CN101851898B - Bridge girder erection machine capable of passing through tunnel and realizing girder erection and bridging process thereof - Google Patents

Abstract

The invention relates to a bridge girder erection machine capable of passing through a tunnel and realizing girder erection and a bridging process thereof. The bridge girder erection machine comprises a mainframe and a lower guide beam, the mainframe comprises a main beam, and also comprises a rear ground jack, a rear guide beam overhead travelling crane, a rear crane trolley, a front crane trolley, a front ground jack, an auxiliary travelling ground jack and a front guide beam overhead travelling crane which are arranged successively from the rear end to the front end of the main beam; a track is arranged on the main beam, and the front crane trolley, the rear crane trolley, the front guide beam overhead travelling crane and the rear guide beam overhead travelling crane run on the track; the lower guide beam comprises a main beam of the lower guide beam, a rear ground jack arranged behind the lower part of the main beam, and a front ground jack arranged in front of the lower part of the main beam; the bridge girder erection machine and the bridging process can realize bridge girder erection and beam erection operations in mountain areas; a mode of mixed beam taking by the crane trolleys of the bridge girder erection machine, a beam transporting vehicle and a pack trolley can realize beam erection at a tunnel portal; and when passing a tunnel, a plurality of components can be retracted and folded to enable the bridge girder erection machine to pass through the channel conveniently without being limited by the diameter of the tunnel, and the bridging construction efficiency is high and the bridging operation is stable.

Description

Bridge erecting machine capable of passing through tunnels and realizing beam erection at tunnel mouth and its bridge erecting process

technical field

The invention relates to a bridge erecting machine capable of passing through tunnels and erecting girders at tunnel entrances, in particular to a bridge erecting device for rapid construction in mountainous areas, and in particular to a new bridge erecting machine for passing through tunnels and erecting beams at tunnel entrances.

Background technique

With the further strengthening and development of my country's infrastructure, the construction of various infrastructures is entering a rapid and steady development stage. The "Eleventh Five-Year Plan" of railways shows that China's railways have entered a stage of leapfrog development, especially since the economic crisis. my country has increased investment in infrastructure such as railways and highways, and railway construction will reach an unprecedented peak. As my country's railway construction enters a stage of continuous and rapid development, a key problem to be solved in the aspect of railway construction is how to carry out railway construction with low construction cost and high construction efficiency to meet the growing demand. So as to keep up with the pace of economic development.

At present, in the process of railway construction, in order not to occupy land and ensure the safety of the railway, the proportion of the elevated part of the railway is increasing. In the elevated line, the large concrete box girder is used as a weight support to become It is an important part on the route, and due to the heavy weight of this large concrete box girder, it is very difficult to transport and construct elevated railways. In the conventional large-tonnage concrete box girder transportation equipment, there are usually the following types of bridge erecting machines. Construction bridge.

1. Auxiliary guide beam bridge erecting machine

Auxiliary guide beam type bridge erecting machine type bridge erecting machine has a tail suspension on the rear main girder of the rear outrigger, the bridge erecting machine picks up the beam at the rear of the rear outrigger, and the beam transport trolley only travels on the beam transport vehicle track.

2. Fixed point lifting bridge erecting machine

The fixed-point lifting bridge-erecting machine is a beam-carrying trolley and the beam trolley runs directly from the beam-carrying car to the beam-dropping position.

3. Walking bridge erecting machine

There is an extra outrigger at the rear of the rear outrigger of the walking bridge erecting machine, and the tail cantilever is long. The bridge erecting machine does not need an auxiliary guide beam to pass the hole, and completes the hole by walking or converting its own outriggers.

4. All-in-one machine for transportation and racking

The all-in-one machine is mainly divided into main engine and guide beam. The main engine takes care of the tasks of beam transportation and beam erection, and the main engine needs to run above the guide beam.

Due to our country's vast territory and different geological conditions, different places such as plains, mountains, hills, and plateaus have different requirements for erecting beams. Compared with mountainous areas, because they are not like flat areas, they need to pass through tunnels, Different operations such as climbing, therefore, for the connection of bridges and tunnels in mountainous areas, the above-mentioned bridge erecting machines have the following disadvantages:

1. The above 1 and 3 cannot complete the opening of the beam;

2. The above 1, 2, and 3 all need to be disassembled to pass through the tunnel;

3. The construction efficiency of the above 4 is very low, and the guide beam requires high stability.

And in order to solve the defects of these existing bridge erecting machines, the inventor of the present application has proposed a kind of novel bridge erecting machine, can overcome these defects, is suitable for carrying out bridge erecting in mountain area.

Contents of the invention

The purpose of the present invention is to provide a bridge erecting machine that can pass through the tunnel and realize the erection of the tunnel mouth beam, which can realize the tunnel erection beam and pass through the tunnel according to the new construction technology and structural design, effectively taking into account the above-mentioned types of bridge erection The lack of machines in the bridge-tunnel connection section.

In order to achieve the above object, the present invention discloses a bridge erecting machine capable of passing through a tunnel and realizing beam erection at the tunnel entrance, including a main engine and a lower guide beam, characterized in that:

The host includes a main girder and a rear outrigger, a rear guide beam crane, a rear hoisting trolley, a front hoisting trolley, a front outrigger, an auxiliary traveling outrigger and a front guide beam crane are installed sequentially from the rear end of the main beam to the front end. , a track is set on the main girder, and the front hoisting trolley, the rear hoisting trolley, the front guide beam crane and the rear guide beam crane run on the track;

The lower guide beam includes the main beam of the lower guide beam, the rear outriggers located at the rear and lower part thereof, and the front outriggers located at the front lower part;

The main girder is supported on the pier by the front outrigger, and the rear outrigger is supported on the bridge surface by a running mechanism;

It is characterized by:

The front lifting trolley and the rear lifting trolley have the same structure, and are all composed of a large vehicle frame, a traverse trolley, a reel, a pulley block, a rope arrangement, an equalizing device, and a longitudinal movement drive device; the reel 6, the pulley block, the row The rope device and equalizing device are all placed on the traversing trolley, which is supported on the large frame, connected with the large frame through the oil cylinder, and connected to the spreader through the reel, pulley block, and wire rope, and the spreader passes through the boom. Connected with the concrete box girder, the longitudinal movement driving device is connected to the large frame by bolts, and the large frame is supported on the track at the top of the main beam, so as to achieve precise positioning of the concrete box girder.

Wherein, the rear outrigger is an O-shaped outrigger, which is connected by a multi-section steel box girder through bolts and hinge supports to form a closed O-shape, and the upper connecting beam is connected with the main beam through bolts and rotary hinges. The rotary hinge realizes the front and rear rotation of the upper part, and the bolt plays a role of fixing. The middle connecting beam is a foldable steel box girder formed by connecting two sections through bolts and hinge supports, the upper part of the foldable steel box girder is connected with the upper connecting beam through bolts and hinge supports, and the lower part is connected with the lower part through bolts Beam connection, the lower connecting beam is a ship-shaped steel box girder connected with a running mechanism, and the running mechanism adopts tires to run.

Wherein, the rear guide beam crane is composed of the rear guide beam crane main girder, herringbone legs, traveling beam, and hanging beam mechanism, and the rear guide beam crane main girder is made of multi-section steel box girder through bolts and hinges. The foldable steel box girder formed by the connection of the support, its two ends are connected with the hanging beam mechanism through the hinge support. The vehicle main girder is connected with the running girder, and the running girder is supported on the track at the top of the main girder through wheels.

Wherein, the upper part of the front outrigger is supported on the bottom track of the main girder through the wheels of the running mechanism, and the lower part is supported on the pier through the foldable steel box girder outrigger, including a telescopic column, which is connected to the telescopic column, the running mechanism, and the foldable steel box girder. The upper curved beam and the transverse connecting beam of the outrigger of the box girder.

Wherein, the auxiliary running legs are composed of an upper running mechanism, a telescopic column and a lower running mechanism. The upper running mechanism is supported on the bottom track of the main beam through the wheels, the lower running mechanism is supported on the track at the top of the lower guide beam through the wheels, and the telescopic column is connected with the upper running mechanism and the lower running mechanism through bolts .

Among them, the front guide beam crane is supported on the track of the truss nose bridge at the front end of the main beam through wheels, and the hanger is connected by a steel wire rope and a pulley block, and the hanger is connected with the lower guide beam through a hanger rod.

Wherein, the cross-section of the lower guide beam is rectangular, the inner side of the rectangle is provided with longitudinal reinforcing ribs and transverse partitions, the top of its upper part is provided with running rails, the lower part of its front end is provided with rails on both sides, and its front end is provided with hoisting holes. The boom is connected with the front guide beam crane, and the rear end is provided with a side hoisting hole, which is connected with the rear guide beam crane through the suspension beam mechanism.

Wherein, the top of the rear leg of the lower guide beam is connected to the lower guide beam through bolts and hinge supports, and the lower part of the lower guide beam is provided with a support cylinder, and the lower part of the support cylinder is equipped with a height-adjustable spiral leg.

Wherein, the top of the front outrigger of the lower guide beam is connected with the lower guide beam through bolts and hinge supports, the top of which is equipped with a running mechanism, and the lower part is provided with a supporting oil cylinder, and the lower part of the supporting oil cylinder is equipped with a height-adjustable screw outriggers.

Among them, the beam erecting process of the bridge erecting machine is as follows:

Step 1: Preparation before erection. The front outriggers and rear outriggers of the lower guide beam are respectively supported on the piers of the pre-erected box girder. On the pier of the box girder, the front outriggers and the front outriggers of the lower guide beam are supported on the same pier, and the auxiliary running legs of the main engine are suspended in the air; After the rear end of the bridge crane, its track is connected with the track on the top of the lower guide beam;

Step 2: The front beam trolley and the rear beam trolley carry the concrete box girder and move longitudinally from the beam transport vehicle to the lower guide beam;

Step 3: After the concrete box girder reaches the designated position, the front lifting trolley lifts the concrete box girder and transports it to the beam drop position together with the rear loading beam trolley, and then the rear lifting trolley lifts the concrete box girder, and the front and rear loading beam platforms The cart is pushed onto the beam transport cart;

Step 4: The front suspension beam crane and the rear guide beam crane respectively hang the lower guide beam. At the same time, the lower guide beam shortens and folds the front and rear outriggers, and moves forward under the action of the front and rear suspension beam cranes to the designated position. The auxiliary running outriggers drop down to hang on the middle of the lower guide beam, the crane on the front guide beam is unloaded and moved to the designated position to lift the lower guide beam again, and the auxiliary walking outriggers leave the lower guide beam;

Step 5: After the lower guide girder is hoisted into place by the front and rear guide girder cranes, its front and rear outriggers are respectively supported on two adjacent bridge piers, and the concrete box girder is accurately dropped on the bridge piers under the action of the front and rear lifting trolleys;

Step 6: After the concrete box girder falls in place, remove the spreader; after the mortar is solidified, retreat the rear guide beam crane and the front and rear lifting trolleys to the rear end of the main beam, and the front guide beam crane to the rear end of the nose bridge; then assist the running support The legs are supported on the top track of the lower guide beam, the front outriggers of the bridge erecting machine are retracted, the rear outriggers are supported, and the auxiliary running outriggers and rear outriggers jointly push the lower bridge erecting machine to cross the span;

Step 7: After the bridge erecting machine completes the span, set up the front outriggers, retract the auxiliary walking outriggers, and set up the rear outriggers to prepare for the erection of the next concrete box.

Through the above-mentioned structure, the bridge erecting machine and the bridge and beam erecting process of the present invention can realize the bridge and beam erection operation in mountainous areas. Size limitation, while in bridge erection, the construction efficiency is high and the operation is stable.

Description of drawings

Fig. 1 is a structural schematic diagram of a bridge erecting machine capable of passing through a tunnel and realizing beam erection at a tunnel mouth according to the present invention.

Figure 2 is a schematic structural view of the rear outrigger.

Figure 3 is a schematic diagram of the rear guide beam crane on the main girder and the guide beam being hoisted down.

Fig. 4 is a schematic diagram of lifting the girder on the main girder by the lifting trolley.

Fig. 5 is a schematic diagram of the front outrigger supported on the pier.

Fig. 6 is a schematic diagram of the auxiliary running outrigger supported on the pier.

Fig. 7 is a schematic diagram of the lower guide beam hoisted by the front suspension beam crane on the nose bridge of the main beam.

Fig. 8 is a schematic diagram of the lower guide beam supported on the pier and the auxiliary running legs supported thereon.

Figure 9 and Figure 10 are schematic diagrams of the front and rear legs of the lower guide beam respectively.

Detailed ways

Referring to FIG. 1 , the bridge erecting machine of the present invention that can pass through a tunnel and realize beam erection at the tunnel entrance mainly includes a main engine and a lower guide beam 10 . Described main engine comprises main beam 4 and from the back end of main beam 4 to the front end (so-called front and back is that the beam erecting direction is the front, vice versa) is installed with rear outrigger 1, rear guide beam crane 2, rear lifting Heavy trolley 3, front hoisting trolley 5, front outrigger 8, auxiliary walking outrigger 6, leading beam crane 7. A track is arranged on the main girder 4, and the front lifting trolley 5, the rear lifting trolley 6, the front guide beam crane 7 and the rear guide beam crane 2 run on the track. The lower guide beam 10 includes the main beam of the lower guide beam, the rear outrigger 11 located at the rear and lower side thereof, and the front outrigger 9 located at the front lower side. During bridging work, the main girder 4 is supported on the pier by the front outrigger 8, and the rear outrigger 1 is supported on the bridge surface by its running mechanism 17.

The front legs 9 of the lower guide beam described with reference to FIG. 10 can run longitudinally along the lower guide beam 10 , be foldable and telescopic, so as to meet the support requirements of different beam types (24m, 32m beams).

Referring to Fig. 9, the rear supporting leg 11 of the lower guide beam is foldable and telescopic, which has satisfied the erection of the end hole beam and the abutment beam.

Referring to Fig. 1 and Fig. 2, the rear leg 1 is an "O"-shaped leg, which is connected by multi-section steel box girders through bolts and hinge supports to form a closed "O" shape. The upper connecting beam 15 is connected with the two longitudinal beams of the main beam 4 through screws and rotary hinges. The rotary hinge realizes the rotation of the upper part front and rear, and the bolts play a role of fixing. The middle connecting beam 16 is supported by two sections through bolts and hinges. The foldable steel box girder formed by connecting the seat, the upper part of the foldable steel box girder 16 is connected with the upper connecting beam 15 through bolts and hinge supports, and the lower part is connected with the lower connecting beam 18 through bolts. The lower connecting beam 18 is a ship-shaped steel box girder connected with the traveling mechanism 17 . The described traveling mechanism 17 is a self-propelled wheel set traveling, and adopts tires to travel. . By removing the traveling mechanism 17, the steel box girder 16 is folded, and the upper connecting girder 15 and the main girder 4 are relatively rotated, thereby reducing the cross-sectional size of the rear legs, and achieving the purpose of the bridge erecting machine of the present invention passing through the tunnel.

1 and 3, the rear guide beam crane 2 is composed of a rear guide beam crane main beam 20, "herringbone" legs 21, a traveling beam 22, and a suspension beam mechanism 23. The main girder 20 of the rear guide beam crane is a foldable steel box girder composed of multiple steel box girders connected by bolts and hinge supports. Its two ends are connected with hanging beam mechanism 23 by hinge bearing. The "herringbone" leg 21 is composed of two sections of steel box girders, the two ends of which are respectively connected with the main beam 20 of the rear guide beam crane and the traveling beam 22 by bolts. Said traveling beam 22 is supported on the track at the top of the main beam 4 by wheels. Before the main engine crosses the span, the rear guide beam crane 2 lifts the lower guide beam 10 through the suspension beam mechanism 23, moves longitudinally along the main beam 4 driven by its traveling beam 22, and cooperates with the front guide beam crane 7 to lift the lower guide beam 10 over across. When the main engine passes through the tunnel, the rear guide beam crane 2 folds the main girder 20 of the rear guide beam crane, and then shortens the suspension beam mechanism 23, which can reduce the section size and achieve the purpose of the bridge erecting machine of the present invention passing through the tunnel.

With reference to Fig. 1, shown in Fig. 4, described front hoisting trolley 5, rear hoisting trolley 3 structures are identical, are all made up of big vehicle frame 24, traverse trolley 25, reel 26, pulley block 27, rope arrangement 28, Equilibrium device 30, vertical movement driving device 29 is formed. The reel 26 , block pulley 27 , rope arrangement 28 , and equalizer 30 are all placed on the traversing trolley 25 . Described traverse trolley 25 is supported on the large vehicle frame 24 by transfer device, is connected with large vehicle frame 24 by oil cylinder, connects hanger 32 by reel 26, block pulley 27, steel wire rope 31, and hanger is connected with hanger 33 through suspender rod 33. The concrete box girder 14 is connected. The longitudinal movement drive device 29 is connected to the large vehicle frame 24 by bolts. Described big vehicle frame 24 is supported on the track on main girder 4 tops by shifter. When the beam is working, the front lifting trolley 5 and the rear lifting trolley 3 can move longitudinally along the main girder 4 through the longitudinal movement driving device 29, and move laterally through the transverse movement trolley 25 to reach the precise positioning of the concrete box girder 14.

The two reels 26 of the front lifting trolley 5 can work independently through the equalizing device 30, and the two reels 26 of the rear lifting trolley 3 can work synchronously through the equalizing device 30, so as to achieve four-point lifting and three-point lifting of the entire lifting system. point of balance.

Referring to Fig. 1 and Fig. 5, the upper part of the front outrigger 8 is supported on the bottom track of the main girder 4 through the wheels of the running mechanism 35, and the lower part is supported on the bridge pier through the foldable steel box girder outrigger 37, including telescopic columns 36, the upper curved beam 39 and the transverse connecting beam 38 connecting the telescopic column 36, the traveling mechanism 35, the collapsible steel box girder leg 37. When erecting the beam, the front supporting leg 8 can reach the support requirement of erecting different beam types (24m, 32m beam) by shortening its telescopic column 36 and running its traveling mechanism 35.

Referring to Fig. 1 and Fig. 6, the auxiliary running leg 6 is composed of an upper traveling mechanism 40, a telescopic column 41 and a lower traveling mechanism 42. The upper traveling mechanism 40 is supported on the bottom track of the main beam 4 through wheels. The described lower traveling mechanism 42 is supported on the track at the top of the lower guide beam 10 through wheels. The telescopic column 41 is connected with the upper traveling mechanism 40 and the lower traveling mechanism 42 through bolts. When the beam is erected, the auxiliary walking legs 6 shorten the telescopic column 41 to achieve the effect of no force when erecting the beam. When passing through the hole, the auxiliary running legs 6 can achieve the function of supporting the main machine by shortening the telescopic column 41 .

Referring to Fig. 1 and Fig. 7, the front guide beam crane 7 is supported on the track of the truss nose bridge at the front end of the main beam 4 through wheels, and the hoist 45 is connected by a steel wire rope and a pulley block, and the hoist 45 is connected with the lower guide beam 10 through a suspender rod . Before passing through the hole, the leading beam crane 7 lifts the lower guiding beam 10 through the spreader 45 to cooperate with the rear hanging beam crane 2, and the lower guiding beam 10 crosses the span.

Referring to Fig. 1, Fig. 8, Fig. 9 and Fig. 10, the cross-section of the lower guide beam 10 is rectangular, and the inner side of the rectangle is provided with longitudinal reinforcing ribs and transverse partitions, the top of its upper part is provided with a running track, and the lower part of its front end Both sides are provided with track, and its front end is provided with hoisting hole, is connected with leading beam crane 7 by boom 45, and the rear end is provided with side hoisting hole, is connected with rear guide beam crane 2 by hanging beam mechanism 23.

The top of the rear support leg 11 of the lower guide beam is connected with the lower guide beam 10 through bolts and hinge supports, and its lower part is provided with a support cylinder, and the lower part of the support cylinder is equipped with a height-adjustable spiral support leg 45 .

The top of the front leg 9 of the lower guide beam is connected with the lower guide beam 10 through bolts and hinge supports, the top of which is equipped with a running mechanism 43, and the lower part is provided with a support cylinder, and the lower part of the support cylinder is equipped with a height-adjustable Spiral legs 45.

When the main engine spans, the lower guide beam 10 supports the auxiliary walking legs 6 by the track at its top. The lower guide beam 10 shortens and folds its front outrigger 9 and rear outrigger 11 to cross the span under the hoisting of the front guide beam crane 7 and the rear suspension beam crane 2, and stretches and unfolds its front support after crossing the span. Legs 9 and rear outriggers 11 are supported on the pier. At the same time, the front outrigger 9 of the lower guide beam can move longitudinally along the lower guide beam 10 under the action of its running mechanism 43 to meet the support of (24m, 32m beams) need. When erecting the beam, the front beam trolley 13 of the front transport beam car is supported on the track at the top of the lower guide beam 10 by a transfer device, and can move longitudinally along the lower guide beam 10 .

The tunnel bridge erecting machine described in the present invention is applicable to the following working conditions:

Working in areas where bridges and tunnels are connected, the bridge erecting machine can pass through the double-lane tunnel under the load of the beam transport vehicle, and can erect beams when the bridge abutment is 4m away from the entrance and exit of the tunnel.

Pass and erect beams on continuous beam (24m, 32m), composite beam and other types of bridges and roadbeds.

The maximum slope of the operation: ≤20‰.

Working curve radius: ≥2000m.

Working altitude: ≤2000m.

Working environment temperature: -20～+50℃.

The maximum wind force in the working environment: level 6 in working state; level 12 in non-working state.

The process of the bridge erecting frame girder that can pass through the tunnel and realize the erection of the tunnel mouth girder according to the present invention is as follows: the equipment is ready for erection, and the front leg 9 and the rear leg 11 of the lower guide beam 10 of the bridge erecting machine are respectively supported on the pre-set On the pier of the box girder, the rear outrigger 1 of the bridge erecting machine is supported on the surface of the erected beam (the oil cylinder is retracted, and the crossties are stressed), and the front outrigger 8 is supported on the pier of the pre-erected box girder. The leg 8 is supported on the same pier as the front leg 9 of the lower guide beam 10 . The auxiliary walking support leg 6 of main frame is suspended in the air at this moment. After the beam transport vehicle 12 carries the concrete beam 14 along the erected beam surface and travels to the rear end of the bridge erecting machine (i.e. the left end of Fig. 1), its track is connected with the track on the top of the lower guide beam 10. At this time, the beam transport vehicle 12 The track and the lower guide beam track are on the same horizontal plane (satisfied by adjusting the front and rear legs of the lower guide beam 10), and are on the same straight line. Afterwards, the front beam trolley 13 carries the concrete beam 14 and directly drives to the designated position of the lower guide beam 10, the front trolley 5 lifts the beam, and the concrete beam 14 is lifted together with the rear beam trolley 46 to move forward, and when it is in place, it moves forward. Heavy trolley 3, rear lifting trolley 5 lift concrete beam 14 simultaneously. Afterwards, the front and rear carrying beam trolleys withdraw from the lower guide beam 10, and the beam transporting vehicle 12 returns to carry the next concrete box girder. The front suspension beam crane 7 and the rear guide beam crane 2 hang the lower guide beam 10 respectively. At the same time, the lower guide beam 10 moves forward to the lower guide beam 10 by shortening and folding the front and rear outriggers, step on. After the whole lower guide beam 10 is moved out, the concrete box girder 14 falls onto the bridge pier under the action of the front and rear lifting trolleys. After the beam erection is completed, the auxiliary running legs 6 of the bridge erecting machine are supported on the top track of the lower guide beam 10, the rear outrigger 1 supports the oil cylinder, and the sleepers are removed. Realize the vertical movement through the hole, and support the front supporting leg 8 after putting in place, just can carry out the erection of next piece of box girder.

The concrete bridge erecting machine passes through the tunnel and erects the girder as follows:

Step 1: The bridge erecting machine is ready for erection. The front outrigger 9 and the rear outrigger 11 of the lower guide beam 10 are respectively supported on the pier of the pre-erected box girder 14, and the rear outrigger 1 of the bridge erecting machine is supported on the erected beam. On the surface (the oil cylinder is retracted, and the crossties are stressed), the front legs 8 are supported on the pier of the pre-framed box girder, and the front legs 8 and the front legs 9 of the lower guide beam 10 are supported on the same pier. The auxiliary walking support leg 6 of main frame is suspended in the air at this moment. After the beam truck 12 carries the concrete beam 14 along the erected beam surface to the rear end of the bridge erecting machine (i.e. the left end of Fig. 1), its track is connected with the track at the top of the lower guide beam 10. Refer to Figure 11.

Step 2: the front beam trolley 13 and the rear beam trolley 46 carry the concrete box girder 14 and guide the beam longitudinally moving downward from the beam transporting trolley. Refer to Figure 12.

Step 3: When the concrete box girder 14 reaches the designated position, the front lifting trolley 5 lifts the concrete box girder 14, and carries it together with the rear beam trolley 46 to the beam drop position, and then the rear lifting trolley 3 lifts the beam 14. Push the front and rear beam trolleys onto the beam transporting trolley. Referring to Figures 13 and 14.

Step 4: The beam transport vehicle 12 returns to the site to pick up the beams. The front suspension beam crane 7 and the rear guide beam crane 2 hang the lower guide beam 10 respectively. At the same time, the lower guide beam 10 moves forward under the action of the front and rear suspension beam cranes by shortening and folding the front and rear outriggers to reach the specified The position auxiliary walking support leg 6 falls and hangs the lower guide beam middle part 10, and the leading guide beam crane 7 is unloaded and moved to the designated position to lift the lower guide beam 10 again, and the auxiliary walking support leg 6 leaves the lower guide beam 10. Refer to Figures 15 and 16.

Step 5: After the lower guide beam 10 is hoisted into place by the front and rear guide beam cranes, its front and rear outriggers are respectively supported on two adjacent bridge piers. The concrete box girder 14 falls accurately on the pier under the action of the front and rear trolleys. Refer to Figure 17.

Step 6: After the concrete box girder 14 falls into place, take off the spreader. After the mortar is solidified, the rear guide beam crane 2 and the front and rear hoisting trolleys are retreated to the main beam 4 rear end, and the front guide beam crane 7 is retreated to the nose bridge rear end. Afterwards, the 6 auxiliary running legs are supported on the top track of the lower guide beam 10, the front legs 8 of the bridge erecting machine are put away, the rear legs 1 are supported, and the auxiliary running legs 6 and the rear legs 1 jointly push the lower bridge erecting machine to pass. across. Refer to Figure 18.

Step 7: After the bridge erecting machine completes the span, set up the front outrigger 8, put away the auxiliary running outrigger 6, and set up the rear outrigger 1 to prepare for the erection of the next concrete box girder 14.

Through the bridge erecting machine of the present invention, the operation of erecting bridges and girders can be realized in mountainous areas. When passing through the tunnel, multiple parts can be shrunk and folded, so that the bridge erecting machine can pass through the tunnel conveniently without being limited by the size of the tunnel. When the bridge is used, the construction efficiency is high and the operation is stable.

Claims (10)

1. A bridge erecting machine that can pass through a tunnel and realize a tunnel mouth beam, comprising a main frame and a lower guide beam, characterized in that: The host includes a main girder and a rear outrigger, a rear guide beam crane, a rear hoisting trolley, a front hoisting trolley, a front outrigger, an auxiliary traveling outrigger and a front guide beam crane are installed sequentially from the rear end of the main beam to the front end. , a track is set on the main girder, and the front hoisting trolley, the rear hoisting trolley, the front guide beam crane and the rear guide beam crane run on the track, The lower guide beam includes the main girder of the lower guide beam, the rear outrigger located at the rear and lower part thereof, and the front outrigger located at the front lower part, the main beam is supported on the pier through the front outrigger, and the rear outrigger is supported on on the bridge; It is characterized by: The front hoisting trolley and the rear hoisting trolley have the same structure, and are composed of a large frame, a traverse trolley, a reel, a pulley block, a rope arrangement, an equalizing device, and a longitudinal movement drive device; the reel, pulley block, and rope arrangement The device and the balancing device are all placed on the traversing trolley, which is supported on the big frame, connected with the big frame through the oil cylinder, connected with the spreader through the reel, pulley block, and wire rope, and the spreader is connected with the hanger through the suspender The concrete box girder is connected, and the longitudinal movement driving device is connected to the large vehicle frame by bolts, and the large vehicle frame is supported on the track at the top of the main beam. 2. The bridge erecting machine according to claim 1, characterized in that, the rear legs are O-shaped legs, which are connected by multi-section steel box girders through bolts and hinge supports to form a closed O-shaped, which The upper connecting beam is connected with the main beam through bolts and rotary hinges. The rotary hinge realizes the rotation of the upper part front and rear, and the bolts play a role in fixing. The middle connecting beam is a foldable steel box formed by connecting two sections through bolts and hinge supports. Beam, the upper part of the foldable steel box girder is connected to the upper connecting beam through bolts and hinge supports, and the lower part is connected to the lower connecting beam through bolts. The lower connecting beam is a ship-shaped steel box girder connected with a running mechanism. The mechanism uses tires to walk. 3. The bridge erecting machine according to claim 1, characterized in that, said rear guide beam crane is composed of rear guide beam crane main girder, herringbone legs, traveling beam, and suspension beam mechanism, and said rear guide beam The main girder of the beam crane is a foldable steel box girder composed of multi-section steel box girders connected by bolts and hinge supports, and its two ends are connected with the hanging beam mechanism through hinge supports. The box girder is composed of two ends of which are respectively connected with the main beam of the rear guide beam crane and the traveling beam through bolts, and the traveling beam is supported on the track at the top of the main beam through wheels. 4. The bridge erecting machine according to claim 1, characterized in that, the upper part of the front outrigger is supported on the bottom track of the main girder by the wheels of the running mechanism, and the lower part is supported on the bridge pier by the foldable steel box girder outrigger , including telescopic columns, connecting telescopic columns, running mechanism, upper curved beams of collapsible steel box girder legs, and transverse connecting beams. 5. The bridge erecting machine according to claim 1, characterized in that, the auxiliary running legs are composed of an upper running mechanism, a telescopic column, and a lower running mechanism, and the described upper running mechanism is supported on the main girder through wheels. On the bottom track, the lower running mechanism is supported on the track at the top of the lower guide beam through wheels, and the telescopic column is connected with the upper running mechanism and the lower running mechanism through bolts. 6. The bridge erecting machine according to claim 1, characterized in that, the leading beam crane is supported on the track of the truss nose bridge at the front end of the main girder through wheels, and the hanger is connected by a steel wire rope and a pulley block, and the hanger is connected to the lower bridge through the hanger rod. Guide beam connection. 7. The bridge erecting machine according to claim 1, characterized in that, the cross-section of the lower guide beam is rectangular, the inner side of the rectangle is provided with longitudinal reinforcing ribs and transverse partitions, the top of the upper part is provided with a running track, and the front end There are rails on both sides of the lower part, and the front end is provided with hoisting holes, which are connected to the front guide beam crane through the boom, and the rear end is provided with side hoisting holes, which are connected to the rear guide beam crane through the suspension beam mechanism. 8. The bridge erecting machine according to claim 1, characterized in that, the top of the rear leg of the lower guide beam is connected to the lower guide beam through bolts and hinge supports, the lower part of which is provided with a supporting oil cylinder, and the support The lower part of the cylinder is equipped with height-adjustable spiral outriggers. 9. The bridge erecting machine according to claim 1, characterized in that the top of the front leg of the lower guide beam is connected to the lower guide beam through bolts and hinge supports, the top is equipped with a running mechanism, and the lower part is provided with a support Oil cylinder, the lower part of the support oil cylinder is equipped with height-adjustable spiral legs. 10. The beam erecting process of the bridge erecting machine according to claims 1 to 9 is as follows: Step 1: Preparation before erection. The front outriggers and rear outriggers of the lower guide beam are respectively supported on the piers of the pre-erected box girder. On the pier of the box girder, the front outriggers and the front outriggers of the lower guide beam are supported on the same pier, and the auxiliary running legs of the main engine are suspended in the air; After the rear end of the bridge crane, its track is connected with the track on the top of the lower guide beam; Step 2: The front beam trolley and the rear beam trolley carry the concrete box girder and move longitudinally from the beam transport vehicle to the lower guide beam; Step 3: After the concrete box girder reaches the designated position, the front lifting trolley lifts the concrete box girder and transports it to the beam drop position together with the rear loading beam trolley, and then the rear lifting trolley lifts the concrete box girder, and the front and rear loading beam platforms The cart is pushed onto the beam transport cart; Step 4: The front suspension beam crane and the rear guide beam crane respectively hang the lower guide beam. At the same time, the lower guide beam shortens and folds the front and rear outriggers, and moves forward under the action of the front and rear suspension beam cranes to the designated position. The auxiliary running outriggers drop down to hang on the middle of the lower guide beam, the crane on the front guide beam is unloaded and moved to the designated position to lift the lower guide beam again, and the auxiliary walking outriggers leave the lower guide beam; Step 5: After the lower guide girder is hoisted into place by the front and rear guide girder cranes, its front and rear outriggers are respectively supported on two adjacent bridge piers, and the concrete box girder is accurately dropped on the bridge piers under the action of the front and rear lifting trolleys; Step 6: After the concrete box girder falls in place, remove the spreader; after the mortar is solidified, retreat the rear guide beam crane and the front and rear lifting trolleys to the rear end of the main beam, and the front guide beam crane to the rear end of the nose bridge; then assist the running support The legs are supported on the top track of the lower guide beam, the front outriggers of the bridge erecting machine are retracted, the rear outriggers are supported, and the auxiliary running outriggers and rear outriggers jointly push the lower bridge erecting machine to cross the span; Step 7: After the bridge erecting machine completes the span, set up the front outriggers, retract the auxiliary walking outriggers, and set up the rear outriggers to prepare for the erection of the next concrete box.

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