CN1311134C - Down beam type bridge-erecting machine and bridge erecting method thereof - Google Patents

Abstract

The present invention relates to a lower guide beam type bridge-erecting machine and a bridge-erecting method thereof, particularly to a frame transporting device adopted by railways, highways and urban bridges and a bridge-erecting method. The bridge-erecting machine is composed of a beam raising machine, a lower guide beam and a tire type beam transporting trolley, wherein the beam raising machine comprises a body structure and a hoisting mechanism; a longitudinally moving overhead crane comprises a traveling wheel box and an oil cylinder, and the trolley of a frame transporting beam machine comprises a wheel box assembly. The bridge-erecting machine is used for erecting the bridge; when the bridge is erected, extending wings of supporting legs in the bridge-erecting machine interact with rear supporting legs, and a hoisting type of fixed points is adopted. The present invention utilizes the lower guide beam as a beam transporting passage; middle supporting legs of the bridge-erecting machine extend wings; the rear supporting legs and the front supporting legs bear loads; the tire type beam transporting trolley makes a concrete box beam transferred into the abdominal cavity of the bridge-erecting machine; the middle supporting legs lie in the wing collecting state; after the front supporting legs and the middle supporting legs bear the loads, the rear supporting legs discharge the loads, and then, the concrete box beam is lifted, and the concrete box beam is directly placed on the pier top for installation. The present invention can safely and quickly complete the beam erection of the bridge head and the bridge tail, and the present invention is also suitable for being used on highways and the urban bridges.

Description

Down-guiding girder type bridge erecting machine and its beam erecting method

Technical field The present invention relates to transporting equipment and bridging methods used in railways, highways and urban bridges.

Background technology With the rapid development of my country's economy, more and more high-speed railways need to be built. At present, the types of transport equipment used in high-speed railway box girder transport equipment include integrated bridge erecting machine, simply supported truss bridge erecting machine, Down guide girder bridge erecting machine. Among them, the lower guide beam type bridge erecting machine has the characteristics of separated transport frame, fixed-point lifting, light structure, safety and reliability, but it cannot meet the erection of the first and last hole beams and U-turn. The invention is also applicable to highways and urban bridges.

SUMMARY OF THE INVENTION The purpose of the present invention is to address the above-mentioned status quo, aiming to provide a lower guide beam type bridge erecting machine and its erection machine with simple and reasonable structure, good stress state, advanced control, simple and easy operation, complete functions, safety and reliability. beam method.

The way to realize the purpose of the present invention is that the lower guide beam type bridge erecting machine is composed of a beam lifting machine, a lower guide beam, and a tire-type beam transporting trolley, and the beam lifting machine is composed of a main beam 2, a rear support leg 1, a middle support leg 3, a front support Leg 9, front hoisting trolley 8, rear hoisting trolley 7, lower guide beam vertically moving crane 6, beam transporting and lifting machine trolley 10, movable oil cylinder lifting point 14, electrical system, hydraulic system, safety device, main beam and The front outrigger 9, the middle outrigger 3, and the rear outrigger 1 are connected by bolts. The front lifting trolley 8, the rear lifting trolley 7, and the lifting point 14 of the movable oil cylinder form a lifting system, which is installed on the main beam track. The trolley 10 is composed of independent front and rear groups of single-track double-track trolleys,

The vertical traveling crane that can run along the main beam 2 is composed of traveling wheel box 21, distribution beam 22, longitudinal traveling crane beam 23, sliding seat 24, lateral moving cylinder 27, main lifting point cylinder 25, auxiliary lifting point cylinder 26, etc. composition. The traveling wheel box 21 is connected with the distribution beam 22 with a pin shaft, the longitudinal traveling crane beam 23 is connected with the distribution beam 22 with bolts, and the oil cylinder 25 of the main lifting point and the oil cylinder 26 of the auxiliary lifting point are fixed on the main beam with a pin shaft.

The lower guide beam is composed of the lower guide beam structure 4 and the longitudinal moving roller 11,

The structure of the lower guide beam 4 is divided into five sections 16, 17, 18, 19, and 20, and the sections are all connected by bolts. The lower guide beam is provided with two longitudinal idlers 11, and the longitudinal idlers 11 are suspended on the lower guide beam. The lower part of the beam.

The lower guide beam type bridging rack girder method is carried out according to the following steps:

1) Use the bridge erecting machine to install the lower guide beam at the bridge head, the steps are as follows:

① The beam transport trolley 5 transports the beam lifting machine and the lower guide beam 4 to the bridge head,

②The vertical crane 6 installs the lower section of the front outrigger 9, and the beam transport trolley 5 positions the beam lifting machine on the bridge abutment,

③ Remove the triangular bracket by moving the crane vertically, and the beam transporting trolley and the lifting mechanism of the beam lifting machine cooperate to place the lower guide beam 4 on the bridge head,

④The crown block lifts the rear end of the lower guide beam, and pushes the lower guide beam to the front pier synchronously with the longitudinal idler roller 11,

⑤Install the guiding tackle on the beam transport trolley. Thread around the jack rope, the idler and the lower guide beam are fixed, loosen the connection between the beam transport trolley and the lower guide beam, use the beam transport trolley to guide the lateral positioning plate, and move the crane longitudinally to slowly lower the lower guide beam to rest on the front pier.

⑥ Loosen the connection between the idler and the lower guide beam, and the idler drives the lower guide beam to slide slowly,

⑦ Lift the guide beam at the front lifting point of the beam lifting machine, and lower the guide beam in place by vertically moving the crane and the front lifting point.

⑧Install the trolley of the beam transporting and lifting machine, and lay the track of the trolley behind the beam transporting and lifting machine,

⑨ The trolley for transporting the beam lifter supports the front and middle legs respectively to transport the beam lifter to the position of the beam erection,

⑩The rear outrigger 1 is supported, and the middle outrigger 3 is unfolded into an airfoil, and the beam transporting trolley transports the beam to the front of the beam lifting machine,

Operate the hydraulic system to load the middle outrigger and unload the rear outrigger. The beam lifting machine lifts the beam, the beam transporting trolley exits, the vertical crane slightly lifts the lower guide beam, and synchronously drives the lower guide beam forward with the idler.

The lower guide beam is vertically moved in place, the beam lifting machine drops the beam and the first hole beam is installed,

2) Carry out the construction of the normal hole position, the steps are as follows: the trolley of the beam lifting machine supports the front and middle outriggers respectively, the beam lifting machine is moved forward to enter the next beam erecting station, and the steps 10, 11, and 12 above are repeated until the beam lifting machine is transported. Set up the last two hole beams.

3) Lift the lower guide beam at the end of the bridge, the steps are as follows:

①The rear outriggers are supported and the middle outriggers are deployed into a wing shape by using the hydraulic cylinder 15, and the beam transporting trolley transports the beams to the bottom of the beam lifting machine,

② Operate the hydraulic system to load the middle outrigger and unload the rear outrigger. The beam lifting machine lifts the beam, the beam transporting trolley exits, and the longitudinal traveling crane slightly lifts the lower guiding beam and the longitudinal moving roller synchronously drives the lower guiding beam to reach the abutment.

③ Utilize the vertical moving crown block and the lifting point 14 of the movable oil cylinder to simultaneously lift the lower guide beam to the bridge deck, move the lower guide beam longitudinally so that the lower guide beam rests on the abutment,

④ Loosen the lifting point of the movable oil cylinder, move the lower guide beam vertically, and finally install the box girder in the penultimate hole, move the vertical crane slightly backward and longitudinally move the lower guide beam, and place the end of the lower guide beam on the end of the erected beam ,

⑤ The beam transport trolley supports the rear outrigger of the beam lifting machine, and the beam transporting trolley supports the front outrigger of the beam lifting machine to pass through the hole of the beam lifting machine.

⑥ The beam lifting machine is moved longitudinally into place, and a section of outrigger is removed by using the vertical crane.

⑦The rear outrigger is supported and the middle outrigger is unfolded into a wing shape, and the beam transporting trolley transports the beam to the bottom of the beam lifting machine,

⑧Operate the hydraulic system to load the middle outrigger, unload the rear outrigger, lift the beam by the beam lifting machine, withdraw the beam transport trolley, and lift the lower guide beam synchronously to the bridge deck and the front end by moving the crown crane and the front lifting point synchronously.

⑨ The vertically moving crown block and the supporting roller are synchronously driven to move the lower guide beam vertically by one span, and the concrete box girder in the last hole is installed in place.

4) The bridge erecting machine is transferred along the line, the steps are as follows:

①The beam transporting trolley supports the rear outrigger of the beam lifting machine, and the beam transporting trolley supports the front outrigger of the beam lifting machine, and the beam lifting machine moves longitudinally to the top of the guide beam,

②The hoisting crane of the beam lifting machine lifts the lower guide beam, and the beam transport trolley runs to the lower guide beam,

③ The beam transport trolley and the beam lifting machine cooperate to adjust the position of the lower guide beam,

④ Install the triangular support on the vertical crane, hoist the lower section of the front outrigger to the lower guide beam, and lift the beam transporting trolley to carry the beam lifting machine and the lower guide beam to the next construction site for beam erection.

5) The U-turn operation procedure of the bridge erecting machine, the steps are as follows:

① Put the bridge erecting machine in the state of waiting for U-turn,

②The rear outrigger is supported and the front outrigger is supported, the middle outrigger is empty, and the crown is moved longitudinally to lift the middle outrigger and install it in a U-turn.

③The rear outrigger is supported by the original middle outrigger, the front outrigger is empty, the connection between the front outrigger and the main beam is released, and the front outrigger is hoisted from the outer side of the original middle outrigger to the original middle outrigger by using the longitudinal moving crane. Install the front outrigger at the leg,

④ The original front outrigger and the original middle outrigger are supported, the rear outrigger is empty, and the middle connection system of the rear outrigger is untied, and the rear outrigger is turned around and installed to the original front outrigger position by using the vertical crane.

⑤ The original front outrigger and rear outrigger are supported, the original middle outrigger is empty, and the original middle outrigger is installed forward to the original front outrigger installation position by using the longitudinal moving crane.

⑥Install the oblique bracing of the original front outrigger on the original rear outrigger by using the vertical crane, and shift and install the lifting crane by using the vertical crane.

⑦ The lower guide beam structure is moved longitudinally backward to the abdominal cavity of the beam erecting machine, and the lower guide beam structure is turned around and installed by using the longitudinal moving crane.

6) Carry out spanning operation of the bridge erecting machine, the procedure is as follows:

①The beam erecting machine is located at the previous span to be changed,

②The rear outriggers are jacked up, the middle outriggers are out of the air, the crane is moved longitudinally to lift the middle outriggers,

③ Vertically move the crane to lift the trolley and vertically move it in place for installation.

④ The middle outriggers are loaded, the rear outriggers are empty, and the vertical crane is lifted to install the rear outriggers in place.

This bridging mechanism is ingenious in thinking, simple and reasonable in structure, good in stress state, complete in function, advanced in control, simple in operation, safe and reliable, and its main features are:

1) The functions of beam transport and beam erection are separated, and the beam erecting machine is fixed-point to erect the beam. The structure is simple, the lifting system does not need to travel, the construction load of the beam erection is small and balanced, the whole machine has light weight, low center of gravity, and good stability;

2) Through the self-transposition installation of the outriggers of the beam erecting machine, the variable-span erection and U-turn erection can be realized, and the beam can be erected in the curved section by fine-tuning the lower guide beam on the top of the pier. The machine transport realizes the transition and erection, which improves the adaptability of the lower guide girder bridge erecting machine;

3) The low position of the pier top of the lower guide beam is moved longitudinally through the hole by itself, and the beam erecting machine is carried along the channel of the lower guide beam by the trolley to pass through the hole, which is fast, simple, safe and reliable;

4) The first hole of the bridge head of the lower guide beam automatically enters the beam erecting station, and the end hole of the bridge breaks away from the beam erection station by itself, which solves the problem of erecting the first and last hole beams of the lower guide beam bridge erecting machine;

5) The lifting system statically lifts the concrete box girder, and the load is balanced to ensure the safety of the concrete box girder and the bridge erecting machine. The vertical and horizontal fine-tuning of the lifting system realizes the precise positioning of the concrete box girder erection;

6) The beam transport trolley has the functions of support balance, wheel pressure balance, leveling, direction control, stepless speed regulation, etc., which meets the needs of concrete box girder transportation;

7) The hydraulic control system adopts advanced PLC computer control technology, monitors and operates in real time through the touch screen, and forms an integrated system combining automatic detection, control and supervision.

The invention can safely and quickly complete the girder erection of the bridge head and the bridge tail, and is suitable for the erection of 32m, 24m, 20m double-line single-box equal-span and variable-span railway box girders, and is also suitable for use on roads and urban bridges.

Description of drawings

Figure 1 is a schematic diagram of the structure of the lower guide girder bridge erecting machine

Figure 2 is a side view of the rear outrigger

Figure 3 is a side view of the middle leg

Figure 4 is a side view of the front outrigger

Figure 5 is a side view of the longitudinal crane

Figure 6a and b are schematic diagrams of the structure of the lower guide beam

Figure 7a and b are the main and side views of the structure of the longitudinal traveling crane

Figure 8①- Schematic diagram of bridging steps for the present invention

Specific embodiments The bridge erecting machine is composed of a beam lifting machine, a lower guide beam, and a tire-type beam transporting trolley. The beam lifting machine includes a main structure and a lifting mechanism. The longitudinal crane includes a traveling wheel box and an oil cylinder. The beam transporting machine trolley includes Wheel box assembly. When the bridge erecting machine is used for erecting the bridge, the outrigger wings of the bridge erecting machine interact with the rear outriggers during beam erection, and the fixed-point lifting type is adopted.

Describe structure of the present invention in detail below with reference to accompanying drawing,

Referring to Figure 1, the lower guide girder bridge erecting machine is composed of three major equipments: the girder lifting machine, the lower guide girder, and the tire-type girder transporting trolley:

1. Beam lifting machine

The beam lifting machine is composed of a main structure, a lifting mechanism, a lower guide beam vertically moving crane 6, a beam transporting and lifting machine trolley 10, a movable cylinder lifting point 14, an electrical system, a hydraulic system, and safety devices.

(1) The main structure includes main beam 2, front, middle and rear legs.

① Main beam 2 The main beam is an overall simply supported load-bearing beam composed of two box-shaped longitudinal beams and six box-shaped beams, and forms a beam bearing structure with the front outrigger 9 and middle outrigger 3, and the rear outrigger 1, front outrigger The supporting legs 9 form a feeding beam load-bearing structure, and the main beam cover plate is laid with a track for the longitudinal movement of the crane 6 and a track for the longitudinal fine-tuning of the front and rear lifting trolleys 7 and 8. According to the requirements of U-turn erection, the main girder 2 is designed as a symmetrical structure; according to the requirements of variable-span erection, the design of the main girder 2 reserves 32m span, 24m span, and 20m span outrigger mounting bolt holes, making it suitable for 32m, 24m, 20m double Erection of single-box equal-span and variable-span railway box girders.

②Rear outrigger 1 Refer to Figure 2. The rear outrigger 1 is rigidly connected to the main beam, and it consists of a leg crossbeam and two curved legs to form a crescent-shaped rigid mast. The concrete box girder trolley can pass through the rear outrigger directly to transport the beam under the lifting mechanism. Four 40t jacking cylinders are arranged at the bottom of the rear outrigger 1, which can lift the beam erecting machine to meet the needs when the middle outrigger is opened. The rear outrigger 1 is provided with a temporary lifting point, which can be hoisted to different positions by the vertical crane 6 and then installed together with the main girder to realize the span-changing and U-turn erection of the girder erecting machine at 20m, 24m, and 32m.

③Middle outrigger 3 Referring to Figure 3, the middle outrigger 3 is composed of a outrigger beam, two outrigger bodies, a distribution beam, and a wing cylinder to form a rigid mast structure. Form a beam bearing structure. Middle outrigger 3. The outrigger crossbeam and the outrigger body adopt a double-pin connection structure. After pulling out one pin shaft, the outrigger body can be pushed to rotate relative to the outrigger crossbeam through the expansion and contraction of the wing oil cylinder 15, so as to realize the rigid support of the middle outrigger when erecting the beam. When the beam is fed, the middle outrigger wings are opened. The pin shaft connecting the outrigger beam and the outrigger body adopts an oil cylinder to automatically pull out the pin, and the action of the oil cylinder is controlled by a travel switch. The middle outrigger 3 is provided with a temporary lifting point, which can be hoisted to different positions by the vertical crane 6 and installed together with the main girder 2, so as to realize the erection of 20m, 24m, and 32m spans and U-turn erection of the girder erecting machine.

④Front outrigger 9 Referring to Figure 4, the front outrigger 9 is composed of crossbeams, outrigger bodies, diagonal braces, and bottom beams to form a girder-shaped beam bearing structure. A corbel is arranged on the leg body, and when the beam erecting machine passes through the hole, the corbel is supported on the trolley of the beam erecting machine for carrying and walking. In order to meet the needs of the support at the abutment, the front outrigger 9 is designed as a detachable segmented structure. The front outrigger 9 is provided with a temporary lifting point, which can be hoisted to different positions and installed on the main girder by vertically moving the crane 6, so as to realize the span-changing span erection and U-turn erection of the girder erecting machine at 20m, 24m, and 32m.

(2) Lifting system

The lifting system is divided into front and rear lifting trolleys 8 and 7, and each lifting trolley consists of four 10t slow-speed electric winches and their bases, lifting beams, fixed pulley blocks, movable pulley blocks, distribution beams, spreaders, lifting Steel wire rope etc. The hoisting trolley is fixedly installed on the main girder of the beam erecting machine. The movable pulley block and the spreader are hinged through the distribution beam to change the eight hoisting points into four hoisting points. The problem of static indetermination ensures that the beam body is evenly loaded and the lifting mechanism is safe during the process of lifting the beam body. In order to reduce the height of the whole machine, the beam of the lifting trolley and the fixed pulley block adopt fish-belly structure. The lifting trolley has three-dimensional functions of lifting, vertical and horizontal movement, which can ensure the accurate alignment and installation of the box girder. The lifting action adopts the motor through the reducer and the reel to drive the pulley block, and the vertical and horizontal fine-tuning adopts the oil cylinder pushing and sliding method. . The hoisting hoist adopts frequency converter stepless speed regulation, which is stable and reliable. The high-speed shaft and drum of the hoist are equipped with braking devices. The high-speed shaft adopts a hydraulic push rod brake as a normal running brake, and the drum adopts a hydraulic caliper brake. As an emergency brake, it ensures safe and reliable crane beam operation.

(3) Lower guide beam vertical moving crane Referring to Figure 7, the vertical moving crane 6 is a gantry lifting device with three-dimensional movements across the lifting system, which can run along the entire length of the main beam, and is used for span change and U-turn after installation. Outriggers, middle outriggers, front outriggers, hoisting system, vertically moving lower guide beam and lower guide beam horizontal fine-tuning to adapt to the erection of curved beams.

The vertical traveling crane 6 is composed of traveling wheel box 21, distribution beam 22, longitudinal traveling crane crossbeam 23, sliding seat 24, lateral moving oil cylinder 27, main lifting point oil cylinder 25, auxiliary lifting point oil cylinder 26, etc., the main lifting point oil cylinder It is used to lift the lower guide beam 4, the auxiliary lifting point is used to lift the rear outrigger 1, the middle outrigger 3, the front outrigger 9, the lifting system, etc., and the traverse cylinder is used to push the sliding seat. The running mechanism of the vertical crane adopts 4 passive wheels and 4 driving wheels, which are driven by electricity, and the lower guide beam is driven synchronously with the lower guide beam longitudinal moving roller through the control system.

(4) Carrying trolley The trolley 10 is composed of independent front and rear two sets of single-line double-track trolleys, which can run along the track arranged in the middle of the lower guide beam, and support the front leg 9 and the backstage through the front car The mode of supporting legs 3 in the car support carries the beam erecting machine and moves longitudinally through the hole. The beam-transporting trolley 10 is composed of a wheel box assembly, a load-carrying main beam, and a distribution wheel box. The beam-transporting trolley 10 has a span of 4.2m and a walking speed of 3m/min, and is driven by a motor→reducer→travel wheel way driven. In order to reduce the height of the beam transporting machine trolley, the distribution wheel box and the wheel box assembly adopt a box-type structure.

(5) Movable oil cylinder lifting point Movable oil cylinder lifting point 14 is composed of a lifting beam, a lifting cylinder, and a longitudinal movement device, and is used to assist the longitudinal movement of the crane to realize that the first hole of the lower guide beam enters the bridge position and the end hole leaves the bridge position.

(6) Electrical control system During the bridging operation of the lower guide girder bridge erecting machine, each lifting mechanism, hydraulic system, electrical system, safety device, etc. must be strictly coordinated and controlled. The state changes of each subsystem need to be monitored and adjusted in a timely and accurate manner.

(7) Hydraulic system: The hydraulic system is divided into three pumping stations: the front outrigger pumping station, the rear outrigger pumping station, and the longitudinal crane pumping station. The three pumping stations are operated independently. The front outrigger pumping station is the front lifting trolley 8, two longitudinal moving oil cylinders, two transverse moving oil cylinders, two jacking oil cylinders for the beam transport machine trolley, two lifting oil cylinders with movable lifting points, and push pushing with two movable lifting points Oil cylinder provides power oil source. The rear outrigger pumping station is provided for the rear lifting trolley 7 with two longitudinal moving cylinders, two transverse moving cylinders, two middle outrigger lift cylinders, two middle outrigger plug pin cylinders, and four rear outrigger jacking cylinders. Power oil source. Both the front outrigger pumping station and the rear outrigger pumping station are installed on the main beam of the beam erecting machine. The pumping station of the longitudinal trolley provides the power oil source for the two main lifting point oil cylinders, two auxiliary lifting point oil cylinders and four transverse movement oil cylinders of the longitudinal moving trolley. The longitudinal trolley pumping station is installed on the longitudinal trolley.

2. Lower guide beam The lower guide beam includes lower guide beam 4, longitudinal moving idler 11, middle outrigger 3, longitudinal moving crane 6,

Referring to Figure 6, the structure of the lower guide beam 4 is composed of two box-shaped longitudinal beams and truss-type extensions, which are connected through the middle beam to form an overall simply supported force-bearing structure, providing passages for the feeding beam of the bridge erecting machine and the longitudinal movement of the beam lifting machine. The bottom of the lower guide beam 4 is provided with the running track of the longitudinal moving idler 11 and the running track of the lower guide beam 4 . According to the finite element analysis of the stress condition of the lower guide beam 4, the lower guide beam is composed of two 35m long box girders and two 18m long trusses, with a total length of 553m. The box girder is 2.4m high and 1.8m wide, and is divided into 5 parts. The segments are all welded by Q345D steel, and the segments are connected by high-strength refined bolts.

The lower guide beam 4 is provided with two longitudinal idler rollers 11 altogether, and the longitudinal idler rollers 11 are suspended on the lower guide beam 4 bottom, and can drive and walk on the guide beam 4 . The longitudinal moving idler 11 is provided with a driving device, which is controlled by the control system and synchronously driven by the longitudinal moving crane 6 to move the lower guide beam 4 through the hole.

Referring to Figure 8, Figure 8 is a status diagram of each construction step, wherein ①-12 is a status diagram of the construction steps of the lower guide beam installed by the bridge erecting machine at the bridgehead, and 13 is a status diagram of the construction steps for normal hole positions; 14-22 23-26 is the status diagram of the construction steps of the bridge erecting machine moving along the line, 27-33 is the status diagram of the construction steps of the bridge erecting machine U-turn operation procedure, 34-37 is The status diagram of the construction steps of the bridge erecting machine variable span operation.

Claims (3)

1. The lower guide beam type bridge erecting machine is characterized in that it consists of a beam lifting machine, a lower guide beam, and a tire-type beam transporting trolley. The beam lifting machine consists of a main beam (2), a rear leg (1), and a middle leg (3 ), front outrigger (9), front hoisting trolley (8), rear hoisting trolley (7), lower guide beam vertical moving crane (6), transporting and lifting beam machine trolley (10), movable oil cylinder lifting point ( 14), electrical system, hydraulic system, safety device, main beam and front outrigger (9), middle outrigger (3), rear outrigger (1) are connected by bolts, front lifting trolley (8), rear lifting The heavy trolley (7) and the movable oil cylinder lifting point (14) form a lifting system, which is installed on the main beam track. The trolley (10) for transporting and lifting the beam is composed of two independent front and rear sets of single-track double-track trolleys. The longitudinal traveling crane running along the main girder (2) is composed of traveling wheel box (21), distribution beam (22), longitudinal traveling crown beam (23), sliding seat (24), traversing oil cylinder (27), main The lifting point oil cylinder (25) and the auxiliary lifting point oil cylinder (26) are composed, the traveling wheel box (21) is connected with the distribution beam (22) by a pin shaft, and the longitudinal traveling crown beam (23) is connected with the distribution beam (22) by bolts , the main lifting point oil cylinder (25) and the auxiliary lifting point oil cylinder (26) are fixed on the main beam with pin shafts, The lower guide beam is composed of the lower guide beam structure (4) and the longitudinal moving roller (11). The lower guide beam structure (4) is divided into five segments (16), (17), (18), (19) and (20), all of which are connected by bolts, and the lower guide beam is provided with two longitudinal Carrying roller (11), vertically moving carrying roller is suspended on the lower guide beam bottom. 2. The lower guide beam bridge erecting machine according to claim 1, characterized in that the middle leg (3) consists of a leg beam, two leg bodies, a distribution beam, and a wing cylinder to form a rigid mast structure , the middle outrigger (3), the front outrigger (9) and the main beam form a beam bearing structure. 3. The frame girder method according to claim 1, characterized in that it is carried out according to the following steps: 1) Use the bridge erecting machine to install the lower guide beam at the bridge head, the steps are as follows: ①The beam transport trolley (5) transports the beam lifting machine and the lower guide beam (4) to the bridge head, ②The vertical crane (6) installs the lower section of the front outrigger (9), and the beam transport trolley (5) positions the beam lifting machine on the bridge abutment, ③ Remove the triangular bracket by moving the crane vertically, and the beam transporting trolley and the lifting mechanism of the beam lifting machine cooperate to put the lower guide beam (4) on the bridge head, ④The crown block lifts the rear end of the lower guide beam, and pushes the lower guide beam to the front pier synchronously with the longitudinal idler roller (11), ⑤ Install the guide block on the beam transport trolley, thread and wind the jack rope, consolidate the idler and the lower guide beam, loosen the connection between the beam transport trolley and the lower guide beam, use the lateral positioning plate of the beam transport trolley to guide, and move the sky vertically The car slowly landed and lowered the guide beam to rest on the front pier, ⑥ Loosen the connection between the idler and the lower guide beam, and the idler drives the lower guide beam to slide slowly, ⑦ Lift the guide beam at the front lifting point of the beam lifting machine, and lower the guide beam in place by vertically moving the crane and the front lifting point. ⑧Install the trolley of the beam transporting and lifting machine, and lay the track of the trolley behind the beam transporting and lifting machine, ⑨ The trolley for transporting the beam lifter supports the front and middle legs respectively to transport the beam lifter to the position of the beam erection, ⑩The rear outrigger (1) is supported, the middle outrigger (3) is unfolded into an airfoil, and the beam transporting trolley transports the beam to the front of the beam lifting machine. Operate the hydraulic system to load the middle outrigger and unload the rear outrigger. The beam lifting machine lifts the beam, the beam transporting trolley exits, the vertical crane slightly lifts the lower guide beam, and synchronously drives the lower guide beam forward with the idler. The lower guide beam is vertically moved in place, the beam lifting machine drops the beam and the first hole beam is installed, 2) Carry out the construction of the normal hole position, the steps are as follows: the trolley of the beam lifting machine supports the front and middle outriggers respectively, the beam lifting machine is moved forward to enter the next beam erecting station, and the steps 10, 11, and 12 above are repeated until the beam lifting machine is transported. frame the last two hole beams, 3) Lift the lower guide beam at the end of the bridge, the steps are as follows: ①The rear outriggers are supported and the middle outriggers are deployed into a wing shape by the hydraulic cylinder (15), and the beam transporting trolley transports the beams to the bottom of the beam lifting machine, ② Operate the hydraulic system to load the middle outrigger and unload the rear outrigger. The beam lifting machine lifts the beam, the beam transporting trolley exits, and the longitudinal traveling crane slightly lifts the lower guiding beam and the longitudinal moving roller synchronously drives the lower guiding beam to reach the abutment. ③ Utilize the vertical moving crown block and the lifting point of the movable oil cylinder (14) to synchronously lift the lower guide beam to the bridge deck, move the lower guide beam longitudinally so that the lower guide beam rests on the abutment, ④ Loosen the lifting point of the movable oil cylinder, move the lower guide beam vertically, and finally place the box girder in the penultimate hole for installation, move the vertical crane slightly backward and longitudinally move the lower guide beam, and place the end of the lower guide beam on the end of the erected beam , ⑤ The beam transport trolley supports the rear outrigger of the beam lifting machine, and the beam transporting trolley supports the front outrigger of the beam lifting machine to pass through the hole of the beam lifting machine. ⑥ The beam lifting machine is moved longitudinally into place, and a section of outrigger is removed by using the vertical crane. ⑦The rear outrigger is supported and the middle outrigger is unfolded into a wing shape, and the beam transporting trolley transports the beam to the bottom of the beam lifting machine, ⑧Operate the hydraulic system to load the middle outrigger, unload the rear outrigger, lift the beam by the beam lifting machine, withdraw the beam transport trolley, and lift the lower guide beam synchronously to the bridge deck and the front end by moving the crown crane and the front lifting point synchronously. ⑨ The vertically moving crown block and the supporting roller are synchronously driven to move the lower guide beam vertically by one span, and the concrete box girder in the last hole is installed in place. 4) The bridge erecting machine is transferred along the line, the steps are as follows: ①The beam transporting trolley supports the rear outrigger of the beam lifting machine, and the beam transporting trolley supports the front outrigger of the beam lifting machine, and the beam lifting machine moves longitudinally to the top of the guide beam, ②The hoisting crane of the beam lifting machine lifts the lower guide beam, and the beam transport trolley runs to the lower guide beam, ③ The beam transport trolley and the beam lifting machine cooperate to adjust the position of the lower guide beam, ④ Install the triangular support on the vertical crane, hoist the lower section of the front outrigger to the lower guide beam, and lift the beam transporting trolley to carry the beam lifting machine and the lower guide beam to the next construction site for beam erection. 5) The U-turn operation procedure of the bridge erecting machine, the steps are as follows: ① Put the bridge erecting machine in the state of waiting for U-turn, ②The rear outrigger is supported and the front outrigger is supported, the middle outrigger is empty, and the crown is moved longitudinally to lift the middle outrigger and install it in a U-turn. ③The rear outrigger is supported by the original middle outrigger, the front outrigger is empty, the connection between the front outrigger and the main beam is released, and the front outrigger is hoisted from the outer side of the original middle outrigger to the original middle outrigger by using the longitudinal moving crane. Install the front outrigger at the leg, ④ The original front outrigger and the original middle outrigger are supported, the rear outrigger is empty, and the middle connection system of the rear outrigger is untied, and the rear outrigger is turned around and installed to the original front outrigger position by using the vertical crane. ⑤ The original front outrigger and rear outrigger are supported, the original middle outrigger is empty, and the original middle outrigger is installed forward to the original front outrigger installation position by using the longitudinal moving crane. ⑥Install the oblique bracing of the original front outrigger on the original rear outrigger by using the vertical crane, and shift and install the lifting crane by using the vertical crane. ⑦ The lower guide beam structure is moved longitudinally backward to the abdominal cavity of the beam erecting machine, and the lower guide beam structure is turned around and installed by using the longitudinal moving crane. 6) Carry out spanning operation of bridge erecting machine, the procedure is as follows: ①The beam erecting machine is located at the previous span to be changed, ②The rear outriggers are jacked up, the middle outriggers are out of the air, the crane is moved longitudinally to lift the middle outriggers, ③ Vertically move the crane to lift the trolley and vertically move it in place for installation. ④ The middle outriggers are loaded, the rear outriggers are empty, and the vertical crane is lifted to install the rear outriggers in place.

Images