CN109695204B - Bridge girder erection machine and bridge girder erection method - Google Patents
Bridge girder erection machine and bridge girder erection method Download PDFInfo
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- CN109695204B CN109695204B CN201810740837.8A CN201810740837A CN109695204B CN 109695204 B CN109695204 B CN 109695204B CN 201810740837 A CN201810740837 A CN 201810740837A CN 109695204 B CN109695204 B CN 109695204B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 64
- 230000007306 turnover Effects 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 238000005096 rolling process Methods 0.000 claims abstract description 7
- 230000032258 transport Effects 0.000 claims description 4
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- 238000010276 construction Methods 0.000 description 10
- 210000001364 upper extremity Anatomy 0.000 description 9
- 230000009471 action Effects 0.000 description 2
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- 230000001276 controlling effect Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 238000012840 feeding operation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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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
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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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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Abstract
The invention discloses a bridge girder erection machine and a girder erection method. Belongs to the technical field of bridge erection. It mainly provides a novel bridge girder erection machine without a lower guide girder and a girder erection method thereof. The main characteristics of the device are as follows: the lifting device comprises a main beam, a front supporting leg, an auxiliary supporting leg, a rear supporting leg, a front lifting trolley, a rear lifting trolley, a lifting mechanism, a hydraulic system and an electric system; the lower part of the main beam is longitudinally provided with a track, the upper end of the front supporting leg is provided with a travelling gear train, and the travelling gear train and the track form longitudinal rolling fit; the upper end of the auxiliary supporting leg is hinged with the middle part of the main beam, and a turnover mechanism is arranged between the auxiliary supporting leg and the main beam; the rear supporting leg is of a closed leg structure, and the upper part of the rear supporting leg is fixedly connected with the main beam; the lifting mechanism, the front crane crown block and the rear crane crown block form a girder lifting system through a steel wire rope. The bridge girder erection machine has the characteristics of no need of arranging a lower guide girder, integration of span changing and via operation of the bridge girder erection machine into the same flow, and stronger applicability, and is mainly used for passing through a tunnel and being matched with a low-level girder transporting vehicle for use, and a bridge girder erection method.
Description
Technical Field
The invention belongs to the technical field of bridge erection, and particularly relates to a novel bridge girder erection machine and a bridge erection method.
Background
At present, the existing bridge girder erection machine consists of a main machine and a lower guide beam, the girder erection operation can be completed by means of huge lower guide beam support, and because the lower guide beam is long in length and heavy in weight, an auxiliary crown block is required to be arranged at the front end of a girder of the bridge girder erection machine, and the auxiliary crown block and an auxiliary supporting leg are used for lifting the lower guide beam to complete a via hole. The whole bridge girder erection machine in the prior art is high in height, particularly the height of the supporting position of the rear supporting leg, and for feeding the girder of the low-position girder transporting vehicle passing through the tunnel, an auxiliary device is required to be arranged to complete girder feeding operation.
Disclosure of Invention
The invention aims to solve the technical problem of providing a novel bridge girder erection machine without a lower guide girder and a bridge erection method thereof. The bridge girder erection machine can finish the operation of passing holes and erecting girders without arranging lower guide girders. The auxiliary supporting legs are arranged to change the via way of the bridge girder erection machine, so that the bridge girder erection machine is changed to be integrated with the via operation into the same flow, the span change is completed when the bridge girder erection machine passes through the via hole, and the operation efficiency of the bridge girder erection machine is greatly improved.
The bridge girder erection machine has the technical scheme that: the utility model provides a bridge girder erection machine, includes the girder, from front to back in proper order with the preceding landing leg, auxiliary landing leg and the back landing leg that the girder combined together to and install preceding trolley, back trolley, hoisting mechanism, hydraulic system and the electrical system on the girder, preceding trolley, back trolley are installed on girder upper portion inboard track, its characterized in that: the lower part of the main beam is longitudinally provided with a track, the upper end of the front supporting leg is provided with a running gear train, and the running gear train and the track form longitudinal rolling fit; the upper end of the auxiliary supporting leg is hinged with the middle part of the main beam, and a turnover mechanism is arranged between the auxiliary supporting leg and the main beam; the rear supporting leg is of a closed leg structure, and the upper part of the rear supporting leg is fixedly connected with the main beam; and the lifting mechanism, the front lifting trolley and the rear lifting trolley form a girder lifting system through a steel wire rope.
The front landing leg in the technical scheme of the bridge girder erection machine also comprises a shoulder pole beam, a telescopic upright post, a jacking cylinder, a thrust joint bearing, a transverse pushing mechanism and a cushion beam; the two telescopic upright posts are connected into a frame through an upright post cross beam between the two telescopic upright posts; the travelling wheel system comprises a wheel train base, a front traction wheel seat and a rear traction wheel seat, wherein the wheel train base comprises a base cross beam and base longitudinal beams extending longitudinally along two ends of the base cross beam, the two rear traction wheel seats are respectively arranged at two ends of the base cross beam, the two front traction wheel seats are respectively arranged at the outer ends of the base longitudinal beams, and the bottom of the base cross beam is hinged with a shoulder pole beam fixed at the upper end of a telescopic upright post through a steel connecting pin; the front traction wheel seat is provided with a front traction wheel system, the rear traction wheel seat is provided with a rear traction wheel system, and the front traction wheel system, the rear traction wheel system and the track form longitudinal rolling fit; the jacking cylinder is arranged between the upright post cross beam and the base longitudinal beam; the lower upright post beam of the frame is connected with the bolster through three thrust joint bearings and a transverse pushing mechanism.
The auxiliary supporting leg comprises two telescopic upright posts, wherein each upright post consists of an upper upright post, a lower upright post and a supporting oil cylinder which are matched with each other, and the supporting oil cylinder is connected between the upper upright post and the lower upright post; the upper end of the upper upright post is hinged with the main beam through a pin shaft; the turnover mechanism comprises an upper turnover oil cylinder and a lower turnover oil cylinder, the upper turnover oil cylinder is connected between the upper end of the upper upright post and the main beam, and the lower turnover oil cylinder is connected between the lower end of the lower upright post and the adjusting support; the lower part of the adjusting support is provided with a telescopic oil cylinder.
The invention relates to a technical scheme of a bridge girder erection machine, which comprises a closed O-shaped leg structure, wherein the closed O-shaped leg structure comprises a saddle beam at the upper part, two rear leg upper cross beams, two rear leg curved beams and a rear leg lower cross beam, wherein the upper surfaces of the inner sides of the saddle beam are respectively connected with two ends of the saddle beam, the two rear leg curved beams are respectively connected with the outer side bottom surfaces of the two rear leg upper cross beams, and the rear leg lower cross beams are connected between the two rear leg curved beams; the bottoms of the two ends of the lower cross beam of the rear landing leg are respectively provided with a rear landing leg running mechanism, and the rear landing leg running mechanism is provided with a hydraulic balancing mechanism; a vertical overturning oil cylinder is arranged between the outer side surfaces of the upper cross beams of the two rear support legs and the left and right rear support leg curved beams 4 c; a transverse overturning oil cylinder is arranged between the outer sides of the upper cross beams and the main beams of the left and right rear supporting legs; the inner side surfaces of the upper cross beams of the two rear supporting legs are connected with the main beams through bolts.
The front crane trolley and the rear crane trolley are respectively arranged at the front and rear positions of the main girder in the technical scheme of the bridge girder erection machine; the lifting device comprises chain wheel longitudinal moving systems arranged on rails on two sides of a main beam, a low-level heavy moving device movably arranged at the bottom of a frame, a lifting wheel train fixedly arranged in the frame, and a lifting tool connected with the lifting wheel train through a steel wire rope; the front end of the girder is provided with a support frame, and the support frame, the front lifting trolley, the rear lifting trolley and the lifting mechanism form a three-point lifting and four-point balancing system through steel wire ropes.
The low-position heavy-duty moving device in the technical scheme of the bridge girder erection machine is connected with a frame through a vertical pin shaft; the upper part of the low-level heavy-duty moving device is provided with a sliding bearing.
The main beam in the technical scheme of the bridge girder erection machine is a variable cross section box beam and comprises two box beams which are longitudinally parallel, wherein two transverse connecting beams are connected between the two box beams; the adjusting support is L-shaped.
The technical scheme of the bridge erection method of the invention is as follows: the bridge erection method adopting the bridge girder erection machine is characterized by comprising the following steps of:
(1) Supporting the front supporting leg on the pier top of the front pier, and adjusting the verticality of the front supporting leg to ensure that the running wheel systems are all in sliding friction; jacking the rear supporting leg to support the heavy-duty oil cylinder; the auxiliary supporting leg is automatically turned over by 90 degrees and is fixed in the middle of the main beam; preparing a girder erection machine;
(2) The beam transporting vehicle transports beams in place; lifting the beam sheet, driving the beam carrying trolley into the bottom of the main beam, moving the beam sheet forward by the beam carrying trolley, taking the beam by the front lifting trolley, and synchronously dragging and feeding the beam with the beam carrying trolley;
(3) The beam transporting trolley moves beam sheets to the lower part of the rear crane trolley, and the rear crane trolley takes beams through the lower part of the lifting appliance;
(4) Returning the beam transporting vehicle to a beam field for beam loading; the lifting mechanism is controlled by the electrical system, so that the front lifting trolley and the rear lifting trolley synchronously move to the beam-erecting position, and the front lifting trolley and the rear lifting trolley are controlled to finish beam-dropping operation;
(5) The rear landing leg running mechanism falls on a track paved on the bridge deck, the auxiliary landing leg overturning mechanism is started to overturn downwards by 90 degrees, so that the auxiliary landing leg is overturned from the middle part of the main beam to be arranged above the bridge deck, and the auxiliary landing leg is spaced from the erected beam surface by adjustment;
(6) The rear supporting leg is driven by the travelling wheel set to enable the whole machine to move forwards; when the rear support leg moves to the rear of the front support leg for a certain distance, the auxiliary support leg supports the front support leg to be hollow;
(7) The front of the front landing leg is automatically perforated to the front pier through the travelling wheel system, and the auxiliary landing leg is contracted to support the front landing leg;
(8) And the bridge girder erection machine moves forward in place for the second time and turns over the auxiliary supporting legs, the through holes are formed, and the bridge girder erection machine is in a girder erecting state.
In the step (5), the lower overturning oil cylinder of the auxiliary supporting leg is started to enable the adjusting support to overturn, and then the upper overturning oil cylinder is started to enable the auxiliary supporting leg to overturn from the middle of the main beam to be arranged above the bridge deck, and a certain distance is reserved between the auxiliary supporting leg and the erected beam surface through the adjusting support oil cylinder and the adjusting support.
In the step (6), when the front leg is stressed, the front and rear tug systems of the oil cylinder and the main beam are regulated to be rolling friction and monitoring systems, so that the safety of the whole machine through holes is ensured.
Compared with the prior art, the invention has the following advantages: 1. the bridge girder erection machine can be operated through Kong Jialiang without arranging a lower guide beam, so that the whole machine structure is light and the operation is simple and convenient; 2. the auxiliary supporting legs are designed, so that the via hole mode of the traditional bridge girder erection machine is changed, the bridge girder erection machine is changed into the same flow with the via hole operation, the construction is convenient, and the construction efficiency is greatly improved; 3. the rear supporting leg is provided with 4 large-tonnage hydraulic cylinders to replace the traditional mechanical balancing mechanism, so that the limit of the rear supporting leg of the traditional bridge girder erection machine on the height of the girder feeding is greatly reduced, the requirement of girder feeding in a tunnel is met, and the applicability is stronger; 4. the running mechanism of the front and rear lifting trolleys is a low-position heavy-duty transfer device, the running mode and the traction mechanism are consistent with beam carrying trolley fittings of the beam carrying trolley, the synchronism is easy to control, the height space of the whole machine is effectively reduced, and the beam taking in the tunnel and under the limited space condition of the tunnel portal is ensured.
The invention relates to a bridge girder erection machine and a bridge girder erection method, which are mainly used for passing through tunnels and being matched with a low-level girder transporting vehicle.
Drawings
FIG. 1 is a front view of the bridge girder erection machine of the present invention.
Fig. 2 is a sectional view of the front leg of fig. 1.
Fig. 3 is a sectional view of the auxiliary leg of fig. 1 in position.
Fig. 4 is a sectional view of the rear leg of fig. 1 in position.
Fig. 5 is a cross-sectional view of the front overweight trolley of fig. 1.
Fig. 6 is a front view of the front leg.
Fig. 7 is a left side view of the front leg.
Fig. 8 is a front view of the auxiliary leg.
Fig. 9 is a left side view of the auxiliary leg.
Fig. 10 is a front view of the rear leg.
Fig. 11 is a left side view of the rear leg.
Fig. 12 is a front view of the front trolley.
Fig. 13 is a standard construction flow chart for preparing a girder of the present invention.
Fig. 14 is a standard construction flow chart of the invention for pulling a feed beam in synchronization with a beam truck.
Fig. 15 is a standard construction flow chart of front and rear trolley hanging beams of the present invention.
Fig. 16 is a standard construction flow chart for completing a drop beam according to the present invention.
Fig. 17 is a flow chart of a via construction for turning an auxiliary leg to a deck in accordance with the present invention.
Fig. 18 is a flow chart of a via construction with front leg void in accordance with the present invention.
Fig. 19 is a flow chart of the via construction from the front leg to the front pier support in the present invention.
Fig. 20 is a flow chart of via construction with the via completed and in a state to be bridged according to the present invention.
The marks in the figure: 1, a main beam; 2, front supporting legs; 2a, a rear tug system; 2b, a front tug system; 2c, steel pins; 2d, carrying pole beams; 2e, telescoping upright posts; 2f, a lower upright post beam; 2g, a bolster; 2h, a transverse moving mechanism; 3, auxiliary supporting legs; 3a, standing columns; 3b, a pin shaft; 3c, an upper overturning oil cylinder; 3d, supporting the oil cylinder; 3e, turning over the oil cylinder downwards; 3f, adjusting the support; rear supporting legs; 4a saddle beam; 4b, a rear supporting leg upper cross beam; 4c, a rear supporting leg curved beam; 4d, a rear supporting leg lower cross beam; 4e, a hydraulic balancing mechanism; 4f, a rear supporting leg running mechanism; 4g, running the track; 4h, vertically overturning the oil cylinder; 5, a front crane trolley; 5a, a low-level heavy-duty mobile device; 5b, a frame; 5c, a steel wire rope; 5d, lifting the wheel train; 5e, vertical pin shafts; 5f, sliding bearings; 5g, a sprocket longitudinal moving system; 5h, lifting the sling; 6, a rear crane trolley; 7, lifting mechanism; 8, a hydraulic system; and 9. An electrical system.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 5, the bridge girder erection machine of the present invention comprises a girder 1, a front leg 2, an auxiliary leg 3, a rear leg 4, and a front trolley 5, a rear trolley 6, a lifting mechanism 7, a hydraulic system 8, and an electric system 9, which are sequentially combined with the girder 1 from front to rear. The main beam 1 consists of two longitudinally parallel box beams, two transverse connecting beams are connected together between the two box beams, and the main beam 1 is a variable cross section box beam. The front support leg 2 is a movable support leg and forms longitudinal rolling fit with a track below the main beam 1 through a travelling gear train. The auxiliary supporting legs 3 are temporary supporting legs and are hinged with the main beam 1, and large-angle overturning is achieved through an overturning mechanism. The rear supporting leg 4 is a fixed supporting leg which is also used as a walking power source, the upper part of the rear supporting leg is fixedly connected with the main beam 1, and a closed leg structure is formed at the rear end of the main beam 1. The front lifting trolley 5 and the rear lifting trolley 6 are arranged on the inner side rails at the upper parts of the left main beam and the right main beam, and the lifting mechanism 7 forms a complete girder lifting system with the front lifting trolley 5, the rear lifting trolley 6 and the end supports of the main beam 1 through steel wire ropes.
As shown in fig. 6 and 7, the front leg 2 has an inverted triangle structure, and further includes a shoulder pole beam 2d, a telescopic upright post 2e, a jacking cylinder, a thrust joint bearing, a transverse pushing mechanism 2h and a bolster 2g. The two telescopic uprights 2e are connected into a frame by means of a uprights cross-beam between them. The travelling wheel system comprises a front tug system 2b and a rear tug system 2a, the tug system comprises a wheel train base, a front tug seat and a rear tug seat, the wheel train base comprises a base cross beam and base longitudinal beams extending longitudinally along two ends of the base cross beam, the two rear tug seats are respectively arranged at two ends of the base cross beam, the two front tug seats are respectively arranged at the outer ends of the base longitudinal beams, and the bottom of the base cross beam is hinged with a shoulder pole beam 2d fixed at the upper end of a telescopic upright post 2e through a connecting steel pin 2 c. The front traction wheel seat is provided with a front traction wheel, the rear traction wheel seat is provided with a rear traction wheel, and the front traction wheel, the rear traction wheel and the track form longitudinal rolling fit. The front tug system 2b and the rear tug system 2a are existing products. The jacking cylinder is arranged between the column cross beam and the base longitudinal beam, the height of the telescopic column 2e is adjusted through the jacking cylinder, and when the telescopic column 2e is arranged on a bridge, the telescopic column 2e can be turned forwards for 90 degrees. The lower parts of the two telescopic upright posts 2e are connected with a lower upright post beam 2f through bolts, the lower upright post beam 2f is provided with three thrust joint bearings and a transverse pushing mechanism 2h, and the lower upright post beam and a cushion beam 2g can be allowed to slightly rotate during transverse movement, so that the erection requirement of a curved beam bridge is met.
As shown in fig. 8 and 9, the auxiliary supporting leg 3 is of an L-shaped structure and comprises two telescopic upright posts 3a, each upright post 3a is composed of an upper upright post, a lower upright post and a supporting oil cylinder 3d which are matched, the supporting oil cylinder 3d is connected between the upper upright post and the lower upright post, the upper end of the upper upright post is hinged with a main beam 1 mounting seat through a pin shaft 3b, and the mounting seat is connected with the main beam 1 through a high-strength bolt. The turnover mechanism comprises an upper turnover oil cylinder 3c and a lower turnover oil cylinder 3e, wherein the movable end of the upper turnover mechanism 3c is arranged at the upper end of an upper upright, the fixed end of the upper turnover mechanism is arranged on a fixed hinged support in the middle of the main beam 1, the fixed end of the lower turnover mechanism 3e is arranged at the lower end of a lower upright, and the movable end of the lower turnover mechanism is arranged on an adjusting support 3f at the bottom. The lower part of the lower upright post is fixed with the upper part of the adjusting support 3f through a lower shaft hinge and a connecting pin shaft, and a telescopic oil cylinder is arranged at the lower part of the adjusting support 3f and used for assisting fine adjustment and expansion of the supporting leg, and the telescopic oil cylinder is supported on the box-shaped beam during hole passing operation. The upright post 3a can realize two-stage height adjustment through the support oil cylinder 3d and the telescopic oil cylinder. The adjusting support 3f is an L-shaped crank arm. The upper turning cylinder 3c is used for turning over the whole auxiliary leg, and the lower turning cylinder 3e is used for turning over the adjusting support 3f.
The upper upright post and the lower upright post can be rectangular structures formed by welding steel plates, and sliding plates are arranged on the inner side of the upper upright post and the outer side of the lower upright post, so that the lower upright post can smoothly stretch along the upper upright post through the action of the supporting oil cylinder, and round holes for installing bolts are formed in the two sides of the upper upright post and the two sides of the lower upright post. The support cylinder is arranged on the inner sides of the upper upright post and the lower upright post, so that the structural size can be reduced, and the space can be saved. The upper upright post, the lower upright post and the adjusting support 3f form an L-shaped structure, so that the problem that the supporting point of the station of the auxiliary supporting leg is positioned above the web plate of the box girder can bear the pressure transferred by the auxiliary supporting leg, the box girder cannot be damaged, and the box girder is safer. The invention can be folded to the side of the girder automatically and is close to the girder, thereby facilitating the tunneling of the bridge girder erection machine.
As shown in fig. 10 and 11, the rear support leg is of a closed 'O' -shaped leg structure, and is a heavy load support leg and a walking power source of the whole machine. The rear support leg 4 comprises a saddle beam 4a at the upper part, two ends of the saddle beam 4a are respectively connected with the inner upper surfaces of a left rear support leg upper cross beam 4b and a right rear support leg upper cross beam 4b through bolts, the outer bottom surfaces of the left rear support leg upper cross beam 4b and the right rear support leg upper cross beam 4b are respectively connected with a left rear support leg curved beam 4c and a right rear support leg curved beam 4c through bolts, and the left rear support leg curved beam 4c and the right rear support leg curved beam 4c are connected with two ends of a rear support leg lower cross beam 4d through bolts. The inner side surfaces of the upper cross beam 4b of the left and right rear support legs are connected with the main beam 1 through bolts. The side face of the lower cross beam 4d of the rear supporting leg is connected with the trolley mounting seat through bolts, the traveling mechanism 4f of the rear supporting leg is connected with the trolley mounting seat through a hydraulic balancing mechanism 4e, the hydraulic balancing mechanism 4e adopts a supporting oil cylinder, the balance of the stress of all the traveling mechanisms 4f of the rear supporting leg can be ensured, and the limit of the rear supporting leg 4 of the bridge girder erection machine on the height of the feeding girder is greatly reduced. A vertical overturning oil cylinder 4h is arranged between the outer side surfaces of the left and right rear leg upper cross beams 4b and the left and right rear leg curved beams 4c, and a movable hinged support is arranged between the rear leg upper cross beams 4b and the rear leg curved beams 4c and used for hinging the rear leg curved beams 4c with the rear leg upper cross beams 4b when the rear leg curved beams 4c vertically overturn. When the vertical overturning oil cylinder 4h works, the movable hinged support is used as a shaft to drive the rear supporting leg curved beam 4c to finish upward folding action. A transverse overturning oil cylinder is arranged between the outer sides of the left and right rear support leg upper cross beams 4b and the main beam 1, and a movable hinged support is arranged between the rear support leg upper cross beams 4b and the main beam 1 and used for hinging the rear support leg upper cross beams 4b with the main beam 1 during transverse overturning. When the transverse overturning oil cylinder works, the movable hinged support is used as an axis to drive the folded rear supporting leg curved beam 4c and the rear supporting leg upper cross beam 4b to complete transverse 90-degree folding until the folding is close to the main beam 1. When tunneling, the saddle beam 4a and the lower cross beam 4d of the rear support leg are removed from the upper parts of the support legs, the upper cross beams 4b of the rear support legs on the two sides of the support legs are rotated by 90 degrees through a transverse turnover mechanism and are rotated from the plane of the support legs to the plane of the guide beam, the rear supporting leg curved beam 4c is turned up through the vertical turning mechanism, so that the width and the height of a vehicle supporting position in the bridge girder erection machine are reduced, and the requirements on the clearance of a tunnel are met. Under the condition that the low-level girder transporting vehicle and the carrying support are matched, the rear support leg can be folded and contracted through a self-mechanism of the bridge girder erection machine, can carry through a tunnel, and can be restored to a bridge girder erection state through the self-mechanism at a tunnel opening.
The front support leg 2 and the rear support leg 4 are heavy-load support legs, the front support leg 2 can complete self-passing holes by means of self equipment, and the rear support leg 4 can be matched with a rear tug system 2a and a front tug system 2b of the front support leg 2 on a track 4g to complete whole-machine passing holes.
As shown in fig. 12, the front trolley 5 and the rear trolley 6 have substantially identical structural forms and are respectively mounted at front and rear positions of the main beam 1, and each of the front and rear trolley and the rear trolley comprises a sprocket longitudinal moving system 5g mounted on the inner side rails of the left and right box beams, a low-level heavy moving device 5a movably mounted at the bottom of the frame 5b, a lifting gear train 5d fixedly mounted inside the frame 5b, and a lifting appliance 5h connected with the lifting gear train 5d through a steel wire rope 5 c. The rear end of the main beam 1 is provided with a support frame, and the front lifting trolley 5, the rear lifting trolley 6, the lifting mechanism 7 and the support frame at the rear end of the main beam 1 form a three-point lifting and four-point balancing system through a steel wire rope 5c to finish beam taking, beam moving and beam falling operations of beam sheets.
The low-level heavy moving device 5a is connected with the frame 5b through the vertical pin shaft 5e, and the sliding bearing 5f is arranged on the upper portion of the low-level heavy moving device 5a, so that slight rotation can be allowed to occur when the hoisting beam piece runs, and lateral contact force of the low-level heavy moving device 5a is effectively reduced.
The bridge erection method of the invention is carried out according to the following steps.
In the first step shown in fig. 13, the front supporting leg 2 of the bridge girder erection machine is supported on the pier top of the front pier, the verticality of the front supporting leg 2 is adjusted, the running gear trains of the front tug system 2b and the rear tug system 2a are in sliding friction, the auxiliary supporting leg 3 is automatically turned over by 90 degrees and fixed in the middle of the main girder 1, the space between the bottom of the lower beam 4d of the rear supporting leg and the girder surface is increased by adjusting the lifting of an oil cylinder in the hydraulic balancing mechanism 4e, a cushion block is placed at the bottom of the lower beam 4d of the rear supporting leg, then the oil cylinder in the hydraulic balancing mechanism 4e is contracted, the rear supporting leg running mechanism 4f of the rear supporting leg 4 is separated from the running track 4g, and the support of the rear supporting leg running mechanism 4f is converted into the cushion block support. The bridge girder erection machine prepares a girder erection.
And in the second step shown in fig. 14, the beam transporting trolley transports the beam in place, lifts the beam sheet and drives the beam carrying trolley into the bottom of the box beam, the beam carrying trolley moves the beam sheet forward, the front crane trolley 5 of the bridge girder erection machine moves forward to the rear end of the main girder, the lifting appliance 5h is arranged at the front end of the beam sheet, after the installation is completed, the beam transporting trolley and the control system of the bridge girder erection machine are connected into a whole, the moving speed is controlled, and the front crane trolley 5 and the beam transporting trolley synchronously drag and feed the beam.
And in the third step shown in fig. 15, the beam transporting trolley moves beam pieces below the rear crane trolley 6, and the rear crane trolley 6 takes beams below the lifting appliance 5h, so that the beam transporting trolley is separated from the control system of the bridge girder erection machine.
And in the fourth step shown in fig. 16, the beam transport vehicle returns to the beam field for beam loading. The hoist of the hoisting mechanism 7 is controlled by the electric system 9, so that the front trolley 5 and the rear trolley 6 synchronously move to the girder erecting position, and the girder dropping operation is completed by controlling the rope outlet quantity of the hoist and controlling the front and rear trolleys 5 and 6.
As shown in fig. 17, in the fifth step, the rear support leg 4 supports the cylinders by lowering the hydraulic balancing mechanism 4e, so that the running wheel set falls on the track 4g laid on the bridge deck, the lower turning cylinder 3e of the auxiliary support leg 3 is started, the adjusting support 3f is turned over, and the upper turning cylinder 3c is started, so that the auxiliary support leg 3 turns over the bridge deck from the middle of the main beam 1, and a certain distance is formed between the auxiliary support leg 3 and the erected beam surface by adjusting the supporting cylinder 3d and the adjusting support 3 f.
In the sixth step shown in fig. 18, the rear supporting leg 4 is driven by the running wheel set to move the whole machine forward. When the auxiliary leg 3 moves a certain distance behind the front leg 2, the auxiliary leg 3 is supported so as to be emptied.
In the seventh step shown in fig. 19, the front support leg 2 passes through the front and rear tug systems and self-passes through the hole to the front pier, and the auxiliary support leg 3 is contracted to support the front support leg 2.
And an eighth step shown in fig. 20, the bridge girder erection machine is advanced in place for the second time and the auxiliary supporting legs 3 are turned over, the through holes are formed, and the bridge girder erection machine is in a girder erecting state.
Claims (6)
1. The utility model provides a bridge girder erection machine, includes girder (1), front landing leg (2), auxiliary landing leg (3) and back landing leg (4) that combine together with girder (1) in proper order from front to back to and install preceding trolley (5), back trolley (6), hoisting mechanism (7), hydraulic system (8) and electrical system (9) on girder (1), preceding trolley (5), back trolley (6) are installed on girder (1) upper portion inboard track, its characterized in that: the lower part of the main beam (1) is longitudinally provided with a track, the upper end of the front supporting leg (2) is provided with a running gear train, and the running gear train and the track form longitudinal rolling fit; the upper end of the auxiliary supporting leg (3) is hinged with the middle part of the main beam (1), and a turnover mechanism is arranged between the auxiliary supporting leg (3) and the main beam (1); the auxiliary support leg (3) comprises two telescopic upright posts (3 a), each upright post (3 a) is composed of an upper upright post, a lower upright post and a support oil cylinder (3 d) which are matched, and the support oil cylinder (3 d) is connected between the upper upright post and the lower upright post; the upper end of the upper upright post is hinged with the main beam (1) through a pin shaft (3 b); the turnover mechanism comprises an upper turnover oil cylinder (3 c) and a lower turnover oil cylinder (3 e), the upper turnover oil cylinder (3 c) is connected between the upper end of the upper upright post and the main beam (1), and the lower turnover oil cylinder (3 e) is connected between the lower end of the lower upright post and the adjusting support (3 f); the lower part of the adjusting support (3 f) is provided with a telescopic oil cylinder; the rear support leg (4) is a heavy-load support leg and comprises a closed O-shaped leg structure which is formed by a saddle beam (4 a) at the upper part, two rear support leg upper cross beams (4 b) with the upper surfaces at the inner sides respectively connected with the two ends of the saddle beam (4 a), two rear support leg curved beams (4 c) respectively connected with the outer bottom surfaces of the two rear support leg upper cross beams (4 b) and a rear support leg lower cross beam (4 d) connected between the two rear support leg curved beams (4 c); the side surface of the lower cross beam (4 d) of the rear support leg is connected with the trolley mounting seat through a bolt, and the traveling mechanism (4 f) of the rear support leg is connected with the trolley mounting seat through a hydraulic balancing mechanism (4 e), so that the traveling mechanism (4 f) of the rear support leg is stressed uniformly, and the limit of the rear support leg (4) on the height of the feeding beam is reduced; the inner side surfaces of the two rear supporting leg upper cross beams (4 b) are connected with the main beam (1) through bolts; the front lifting trolley (5) and the rear lifting trolley (6) are respectively arranged at the front and rear positions of the main beam (1); the lifting device comprises chain wheel longitudinal moving systems (5 g) arranged on rails on two sides of a main beam (1), a low-level heavy moving device (5 a) movably arranged at the bottom of a frame (5 b), a lifting wheel system (5 d) fixedly arranged in the frame (5 b), and a lifting tool (5 h) connected with the lifting wheel system (5 d) through a steel wire rope (5 c); the front end of the main beam (1) is provided with a support frame, and the support frame, the front trolley (5), the rear trolley (6) and the lifting mechanism (7) form a three-point lifting and four-point balancing system through a steel wire rope (5 c); the lifting mechanism (7), the front lifting trolley (5) and the rear lifting trolley (6) form a girder lifting system through a steel wire rope (5 c); the low-level heavy-duty moving device (5 a) is connected with the frame (5 b) through a vertical pin shaft (5 e); the upper part of the low-level heavy-duty moving device (5 a) is provided with a sliding bearing (5 f).
2. A bridge girder erection machine according to claim 1, wherein: a vertical overturning oil cylinder (4 h) is arranged between the outer side surfaces of the two rear support leg upper cross beams (4 b) and the left and right rear support leg curved beams (4 c); a transverse overturning oil cylinder is arranged between the outer sides of the upper cross beams (4 b) of the left and right rear supporting legs and the main beam (1); the two ends of the saddle beam (4 a) are respectively connected with the inner upper surfaces of the left and right rear support leg upper cross beams (4 b) through bolts, the outer bottom surfaces of the left and right rear support leg upper cross beams (4 b) are respectively connected with the left and right rear support leg curved beams (4 c) through bolts, and the left and right rear support leg curved beams (4 c) are connected with the two ends of the rear support leg lower cross beam (4 d) through bolts.
3. A bridge girder erection machine according to claim 1, wherein: the hydraulic balancing mechanism (4 e) adopts a supporting oil cylinder.
4. A bridge girder erection machine according to any one of claims 1-3, wherein: the main beam (1) is a variable cross section box beam and comprises two box beams which are longitudinally parallel, and two transverse connecting beams are connected between the two box beams; the adjusting support (3 f) is L-shaped.
5. A bridge erection method using the bridge girder erection machine of claim 1, comprising the steps of:
(1) Supporting the front supporting leg (2) on the pier top of the front pier, and adjusting the verticality of the front supporting leg (2) to ensure that the running wheel systems are all in sliding friction; the auxiliary supporting leg (3) is automatically turned over for 90 degrees and is fixed in the middle of the main beam (1); preparing a girder erection machine;
(2) The beam transporting vehicle transports beams in place; lifting the beam sheet, driving the beam carrying trolley into the bottom of the main beam (1), moving the beam sheet forward by the beam carrying trolley, taking the beam by the front lifting trolley (5), and synchronously dragging and feeding the beam with the beam carrying trolley after the beam carrying trolley;
(3) The beam transporting trolley carries beam trolley back to move beam pieces below the back lifting trolley (6), and the back lifting trolley (6) takes beams below the lifting appliance (5 h);
(4) Returning the beam transporting vehicle to a beam field for beam loading; the lifting mechanism (7) is controlled through the electrical system (9), so that the front lifting trolley (5) and the rear lifting trolley (6) synchronously move to a girder erecting position, and the front lifting trolley and the rear lifting trolley (5, 6) are controlled to finish girder dropping operation;
(5) Firstly, a lower overturning oil cylinder (3 e) of the auxiliary supporting leg (3) is started, an adjusting support (3 f) is overturned, then an upper overturning oil cylinder (3 c) is started, the auxiliary supporting leg (3) is overturned above a bridge deck from the middle of the main beam (1), and a certain distance is reserved between the auxiliary supporting leg (3) and the erected beam surface through the adjusting support oil cylinder (3 d) and the adjusting support (3 f); the rear supporting leg running mechanism (4 f) falls on a track (4 g) paved on the bridge deck, the turning mechanism of the auxiliary supporting leg (3) is started to turn down by 90 degrees, the auxiliary supporting leg (3) is turned over the bridge deck from the middle part of the main beam (1), and the auxiliary supporting leg (3) is separated from the erected beam surface by adjustment;
(6) The rear supporting leg (4) is driven by the travelling wheel set to enable the whole machine to move forwards; when the rear support leg (4) moves to the rear of the front support leg (2) for a certain distance, the auxiliary support leg (3) supports the front support leg (2) to be emptied;
(7) The front support leg (2) is automatically perforated to the front pier through the travelling wheel system, and the auxiliary support leg (3) is contracted to support the front support leg (2);
(8) And the bridge girder erection machine moves forward in place for the second time and turns over the auxiliary supporting legs (3), the through holes are formed, and the bridge girder erection machine is in a girder erecting state.
6. A method of erecting a bridge according to claim 5, comprising the steps of:
The method comprises the steps of (1) supporting a front supporting leg (2) of a bridge girder erection machine on the pier top of a front pier, adjusting the verticality of the front supporting leg (2), enabling a running gear train of a front tug system (2 b) and a running gear train of a rear tug system (2 a) to be in sliding friction, enabling an auxiliary supporting leg (3) to automatically turn over 90 degrees and be fixed in the middle of a main girder (1), enabling the space between the bottom of a lower beam (4 d) of the rear supporting leg and the girder surface to be increased by adjusting the lifting of an oil cylinder in a hydraulic balancing mechanism (4 e), placing a cushion block at the bottom of the lower beam (4 d) of the rear supporting leg, and then shrinking the oil cylinder in the hydraulic balancing mechanism (4 e), enabling a rear supporting leg running mechanism (4 f) of the rear supporting leg (4) to be separated from a running track (4 g), enabling the support of the rear supporting leg running mechanism (4 f) to be converted into a cushion block support, and preparing the bridge girder erection machine;
(2) The beam transporting trolley is used for transporting beams in place, lifting beam sheets and driving a beam carrying trolley into the bottom of a box beam, the beam sheets are moved forward by the beam carrying trolley, the front lifting trolley (5) of the bridge girder erection machine is moved forward to the rear end of a main girder, a lifting appliance (5 h) is arranged at the front end of the beam sheets, after the beam transporting trolley and the control system of the bridge girder erection machine are connected into a whole, the moving speed is controlled, and the front lifting trolley (5) and the beam carrying trolley behind the beam transporting trolley synchronously drag and feed beams;
(3) The beam transporting trolley moves beam pieces to the lower part of the rear crane trolley (6), and the rear crane trolley (6) takes beams from the lower part of the lifting appliance (5 h) so as to separate the beam transporting trolley from a control system of the bridge girder erection machine;
(4) Returning the beam transporting vehicle to a beam field for beam loading; the hoist of the lifting mechanism (7) is controlled by the electric system (9), so that the front hoisting trolley (5) and the rear hoisting trolley (6) synchronously move to the girder erecting position, and the girder dropping operation is completed by controlling the rope outlet quantity of the hoist and controlling the front hoisting trolley and the rear hoisting trolley (5, 6);
(5) The rear supporting leg 4 enables the running wheel set to fall on a track (4 g) paved on a bridge deck by lowering an oil cylinder in the hydraulic balancing mechanism (4 e), a lower overturning oil cylinder (3 e) of the auxiliary supporting leg (3) is started firstly, an adjusting support (3 f) is overturned, an upper overturning oil cylinder (3 c) is started, the auxiliary supporting leg (3) is overturned above the bridge deck from the middle part of the main beam (1), and a certain distance is reserved between the auxiliary supporting leg (3) and the erected beam surface through the adjusting support oil cylinder (3 d) and the adjusting support (3 f);
(6) The rear supporting leg (4) is driven by the travelling wheel set to enable the whole machine to move forwards; when the auxiliary support leg (3) moves to the rear of the front support leg (2) for a certain distance, the auxiliary support leg (3) supports the front support leg (2) to be emptied;
(7) The front support leg (2) automatically passes through holes to the front pier through the front and rear tug systems, and the auxiliary support leg (3) is contracted to support the front support leg (2);
(8) And the bridge girder erection machine moves forward in place for the second time and turns over the auxiliary supporting legs (3), the through holes are formed, and the bridge girder erection machine is in a girder erecting state.
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| CN110205948B (en) * | 2019-07-12 | 2024-06-07 | 贵州路桥集团有限公司 | Wide bridge girder erection machine and erection method thereof |
| CN110714411A (en) * | 2019-10-17 | 2020-01-21 | 合肥正浩机械科技有限公司 | Matching structure of support leg and main beam of bridge girder erection machine |
| CN113756210B (en) * | 2021-10-19 | 2023-02-10 | 中交一公局集团有限公司 | Device and method for self-transporting and mounting top box girder across adjacent bent cap |
| CN114481835B (en) * | 2021-12-13 | 2023-04-07 | 中铁第五勘察设计院集团有限公司 | Stepless span changing device and method for suspension point of bridge girder erection machine |
| CN114164766A (en) * | 2021-12-24 | 2022-03-11 | 中交第一航务工程局有限公司 | Method for erecting front supporting leg of bridge erecting machine |
| CN114837084B (en) * | 2022-04-11 | 2023-09-05 | 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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