CN116553372A - Lifting equipment for bridge construction and bridge construction method - Google Patents

Abstract

The invention discloses lifting equipment for bridge construction and a bridge construction method, wherein the lifting equipment for bridge construction comprises a travelling mechanism, a lifting mechanism, a first travelling mechanism, a power mechanism, a bottom supporting structure and a jacking supporting structure. The tire-type travelling wheels are adopted by the hoisting equipment, so that the transverse occupied space is small, the hoisting equipment is of a cantilever structure and is longitudinally arranged, multiple travelling modes such as transverse, longitudinal and oblique travelling modes can be realized, the condition restriction of the completion of a bridge main body structure is avoided during construction, the simultaneous construction of multiple operation surfaces of multiple piers can be realized, the operation is more flexible, and the construction efficiency is improved; the hoisting equipment is longitudinally distributed along the bridge, can be supported by means of a jacking supporting structure and a bottom supporting structure, has definite stress and high stability and safety, can be used for installing prefabricated piers, prefabricated capping beams and prefabricated beam upper structures (such as prefabricated section beams), installing and transferring pier side brackets, installing bridge deck auxiliary facilities, loading and unloading construction materials and the like, and has high comprehensive utilization rate.

Description

Lifting equipment for bridge construction and bridge construction method

technical field

The invention relates to the field of bridge construction, in particular to a lifting device for bridge construction and a bridge construction method.

Background technique

In recent years, in bridge construction projects, the construction of bridge substructure (pier columns and cap beams, etc.) has gradually replaced the traditional cast-in-place process by prefabricated installation methods, especially in urban bridge projects (such as viaducts). The prefabricated installation method has the advantages of more reliable quality of prefabricated components, high construction efficiency, more environmentally friendly construction site, and less impact on existing road traffic. Drive the rapid improvement of related construction equipment.

At present, the construction of bridge substructures (including pier columns and cover beams) mainly includes two methods: hoisting construction and bridge erecting machine construction. The hoisting construction generally adopts large-tonnage truck cranes or large-tonnage crawler cranes. This hoisting method It has great interference to the construction ground traffic, high environmental requirements, and low construction safety, low efficiency, and poor mobility. In addition, as the size and weight of prefabricated components of bridge piers continue to increase, the limitations of the installation and construction of large-tonnage truck cranes or crawler cranes are becoming more and more obvious. The main purpose of the installation of the bridge erecting machine is to realize the installation of the upper structure of the bridge, and at the same time take into account the installation of the piers of the lower structure. However, this type of bridge erecting machine has many functions, huge equipment and high cost, but the construction efficiency of the bridge erecting machine construction method is very low.

In summary, how to design a lifting device for the construction of bridge substructures with high efficiency, high safety, high maneuverability, little impact on ground traffic, and relatively low environmental requirements is very important for bridge construction.

Contents of the invention

In view of this, the present invention provides a lifting device for bridge construction, which adopts a large cantilever structure and has little impact on the road on the construction ground. The invention also provides a construction method for the lower components of the bridge, which can not only realize the rapid construction of the lower components (pier columns and cover beams), but also reduce the impact on surrounding roads.

It also relates to a bridge construction method.

To achieve the above object, the present invention takes the following technical solutions:

Lifting equipment for bridge construction according to the present invention includes

A walking frame, the walking frame has a vertically arranged truss and a horizontally arranged load-bearing frame, and the load-bearing frame has a pair of longitudinal beams fixedly connected to the top of the truss;

A hoisting mechanism, the hoisting mechanism has a hoisting trolley that travels along the two longitudinal beams and a spreader that is driven up and down by the hoisting trolley;

The first walking mechanism has multiple sets of walking assemblies arranged under the truss, and the walking assembly has a frame beam fixed at the bottom of the truss, at least two mounting parts hinged on the frame beam and at least two pairs of tire-type Walking wheels, each of the mounting parts is equipped with a pair of tire-type walking wheels;

The power mechanism is multiple and corresponds to the walking assembly one by one. A power mechanism is provided on the frame beam of each walking assembly, and the power mechanism has a first power source for driving the tire-type road wheels and driving tires. The second power source for the rotation of the road wheel;

The bottom support structure has multiple sets of support components, which are respectively arranged on the frame beams of the walking components; and

The top support structure is arranged at the cantilever end of the bearing frame.

In the above scheme, one end of the two longitudinal beams is fixed above the truss, and the truss adopts a gate-shaped structure, which can not only meet the load-bearing requirements, but also meet the transportation requirements of the pier columns and cover beams (transport vehicles can pass through the truss smoothly) ), the structure is ingenious. Since only one end of the longitudinal beam is fixed on the truss, the longitudinal beam is suspended in the air (that is, the walking frame is a large cantilever structure), and the top support structure at the cantilever end can act on the top of the temporary support or the installed pier column, which is a heavy-duty The operating conditions provide support points to meet the walking needs of the lifting mechanism.

In the present invention, the power mechanism can not only realize the longitudinal straight running of the tire-type road wheels, but also can turn 90° to the transverse state, and can also run obliquely, so that the present invention can move near the center of the pier, with high maneuverability and reduced damage to the road. The existing road encroachment under the bridge can greatly reduce the impact of bridge construction on road traffic, especially for urban viaduct construction projects. In addition, the ground specific pressure of the tire-type road wheels is close to that of commonly used trucks, and no special treatment is required for the road, which reduces the requirements for existing roads.

In a preferred embodiment of the present invention, the load-carrying frame further includes a front connecting beam connecting the two longitudinal beams together, and the top support structure is arranged on the front connecting beam, which includes at least two The telescopic outriggers arranged at intervals and the first oil cylinder that drives the lower outriggers of the telescopic outriggers up and down, the upper outriggers of the telescopic outriggers are fixed on the front connecting beam, and at least two of the lower outriggers are connected by the bottom beam together.

In this additional solution, the extension and retraction of the piston rod of the first oil cylinder can realize the extension and retraction of the lower legs, and the support height of the top support structure can be flexibly adjusted according to the support height during use, so that the load-bearing frame Being in a horizontal state all the time improves the flexibility of the present invention.

In a more preferred embodiment of the present invention, one of the first oil cylinders is provided on both sides of each of the lower legs, the upper part of the lower legs is hinged to a hinge seat, and the cylinder body of the first oil cylinder is fixed on the On the front connecting beam, the piston rod of the first oil cylinder is connected with the hinged seat. In order to improve the supporting force of the lower outriggers, two first oil cylinders are connected to each lower outrigger, which further improves the supporting effect of the top-height supporting structure.

In a preferred embodiment of the present invention, the lifting trolley includes a traveling beam, a second traveling mechanism, a mounting seat and a hoist; the traveling beam is horizontally erected on the two longitudinal beams;

The second traveling mechanism includes a traveling unit arranged at both ends of the traveling beam and a third power source for driving the traveling unit to walk along the guide rails on the longitudinal beam, and the traveling unit includes at least two The walking wheels moving on the guide rail;

The mounting seat is slidably arranged on the top surface of the walking beam, the hoist is fixed on the mounting seat, and a fixed pulley block matched with the wire rope of the hoisting machine is arranged in the mounting groove of the mounting seat.

More preferably, the walking beam is provided with a second oil cylinder, the bottom of the mounting seat is provided with a slider, the walking beam is provided with a slide rail matched with the slider, and the second oil cylinder drives the mounting seat along the Move back and forth laterally along the slide rail. The lifting trolley of the present invention can move back and forth longitudinally under the drive of the third power source, can adjust the lateral position under the action of the second oil cylinder, and can also realize the adjustment of the hoisting height through the winch, and can realize the prefabricated pier during construction The precise positioning of columns and cap beams further improves construction efficiency.

In a preferred embodiment of the present invention, the spreader includes a fixed frame, a moving pulley block arranged in the fixed frame;

The rotation mechanism has a first motor arranged on the fixed frame, a driving gear driven by the first motor, and a driven gear meshed with the driving gear, and the driven gear is located below the fixed frame;

The lifting frame has a mullion fixed on the driven gear and a lifting beam horizontally arranged at the bottom of the mullion;

The connecting unit has a pair of connecting frames fixed at each end of the lifting beam, a connecting rod vertically arranged on each of the connecting frames, and a connecting piece fixed at the bottom of the connecting rod.

In actual installation, in order to meet the connection requirements of the spreader and the pier column, a pair of lifting rings are arranged at intervals at the bottom of the lifting beam, and the lifting of the prefabricated pier column can be lifted by lifting rope.

In the above scheme, the sling of the present invention can be adjusted vertically, horizontally, and up and down under the action of the lifting trolley, and the sling itself can also perform 360° rotation, which makes the lifting and installation of the prefabricated parts more flexible and improves the prefabricated parts ( The construction efficiency of prefabricated pier columns and prefabricated cap beams), thereby shortening the straight-line construction period of bridge projects.

In a preferred embodiment of the present invention, the hanger further includes a lifting auxiliary support structure arranged at the lower part of the lifting beam and a slope adjustment mechanism for adjusting the slope of the lifting beam, and the slope adjustment mechanism includes a second inclined set There are three oil cylinders and the fourth oil cylinder arranged obliquely, the cylinder bodies of the third oil cylinder and the fourth oil cylinder are hinged on the middle and upper part of the mullion, the piston rod of the third oil cylinder is hinged with the first adjusting arm arranged obliquely, and the The other end of the first adjusting arm is hinged at the bottom of the mullion; the middle part of the lifting beam is vertically provided with a horizontal arm, and the piston rod of the fourth oil cylinder is hinged at the end of the horizontal arm. In the above-mentioned additional scheme, the third oil cylinder can realize the adjustment of the vertical slope, and the fourth oil cylinder can realize the adjustment of the horizontal slope of the lifting beam, so as to meet the design line requirements of the bridge.

In a preferred embodiment of the present invention, the upper part of the mounting part is rotationally connected with the frame beam through a slewing bearing; the first power source is a second motor arranged between each pair of tire-type road wheels The reducer is connected with the transmission of the tire type road wheel;

The number of the second power source is the same as that of the mounting part, which includes a fifth oil cylinder with one end fixed on the frame beam, one end of the fifth oil cylinder is hinged on the frame beam, and one end of the fifth oil cylinder is connected to the frame beam. The second adjusting arm on the bearing seat of the slewing bearing is hinged.

In the above additional solution, each pair of tire-type road wheels can rotate synchronously at a certain angle (less than or equal to 90°) under the action of the fifth oil cylinder, and the forward and backward movement of the walking frame can be realized under the action of the second motor reducer. The flexibility of the traveling frame is improved so that it can work near the pier and reduce the impact on the surrounding roads.

In a preferred embodiment of the present invention, the supporting assembly includes a fixing seat fixed on the bottom of the frame beam, a sixth oil cylinder arranged on the fixing seat, and a supporting base driven up and down by the sixth oil cylinder. When the walking frame is adjusted in place, the sixth oil cylinder drives the support base down to touch the ground. At this time, the support base has a supporting function and effectively shares the load of the tire-type walking wheels.

The present invention also provides a bridge construction method, which adopts the lifting equipment for bridge construction according to the present invention, and specifically includes the following steps:

S1, Construction work of the first set of piers

S11. Install temporary supports near the designed installation position of the bridge pier. The height of the temporary support is higher than that of the prefabricated bridge pier; adjust the height of the top support structure to support it on the temporary support to ensure that the longitudinal beam is in a horizontal state; adjust each bottom support The structure enables each support base to touch the ground and share the load of the tire-type walking wheels;

S12, pass the transport vehicle under the truss, and use the transport vehicle to transport the prefabricated pier to the bottom of the longitudinal girder; adjust the position of the spreader so that the lifting beam is located directly above the prefabricated pier;

S13, use the binding method to connect the lifting beam and the prefabricated bridge pier together, use the lifting trolley to lift up to a certain height, so that the prefabricated bridge pier is separated from the transport vehicle, and the transport vehicle returns to the prefabricated yard;

S14, put the prefabricated pier on the ground after the transport vehicle leaves, and use the lifting rope to connect the upper part of the prefabricated pier with the sling; Lift to the vertical state;

S15, using the trolley to lift the prefabricated pier up so that its bottom is off the ground, and using the first power mechanism and the running mechanism to move as a whole, so that the prefabricated pier is moved to the design position;

Use the lifting trolley to adjust the position of the spreader so that the center of the prefabricated pier coincides with the center of the design position, fix and install the hoisted prefabricated pier at the design position, and then connect the sleeve steel bars and grout according to the conventional process to complete the installation of the prefabricated pier ;

After the construction of the prefabricated pier is completed, the top support structure and the supporting base are put away, and the lifting equipment is moved laterally for a certain distance by using the traveling mechanism and the first power mechanism, and the above steps S12-S15 are repeated to complete the construction of another prefabricated pier;

S2, Construction work of prefabricated cap beams on the first group of prefabricated piers

S21, same as step S11;

S22, pass the transport vehicle under the truss, and use the transport vehicle to transport the prefabricated cover beam to the bottom of the longitudinal beam; adjust the position of the spreader so that the lifting beam is located directly above the prefabricated cover beam;

S23, using a long screw to connect the hoisting beam of the spreader and the prefabricated cover beam together, and using the hoisting trolley to lift up to a certain height so that it is separated from the transport vehicle, and the transport vehicle returns to the prefabrication yard;

S24, use the lifting trolley to continue to lift the prefabricated cover beam upwards, making its bottom higher than the height of the installed pier; adjust the lifting beam of the spreader from vertical to horizontal, so that the prefabricated cover beam is rotated 90 degrees horizontally;

Adjust the position of the spreader and the prefabricated cap beam so that the centerline of the prefabricated cap girder is aligned with the first group of piers installed, then place the prefabricated cap girder on the installed pier column, connect the sleeve steel bars and grout according to the conventional process , to complete the installation of the prefabricated cover beam;

S3, after the construction of the first prefabricated cover beam is completed, the top support structure and the support base are put away, and the lifting equipment is moved longitudinally for a certain distance by using the traveling mechanism and the first power mechanism;

Support the top height support structure of the lifting equipment on the installed pier column, repeat steps S12-S15, and complete the construction work of the second group of pier;

S4, repeating step S2, hoisting the second prefabricated cover beam to the second set of installed piers, connecting the sleeve steel bars and grouting according to the conventional process, and completing the installation of the prefabricated cover beam;

Repeat the above S3 and S4 to complete the construction of multiple groups of prefabricated bridge piers and prefabricated cap beams.

Compared with the prior art, the present invention adopts the lifting equipment for bridge construction of the present invention when constructing the lower part of the bridge, which not only improves the construction efficiency, but also reduces the influence of surrounding roads. Specifically reflected in the following points:

1) Less impact on surrounding roads

The hoisting equipment of the present invention adopts tire-type traveling wheels, which takes up less space in the lateral direction. The hoisting equipment is a cantilever structure and arranged longitudinally, which can meet the hoisting requirements of large-tonnage and large-size prefabricated pier components, and can make full use of existing roads without Add a large number of auxiliary access roads to reduce construction costs.

2) Construction is more flexible, safe and efficient

Existing multifunctional bridge erecting machines, crawler cranes or truck cranes install prefabricated pier components. Due to site conditions and road traffic requirements, it is very difficult to transfer equipment, especially for some large-tonnage and large-size prefabricated pier components. A large number of auxiliary access roads need to be added, which greatly increases equipment investment and construction costs.

However, the hoisting equipment of the present invention adopts a large cantilever structure, which can travel in various ways such as horizontal, vertical and oblique travel, and is not restricted by the completion of the main structure of the bridge during construction, and can realize simultaneous construction of multiple piers and multiple working surfaces, which is more convenient. It is flexible and maneuverable, which improves the construction efficiency; the lifting equipment is arranged along the longitudinal direction of the bridge, which can be supported by the top support structure and bottom support structure, with clear force, high stability and safety.

3) High comprehensive utilization rate

The invention is not only used for the hoisting construction of prefabricated bridge piers, but also can be used for the hoisting construction of prefabricated cover beams, and can also be used for the installation of prefabricated beam superstructures (such as prefabricated segmental beams) and the installation of brackets beside piers during the construction process. and transfer, installation of bridge deck ancillary facilities, loading and unloading of construction materials, etc., with diversified functions and high comprehensive utilization rate.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the traveling frame in Fig. 1 .

Fig. 3 is an enlarged view of one group of walking components in Fig. 1 .

FIG. 4 is a top view of FIG. 3 .

FIG. 5 is a side view of FIG. 3 .

Fig. 6 is a schematic structural view of the support assembly of the present invention.

Fig. 7 is a schematic diagram of the lifting trolley of the present invention.

Fig. 8 is an enlarged schematic view of the lifting trolley in Fig. 1 .

Fig. 9 is an enlarged schematic view of the spreader in Fig. 1 .

Fig. 10 is a structural schematic diagram of the top support structure of the present invention.

Fig. 11 is a schematic diagram of the construction of the first group of bridge piers in the present invention (longitudinal beams erected on temporary supports).

Fig. 12 is a schematic diagram of lifting a bridge pier in the present invention.

Figure 13 is a schematic diagram of lifting the pier (the pier is at the installation position).

Fig. 14 is a construction status diagram of lifting equipment erected on an existing bridge pier.

Fig. 15 is a schematic diagram of lifting the bridge pier in Fig. 14 .

Fig. 16 is a schematic diagram of the pier being hoisted from the longitudinal center to the installation position.

Fig. 17 is a schematic diagram of lifting the prefabricated cover girder in the present invention (the other end of the longitudinal girder is erected on the existing pier).

Fig. 18 is a state diagram of the present invention when lifting the prefabricated cover beam (rotating the prefabricated cover beam vertically to horizontally).

Detailed ways

The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the scope of protection of the present invention is not limited to the following Described embodiment.

In the description of the present invention, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" that may appear should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, Or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention through specific situations.

As shown in FIG. 1 , the lifting equipment for bridge construction of the present invention includes a traveling frame 10 , a lifting mechanism 20 , a first traveling mechanism 30 , a power mechanism, a bottom support structure 40 and a top support structure 50 .

1-2, it can be seen that the walking frame 10 includes a vertically arranged truss 101 and a horizontally arranged load-bearing frame 102, and the load-bearing frame 102 includes two longitudinal beams 102a (using a box girder structure) arranged at intervals on the top of the truss 101 and the The front connecting beam 102b and the rear connecting beam 102c connected together by the longitudinal beam 102a, the longitudinal beam 102a, the front connecting beam 102b and the rear connecting beam 102c form a closed frame, and the longitudinal beam 102a provides a moving space for the walking trolley of the lifting mechanism 20;

The truss 101 includes a pair of lower connecting beams 101a and a pair of uprights 101b fixedly connected to each lower connecting beam 101a, wherein a reinforcing diagonal brace 101d is arranged between one upright 101b and the lower connecting beam 101a, and four uprights 101b The frame 101c is fixedly connected by the connecting frame 202g;

The rear end of the load-carrying frame 102 is fixed on the top of the truss 101, that is, the traveling frame 10 is a large cantilever structure, which takes up less space laterally and is more flexible in walking, which can meet the flexible lifting requirements of prefabricated parts such as piers and bridges.

In actual installation, in order to ensure that the transport vehicle can pass under the truss 101, only one connection frame 202g frame 101c is installed on the upper part of each pair of vertical columns 101b spaced apart laterally, so as to ensure that the transport vehicle can pass under the horizontal connection frame 202g frame 101c.

It can be seen from FIG. 1 and FIGS. 3-5 that the first running gear 30 has four sets of running components arranged under the truss 101 . Specifically, a group of walking assemblies are arranged at intervals on each lower connecting beam 101a. Take one group of walking components as an example to illustrate its specific structure: with reference to Figure 2, it can be seen that the walking component includes a frame beam 301 fixed at one end of the lower connecting beam 101a (the frame beam is longitudinally arranged), and two rotations are arranged on the frame beam 301. The mounting part 302 and at least two pairs of tire type road wheels 303, the top of the mounting part 302 is provided with a slewing bearing 304 (with a bearing seat), and the upper part of the mounting shaft in the slewing bearing 304 is fixed on the frame beam 301; the mounting part 302 The upper connection part is fixed on the bearing seat of the slewing bearing 304 by bolts, and when the bearing seat is rotated by external force, it can drive the mounting part 302 to rotate synchronously to meet the steering requirement.

During actual installation, two pairs of tire-type road wheels 303 can be installed on each frame beam 301, and three pairs or even four pairs of tire-type road wheels 303 can be installed. The logarithm of the tire-type road wheels of the walking assembly can be according to Load determination is not limited to two or three pairs.

Each walking assembly is provided with a power mechanism to meet the requirements of the present invention for lateral walking, oblique walking, turning and longitudinal walking. Specifically, referring to FIG. 5 , it can be known that the power mechanism has a first power source for driving the tire-type road wheels 303 to travel and a second power source for driving the tire-type road wheels 303 to rotate. The first power source is the second motor speed reducer (fixed on the mounting part 302 ) arranged between each pair of tire type road wheels 303, and the second motor speed reducer is connected with the axle transmission of each pair of tire type road wheels 303 ( Wheel shaft and mounting part 302 rotate and cooperate). When working, the second motor reducer drives the tire-type road wheels 303 to travel, and multiple second motor reducers are started synchronously, thereby realizing the horizontal travel, longitudinal travel and oblique travel of the lifting device.

3-5, it can be seen that the second power source includes a fifth oil cylinder 602 whose end is fixed on the frame beam 301, and the number of the fifth oil cylinder 602 is consistent with the number of mounting parts 302 of each walking assembly (that is, each pair of tire-type The traveling wheel 303 is equipped with a fifth oil cylinder 602); the frame beam 301 is provided with a mounting frame 603, and the cylinder body of the fifth oil cylinder 602 is hinged on the mounting frame 603;

A second regulating arm 604 is fixedly connected to each slewing bearing 304 of the walking assembly, and the piston rod 602b of the fifth oil cylinder 602 is hinged to one end of the second regulating arm 604 . When the piston rod 602b of the fifth oil cylinder 602 is extended or retracted, the second adjusting arm 604 is forced to make the bearing seat and the mounting part 302 rotate synchronously, thereby realizing the adjustment of the running direction of the tire type road wheel 303 .

During actual construction, by adjusting the rotation angle of the tire-type traveling wheels 303, the present invention can be converted from horizontal walking to longitudinal walking or oblique walking at a small angle, etc., so that the hoisting is more flexible.

In actual installation, according to load requirements, there may be three pairs of tire-type traveling wheels 303 on the traveling assembly, and correspondingly three pairs of fifth oil cylinders 602 , as shown in FIG. 1 . Of course, the tire-type traveling wheels 303 of the traveling assembly may also be four pairs or five pairs, so as to meet the carrying requirement.

In the present invention, the working process of the power mechanism and the first traveling mechanism 30 is as follows: in the normal driving state, the traveling frame 10 can move back and forth longitudinally; walking; the second motor speed reducer changes direction at the same time, and the tire-type walking wheels 303 return in the same way; The wheel 303 rotates 90°, and the second motor reducer is started to make the traveling frame 10 move forward or backward horizontally; when the piston rod of the fifth oil cylinder 602 is retracted, the tire-type traveling wheel 303 is reset from the transverse rotation of 90° to the longitudinal movement state; when it is necessary to run obliquely, start the fifth oil cylinder 602 synchronously to make its piston rod extend out to a certain length, and each pair of tire-type road wheels 303 rotate at the same angle, and start the second motor reducer to make the walking machine Frame 10 oblique row.

The traveling mechanism and the first motive mechanism of the present invention realize the mutual switching of the longitudinal and lateral walking states of the traveling frame 10, and can also realize any switching between the longitudinal walking state and the oblique traveling state, and any arbitrary switching between the lateral and oblique traveling states. Switching can meet the rapid construction needs of piers and cap beams in different positions.

It can be seen from FIG. 3 and FIG. 6 that the bottom support structure 40 has a support assembly, and at least one support assembly is provided on the frame beam 301 of each walking assembly. The support assembly includes a fixed seat 401 fixed on the bottom of the frame beam 301 , a sixth oil cylinder 402 arranged on the fixed seat 401 and a support base 403 driven up and down by the sixth oil cylinder 402 . When non-walking, when the piston rod of the sixth oil cylinder 402 stretches out, the support base 403 moves downward to make it touch the ground, so as to share the load of the tire type road wheel 303 . During walking, the piston rod of the sixth oil cylinder 402 retracts to make the support base 403 higher than the road, ensuring normal walking and turning of the present invention.

1 and 7-9, it can be seen that the lifting mechanism 20 includes a lifting trolley 201 and a spreader 202 driven up and down by the lifting trolley 201, and the spreader 202 is used to fix prefabricated parts (such as bridge piers and cover beams, etc.); the lifting trolley 201 includes a walking beam 201a, a second traveling mechanism, a mounting seat 201b and a winch 201c; the walking beam 201a is horizontally erected on the two longitudinal beams 102a; the second traveling mechanism includes a walking unit arranged at an end of the walking beam 201a and a drive walking The third power source that the unit walks along the guide rail 102d on the longitudinal beam 102a, there are four groups of walking units to ensure the stable walking of the walking beam 201a; the number of the third power source is consistent with the number of walking units, and the walking units include along the longitudinal The installation frame 201d for the beam 102a to travel, the installation frame 201d is provided with two traveling steel wheels 201e at intervals, the upper surface of the longitudinal beam 102a is provided with a guide rail 101d matched with the traveling steel wheels 201e, and the guide rail 101d is arranged along the longitudinal direction of the longitudinal beam 102a;

The third power source is the third motor reducer 201f fixed on the installation frame 201d, and the third motor reducer 201f is connected with the wheel shaft of one of the traveling steel wheels 201e. When working, a plurality of third motor reducers 201f work in the same direction at the same time, so that four groups of traveling units travel in the same direction along the guide rails on the longitudinal beam 102a, so as to realize the horizontal reciprocation of the lifting trolley 201 on the longitudinal beam 102a.

The upper surface of the walking beam 201a is provided with a pair of slide rails 201g, the direction of the slide rails 201g is consistent with the direction of the walking beam 201a, and the bottom of the mounting seat 201b is provided with two sets of slide blocks that match the slide rails 201g, thereby realizing the installation seat 201b and The sliding installation of the walking beam 201a facilitates the adjustment of the position of the hoist 201c to meet the different lifting requirements of different prefabricated parts.

The winch 201c is fixed in the installation seat 201b, and the fixed pulley block 201h matched with the steel wire rope of the winch machine 201c is arranged in the installation groove in the install seat 201b, the movable pulley block 201i is arranged at the hoisting joint of the wire rope, and the fixed frame 201j is arranged on the movable pulley block 201i , the fixed pulley of the fixed pulley block 201h corresponds to the movable pulley of the movable pulley block 201i up and down, and provides traction guidance for the wire rope of the winch 201c.

It can be seen from FIG. 8 that the traveling beam 201a is provided with a second oil cylinder 203, and the second oil cylinder 203 drives the mounting seat 201b to move back and forth laterally along the slide rail 201g, thereby realizing the adjustment of the horizontal position of the winch 201c.

The specific working process and principle of the lifting trolley 201 of the present invention is as follows: when lifting, the third motor reducer 201f drives the traveling beam 201a to move longitudinally along the guide rail on the longitudinal beam 102a to a designated position. Specifically, the third motor reducer 201f rotates synchronously counterclockwise, so that the traveling steel wheel 201e at the bottom of the traveling beam 201a moves leftward along the guide rail, the third motor reducer 201f synchronously rotates clockwise, and the traveling steel wheel 201e moves along the guide rail Moving to the right can adjust the specific position of the walking beam 201a according to specific needs; when the walking beam 201a is in place, use the second oil cylinder 203 to adjust the lateral position of the winch 201c. Wherein, when the piston rod of the second oil cylinder 203 stretches out, the complete machine of the hoist 201c moves along the direction A in Fig. 3, and when the piston rod of the second oil cylinder 203 retracts, the complete machine of the hoist 201c moves along the direction B in Fig. 3. The adjustment of the lateral position of the hoist 201c is flexibly adjusted according to the actual situation, and the third motor reducer 201f cooperates with the second oil cylinder 203 to realize the adjustment of the hoist 201c in the longitudinal and lateral positions to meet the needs of different working conditions.

7 and 9, it can be seen that the spreader 202 includes a rotating mechanism, a lifting frame, a connecting unit, a lifting auxiliary support structure and a slope adjustment mechanism, and the rotating mechanism has a first motor 202b arranged on the fixed frame 201j, and is driven by the first motor 202b. The driving gear 202c and the driven gear 202d meshed with the driving gear 202c;

There are two first motors 202b and they are arranged symmetrically on the fixed frame 201j. A driving gear 202c is arranged on the motor shaft of each first motor 202b. meshing, and the driving gear 202c and the driven gear 202d have a reduction ratio; the axle of the driven gear 202d is rotatably connected to the fixed frame 201j to ensure that the driven gear rotates relative to the fixed frame.

The lifting frame has a mullion 202e fixed on the axle of the driven gear 202d and a lifting beam 202f horizontally arranged at the bottom of the mullion 202e. During work, if rotation is required, start the first motor 202b, the driving gear 202c of the first motor 202b meshes with the driven gear 202d, and then realize the rotation of the driven gear 202d, and the driven gear 202d drives the lifting frame to rotate synchronously through its wheel shaft, thereby realizing The rotation of the hanger can realize the flexible rotation of the prefabricated part in the horizontal range.

7 and 9, it can be seen that the connecting unit includes a pair of connecting frames 202g fixed on each end of the lifting beam 202f (located at the front and rear sides of the lifting beam 202f), and a connecting rod vertically arranged on each connecting frame 202g. 202h and the connecting piece fixedly connected to the bottom of the connecting rod 202h. In actual installation, the connecting piece is preferably fixed on the nut seat 202k at the bottom of the connecting rod 202h (that is, the long screw), and the long screw can be used to connect the prefabricated cover beam together to realize the fixed connection between the prefabricated part and the hanger 202 . In order to meet the lifting requirements of the prefabricated pier, a lifting ring is provided on the bottom surface of the lifting beam 202f for passing a lifting rope to meet the requirements of the prefabricated pier.

As can be seen from FIG. 9 , the lifting auxiliary support structure includes two pairs of auxiliary outriggers 202m arranged at the bottom of the lifting beam 202f, and each pair of auxiliary outriggers 202m is fixed together by a cross bar 202n to improve the structural stability of the auxiliary support structure.

It can be seen from Fig. 9 that the slope adjustment mechanism includes a third oil cylinder 202p arranged obliquely and a fourth oil cylinder 202q arranged obliquely. The third oil cylinder 202p is used to adjust the lateral gradient, and its cylinder is hinged on the middle and upper part of the mullion 202e. The mullion 202e The first adjusting arm 202r (that is, a pair of adjusting plates hinged on the lower part of the mullion 202e) is hinged on the lower part of the vertical frame. The first adjusting arm 202r is located above the lifting beam 202f. The ends are hinged together. When the piston rod of the third oil cylinder 202p stretches out, the first adjusting arm 202r is forced to rotate downward, so that the C end of the lifting beam 202f is higher than the D end, and the third oil cylinder 202p and the piston rod are retracted. The C-end of the beam 202f is gradually raised.

9, it can be seen that the cylinder body of the fourth oil cylinder 202q is hinged on the middle and upper part of the mullion 202e, the middle part of the lifting beam 202f has a horizontal arm 202s perpendicular to it, and the piston rod of the fourth oil cylinder 202q is hinged on the end of the horizontal arm 202s . The fourth oil cylinder 202q can realize the vertical slope adjustment of the lifting beam 202f.

1 and 10, it can be seen that the top support structure 50 is arranged on the front connecting beam 102b, which includes two telescopic outriggers 501 and a first oil cylinder 502 arranged at intervals, and the upper leg 501a of the telescopic outrigger 501 is fixed on the front connecting beam 102b. On the beam 102b, the lower leg 501b of the telescopic leg 501 is inserted into the inside of the upper leg 501a; a pair of first oil cylinders 502 are arranged on the front connecting beam 102b on both sides of each telescopic leg 501, and a pair of first oil cylinders 502 are arranged on the lower leg 501b. A hinged seat 503 is hinged, the cylinder body of the first oil cylinder 502 is fixed on the front connecting beam 102b, and the piston rods are respectively hinged at one end of the hinged seat 503 . The top height support structure 50 can be used for the temporary support of the front end of the longitudinal beam 102a during the cantilever lifting condition, and it can be supported on the top of the installed pier or temporary support during actual construction, and the longitudinal beam 102a can be kept in a horizontal state. In addition, the two first oil cylinders 502 of each telescopic outrigger 501 expand and contract synchronously, which can realize the adjustment of the telescopic outrigger 501 in the height direction, and further realize its supporting requirements at different heights.

As can be seen from FIG. 10 , the lower bottom beams 504 of the two lower legs 501 b are connected together to further improve the structural strength and stability of the top-height support structure 50 .

The present invention also provides a bridge construction method, using the lifting equipment for bridge construction in the embodiment of the present invention, specifically comprising the following steps:

S1, Construction work of the first set of piers

In actual construction, two bridge piers are usually used to support the cover beam, so it is necessary to install two bridge piers before installing the cover beam. The construction methods of the two piers are the same, taking one of them as an example:

S11, install the temporary support 70 near the designed installation position of the pier, the height of the temporary support 70 is higher than the height of the prefabricated pier; use the first oil cylinder 502 to synchronously adjust the telescopic legs 501, so that the top support structure 50 is supported on the installed temporary support On, ensure that the longitudinal beam 102a is in a horizontal state; adjust each bottom support structure 40 so that each support base 403 touches the ground, and share the load of the tire-type walking wheels 303, as shown in Figure 11;

S12, pass the transport vehicle under the truss 101, use the transport vehicle to place the prefabricated pier longitudinal beam 102a below; use the third motor reducer 201f to move the lifting trolley 201 to the top of the prefabricated pier; use the second oil cylinder 203 to fine-tune the hoist 201c, so that the lifting beam 202f is located directly above the prefabricated pier;

S13, use the binding method to connect the lifting beam 202f and the prefabricated pier together, and use the hoist 201c to lift up to a certain height to make it out of the transport vehicle, as shown in Figure 11; the transport vehicle returns to the prefabrication yard;

S14, lift the prefabricated pier to the ground after the transport vehicle leaves, and use the lifting rope to connect the upper part of the prefabricated pier with the lifting beam 202f; then start the third motor reducer 201f, so that the lifting mechanism 20 moves along the longitudinal beam 102a The upper guide rail moves from left to right, and lifts the prefabricated pier while moving to the right, so that the prefabricated pier is hoisted from the horizontal state to the vertical state with the bottom as the fulcrum, as shown in Figure 12;

S15, using the winch 201c to lift the prefabricated pier up so that its bottom is off the ground, and using the first power mechanism and the first traveling mechanism 30 to move as a whole, so that the prefabricated pier moves to the designed position;

Utilize the third motor reducer 201f and the second oil cylinder 203 to fine-tune the position of the spreader 202, so that the center of the prefabricated bridge pier coincides with the center of the design position, as shown in Figure 13; Connect the sleeve steel bars and grout according to the conventional process, and complete the installation of the prefabricated pier;

After the construction of the prefabricated bridge pier is completed, the top support structure 50 and the support base 403 are put away, and the lifting equipment is moved laterally for a certain distance by using the traveling mechanism and the first power mechanism, and then the above S12-S15 are repeated to complete the construction of another prefabricated bridge pier. Construction work;

S2, Construction work of prefabricated cap beams on the first group of prefabricated piers

S21, use the first oil cylinder 502 to adjust the telescopic outrigger 501 synchronously, so that the top support structure 50 is supported on the installed temporary support, and ensure that the longitudinal beam 102a is in a horizontal state; adjust each bottom support structure 40 so that each support base 403 Touch the ground to share the load of the tire type road wheel 303;

S22, the transport vehicle passes under the truss 101, transports the prefabricated cover beam to the bottom of the longitudinal beam 102a with the transport vehicle, and uses the third motor reducer 201f to move the lifting trolley 201 to the top of the prefabricated cover beam; use the second oil cylinder 203 fine-tune the winch 201c, so that the lifting beam 202f is located directly above the prefabricated cover beam;

S23, use the long screw rod to connect the lifting beam 202f and the prefabricated cover beam together, use the hoist 201c to lift up to a certain height, and make it out of the transport vehicle, as shown in Figure 17 (replace the pier in Figure 17 with a temporary support);

S24, use the hoist 201c to continue to lift the prefabricated cover beam upwards, making its bottom higher than the height of the installed pier; start the first motor 202b, and the first motor 202b drives the lifting beam 202f to rotate horizontally by 90 degrees through the driven gear 202d; use the third motor The speed reducer 201f and the second oil cylinder 203 adjust the position of the spreader 202 and the prefabricated cap beam, so that the center line of the prefabricated cap girder is aligned with the installed first group of piers. Refer to Fig. 18 (see Fig. 18 for the pier to be replaced with Temporary brackets are enough); place the prefabricated cover beam on the installed pier column, connect the sleeve steel bars and grout according to the conventional process, and complete the installation of the prefabricated cover beam;

S3, after the construction of the first prefabricated cover beam is completed, the top support structure 50 and the support base 403 are put away, and the lifting equipment is moved laterally for a certain distance by using the traveling mechanism and the first power mechanism;

Support the top height support structure 50 of the lifting equipment on the installed pier column, repeat steps S12-S15, and complete the construction of the second group of pier. The specific construction process is shown in Figure 14-16;

For long-span bridges, due to the large distance between the piers, the Nth group of piers cannot provide support for the longitudinal beam 102a when the N+1th group of piers are installed during the construction process, and temporary supports can be used for support;

S4, repeat step S2, lift the second prefabricated cap beam to the second group of installed piers, connect the sleeve steel bars and grout according to the conventional process, and complete the installation of the prefabricated cap girder. The specific construction process is shown in Figure 17-18;

Repeat the above S3 and S4 to complete the construction of multiple groups of prefabricated bridge piers and prefabricated cap beams.

Finally, it needs to be emphasized that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the It is still possible to make modifications to the technical solutions described in the above-mentioned embodiments that do not require creative efforts, or to perform equivalent replacements for some of the technical features. Therefore, within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included within the protection scope of the present invention.

Claims (10)

1. A lifting device for bridge construction, characterized in that: comprising A walking frame, the walking frame has a vertically arranged truss and a horizontally arranged load-bearing frame, and the load-bearing frame has a pair of longitudinal beams fixedly connected to the top of the truss; A hoisting mechanism, the hoisting mechanism has a hoisting trolley that travels along the two longitudinal beams and a spreader that is driven up and down by the hoisting trolley; The first walking mechanism has multiple sets of walking assemblies arranged under the truss, and the walking assembly has a frame beam fixed at the bottom of the truss, at least two mounting parts hinged on the frame beam and at least two pairs of tire-type Walking wheels, each of the mounting parts is equipped with a pair of tire-type walking wheels; The power mechanism is multiple and corresponds to the walking assembly one by one. A power mechanism is provided on the frame beam of each walking assembly, and the power mechanism has a first power source for driving the tire-type road wheels and driving tires. The second power source for the rotation of the road wheel; The bottom support structure has multiple sets of support components, which are respectively arranged on the frame beams of the walking components; and The top support structure is arranged at the cantilever end of the bearing frame. 2. The lifting device for bridge construction according to claim 1, characterized in that: the load-bearing frame also includes a front connecting beam connecting the two longitudinal beams together, and the top support structure is arranged on the On the front connecting beam, it includes at least two telescopic legs arranged at intervals and the first oil cylinder that drives the lower leg of the telescopic leg to lift, the upper leg of the telescopic leg is fixed on the front connecting beam, and at least two The two lower legs are connected together by the bottom beam. 3. The lifting device for bridge construction according to claim 2, characterized in that: one first oil cylinder is respectively arranged on both sides of each said lower leg, and the upper part of the lower leg is hinged with a hinge seat, The cylinder body of the first oil cylinder is fixed on the front connecting beam, and the piston rod of the first oil cylinder is connected with the hinge seat. 4. The lifting device for bridge construction according to claim 1, wherein the lifting trolley includes a traveling beam, a second traveling mechanism, a mounting seat and a hoist; The walking beam is horizontally erected on the two longitudinal beams; The second traveling mechanism includes a traveling unit arranged at both ends of the traveling beam and a third power source for driving the traveling unit to walk along the guide rails on the longitudinal beam, and the traveling unit includes at least two The walking wheels moving on the guide rail; The mounting seat is slidably arranged on the top surface of the walking beam, the hoist is fixed on the mounting seat, and a fixed pulley block matched with the wire rope of the hoisting machine is arranged in the mounting groove of the mounting seat. 5. The lifting device for bridge construction according to claim 4, characterized in that: the walking beam is provided with a second oil cylinder, the bottom of the mounting seat is provided with a slider, and the walking beam is provided with a The slide rail is matched with the slide block, and the second oil cylinder drives the mount to move back and forth laterally along the slide rail. 6. The hoisting equipment for bridge construction according to claim 1, characterized in that: the spreader includes a fixed frame, a moving pulley block arranged in the fixed frame; The rotation mechanism has a first motor arranged on the fixed frame, a driving gear driven by the first motor, and a driven gear meshed with the driving gear, and the driven gear is located below the fixed frame; The lifting frame has a mullion fixed on the driven gear and a lifting beam horizontally arranged at the bottom of the mullion; The connecting unit has a pair of connecting frames fixed at each end of the lifting beam, a connecting rod vertically arranged on each of the connecting frames, and a connecting piece fixed at the bottom of the connecting rod. 7. The lifting device for bridge construction according to claim 6, characterized in that: the spreader further comprises a lifting auxiliary support structure arranged at the lower part of the lifting beam and a slope adjustment mechanism for adjusting the slope of the lifting beam , the slope adjustment mechanism includes a third oil cylinder set obliquely and a fourth oil cylinder set obliquely, the cylinder bodies of the third oil cylinder and the fourth oil cylinder are hinged on the middle and upper part of the mullion, and the piston rod of the third oil cylinder is hinged There is a first adjusting arm arranged obliquely, and the other end of the first adjusting arm is hinged on the lower part of the mullion; the middle part of the lifting beam is vertically provided with a horizontal arm, and the piston rod of the fourth oil cylinder is hinged on the horizontal arm. Ends. 8. The lifting device for bridge construction according to claim 1, characterized in that: the upper part of the mounting part is rotationally connected with the frame beam through a slewing bearing; the first power source is provided on each pair of The second motor reducer between the tire-type road wheels is connected with the transmission of the tire-type road wheels; The number of the second power source is the same as that of the mounting part, which includes a fifth oil cylinder with one end fixed on the frame beam, one end of the fifth oil cylinder is hinged on the frame beam, and one end of the fifth oil cylinder is connected to the frame beam. The second adjusting arm on the bearing seat of the slewing bearing is hinged. 9. The lifting device for bridge construction according to claim 1, characterized in that: the support assembly includes a fixing seat fixed at the bottom of the frame beam, the sixth oil cylinder arranged on the fixing seat and the The sixth oil cylinder drives the lifting support base. 10. A bridge construction method, characterized in that: the lifting equipment for bridge construction according to any one of claims 1-9 is adopted, specifically comprising the following steps: S1, Construction work of the first set of piers S11. Install temporary supports near the designed installation position of the bridge pier. The height of the temporary support is higher than that of the prefabricated bridge pier; adjust the height of the top support structure to support it on the temporary support to ensure that the longitudinal beam is in a horizontal state; adjust each bottom support The structure enables each support base to touch the ground and share the load of the tire-type walking wheels; S12, pass the transport vehicle under the truss, and use the transport vehicle to transport the prefabricated pier to the bottom of the longitudinal girder; adjust the position of the spreader so that the lifting beam is located directly above the prefabricated pier; S13, use the binding method to connect the lifting beam and the prefabricated bridge pier together, use the lifting trolley to lift up to a certain height, so that the prefabricated bridge pier is separated from the transport vehicle, and the transport vehicle returns to the prefabricated yard; S14, put the prefabricated pier on the ground after the transport vehicle leaves, and use the lifting rope to connect the upper part of the prefabricated pier with the sling; Lift to the vertical state; S15, using the trolley to lift the prefabricated pier up so that its bottom is off the ground, and using the first power mechanism and the running mechanism to move as a whole, so that the prefabricated pier is moved to the design position; Use the lifting trolley to adjust the position of the spreader so that the center of the prefabricated pier coincides with the center of the design position, fix and install the hoisted prefabricated pier at the design position, and then connect the sleeve steel bars and grout according to the conventional process to complete the installation of the prefabricated pier ; After the construction of the prefabricated pier is completed, the top support structure and the supporting base are put away, and the lifting equipment is moved laterally for a certain distance by using the traveling mechanism and the first power mechanism, and the above steps S12-S15 are repeated to complete the construction of another prefabricated pier; S2, Construction work of prefabricated cap beams on the first group of prefabricated piers S21, same as step S11; S22, pass the transport vehicle under the truss, and use the transport vehicle to transport the prefabricated cover beam to the bottom of the longitudinal beam; adjust the position of the spreader so that the lifting beam is located directly above the prefabricated cover beam; S23, using a long screw to connect the hoisting beam of the spreader and the prefabricated cover beam together, and using the hoisting trolley to lift up to a certain height so that it is separated from the transport vehicle, and the transport vehicle returns to the prefabrication yard; S24, use the lifting trolley to continue to lift the prefabricated cover beam upwards, making its bottom higher than the height of the installed pier; adjust the lifting beam of the spreader from vertical to horizontal, so that the prefabricated cover beam is rotated 90 degrees horizontally; Adjust the position of the spreader and the prefabricated cap beam so that the centerline of the prefabricated cap girder is aligned with the first group of piers installed, then place the prefabricated cap girder on the installed pier column, connect the sleeve steel bars and grout according to the conventional process , to complete the installation of the prefabricated cover beam; S3, after the construction of the first prefabricated cover beam is completed, the top support structure and the support base are put away, and the lifting equipment is moved longitudinally for a certain distance by using the traveling mechanism and the first power mechanism; Support the top height support structure of the lifting equipment on the installed pier column, repeat steps S12-S15, and complete the construction work of the second group of pier; S4, repeating step S2, hoisting the second prefabricated cover beam to the second set of installed piers, connecting the sleeve steel bars and grouting according to the conventional process, and completing the installation of the prefabricated cover beam; Repeat the above S3 and S4 to complete the construction of multiple groups of prefabricated bridge piers and prefabricated cap beams.