CN110144819B - Safe walking system for manual inspection of truss bridge and use method - Google Patents
Safe walking system for manual inspection of truss bridge and use method Download PDFInfo
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- CN110144819B CN110144819B CN201910491194.2A CN201910491194A CN110144819B CN 110144819 B CN110144819 B CN 110144819B CN 201910491194 A CN201910491194 A CN 201910491194A CN 110144819 B CN110144819 B CN 110144819B
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- 238000007689 inspection Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 description 6
- 230000036541 health Effects 0.000 description 5
- 238000011179 visual inspection Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
- E01D19/106—Movable inspection or maintenance platforms, e.g. travelling scaffolding or vehicles specially designed to provide access to the undersides of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a safe walking system for manual inspection of a truss bridge and a use method thereof. The safe running system comprises two rectangular hoop devices, a high-strength steel wire rope connected with the two rectangular hoop devices, a movable safety sleeve penetrating through the high-strength steel wire rope, a box-shaped hoop device and a high-strength splice plate device connected with the box-shaped hoop device. The high-strength steel wire rope with the movable safety sleeve is fixed on the truss vertical rod or the inclined web member through the rectangular hoop device, so that the patrol personnel can have sufficient movable space under the safety guarantee; meanwhile, the inspection personnel can hook the waist safety rope hook on the perforated lug plate of the box-shaped hoop device at any time in the running process, double insurance is added to the inspection process safety, and therefore the problem of insufficient inspection quality of local components caused by the fact that the inner part of the girder of the truss bridge is far away from the position of the inspection channel is solved.
Description
Technical Field
The invention relates to the field of detection and maintenance in the operation stage of a large-span bridge, in particular to a safe walking system for manual inspection of a truss bridge and a use method thereof.
Background
At present, large-span bridges are being built in large scale in China, the bridge structure forms mainly comprise suspension bridges and cable-stayed bridges, the bridge structure forms generally have the characteristics of large flexibility, easiness in natural action, unfavorable vibration and the like, meanwhile, the large-span bridges are often built in special topography areas such as mountain areas, and the girder forms of the large-span bridges are mainly steel truss stiffening girders. The truss bridge is easy to be influenced by complex natural environments, and has the defects of paint falling, component corrosion, bolt distortion and deformation and the like in the operation process, and the phenomena of fatigue damage cracking, high-strength bolt loosening and the like, and if the defects cannot be prevented and treated in time, the defects can have serious influence on the strength and the service life of the bridge, so that the health monitoring and the inspection maintenance of the truss bridge are very necessary, and the truss bridge has great significance in ensuring normal traffic operation and lives and properties of people.
The existing large bridge inspection is divided into 5 stages according to the detection depth: grade 1 refers to visual inspection at a remote location or visual inspection with a telescope; grade 2 refers to visual inspection of the substantially proximate examination site, allowing the eye-to-examination site distance to be above 50 cm; grade 3 refers to visual inspection of the area substantially proximate to the inspection area requiring the eyeglasses to be within 50cm of the area of inspection distance; the level 4 is very close to the checking position, and can be checked by adopting modes of touch, knocking, pulling, optical amplification and the like besides visual observation; class 5 refers to inspection or measurement by means of dedicated instruments, such as real-time monitoring by health monitoring systems or load testing, etc.
Because the health monitoring system is only provided with the sensors at some key positions and key points, the whole steel truss structure cannot be covered by the sensor network, local components which cannot be covered by the sensors are usually blind spots for bridge safety inspection, such as rust and bolt looseness on the steel truss, and the like, all the parts are inspected by necessary manual inspection frequently or regularly, and the quality complementation of the whole safety inspection of the health monitoring system can be realized.
The existing manual inspection for the girder erection bridge is generally that inspection personnel stand on inspection channels on two sides of the girder erection bridge to conduct visual inspection, and the visual distance is limited, and the existing inspection method for the girder erection bridge is only 1 level or 2 level, so that the safety inspection effect is obviously insufficient. Once fatigue cracking or bolt loosening occurs on the local components, if the local components cannot be checked and treated in time, the bridge bearing capacity and durability are liable to be reduced, and even safety accidents are caused. It is therefore necessary to manually inspect the steel truss members at close distances.
Disclosure of Invention
The invention provides a safe walking system for manual inspection of a truss bridge, which aims to solve the problem of insufficient inspection quality of local components caused by the fact that the inner part of a girder of the truss bridge is far away from an inspection channel.
Further, the rectangular hoop device is formed by bolting and assembling two channel steel with flange plates and reserved bolt holes at the ends. Specifically, the web plate of one channel steel is welded with a perforated lug plate for fixing the high-strength steel wire rope.
Further, the middle section of the movable safety sleeve is inwards concave to form a binding groove; the movable safety sleeve is capable of sliding on the high strength steel wire rope and also capable of rotating around the high strength steel wire rope.
Further, the box-shaped hoop device comprises a hoop hollow barrel formed by bolting and assembling channel steel with two end parts provided with flange plates and reserved bolt holes and a box top plate positioned at the top of the hoop hollow barrel; the web plate of one channel steel is welded with a perforated lug plate; the roof of the box is provided with bolt holes for bolting with the high-strength splice plate device.
Further, the high-strength splice plate device comprises a splice plate, a connecting plate and a rotating shaft; the number of splice plates is 2N, and N is more than or equal to 2; the splice plates are tiled and arranged into two rows and N columns, the splice plates on each row are connected through a connecting plate, and the splice plates on each column are connected through a rotating shaft.
Further, the top plate of the box chamber is connected with two splice plates positioned on the same column through bolts; the number of the box-shaped hoop devices is M, and M is more than or equal to 1 and less than or equal to N.
Further, the size of the rectangular hoop device is customized in advance according to the requirements of inspection work and the size of the inclined web member and the vertical rod of the girder of the inspected truss bridge.
On the other hand, the invention also relates to a using method of the safety walking system for the manual inspection of the truss bridge, which comprises the following steps:
step one, respectively bolting and fixing two rectangular hoop devices on two different diagonal web members or vertical rods positioned in the same cross section of a truss bridge (namely in the transverse bridge direction);
step two, penetrating the high-strength steel wire rope through the movable safety sleeve, tensioning the high-strength steel wire rope, and respectively fixing two ends of the high-strength steel wire rope on the two rectangular hoop devices which are fixed in the step one;
thirdly, bolting and fixing the hoops of the M box-shaped hoop devices at the lower parallel joint near the detected member, wherein M is more than or equal to 1;
step four, connecting the 2N splice plates into N pairs through a rotating shaft, bolting through a connecting plate, so that the 2N splice plates are in two rows and N columns which are tiled, and bolting the two splice plates positioned on the same column to a box top plate of a box-shaped hoop device, wherein M is less than or equal to N;
step five, after the step four is completed, the hook at the end of the safety rope tied on the shoulders of the inspection personnel is fixed on the binding groove of the movable safety sleeve in a surrounding manner;
step six, the inspection personnel can inspect the waist when walking to a position according to the working requirement, and fix the end hooks of the safety rope tied in the waist on the perforated lug plate of the box-shaped hoop device closest to the waist.
The patrol personnel can fix the hooks at the end parts of the safety ropes tied on the shoulders on the binding grooves of the movable safety sleeve in a surrounding manner, and the movable safety sleeve can move along the direction of the high-strength steel wire rope, so that the patrol personnel can be helped to safely move upwards in the transverse bridge; in addition, the movable safety sleeve with the binding groove rotates around the high-strength steel wire rope, so that the inspection personnel can safely move upwards along the bridge. Therefore, the system not only ensures the safety of the inspection personnel, but also can provide sufficient operation space for manual inspection.
Further, in the first step, the two rectangular hoop devices are horizontally arranged, and the horizontal position height of the rectangular hoop devices is flush with the shoulder height of the inspection personnel.
Further, in the second step, two ends of the high-strength steel wire rope are respectively fixed on the perforated lug plates of the two rectangular hoop devices which are fixed in the first step.
The invention thoroughly solves the problem of insufficient inspection quality of local components caused by the fact that the inner part of the girder of the truss bridge is far away from the position of the maintenance channel on the premise of ensuring the inspection safety. Specifically, the system is made of high-strength steel, and the hoop device, the splice plate and the like are processed by a numerical control lathe, so that the system is easy to carry and can be conveniently assembled on site on an overhaul channel. In addition, each component of the safe walking system is bolted and assembled through the high-strength bolts, and the convenience of manual inspection is improved on the premise that the mechanical property and the structural durability of the steel truss are not damaged. The safety traveling system is characterized in that the rectangular hoop device is used for fixing the high-strength steel wire rope with the movable safety sleeve on the truss vertical rod or the inclined web member, so that the inspection personnel can have sufficient movable space under the safety guarantee, and the inspection personnel can conveniently and fully inspect the components of each part of the steel truss in detail. Meanwhile, a perforated lug plate is welded on the box-shaped hoop device below the high-strength splice plate device, and an inspection personnel can continuously hook the waist safety rope hook on the perforated lug plate in the advancing process, so that double insurance is added to the safety of the inspection process. The splice plate is folded and spread through the rotating shaft, so that the square portable belt is bridged, the splice is simple and convenient to install, and the operability is strong.
Compared with the existing manual inspection system, the invention has the beneficial effects that:
the invention adopts the customized hoop device to fix the high-strength steel wire rope and the high-strength splice plate on the appointed rod piece of the truss bridge respectively, and the box-shaped hoop device is provided with the perforated lug plate and the movable safety sleeve is arranged on the high-strength steel wire rope, so that the safety of inspection personnel is ensured, and sufficient operation space can be provided for manual inspection.
The rectangular hoop device, the box-shaped hoop device and the high-strength splice plate device are all made of Q235 steel, the splice plates of the rectangular hoop device and the box-shaped hoop device are small in size and are customized in advance according to inspection requirements and girder rod sizes of the truss bridge, and therefore the safe walking system for manual inspection of the truss bridge can be assembled on the inspection channel in situ, each component is convenient to carry and assemble, and the actual inspection requirements are met after the assembly. In addition, the high-strength splice plate device has certain-depth lines on the surface after being machined by a numerical control lathe, and the surface of the node plate is cleaned before use, so that the high-strength splice plate device has sufficient friction force, the safety of inspection work can be improved, and the on-site safety operation is facilitated.
In conclusion, the truss bridge inspection platform is easy to carry and convenient to install, a safe and reliable operation platform can be provided for truss bridge inspection personnel, the cost is saved in the design of the truss bridge inspection platform, and the convenience is improved. The invention avoids the adverse actions of perforation, welding and the like which damage the mechanical properties of the main structure of the truss bridge; meanwhile, the invention not only greatly increases the working range and the operation space of the inspector in the girder of the truss bridge, but also ensures the safety of inspection work, because the system can ensure that the shoulder safety rope end hooks of the inspector are fixed on the movable safety sleeve, the waist safety rope end hooks are fixed on the perforated lug plate of the box-shaped hoop device, and the waist safety rope end hooks are stepped on the antiskid Gao Jiangpin connecting plate with lines by feet. For the truss bridge provided with the health monitoring system, the invention is also beneficial for system debugging and maintenance personnel to enter into a deeper part in the girder to check and replace a failed sensor. Compared with the existing inspection method for visual observation on the inspection and repair path, the invention is especially suitable for the inspection work of the bridge in the mountain area with complex environmental conditions, and ensures that inspection personnel can freely and stably, safely and precisely detect the local part of the bridge member in the girder of the truss bridge.
The present invention will be further described with reference to the accompanying drawings, in order to fully explain the objects, technical features and technical effects of the present invention.
Drawings
Fig. 1 is a schematic structural view of a specific embodiment of a safety walking system for manual inspection of truss bridge according to the present invention.
Fig. 2-5 are right, front, perspective and top views, respectively, of a rectangular hoop apparatus in one embodiment.
Fig. 6-9 are left, front, perspective and top views, respectively, of a high strength splice plate arrangement in one embodiment.
Fig. 10-13 are left, front, perspective and top views, respectively, of a box anchor ear device in one embodiment.
Fig. 14-17 are left, front, perspective and top views, respectively, of a movable safety sleeve in one embodiment.
Detailed Description
The technical scheme of the invention is further described through specific examples. The following examples are further illustrative of the invention and are not intended to limit the scope of the invention.
Fig. 1 shows a specific embodiment of the invention, in which the safety travelling system for manual inspection of a truss bridge comprises two rectangular hoop devices 1, a high-strength wire rope 12 connecting the two rectangular hoop devices 1, a movable safety sleeve 10 penetrating the high-strength wire rope 12, a box hoop device and a high-strength splice plate device 4 connected with the box hoop device.
Rectangular hoop device 1 (as shown in fig. 2-5) is formed by bolting and assembling two pieces of channel steel with flange plates 2 and reserved bolt holes at the ends, wherein a perforated lug plate 3 is welded at the web plate of one piece of channel steel for fixing a high-strength steel wire rope 12. The size of the rectangular hoop device 1 is customized in advance according to the requirements of inspection work and the size of the inclined web member and the vertical rod of the girder of the inspected truss bridge.
The middle section of the movable safety sleeve 10 (shown in fig. 14-17) is concave inward to form a binding groove 11, and the movable safety sleeve 10 is capable of sliding on the high strength wire rope 12 and also capable of rotating around the high strength wire rope 12.
The box-shaped hoop device (shown in figures 10-13) comprises a hoop hollow cylinder formed by bolting and assembling two channel steel with flange plates 21 and reserved bolt holes at the ends and a box roof 9 positioned at the top of the hoop hollow cylinder; the web plate of one channel steel is welded with a perforated lug plate 31; the roof 9 is provided with bolt holes for bolting with the high strength splice plate arrangement 4.
The high-strength splice plate device 4 (shown in fig. 6-9) comprises a splice plate 7, a connecting plate 8 and a rotating shaft 6; the number of splice plates 7 is 2N, and N is more than or equal to 2. The splice plates 7 are tiled and arranged into two rows and N columns, the splice plates 7 on each row are connected through the connecting plates 8, and the splice plates 7 on each column are connected through the rotating shaft 6. The top plate 9 of the box is connected with two splice plates 7 on the same column through bolts. The number of the box-shaped hoop devices is M, and M is more than or equal to 1 and less than or equal to N.
The application method of the safe walking system for manual inspection of the truss bridge comprises the following steps:
step one, respectively bolting and fixing two rectangular hoop devices on two different diagonal web members or vertical rods positioned in the same cross section of a truss bridge (namely in the transverse bridge direction); the two rectangular hoop devices are horizontally arranged, and the horizontal position height of the two rectangular hoop devices is flush with the shoulder height of the inspection personnel.
And step two, penetrating the high-strength steel wire rope through the movable safety sleeve, tensioning the high-strength steel wire rope, and respectively fixing the two ends of the high-strength steel wire rope on the perforated lug plates of the two rectangular hoop devices which are fixed in the step one.
And thirdly, bolting and fixing the hoops of the M box-shaped hoop devices at the lower parallel joint near the detected member, wherein M is more than or equal to 1.
Step four, connecting the 2N splice plates into N pairs through a rotating shaft, bolting through a connecting plate, so that the 2N splice plates are in two rows and N columns which are tiled, and bolting the two splice plates positioned on the same column onto a box top plate of the box-shaped hoop device, wherein M is less than or equal to N.
And step five, after the step four is completed, the safety rope end hooks tied on the shoulders of the inspection personnel are fixed on the binding grooves of the movable safety sleeve in a surrounding manner.
Step six, the inspection personnel can inspect the waist when walking to a position according to the working requirement, and fix the end hooks of the safety rope tied in the waist on the perforated lug plate of the box-shaped hoop device closest to the waist.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention without requiring creative effort by one of ordinary skill in the art. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (4)
1. The safe walking system for manual inspection of the truss bridge is characterized by comprising two rectangular hoop devices, a high-strength steel wire rope for connecting the two rectangular hoop devices, a movable safety sleeve penetrating through the high-strength steel wire rope, a box-shaped hoop device and a high-strength splice plate device connected with the box-shaped hoop device; the rectangular hoop device is formed by bolting and assembling two channel steels with flange plates and reserved bolt holes at the ends; a perforated lug plate is welded at the web plate of one of the channel steel and used for fixing the high-strength steel wire rope; the middle section of the movable safety sleeve is inwards concave to form a binding groove; the movable safety sleeve can slide on the high-strength steel wire rope and can rotate around the high-strength steel wire rope; the box-shaped hoop device comprises a hoop hollow cylinder formed by bolting and assembling two channel steel with flange plates and reserved bolt holes at the ends and a box top plate positioned at the top of the hoop hollow cylinder; wherein a perforated lug plate is welded at the web plate of one channel steel; the top plate of the box chamber is provided with a bolt hole so as to be bolted with a high-strength splice plate device; the high-strength splice plate device comprises a splice plate, a connecting plate and a rotating shaft; the number of the splice plates is 2N, and N is more than or equal to 2; the splice plates are tiled and arranged into two rows and N columns, the splice plates on each row are connected through the connecting plates, and the splice plates on each column are connected through the rotating shaft; the box top plate is connected with two splice plates positioned on the same row through bolts; the number of the box-shaped hoop devices is M, and M is more than or equal to 1 and less than or equal to N.
2. The method for using the safety walking system for manual inspection of the truss bridge as set forth in claim 1, comprising the steps of: step one, respectively bolting and fixing two rectangular hoop devices on two different diagonal web members or vertical rods positioned in the same cross section of a truss bridge;
step two, penetrating the high-strength steel wire rope through the movable safety sleeve, tensioning the high-strength steel wire rope, and respectively fixing two ends of the high-strength steel wire rope on the two rectangular hoop devices which are fixed in the step one;
thirdly, bolting and fixing the hoops of the M box-shaped hoop devices at the lower parallel connection position near the detected member, wherein M is more than or equal to 1;
step four, connecting 2N splice plates through a rotating shaft to form N pairs, bolting through a connecting plate, so that the 2N splice plates are in two rows and N columns which are horizontally laid, and bolting two splice plates positioned on the same column to a top plate of a box-shaped hoop device, wherein M is less than or equal to N;
step five, after the step four is completed, the hook at the end of the safety rope tied on the shoulders of the inspection personnel is fixed on the binding groove of the movable safety sleeve in a surrounding manner;
step six, the inspection personnel can inspect the waist when walking to a position according to the working requirement, and fix the safety rope end hooks tied on the waist on the perforated lug plate of the box-shaped hoop device closest to the waist.
3. The method of claim 2, wherein in the first step, the two rectangular hoop devices are horizontally arranged and are horizontally positioned to be flush with the shoulder height of the inspector.
4. A method according to claim 2 or 3, wherein in the second step, two ends of the high-strength steel wire rope are respectively fixed on the perforated lug plates of the two rectangular hoop devices fixed in the first step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910491194.2A CN110144819B (en) | 2019-06-06 | 2019-06-06 | Safe walking system for manual inspection of truss bridge and use method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910491194.2A CN110144819B (en) | 2019-06-06 | 2019-06-06 | Safe walking system for manual inspection of truss bridge and use method |
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| CN110144819A CN110144819A (en) | 2019-08-20 |
| CN110144819B true CN110144819B (en) | 2024-04-12 |
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