CN210420902U - Concrete box girder flange plate cutting and dismantling stabilizing device - Google Patents
Concrete box girder flange plate cutting and dismantling stabilizing device Download PDFInfo
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- CN210420902U CN210420902U CN201920914334.8U CN201920914334U CN210420902U CN 210420902 U CN210420902 U CN 210420902U CN 201920914334 U CN201920914334 U CN 201920914334U CN 210420902 U CN210420902 U CN 210420902U
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Abstract
The utility model provides a concrete box girder flange plate cutting and dismantling stabilizing device, which comprises a bottom frame, a cantilever truss girder and a suspension system, wherein the middle part of the cantilever truss girder is connected with the box girder through the bottom frame, and the two sides of the cantilever truss girder are connected with the flange plate through the suspension system; and a sliding system is arranged between the underframe and the box girder. The utility model discloses cut concrete anticollision barrier and flange board as whole and demolish, adopt the cross bridge to the piecemeal, in the same direction as the bridge to the segmentation to adopt the construction process of demolising that the cutting steady rest is firm, cutting machine cutting, flange board are transferred and are transported, have that the suitability is strong, economic nature is good, energy-efficient, green's advantage.
Description
Technical Field
The utility model belongs to the technical field of the construction is demolishd to the ramp, concretely relates to stabilising arrangement is demolishd in cutting of concrete box girder flange board.
Background
With the rapid development of national economy and traffic industry, some bridges cannot meet the existing traffic use requirements, or the structures have problems due to the fact that the technology, materials and management levels are lagged behind in the prior construction process, and the bridges need to be dismantled and rebuilt.
The existing bridge demolition method can be mainly divided into blasting demolition and static cutting demolition. Blasting demolition is more limited by environment, and particularly, bridges crossing highways, railways and navigation channels and bridges in downtown areas often do not have blasting demolition conditions. The static cutting and dismantling is that according to the hoisting capacity of the hoisting equipment, the bridge structure is cut into small blocks which are easy to put down in a blocking mode by using the cutting equipment, and then the small blocks are hoisted and dismantled. In the field of static cutting and block dismantling of bridges, a large number of temporary supports are often required to be erected to divide an original bridge into a plurality of small blocks for cutting and dismantling in consideration of safety and structural system change, however, the construction of an urban viaduct is different from the construction of a common bridge, the construction site of the urban viaduct is often located in a busy urban area, the traffic is busy, schools, residences, commercial areas and the like are arranged around the urban viaduct, and therefore construction is often limited by a plurality of factors. The large-scale hoisting equipment cannot be used due to the restriction of the field, the hoisting weight and the size of a hoisted object are limited, and the transportation of a large-segment box girder in a city is difficult; the traffic is limited, and a certain traffic requirement needs to be met during construction; the construction speed is required to be high due to the limitation of the construction period.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a stabilising arrangement is demolishd in cutting of concrete box girder flange board to overcome above-mentioned technical defect.
For solving the technical problem, the utility model discloses the technical scheme who adopts as follows:
a cutting and dismantling stabilizing device for a concrete box girder flange plate is arranged on a box girder and comprises a bottom frame, a cantilever truss girder and a suspension system, wherein the middle part of the cantilever truss girder is connected with the box girder through the bottom frame, and two sides of the cantilever truss girder are connected with the flange plate through the suspension system; and a sliding system is arranged between the underframe and the box girder.
Further, the system that slides includes the averager and slides the track, the track that slides sets up in the top of case roof beam along bridge longitudinal direction, and the averager is fixed in on the chassis to can slide along the track that slides.
Furthermore, the top of the underframe is connected with the cantilever truss girder, and the two ends of the bottom of the underframe are respectively connected with the box girder through pull rods and fastened through first anchor bolts.
Further, the chassis include last chord member and parallel arrangement in the lower chord member of last chord member below, be provided with a plurality of montants between last chord member and the lower chord member perpendicularly, connect through the down tube between a plurality of montant interval distribution and the adjacent montant, the slope opposite direction of adjacent down tube.
Furthermore, the upper chord is connected with the cantilever truss girder through double I-shaped steel; the vertical rods are respectively connected with the upper chord and the lower chord through double I-shaped steel; the shifter is arranged below the lower chord.
Furthermore, a connecting rod is welded between the vertical rods at the end parts of the two ends of the underframe and the cantilever truss girder.
Further, the suspension system includes 4 jibs, and 4 jibs symmetry respectively set up in the both sides of cantilever truss girder, just the upper end of jib is fixed on the cantilever truss girder through second anchor bolt, and the lower extreme of jib is connected with the flange board through third anchor bolt.
The concrete box girder flange plate cutting and dismantling method adopts the construction processes of stabilizing the cutting and dismantling stabilizing device, cutting by the cutting machine and transporting the flange plate.
A method for cutting and dismantling a flange plate of a concrete box girder comprises the following steps,
s1, removing the block division: drawing a cutting transverse line and a cutting longitudinal line on the box girder by adopting the principles of transverse bridge direction blocking and longitudinal bridge direction sectioning;
s2, drilling: drilling a pull rod hole of the bottom frame, a lifting hole of the flange plate and an anchoring hole of the cutting and dismantling stabilizing device according to the gravity center position;
s3, assembling, cutting and dismantling the stabilizing device: firstly hoisting an underframe, aligning a pull rod hole formed in the lower end of the underframe with an anchoring hole formed in a box girder, penetrating a pull rod from bottom to top, and fastening by using a first anchoring bolt; then welding and installing a cantilever truss girder at the upper end of the underframe, and finally installing a suspension system;
s4, cutting by a cutting machine: after the cutting and dismantling stabilizing device is installed, the pull rod is properly pre-tightened, meanwhile, a steel wire rope penetrates into the lifting hole of the flange plate, then the flange plate is cut by using a cutting machine, and during cutting operation, the transverse bridge-direction cutting seam is cut firstly, and then the longitudinal bridge-direction cutting seam is cut;
s5, allocating and transporting the flange plates: after the flange plate is cut off from the box body, the flange plate is lifted to a specified place by a crane to be broken and cleaned;
s6, cutting, dismantling and sliding the stabilizing device: and after the flange plate is removed, removing the first anchoring bolt at the bottom of the underframe, and moving the cutting removal stabilizing device to the next removal section along the sliding track through the shifter.
Further, the principle of transverse bridge direction blocking in the step S1 means that the box girders are transversely blocked according to the number of box girder boxes, each box girder box is a block, and a cutting transverse line is drawn between the concrete guardrail and the box girder; the principle of longitudinal bridge direction segmentation means that a longitudinal cutting line is determined along the longitudinal direction of a bridge according to the hoisting capacity of an on-site crane, the span and the arrangement condition of a pier position.
The utility model has the advantages as follows:
1. the applicability is strong: the utility model discloses a vertical segmentation can reduce the requirement to lifting by crane the ability to lifting device with horizontal piecemeal, has reduced the degree of difficulty of big section transportation, and it is narrow and small more to be fit for the bridge span construction space, demolishs of the complicated concrete box girder flange board of construction site surrounding environment.
2. Good economical efficiency: the utility model hoists and removes the flange plates in large blocks, has less cutting amount and can greatly save the cost investment; and the cutting and dismantling stabilizing device can slide along the longitudinal direction of the bridge through the shifter and can be continuously used, so that the equipment investment is reduced.
3. High-efficiency and energy-saving: the utility model discloses a stabilising arrangement is demolishd in cutting adopts shaped steel integrated configuration, and most manufacturing process is accomplished at the mill, only assembles at the scene, but furthest reduces the time of site operation, takes to tear open the convenience to but cyclic utilization has energy-efficient characteristics.
4. Green and environment-friendly: the utility model discloses a method, the work progress is pollution-free, and the mechanical equipment noise is little, and is little to the surrounding environment influence.
Drawings
FIG. 1 is a schematic cross-bridge layout of a cutting and dismantling stabilizing device;
FIG. 2 is a schematic longitudinal bridging layout of the cutting and dismantling stabilizer;
description of reference numerals:
1. the box girder, 2, flange plate, 3, underframe, 3.1, upper chord, 3.2, lower chord, 3.3, montant, 3.4, down tube, 4, cantilever truss girder, 5, jib, 6, first anchor bolt, 7, second anchor bolt, 8, third anchor bolt, 9, pull rod, 10, glider, 11, slide rail, 12, connecting rod.
Detailed Description
The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein.
It is noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, which, however, may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments presented in the accompanying drawings is not intended to be limiting of the invention.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Example 1
As shown in fig. 1, a cutting and dismantling stabilizing device for a concrete box girder flange plate is arranged on a box girder 1 and comprises a chassis 3, a cantilever truss girder 4 and a suspension system, wherein the middle part of the cantilever truss girder 4 is connected with the box girder 1 through the chassis 3, and two sides of the cantilever truss girder 4 are connected with the flange plate 2 through the suspension system; and a sliding system is arranged between the underframe 3 and the box girder 1.
The utility model discloses cut concrete anticollision barrier and flange board as whole and demolish, the cross bridge is to the piecemeal, in the same direction as the bridge to the segmentation, adopts the construction process of demolising that the cutting steady rest is firm, cutting machine cutting, flange board transfer, and the construction is demolishd to the upstream side ramp guardrail and flange board and is gone on simultaneously, according to the order from high to low, a left and right symmetry, strides towards the side of approach bridge from the main bridge side and demolishs.
Example 2
On the basis of the above embodiment, further, the sliding system includes a shifter and a sliding rail, the sliding rail is arranged on the top of the box girder along the longitudinal direction of the bridge, and the shifter is fixed on the underframe and can slide along the sliding rail. The flange board is demolishd and is accomplished the back, stabilising arrangement accessible shifter slides along the bridge longitudinal direction and moves to next and demolishs the festival section, thereby makes the utility model has the advantages of economic nature is good, controllable in succession.
Example 3
On the basis of the above embodiment, further, the top of the underframe is connected with the cantilever truss girder, and the two ends of the bottom of the underframe are respectively connected with the box girder through the pull rods and fastened through the first anchor bolts.
Further, as shown in fig. 2, the bottom frame includes an upper chord and a lower chord arranged in parallel below the upper chord, a plurality of vertical bars are vertically arranged between the upper chord and the lower chord, the vertical bars are distributed at intervals, adjacent vertical bars are connected by diagonal bars, and the inclination directions of the adjacent diagonal bars are opposite; and a connecting rod is welded between the vertical rod at the end parts of the two ends of the underframe and the cantilever truss girder.
Preferably, the upper chord is connected with the cantilever truss girder through double I-steel; the vertical rods are respectively connected with the upper chord and the lower chord through double I-shaped steel; the shifter is arranged below the lower chord.
Further, the suspension system includes 4 jibs, and 4 jibs symmetry respectively set up in the both sides of cantilever truss girder, just the upper end of jib is fixed on the cantilever truss girder through second anchor bolt, and the lower extreme of jib is connected with the flange board through third anchor bolt.
The hanger rods are made of finish-rolled deformed steel bars, and the flange plates are hung on the cantilever truss girders through anchor backing plates and anchor bolts; the pull rod is also made of finish-rolled deformed steel, and the underframe is fixed on the box girder through the arrangement of the anchor backing plate and the anchor bolt.
The utility model discloses a stabilizer atress is demolishd in cutting the most unfavorable condition does, one side is unloaded, 5.5 m's guardrail and flange board cutting block are hung to one side, consider 1.2 impact coefficient, according to calculating, under the most unfavorable operating condition, cantilever truss girder is connected the position with the chassis and is the most unfavorable point, the biggest bending moment that should locate the girder receives is 106.56kNm, worker 25a shaped steel, W401.6 cm3, then stress is 132.7MPa, satisfy the designing requirement. The worst rod piece of the underframe is an upper chord, the maximum bending moment is 14.4kNm, the H12.6 section steel is manufactured, and the stress is 92.95MPa when the W is 77.46cm3, so that the design requirement is met. Consequently the cutting demolish stabilising arrangement have safe and reliable's characteristics.
Example 4
The utility model relates to a concrete box girder flange plate cutting demolishs method adopts the cutting to demolish the construction process that stabilising arrangement is firm, cutting machine cutting, flange plate transfer.
The method comprises the following steps:
s1, removing the block division: drawing a cutting transverse line and a cutting longitudinal line on the box girder by adopting the principles of transverse bridge direction blocking and longitudinal bridge direction sectioning;
s2, drilling: drilling a pull rod hole of the bottom frame, a lifting hole of the flange plate and an anchoring hole of the cutting and dismantling stabilizing device according to the gravity center position;
s3, assembling, cutting and dismantling the stabilizing device: firstly hoisting an underframe, aligning a pull rod hole formed in the lower end of the underframe with an anchoring hole formed in a box girder, penetrating a pull rod from bottom to top, and fastening by using a first anchoring bolt; then welding and installing a cantilever truss girder at the upper end of the underframe, and finally installing a suspension system;
s4, cutting by a cutting machine: after the cutting and dismantling stabilizing device is installed, the pull rod is properly pre-tightened, meanwhile, a steel wire rope penetrates into the lifting hole of the flange plate, then the flange plate is cut by using a cutting machine, and during cutting operation, the transverse bridge-direction cutting seam is cut firstly, and then the longitudinal bridge-direction cutting seam is cut;
s5, allocating and transporting the flange plates: after the flange plate is cut away from the box body, the crane is in place, the steel wire rope is hoisted, the steel wire rope is slowly tightened, the second anchoring bolt at the upper end of the suspender is separated, the suspender is not stressed, the load of the flange plate is completely borne by the crane, then the third anchoring bolt at the lower end of the suspender is released, and the crane lowers the flange plate to a designated place for removing and cleaning;
s6, cutting, dismantling and sliding the stabilizing device: and after the flange plate is removed, removing the first anchoring bolt at the bottom of the underframe, and moving the cutting removal stabilizing device to the next removal section along the sliding track through the shifter.
Example 5
On the basis of the above embodiment, further, the principle of transverse bridge direction blocking means that the box girders are transversely blocked according to the number of the box girders 1, each box girder is one, and a cutting transverse line is drawn between the concrete guardrail and the box girder; the principle of longitudinal bridge direction segmentation means that a longitudinal cutting line is determined along the longitudinal direction of a bridge according to the hoisting capacity of an on-site crane, the span and the arrangement condition of a pier position.
The utility model discloses a vertical segmentation can reduce the requirement to lifting by crane the ability to lifting device with horizontal piecemeal, has reduced the degree of difficulty of big section transportation, and it is narrow and small more to be fit for the bridge span construction space, demolishs of the complicated concrete box girder flange board of construction site surrounding environment. The utility model discloses the method that adopts, the work progress is pollution-free, and the noise of machine equipment is little, and is little to the surrounding environment influence.
Claims (7)
1. The utility model provides a stabilising arrangement is demolishd in cutting of concrete box girder flange board, should cut and demolish stabilising arrangement and set up on case roof beam (1), its characterized in that: the box girder comprises a chassis (3), a cantilever truss girder (4) and a suspension system, wherein the middle part of the cantilever truss girder (4) is connected with a box girder (1) through the chassis (3), and two sides of the cantilever truss girder (4) are connected with flange plates (2) through the suspension system; and a sliding system is arranged between the underframe (3) and the box girder (1).
2. The concrete box beam flange plate cutting and dismantling stabilizing device as claimed in claim 1, wherein: the sliding system comprises a shifter (10) and a sliding track (11), wherein the sliding track (11) is arranged at the top of the box girder (1) along the longitudinal direction of the bridge, and the shifter (10) is fixed on the bottom frame (3) and can slide along the sliding track (11).
3. The concrete box beam flange plate cutting and dismantling stabilizing device as claimed in claim 1, wherein: the top of the underframe (3) is connected with the cantilever truss girder (4), and the two ends of the bottom of the underframe (3) are respectively connected with the box girder (1) through pull rods (9) and fastened through first anchor bolts (6).
4. The concrete box beam flange plate cutting and dismantling stabilizing device as claimed in claim 2, wherein: chassis (3) including last chord member (3.1) and parallel arrangement in lower chord member (3.2) of last chord member (3.1) below, be provided with a plurality of montants (3.3) between last chord member (3.1) and lower chord member (3.2) perpendicularly, connect through down tube (3.4) between a plurality of montants (3.3) interval distribution and adjacent montant (3.3), the slope opposite direction of adjacent down tube (3.4).
5. The concrete box beam flange plate cutting and dismantling stabilizing device as claimed in claim 4, wherein: the upper chord (3.1) is connected with the cantilever truss girder (4) through double I-shaped steel; the vertical rod (3.3) is respectively connected with the upper chord (3.1) and the lower chord (3.2) through double I-shaped steel; the shifter (10) is arranged below the lower chord (3.2).
6. The concrete box beam flange plate cutting and dismantling stabilizing device as claimed in claim 4, wherein: and a connecting rod (12) is welded between the vertical rod (3.3) at the end parts of the two ends of the underframe (3) and the cantilever truss girder (4).
7. The concrete box beam flange plate cutting and dismantling stabilizing device as claimed in claim 1, wherein: the suspension system comprises 4 suspension rods (5), wherein the 4 suspension rods (5) are symmetrically arranged on two sides of the cantilever truss girder (4) respectively, the upper ends of the suspension rods (5) are fixed on the cantilever truss girder (4) through second anchor bolts (7), and the lower ends of the suspension rods (5) are connected with the flange plates (2) through third anchor bolts (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920914334.8U CN210420902U (en) | 2019-06-18 | 2019-06-18 | Concrete box girder flange plate cutting and dismantling stabilizing device |
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| CN201920914334.8U CN210420902U (en) | 2019-06-18 | 2019-06-18 | Concrete box girder flange plate cutting and dismantling stabilizing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110172929A (en) * | 2019-06-18 | 2019-08-27 | 中交二公局第二工程有限公司 | A kind of concrete box beam flange plate cutting disassembling stabilising arrangement and cutting disassembling method |
| CN111676846A (en) * | 2020-06-10 | 2020-09-18 | 贵州大通路桥工程建设有限公司 | Construction method for dismantling truss type combined arch bridge |
| CN111676845A (en) * | 2020-06-10 | 2020-09-18 | 贵州大通路桥工程建设有限公司 | Construction device for converting arch bridge from arch structure into cantilever structure |
-
2019
- 2019-06-18 CN CN201920914334.8U patent/CN210420902U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110172929A (en) * | 2019-06-18 | 2019-08-27 | 中交二公局第二工程有限公司 | A kind of concrete box beam flange plate cutting disassembling stabilising arrangement and cutting disassembling method |
| CN111676846A (en) * | 2020-06-10 | 2020-09-18 | 贵州大通路桥工程建设有限公司 | Construction method for dismantling truss type combined arch bridge |
| CN111676845A (en) * | 2020-06-10 | 2020-09-18 | 贵州大通路桥工程建设有限公司 | Construction device for converting arch bridge from arch structure into cantilever structure |
| CN111676846B (en) * | 2020-06-10 | 2022-07-22 | 贵州大通路桥工程建设有限公司 | Construction method for dismantling truss type combined arch bridge |
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