed connection in proper order that transversely sets up on bailey beam foundation, steel stand top and bailey beam foundation connection still are in including transversely setting up a plurality of groups spandrel girder, a plurality of groups of steel stand bottom the tip of bearing beam directly sets up at the cushion cap top surface through the basic steel of two vertical settings.
Furthermore, a plurality of batten cross beams arranged at intervals are longitudinally arranged at the top of the bailey truss structure, the unloading device comprises a plurality of telescopic rods arranged on the batten cross beams, the bottom of the cast-in-situ beam formwork is fixedly connected with the tops of the telescopic rods, and the cast-in-situ beam formwork is provided with unloading holes convenient to unload. The batten beams are uniformly arranged on the Bailey beam at intervals of 15-50cm, a plurality of telescopic rods are fixedly arranged on the batten beams, the extension and retraction are realized through hydraulic pressure, screw rods or electric control and the like, the cast-in-place beam template is fixedly connected with the telescopic rods, the ground elevation of the cast-in-place beam template can be adjusted by adjusting the extension lengths of the telescopic rods, the cast-in-place beam template is convenient to recycle and save cost, and the cast-in-place beam template can be firstly unloaded by several centimeters when being unloaded, so that the cast-in-place beam template is separated from the concrete on the bottom surface of the cast-in-place beam, a space is provided.
Further, the cushion cap top surface is provided with the steel sheet that prevents basic I-steel from causing the damage to it, basic I-steel and steel sheet fixed connection. A steel plate with the thickness of 10-20mm is laid on the top surface of the bearing platform with the concrete strength of 100%, so that damage to the concrete surface due to the fact that the foundation I-steel directly contacts the top surface of the bearing platform is prevented, the foundation I-steel can be connected with the steel plate through punching or welded through anchor ears, and the foundation I-steel is prevented from slipping under stress.
Furthermore, each group of bearing beams are double-spliced Bailey beams which are transversely connected, the steel upright posts are connected with the double-spliced Bailey beams through flange plates, and the length of the double-spliced Bailey beams is the same as the span of the cast-in-place box beam. The double-spliced Bailey beam is used as a bearing beam, a group of double-spliced structures are formed by transversely connecting two groups of Bailey beams so as to share partial force of the Bailey frame structure, deformation quantity is small after stress is applied, the frame body is convenient to erect, load capacity is large, the Bailey frame can be combined into a whole, the Bailey frame is integrally moved out during disassembly, disassembly and assembly are convenient, length combination can be carried out according to needs, recycling is realized, and practicability is high.
Further, the base of the Bailey beam is a transverse distribution beam with an I-shaped section, and the top surface of the steel upright post is provided with a groove for placing the transverse distribution beam. The groove on the top surface of the steel upright post is used for limiting the transverse distribution beam, the stability of the Bailey truss structure, the unloading device on the Bailey truss structure and the cast-in-place beam template is ensured, and when the truss system is disassembled, the truss system can be divided into an upper part and a lower part from the Bailey truss structure to be respectively disassembled, the cast-in-place beam template is firstly unloaded by several centimeters when the cast-in-place beam template is unloaded, so that the cast-in-place beam template is separated from the concrete on the bottom surface of the cast-in-place beam, a space is provided for unloading the whole truss system, the Bailey truss structure is integrally lifted by a jack to be separated from the steel upright post, the steel upright post and the bearing beam are gradually disassembled, then the steel wire rope is released to unload the Bailey truss structure and the structures on the Bailey truss structure, the disassembling scattered.
Advantageous effects
1. The utility model discloses to the construction area of ground processing difficulty (like river or mucky soil layer), directly adopt the scene to construct the bridge cushion cap that accomplishes and satisfy the designing requirement as the impetus of whole support system, provide the support of support system through setting up basic I-steel, can save the link of ground processing to guarantee cast-in-place roof beam's normal construction, saved manpower and cost.
2. The utility model discloses a material installation dismantle convenient and fast, and convenient transportation of beiLei roof beam and combination, but the cast-in-place roof beam template elevation of device's extending structure that unloads can be adjusted as required, can drop into manifold cycles and use once, reduce the material loss.
3. The utility model discloses a partial support is whole to be unloaded, turns into ground operation and mechanized operation with a large amount of high altitude construction and manual operation, has reduced the time that personnel exposed in the hazardous environment to the safety risk has been reduced.
4. The utility model discloses a support system make full use of characteristics that deformation volume is little after the material atress such as beiLei piece, steel pipe, more simple when to support body atress analysis, the technical degree of difficulty is little.
Drawings
Fig. 1 is a vertical view of the overall structure of the present invention.
Fig. 2 is a sectional view a-a in fig. 1.
Reference numerals: the method comprises the following steps of 1-steel plate, 2-foundation I-steel, 3-double-spliced Bailey beam, 4-steel upright post, 5-transverse distribution beam, 6-Bailey beam, 7-batten beam, 8-unloading device and 9-cast-in-place beam template.
Detailed Description
The invention will be described in further detail with reference to the following figures and specific embodiments:
the small-span concrete cast-in-place box girder support system shown in the figure comprises a Bailey truss structure arranged between bearing platform stand columns and a plurality of steel stand columns 4 used for supporting the Bailey truss structure, wherein the top of the Bailey truss structure is provided with an unloading device 8 and a cast-in-place girder template 9, the Bailey truss structure comprises a plurality of Bailey girder foundations and a plurality of groups of Bailey girders 6 which are transversely arranged on the Bailey girder foundations and fixedly connected in sequence, the top of each steel stand column 4 is connected with the Bailey girder foundations, the small-span concrete cast-in-place box girder support system also comprises a plurality of groups of bearing girders transversely arranged at the bottoms of the steel stand columns 4, and the end parts of the plurality of groups of bearing girders are directly arranged on the top surfaces of the bearing. Preferably, the length of the basic I-shaped steel is 0.6-1.5m larger than the projection width of the box girder, the steel upright posts are made of national standard seamless steel pipes, the diameter of each steel pipe is determined by stress calculation according to the dead weight and the distance of the box girder, and the height is the difference between the height of the bottom surface of the box girder and the height of the box girder minus the Bailey truss structure, the unloading device and the bearing girder. The utility model discloses to the construction area of ground processing difficulty (such as river or mucky soil layer), directly adopt the bridge cushion cap that the on-the-spot has been under construction and satisfies the design requirement as the impetus of whole support system, provide the support of support system through setting up basic I-steel, can save the link of ground processing to guarantee cast-in-place roof beam's normal construction, saved manpower and cost; the utility model adopts the materials which are convenient and rapid to install and disassemble, the Bailey beams are convenient to transport and combine, the telescopic structure of the unloading device can adjust the elevation of the cast-in-situ beam template according to the needs, and the materials can be put into recycling use for many times once, thereby reducing the material loss; the utility model adopts the integral unloading of part of the bracket, converts a large amount of high-altitude operation and manual operation into ground operation and mechanical operation, and reduces the time of exposing personnel in dangerous environment, thereby reducing the safety risk; the utility model discloses a support system make full use of characteristics that deformation volume is little after the material atress such as beiLei piece, steel pipe, more simple when to support body atress analysis, the technical degree of difficulty is little.
Preferably, a plurality of batten beams 7 arranged at intervals are longitudinally arranged at the top of the bailey truss structure, the unloading device 8 comprises a plurality of telescopic rods arranged on the batten beams 7, the bottom of the cast-in-situ beam formwork 9 is fixedly connected with the tops of the telescopic rods, and the cast-in-situ beam formwork 9 is provided with unloading holes convenient to unload. The method is characterized in that the optimized flitch cross beams are uniformly arranged on the Bailey beam at intervals of 15-50cm, a layer of fixed template is fixed on the flitch beam through iron nails, a plurality of telescopic rods are arranged on the fixed template, the telescopic rods can realize the telescopic action through hydraulic pressure, screw rods or electric control and the like, the cast-in-place beam template is fixedly connected with the telescopic rods, the extension length of the telescopic rods can be adjusted to adjust the ground elevation of the cast-in-place beam template, the recycling is convenient, the cost is saved, the cast-in-place beam template can be firstly unloaded by several centimeters during unloading, the cast-in-place beam template is separated from the concrete on the bottom surface of the cast-in-place beam.
Preferably, the top surface of the bearing platform is provided with a steel plate 1 for preventing the base I-steel 2 from damaging the base I-steel, and the base I-steel 2 is fixedly connected with the steel plate 1. A steel plate with the thickness of 10-20mm is laid on the top surface of the bearing platform with the concrete strength of 100%, so that damage to the concrete surface due to the fact that the foundation I-steel directly contacts the top surface of the bearing platform is prevented, the foundation I-steel can be connected with the steel plate through punching or welded through anchor ears, and the foundation I-steel is prevented from slipping under stress.
Preferably, each bearing beam is provided with a transversely connected double-spliced Bailey beam 3, the steel upright 4 is connected with the double-spliced Bailey beam 3 through a flange plate, and the length of the double-spliced Bailey beam 3 is the same as the span of the cast-in-place box beam. The double-spliced Bailey beam is used as a bearing beam, a group of double-spliced structures are formed by transversely connecting two groups of Bailey beams so as to share partial force of the Bailey frame structure, deformation quantity is small after stress is applied, the frame body is convenient to erect, load capacity is large, the Bailey frame can be combined into a whole, the Bailey frame is integrally moved out during disassembly, disassembly and assembly are convenient, length combination can be carried out according to needs, recycling is realized, and practicability is high.
Preferably, the base of the Bailey beam is a transverse distribution beam 5 with an I-shaped section, and the top surface of the steel upright post 4 is provided with a groove for placing the transverse distribution beam 5. The groove on the top surface of the steel upright post is used for limiting the transverse distribution beam, the stability of the Bailey truss structure, the unloading device on the Bailey truss structure and the cast-in-place beam template is ensured, and when the truss system is disassembled, the truss system can be divided into an upper part and a lower part from the Bailey truss structure to be respectively disassembled, the cast-in-place beam template is firstly unloaded by several centimeters when the cast-in-place beam template is unloaded, so that the cast-in-place beam template is separated from the concrete on the bottom surface of the cast-in-place beam, a space is provided for unloading the whole truss system, the Bailey truss structure is integrally lifted by a jack to be separated from the steel upright post, the steel upright post and the bearing beam are gradually disassembled, then the steel wire rope is released to unload the Bailey truss structure and the structures on the Bailey truss structure, the disassembling scattered.
When the utility model is installed, firstly, the projection area of the concrete cast-in-place box girder is measured and paid off according to the design of a construction drawing, and the positions and the structural sizes of a box girder bottom plate, a wing plate, an end beam and a middle beam are accurately marked; calculating the specific position of the span of the box girder, the positions of the two ends of the girder projected on the bearing platform, and marking; laying a steel plate, transiting the mark on the bearing platform onto the steel plate to be used as a strip-shaped base center line of the bracket system, laying a base I-shaped steel along the line, and fixing the base I-shaped steel and the steel plate; the method comprises the steps of pre-assembling double-spliced Bailey beams, vertically placing the double-spliced Bailey beams on adjacent basic I-beams at intervals, arranging and connecting steel stand columns along the double-spliced Bailey beams, leveling, placing transverse distribution beams perpendicular to the double-spliced Bailey beams in grooves of the steel stand columns, arranging the pre-assembled Bailey beams in the direction consistent with the direction of the double-spliced Bailey beams, arranging a plurality of batten cross beams on the Bailey beams, fixing the batten cross beams into a whole through fixing templates, arranging a discharging device and a cast-in-place beam template, and constructing after L/2 and pre-embedding discharging holes for discharging a frame body at the beam end.
After construction is finished, when a form removal condition is met, a cast-in-place box beam formwork bottom is opened with a discharging hole to penetrate a steel wire rope, and the cast-in-place beam formwork is discharged by a discharging device for several centimeters so as to be separated from beam bottom surface concrete, so that an operation space is provided for discharging the whole support system; and placing a plurality of linked jacks on the top surface of the bridge for synchronous operation, firstly lifting the whole of the above part of the Bailey truss structure, gradually removing the steel upright posts and the bearing beams, storing the discharged materials in a classified and concentrated manner, and synchronously releasing the steel wire ropes to discharge the rest of cast-in-situ beam templates, the discharging devices and the Bailey truss structure.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a cast-in-place case roof beam support system of little stride footpath concrete, is including setting up bailey truss structure between the cushion cap stand and a plurality of steel stand (4) that are used for supporting bailey truss structure, bailey truss structure top is provided with unloads device (8) and cast-in-place beam template (9), bailey truss structure includes a plurality of bailey beam foundations and transversely sets up bailey beam (6) of a plurality of groups fixed connection in proper order on bailey beam foundation, steel stand (4) top and bailey beam foundation connection, its characterized in that: the bearing beam is characterized by further comprising a plurality of groups of bearing beams transversely arranged at the bottoms of the steel upright posts (4), wherein the end parts of the bearing beams are directly arranged on the top surface of the bearing platform through two longitudinally arranged basic I-shaped steels (2).
2. The small-span concrete cast-in-place box beam support system according to claim 1, characterized in that: the novel casting device is characterized in that a plurality of batten cross beams (7) which are arranged at intervals are longitudinally arranged at the top of the bailey truss structure, the unloading device (8) comprises a plurality of telescopic rods arranged on the batten cross beams (7), the bottom of the cast-in-situ beam formwork (9) is fixedly connected with the tops of the telescopic rods, and the cast-in-situ beam formwork (9) is provided with unloading holes which are convenient to unload.
3. The small-span concrete cast-in-place box beam support system according to claim 1 or 2, characterized in that: the bearing platform top surface is provided with steel plate (1) that prevents basic I-steel (2) from causing the damage to it, basic I-steel (2) and steel plate (1) fixed connection.
4. The small-span concrete cast-in-place box beam support system according to claim 1 or 2, characterized in that: each group of bearing beam is a double-spliced Bailey beam (3) provided with transverse connection, the steel upright post (4) is connected with the double-spliced Bailey beam (3) through a flange plate, and the length of the double-spliced Bailey beam (3) is the same as the span of the cast-in-place box beam.
5. The small-span concrete cast-in-place box beam support system according to claim 1 or 2, characterized in that: the Bailey beam is characterized in that the Bailey beam foundation is a transverse distribution beam (5) with an I-shaped section, and the top surface of the steel upright post (4) is provided with a groove for placing the transverse distribution beam (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021249014.4U CN213233105U (en) | 2020-06-30 | 2020-06-30 | Small-span concrete cast-in-place box girder support system |
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| CN202021249014.4U CN213233105U (en) | 2020-06-30 | 2020-06-30 | Small-span concrete cast-in-place box girder support system |
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| CN213233105U true CN213233105U (en) | 2021-05-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023066091A1 (en) * | 2021-10-20 | 2023-04-27 | 中建科工集团有限公司 | Support device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023066091A1 (en) * | 2021-10-20 | 2023-04-27 | 中建科工集团有限公司 | Support device |
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