CN110130229A - A multi-frame juxtaposed double cantilever bridge erecting machine and beam erecting and via-hole method thereof - Google Patents

Abstract

The present application discloses a multi-width juxtaposed double-cantilever bridge erecting machine and a beam erecting method and a method for erecting a beam. The track above the main beam moves back and forth along the construction direction, and the upper part of the front and rear cranes is equipped with a transverse movement mechanism to realize the horizontal movement of the hanging beam to complete multiple simultaneous erection; four sets of outriggers are set under the main truss, From front to back are the front auxiliary legs, the front legs, the middle legs and the rear legs. The front auxiliary legs are set at the front end, and the four sets of legs can move back and forth along the construction direction. The upper part of the front and middle legs A traverse mechanism is set up to realize the lateral movement of the part above the main truss to complete the simultaneous erection of multiple frames. The above-mentioned double-cantilever bridge erection machine adopts cantilever beams at both ends, which can simultaneously erect multiple juxtaposed bridges while meeting the requirements of large-span beams and vias, reducing the bending moment of the vias and reducing the weight of the whole machine.

Description

A multi-frame juxtaposed double cantilever bridge erecting machine and beam erecting and via-hole method thereof

technical field

The present application relates to the technical field of bridge erection machines for bridge construction equipment, and in particular, to a multi-width juxtaposed double cantilever bridge erector and a beam erection and via hole method thereof.

Background technique

The bridge erection machine is a device used to place the prefabricated beams on the prefabricated piers. The bridge erection machine belongs to the category of cranes, because its main function is to lift the beam pieces, then transport them to the position and put them down. But the bridge erection machine is very different from the crane in the general sense. The conditions required by the bridge erecting machine are harsh, and there are beams running on the beam, or longitudinal movement. The bridge erection machine is divided into several types, such as erecting highway bridges, conventional railway bridges, and passenger railway bridges.

The bridge erection machine generally includes: the arm, the hoisting trolley, the first column, the second column and the third column.

The arm is the main bearing beam of the bridge erection machine, which is a double box girder structure. According to the force condition of the arm and the finite element analysis and calculation, each box girder is designed in the form of box deformation section.

The bridge erecting machine is equipped with two hoisting trolleys, each with its own independent hoisting mechanism, running mechanism and traversing mechanism. Each hoisting trolley is equipped with two sets of independent hoisting mechanisms, and the two sets of hoisting mechanisms of the rear trolley balance the forces on the left and right hoisting points through the balancing mechanism, thereby converting the four hoisting points of the bridge erection machine into three The lifting point makes the box girder load evenly and rise and fall smoothly.

The No. 1 column is the front leg of the bridge erection machine, which is supported on the supporting stone in the front half of the front pier. It is mainly composed of supporting and hanging wheel mechanism, folding column, telescopic column and so on. When the beam is erected, it is fixed longitudinally with the machine arm into a hinged structure, which becomes a flexible outrigger, and forms a gantry structure with the machine arm and the second column to meet the support requirements of the beam erection operation. During the longitudinal movement, the No. 1 column and the machine arm can move relative to each other to realize the longitudinal movement of the bridge erecting machine. The No. 1 column is provided with a folding mechanism, which can meet the needs of the bridge abutment support on the No. 1 column when the normal beam and the last hole box beam are erected. The No. 1 column and the machine arm have three fixed positions to meet the erection of three different span box beams.

The second column is located in the middle of the machine arm and is fixed with the machine arm. It is a rigid outrigger. The lower beam of the No. 2 column is provided with two outriggers, and the support pads and removal of the support sleepers are realized by hydraulic cylinders, so as to meet the requirements of stable support during step change during longitudinal movement and beam erection operations. There is a traverse mechanism under the two legs, and the second column is driven by the traverse cylinder to drive the arm to swing its head, so as to adjust the position of the bridge erecting machine horizontally to meet the needs of the curved beam. Due to the needs of the bridge erection machine on the girder truck, the lower beam is designed to be detachable.

The third column is the longitudinal drive pillar of the bridge erection machine, and is designed as a gantry structure in order to meet the requirements of the beam feeding vehicle and the longitudinal drive of the bridge erection machine. It consists of a lifting column, a folding mechanism, a running mechanism, a hydraulic suspension equalizing device, and a steering mechanism.

It is very common to erect highway and railway bridges with bridge erecting machines. When erecting simply supported beams, the crane trolleys first move horizontally to the middle of the two truss girders. Move it between the two abutments, and then move the bridge erection machine and the girder trolley to the exact position to drop the girder.

With the rapid development of the economy, the means of transportation have undergone tremendous changes, and the highway and railway transportation systems have achieved considerable and sustainable development. In road traffic construction, the progress of bridge construction of bridges and extra-large bridges has a significant impact on the completion of the entire traffic line.

Although the existing bridge erecting machine can be constructed, when erecting beams with large spans, the whole machine is heavy, and there are many cases where multiple frames are juxtaposed, and the bending moment of the through hole is large, which is prone to accidents.

SUMMARY OF THE INVENTION

Various aspects of the present application provide a multi-width juxtaposed double-cantilever bridge erecting machine and a beam erecting method and a method for erecting the beams. The cantilever erecting beams at both ends are used to meet the requirements of large-span erecting beams and simultaneously erect multiple parallel beams. The bridge is installed, and the bending moment of the through hole is reduced, and the weight of the whole machine is reduced.

One aspect of the present application provides a multi-width juxtaposed double cantilever bridge erection machine, the double cantilever bridge erection machine includes a main truss, a front crane, a rear crane, a front auxiliary leg, and a front leg , middle outriggers, rear outriggers, of which,

The main truss is along the construction direction, on the top of the main truss, the front crane and the rear crane are arranged, and the front crane and the rear crane are along the The main truss can move back and forth along the construction direction, and a traverse mechanism is arranged on the upper part of the front crane and the rear crane to realize the lateral movement of the hanging beam to complete the simultaneous erection of multiple frames;

Below the main truss, the front auxiliary legs, the front legs, the middle legs and the rear legs are arranged in sequence, wherein the front auxiliary legs are arranged at the most front end, and the The front auxiliary outriggers, the front outriggers, the middle outriggers and the rear outriggers can move back and forth along the construction direction; the upper parts of the front outriggers and the middle outriggers are provided with a traverse mechanism to achieve above the main truss Part of the lateral movement completes the simultaneous erection of multiple frames.

Optionally, the bottom of the front leg is equipped with a telescopic sleeve, the upper supporting roller device of the front leg supports the main truss, the upper part of the front leg is a supporting roller device, and the lower part is anchored with the bridge pier.

Optionally, the upper part of the middle outrigger is a supporting wheel device, and the lower part is supported by eight jacking oil cylinders.

Optionally, the upper part of the rear leg is rigidly connected with the main truss, and the lower part is provided with a jacking oil cylinder.

Another aspect of the present application provides a beam erecting method for a double cantilever bridge erecting machine, the double cantilever bridge erecting machine includes a main truss, a front crane, a rear crane, a front auxiliary outrigger, and a front outrigger , middle outriggers, and rear outriggers, wherein the main truss is along the construction direction, above the main truss, the front crane and the rear crane are set, and the front crane is The crane and the rear crane can move back and forth along the construction direction along the main truss, and the upper part of the front crane and the rear crane is provided with a traverse mechanism to realize the lateral movement of the hoisting beam to complete multiple frames. Simultaneously erected; under the main truss, the front auxiliary leg, the front support leg, the middle support leg and the rear support leg are arranged in sequence, wherein the front auxiliary support leg is arranged at the most front end , the front auxiliary leg, the front outrigger, the middle outrigger and the rear outrigger can move back and forth along the construction direction; The part above the main truss is moved laterally to complete multiple simultaneous erection;

Wherein, the beam erecting method of the double cantilever bridge erecting machine comprises:

The double cantilever bridge erecting machine is in the beam erection position, the front beam transport vehicle carries the steel beam in place, the spreader of the front crane is connected to the front end of the steel beam, and the front crane lifts The steel beam to the front end of the steel beam is separated from the front beam transporter;

The front crane and the rear beam transporter move forward in linkage, the rear end lifting point of the steel beam stops after the rear crane is lowered, and the rear crane sling is connected to the rear end lifting point of the steel beam, The rear crane lifts the steel beam to the rear end of the steel beam and separates from the rear beam transporter;

The front hoisting crane and the rear hoisting crane traveling system are linked and adjusted in place for longitudinal movement, the front hoisting crane and the rear hoisting crane traverse system are linked and traversed and adjusted in place, and the front The hoisting crane is linked with the rear crane hoisting system, and the steel beam is installed at the designated position;

The double cantilever bridge erecting machine is hoisted and fixedly connected to the newly installed steel beam and a certain pre-tightening force is applied, and the prefabricated bridge deck is installed on the steel beam by using the front crane and the rear crane;

Release the connection between the steel beam and the suspension, and the bridge erection machine prepares the hole.

Optionally, the bottom of the front leg is equipped with a telescopic sleeve, the upper supporting roller device of the front leg supports the main truss, the upper part of the front leg is a supporting roller device, and the lower part is anchored with the bridge pier.

Optionally, the upper part of the middle outrigger is a supporting wheel device, and the lower part is supported by eight jacking oil cylinders.

Optionally, the upper part of the rear leg is rigidly connected with the main truss, and the lower part is provided with a jacking oil cylinder.

In yet another aspect of the present application, a method for passing through a double cantilever bridge erecting machine is provided. The double cantilever bridge erecting machine includes a main truss, a front crane, a rear crane, a front auxiliary outrigger, and a front outrigger. , middle outriggers, and rear outriggers, wherein the main truss is along the construction direction, above the main truss, the front crane and the rear crane are set, and the front crane is The trolley and the rear crane can move back and forth along the construction direction along the main truss, and the upper part of the front crane and the rear crane is provided with a traverse mechanism to realize the completion of the horizontal movement of the hoisting beam A plurality of frames are erected at the same time; under the main truss, the front auxiliary legs, the front legs, the middle legs and the rear legs are arranged in sequence, wherein the front auxiliary legs are arranged in At the front end, the front auxiliary leg, the front outrigger, the middle outrigger and the rear outrigger can move back and forth along the construction direction; the upper part of the front outrigger and the middle outrigger is provided with a traverse mechanism In order to realize the lateral movement of the part above the main truss to complete the simultaneous erection of multiple frames;

Wherein, the via method of the double cantilever bridge erection machine includes:

The front crane and the rear crane travel to the middle position of the double cantilever bridge erection machine, and the oil cylinder of the rear outrigger is retracted until it is separated from the steel beam;

Release the safety anchoring device between the middle outrigger and the main truss, activate the longitudinal movement oil cylinder of the middle outrigger and the front outrigger, push the main truss to move in the construction direction, and move the main truss forward Until the front auxiliary leg is located above the bridge pier, supporting the front support leg to the bridge pier;

The main truss is anchored with the front outriggers; the rear outriggers are extended and supported on the beam surface; the middle outriggers are retracted until they are separated from the beam surface, and the traveling reducer is activated to drive the support of the middle outriggers wheel device to move the middle outrigger to the designated position behind the front outrigger in the construction direction; extend the middle outrigger to be supported on the beam surface, and anchor the middle outrigger to the main truss;

Release the anchorage between the front outrigger and the main truss, retract the front outrigger until it is separated from the beam surface; start the traveling reducer to drive the supporting wheel device of the front outrigger, so that the front outrigger moves to the construction direction To the designated position at the rear of the front auxiliary leg, extend the front outrigger to support the bridge pier;

The front crane is moved to the front end of the main truss in the construction direction, and the rear crane is moved to just above the middle outrigger; the rear outrigger is retracted until it is separated from the beam surface.

Release the anchoring device between the middle outrigger and the main truss; start the longitudinal movement oil cylinder of the middle outrigger and the front outrigger to move the main truss to the designated position in the construction direction; The outriggers are anchored with the front outriggers and the main truss; the via holes are in place, and the steel beams are ready to be erected.

Optionally, the bottom of the front outrigger is equipped with a telescopic sleeve, the upper supporting wheel device of the front outrigger supports the main truss, the upper part of the front outrigger is a supporting wheel device, and the lower part is anchored with the bridge pier; The upper part of the middle outrigger is a supporting wheel device, and the lower part is supported by eight jacking oil cylinders; the upper part of the rear outrigger is rigidly connected with the main truss, and the lower part is provided with a jacking oil cylinder.

The above-described multi-width juxtaposed double-cantilever bridge erection machine and its beam erection and through-hole method adopt cantilever erection beams at both ends. The bending moment through the hole reduces the weight of the whole machine.

Description of drawings

FIG. 1 is a schematic structural diagram of a multi-width juxtaposed double-cantilever bridge erecting machine according to an embodiment of the present application.

2-7 are state diagrams of the beam erection process of the multiple juxtaposed double cantilever bridge erecting machines according to another embodiment of the present application.

8-13 are process state diagrams of the plurality of juxtaposed double-cantilever bridge erecting machines according to another embodiment of the present application.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship. Additionally, the terms "system" and "network" are often used interchangeably herein.

As shown in FIG. 1, it is a schematic structural diagram of a double cantilever bridge erecting machine according to an embodiment of the application. The double cantilever bridge erecting machine includes a main truss 1, a front crane 2, a rear crane 3, Front auxiliary outrigger 4, front outrigger 5, middle outrigger 6, rear outrigger 7, electric hoist 8, hanging 9 and spreader beam 10, the spreader beam 10 is used for hoisting the steel beam 11, The work of the cantilever bridge erecting machine, the double cantilever bridge erecting machine also includes the necessary hydraulic system (not shown in the figure) and electrical system (not shown in the figure).

The main truss 1 walks along the construction direction. On the top of the main truss 1, the front crane 2 and the rear crane 3 are set, and the front crane 2 and the rear crane The crane 3 can move back and forth along the main truss 1, and the upper part of the front crane 2 and the rear crane 3 is provided with a traverse mechanism to realize the lateral movement of the hanging beam to complete multiple simultaneous erection. In another embodiment of the present application, the front hoisting crane 2 includes a main hoisting trolley and an auxiliary hoisting trolley, and the auxiliary hoisting trolley is used for paving a bridge deck.

Below the main truss 1, the front auxiliary legs 4, the front legs 5, the middle legs 6 and the rear legs 7 are arranged in sequence, wherein the front auxiliary legs 4 are placed At the front end, the front outriggers 5 and the middle outriggers 6 can be supported on the bridge pier, the rear outriggers 7 can be supported on the completed bridge, the front auxiliary outriggers 4, the front outriggers The legs 5 , the middle outriggers 6 and the rear outriggers 7 are provided with anti-hanging wheels that can move back and forth along the construction direction. The upper part of the front outrigger 5 and the middle outrigger 6 is provided with a traverse mechanism to realize the lateral movement of the upper part of the main truss to complete the simultaneous erection of multiple frames.

The front auxiliary leg 4 adopts a C-shaped design, the bottom of the front leg 5 is equipped with a telescopic sleeve, the upper supporting wheel device of the front leg 5 supports the main truss 1, and the front The upper part is a supporting wheel device, and the lower part is anchored with the bridge pier. The upper part of the middle outrigger 6 is a supporting wheel device, and the lower part is supported by eight jacking oil cylinders. The upper part of the rear outrigger 7 is rigidly connected with the main truss 1, and the lower part is provided with a jacking oil cylinder. The supporting wheel devices of the front outriggers 5 and the middle outriggers 6 are used to push the main truss to move forward through the expansion and contraction of the oil cylinder when the bridge erecting machine passes through the hole.

The electric hoist 8 can be placed on the rearmost side of the main truss 1, that is, the side that has been completed.

In another embodiment of the present application, as shown in FIGS. 2-7 , it is a state diagram of the beam erection process of the double cantilever bridge erecting machine according to another embodiment of the present application. With reference to FIG. 1 , the double cantilever frame The beam erection method of the bridge crane can be described as follows.

In step 201, the bridge erecting machine is in the beam erecting position, the front beam transport vehicle carries the steel beam in place, the spreader of the front crane 2 is connected to the front end lifting point of the steel beam, and the front crane 2 lifts the steel beam to the steel beam The front end is separated from the front beam carriage.

Step 202, the front hoisting crane 2 and the rear beam transporting vehicle move forward in linkage, the rear end lifting point of the steel beam reaches the rear hoisting crane 3 and stops after being lowered, and the rear hoisting crane 3 sling is connected to the rear end lifting point of the steel beam, and the rear hoisting point is lifted. The heavy crane 3 lifts the steel beam until the rear end of the steel beam is separated from the beam transporter.

Step 203, the walking system of the front hoisting crane 2 and the rear hoisting trolley 3 is coordinated and adjusted in place, the front hoisting crane 2 and the rear hoisting crane 3 are linked and the traverse system is adjusted in place, and the front hoisting crane 3 The car 2 is linked with the hoisting system of the rear crane 3, and the steel beam is installed at the designated position.

In step 204, the bridge erection machine is hoisted and connected to the newly installed steel girder and a certain pre-tightening force is applied, and the prefabricated bridge deck is installed on the steel girder by using the front crane 2 and the rear crane 3.

Step 205, release the connection between the steel beam and the suspension, and prepare the bridge erection machine to pass the hole.

Figures 8-13 are state diagrams of the process state of the via hole of the double cantilever bridge erecting machine according to another embodiment of the present application. With reference to Fig. 1 , the via hole process of the double cantilever bridge erection machine can be described as follows.

Step 301, the front crane 2 and the rear crane 3 travel to the middle position of the double cantilever bridge erection machine, and the oil cylinder of the rear outrigger 7 is retracted until it is separated from the steel beam.

Step 302, release the safety anchoring device between the middle outrigger 6 and the main truss 1, activate the longitudinal movement oil cylinder of the middle outrigger 6 and the front outrigger 5, push the main truss 1 to move in the construction direction, and move the main truss 1 forward to the front auxiliary The outriggers 4 are located above the piers and support the front outriggers 5 to the piers.

Step 303, the main truss 1 is anchored with the front outriggers 5; the rear outriggers 7 are extended and supported on the beam surface; the middle outriggers 6 are retracted to be separated from the beam surface, and the walking reducer is started to drive the support of the middle outriggers 6. wheel device to move the middle outrigger 6 to the designated position at the rear of the front outrigger 5 in the construction direction;

Step 304: Release the anchoring of the front outrigger 5 and the main truss 1, and retract the front outrigger 5 until it is separated from the beam surface; start the walking reducer to drive the front outrigger 5 supporting wheel device, so that the front outrigger 5 moves in the construction direction to The rear part of the front auxiliary leg 4 is at a designated position, and the oil cylinder extends out of the front leg 5 and is supported on the bridge pier.

Step 305, the front crane 2 is moved to the front end of the main truss 1 in the construction direction, the rear crane 3 is moved to just above the middle outrigger 6; the rear outrigger 7 is retracted until it is separated from the beam surface.

Step 306, release the anchoring device between the middle outrigger 6 and the main truss 1; start the longitudinal movement oil cylinder of the middle outrigger 6 and the front outrigger 5, so that the main truss 1 moves to the designated position in the construction direction; 6. Anchor with the front leg 5 and the main truss 1; the via hole is in place, and the steel beam is ready to be erected.

To sum up, the double cantilever bridge erection machine adopts cantilever erection beams at both ends, which can meet the requirements of large-span erection beams, reduce the bending moment through holes, and reduce the weight of the whole machine.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: The technical solutions recorded in the embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims (10)

1. several a kind of juxtaposed double cantilever erections machines, which is characterized in that double cantilever erections machines include main couple (1), preceding Hoisting overhead travelling crane (2), rear hoisting overhead travelling crane (3), preceding auxiliary leg (4), front leg strut (5), middle supporting leg (6), rear support leg (7), wherein

The main couple (1) is along construction direction, in the upper surface of described main couple (1), be arranged the preceding hoisting overhead travelling crane (2) and after Hoisting overhead travelling crane (3), and the preceding hoisting overhead travelling crane (2) and the rear hoisting overhead travelling crane (3) can be along construction directions along the main couple (1) Move back and forth, the preceding hoisting overhead travelling crane (2) and rear hoisting overhead travelling crane (3) the top setting transverse-moving mechanism are to realize that hanging beam laterally moves Moving completion, several set up simultaneously；

Below the main couple (1), the preceding auxiliary leg (4), the front leg strut (5), institute are set gradually from front to back State middle supporting leg (6) and the rear support leg (7), wherein the preceding auxiliary leg (4) is set to front end, the preceding auxiliary leg (4), the front leg strut (5), the middle supporting leg (6) and the rear support leg (7) move back and forth along construction direction；

The front leg strut (5) and middle supporting leg (6) top setting transverse-moving mechanism are to realize main couple above section transverse shifting It completes several while setting up.

2. several juxtaposed double cantilever erections machines as described in claim 1, which is characterized in that the front leg strut (5) supports to Bridge pier top surface, the top of the front leg strut (5) are riding wheel apparatus, and middle part is crossbeam, and lower part and bridge pier anchor, the front leg strut (5) bottom is anchored equipped with telescopic and bridge pier, and the top riding wheel apparatus of the front leg strut (5) supports the main couple (1), support It takes turns top and anti-change gear is set in girder lower cover plate two sides, vertical shift mechanism is arranged in support roller top, girder longitudinal movement is realized, before described Transverse-moving mechanism is set on supporting leg (5) crossbeam, realizes main couple above section transverse shifting.

3. several juxtaposed double cantilever erections machines as described in claim 1, which is characterized in that the middle supporting leg (6) is supported on The top of beam-ends, the middle supporting leg (6) is riding wheel apparatus, and middle part is crossbeam, and lower part shares eight jacking cylinders, the middle supporting leg (6) top riding wheel apparatus is consistent with front leg strut (5) function with transverse-moving mechanism, middle supporting leg (6) the crossbeam setting anchor with The anchoring of beam face, middle supporting leg (6) the lower part jacking cylinder support to beam-ends.

4. several juxtaposed double cantilever erections machines as claimed in any one of claims 1-3, which is characterized in that the rear support leg (7) top and the main couple (1) is rigidly connected, and lower part has jacking cylinder to support to beam face.

5. a kind of beam erecting method of several juxtaposed double cantilever erections machines, which is characterized in that double cantilever erections machines include master Truss (1), preceding hoisting overhead travelling crane (2), rear hoisting overhead travelling crane (3), preceding auxiliary leg (4), front leg strut (5), middle supporting leg (6), rear support leg (7), wherein the preceding hoisting overhead travelling crane is arranged in the upper surface of described main couple (1) along construction direction in the main couple (1) (2) and rear hoisting overhead travelling crane (3), and the preceding hoisting overhead travelling crane (2) and it is described after hoisting overhead travelling crane (3) can edge along the main couple (1) Construction direction moves back and forth, and the preceding hoisting overhead travelling crane (2) and rear hoisting overhead travelling crane (3) the top setting transverse-moving mechanism are hung with realizing Beam transverse shifting is completed several while being set up；Below the main couple (1), the preceding auxiliary leg (4), institute are set gradually State front leg strut (5), the middle supporting leg (6) and the rear support leg (7), wherein the preceding auxiliary leg (4) is set to front end, The preceding auxiliary leg (4), the front leg strut (5), the middle supporting leg (6) and the rear support leg (7) can be along construction directions back and forth It is mobile；The front leg strut (5) and middle supporting leg (6) top setting transverse-moving mechanism are to realize main couple above section transverse shifting It completes several while setting up；

Wherein, the beam erecting method of several juxtaposed double cantilever erections machines includes:

Double cantilever erections machines are in erect-position state of setting a roof beam in place, and preceding beam car packs girder steel in place, the preceding hoisting overhead travelling crane (2) Suspender is connect with girder steel front end suspension centre, the preceding hoisting overhead travelling crane (2) promoted the girder steel to the girder steel front end be detached from it is described before Beam car；

The preceding hoisting overhead travelling crane and the linkage of rear beam car move ahead, and stop after girder steel rear end suspension centre to the rear hoisting overhead travelling crane decentralization, Hoisting overhead travelling crane (3) suspender is connect with girder steel rear end suspension centre after described, and the rear hoisting overhead travelling crane (3) promotes the girder steel to steel Beam rear end is detached from the rear beam car；

The preceding hoisting overhead travelling crane is adjusted in place with the rear hoisting overhead travelling crane running gear linkage vertical shift, the preceding hoisting overhead travelling crane and institute State that the linkage of rear hoisting overhead travelling crane crossing system is traversing to be adjusted in place, the preceding hoisting overhead travelling crane and it is described after hoisting overhead travelling crane hoisting system join It is dynamic, by the steel girder erection in designated position；

The above step, which passes sequentially through the preceding hoisting overhead travelling crane, and rear hoisting overhead travelling crane is traversing and main couple is traversing completes other simultaneously Set the erection of beam.

Double cantilever erections machine hangings are fixedly connected with new clothes girder steel and apply certain pretightning force and realize beam body arch camber, are utilized Prefabricated bridge is installed on girder steel by the preceding hoisting overhead travelling crane and rear hoisting overhead travelling crane (3)；

The connection between the girder steel and the hanging is released, Bridge Erector prepares via hole.

6. beam erecting method as claimed in claim 5, which is characterized in that the top of the front leg strut (5) is riding wheel apparatus, middle part For crossbeam, lower part and bridge pier are anchored, the bottom of the front leg strut (5) equipped with the anchoring of telescopic bridge pier, the front leg strut (5) it is upper Portion's riding wheel apparatus support main couple (1).

7. beam erecting method as claimed in claim 5, which is characterized in that the top of the middle supporting leg (6) is riding wheel apparatus, lower part Share eight jacking cylinders.

8. the beam erecting method as described in claim 5-7 any one, which is characterized in that the top of the rear support leg (7) and institute Main couple (1) rigid connection is stated, jacking cylinder is arranged at lower part.

9. a kind of passing method of double cantilever erections machines, which is characterized in that double cantilever erections machines include main couple (1), preceding Hoisting overhead travelling crane (2), rear hoisting overhead travelling crane (3), preceding auxiliary leg (4), front leg strut (5), middle supporting leg (6), rear support leg (7), wherein institute It states main couple (1) and the preceding hoisting overhead travelling crane (2) and rear lifting day is set in the upper surface of described main couple (1) along construction direction Vehicle (3), and the preceding hoisting overhead travelling crane (2) and the rear hoisting overhead travelling crane (3) can be moved back along the main couple (1) along construction direction Dynamic, the preceding hoisting overhead travelling crane (2) and rear hoisting overhead travelling crane (3) the top setting transverse-moving mechanism are to realize that hanging beam transverse shifting is completed Several set up simultaneously；Below the main couple (1), the preceding auxiliary leg (4), the front leg strut (5), institute are set gradually State middle supporting leg (6) and the rear support leg (7), wherein the preceding auxiliary leg (4) is set to front end, the preceding auxiliary leg (4), the front leg strut (5), the middle supporting leg (6) and the rear support leg (7) can move back and forth along construction direction；The front leg strut (5) and middle supporting leg (6) top setting transverse-moving mechanism is to realize that main couple above section transverse shifting completes several framves simultaneously If；

Wherein, the passing method of double cantilever erections machines includes:

The preceding hoisting overhead travelling crane and the rear hoisting overhead travelling crane are walked to the middle position of double cantilever erections machines, the rear support leg Oil cylinder be retracted to disengaging girder steel；

It releases the safe anchor between the middle supporting leg (6) and the main couple (1), starts the middle supporting leg (6) and described Front leg strut (5) vertical shift oil cylinder, main couple (1) described in pushing tow is mobile to construction direction, and the main couple (1) moves forward to described preceding auxiliary Supporting leg (4) is located above bridge pier, supports on the front leg strut (5) to bridge pier；

The main couple (1) and the front leg strut (5) anchor；The rear support leg (7) is stretched out, and Liang Mianshang is supported to；The middle branch Leg (6) is retracted to the beam face that is detached from, and starting driving speed reducer drives the riding wheel apparatus of the middle supporting leg (6), makes the middle supporting leg (6) The front leg strut (5) rear portion designated position is moved to construction direction；It stretches out the middle supporting leg (6) and is supported in Liang Mianshang, it is described Middle supporting leg (6) and the main couple (1) anchor；

It releases the front leg strut (5) and the main couple (1) to anchor, packs up the front leg strut (5) to disengaging beam face；Starting walking Speed reducer drives the riding wheel apparatus of the front leg strut (5), and the front leg strut (5) is made to be moved to the preceding auxiliary supporting leg to construction direction (4) rear portion designated position is stretched out the front leg strut (5) and is supported on bridge pier；

The preceding hoisting overhead travelling crane (2) is moved to the main couple front end to construction direction, and the rear hoisting overhead travelling crane is moved to described Right above middle supporting leg (6)；The rear support leg (7) are packed up to disengaging beam face.

Release the middle supporting leg (6) and the anchor between the main couple (1)；Start the middle supporting leg (6) and it is described before Supporting leg (5) vertical shift oil cylinder, makes the main couple (1) be moved to designated position to construction direction；By the middle supporting leg (6) with it is described Front leg strut (5) and the main couple (1) are anchored；Via hole in place, prepares to set up girder steel.

10. passing method as claimed in claim 9, which is characterized in that the bottom of the front leg strut (5) is equipped with oil cylinder, described The upper beam of front leg strut (5) and the main couple (1) are rigidly connected, and the top of the front leg strut (5) is riding wheel apparatus, lower part It is anchored with bridge pier；The top of the middle supporting leg (6) is riding wheel apparatus, and eight jacking cylinder supports are arranged at lower part；The rear support leg (7) Top and the main couple (1) be rigidly connected, jacking cylinder is arranged at lower part.