CN115928575A - Construction method of bridge bottom construction platform - Google Patents
Construction method of bridge bottom construction platform Download PDFInfo
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- CN115928575A CN115928575A CN202211279870.8A CN202211279870A CN115928575A CN 115928575 A CN115928575 A CN 115928575A CN 202211279870 A CN202211279870 A CN 202211279870A CN 115928575 A CN115928575 A CN 115928575A
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Abstract
The invention discloses a bridge bottom construction platform construction method, which belongs to the technical field of bridge construction and comprises the following steps: the method comprises the following steps that channel steel is adopted as a main beam and a cross beam to be spliced to form a framework of the pocket bottom protection platform, a steel plate net is laid on the framework, and a toe board is laid on the steel plate net to form the pocket bottom protection platform; hanging a plurality of suspension rods on a pipeline and a cast-in-place section preset in a bridge beam slab, respectively installing lifting devices at the left end and the right end of the bridge beam slab, wherein each lifting device is provided with an anti-falling mechanism, steel wire ropes are wound on the two lifting devices, and the lower ends of the steel wire ropes are respectively connected with two ends of a protection platform; hoisting device roll-up wire rope lifts by crane the protection platform at the bottom of the pocket, ensures that the protection platform is in the horizontality back at the bottom of the pocket, fixes the protection platform at the bottom of the pocket at the lower extreme of jib. The construction method of the bridge bottom construction platform can safely and efficiently build the bridge bottom construction platform and can accept materials accidentally dropped during bridge construction.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a construction method of a bridge bottom construction platform.
Background
Along with rapid development of traffic industries such as highways, railways, municipal administration and the like, road crossing phenomena are more and more common, safety measures are required to be made when existing roads are spanned on newly-built roads, and if construction operation is improper during the upper-span bridge construction, building materials fall from high places, serious safety accidents can be caused to roads below.
A common safety measure is to set up a protective shed. However, when the clear height of the overpass is high, the effect of building a protective shed on the road surface is not good.
Disclosure of Invention
The invention aims to solve at least one technical problem in the prior art, and provides a construction method of a bridge bottom construction platform, which can be used for building a construction platform at the bridge bottom of an upper-span bridge and preventing construction materials on the upper-span bridge from falling onto a road below.
The construction method of the bridge bottom construction platform provided by the embodiment of the invention comprises the following steps:
step 1: the method comprises the following steps that channel steel is adopted as a main beam and a cross beam to be spliced to form a framework of the pocket bottom protection platform, a steel plate net is laid on the framework, and a toe board is laid on the steel plate net to form the pocket bottom protection platform;
step 2: hanging a plurality of suspension rods on a pipeline and a cast-in-place section preset in a bridge beam slab, respectively installing lifting devices at the left end and the right end of the bridge beam slab, wherein each lifting device is provided with an anti-falling mechanism, steel wire ropes are wound on the two lifting devices, and the lower ends of the steel wire ropes are respectively connected with two ends of a protection platform;
and step 3: hoisting device roll-up wire rope lifts by crane protection platform at the bottom of the pocket, ensures that protection platform is in the horizontality back at the bottom of the pocket, fixes protection platform at the lower extreme at the jib at the bottom of the pocket.
The construction method of the bridge bottom construction platform provided by the embodiment of the invention at least has the following beneficial effects: the construction method of the bridge bottom construction platform can safely and efficiently build the bridge bottom construction platform and can accept materials accidentally dropped during bridge construction. Promote the installation through hoisting device to the pocket bottom protection platform of assembling in advance, the efficiency of construction is higher, and the in-process of the construction of protection platform can be avoided falling at the pocket bottom to the setting up of dropproof mechanism, causes the incident, and the material that unexpected dropped when the bridge construction can be accepted safely effectively to the pocket bottom protection platform after the construction was accomplished.
According to some embodiments of the invention, the anti-falling mechanism comprises a fixed pulley, a chute and a clamping wheel, the chute is obliquely arranged, the chute is gradually close to the fixed pulley from bottom to top, the clamping wheel is movably arranged in the chute, and the steel wire rope is arranged between the chute and the fixed pulley in a penetrating manner.
According to some embodiments of the invention, the bridge beam slab is provided with a support, and the plurality of suspension rods are hung on the support.
According to some embodiments of the invention, the support is provided with a traveling mechanism, a rail is laid on the bridge beam slab along the length direction of the bridge, and the traveling mechanism is matched with the rail and drives the support to move along the rail.
According to some embodiments of the invention, in step 3, after the construction of a section of bridge is completed, the traveling mechanism operates to move the bottom protection platform along the track to the section of the bridge to be constructed.
According to some embodiments of the invention, the bracket is provided with a vibration damping device.
According to some embodiments of the invention, the footplate is provided with an air cushion.
According to some embodiments of the present invention, the air cushion has a plurality of drainage grooves formed therein.
According to some embodiments of the invention, a bending part is arranged on the periphery side of the pocket bottom protection platform, and the bending part is bent upwards.
According to some embodiments of the present invention, the bending portion has a plurality of drainage holes.
According to some embodiments of the invention, the hanger bar is a 32mm finish rolled steel.
According to some embodiments of the invention, the main beams and the cross beams are 2[14 ] channel steel.
According to some embodiments of the invention, the steel screen has a thickness of 0.5mm.
According to some embodiments of the invention, the panels are bamboo plywood.
According to some embodiments of the invention, the bamboo veneer is 2cm thick.
According to some embodiments of the invention, the rail is a 10-channel steel.
According to some embodiments of the present invention, the bracket is formed by splicing 16# I-steel.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further illustrated with reference to the following figures and examples:
FIG. 1 is a schematic structural diagram of a bridge bottom construction platform according to an embodiment of the invention;
FIG. 2 is a right side view of FIG. 1;
FIG. 3 is a top view of the bottom protective platform of FIG. 1;
FIG. 4 is an enlarged view of a portion of FIG. 1 at A;
FIG. 5 is a front view of the bottom protective platform of FIG. 1;
FIG. 6 is a schematic view of the internal structure of the fall arrest mechanism of FIG. 1;
FIG. 7 is a schematic structural view of the fall arrest mechanism of FIG. 6 in a first state;
fig. 8 is a schematic structural view of the fall arrest mechanism of fig. 6 in a second state.
Description of reference numerals:
a bottom pocket protection platform 100; a main beam 110; a cross member 120; a steel mesh 130; an air cushion 140; a drain tank 141; a bent portion 150; a drain hole 151; a footboard 160;
a bridge beam panel 200; a lifting device 210; a fall arrest mechanism 220; a fixed pulley 221; a chute 222; a clamping wheel 223; a wire rope 230;
a support 300; a hanger bar 310; a traveling mechanism 320; a track 330; a vibration damping device 340.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
A bridge floor construction platform construction method according to an embodiment of the present invention will be described with reference to fig. 1 to 8.
As shown in fig. 1 to 8, a bridge bottom construction platform construction method according to an embodiment of the present invention includes:
step 1: the method comprises the following steps that channel steel is adopted as a main beam 110 and a cross beam 120 to be spliced to form a framework of the pocket bottom protection platform 100, a steel plate net 130 is laid on the framework, and a toe board 160 is laid on the steel plate net 130 to form the pocket bottom protection platform 100;
step 2: hanging a plurality of suspenders 310 on a pipeline and a cast-in-place section preset in a bridge beam slab 200, installing lifting devices 210 at the left end and the right end of the bridge beam slab 200 respectively, arranging anti-falling mechanisms 220 on the lifting devices 210, winding steel wire ropes 230 on the two lifting devices 210, and connecting the lower ends of the steel wire ropes 230 with two ends of a protection platform respectively;
and 3, step 3: the lifting device 210 retracts the steel wire rope 230 to lift the bottom pocket protection platform 100, and after the bottom pocket protection platform 100 is ensured to be in a horizontal state, the bottom pocket protection platform 100 is fixed at the lower end of the suspender 310.
In step 1, 2[14 ] channel steel is used as a main beam 110 and a cross beam 120 to splice a rectangular framework of the pocket bottom protection platform 100, a steel plate net 130 with the thickness of 0.5mm is laid on the framework, and a bamboo plywood with the thickness of 2cm is laid on the steel plate net 130 to serve as a hand foot board 160.
In another embodiment of the present invention, the air cushion 140 is laid on the bamboo plywood, the air cushion 140 is composed of a plurality of arc-shaped protrusions, the air cushion 140 can play a role of buffering when the bottom protection platform 100 receives falling objects, so as to prevent the bottom protection platform 100 from receiving a large impact force, improve the reliability of the bottom protection platform 100, and meanwhile, if some constructors fall off the bridge carelessly, the air cushion 140 can also play a role of buffering the falling objects, thereby reducing the injury to the falling objects.
In the above technical solution, the drainage grooves 141 are naturally formed between the adjacent arc-shaped protrusions on the air cushion 140, and in a rainy day environment, rainwater on the bottom protection platform 100 is collected into the drainage grooves 141 to be drained, so as to prevent the metallic structure in the bottom protection platform from being corroded due to rainwater accumulation.
As shown in fig. 5, the left and right sides of the bottom protection platform 100 are provided with bending portions 150, and the bending portions 150 are bent upward, so that falling objects are prevented from rolling off from the left and right sides of the bottom protection platform 100 and causing damage to a road below a bridge. The bottom of the bending portion 150 is provided with a drain hole 151, so that the arrangement of the bending portion 150 does not cause 100 accumulated water in the bottom of the pocket protection platform, and the phenomenon that the rainwater is accumulated to cause the corrosion of a metal structure in the bottom of the pocket protection platform is further avoided.
The bridge beam plate 200 is provided with a support 300, and the support 300 is formed by splicing 16# I-steel. The upper ends of a plurality of phi 32mm finish-rolled deformed steel bar suspenders 310 are connected with a support 300 to be suspended on the support 300, a lifting device 210 is arranged on a bridge beam plate 200, the lifting device 210 is connected with the bottom pocket protection platform 100 through a steel wire rope 230, the lifting device 210 retracts the steel wire rope 230 to lift the bottom pocket protection platform 100, so that the bottom pocket protection platform 100 is lifted to the lower end of the suspenders 310, after the bottom pocket protection platform 100 is ensured to be in a horizontal state, the bottom pocket protection platform 100 is connected with the lower end of the suspenders 310, and therefore the bottom pocket protection platform 100 is fixed at the lower end of the bridge beam plate 200.
As shown in fig. 4 and 6, the anti-falling mechanism 220 is disposed on the bridge beam slab 200, the anti-falling mechanism 220 includes a fixed pulley 221, a chute 222 and a clamping wheel 223, the chute 222 is disposed in an inclined manner, the chute 222 is gradually close to the fixed pulley 221 from bottom to top, the clamping wheel 223 is movably disposed in the chute 222, and the steel wire rope 230 is disposed between the chute 222 and the fixed pulley 221 in a penetrating manner. The left end of the steel wire rope 230 is connected with the lifting device 210, and the right end of the steel wire rope 230 is connected with the pocket bottom protection platform 100.
As shown in fig. 7, when the lifting device 210 retracts the steel wire rope 230, the fixed pulley 221 moves counterclockwise, the clamping wheel 223 moves clockwise, the clamping wheel 223 is located at the lower end of the sliding groove 222 due to the self-gravity, the steel wire rope 230 smoothly slides between the clamping wheel 223 and the fixed pulley 221, and the bottom protection platform 100 is normally lifted.
As shown in fig. 8, when the lifting device 210 fails to cause the bottom-pocket protection platform 100 to fall, the steel wire rope 230 slides towards the right, the fixed pulley 221 rotates clockwise, the left end of the steel wire rope 230 slides upwards to drive the clamping wheel 223 to move upwards along the sliding groove 222, because the sliding groove 222 is gradually close to the fixed pulley 221 from bottom to top, the clamping wheel 223 can gradually clamp the steel wire rope 230 in the upwards sliding process, until the steel wire rope 230 completely stops sliding, the falling of the bottom-pocket protection platform 100 can automatically drive the clamping wheel 223 to clamp the steel wire rope 230, and then the bottom-pocket protection platform 100 is prevented from further falling, and the safety accident caused by the falling of the bottom-pocket protection platform 100 is avoided.
As shown in fig. 4, a traveling mechanism 320 is provided at the bottom end of the bracket 300, a rail 330 is provided on the bridge deck 200 along the front-rear direction, and the rail 330 is a 10-channel steel, so that after construction of a section of bridge is completed, the traveling mechanism 320 operates to drive the bracket 300, the hanger rod 310 and the bottom protection platform 100 to move to the next construction bridge section along the rail 330. Therefore, the bottom pocket protection platform 100 does not need to be repeatedly installed, disassembled, lifted and put down, the construction efficiency is improved, meanwhile, the falling risk caused by repeatedly lifting the bottom pocket protection platform 100 is reduced, and the safety of the bridge bottom construction platform construction method is further improved.
As shown in fig. 4, the support 300 is provided with a vibration damping device 340, and the vibration damping device 340 can reduce the impact force applied to the support 300 when the pocket bottom protection platform 100 receives falling objects, so as to prevent the support 300 from rolling over or breaking, which causes serious safety accidents.
In summary, the construction method of the bridge bottom construction platform can safely and efficiently build the bridge bottom construction platform and can bear materials accidentally dropped during bridge construction. Promote the installation through protection platform 100 at the bottom of the pocket that hoisting device 210 assembled in advance, the efficiency of construction is higher, and the in-process that protection platform 100's construction was fallen at the bottom of the pocket can be avoided in the setting of dropproof mechanism 220, causes the incident, and protection platform 100 can safely accept the material that the accident dropped when the bridge construction effectively at the bottom of the pocket after the construction was accomplished.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (17)
1. A construction method of a bridge bottom construction platform is characterized by comprising the following steps:
step 1: the method comprises the steps that channel steel is adopted as a main beam (110) and a cross beam (120) to be spliced to form a framework of the pocket bottom protection platform (100), a steel plate net (130) is laid on the framework, and a hand foot plate (160) is laid on the steel plate net (130) to form the pocket bottom protection platform (100);
step 2: hanging a plurality of suspenders (310) on a pipeline and a cast-in-place section preset in a bridge beam plate (200), respectively installing lifting devices (210) at the left end and the right end of the bridge beam plate (200), wherein each lifting device (210) is provided with a falling prevention mechanism (220), steel wire ropes (230) are wound on the two lifting devices (210), and the lower ends of the steel wire ropes (230) are respectively connected with two ends of the pocket bottom protection platform (100);
and step 3: the lifting device (210) retracts the steel wire rope (230) to lift the pocket bottom protection platform (100), and after the pocket bottom protection platform (100) is ensured to be in a horizontal state, the pocket bottom protection platform (100) is fixed to the lower end of the hanger rod (310).
2. The bridge bottom construction platform construction method according to claim 1, wherein the anti-falling mechanism (220) comprises a fixed pulley (221), a sliding chute (222) and a clamping wheel (223), the sliding chute (222) is obliquely arranged, the sliding chute (222) is gradually close to the fixed pulley (221) from bottom to top, the clamping wheel (223) is movably arranged in the sliding chute (222), and the steel wire rope (230) is arranged between the sliding chute (222) and the fixed pulley (221) in a penetrating manner.
3. The bridge bottom construction platform construction method according to claim 1, wherein a support (300) is provided on the bridge girder (200), and a plurality of the hanger rods (310) are hung on the support (300).
4. The bridge bottom construction platform construction method according to claim 3, wherein a traveling mechanism (320) is provided on the support (300), a rail (330) is laid on the bridge beam slab (200) along the length direction of the bridge, and the traveling mechanism (320) is engaged with the rail (330) and drives the support (300) to move along the rail (330).
5. The bridge floor construction platform construction method according to claim 4, wherein in step 3, after completing construction of a section of the bridge, the traveling mechanism (320) is operated to move the bottom-pocket protection platform (100) along the rail (330) to a section of the bridge to be constructed.
6. The bridge bottom construction platform construction method according to claim 3, wherein a vibration damping device (340) is provided on the bracket (300).
7. The bridge floor construction platform construction method according to claim 1, wherein an air cushion (140) is laid on the footing plate (160).
8. The bridge bottom construction platform construction method according to claim 7, wherein a plurality of drainage grooves (141) are formed on the air cushion (140).
9. The construction method of the bridge bottom construction platform according to claim 1, wherein a bending part (150) is arranged on the periphery of the bottom protection platform (100), and the bending part (150) is bent upwards.
10. The construction method of the bridge bottom construction platform according to claim 9, wherein a plurality of drain holes (151) are formed on the bent portion (150).
11. The bridge bottom construction platform construction method according to claim 1, wherein the hanger bar (310) is finish-rolled deformed steel bar with a diameter of 32 mm.
12. The bridge bottom construction platform construction method according to claim 1, wherein the main beams (110) and the cross beams (120) adopt 2[14 ] channel steel.
13. The bridge floor construction platform construction method according to claim 1, wherein the thickness of the steel plate net (130) is 0.5mm.
14. The bridge bottom construction platform construction method according to claim 1, wherein the toe plate (160) is a bamboo plywood.
15. A bridge floor construction platform construction method according to claim 14, wherein the thickness of the bamboo plywood is 2cm.
16. The bridge floor construction platform construction method according to claim 4, wherein the rail (330) is [ 10-channel steel.
17. The bridge bottom construction platform construction method according to claim 3, wherein the support (300) is formed by splicing 16# I-steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211279870.8A CN115928575A (en) | 2022-10-19 | 2022-10-19 | Construction method of bridge bottom construction platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211279870.8A CN115928575A (en) | 2022-10-19 | 2022-10-19 | Construction method of bridge bottom construction platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115928575A true CN115928575A (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211279870.8A Pending CN115928575A (en) | 2022-10-19 | 2022-10-19 | Construction method of bridge bottom construction platform |
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| Country | Link |
|---|---|
| CN (1) | CN115928575A (en) |
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- 2022-10-19 CN CN202211279870.8A patent/CN115928575A/en active Pending
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