CN214831940U - Spacing device of overturning of preventing of bridge aerial working platform braced system - Google Patents
Spacing device of overturning of preventing of bridge aerial working platform braced system Download PDFInfo
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- CN214831940U CN214831940U CN202023223282.1U CN202023223282U CN214831940U CN 214831940 U CN214831940 U CN 214831940U CN 202023223282 U CN202023223282 U CN 202023223282U CN 214831940 U CN214831940 U CN 214831940U
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Abstract
The utility model discloses a spacing anti-overturning device of bridge aerial working platform braced system, wear to establish the excellent of punching on the pier including the level, the jack is vertical places on the channel-section steel of punching excellent top, and the jack top is the platform girder, still including preventing the box that topples, prevent the box that topples and adopt two halves lock to enclose and lock and fix into a rigidity box, cover the main part of jack wherein, the top of jack is passed and is prevented the box top that topples and tightly in platform girder bottom. The anti-overturning box completely wraps the jack and limits the displacement of the jack; in case malfunctioning phenomenon appears in the jack, the platform girder directly falls in the box top of preventing toppling, and rigid box plays the effect of interim support operation platform, reserves the time of fleing for the operation personnel, even the jack takes place to malfunction also can reserve sufficient time and ensure personnel's safe escape, has simple to operate, uses safe and reliable's characteristics.
Description
Technical Field
The utility model relates to an engineering construction technical field, concretely relates to a device for preventing bridge aerial work platform braced system from toppling, and bridge aerial work platform braced system anti-overturning construction method.
Background
As shown in fig. 1, when a bridge lower structural beam and a capping beam are constructed by a traditional process, a core rod 2 horizontally penetrates through a pier 1, a jack 3 is placed on a channel steel 4 above the core rod 2, a platform girder 5 (adopting 45a I-steel) is arranged above the jack 3, a distribution beam and an operation platform are arranged on the platform girder 5, and the distribution beam and the operation platform are supported by the jack 3. The traditional method mainly has the following defects:
(1) when the jack was installed, need to transfer same height with two jacks about, if there is the deviation highly, the platform girder erects the back slope, and the jack has the risk of sliding, causes the atress unbalance finally to lead to braced system to topple, and the installation degree of difficulty is high.
(2) After the jack installation is accomplished, the platform girder is directly erect in the jack top, and jack and platform girder area of contact undersize, the platform girder takes place the focus off normal easily during the installation and drops, has great potential safety hazard, and the installation risk is big.
(3) The platform girder directly lays on the jack, and jack self does not have fixed and stop device, and in case the jack takes place to slide or be out of order, whole operation platform is whole unstability, takes place to topple, and personnel's safety can't guarantee, has increased aerial working's danger coefficient, and the security performance is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a spacing anti-overturning device of bridge aerial working platform braced system has simple to operate, uses safe and reliable's characteristics, can effectively prevent that braced system from toppling.
Therefore, the utility model discloses the technical scheme who adopts does: the utility model provides a spacing anti-overturning device of bridge aerial working platform braced system, wears to establish the excellent of punching on the pier including the level, and the jack is vertical places on the channel-section steel of punching excellent top, and the jack top is the platform girder, still includes the box of preventing toppling, the box of preventing toppling adopts two halves locks to enclose and lock and fix into a rigidity box, covers the main part of jack wherein, and the top of jack is passed the box top of preventing toppling and is tightly in platform girder bottom.
Preferably, the top and the bottom of the overturn-preventing box are open, the cross sections of the two buckled halves are L-shaped and are formed by bending steel plates with the thickness of 10 +/-5 mm, outward flanges are arranged at the buckled positions of the two halves respectively, and the two halves are locked and fixed through fasteners on the outward flanges after being buckled. The material is formed by bending a steel plate with the thickness of 10 +/-5 mm, and has high strength, low cost and simple process.
More preferably, the fastener adopts a first bolt and nut assembly; or the perforated support lug is welded on one of the outward turned edges, the corresponding other outward turned edge is provided with a perforation, and the perforated support lug penetrates through the perforation and is combined with the L-shaped steel bar for locking and fixing.
Further preferably, stagger the setting about two lock positions of preventing the box that topples, the marginal interval L1 of the flanging of two lock positions equals the interior width of channel-section steel for both ends just in time support on the inside wall of channel-section steel through the flanging around preventing the box that topples, and it is spacing to prevent that the box that topples carries out front and back chucking through the channel-section steel, and the installation steadiness is better.
Further preferably, the mounting panel has been welded respectively in the outside about preventing overturning box bottom, the length L2 of mounting panel equals the interior width of channel-section steel for both ends are just in time supported on the inside wall of channel-section steel through the mounting panel around preventing overturning the box, and the mounting panel passes through second bolt and nut subassembly locking to be fixed on the channel-section steel. Set up the mounting panel, control fixedly to preventing overturning the box, it is spacing to carry out the chucking around the mounting panel through the channel-section steel simultaneously, further improves installation stability for the jack can't produce the aversion.
Preferably, the bottom of the channel steel is provided with a movable plate in one-to-one correspondence with the mounting plate, and the movable plate is used as a base plate for locking and fastening the second bolt and nut assembly.
And simultaneously, the utility model also provides a bridge aerial working platform braced system prevents construction method that topples, including following step:
s1, placing at least two jacks arranged at left and right intervals on the built bridge aerial work platform;
the bridge aerial work platform comprises a core penetrating rod horizontally penetrating the bridge pier, a jack is vertically placed on a channel steel above the core penetrating rod, and a platform main beam is arranged above the jack;
s2, after the jack is stably placed, installing an anti-overturning box;
the anti-overturning box is a rigid box formed by buckling two halves, the top and the bottom of the anti-overturning box are open, the cross sections of the two buckled halves are L-shaped respectively and are formed by bending steel plates with the thickness of 10 +/-5 mm, outward flanges are arranged at the buckling positions of the two halves respectively, the two halves are locked and fixed through fasteners on the outward flanges after being buckled, the two buckling positions of the anti-overturning box are arranged in a left-right staggered mode, the edge distance L1 of the outward flanges at the two buckling positions is equal to the inner width of the channel steel, mounting plates are welded on the left outer side and the right outer side of the bottom of the anti-overturning box respectively, the length L2 of each mounting plate is equal to the inner width of the channel steel, and the mounting plates are locked and fixed on the channel steel through second bolt and nut assemblies;
firstly, inserting two halves of an anti-overturning box into channel steel from the left side and the right side of a jack in sequence to form a buckling structure, and then locking and fixing the two halves into a rigid box, so that the front end and the rear end of the anti-overturning box are just propped against the inner side wall of the channel steel through flanging and mounting plates, and the main body of the jack is covered in the rigid box, and the top end of the jack penetrates through the anti-overturning box and is tightly propped against the bottom of a platform girder;
and S3, lifting the platform main beam through a jack until the height of the platform main beam is adjusted to a proper position.
Preferably, in step S2, a hanging ring is welded to the outer wall of the overturn-preventing box, and when the overturn-preventing box is installed, a safety rope is tied to the hanging ring to prevent the operation box from falling due to misoperation.
Preferably, the jack is a mechanical jack, and an opening is formed in the side wall of the overturn-preventing box corresponding to the position of the jack operating rod, so that the jack operating rod is exposed.
Preferably, after the jack jacks the platform girder in place, the distance between the platform girder and the overturn prevention box is 4-5 cm, so that enough reserved space is ensured, and subsequent demoulding is facilitated.
The utility model has the advantages that:
(1) after the jack is stably placed and before the jack is jacked in place, the anti-overturning box is mounted, the anti-overturning box adopts a rigid box, the top of the rigid box is large in area, the anti-overturning box and the jack support the platform main beam together, the supporting area is larger, the stability is better, the height of the jack is adjusted, and the mounting difficulty is low; even if the left jack and the right jack have deviation in height, the platform main beam is erected and then inclines, the jacks cannot have the sliding risk, and meanwhile, the risk that the main beam is subjected to center-of-gravity deviation is reduced.
(2) The anti-overturning box is a rigid box formed by buckling two halves, can be inserted and installed from the left side and the right side after the jack is placed stably, is convenient and quick to install, can cover the jack in the rigid box, can tightly prop the top end of the jack at the bottom of the platform main beam through the anti-overturning box to continuously lift the jack, adjusts the height of the platform main beam, and is ingenious in design and low in manufacturing cost;
(3) the anti-overturning box completely wraps the jack and limits the displacement of the jack; and in case the jack phenomenon of malfunctioning appears, the platform girder directly falls in the box top of preventing toppling, and rigid box plays the effect of interim support operation platform, reserves the time of fleing for the operation personnel, even the jack also can reserve sufficient time and ensure personnel's safe escape taking place malfunctioning.
Drawings
Fig. 1 is a schematic structural diagram of a conventional bridge aerial work platform support system.
Fig. 2 is a schematic structural diagram of a limiting overturn-preventing device of a bridge aerial work platform supporting system (after jacking).
Fig. 3 is a simple step diagram (top view) of the overturn prevention construction method of the support system of the bridge aerial work platform.
FIG. 4 is a structure of the overturn-preventing box, which is locked and fixed by the support lugs with holes and the L-shaped reinforcing bars.
Detailed Description
The invention will be further described by way of examples with reference to the accompanying drawings:
referring to fig. 2-3, a bridge aerial work platform support system limiting and overturn preventing device is characterized in that a core penetrating rod 2 is horizontally arranged on a pier 1 in a penetrating mode, a jack 3 is vertically arranged on a channel steel 4 above the core penetrating rod 2, and a platform main beam 5 is arranged above the jack 3.
The anti-overturning box 6 is formed by buckling and enclosing two halves and is locked and fixed into a rigid box, the main body of the jack 3 is covered in the rigid box, and the top end of the jack 3 penetrates through the anti-overturning box 6 and is tightly propped against the bottom of the platform main beam 5.
Preferably, the top and the bottom of the overturn-preventing box 6 are open, the two buckled half cross sections are respectively in an L shape and are formed by bending a steel plate with the thickness of 10 +/-5 mm, and the thickness of the steel plate is preferably 10 mm. The buckling positions of the two halves are respectively provided with an outward flanging 6a, and the two halves are locked and fixed through fasteners on the outward flanging 6a after being buckled.
As shown in fig. 2, the fastener may employ a first bolt-nut assembly 7. Or as shown in fig. 4, a support lug with holes 10 is welded on one of the outer flanging 6a, a through hole is arranged on the other corresponding outer flanging 6a, and the support lug with holes 10 passes through the through hole and is combined with an L-shaped steel bar 11 for locking and fixing.
Two buckling positions of the overturn-preventing box 6 are preferably arranged in a left-right staggered mode, and the edge distance L1 of the flanging 6a of the two buckling positions is equal to the inner width of the channel steel 4, so that the front end and the rear end of the overturn-preventing box 6 just abut against the inner side wall of the channel steel 4 through the flanging 6 a.
The mounting panel 6b has been welded respectively in the outside about the box 6 bottom of preventing overturning, and the length L2 of mounting panel 6b equals channel-section steel 4's interior width for both ends are just in time supported on the inside wall of channel-section steel 4 through mounting panel 6b around the box 6 of preventing overturning, and mounting panel 6b passes through the locking of second bolt and nut subassembly 8 and fixes on channel-section steel 4.
And movable plates 9 which are in one-to-one correspondence with the mounting plates 6b are arranged at the bottom of the channel steel 4 and are used as base plates for locking and fastening the second bolt-nut assemblies 8.
An overturn-preventing construction method for a bridge aerial work platform supporting system comprises the following steps:
s1, placing at least two jacks 3 arranged at left and right intervals on the built bridge aerial work platform;
the bridge aerial working platform comprises a penetrating rod 2 horizontally penetrating through the bridge pier 1, a jack 3 is vertically placed on a channel steel 4 above the penetrating rod 2, and a platform main beam 5 is arranged above the jack 3.
S2, after the jack is stably placed, installing an anti-overturning box 6;
the overturn-preventing box 6 is a rigid box formed by buckling two halves, the top and the bottom of the overturn-preventing box 6 are open, the two half cross sections of the buckling are L-shaped respectively and are formed by bending steel plates with the thickness of 10 +/-5 mm, outward turned edges 6a are arranged at the buckling positions of the two halves respectively, and the two halves are locked and fixed through fasteners on the outward turned edges 6a after being buckled. Stagger the setting about two lock positions of preventing overturning box 6, the marginal interval L1 of the flanging 6a of two lock positions equals channel-section steel 4's interior width, and the outside has welded mounting panel 6b respectively about preventing overturning box 6 bottom, and mounting panel 6 b's length L2 equals channel-section steel 4's interior width, and mounting panel 6b passes through the locking of second bolt and nut subassembly 8 and fixes on channel-section steel 4.
Firstly, two halves of the anti-overturning box 6 are inserted into the channel steel 4 from the left side and the right side of the jack 3 in sequence to form a buckling structure, and then the two halves are locked and fixed to form a rigid box, so that the front end and the rear end of the anti-overturning box 6 are just propped against the inner side wall of the channel steel 4 through the flanging 6a and the mounting plate 6b, the main body of the jack 3 is covered in the rigid box, and the top end of the jack 3 penetrates through the anti-overturning box 6 and is tightly propped at the bottom of the platform girder 5.
And S3, jacking the platform main beam 5 through the jack 3 until the height of the platform main beam 5 is adjusted to a proper position.
In step S2, a hanging ring is welded to the outer wall of the overturn-preventing box 6, and when the overturn-preventing box 6 is installed, a safety rope is tied to the hanging ring to prevent the operation box from falling due to misoperation.
The jack 3 is preferably a mechanical jack, and an opening 6c is formed in the side wall of the overturn preventing box 6 at the position corresponding to the jack operating rod 3a for exposing the jack operating rod.
In addition, after the jack 3 jacks the platform main beam 5 in place, the distance between the platform main beam 5 and the overturn preventing box 6 is 4-5 cm, a space is reserved, and demolding in the subsequent construction process is facilitated.
Claims (6)
1. The utility model provides a spacing anti-overturning device of bridge aerial working platform braced system, wears to establish punching stick (2) on pier (1) including the level, and jack (3) are vertical to be placed on channel-section steel (4) of punching stick (2) top, and jack (3) top is platform girder (5), its characterized in that: the anti-overturning lifting platform is characterized by further comprising an anti-overturning box (6), wherein the anti-overturning box (6) is formed by buckling and enclosing two halves and is locked and fixed to form a rigid box, the main body of the jack (3) is covered in the rigid box, and the top end of the jack (3) penetrates through the anti-overturning box (6) and is tightly jacked at the bottom of the platform main beam (5).
2. The limiting and overturn-preventing device for the bridge aerial work platform supporting system according to claim 1, characterized in that: the top and the bottom of the overturn-preventing box (6) are open, the two half cross sections of the buckling are L-shaped respectively and are formed by bending steel plates with the thickness of 10 +/-5 mm, the buckling positions of the two halves are provided with flanging (6a) respectively, and the two halves are locked and fixed through fasteners on the flanging (6a) after being buckled.
3. The limiting and overturn-preventing device for the bridge aerial work platform supporting system according to claim 2, characterized in that: the fastener adopts a first bolt-nut assembly (7); or, a support lug with holes (10) is welded on one of the outer flanging (6a), a through hole is arranged on the other corresponding outer flanging (6a), and the support lug with holes (10) penetrates through the through hole and is locked and fixed by combining an L-shaped steel bar (11).
4. The limiting and overturn-preventing device for the bridge aerial work platform supporting system according to claim 2, characterized in that: two buckling positions of the anti-overturning box (6) are staggered left and right, the edge distance L1 of the flanging (6a) of the two buckling positions is equal to the inner width of the channel steel (4), and the front end and the rear end of the anti-overturning box (6) just abut against the inner side wall of the channel steel (4) through the flanging (6 a).
5. The limiting and overturn-preventing device for the bridge aerial work platform supporting system according to claim 4, characterized in that: prevent that the outside has welded mounting panel (6b) respectively about box (6) bottom of toppling, the length L2 of mounting panel (6b) equals the interior width of channel-section steel (4) for both ends are just in time supported on the inside wall of channel-section steel (4) through mounting panel (6b) around box (6) of preventing toppling, and mounting panel (6b) are fixed on channel-section steel (4) through second bolt and nut subassembly (8) locking.
6. The limiting and overturn-preventing device for the bridge aerial work platform supporting system according to claim 5, characterized in that: the bottom of the channel steel (4) is provided with movable plates (9) which are in one-to-one correspondence with the mounting plates (6b) and used as a base plate for locking and fastening the second bolt and nut assembly (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023223282.1U CN214831940U (en) | 2020-12-28 | 2020-12-28 | Spacing device of overturning of preventing of bridge aerial working platform braced system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023223282.1U CN214831940U (en) | 2020-12-28 | 2020-12-28 | Spacing device of overturning of preventing of bridge aerial working platform braced system |
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| CN214831940U true CN214831940U (en) | 2021-11-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813831A (en) * | 2020-12-28 | 2021-05-18 | 中铁隧道集团一处有限公司 | Limiting and overturning preventing device for supporting system of bridge aerial work platform and construction method |
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- 2020-12-28 CN CN202023223282.1U patent/CN214831940U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813831A (en) * | 2020-12-28 | 2021-05-18 | 中铁隧道集团一处有限公司 | Limiting and overturning preventing device for supporting system of bridge aerial work platform and construction method |
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