CN115162184A - Suspension bridge steel truss erecting system and method - Google Patents
Suspension bridge steel truss erecting system and method Download PDFInfo
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- CN115162184A CN115162184A CN202210886989.5A CN202210886989A CN115162184A CN 115162184 A CN115162184 A CN 115162184A CN 202210886989 A CN202210886989 A CN 202210886989A CN 115162184 A CN115162184 A CN 115162184A
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling 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
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension 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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
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Abstract
The application discloses an erection system and an erection method of a suspension bridge steel truss girder, which relate to the technical field of bridge construction, and comprise a tower crane support, wherein two ends of the tower crane support extend to two sides along a longitudinal bridge, and one extending end of the tower crane support is provided with a pulley mechanism; the walking device comprises a center-penetrating jack, a walking box body and a plurality of steel strands; the traction device comprises a winch and a plurality of steel wire ropes; and when the steel truss girder is hoisted to a set elevation through the steel wire rope by the hoisting machine, the steel truss girder is fixed to the steel strand of the traveling device instead of the steel wire rope of the traction device. The application discloses a novel system and a method for erecting a steel truss girder of a suspension bridge, which can be suitable for a large-span suspension bridge and have low requirements on terrain and channel transportation conditions.
Description
Technical Field
The application relates to the technical field of bridge construction, in particular to an erection system and an erection method of a steel truss girder of a suspension bridge.
Background
At present, the erection method of the suspension bridge steel truss girder mainly comprises a cable crane method and a cable carrying crane method. When a suspension bridge is built across a river or sea, the stiffening beam is generally transported to the bridge position by a ship, and is vertically lifted and erected by a cable crane. A suspension bridge is built across canyons in mountainous areas, because the terrain of two banks is steep, the transportation condition is poor, the construction site is narrow, meanwhile, rivers at the bridge position are shallow, the river surface is narrow, the navigation cannot be realized, and the erection of the steel truss girder mainly adopts a cable crane method.
In the related technology, the cable crane method is to use the main tower and the landform on both sides of the suspension bridge to set up a cable crane system consisting of an anchor, a tower frame, a bearing cable, a crown block, a traction system and the like, and use the cable crane to transport, lift and install the main truss sheet. The construction method of the cable crane is technically mature, but the defects of the cable crane are obvious, a plurality of bearing cables are required to be built between main towers, a crown block is hung on the bearing cables, the crown block is unpowered, and traction systems on two sides of the bearing cables are required to provide traction. Along with the increase of the span of the suspension bridge, the construction cost of the cable crane construction method is obviously improved, the construction safety is greatly reduced, and the construction method has no economy for the suspension bridge construction with the main span of more than 900 m.
The cable crane method is that a crane is arranged on a main cable, a steel truss is vertically lifted to a designed elevation through a lifting system on the crane, and then a suspender is installed to complete the erection of the steel truss of a single section; the cable carrying crane runs along the main cable without additionally arranging a bearing cable, the crane is provided with a power system, and when the erection of one section of steel truss girder is completed, the crane can run to the position to be erected of the next section of steel truss girder in an idle load mode through the power system of the crane to erect the next section of steel truss girder. The cable crane method can be used for construction of a suspension bridge with a main span of over 900m, but the cable crane method generally transports steel truss sections to a bridge position by adopting ships and the like, utilizes the cable crane to vertically lift, generally requires that a water area or a terrain below a main cable is flat, and has high requirements on terrain and channel transportation conditions. When the main span of the suspension bridge exceeds 900m and the topography of the water area is not flat below the main cable, no erection method can complete the erection of the steel truss girder of the suspension bridge at home and abroad at present.
Therefore, a new erection method is urgently needed to be designed by those skilled in the art, which can adapt to a large-span suspension bridge and has low requirements on the terrain and the channel transportation conditions.
Disclosure of Invention
Aiming at the defects in the prior art, the application aims to provide a system and a method for erecting a suspension bridge steel truss girder, and discloses a novel system and a method for erecting a suspension bridge steel truss girder, which can be suitable for a large-span suspension bridge and have low requirements on landform and channel transportation conditions.
In order to achieve the purposes, the technical scheme is as follows: an erection system of a suspension bridge steel truss girder, comprising: the suspension device comprises a tower crane support, the tower crane support is arranged at the top end of a main tower of the suspension bridge, two ends of the tower crane support extend to two sides along the longitudinal bridge, and one extending end of the tower crane support is provided with a pulley mechanism;
the walking device comprises a center-penetrating jack, a walking box body and a plurality of steel strands, wherein a plurality of walking wheels for walking along a main cable of the suspension bridge are arranged on the bottom surface of the walking box body, and the center-penetrating jack is vertically fixed on the top surface of the center-penetrating jack; the steel strand penetrates through the center-penetrating jack;
the traction device comprises a winch and a plurality of steel wire ropes, and the winch is fixed on the tower crane bracket; part of the steel wire rope is used for hoisting the steel truss girder and is connected to the winch through a pulley structure at the side end of the tower crane bracket; the other part of the steel wire rope is connected with the traveling box body and the winch;
and when the steel truss girder is hoisted to a set elevation through the steel wire rope by the hoisting machine, the steel truss girder is fixed to the steel strand of the traveling device instead of the steel wire rope of the traction device.
On the basis of the technical scheme, the erection system further comprises a rail, the bottom surface of the rail is fixed on the main cable, and the walking wheels are slidably mounted on the top surface of the rail; the track comprises a plurality of track segment units;
and in the process that the walking device drives the steel truss girder to walk to a far place from a position adjacent to the main tower along the track, the rail section unit behind the walking device is detached and installed in front of the walking device.
On the basis of the technical scheme, the erection system also comprises a plurality of detachable temporary clamping devices in a claw shape, the temporary clamping devices are arranged on the bottom surface of the track, and the temporary clamping devices are used for hooping the main cable; the temporary clamping device is arranged on the track at intervals of a set distance.
On the basis of the technical scheme, the erection system further comprises a catwalk platform, the catwalk platform is arranged below the main cable in parallel, and the catwalk platform is used for bearing tools and tool parts required by a lifting walking system.
On the basis of the technical scheme, the erection system further comprises a traction cable assembly, the traction cable assembly is tensioned above the main cable, and the traction cable assembly is used for conveying the suspension rod.
The application also discloses an erection method of the erection system based on the suspension bridge steel truss girder, which comprises the following steps:
s1: a tower crane support is arranged at the top end of a main tower of the suspension bridge, and a pulley mechanism is arranged at one extending end of the tower crane support; installing a running gear on a main cable adjacent to a main tower; the top ends of the main towers at two sides of the steel truss girder to be installed are respectively provided with windlasses of a traction device, and the two windlasses are fixed at two ends of the traveling box body through steel wire ropes;
s2: the steel truss girder is transferred to a hoisting point on the ground, and the steel truss girder is hoisted to a set elevation by a winch through a steel wire rope and a pulley mechanism;
s3: fixing the steel truss girder to the bottom end of the steel strand, and dismantling a steel wire rope on the steel truss girder;
s4: starting a winch at two banks of the steel truss girder to be installed, and driving the steel truss girder to move to a midspan design position along the longitudinal bridge direction by a traveling device; meanwhile, transporting the corresponding hanger rods of the steel trussed beams to midspan design positions; and (5) installing a suspender, and transferring the steel truss girder from the steel strand fixing to the suspender fixing.
On the basis of the technical scheme, the erection system further comprises a rail, the bottom surface of the rail is fixed on the main cable, and the walking wheels are slidably mounted on the top surface of the rail; the track comprises a plurality of track segment units;
step S1 comprises the steps of laying a track along a main cable, and arranging a walking wheel below a walking box body on the track in a sliding manner;
and S4, in the process that the travelling device drives the steel truss girder to travel along the track, detaching and paving the steel truss girder while travelling, detaching the rail section unit behind the travelling device, and installing the rail section unit in front of the travelling device.
On the basis of the technical scheme, the erection system also comprises a plurality of detachable temporary clamping devices in a claw shape, the temporary clamping devices are arranged on the bottom surface of the track, and the temporary clamping devices are used for hooping the main cable; the temporary clamping devices are arranged on the rails at intervals of a set distance.
On the basis of the technical scheme, the erection system further comprises a catwalk platform, the catwalk platform is arranged below the main cable in parallel, and the catwalk platform is used for bearing workers and tool parts needed by a lifting walking system; the erection system further comprises a pull cable assembly tensioned over the main cable, the pull cable assembly being used to transport the boom;
in step S1, the rail segment units, temporary grippers and cable clamps of the track are all transported and installed through catwalk platforms;
in step S4, all the transportation and installation work of the boom is completed by the tow rope assembly.
The technical scheme who provides this application brings beneficial effect includes:
according to the erection system and the erection method of the suspension bridge steel truss girder, the main cable is used as a walking channel, the main cable does not have an automatic power device, and a winch and a steel wire rope are used for providing power to carry out walking motion; compared with a cable crane method, the method does not need to increase a plurality of bearing cables, is suitable for a large-span suspension bridge, and has good economical efficiency; according to the erection system, the travelling device has the ability of walking the steel trussed beams, the steel trussed beams are lifted to a set elevation by the traction device and the hanging device and then are fixed to the steel stranded wires of the travelling device, so that the steel trussed beams are fixed to the travelling device through the steel stranded wires, the steel trussed beams are lifted upwards from the position adjacent to the main tower all the time, no requirements are made on the landforms and the channels of other positions below the main cables, and the requirements on the landforms and the channel transportation conditions are low.
The reason why the cable car of the cable crane method in the prior art can only travel in no-load mode is that the cable car can travel with the steel truss girder is that firstly, the ascending process of the cable car is realized by matching the hanging device with the traction device, and the traveling device is only responsible for traveling; the walking device is not provided with automatic power equipment, so that the weight is greatly reduced, the center of gravity is deviated to the steel truss girder, and the walking device is safer and more stable; secondly, a special track for the walking device is laid, the special track can be perfectly matched with walking wheels of the walking box body, the stress is excellent, and the walking performance is good; meanwhile, the track is arranged in sections, and the track is paved while being disassembled, so that the cost of the track is greatly saved, and the economical efficiency is good.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic vertical lifting elevation of a steel truss girder of a suspension bridge provided in an embodiment of the present application;
fig. 2 is a schematic vertical transport view of a suspension bridge steel truss girder provided in an embodiment of the present application in a longitudinal direction of a bridge;
fig. 3 is a schematic view of a suspension bridge mounting boom provided in an embodiment of the present application;
fig. 4 is an elevation schematic view of a catwalk platform and a tow cable assembly of a steel truss girder of a suspension bridge provided in an embodiment of the present application;
fig. 5 is a schematic hoisting diagram of a closure segment of a suspension bridge provided in the embodiment of the present application;
reference numerals:
1. a tower crane bracket; 2. a running gear; 3. a track; 4. a traction device; 5. a temporary gripper; 6. a main cable; 7. a catwalk platform; 8. a pull cable assembly; 9. a main tower; 10. a steel truss beam; 11. a boom; 21. a center-penetrating jack; 22. a traveling box body; 23. a running wheel; 24. steel strand wires; 42. a winch; 41. a wire rope; 74. a panel layer; 73. a handrail cable; 72. a protective cable; 71. a load bearing cable; 8. a pull cable assembly; 81. a gantry bearing cable; 82. a gantry traction cable.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, 2 and 3, the present application discloses an embodiment of an erection system for a steel truss girder of a suspension bridge, which can be applied to a large-span suspension bridge and has low requirements on the terrain and the channel transportation conditions; compared with a cable crane method which needs to install a large number of bearing cables, the main bearing body of the erection system still adopts the main cable 6; compared with a crane with a cable-carried crane method, the crane with the cable-carried crane method has the advantages that the crane with the cable-carried crane method runs with power equipment, and the erection system has no power running equipment; the cable crane method can only carry out no-load walking and vertically and upwards hoisting, and has high requirements on the terrain below the bridge and the transportation conditions of the channel; the erection system of this application can take the steel longeron subsection to walk together, requires lowly to topography and the channel transportation condition below the bridge.
The erection system comprises a hanging device, a walking device 2 and a traction device 4, the hanging device comprises a tower crane support 1, the tower crane support 1 is arranged on the top end of a main tower 9 of the suspension bridge, two ends of the tower crane support 1 extend to two sides along the longitudinal bridge, and one of the two ends extends to form a pulley mechanism.
The walking device 2 comprises a center-penetrating jack 21, a walking box body 22 and a plurality of steel strands 24, wherein a plurality of walking wheels 23 are arranged on the bottom surface of the walking box body 22, and the walking wheels 23 are used for walking along the main cable 6 of the suspension bridge. The center-penetrating jack 21 is vertically fixed on the top surface of the center-penetrating jack 21, and the center-penetrating jack 21 is adjusted along with the center-penetrating jack in the running process of the running wheels 23, but always kept in a vertical state. The steel strand wires 24 penetrate through the center-penetrating jacks 21 and are used for connecting the steel trusses. The steel truss girder is firstly hung to a designed height through the hanging device and then is fixed at the bottom end of the steel strand 24, and the weight of the steel truss girder is transferred to the walking device 2.
The traction device 4 comprises a winch 42 and a plurality of steel wire ropes 41, and the winch 42 is fixed on the tower crane bracket 1; a part of the steel cable 41 is used for hoisting the steel truss girder 10, one end of the part of the steel cable 41 is connected to the steel cable 41, the other end of the part of the steel cable 41 passes through the pulley structure at the side end of the tower crane support 1 and extends downwards, and the winch 42 hoists the steel truss girder 10 through the part of the steel cable 41. The other part of the wire rope 41 connects the traveling box 22 and the hoist 42, and specifically, one end of the part of the wire rope 41 is connected to the hoist 42, and the other end is connected to the end of the traveling box 22, and the hoist 42 moves the traveling box 22 through the part of the wire rope.
Specifically, when the steel truss between the two main towers 9 is erected, the traction device 4 is provided with a winch 42 and a plurality of steel wire ropes 41 on the two main towers 9, and the winch 42 of the two main towers 9 pulls the traveling box 22 to move in an idle load manner or the traveling box 22 moves together with the steel truss through the steel wire ropes 41.
When the steel girder 10 is hoisted to a set elevation by the hoist 42 through the wire rope 41, the steel girder 10 is turned from the wire rope 41 of the traction device 4 to be fixed to the steel strand 24 of the running device 2.
The erection system of the suspension bridge steel truss girder walks on the main cable 6, the walking device 2 does not have an automatic power device, and the winch 42 and the steel wire rope 41 are used for providing power to perform walking motion;
the erection system still adopts the main cable 6 as a walking channel, does not need to increase a plurality of bearing cables compared with a cable crane method, is suitable for a large-span suspension bridge, and has good economical efficiency; according to the erection system, the traveling device 2 has the capability of traveling of the strip steel truss girder, the steel truss girder 10 is lifted to a set elevation by the traction device 4 and the hanging device, and then is fixed to the steel strand 24 of the traveling device 2, so that the steel truss girder is fixed to the traveling device 2 through the steel strand 24, the steel truss girder 10 is lifted upwards from the position adjacent to the main tower all the time, and no requirement is imposed on the topography and the channel of other positions below the main cable. And therefore the cable car of the cable crane method of the prior art can only carry on the no-load walking, one of the main reasons that the erection system of this application can walk together with belted steel longeron lies in: the ascending process is realized by matching the hanging device with the traction device 4, and the walking device 2 is only responsible for walking; and the running gear 2 is not provided with automatic power equipment, so that the weight is greatly reduced, the gravity center is deviated to the steel truss girder, and the steel truss girder is safer and more stable.
In one embodiment the erection system further comprises a rail 3, the bottom surface of the rail 3 being fixed to the main cable 6 of the suspension bridge, and running wheels 23 being slidably mounted on the top surface of the rail 3. The track 3 comprises a plurality of track segment units; while the running gear 2 is running far from the position adjacent to the main tower 9 along the rail 3 with the steel girder 10, the rail 3 is laid while running, and the rail segment unit behind the running gear 2 (behind the running direction) is removed and attached to the front of the running gear 2 (ahead of the running direction). In particular, the length of the rail 3 is only slightly greater than the length of the running carriages 22. Preferably, the length of the rail 3 is twice the length of the running carriages 22.
The erection system of the application breaks through the cable car of the cable crane method in the prior art and can only walk in no-load, and the second main reason that the running device 2 can walk together with the steel truss beam is that: according to the erection system, the special track 3 for the walking device 2 is laid, the special track 3 can be perfectly matched with the walking wheels 23 of the walking box body 22, the stress is excellent, and the walking performance is good; meanwhile, the track 3 is arranged in sections, and the track is paved while being disassembled, so that the cost of the track 3 is greatly saved, and the economical efficiency is good.
Further, the erection system further comprises a temporary gripper 5 in the shape of a claw, the temporary gripper 5 being fixed to the bottom surface of the rail for gripping the main cable 6. The temporary holder 5 is detachable. On the premise of avoiding the cable clamp on the main cable, the track 3 is provided with a temporary clamp 5 at a set interval. The set pitch is determined by calculation based on the strength and stiffness of the track 3.
Preferably, at least one removable temporary holder 5 is provided on the underside of each rail segment unit.
In one embodiment, the erection system further comprises a catwalk platform 7, the catwalk platform 7 is arranged in parallel below the main cable 6, and the catwalk platform 7 is used for bearing workers and tool parts required by the lifting walking system. Specifically, the track 3, temporary gripper 5, cable clamp, etc. are all installed for the human work platform with catwalk platform 7.
Further, the catwalk platform 7 further comprises a panel layer 74, an armrest cable 73, a protective cable 72 and a bearing cable 71; a plurality of bearing cables 71 are formed to lie in a plane parallel to the main cable 6, and a panel layer 74 is laid on the top of all the bearing cables 71 to form a construction platform. The panel layer 74 is provided with strip-shaped holes for avoiding the steel strands, so that interference of the steel strands is avoided. In the process of installing the track 3, the temporary clamper 5, the cable clip and the like on the catwalk platform 7, a strip-shaped hole in the panel layer 74 is used for laying a wood board and the like, and in the process of walking the steel truss beam on the walking device 2, the wood board and the like are uncovered. The handrail cables 73 and the protective cables 72 are stretched on two sides of the panel layer 74 to play a role of a protective guard, prevent construction personnel from accidents and improve safety performance.
As shown in fig. 4, in one embodiment, the erection system further comprises a tow cable assembly 8, the tow cable assembly 8 being tensioned over the main cable 6, the tow cable assembly 8 being used to transport the boom 11.
Specifically, the pull cable assembly 8 includes two mast support cables 81 and two mast pull cables 82. Specifically, when the traveling device 2 travels to a set position with the steel truss, the tow rope assembly 8 transports the boom 11, fixes the top end of the boom 11 to the rope clip on the main cable, fixes the bottom end of the boom 11 to the steel truss, and then releases the bottom end of the steel strand from the steel truss to convert the weight of the steel truss to the boom 11.
As shown in fig. 1, 2, 3 and 5, the present application further discloses an embodiment of an erection method of an erection system based on the suspension bridge steel truss, comprising the following steps:
s1: a tower crane support 1 is arranged at the top end of a main tower 9 of a suspension bridge, and a pulley mechanism is arranged at one extending end of the tower crane support 1; installing running gear 2 on main cable 6 adjacent to main tower 9; the top ends of the main towers at two banks of the steel truss girder 10 to be installed are respectively provided with the windlasses 42 of the traction device 4, and the two windlasses 42 are fixed at two ends of the traveling box body 22 through the steel wire rope 41, so as to achieve the purpose of longitudinal traveling of the traveling box body 22.
S2: the steel truss 10 is transported on the ground to the lifting point, i.e. below the main cable adjacent to the main tower 9. The winch 42 hoists the steel truss 10 to a set elevation through the steel wire rope 41 and the pulley mechanism of the tower crane support 1;
s3: fixing the steel truss girder 10 to the bottom end of the steel strand 24 of the running gear 2, and removing the steel wire rope 41 on the steel truss girder 10; at this time, the steel truss 10 is supported by the steel wire rope 41 of the traction apparatus 4, and is supported by the steel strand 24 of the traveling apparatus 2 instead.
S4: starting the winches 42 at the two banks, and moving the walking device 2 to a midspan design position along the longitudinal bridge direction; simultaneously, transporting boom 11 to a midspan design position; installing the hanger rods 11, gradually lowering the steel trussed beams 10 through the steel stranded wires 24, and transferring the steel trussed beams 10 from the steel stranded wires 24 to the hanger rods 11 for fixation, so that the erection of the steel trussed beams is completed, and the rest work is only needed to connect two sections of the steel trussed beams in a butt joint manner.
The application discloses a novel suspension bridge steel truss girder erection method, which is different from the conventional cable crane method and cable-carrying crane method, and is applicable to large-span suspension bridges and has low requirements on terrain and channel transportation conditions; according to the erection method, the traveling device 2 is installed on the main cable 6, the traction device 4 is used for completing the lifting work of the steel truss girder, then the steel truss girder is transferred to the steel stranded wire 24 of the traveling device 2, then the steel stranded wire is used for driving the steel truss girder 10 to walk towards the midspan until the steel stranded wire walks to the midspan design position, and then the steel truss girder 10 is transferred to the hanging rod 11, so that the erection work is completed.
According to the erection method, the main cable 6 is still used as a walking channel, and compared with a cable crane method, a plurality of bearing cables do not need to be added, so that the erection method is suitable for a large-span suspension bridge, and is good in economical efficiency; according to the erection system, the traveling device 2 has the ability of traveling the steel trussed beams, the steel trussed beams 10 are lifted to a set elevation by the traction device 4 and the hanging device, and then are fixed to the steel stranded wires 24 of the traveling device 2, so that the steel trussed beams are fixed to the traveling device 2 through the steel stranded wires 24, the steel trussed beams 10 are lifted upwards from the position adjacent to the main tower all the time, and no requirement is imposed on the landforms and the navigation channels of other positions below the main cables.
One of the main reasons that the erection method can lead the strip steel truss to walk together lies in that: the lifting process is realized by matching the hanging device with the traction device 4, and the walking device 2 is only responsible for walking; and the walking device 2 is not provided with automatic power equipment, so that the weight is greatly reduced, the gravity center is deviated to the steel truss girder, and the walking device is safer and more stable.
The second reason is that: according to the erection system, the special track 3 for the walking device 2 is laid, the special track 3 can be perfectly matched with the walking wheels 23 of the walking box body 22, the stress is excellent, and the walking performance is good; meanwhile, the track 3 is arranged in sections, and the track is paved while being disassembled, so that the cost of the track 3 is greatly saved, and the economical efficiency is good.
In one embodiment, the erection system further comprises rails 3, the bottom surfaces of the rails 3 are fixed to the main cables 6 of the suspension bridge, and running wheels 23 are slidably mounted on the top surfaces of the rails 3. The track 3 comprises a plurality of track segment units; when the running gear 2 is running far from the position adjacent to the main tower 9 along the rail 3 with the steel girder 10, the rail 3 is laid while running, and the rail segment unit behind the running direction behind the running gear 2 is removed and mounted ahead of the running direction ahead of the running gear 2.
Step S1 comprises laying a rail 3 along the main cable 6, and slidably arranging a traveling wheel 23 below the traveling box body 22 on the rail 3;
in step S4, while the running gear 2 is running along the rail 3 with the steel truss 10, the rail segment unit behind the running gear 2 is removed and installed in front of the running gear 2 while the track is being removed.
In one embodiment, the erection system further comprises a temporary gripper 5 in the form of a claw, the temporary gripper 5 being fixed to the bottom surface of the rail for gripping the main cable 6. The temporary holder 5 is detachable. On the premise of avoiding the cable clamp on the main cable, the track 3 is provided with a temporary clamp 5 at a set interval. The set pitch is determined by calculation based on the strength and stiffness of the track 3.
In one embodiment, the erection system further comprises a catwalk platform 7, the catwalk platform 7 is arranged in parallel below the main cable 6, and the catwalk platform 7 is used for bearing workers and tool parts required by the lifting walking system. Specifically, the track 3, temporary gripper 5, cable clamp, etc. are all installed for the human work platform with catwalk platform 7.
Further, the catwalk platform 7 further comprises a panel layer 74, an armrest rope 73, a protective rope 72 and a bearing rope 71; a plurality of bearing cables 71 are formed to lie in a plane parallel to the main cable 6, and a panel layer 74 is laid on the top of all the bearing cables 71 to form a construction platform. The panel layer 74 is provided with a strip-shaped hole for avoiding the steel strand, so that interference of the steel strand is avoided. In the process of installing the track 3, the temporary clamper 5, the cable clip and the like on the catwalk platform 7, a wood plate and the like are used to be laid in the strip-shaped holes of the panel layer 74, and in the process of running the steel truss girder of the running gear 2, the wood plate and the like are uncovered. The handrail cables 73 and the protective cables 72 are stretched on two sides of the panel layer 74 to play a role of a protective guard, prevent construction personnel from accidents and improve safety performance.
The erection system further comprises a tow cable assembly 8, the tow cable assembly 8 being tensioned over the main cable 6, the tow cable assembly 8 being used to transport the boom 11.
Specifically, the tow cable assembly 8 includes two mast support cables 81 and two mast tow cables 82. Specifically, when the traveling device 2 travels to a set position with the steel truss, the tow rope assembly 8 transports the boom 11, fixes the top end of the boom 11 to the rope clip on the main cable, fixes the bottom end of the boom 11 to the steel truss, and then releases the bottom end of the steel strand from the steel truss to convert the weight of the steel truss to the boom 11.
In step S1, the rail segment units of the track 3, the temporary grippers 5 and the cable clamps are all transported and installed by the catwalk platform 7.
In step S4, all boom 11 transport and installation work is done by the tow rope assembly 8.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. An erection system of a suspension bridge steel truss girder, comprising:
the hanging device comprises a tower crane support (1), the tower crane support (1) is arranged at the top end of a main tower (9) of the suspension bridge, two ends of the tower crane support (1) extend to two sides along the longitudinal bridge, and one extending end of the tower crane support is provided with a pulley mechanism;
the walking device (2) comprises a center-penetrating jack (21), a walking box body (22) and a plurality of steel stranded wires (24), wherein the bottom surface of the walking box body (22) is provided with a plurality of walking wheels (23) used for walking along a main cable (6) of the suspension bridge, and the center-penetrating jack (21) is vertically fixed on the top surface of the center-penetrating jack (21); the steel strand (24) penetrates through the center-penetrating jack (21);
the traction device (4) comprises a winch (42) and a plurality of steel wire ropes (41), wherein the winch (42) is fixed on the tower crane bracket (1); a part of the steel wire rope (41) is used for hoisting the steel truss girder (10) and is connected to a winch (42) through a pulley structure at the side end of the tower crane support (1); the other part of the steel wire rope (41) is connected with the traveling box body (22) and the winch (42);
when the steel truss girder (10) is hoisted to a set elevation through the steel wire rope (41) by the hoisting machine (42), the steel truss girder (10) is turned and fixed to the steel stranded wire (24) of the traveling device (2) from the steel wire rope (41) of the traction device (4).
2. An erection system for a steel truss of suspension bridge as defined in claim 1 wherein: the erection system also comprises a rail (3), the bottom surface of the rail (3) is fixed on the main cable (6), and the walking wheels (23) can be slidably arranged on the top surface of the rail (3); the track (3) comprises a plurality of track segment units;
in the process that the walking device (2) carries the steel truss girder (10) to walk to a far place from a position adjacent to the main tower (9) along the track (3), the rail section unit behind the walking device (2) is detached and installed in front of the walking device (2).
3. An erection system for a steel truss of suspension bridge as defined in claim 2 wherein: the erection system also comprises a plurality of claw-shaped detachable temporary holders (5), the temporary holders (5) are arranged on the bottom surface of the track (3), and the temporary holders (5) are used for hooping the main cable (6); the temporary clamping device (5) is arranged on the track (3) at intervals of a set distance.
4. An erection system for a steel truss of suspension bridge as defined in claim 1 wherein: the erection system further comprises a catwalk platform (7), wherein the catwalk platform (7) is arranged below the main cable (6) in parallel, and the catwalk platform (7) is used for bearing workers and tool parts needed by the lifting walking system.
5. An erection system for a steel truss of suspension bridge as defined in claim 1 wherein: the erection system further comprises a tow cable assembly (8), the tow cable assembly (8) being tensioned over the main cable (6), the tow cable assembly (8) being for transporting the boom (11).
6. An erection method of an erection system of a steel truss girder of a suspension bridge based on claim 1, comprising the steps of:
s1: a tower crane support (1) is arranged at the top end of a main tower (9) of the suspension bridge, and a pulley mechanism is arranged at one extending end of the tower crane support (1); mounting running gear (2) on the main cable (6) adjacent to the main tower (9); winches (42) of a traction device (4) are respectively installed at the top ends of main towers (9) at two banks of a steel truss beam (10) to be installed, and the two winches (42) are fixed at two ends of a traveling box body (22) through steel wire ropes (41);
s2: the steel truss girder (10) is transferred to a lifting point on the ground, and a winch (42) lifts the steel truss girder (10) to a set elevation through a steel wire rope (41) and a pulley mechanism;
s3: fixing the steel truss girder (10) to the bottom end of the steel strand (24), and removing a steel wire rope (41) on the steel truss girder (10);
s4: starting winches (42) at two banks of the steel truss girder (10) to be installed, and driving the steel truss girder (10) to move to a midspan design position along the longitudinal bridge direction by a traveling device (2); meanwhile, the corresponding suspension rods (11) of the steel truss girder (10) are transported to a midspan design position; and (3) installing a suspender (11), and transferring the steel truss girder (10) from the steel strand (24) to the suspender (11) for fixation.
7. An erection method of an erection system of a steel girder of a suspension bridge as claimed in claim 6, wherein: the erection system also comprises a rail (3), the bottom surface of the rail (3) is fixed on the main cable (6), and the walking wheels (23) can be slidably arranged on the top surface of the rail (3); the track (3) comprises a plurality of track segment units;
step S1 comprises the steps of laying a track (3) along a main cable (6), and arranging a traveling wheel (23) below a traveling box body (22) on the track (3) in a sliding manner;
in the step S4, in the process that the walking device (2) carries the steel truss girder (10) to walk along the track (3), the steel truss girder is disassembled and paved while walking, and the track section unit behind the walking device (2) is disassembled and installed in front of the walking device (2).
8. An erection method of an erection system of a steel girder of a suspension bridge as claimed in claim 7, wherein: the erection system also comprises a plurality of claw-shaped detachable temporary clamps (5), the temporary clamps (5) are arranged on the bottom surface of the track (3), and the temporary clamps (5) are used for hooping the main cable (6); the track (3) is provided with a temporary clamper (5) at intervals of a set distance.
9. An erection method of an erection system of a steel truss girder for a suspension bridge as claimed in claim 8, wherein: the erection system further comprises a catwalk platform (7), wherein the catwalk platform (7) is arranged below the main cable (6) in parallel, and the catwalk platform (7) is used for bearing workers and tool parts required by the hoisting walking system; the erection system further comprises a haulage cable assembly (8), the haulage cable assembly (8) being tensioned over the main cable (6), the haulage cable assembly (8) being used for transporting a boom (11);
in step S1, the rail segment units, temporary holders (5) and cable clamps of the track (3) are all transported and installed by a catwalk platform (7);
in step S4, all the transportation and installation work of the suspension rod (11) is completed through the traction cable assembly (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210886989.5A CN115162184A (en) | 2022-07-26 | 2022-07-26 | Suspension bridge steel truss erecting system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210886989.5A CN115162184A (en) | 2022-07-26 | 2022-07-26 | Suspension bridge steel truss erecting system and method |
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| CN115162184A true CN115162184A (en) | 2022-10-11 |
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| CN202210886989.5A Pending CN115162184A (en) | 2022-07-26 | 2022-07-26 | Suspension bridge steel truss erecting system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117776001A (en) * | 2024-02-26 | 2024-03-29 | 贵州省公路工程集团有限公司 | Suspension bridge pin joint type sling lifting system and installation method |
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2022
- 2022-07-26 CN CN202210886989.5A patent/CN115162184A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117776001A (en) * | 2024-02-26 | 2024-03-29 | 贵州省公路工程集团有限公司 | Suspension bridge pin joint type sling lifting system and installation method |
| CN117776001B (en) * | 2024-02-26 | 2024-05-03 | 贵州省公路工程集团有限公司 | Suspension bridge pin joint type sling lifting system and installation method |
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