CN113802460A - 40-meter 1000t OU-shaped supporting leg tunnel portal zero-distance beam erecting and bridge erecting machine and construction process - Google Patents
40-meter 1000t OU-shaped supporting leg tunnel portal zero-distance beam erecting and bridge erecting machine and construction process Download PDFInfo
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Abstract
The application relates to a 40-meter 1000t 'OU' type supporting leg tunnel portal zero-distance bridge girder erection machine, which comprises a bridge girder erection machine, wherein the lower part of the bridge girder erection machine is sequentially provided with a front supporting leg, a hoisting crown block movably connected to the upper half part of the girder, an auxiliary middle supporting leg and a rear supporting leg from front to back, and a transition support, wherein the front supporting leg is in an inverted triangle structure form, the front view of the hoisting crown block is in an omega shape, the auxiliary middle supporting leg is arranged at the middle bottom of the bridge girder erection machine and is hinged to the girder, the rear supporting leg is in an O shape when seen from the vertical face and is in a U shape when seen from the plane, the transition support is a hydraulic telescopic support arranged at the rear end of the bridge girder erection machine, the rear end of the bridge girder erection machine is provided with a tail winch and a generator, and the tail winch provides a hoisting driving device for the front hoisting crown block; the front end of the main beam of the bridge erecting machine is provided with a front winch which provides lifting power for a rear lifting crown block. This application has self-balancing via hole function, does not need other supplementary machines, the simple convenient effect of via hole mode.
Description
Technical Field
The invention relates to the technical field of tunnel-passing bridge girder erection machines, in particular to a 1000t tunnel portal zero-distance girder erection bridge girder erection machine.
Background
Along with the design of the high-speed railway bridge in China is upgraded to 40m span by 32m span to and pitch upward in the tunnel and supply layer needs and tunnel one shot forming's requirement, the tunnel bridging machine of crossing that can erect 1000t now is mostly two girder bridging machines, need disassemble moreover mostly just can pass through the tunnel, can't accomplish the interior feed beam of tunnel.
Most of hoisting crown blocks of the existing single-girder 1000t bridge girder erection machine are hung below the girder, and transmission is carried out by gear and rack transmission, so that the driving mode has the disadvantages of poor safety and reliability, high failure rate, difficulty in maintaining racks fixed on the girder and potential safety hazards.
The rear supporting legs of the conventional single-girder 900t bridge girder erection machine are of an O-shaped structure which is folded backwards, and zero-distance erection of the section of a straight-cut tunnel cannot be completed.
Disclosure of Invention
In order to overcome the technical problem, the application provides a 40-meter 1000t 'OU' type supporting leg tunnel portal zero-distance girder erection and bridge erecting machine.
On the one hand, the zero-distance girder erection and bridge erecting machine with 40 meters and 1000t 'OU' type supporting leg tunnel portal provided by the application adopts the following technical scheme:
a40-meter 1000t 'OU' type supporting leg tunnel portal zero-distance girder erection bridge girder erection machine comprises a main girder of the bridge girder erection machine, wherein the lower part of the main girder of the bridge girder erection machine is sequentially provided with a front supporting leg, a hoisting overhead traveling crane movably connected to the upper half part of the main girder, an auxiliary middle supporting leg, a rear supporting leg and a transition support from front to back, the front supporting leg is in an inverted triangle structure form, the hoisting overhead traveling crane comprises a front hoisting overhead traveling crane and a rear hoisting overhead traveling crane which are arranged at the front and back positions of the top of the main girder, the front view of the hoisting overhead traveling crane is in an omega shape, the auxiliary middle supporting leg is arranged at the middle bottom of the main girder of the bridge girder erection machine and is hinged to the main girder, the rear supporting leg is in an O shape from the vertical face and in a U shape from the plane, the transition support is a hydraulic telescopic support arranged at the rear end of the main girder of the bridge girder erection machine, a power bracket is arranged at the rear end of the main girder of the bridge girder, a hoisting tail part and a generator and a driving device for providing power for hoisting of the hoisting overhead traveling crane for hoisting of the front hoisting overhead traveling crane, the generator provides energy for the whole machine; the front end of the main beam of the bridge erecting machine is provided with a front winch which provides lifting power for a rear lifting crown block.
Preferably, the front supporting leg is in an inverted triangle structure form and comprises a horizontal plane upper framework, a main telescopic upright post plane framework and an inclined strut plane framework which are connected through a shaft hinge, and the horizontal plane upper framework, the main telescopic upright post plane framework and the inclined strut plane framework form a stable triangle structure system; and a carrier roller wheel system and an anti-grabbing wheel system are arranged above the front support leg, and the front support leg is movably connected with the main beam of the bridge erecting machine through the carrier roller wheel system and the anti-grabbing wheel system.
Preferably, preceding landing leg is including being located the horizontal plane on the preceding landing leg on framework upper portion walk to move mechanism and hanging wheel mechanism, preceding landing leg is walked to move the mechanism and is distributed on the horizontal plane on the framework be on a parallel with bridge girder erection machine girder fore-and-aft direction both sides, preceding landing leg still includes drive mechanism, drive mechanism includes the back running roller that is on a parallel with bridge girder erection machine girder length direction both sides, preceding running roller, drive pinch roller, driven pinch roller.
Preferably, the structural form of the rear leg support is an inverted L-shaped structure when viewed from the side, an O-shaped structure when viewed from the vertical surface, a U-shaped structure when viewed from the top, and an inverted L-shaped OU-shaped rear leg support structure is synthesized; the rear supporting leg comprises a rear supporting leg upper cross beam, a rear supporting leg turning arm section, a left hydraulic telescopic upright post, a right hydraulic telescopic upright post, a telescopic upright post hydraulic system, a rear supporting leg bottom cross beam, a rear supporting leg walking mechanism, a bottom cross beam jacking mechanism, a rear supporting leg rotating mechanism and a rear supporting leg transition track bridge; the rear leg bottom cross beam is provided with a rear leg walking mechanism and a rear leg transition track bridge; when a beam is erected, the bottom cross beam jacking mechanism extends out and is supported on the bridge floor, the rear support leg walking mechanism and the bridge floor are supported by steel pad piers, the top of the rear support leg bottom cross beam is provided with a beam carrying trolley walking track, the front part of the rear support leg bottom cross beam is provided with a rear support leg rotating mechanism, the tail part of the rear support leg bottom cross beam is provided with a track cross beam and a rear support leg transition track bridge, and the rear support leg rotating mechanism, the rear support leg transition track bridge and the track cross beam enable the hoisting crown block to be butted with the beam transporting vehicle to complete the dragging and beam feeding actions.
Preferably, the hoisting overhead traveling crane comprises a frame, a fixed pulley block, a sliding vehicle, a sprocket box mechanism, a forced guide wheel and a transverse moving mechanism; the longitudinal movement of the hoisting crown block is that a chain wheel box mechanism drives a sliding vehicle to move back and forth on the top of a main beam of the bridge girder erection machine, and a fixed pulley block moves transversely synchronously left and right along a frame cross beam through the expansion of an oil cylinder.
On the other hand, a construction process, S0, preparing a girder transporting vehicle for carrying the bridge girder erection machine before passing through the tunnel;
the method comprises the following steps that 1, preparation work before a girder transporting vehicle carries a bridge girder erection machine to pass through a tunnel is carried out, a transition support extends out to be fixedly connected with a girder carrying trolley on the girder transporting vehicle, the girder transporting vehicle moves forwards, the upper girder carrying trolley moves backwards synchronously, auxiliary middle support legs are supported to the upper part of the girder transporting vehicle in a turning mode and fixedly connected through bolts;
2. the front hoisting crown block moves to the position above the beam transporting vehicle through the rear supporting leg, and the front supporting leg is folded to pass through the tunnel;
3. the bridge girder erection machine is converted into a low-position tunnel passing state by using a transition support and an auxiliary middle supporting leg to fall for 1.4m integrally, and is ready to pass through a tunnel;
s1, the girder transporting vehicle carries the bridge girder erection machine to pass through the tunnel, the bridge girder erection machine stops when the center of the front supporting leg coincides with the designed position of the bridge pier cushion stone, and the hoisting crown block puts the rear supporting leg on the ground;
S2,
1. the front supporting leg rotates downwards, and a guide pillar in the front supporting leg extends out and is supported on a bridge pier cushion.
2. The auxiliary middle supporting leg telescopic guide column is released from being connected with a beam transporting vehicle through a bolt, and the whole machine is vertically jacked for 0.1m by means of a transition support and a front supporting leg jacking mechanism to prepare for longitudinal movement;
S3,
1. the beam transporting vehicle is in situ fixed, and the whole machine is stopped after longitudinally moving for 10m by a beam carrying trolley and a front support leg idler wheel of the beam transporting vehicle;
2. starting the auxiliary middle supporting leg rotating oil cylinder to enable the auxiliary middle supporting leg to rotate and retract, and preparing the whole machine to move longitudinally;
S4,
1. the whole machine is stopped after longitudinally moving for 5m by the transition bracket and the front support leg walking mechanism;
2. starting an auxiliary middle supporting leg rotating oil cylinder to enable the auxiliary middle supporting leg to rotate until the auxiliary middle supporting leg is vertical, jacking a telescopic guide pillar to support the bridge crane, retracting and disengaging the guide pillar in the front supporting leg, and preparing the front supporting leg to hang and longitudinally move;
S5,
1. the front support leg is suspended and longitudinally moved for 40.7m and then stops and is supported on the top surface of the front bridge pier base stone;
2. the auxiliary middle supporting leg telescopic guide column is retracted and emptied, and a front hoisting crown block hoists an auxiliary middle supporting leg fixing joint and a distribution beam to be installed;
S6,
1. the auxiliary middle supporting leg contracts, is subjected to disengaging and turning, the front supporting leg and the rear carrying support are stressed, and the whole machine longitudinally moves for 10m again and then stops;
2. a hoisting crown block hoists the bottom cross beam of the rear support leg and places the bottom cross beam at the appointed installation position at the exit of the tunnel;
S7,
1. the beam transporting vehicle moves forwards for 7.5m and then stops;
2. the jacking oil cylinder of the beam transporting vehicle extends out of the supporting ground;
S8,
1. the whole machine stops after longitudinally moving for 15.26m by the beam-carrying trolley and the front support leg walking mechanism 401;
S9,
1. jacking the whole carrying support and the front support leg in place, and installing the rear support leg;
2. and (4) carrying the beam in the beam returning field of the beam transporting vehicle to prepare for beam erecting.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the 40-meter 1000t OU-shaped supporting leg tunnel portal zero-distance beam erecting and bridge erecting machine provided by the invention can utilize a hydraulic oil cylinder to automatically and simply fold and then pass through a tunnel, belongs to a one-span and one-half type single-girder inter-support beam machine type, and has the characteristics of small quantity of structural components, simple structure, light weight, convenience in transportation, installation and disassembly, simple operation flow, simplification of the quantity of operators, high automation program and high safety performance;
2. the 40-meter 1000t OU-shaped supporting leg tunnel portal zero-distance girder erection and bridge erecting machine provided by the invention has the advantages that the front supporting leg and the rear supporting leg of the bridge erecting machine simply support and support a main girder, and the working conditions of erection and via holes are clearly stressed;
3. according to the 1000t single-girder bridge girder erection machine provided by the invention, the bridge girder erection machine is a self-balancing via hole, no other auxiliary machine is needed, and the via hole mode is simple and convenient. When the bridge girder is erected at the end hole tunnel portal of the bridge girder erection machine, the front cantilever of the bridge girder erection machine can directly enter the tunnel portal, and erection of the end hole zero-distance girder can be completed. When the girder is erected at the first hole tunnel opening of the bridge girder erection machine, the cantilever part which extends backwards can enter the tunnel opening after the OU type rear supporting leg of the bridge girder erection machine, so that the working condition that the bridge girder erection machine takes the girder from the girder transporting vehicle in the tunnel is realized, and the erection of the first hole zero-distance girder is completed.
Drawings
Fig. 1 is a schematic view of the overall structure of the present application.
Fig. 2 is an overall top schematic view of the present application.
FIG. 3 is a schematic view of the overall construction of the sprag planar frame of the front leg of the present application.
Fig. 4 is a cross-sectional structural schematic diagram of an upper abutment of a front leg of the present application.
Fig. 5 is a schematic view of the elongated front leg structure of the subject application.
Fig. 6 is a cross-sectional structural schematic view of a front leg of the present application.
FIG. 7 is a top view of the front leg running gear of the present application.
Fig. 8 is a schematic structural diagram of a hoisting overhead crane of the present application.
Fig. 9 is a partially enlarged schematic view of fig. 8.
FIG. 10 is a side schematic view of a hoisting crown block of the present application.
FIG. 11 is a schematic top view of the lift dome of the present application.
FIG. 12 is a side view of the rear leg of the present application.
FIG. 13 is a front view of the rear leg of the present application.
FIG. 14 is a top view of the rear leg of the present application.
Fig. 15 is a schematic view of the operation of S0 and S1 of the through tunnel girder construction process of the present application.
Fig. 16 is a schematic representation of the operation of S2 of the through tunnel framing beam construction process of the present application.
Fig. 17 is a schematic diagram of the operation of S3 of the through-tunnel girder construction process of the present application.
Fig. 18 is a schematic representation of the operation of S4 of the through tunnel framing beam construction process of the present application.
Fig. 19 is a schematic diagram of the operation of S5 of the through tunnel girder construction process of the present application.
Fig. 20 is a schematic representation of the operation of S6 of the through tunnel framing beam construction process of the present application.
Fig. 21 is a schematic representation of the operation of S8 of the through tunnel framing beam construction process of the present application.
Fig. 22 is a schematic representation of the operation of S9 of the through tunnel framing beam construction process of the present application.
Description of reference numerals: 1. a main beam of the bridge erecting machine; 2. a rear leg; 201. a bottom cross beam jacking mechanism; 202. a rear leg running mechanism; 203. a rear leg bottom cross beam; 204. a second section of the rear leg; 205. a telescopic column hydraulic system; 206. a left hydraulic telescopic upright post and a right hydraulic telescopic upright post; 207. a rear leg arm section; 208. a rear support leg upper beam; 209. a rear leg transition track bridge; 2010. a rear support leg rotating mechanism; 3. an auxiliary middle leg; 4. a front leg; 401. a front leg running mechanism; 4011. a rear carrier roller wheel; 4012. a front idler wheel; 402. a hanging wheel mechanism; 4021. driving the pinch roller; 4022. a driven pinch roller; 403. a horizontal upper framework; 404. a sprag planar frame; 405. a front leg outer sleeve; 406. a front leg movable sleeve; 407. a front leg inner guide post; 408. a front leg bottom cross member; 409. a front leg cross member; 410. a flat bearing; 4011. a rear carrier roller wheel; 4012. a front idler wheel; 5. hoisting the overhead traveling crane; 501. a frame; 502. a sprocket box mechanism; 503. a slipping vehicle; 504. a forced guide wheel; 505. a traversing mechanism; 506. a fixed pulley block; 6. a front winch system; 7. a transition support; 8. an electrical system; 9. a generator set; 10. a rear hoisting system; 11. a hydraulic system.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses a 40-meter 1000t OU type supporting leg tunnel portal zero-distance girder erection and bridge erecting machine. Referring to fig. 1 and 2, the bridge girder erection machine comprises a bridge girder erection machine main beam 1, wherein the lower part of the bridge girder erection machine main beam 1 is sequentially provided with a front supporting leg 4, a hoisting crown block 5 movably connected to the upper half part of the bridge girder erection machine main beam 1, an auxiliary middle supporting leg 3, a rear supporting leg 2 and a transition support 7 from front to back, the front supporting leg 4 is in an inverted triangle structure form, the hoisting crown block 5 comprises a front hoisting crown block and a rear hoisting crown block which are arranged at the front and back of the top of the main beam, the front view of the hoisting crown block 5 is in an omega shape, the auxiliary middle supporting leg is arranged at the middle bottom of the bridge girder erection machine main beam 1 and is hinged to the bridge girder erection machine main beam 1, the rear supporting leg 2 is in an O shape from the vertical view and in a U shape from the plane view, the transition support 7 is a hydraulic telescopic support arranged at the rear end of the bridge girder erection machine main beam 1, the rear end of the bridge girder erection machine main beam 1 is provided with a power bracket, and a tail winch 10 and a generator 9 are arranged on the power bracket, the tail winch 10 is a driving device for providing lifting power for the front lifting crown block, and the generator 9 is used for providing energy for the whole machine; the front end of the main beam of the bridge erecting machine is provided with a front winch 6 for providing lifting power for a rear lifting crown block.
Referring to fig. 3 and 4, the front leg 4 is in an inverted triangle structure, and three planar frames, namely, a horizontal upper frame 403, a main telescopic upright column planar frame, and an inclined strut planar frame 404, are hinged by a shaft, so that the front leg can be prevented from overturning when the whole machine passes through a hole, the stability of the whole machine passing through the hole is improved, and a stable structure system is formed.
Referring to fig. 3, 5 and 7, the front support leg 4 includes a front support leg walking mechanism 401 and a hanging wheel mechanism 402 on the upper portion of a horizontal plane of a framework 403, the front support leg walking mechanism 401 is distributed on two sides of the horizontal plane of the framework 403 parallel to the front and back direction of the main beam 1 of the bridge girder erection machine, the front support leg 4 further includes a transmission mechanism, and the transmission mechanism includes a rear support roller wheel 4011, a front support roller wheel 4012, a driving pressure wheel 4021 and a driven pressure wheel 4022 which are perpendicular to two sides of the length direction of the main beam 1 of the bridge girder erection machine. The rear carrier roller 4011 is driven by a constant-torque motor driving speed reducer, and can ensure that each wheel can flexibly rotate, roll rather than slide, so that the driving system can stably run at low speed and high torque.
The front supporting leg walking mechanism 401 and the hanging wheel mechanism 402 respectively act on the upper track and the lower track of the main beam 1 of the bridge erecting machine, the hanging wheel mechanism 402 acts on the ear beam track of the main beam, and when the front supporting leg walking mechanism 401 contacts with the lower track of the main beam 1 of the bridge erecting machine, the hanging wheel mechanism 402 is required to be basically consistent with the track clearance in the whole operation range.
Referring to fig. 6 and 7, a hinge plane bearing 410 is arranged between the front leg cross beam 409 and the front leg bottom cross beam 408, so that the front leg 4 and the lower cushion beam 409 can slightly rotate, and the erection requirement of a small curve beam bridge (the curve radius R is less than or equal to 800m) is met.
The lower part of the main telescopic upright post plane frame is provided with a telescopic joint which can be used for erecting box girders with different slopes (the longitudinal slope is less than or equal to 3%) and different heights.
When going up to the abutment, the front leg outer sleeve 405 and the front leg inner guide post 407 can be retracted to the abutment height. The inclined strut plane framework 404 is a double-helix strut structure, which comprises a lower helix rod and an upper helix rod, and is divided into an upper helix adjustment and a lower helix adjustment, the middle is a knife-slot-shaped double-pin shaft connection, when the bridge abutment is installed, the lower helix rod is turned up, and the upper helix rod is connected with the front supporting leg outer sleeve 405 through a pin shaft. When the standard span is erected, the upper and lower screws are integrated and are connected with the front supporting leg bottom cross beam 408 through a pin shaft. When the girder is transported, the main telescopic upright post plane framework retracts, the inclined strut plane framework 404 can be folded outwards, and the height of the whole front supporting leg 4 is reduced, so that the requirement of rapid transition between bridges is met.
A pin-shaft type force transducer is arranged between the horizontal plane upper framework 403 and the inclined strut plane framework 404, the stability of the supporting leg is monitored from the aspect of control, misoperation is prevented, and a safety protection device is added.
Referring to fig. 8, 9 and 11, two hoisting crown blocks 5 are provided in the front-rear direction of the main girder 1 of the bridge girder erection machine, and each hoisting crown block 5 includes a frame 501, a crown block 506, a skid block 503, a sprocket box mechanism 502, a forced guide wheel 504 and a traverse mechanism 505.
The front view of the frame 501 is in an omega structure, so that the arc space at the top of the tunnel can be effectively utilized.
The front part and the tail end of the main beam 1 of the bridge girder erection machine are respectively provided with a front hoisting system 6 and a rear hoisting system 10, the front hoisting system 6 and the rear hoisting system 10 are respectively and correspondingly connected with two hoisting overhead cranes 5 through guide pulley rope winding systems, and the hoisting systems are formed by penetrating and winding a fixed pulley block 506 on the hoisting overhead cranes 5 and a movable pulley block on a lifting appliance. The front hoisting crown block 5 is communicated with the rear hoisting system 10 through a steel wire rope, so that two hoisting points of the hoisting tool are balanced to form one hoisting point, thereby realizing four-point hoisting and three-point balancing, and effectively ensuring the balance and stability of the beam body.
Referring to fig. 10, the hoisting overhead traveling crane 5 has three-dimensional motion and micro motion functions, and can ensure accurate alignment installation of the box girder. The longitudinal movement of the hoisting crown block 5 is driven by a chain wheel box chain 502, the hoisting crown block runs back and forth on the top of a main beam 1 of the bridge girder erection machine, and a flat and long chain wheel box mechanism 502 is designed on the premise of meeting the wrapping angle of the circle center of a chain wheel, so that the height of a frame 501 is reduced, and the hoisting crown block 5 can enter a tunnel to take a beam; the fixed pulley block 506 can move transversely synchronously left and right along the cross beam of the frame 501 through the expansion of the oil cylinder, and the transverse displacement is +/-200 mm, so that the requirements of transverse fine adjustment of a beam body and curved frame beams are met.
The sliding trolley 503 adopts a large-tonnage roller trolley, the height of the trolley frame 501 is greatly reduced before underground and meeting the requirements of bearing capacity, flexibility and smoothness of operation, and the trolley can enter a tunnel to take a beam.
A heavy forced guide wheel 504 is arranged between the frame 501 which is slightly sunk and vertically arranged at two sides of the main beam 1 of the bridge girder erection machine and the main beam 1, a rolling bearing with enough bearing capacity is arranged in the forced guide wheel 504, and the phenomena of deviation and clamping stagnation in the running process of the hoisting crown block 5 are effectively solved.
The front winding system 6 and the rear winding system 10 are both provided with two sets of braking devices of a first stage and a last stage, the first stage adopts a brake with a variable frequency motor, and the last stage adopts a hydraulic caliper disc brake to brake the reel edge. Due to the separated design of the front hoisting system 6 and the rear hoisting system 10 and the trolley 5, the rope outlet angle is controlled within 1.5 degrees, and the rule of rope arrangement and the safety of hoisting can be ensured.
The front hoisting crown block 5 and the girder carrying trolley of the girder transporting vehicle act together to realize dragging and feeding the girder; the front and rear hoisting crown blocks 5 act together to realize the longitudinal movement, the micro-motion transverse movement adjustment and the beam falling in place of the concrete beam.
Referring to fig. 12, 13, and 14, the skeleton structure of the rear leg 2 is an inverted "L" -shaped "OU" structure, an inverted "L" shape in side view, an "O" shape in vertical view, and a "U" shape in plan view. The "OU" type rear leg 2 comprises a rear leg upper cross beam 208, a rear leg turning arm section 207, a left hydraulic telescopic upright column and a right hydraulic telescopic upright column 206, a telescopic upright column hydraulic system 205, a rear leg bottom cross beam 203, a rear leg walking mechanism 202, a bottom cross beam jacking mechanism 201, a rear leg rotating mechanism 2010, a transition rail bridge 209 and a rear leg second section 204, and a set of complete bearing structure system is formed.
The left hydraulic telescopic upright post 206, the right hydraulic telescopic upright post 206, the telescopic upright post hydraulic system 205 and the rear support leg bottom cross beam 203 are connected through flange plate high-strength bolts to form an O-shaped structural space, so that the front hoisting overhead traveling crane 5 and the beam transporting vehicle are matched to pull a feeding beam and a concrete box beam to pass through the section of the rear support leg; and the L-shaped upper rear supporting leg turning arm section 207 extending towards the rear wingspan is connected with webs on two sides of the main beam 1 of the bridge erecting machine through high-strength bolts of flange plates, so that the post-hoisting overhead traveling crane 5 can take the beam.
The lower cross beam 203 is used for mounting the rear leg walking mechanism 202 and the bottom cross beam jacking mechanism 209 of the bridge crane. When the beam is erected, the bottom beam jacking mechanism 209 extends out and is supported on the bridge floor, and the rear leg walking mechanism 202 and the bridge floor are supported by using steel pad piers. The top of the bottom beam 203 of the rear support leg is provided with a walking track of a girder-carrying trolley, the front part of the bottom beam is provided with a rear support leg rotating mechanism 2010, the tail part of the bottom beam is provided with a track beam and a rear support leg transition track bridge 209, the three complete butt joint with a girder-carrying vehicle and hoisting a crown block 5 and dragging and feeding the girder-carrying trolley under the condition of limited running distance of a tunnel portal, namely, in actual construction, the terrain space of the tunnel portal is relatively narrow, the limited space size interferes with the feeding of the girder, and the three are mutually matched to normally complete the feeding of the girder under the condition of smaller terrain space.
The rear supporting leg bottom cross beam 203 realizes that the bridge girder erection machine drags and draws a girder, after the girder transportation vehicle is in butt joint with the bridge girder erection machine, the hoisting crown block 5 can move a box girder from the girder transportation vehicle to the track on the upper part of the rear supporting leg bottom cross beam 203, the front hoisting crown block 5 is hoisted, and is matched with the rear girder carrying trolley to carry the girder forwards to the rear girder carrying trolley to travel to the track of the lower cross beam, at the moment, the rear supporting leg rotating mechanism 2010 rotates inwards to be communicated with the upper track and penetrates through a pin shaft, the front girder carrying trolley needs to move to the rear supporting leg rotating mechanism 2010, and the hoisting girder of the rear hoisting crown block 5 is matched with the front trolley to carry the girder to move forwards to a designated position. Meanwhile, the rear beam-carrying trolley pulls the front beam-carrying trolley to run onto the beam-carrying vehicle, and the oil cylinder of the rear support leg rotating mechanism 2010 works to rotate outwards to give way to the beam-falling position. The rear hoisting crown block 5 hoisting beam and the front hoisting crown block 5 fall beam in a matching way. When the bridge girder erection machine runs, the rear supporting leg running mechanism 202 runs on the special single rail
The left and right hydraulic telescopic columns 206 comprise an upper guide sleeve, a lower guide column and a hydraulic cylinder with a mechanical hoop. The telescopic micro-adjustment of the height of the rear pivot of the whole bridge girder erection machine can be realized, and the lifting overhead crane under the most difficult working condition can enter the straight tangent plane tunnel to take the girder from the girder-carrying trolley.
In order to realize self-folding and pass through the tunnel, except the OU-shaped rear supporting leg 2 which can enter the opening of the tunnel and backwards extending the cantilever part, the other rear supporting legs 2 are provided with rotating hinges at proper positions of all parts, the folding of all parts can be conveniently realized through a hydraulic oil cylinder, and the width of the rear supporting leg 2 is reduced, so that the bridge crane can pass through the tunnel.
On the other hand, the construction process is a through-tunnel girder erection construction process of a bridge girder erection machine.
Referring to fig. 15, S0, the girder transporting vehicle carries the bridge girder erection machine for preparation before passing through the tunnel;
the method comprises the following steps that 1, preparation work before a girder transporting vehicle carries a bridge girder erection machine to pass through a tunnel is carried out, a transition support extends out to be fixedly connected with a girder carrying trolley on the girder transporting vehicle, the girder transporting vehicle moves forwards, the upper girder carrying trolley moves backwards synchronously, auxiliary middle support legs are supported to the upper part of the girder transporting vehicle in a turning mode and fixedly connected through bolts;
2. the front hoisting crown block moves to the position above the beam transporting vehicle through the rear supporting leg, and the front supporting leg is folded to pass through the tunnel;
3. the bridge girder erection machine is converted into a low-position tunnel passing state by using a transition support and an auxiliary middle supporting leg to fall for 1.4m integrally, and is ready to pass through a tunnel;
s1, the girder transporting vehicle carries the bridge girder erection machine to pass through the tunnel, the bridge girder erection machine stops when the center of the front supporting leg coincides with the designed position of the bridge pier cushion stone, and the hoisting crown block puts the rear supporting leg on the ground;
referring to fig. 16, the operation of S2,
1. the front supporting leg rotates downwards, and a guide pillar in the front supporting leg extends out and is supported on a bridge pier cushion.
2. The auxiliary middle supporting leg telescopic guide column is released from being connected with a beam transporting vehicle through a bolt, and the whole machine is vertically jacked for 0.1m by means of a transition support and a front supporting leg jacking mechanism to prepare for longitudinal movement;
referring to fig. 17, the operation of S3,
1. the beam transporting vehicle is in situ fixed, and the whole machine is stopped after longitudinally moving for 10m by a beam carrying trolley and a front support leg idler wheel of the beam transporting vehicle;
2. starting the auxiliary middle supporting leg rotating oil cylinder to enable the auxiliary middle supporting leg to rotate and retract, and preparing the whole machine to move longitudinally;
referring to fig. 18, the operation of S4,
1. the whole machine is stopped after longitudinally moving for 5m by the transition bracket and the front support leg walking mechanism;
2. starting an auxiliary middle supporting leg rotating oil cylinder to enable the auxiliary middle supporting leg to rotate until the auxiliary middle supporting leg is vertical, jacking a telescopic guide pillar to support the bridge crane, retracting and disengaging the guide pillar in the front supporting leg, and preparing the front supporting leg to hang and longitudinally move;
referring to fig. 19, the operation of S5,
1. the front support leg is suspended and longitudinally moved for 40.7m and then stops and is supported on the top surface of the front bridge pier base stone;
2. the auxiliary middle supporting leg telescopic guide column is retracted and emptied, and a front hoisting crown block hoists an auxiliary middle supporting leg fixing joint and a distribution beam to be installed;
referring to fig. 20, the operation of S6,
1. the auxiliary middle supporting leg contracts, is subjected to disengaging and turning, the front supporting leg and the rear carrying support are stressed, and the whole machine longitudinally moves for 10m again and then stops;
2. a hoisting crown block hoists the bottom cross beam of the rear support leg and places the bottom cross beam at the appointed installation position at the exit of the tunnel;
S7,
1. the beam transporting vehicle moves forwards for 7.5m and then stops;
2. the jacking oil cylinder of the beam transporting vehicle extends out of the supporting ground;
referring to fig. 21, the operation of S8,
1. the whole machine stops after longitudinally moving for 15.26m by the beam-carrying trolley and the front support leg walking mechanism 401;
referring to fig. 22, the operation of S9,
1. jacking the whole carrying support and the front support leg in place, and installing the rear support leg;
2. and (4) carrying the beam in the beam returning field of the beam transporting vehicle to prepare for beam erecting.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (6)
1. The utility model provides a 40 meters 1000t "OU" type landing leg tunnel portal zero distance frame roof beam bridging machine which characterized in that: comprises a main beam (1) of the bridge erecting machine, wherein the lower part of the main beam (1) of the bridge erecting machine is sequentially provided with a front supporting leg (4), a hoisting overhead crane (5) movably connected with the upper half part of the main beam, an auxiliary middle supporting leg (3), a rear supporting leg (2) and a transition support (7) from front to back, the front supporting leg (4) is in an inverted triangle structure form, the hoisting overhead crane (5) comprises a front hoisting overhead crane (51) and a rear hoisting overhead crane (52) which are arranged at the front and the rear of the top of the main beam, the front view of the hoisting overhead crane (5) is in an omega shape, the auxiliary middle supporting leg (3) is arranged at the middle bottom of the main beam of the bridge erecting machine and is hinged with the main beam, the rear supporting leg (2) is in an O shape from the vertical face and in a U shape from the plane, the transition support (7) is a hydraulic telescopic support arranged at the rear end of the main beam (1) of the bridge erecting machine, and the rear end of the main beam (1) of the bridge erecting machine is provided with a power bracket, a tail winch (10) and a generator (9) are arranged on the power bracket, the tail winch (10) is a driving device for providing lifting power for a front lifting crown block, and the generator (9) is used for providing energy for the whole machine; the front end of the main beam (1) of the bridge erecting machine is provided with a front winch (6) which provides lifting power for a rear lifting crown block.
2. The 40m 1000t OU type supporting leg tunnel portal zero-distance girder erection and bridge erecting machine of claim 1, which is characterized in that: the front supporting leg (4) is in an inverted triangle structure form and comprises a horizontal plane upper framework (403), a main telescopic upright post plane framework and an inclined strut plane framework (404) which are connected through a shaft hinge, wherein the horizontal plane upper framework (403), the main telescopic upright post plane framework and the inclined strut plane framework (404) form a stable triangle structure system; preceding landing leg (4) top is provided with bearing roller train and anti-train of grabbing, preceding landing leg (4) are through bearing roller train and anti-train of grabbing and bridge girder erection machine girder (1) swing joint.
3. The 40m 1000t OU type supporting leg tunnel portal zero-distance girder erection and bridge erecting machine of claim 2, wherein: preceding landing leg (4) walk running gear (401) and hang wheel mechanism (402) including the preceding landing leg that lies in framework (403) upper portion on the horizontal plane, preceding landing leg is walked running gear (401) and is distributed on the horizontal plane and is on a parallel with bridging machine girder (1) fore-and-aft direction both sides of framework (403), preceding landing leg (4) still include drive mechanism, drive mechanism includes back bearing roller wheel (4011), preceding bearing roller wheel (4012), drive pinch roller (4021), driven pinch roller (4022) that are on a parallel with bridging machine girder (1) length direction both sides.
4. The 40m 1000t OU type supporting leg tunnel portal zero-distance girder erection and bridge erecting machine of claim 1, which is characterized in that: the structural form of the rear supporting leg (2) is an inverted L-shaped structure from the side, an O-shaped structure from the vertical surface, a U-shaped structure from the top view, and an inverted L-shaped OU-shaped rear supporting leg structure; the rear support leg (2) comprises a rear support leg upper cross beam (208), a rear support leg turning arm section (207), a left hydraulic telescopic upright column, a right hydraulic telescopic upright column (206), a telescopic upright column hydraulic system (205), a rear support leg bottom cross beam (203), a rear support leg walking mechanism (202), a bottom cross beam jacking mechanism (201), a rear support leg rotating mechanism (2010) and a rear support leg transition track bridge (209); a rear leg walking mechanism (202) and a rear leg transition track bridge (209) are arranged on the rear leg bottom cross beam (203); during girder erection, the bottom beam jacking mechanism (201) stretches out and supports on the bridge floor, the rear supporting leg walking mechanism (202) and the bridge floor use steel pad piers to support, the top of the rear supporting leg bottom beam (203) is provided with a walking track of a girder-carrying trolley, the front part of the rear supporting leg bottom beam (203) is provided with a rear supporting leg rotating mechanism (2010), the tail part of the rear supporting leg bottom beam (203) is provided with a track longitudinal beam and a rear supporting leg transition track bridge (209), the rear supporting leg rotating mechanism (2010), the rear supporting leg transition track bridge (209) and the track longitudinal beam three enable the hoisting overhead crane (5) to complete the dragging and girder-feeding actions to the girder-carrying trolley.
5. The 40m 1000t OU type supporting leg tunnel portal zero-distance girder erection and bridge erecting machine of claim 1, which is characterized in that: the hoisting overhead crane (5) comprises a frame (501), a fixed pulley block (506), a sliding vehicle (503), a chain wheel box mechanism (502), a forced guide wheel (504) and a transverse moving mechanism (505); the longitudinal movement of the lifting overhead traveling crane (5) is that a chain wheel box mechanism (502) drives a sliding vehicle (503) to move back and forth on the top of a main beam (1) of the bridge erecting machine, and a fixed pulley block (506) moves transversely synchronously left and right along a cross beam of the frame (501) through the expansion and contraction of an oil cylinder.
6. A construction process is characterized in that: s0, carrying the bridge girder erection machine by the girder transport vehicle to prepare before passing through the tunnel;
the preparation work before the girder transporting vehicle carries the bridge girder erection machine to pass through the tunnel comprises 1, extending out a transition support (7) to be fixedly connected with a girder carrying trolley on the girder transporting vehicle, enabling the girder transporting vehicle to move forwards, enabling the upper girder carrying trolley to move backwards synchronously, and assisting a middle supporting leg (3) to be folded and supported to the upper part of the girder transporting vehicle and fixedly connected by a bolt;
2. the front hoisting crown block moves to the position above the beam transporting vehicle through the rear supporting leg, and the front supporting leg (4) is turned to a state of passing through the tunnel;
3. the bridge girder erection machine is converted into a low-position tunnel passing state by using a transition support (7) and an auxiliary middle support leg (3) to fall for 1.4m integrally to prepare for passing through a tunnel;
s1, the girder transporting vehicle carries the bridge girder erection machine to pass through the tunnel, the bridge girder erection machine stops when the center of the front supporting leg (4) coincides with the designed position of the bridge pier base stone, and the hoisting crown block (5) puts the rear supporting leg (2) on the ground;
S2,
1. the front support leg (4) rotates downwards, and a guide post (407) in the front support leg extends out to be supported on a bridge pier base stone.
2. The telescopic guide columns of the auxiliary middle supporting legs (3) are disconnected from the beam transporting vehicle through bolts, and the whole machine is vertically jacked for 0.1m by means of the transition support (7) and the front supporting legs (4) to prepare for longitudinal movement;
S3,
1. the beam transporting vehicle is in situ fixed, and the whole machine is stopped after longitudinally moving for 10m by the beam carrying trolley of the beam transporting vehicle and the front supporting legs (4);
2. starting the auxiliary middle supporting leg (3) to rotate the oil cylinder, so that the auxiliary middle supporting leg (3) is rotated and retracted, and the whole machine is ready for longitudinal movement;
S4,
1. the whole machine is moved longitudinally for 5m by the transition bracket (7) and the front support leg walking mechanism (401) and then is stopped;
2. starting an auxiliary middle supporting leg (3) to rotate an oil cylinder, enabling the auxiliary middle supporting leg (3) to rotate until the auxiliary middle supporting leg is vertical, jacking a telescopic guide pillar to support the bridge crane, withdrawing and emptying a front supporting leg inner guide pillar (407), and preparing a front supporting leg (4) to hang and longitudinally move;
S5,
1. the front support leg (4) stops after being hung and longitudinally moved for 40.7m and supports the top surface of the front bridge pier base stone;
2. the telescopic guide post of the auxiliary middle supporting leg (3) is retracted and emptied, and the front lifting overhead crane (5) lifts the fixing joint of the auxiliary middle supporting leg (3) and the distribution beam to be installed;
S6,
1. the auxiliary middle supporting leg (3) contracts, is subjected to disengaging and turning, the front supporting leg (4) and the rear carrying support are stressed, and the whole machine longitudinally moves for 10m again and then stops;
2. the hoisting crown block (5) hoists the rear supporting leg bottom cross beam (203) and places the rear supporting leg bottom cross beam at the appointed installation position at the tunnel outlet;
S7,
1. the beam transporting vehicle moves forwards for 7.5m and then stops;
2. the jacking oil cylinder of the beam transporting vehicle extends out of the supporting ground;
S8,
1. the whole machine stops after longitudinally moving 15.26m by depending on a beam-carrying trolley and a front supporting leg (4) walking mechanism 401;
S9,
1. the pack carrying support and the front support leg (4) lift the whole machine to the proper position, and the rear support leg is installed;
2. and (4) carrying the beam in the beam returning field of the beam transporting vehicle to prepare for beam erecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111126810.8A CN113802460A (en) | 2021-09-26 | 2021-09-26 | 40-meter 1000t OU-shaped supporting leg tunnel portal zero-distance beam erecting and bridge erecting machine and construction process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111126810.8A CN113802460A (en) | 2021-09-26 | 2021-09-26 | 40-meter 1000t OU-shaped supporting leg tunnel portal zero-distance beam erecting and bridge erecting machine and construction process |
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| CN113802460A true CN113802460A (en) | 2021-12-17 |
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Cited By (1)
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| CN114837084A (en) * | 2022-04-11 | 2022-08-02 | 中铁第五勘察设计院集团有限公司 | Beam transporting vehicle and bridging system |
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