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 lifting equipment for bridge construction and a bridge construction method.

Background

In recent years, construction of a lower structure of a bridge (pier, cap beam, etc.) in bridge construction projects is gradually replaced by a prefabricated installation method in a traditional cast-in-place process, particularly 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 environmental protection of construction sites, small influence on the existing road traffic and the like, and the proportion of the prefabricated installation construction bridge pier and the capping beam adopted by the domestic bridge rises year by year, so that the level of relevant construction equipment is also driven to be rapidly improved.

At present, the construction of the lower part component (comprising the pier stud and the bent cap) of the bridge mainly comprises two modes of lifting construction and bridge girder erection machine construction, wherein the lifting construction generally adopts a large-tonnage automobile crane or a large-tonnage crawler crane for installation, and the lifting mode has large interference to the ground traffic of construction, high requirements on the environment, low construction safety, low efficiency and poor maneuvering flexibility. In addition, as the size and weight of the pier prefabricated components are continuously increased, the limitation of the installation and construction of the large-tonnage automobile crane or the crawler crane is more and more obvious. The main purpose of bridge girder erection machine installation is to realize the upper structure installation of bridge, compromise the installation of lower structure pier simultaneously. However, the bridge girder erection machine has the advantages of multiple functions, huge equipment and high manufacturing cost, but the construction efficiency of the bridge girder erection machine construction method is very low.

In conclusion, how to design the lifting equipment for the construction of the lower bridge member, which has the advantages of high efficiency, high safety, high flexibility, small influence on ground traffic and relatively low environmental requirement, is important to bridge construction.

Disclosure of Invention

In view of the above, the invention provides a lifting device for bridge construction, which adopts a large cantilever structure and has less influence on the road on the construction ground. The invention also provides a construction method of the lower component of the bridge, which not only can realize the rapid construction of the lower component (pier column and capping beam), but also can reduce the influence on surrounding roads.

And also relates to a bridge construction method.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the invention relates to a lifting device for bridge construction, which comprises

The walking frame is provided with a truss arranged vertically and a bearing frame arranged horizontally, and the bearing frame is provided with a pair of longitudinal beams fixedly connected to the top of the truss;

the lifting mechanism is provided with a trolley walking along the two longitudinal beams and a lifting appliance driven by the trolley to lift;

the first travelling mechanism is provided with a plurality of groups of travelling assemblies arranged below the truss, each travelling assembly is provided with a frame beam fixed at the bottom of the truss, at least two mounting pieces hinged to the frame beam and at least two pairs of tire-type travelling wheels, and each mounting piece is provided with a pair of tire-type travelling wheels;

The power mechanisms are a plurality of and correspond to the walking components one by one, and each walking component is provided with a power mechanism on a frame beam, and each power mechanism is provided with a first power source for driving the tire-type walking wheel to walk and a second power source for driving the tire-type walking wheel to rotate;

the bottom supporting structure is provided with a plurality of groups of supporting components which are respectively arranged on the frame beams of the walking components; and

and the jacking supporting structure is arranged at the cantilever end of the bearing frame.

In the scheme, one end parts of the two longitudinal beams are fixed above the truss, the truss adopts a door-shaped structure, so that the bearing requirement can be met, the transportation requirement of the pier column and the capping beam can be met (the transport vehicle can smoothly pass through from the lower part of the truss), and the structure is ingenious. Because only one end of the longitudinal beam is fixed on the truss, the longitudinal beam is suspended (namely the walking frame is of a large cantilever structure), and the jacking supporting structure of the cantilever end can act on the top of the temporary support or the installed pier stud, so that a supporting point is provided for heavy-load working conditions, and the walking requirement of the lifting mechanism is met.

In the invention, the power mechanism not only can realize the longitudinal straight running of the tire-type travelling wheel, but also can turn to a 90-degree transverse running state and can also incline, so that the invention can move near the center of the bridge pier, has high flexibility, reduces the occupation of the existing road below the bridge, can greatly reduce the influence of bridge construction on road traffic, and is particularly suitable for the construction project of urban viaducts. In addition, the ground specific pressure of the tire-type travelling wheel is close to that of a common truck, special treatment on the road is not needed, and the requirement on the existing road is reduced.

In a preferred embodiment of the present invention, the load-bearing frame further includes a front connecting beam connecting the two stringers together, the jack-up support structure is disposed on the front connecting beam, and includes at least two telescopic legs disposed at intervals and a first cylinder driving the lower legs of the telescopic legs to lift, the upper legs of the telescopic legs are fixed on the front connecting beam, and at least two lower legs are connected together through a bottom cross beam.

In the additional scheme, the extension and retraction of the piston rod of the first oil cylinder can realize the extension and retraction of the lower supporting leg, and the supporting height of the jacking supporting structure can be flexibly adjusted according to the supporting height when the support is used, so that the bearing frame is always in a horizontal state, and the flexibility of the support is improved.

In a more preferred embodiment of the present invention, two sides of each lower leg are respectively provided with one first oil cylinder, 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. In order to improve the supporting force of the lower supporting legs, each lower supporting leg is connected with two first oil cylinders, so that the supporting effect of the jacking supporting structure is further improved.

In a preferred embodiment of the invention, the lifting trolley comprises a walking beam, a second walking mechanism, a mounting seat and a winch; the walking cross beam is transversely erected on the two longitudinal beams;

the second travelling mechanism comprises travelling units arranged at two ends of the travelling cross beam and a third power source for driving the travelling units to travel along the guide rail on the longitudinal beam, and the travelling units comprise at least two travelling wheels which move along the guide rail;

the installation seat is arranged on the top surface of the walking beam in a sliding way, the winch is fixed on the installation seat, and a fixed pulley block matched with a steel wire rope of the winch is arranged in an installation groove of the installation seat.

More preferably, the walking beam is provided with a second oil cylinder, the bottom of the mounting seat is provided with a sliding block, the walking beam is provided with a sliding rail matched with the sliding block, and the second oil cylinder drives the mounting seat to transversely reciprocate along the sliding rail. The lifting trolley can longitudinally reciprocate under the drive of the third power source, can adjust the transverse position under the action of the second oil cylinder, can realize the adjustment of lifting height through the winch, can realize the accurate positioning of the prefabricated pier column and the capping beam during construction, and further improves the construction efficiency.

In a preferred embodiment of the invention, the lifting appliance comprises a fixed frame and a movable pulley block arranged in the fixed frame; and also comprises

The rotating mechanism is provided with a first motor, a driving gear driven by the first motor and a driven gear meshed with the driving gear, and the driven gear is positioned below the fixed frame;

the lifting frame is provided with a vertical frame fixed on the driven gear and a lifting beam transversely arranged at the bottom of the vertical frame;

the connecting unit is provided with a pair of connecting frames fixed at each end part of the lifting beam, connecting rods vertically arranged on each connecting frame and connecting pieces fixedly connected to the bottoms of the connecting rods.

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

In the scheme, the lifting appliance can realize longitudinal, transverse and lifting adjustment under the action of the lifting trolley, and can rotate 360 degrees, so that the lifting installation operation of prefabricated members is more flexible, the construction efficiency of the prefabricated members (prefabricated pier columns and prefabricated capping beams) is improved, and the linear construction period of bridge engineering is shortened.

In a preferred embodiment of the invention, the lifting appliance further comprises a lifting auxiliary supporting structure arranged at the lower part of the lifting beam and a gradient adjusting mechanism for adjusting the gradient of the lifting beam, wherein the gradient adjusting mechanism comprises a third oil cylinder and a fourth oil cylinder which are obliquely arranged, the cylinder bodies of the third oil cylinder and the fourth oil cylinder are hinged at the middle upper part of the vertical frame, a piston rod of the third oil cylinder is hinged with a first adjusting arm which is obliquely arranged, and the other end of the first adjusting arm is hinged at the lower part of the vertical frame; the middle part of the lifting beam is vertically provided with a horizontal arm, and a piston rod of the fourth oil cylinder is hinged to the end part of the horizontal arm. In the additional scheme, the third oil cylinder can realize the adjustment of the longitudinal gradient, and the fourth oil cylinder can realize the adjustment of the transverse gradient of the lifting beam, so that the design line type requirement of the bridge is met.

In a preferred embodiment of the invention, the upper part of the mounting member is rotatably connected to the frame rail by means of a swivel bearing; the first power source is a second motor speed reducer arranged between each pair of tire-type travelling wheels and is in transmission connection with the tire-type travelling wheels;

the number of the second power sources is consistent with that of the mounting pieces, the second power sources comprise a fifth oil cylinder, one end of the fifth oil cylinder is 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 hinged with a second adjusting arm arranged on a bearing seat of the slewing bearing.

In the additional scheme, each pair of tire-type travelling wheels can synchronously rotate for a certain angle (less than or equal to 90 degrees) under the action of the fifth oil cylinder, and the travelling frame can move forwards and backwards under the action of the second motor speed reducer, so that the flexibility of the travelling frame is improved, the travelling frame can work nearby a bridge pier, and the influence on surrounding roads is reduced.

In a preferred embodiment of the present invention, the support assembly includes a fixed seat fixed at the bottom of the frame beam, a sixth cylinder disposed on the fixed seat, and a support base driven to rise and fall by the sixth cylinder. When the walking frame is adjusted in place, the sixth oil cylinder drives the supporting base to descend to touch the ground, and the supporting base has supporting function at the moment and effectively shares the tyre-type walking wheels

The invention also provides a bridge construction method, which adopts the hoisting equipment for bridge construction, and specifically comprises the following steps:

s1, construction operation of a first group of piers

S11, installing a temporary support near the pier design installation position, wherein the height of the temporary support is higher than that of the prefabricated pier; the height of the jacking supporting structure is adjusted to enable the jacking supporting structure to be supported on the temporary support, and the longitudinal beam is ensured to be in a horizontal state; each bottom supporting structure is adjusted to enable each supporting base to touch the ground, so that the load of the tire-type travelling wheel is shared;

S12, passing a transport vehicle from the lower part of the truss, and transporting the prefabricated bridge pier to the lower part of the longitudinal beam by using the transport vehicle; the position of the lifting appliance is adjusted, so that the lifting beam of the lifting appliance is positioned right above the prefabricated bridge pier;

s13, connecting the lifting beam and the prefabricated bridge pier together by adopting a binding method, lifting the lifting trolley upwards by a certain height to separate the prefabricated bridge pier from the transport vehicle, and returning the transport vehicle to the prefabricated field;

s14, after the transport vehicle is driven off, placing the prefabricated bridge pier on the ground, and connecting the upper part of the prefabricated bridge pier with a lifting appliance by using a lifting rope; lifting one end of the prefabricated pier by using a lifting trolley to enable the end of the prefabricated pier to be lifted to a vertical state from a horizontal state by taking the bottom as a fulcrum;

s15, lifting the prefabricated bridge pier by using a lifting trolley, lifting the bottom of the prefabricated bridge pier to separate from the ground, and moving the prefabricated bridge pier to a designed position by using the first power mechanism and the travelling mechanism to integrally move;

the position of a lifting appliance is adjusted by using a lifting trolley, so that the center of a precast pier is overlapped with the center of a design position, the precast pier lifted in place is fixedly arranged at the design position, and then sleeve steel bars and grouting are connected according to a conventional process, so that the installation of the precast pier is completed;

after the construction of the prefabricated pier is completed, the jacking supporting structure and the supporting base are retracted, the lifting equipment is transversely moved for a certain distance by utilizing the travelling mechanism and the first power mechanism, and the S12-S15 are repeated, so that the construction operation of the other prefabricated pier is completed;

S2, construction operation of prefabricated capping beams on the first group of prefabricated piers

S21, a step S11;

s22, passing a transport vehicle from below the truss, and transporting the prefabricated capping beam to the position below the longitudinal beam by using the transport vehicle; the position of the lifting appliance is adjusted to enable the lifting beam to be positioned right above the prefabricated cover beam;

s23, connecting a lifting beam of the lifting appliance with a prefabricated cover beam by using a long screw rod, and lifting the lifting beam to a certain height by using a trolley to separate from a transport vehicle, wherein the transport vehicle returns to a prefabricated field;

s24, continuously lifting the prefabricated capping beam upwards by using the lifting trolley to enable the bottom of the prefabricated capping beam to be higher than the installed bridge pier; the lifting beam of the lifting appliance is adjusted to be transverse from the longitudinal direction, so that the prefabricated cover beam horizontally rotates by 90 degrees;

the positions of the lifting appliance and the prefabricated capping beam are adjusted to enable the central line of the prefabricated capping beam to be centered with the installed first group of piers, then the prefabricated capping beam is placed on the installed pier stud, sleeve steel bars are connected and grouting is carried out according to the conventional process, and the installation of the prefabricated capping beam is completed;

s3, after the construction of the first prefabricated bent cap is completed, the jacking supporting structure and the supporting base are retracted, and the hoisting equipment is longitudinally moved for a certain distance by utilizing the travelling mechanism and the first power mechanism;

supporting the jacking supporting structure of the lifting equipment on the installed pier column, repeating the steps S12-S15, and completing construction operation of the second group of pier;

S4, repeating the step S2, hoisting a second prefabricated capping beam to a second group of installed piers, connecting sleeve steel bars according to a conventional process, and grouting to complete the installation of the prefabricated capping beam;

and (3) repeating the steps (S3) and (S4) to finish the construction operation of a plurality of groups of prefabricated piers and prefabricated capping beams.

Compared with the prior art, the lifting equipment for bridge construction is adopted when the lower part component of the bridge is constructed, so that the construction efficiency can be improved, and the influence on surrounding roads can be reduced. The specific points are as follows:

1) Less influence on surrounding roads

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, the hoisting requirements of large-tonnage and large-size prefabricated pier components can be met, the existing road can be fully utilized, a large number of auxiliary channels are not required to be added, and the construction cost is reduced.

2) The construction is more flexible, safe and efficient

The existing multifunctional bridge girder erection machine, crawler crane or automobile crane is provided with prefabricated pier components, the equipment is very difficult to transfer due to the field conditions and road traffic protection requirements, and particularly for some large-tonnage and large-size prefabricated pier components, a large number of auxiliary channels are required to be added for crane transfer, so that the equipment investment and construction cost are greatly improved.

The hoisting equipment adopts a large cantilever structure, can realize various walking modes such as transverse, longitudinal, oblique and the like, is not limited by the completion condition of the bridge main body structure during construction, can realize the simultaneous construction of a plurality of operation surfaces of a plurality of piers, is more flexible and improves the construction efficiency; the hoisting equipment is longitudinally distributed along the bridge, can be supported by means of the jacking supporting structure and the bottom supporting structure, and is clear in stress, high in stability and safety.

3) High comprehensive utilization rate

The invention is not only used for the hoisting construction of the precast pier, but also used for the hoisting construction of the precast cap beam, and can also be used for the installation of the upper structure of the precast beam (such as the precast segment beam), the installation and transfer of a bracket beside the pier, the installation of auxiliary facilities of the bridge deck, the loading and unloading operation of construction materials and the like in the construction process, and has diversified functions and high comprehensive utilization rate.

Drawings

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

Fig. 2 is a schematic view of the walking frame of fig. 1.

Fig. 3 is an enlarged view of one of the sets of walking components of 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 view of the structure of the support assembly according to the present invention.

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

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

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

Fig. 10 is a schematic view of the structure of the jacking support according to the present invention.

Fig. 11 is a schematic view of the construction of a first group of piers (stringers erected on temporary braces) according to the present invention.

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

Fig. 13 is a schematic view of the lifting of the pier (pier at the installation position).

Fig. 14 is a construction state diagram of a crane installed on an existing pier.

Fig. 15 is a schematic view of the pier of fig. 14.

Fig. 16 is a schematic view of a pier lifted from a longitudinal center to an installation position.

Fig. 17 is a schematic view of the hoisting of a prefabricated capping beam (the other end of the longitudinal beam is erected on an existing pier) in the present invention.

Fig. 18 is a state diagram of the present invention in lifting a prefabricated capping beam (rotating the prefabricated capping beam longitudinally to the lateral direction).

Detailed Description

The following describes embodiments of the present invention in detail with reference to the accompanying drawings, and the embodiments and specific operation procedures are given by the embodiments of the present invention under the premise of the technical solution of the present invention, but the scope of protection of the present invention is not limited to the following embodiments.

In the description of the present invention, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.

As shown in fig. 1, the lifting device for bridge construction according to the present invention includes a walking frame 10, a lifting mechanism 20, a first walking mechanism 30, a power mechanism, a bottom support structure 40, and a top support structure 50.

As can be seen in conjunction with fig. 1-2, the walking frame 10 includes a truss 101 disposed vertically and a carrying frame 102 disposed horizontally, the carrying frame 102 includes two longitudinal beams 102a (in a box beam structure) disposed at the top of the truss 101 at intervals, and a front connecting beam 102b and a rear connecting beam 102c connecting the longitudinal beams 102a together, the longitudinal beams 102a, the front connecting beam 102b and the rear connecting beam 102c enclose a closed frame, and the longitudinal beams 102a provide a moving space for the walking trolley of the lifting mechanism 20;

the truss 101 comprises a pair of lower connecting beams 101a and a pair of vertical columns 101b fixedly connected to each lower connecting beam 101a, wherein a reinforcing diagonal brace 101d is arranged between one vertical column 101b and the lower connecting beam 101a, and the four vertical columns 101b are fixedly connected together through a connecting frame 202g frame 101 c;

the rear end part of the bearing frame 102 is fixed at the top of the truss 101, namely the walking frame 10 is of a large cantilever structure, the transverse occupied space is small, the walking is more flexible, and the flexible lifting requirements of prefabricated members such as piers, bridges and the like can be met.

In order to ensure that the transport vehicle can pass under the truss 101 during actual installation, only one connecting frame 202g frame 101c is installed on the upper part of each pair of the columns 101b which are transversely spaced, so that the transport vehicle can pass under the transverse connecting frame 202g frame 101 c.

As can be seen in connection with fig. 1 and 3-5, the first travel mechanism 30 has four sets of travel assemblies disposed below the truss 101. Specifically, a group of traveling assemblies is disposed at intervals on each lower connection beam 101 a. The specific structure is described by taking one group of walking components as an example: as can be seen from fig. 2, the traveling assembly comprises a frame beam 301 fixed to one end of the lower connecting beam 101a (the frame beam is longitudinally arranged), two mounting members 302 rotatably arranged on the frame beam 301, and at least two pairs of tire-type traveling wheels 303, wherein a swivel bearing 304 (with a bearing seat) is arranged at the upper part of the mounting members 302, and the upper part of a mounting shaft in the swivel bearing 304 is fixed on the frame beam 301; the connecting part at the upper part of the mounting piece 302 is fixed on the bearing seat of the slewing bearing 304 through bolts, and when the bearing seat is rotated by external force, the mounting piece 302 can be driven to synchronously rotate so as to meet the steering requirement.

In actual installation, two pairs of tire-type traveling wheels 303 may be installed on each frame beam 301, or three pairs, or even four pairs, of tire-type traveling wheels 303 may be installed, and the pair number of tire-type traveling wheels of the traveling assembly may be determined according to the load, and is not limited to two or three pairs.

Each walking component is provided with a power mechanism so as to meet the requirements of transverse walking, oblique walking, steering and longitudinal walking. Specifically, as can be seen in connection with fig. 5, the power mechanism has a first power source that drives the tire-type road wheel 303 to travel and a second power source that drives the tire-type road wheel 303 to rotate. The first power source is a second motor reducer (fixed on the mounting member 302) arranged between each pair of tyre-type travelling wheels 303, and the second motor reducer is in transmission connection with the wheel axle of each pair of tyre-type travelling wheels 303 (the wheel axle is in running fit with the mounting member 302). When the tire type travelling wheel 303 is driven to walk by the second motor speed reducers in operation, the plurality of second motor speed reducers are synchronously started, and then the transverse walking, the longitudinal walking and the oblique running of the lifting equipment are realized.

As can be seen in conjunction with fig. 3-5, the second power source includes a fifth cylinder 602 having one end fixed to the frame beam 301, the number of fifth cylinders 602 being identical to the number of mounts 302 for each traveling assembly (i.e., each pair of tire-type traveling wheels 303 is provided with a fifth 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 adjusting arm 604 is fixedly connected to each slewing bearing 304 of the walking assembly, and a piston rod 602b of the fifth oil cylinder 602 is hinged to one end of the second adjusting arm 604. When the piston rod 602b of the fifth cylinder 602 extends or retracts, the second adjusting arm 604 is forced to rotate the bearing seat and the mounting member 302 synchronously, so as to adjust the traveling direction of the tire-type traveling wheel 303.

In actual construction, the rotation angle of the tire-type travelling wheel 303 can be adjusted, so that the invention is converted from transverse travelling to longitudinal travelling or small-angle oblique travelling, and the like, and the lifting is more flexible.

In actual installation, according to load requirements, the number of tire-type travelling wheels 303 on the travelling assembly can be three, and correspondingly, the number of fifth cylinders 602 is also three, as shown in fig. 1. Of course, the tire-type travelling wheels 303 of the travelling assembly can also be four pairs or five pairs so as to meet the bearing requirement.

The working process of the power mechanism and the first travelling mechanism 30 in the invention is as follows: in the normal running state, the travelling frame 10 can longitudinally reciprocate: the second motor reducer works in the same direction at the same time, so that the tire-type travelling wheel 303 walks along the longitudinal direction; the second motor speed reducer changes direction at the same time, and the tire-type travelling wheel 303 returns to the original path; when the travelling frame needs to transversely move, the piston rods of the fifth oil cylinders 602 of the four groups of travelling assemblies simultaneously extend outwards, so that each pair of tyre-type travelling wheels 303 rotate by 90 degrees, and the travelling frame 10 can transversely advance or retreat by starting the second motor reducer; when the piston rod of the fifth oil cylinder 602 is retracted, the tire-type travelling wheel 303 is reset to a longitudinal travelling state by rotating by 90 degrees transversely; when tilting is needed, the fifth oil cylinder 602 is synchronously started, so that the piston rod of the fifth oil cylinder extends outwards for a certain length, each pair of tire-type travelling wheels 303 rotates by the same angle, and the travelling frame 10 can tilt by starting the second motor reducer.

The traveling mechanism and the first motive mechanism realize the mutual switching of the longitudinal traveling state and the transverse traveling state of the traveling frame 10, can also realize the random switching of the longitudinal traveling state and the oblique traveling state and the random switching between the transverse traveling state and the oblique traveling state, and can meet the rapid construction requirements of piers and bent caps at different positions.

As can be seen in connection with fig. 3 and 6, the bottom support structure 40 has support assemblies, at least one support assembly being provided on the frame rail 301 of each running assembly. The support assembly includes a fixed seat 401 fixed at the bottom of the frame beam 301, a sixth cylinder 402 disposed on the fixed seat 401, and a support base 403 driven to rise and fall by the sixth cylinder 402. When the vehicle is not walking, the piston rod of the sixth oil cylinder 402 extends outwards, and the supporting base 403 moves downwards to touch the ground, so that the load of the tyre-type walking wheel 303 is shared. During walking, the piston rod of the sixth oil cylinder 402 is retracted to enable the support base 403 to be higher than the road, so that normal walking, steering and the like of the invention are ensured.

As can be seen in fig. 1 and 7-9, the lifting mechanism 20 includes a trolley 201 and a lifting device 202 driven by the trolley 201 to lift, wherein the lifting device 202 is used for fixing prefabricated members (such as bridge piers, cap beams, etc.); the trolley 201 comprises a walking beam 201a, a second walking mechanism, a mounting seat 201b and a winch 201c; the walking beam 201a is transversely erected on the two longitudinal beams 102 a; the second traveling mechanism comprises traveling units arranged at the end part of the traveling cross beam 201a and third power sources for driving the traveling units to travel along the guide rail 102d on the longitudinal beam 102a, and the traveling units are divided into four groups so as to ensure stable traveling of the traveling cross beam 201 a; the number of the third power sources is consistent with that of the walking units, the walking units comprise mounting frames 201d which walk along the longitudinal beams 102a, two walking steel wheels 201e are arranged in the mounting frames 201d at intervals, guide rails 101d matched with the walking steel wheels 201e are arranged on the upper surface of the longitudinal beams 102a, and the guide rails 101d are arranged along the length direction of the longitudinal beams 102 a;

The third power source is a third motor reducer 201f fixed on the mounting frame 201d, and the third motor reducer 201f is in transmission connection with the wheel shaft of one of the walking steel wheels 201 e. When the trolley is in operation, the plurality of third motor speed reducers 201f work in the same direction at the same time, so that the four groups of travelling units travel in the same direction along the guide rails on the longitudinal beam 102a, and the trolley 201 horizontally reciprocates on the longitudinal beam 102 a.

The upper surface of walking crossbeam 201a is provided with a pair of slide rail 201g, and the direction of slide rail 201g and walking crossbeam 201a is unanimous, and the bottom of mount pad 201b is provided with two sets of slider that cooperatees with slide rail 201g, and then has realized the slidable mounting of mount pad 201b and walking crossbeam 201a to the position of adjustment hoist engine 201c satisfies the different hoisting demands of different prefabs.

The hoist 201c is fixed in the mounting seat 201b, a fixed pulley block 201h matched with a steel wire rope of the hoist 201c is arranged in a mounting groove in the mounting seat 201b, a movable pulley block 201i is arranged at a hoisting joint of the steel wire rope, a fixed frame 201j is arranged on the movable pulley block 201i, and the fixed pulleys of the fixed pulley block 201h and the movable pulleys of the movable pulley block 201i are in one-to-one correspondence up and down to provide traction guide for the steel wire rope of the hoist 201 c.

As can be seen from fig. 8, the walking 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 along the sliding rail 201g, so as to adjust the lateral position of the hoist 201 c.

The specific working process and principle of the lifting trolley 201 of the invention are as follows: at the time of lifting, the third motor reducer 201f drives the walking beam 201a to move longitudinally along the guide rail on the side member 102a to a specified position. Specifically, the third motor speed reducer 201f rotates anticlockwise synchronously, so that the walking steel wheel 201e at the bottom of the walking beam 201a moves leftwards along the guide rail, the third motor speed reducer 201f rotates clockwise synchronously, the walking steel wheel 201e moves rightwards along the guide rail, and the specific position of the walking beam 201a can be adjusted according to specific requirements; after the traveling beam 201a is in place, the lateral position of the hoist 201c is adjusted by the second cylinder 203. When the piston rod of the second oil cylinder 203 extends, the whole winch 201c moves along the direction a in fig. 3, and when the piston rod of the second oil cylinder 203 retracts, the whole winch 201c moves along the direction B in fig. 3, so that the adjustment of the transverse position of the winch 201c can be flexibly adjusted according to actual conditions, and the third motor reducer 201f is matched with the second oil cylinder 203, so that the adjustment of the longitudinal and transverse positions of the winch 201c is realized, and the requirements of different working conditions are met.

As can be seen in fig. 7 and 9, the spreader 202 includes a rotation mechanism having a first motor 202b provided on a fixed frame 201j, a driving gear 202c driven by the first motor 202b, and a driven gear 202d engaged with the driving gear 202c, a lifting hanger, a connection unit, a lifting auxiliary support structure, and a gradient adjustment mechanism;

the two first motors 202b are symmetrically arranged on the fixed frame 201j, a driving gear 202c is arranged on the motor shaft of each first motor 202b, a driven gear 202d is positioned below the fixed frame 201j and meshed with the two driving gears 202c, and the driving gears 202c and the driven gears 202d have a reduction ratio; the axle of the driven gear 202d is rotatably connected with the fixed frame 201j, so that the driven gear is ensured to rotate relative to the fixed frame.

The lifting frame has a stile 202e fixed to the axle of the driven gear 202d and a lifting beam 202f laterally disposed at the bottom of the stile 202 e. When the device works, if rotation is needed, the first motor 202b is started, the driving gear 202c of the first motor 202b is meshed with the driven gear 202d, rotation of the driven gear 202d is further achieved, the driven gear 202d drives the lifting frame to synchronously rotate through the wheel shaft of the driven gear 202d, rotation of the lifting frame is further achieved, and flexible rotation of the prefabricated member in the horizontal range can be achieved.

As can be seen in connection with fig. 7 and 9, the connection unit includes a pair of connection frames 202g (located at both front and rear sides of the lifting beam 202 f) fixed to each end of the lifting beam 202f, a connection bar 202h vertically provided on each connection frame 202g, and a connection member fixedly attached to the bottom of the connection bar 202 h. In actual installation, the connector is preferably fixed to the nut seat 202k at the bottom of the connecting rod 202h (i.e., a long screw), and the long screw can be used to connect with the prefabricated capping beam, so as to achieve the fixed connection between the prefabricated member and the hanger 202. In order to meet the hoisting requirement of the prefabricated pier, a hoisting ring is arranged on the bottom surface of the hoisting beam 202f and used for penetrating a hoisting rope so as to meet the requirement of the prefabricated pier.

As can be seen in conjunction with fig. 9, the auxiliary lifting support structure includes two pairs of auxiliary legs 202m disposed at the bottom of the lifting beam 202f, and each pair of auxiliary legs 202m are fixedly connected together by a cross bar 202n, so as to improve the structural stability of the auxiliary supporting structure.

As can be seen from fig. 9, the slope adjustment mechanism includes a third cylinder 202p and a fourth cylinder 202q, the third cylinder 202p is used for adjusting the transverse slope, the cylinder body of the third cylinder 202p is hinged at the middle upper portion of the mullion 202e, the lower portion of the mullion 202e is hinged with a first adjusting arm 202r (i.e. a pair of adjusting plates hinged at the lower portion of the mullion 202 e), the first adjusting arm 202r is located above the lifting beam 202f, and the piston rod of the third cylinder 202p is hinged with the end portion of the first adjusting arm 202 r. When the piston rod of the third cylinder 202p extends outwards, the first adjusting arm 202r is forced to rotate downwards, so that the C end of the lifting beam 202f is higher than the D end, and the C end of the lifting beam 202f is gradually lifted in the retracting process of the third cylinder 202p and the piston rod.

As can be seen from fig. 9, the cylinder body of the fourth cylinder 202q is hinged at the middle upper portion of the mullion 202e, the middle portion of the lifting beam 202f has a horizontal arm 202s perpendicular thereto, and the piston rod of the fourth cylinder 202q is hinged at the end of the horizontal arm 202 s. The fourth cylinder 202q can realize the adjustment of the gradient of the lifting beam 202f in the longitudinal direction.

As can be seen in fig. 1 and 10, the jack-up support structure 50 is disposed on the front connection beam 102b, and includes two telescopic legs 501 and a first cylinder 502 which are disposed at intervals, wherein an upper leg 501a of the telescopic leg 501 is fixed on the front connection beam 102b, and a lower leg 501b of the telescopic leg 501 is inserted into the upper leg 501 a; a pair of first oil cylinders 502 are arranged on the front connecting beams 102b on two sides of each telescopic supporting leg 501, a hinging seat 503 is hinged on the lower supporting leg 501b, a cylinder body of each first oil cylinder 502 is fixed on the front connecting beam 102b, and piston rods are respectively hinged at one end parts of the hinging seats 503. The jacking supporting structure 50 can be used for temporarily supporting the front end of the longitudinal beam 102a under the cantilever lifting working condition, can be supported on the top of an installed pier or a temporary bracket during actual construction, and ensures that the longitudinal beam 102a is in a horizontal state. In addition, the two first cylinders 502 of each telescopic supporting leg 501 can be synchronously telescopic, so that the telescopic supporting legs 501 can be adjusted in the height direction, and further the supporting requirements of the telescopic supporting legs at different heights can be met.

As can be seen in conjunction with fig. 10, the lower bottom beams 504 of the two lower legs 501b are connected together to further increase the structural strength and stability of the overhead support structure 50.

The invention also provides a bridge construction method, which adopts the lifting equipment for bridge construction in the embodiment of the invention, and specifically comprises the following steps:

s1, construction operation of a first group of piers

In practical construction, two piers are usually used to support the capping beam, so that two piers need to be installed before the capping beam is installed. The construction methods of the two piers are the same, and taking one of them as an example:

s11, installing a temporary support 70 near the pier design installation position, wherein the height of the temporary support 70 is higher than that of the prefabricated pier; the telescopic support legs 501 are synchronously adjusted by using the first oil cylinders 502, so that the jacking supporting structure 50 is supported on the installed temporary support, and the longitudinal beam 102a is ensured to be in a horizontal state; each bottom supporting structure 40 is adjusted to enable each supporting base 403 to touch the ground, so that the load of the tire-type travelling wheel 303 is shared, as shown in fig. 11;

s12, passing a transport vehicle from below the truss 101, and using the transport vehicle to drive the lower part of the prefabricated bridge pier longitudinal beam 102 a; the third motor reducer 201f is utilized to enable the lifting trolley 201 to move to the position above the prefabricated bridge pier; finely adjusting a winch 201c by using a second oil cylinder 203 so that a lifting beam 202f is positioned right above the prefabricated bridge pier;

S13, connecting the lifting beam 202f and the prefabricated bridge pier together by adopting a binding method, and lifting the prefabricated bridge pier upwards by a certain height by using a winch 201c to separate the prefabricated bridge pier from a transport vehicle, wherein the method is shown in FIG. 11; the transport vehicle returns to the prefabricated field;

s14, hoisting the prefabricated bridge pier to the ground after the transport vehicle is driven away, and connecting the upper part of the prefabricated bridge pier with the hoisting beam 202f by using a hoisting rope; then, the third motor reducer 201f is started, so that the lifting mechanism 20 moves from left to right along the guide rail on the longitudinal beam 102a, and lifts the prefabricated pier while moving right, and the prefabricated pier lifts from a horizontal state to a vertical state by taking the bottom of the prefabricated pier as a fulcrum, as shown in fig. 12;

s15, lifting the prefabricated bridge pier by using a winch 201c, enabling the bottom of the prefabricated bridge pier to be separated from the ground, and enabling the prefabricated bridge pier to move to a designed position by using the first power mechanism and the first travelling mechanism 30 to integrally move;

the position of the lifting appliance 202 is finely adjusted by utilizing a third motor reducer 201f and a second oil cylinder 203, so that the center of the prefabricated pier is overlapped with the center of the design position, and the concrete is shown in fig. 13; fixedly mounting the lifted precast pier at a designed position, and then connecting sleeve steel bars and grouting according to a conventional process to finish the mounting of the precast pier;

After the construction of the prefabricated pier is completed, the jacking supporting structure 50 and the supporting base 403 are retracted, the lifting equipment is transversely moved for a certain distance by utilizing the travelling mechanism and the first power mechanism, and then the steps S12-S15 are repeated, so that the construction operation of the other prefabricated pier is completed;

s2, construction operation of prefabricated capping beams on the first group of prefabricated piers

S21, synchronously adjusting the telescopic support legs 501 by using the first oil cylinders 502 to enable the jacking supporting structure 50 to be supported on the installed temporary support, so as to ensure that the longitudinal beam 102a is in a horizontal state; adjusting each bottom support structure 40 to enable each support base 403 to touch the ground, so as to share the load of the tire-type travelling wheel 303;

s22, a transport vehicle passes through the lower part of the truss 101, the transport vehicle is used for transporting the prefabricated capping beam to the lower part of the longitudinal beam 102a, and the third motor reducer 201f is used for moving the trolley 201 to the upper part of the prefabricated capping beam; finely adjusting the winch 201c by using a second oil cylinder 203 so that the lifting beam 202f is positioned right above the prefabricated cover beam;

s23, connecting the lifting beam 202f and the prefabricated capping beam together by using a long screw rod, and lifting the lifting beam and the prefabricated capping beam upwards by a certain height by using a winch 201c to separate the lifting beam from a transport vehicle, wherein the lifting beam and the prefabricated capping beam can be seen in FIG. 17 (the bridge pier in FIG. 17 is replaced by a temporary bracket);

s24, continuously lifting the prefabricated capping beam upwards by using a winch 201c to enable the bottom of the prefabricated capping beam to be higher than the installed pier; starting the first motor 202b, wherein the first motor 202b drives the lifting beam 202f to horizontally rotate by 90 degrees through the driven gear 202 d; the positions of the lifting appliance 202 and the prefabricated capping beam are adjusted by utilizing the third motor reducer 201f and the second oil cylinder 203, so that the center line of the prefabricated capping beam is centered with the installed first group of bridge piers, and reference can be made to fig. 18 (only by replacing the bridge piers in fig. 18 with temporary brackets); placing the prefabricated capping beam on the installed pier stud, connecting sleeve steel bars according to a conventional process, and grouting to complete the installation of the prefabricated capping beam;

S3, after the construction of the first prefabricated bent cap is completed, the jacking supporting structure 50 and the supporting base 403 are retracted, and the hoisting equipment is transversely moved for a certain distance by utilizing the travelling mechanism and the first power mechanism;

supporting the jacking supporting structure 50 of the lifting equipment on the installed pier stud, repeating the steps S12-S15, and completing the construction operation of the second group of piers, wherein the specific construction process is shown in figures 14-16;

for a large-span bridge, because the distance between the bridge piers is larger, the N group bridge piers can not provide support for the longitudinal beam 102a when the N+1 group bridge piers are installed in the construction process, and the temporary support can be used for supporting;

s4, repeating the step S2, hoisting a second prefabricated capping beam to a second group of installed piers, connecting sleeve steel bars and grouting according to a conventional process, and completing the installation of the prefabricated capping beam, wherein the specific construction process is shown in figures 17-18;

and (3) repeating the steps (S3) and (S4) to finish the construction operation of a plurality of groups of prefabricated piers and prefabricated capping beams.

It should be emphasized that the above description is merely a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, but may be modified without inventive effort or equivalent substitution of some of the technical features described in the above embodiments by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. Lifting equipment for bridge construction, its characterized in that: comprising

The walking frame is provided with a truss arranged vertically and a bearing frame arranged horizontally, and the bearing frame is provided with a pair of longitudinal beams fixedly connected to the top of the truss;

the lifting mechanism is provided with a trolley walking along the two longitudinal beams and a lifting appliance driven by the trolley to lift;

the first travelling mechanism is provided with a plurality of groups of travelling assemblies arranged below the truss, each travelling assembly is provided with a frame beam fixed at the bottom of the truss, at least two mounting pieces hinged to the frame beam and at least two pairs of tire-type travelling wheels, and each mounting piece is provided with a pair of tire-type travelling wheels;

the power mechanisms are a plurality of and correspond to the walking components one by one, and each walking component is provided with a power mechanism on a frame beam, and each power mechanism is provided with a first power source for driving the tire-type walking wheel to walk and a second power source for driving the tire-type walking wheel to rotate;

the bottom supporting structure is provided with a plurality of groups of supporting components which are respectively arranged on the frame beams of the walking components; and

and the jacking supporting structure is arranged at the cantilever end of the bearing frame.

2. The hoisting apparatus for bridge construction according to claim 1, wherein: the bearing frame further comprises a front connecting beam for connecting the two longitudinal beams together, the jacking supporting structure is arranged on the front connecting beam and comprises at least two telescopic supporting legs arranged at intervals and a first oil cylinder for driving the lower supporting legs of the telescopic supporting legs to lift, the upper supporting legs of the telescopic supporting legs are fixed on the front connecting beam, and at least two lower supporting legs are connected together through a bottom cross beam.

3. The hoisting apparatus for bridge construction according to claim 2, wherein: the two sides of each lower supporting leg are respectively provided with a first oil cylinder, the upper part of each lower supporting leg is hinged with a hinge seat, the cylinder body of each first oil cylinder is fixed on the front connecting beam, and the piston rod of each first oil cylinder is connected with the hinge seat.

4. The hoisting apparatus for bridge construction according to claim 1, wherein: the lifting trolley comprises a walking beam, a second walking mechanism, a mounting seat and a winch;

the walking cross beam is transversely erected on the two longitudinal beams;

the second travelling mechanism comprises travelling units arranged at two ends of the travelling cross beam and a third power source for driving the travelling units to travel along the guide rail on the longitudinal beam, and the travelling units comprise at least two travelling wheels which move along the guide rail;

The installation seat is arranged on the top surface of the walking beam in a sliding way, the winch is fixed on the installation seat, and a fixed pulley block matched with a steel wire rope of the winch is arranged in an installation groove of the installation seat.

5. The hoisting apparatus for bridge construction according to claim 4, wherein: the walking beam is provided with a second oil cylinder, the bottom of the mounting seat is provided with a sliding block, the walking beam is provided with a sliding rail matched with the sliding block, and the second oil cylinder drives the mounting seat to transversely reciprocate along the sliding rail.

6. The hoisting apparatus for bridge construction according to claim 1, wherein: the lifting appliance comprises a fixed frame and a movable pulley block arranged in the fixed frame; and also comprises

The rotating mechanism is provided with a first motor, a driving gear driven by the first motor and a driven gear meshed with the driving gear, and the driven gear is positioned below the fixed frame;

the lifting frame is provided with a vertical frame fixed on the driven gear and a lifting beam transversely arranged at the bottom of the vertical frame;

the connecting unit is provided with a pair of connecting frames fixed at each end part of the lifting beam, connecting rods vertically arranged on each connecting frame and connecting pieces fixedly connected to the bottoms of the connecting rods.

7. The hoisting apparatus for bridge construction according to claim 6, wherein: the lifting appliance further comprises a lifting auxiliary supporting structure arranged at the lower part of the lifting beam and a gradient adjusting mechanism for adjusting the gradient of the lifting beam, wherein the gradient adjusting mechanism comprises a third oil cylinder and a fourth oil cylinder which are obliquely arranged, the cylinder bodies of the third oil cylinder and the fourth oil cylinder are hinged at the middle upper part of the vertical frame, a piston rod of the third oil cylinder is hinged with a first adjusting arm which is obliquely arranged, and the other end of the first adjusting arm is hinged at the lower part of the vertical frame; the middle part of the lifting beam is vertically provided with a horizontal arm, and a piston rod of the fourth oil cylinder is hinged to the end part of the horizontal arm.

8. The hoisting apparatus for bridge construction according to claim 1, wherein: the upper part of the mounting piece is rotationally connected with the frame beam through a slewing bearing; the first power source is a second motor speed reducer arranged between each pair of tire-type travelling wheels and is in transmission connection with the tire-type travelling wheels;

the number of the second power sources is consistent with that of the mounting pieces, the second power sources comprise a fifth oil cylinder, one end of the fifth oil cylinder is 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 hinged with a second adjusting arm arranged on a bearing seat of the slewing bearing.

9. The hoisting apparatus for bridge construction according to claim 1, wherein: the support assembly comprises a fixed seat fixed at the bottom of the frame beam, a sixth oil cylinder arranged on the fixed seat and a support base driven by the sixth oil cylinder to lift.

10. A bridge construction method is characterized in that: the bridge construction hoisting device according to any one of claims 1 to 9, comprising the steps of:

s1, construction operation of a first group of piers

S11, installing a temporary support near the pier design installation position, wherein the height of the temporary support is higher than that of the prefabricated pier; the height of the jacking supporting structure is adjusted to enable the jacking supporting structure to be supported on the temporary support, and the longitudinal beam is ensured to be in a horizontal state; each bottom supporting structure is adjusted to enable each supporting base to touch the ground, so that the load of the tire-type travelling wheel is shared;

s12, passing a transport vehicle from the lower part of the truss, and transporting the prefabricated bridge pier to the lower part of the longitudinal beam by using the transport vehicle; the position of the lifting appliance is adjusted, so that the lifting beam of the lifting appliance is positioned right above the prefabricated bridge pier;

s13, connecting the lifting beam and the prefabricated bridge pier together by adopting a binding method, lifting the lifting trolley upwards by a certain height to separate the prefabricated bridge pier from the transport vehicle, and returning the transport vehicle to the prefabricated field;

S14, after the transport vehicle is driven off, placing the prefabricated bridge pier on the ground, and connecting the upper part of the prefabricated bridge pier with a lifting appliance by using a lifting rope; lifting one end of the prefabricated pier by using a lifting trolley to enable the end of the prefabricated pier to be lifted to a vertical state from a horizontal state by taking the bottom as a fulcrum;

s15, lifting the prefabricated bridge pier by using a lifting trolley, lifting the bottom of the prefabricated bridge pier to separate from the ground, and moving the prefabricated bridge pier to a designed position by using the first power mechanism and the travelling mechanism to integrally move;

the position of a lifting appliance is adjusted by using a lifting trolley, so that the center of a precast pier is overlapped with the center of a design position, the precast pier lifted in place is fixedly arranged at the design position, and then sleeve steel bars and grouting are connected according to a conventional process, so that the installation of the precast pier is completed;

after the construction of the prefabricated pier is completed, the jacking supporting structure and the supporting base are retracted, the lifting equipment is transversely moved for a certain distance by utilizing the travelling mechanism and the first power mechanism, and the S12-S15 are repeated, so that the construction operation of the other prefabricated pier is completed;

s2, construction operation of prefabricated capping beams on the first group of prefabricated piers

S21, a step S11;

s22, passing a transport vehicle from below the truss, and transporting the prefabricated capping beam to the position below the longitudinal beam by using the transport vehicle; the position of the lifting appliance is adjusted to enable the lifting beam to be positioned right above the prefabricated cover beam;

S23, connecting a lifting beam of the lifting appliance with a prefabricated cover beam by using a long screw rod, and lifting the lifting beam to a certain height by using a trolley to separate from a transport vehicle, wherein the transport vehicle returns to a prefabricated field;

s24, continuously lifting the prefabricated capping beam upwards by using the lifting trolley to enable the bottom of the prefabricated capping beam to be higher than the installed bridge pier; the lifting beam of the lifting appliance is adjusted to be transverse from the longitudinal direction, so that the prefabricated cover beam horizontally rotates by 90 degrees;

the positions of the lifting appliance and the prefabricated capping beam are adjusted to enable the central line of the prefabricated capping beam to be centered with the installed first group of piers, then the prefabricated capping beam is placed on the installed pier stud, sleeve steel bars are connected and grouting is carried out according to the conventional process, and the installation of the prefabricated capping beam is completed;

s3, after the construction of the first prefabricated bent cap is completed, the jacking supporting structure and the supporting base are retracted, and the hoisting equipment is longitudinally moved for a certain distance by utilizing the travelling mechanism and the first power mechanism;

supporting the jacking supporting structure of the lifting equipment on the installed pier column, repeating the steps S12-S15, and completing construction operation of the second group of pier;

s4, repeating the step S2, hoisting a second prefabricated capping beam to a second group of installed piers, connecting sleeve steel bars according to a conventional process, and grouting to complete the installation of the prefabricated capping beam;

And (3) repeating the steps (S3) and (S4) to finish the construction operation of a plurality of groups of prefabricated piers and prefabricated capping beams.