CN218116175U

CN218116175U - Hydraulic auxiliary device of jack for pushing turnout continuous steel box girder

Info

Publication number: CN218116175U
Application number: CN202222368741.8U
Authority: CN
Inventors: 金国海; 方美平; 林宁; 沈敏; 李晓龙; 苏显莲; 罗国毅; 毛国强; 黄卿; 毛玲康; 马寅; 杨湘军; 马留军; 岳义强; 谢龙; 王小军; 汪跃军
Original assignee: Hangzhou Local Railway Development Co ltd; Zhejiang University of Science and Technology ZUST; China Railway 24th Bureau Group Co Ltd; China Railway 24th Bureau Group Zhejiang Engineering Testing Co Ltd
Current assignee: Hangzhou Local Railway Development Co ltd; Zhejiang University of Science and Technology ZUST; China Railway 24th Bureau Group Co Ltd; China Railway 24th Bureau Group Zhejiang Engineering Testing Co Ltd
Priority date: 2022-09-06
Filing date: 2022-09-06
Publication date: 2022-12-23
Anticipated expiration: 2032-09-06

Abstract

The utility model discloses a hydraulic auxiliary device of a jack for pushing a turnout continuous steel box girder, which comprises a plurality of foundation plates and slide rails, wherein the foundation plates extend along the width direction of a railway; the bottom plate of the turnout continuous steel box girder is in sliding fit on the sliding rail through a sliding block; a reaction frame and a jack are fixed on the foundation plate at the rear end of the slide rail; a plurality of cushion block units are arranged in front of the jack; each cushion block unit comprises a round steel pipe, a front concrete sliding plate and a rear concrete sliding plate, wherein the front concrete sliding plate and the rear concrete sliding plate support and fix the round steel pipe; each concrete sliding plate is in sliding fit in the sliding rail, and two positioning oil cylinders are arranged on two sides of each concrete sliding plate; a piston rod of the jack abuts against the rear end of the round steel tube of the last cushion block unit; the end parts of the round steel tubes of the adjacent cushion block units are mutually abutted; a spherical top head is fixed at the front end of the round steel tube of the foremost cushion block unit, and a pressure-bearing seat is welded on a side web plate on the stressed side of the turnout continuous steel box girder; the spherical top head is abutted against the spherical concave pit of the bearing seat. The device is light and firm, and the process of transmission thrust is stable high-efficient.

Description

Hydraulic auxiliary device of jack for pushing turnout continuous steel box girder

Technical Field

The utility model relates to an overhead railway bridge moves roof beam and trades roof beam construction technical field, specifically says so a fluid pressure type auxiliary device that is used for transversely advancing the jack to railway circuit neutral line position with 2 prefabricated lines become the continuous steel case roof beams in switch of 4 lines.

Background

Along with the rapid development of urban railways which promote local economy and facilitate the trip of people, stations are often required to be additionally arranged in the multi-line section of the existing elevated railway, the railway is changed from 2 lines to 4 lines, and a new continuous steel box girder of a switch in a throat area is arranged; the original simply supported reinforced concrete T beam for supporting the double-track railway needs to be transversely pulled and moved out, meanwhile, the prefabricated turnout continuous steel box beam for changing the railway from 2 tracks to 4 tracks is transversely pushed to the central line position of the existing railway line, and the processes of moving out the old beam and pushing in the new beam need to be completed as soon as possible so as to meet the requirement that the railway line recovers to operate and traffic within 10 hours. Of course, the present application relates to a process of pushing in a new beam, that is, a 2-line to 4-line turnout continuous steel box beam or steel box beam, and the specific construction process is as follows.

The method comprises the following steps of firstly carrying out pre-construction before pushing, namely piling on the ground, pouring a concrete bearing platform on the pile top, and then constructing a plurality of stand columns on the bearing platform, wherein every four stand columns distributed at four corners are a group, and an inclined strut and a transverse connecting beam for reinforcement are arranged between every two stand columns; placing and fixing a longitudinal main beam on the top end of each upright column, and placing and fixing a transverse main beam on each longitudinal main beam, wherein the longitudinal direction refers to the length direction of the railway, and the transverse direction refers to the width direction of the railway, and the pile foundation, the bearing platform, the upright columns, the longitudinal main beams and the transverse main beams jointly form a sliding support for pushing the box girder; then, constructing and fixing a foundation plate parallel to each transverse main beam of the sliding support, and fixing a sliding rail on the foundation plate; and then, erecting a new beam, namely a turnout continuous steel box beam, at the top end of the sliding support, arranging sliding blocks in each sliding rail in a sliding mode, and placing and fixing the bottom end of the new beam on the sliding blocks, so that the preposed preparation work is completed. Then, people fix a reaction frame on a foundation plate at the outer end of each slide rail and install a jack, and push the new beam inwards by using the jack, but because the jacking distance of the jack is far less than the distance between the initial position of the new beam and the neutral line position of the railway line, the mode that an auxiliary cushion block is continuously added in front of a piston rod of the jack can be adopted, namely, the piston rod is retracted after the jack is pushed to the upper limit, an auxiliary cushion block is added in front of the piston rod, the jack is driven to push the auxiliary cushion block again, the jack is retracted again after the jack is pushed to the upper limit, an auxiliary cushion block is added again, the jack is pushed to the upper limit 8230, 82308230is carried out, and the steps are repeated until the new beam is pushed to the neutral line position of the railway line.

The pushing auxiliary cushion block in the prior art is simple and crude in structure, is generally a concrete cushion block or a steel cushion block cast on site, and is found to be heavy in actual construction, so that the concrete cushion block is very laborious to carry to the front of a piston rod or remove; if steel cushion blocks such as steel pipes are adopted, the stress axes of the steel pipes are difficult to control on the same straight line when the pushing lengthening is carried out; in addition, the intermediate medium for transmitting the thrust is not stable enough, each cushion block is easy to jump up or transversely skew under the action of load, the effect of transmitting the thrust to the steel box girder is not good, the cushion blocks are easy to deviate and slip, and the thrust is difficult to be vertically and stably completely applied to the side part of the steel box girder.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a light firm, the stable efficient in process of transmission thrust is used for advancing the fluid pressure type auxiliary device of the jack of the continuous steel case roof beam of switch.

The technical solution of the utility model is to provide a hydraulic auxiliary device for a jack used for pushing a turnout continuous steel box girder, which comprises a plurality of foundation plates extending along the width direction of a railway, and a slide rail is fixed on each foundation plate; a plurality of sliding blocks are fixed on the bottom plate of the turnout continuous steel box girder, and each sliding block is in sliding fit with a corresponding sliding rail; a reaction frame is fixed on the foundation plate at the rear end of the slide rail, and a jack is installed on the reaction frame; a row of a plurality of cushion block units are arranged in front of a piston rod of the jack; each cushion block unit comprises a round steel pipe for transmitting the jacking force, a front concrete sliding plate and a rear concrete sliding plate for supporting and fixing the round steel pipe, wherein the front side and the rear side of the round steel pipe respectively penetrate through the central holes of the front concrete sliding plate and the rear concrete sliding plate; each concrete sliding plate is in sliding fit in the sliding rail, and two positioning oil cylinders which extend outwards and are arranged on two sides of each concrete sliding plate; a piston rod of the jack abuts against the rear end of the round steel tube of the last cushion block unit; the end parts of the round steel tubes of the adjacent cushion block units are mutually abutted; a spherical top head is fixed at the front end of the round steel pipe of the foremost cushion block unit, and a pressure-bearing seat with a spherical pit corresponding to the spherical top head is welded on a side web plate at the stress side of the turnout continuous steel box girder; the spherical top head is propped against the spherical concave pit of the corresponding bearing seat.

Compared with the prior art, the hydraulic auxiliary device of the jack for pushing the turnout continuous steel box girder has the following advantages.

Firstly, each cushion block unit is composed of a round steel pipe and a front concrete sliding plate and a rear concrete sliding plate, the two concrete sliding plates can cushion the round steel pipe to be high enough, so that the height requirement that the round steel pipe abuts against a side web plate on the stress side of a steel box girder is met, although the height of a single concrete sliding plate can be increased, instability is easy to occur, the front concrete sliding plate and the rear concrete sliding plate are supported and fixed on the front part and the rear part of the same round steel pipe together, the whole structure is very firm and stable, and the concrete sliding plates can be prevented from falling; the circular steel tube for transmitting the top thrust is hollow, light and high in strength, can bear the load of the top thrust and can greatly reduce the weight of the whole cushion block unit; in order to meet the height requirement of the side web plate abutting against the stress side of the steel box girder and avoid the overturning instability of the side web plate, the full-concrete cushion block needs to be arranged to be high and thick, so that the dead weight of the full-concrete cushion block is large, the dismounting and carrying are both hard, and the sliding resistance is also large; moreover, two sides of each concrete sliding plate are provided with two positioning oil cylinders extending towards two sides, and the two positioning oil cylinders respectively and tightly support two side walls of the sliding rail outwards, so that each concrete sliding plate is limited on the center line of the sliding rail, namely, each round steel pipe is ensured to transmit the jacking force of the jack along the same straight line without left-right deviation; certainly, the self weight of the front and rear concrete sliding plates effectively avoids the individual cushion block units from jumping upwards under stress, namely the jacking force is ensured to be transmitted linearly without vertical deviation; moreover, the design that the spherical top head of the first cushion block unit is mutually abutted with the spherical concave pits of the side web bearing seat on the stress side of the steel box girder ensures that the jacking force vertically acts on the side web on the stress side of the steel box girder, does not skew and skid, has good thrust transmission effect, and can ensure that the jacking force is balanced and stable and acts on the side part of the steel box girder to the maximum extent.

Preferably, the slide rail is a channel steel with an upward opening; the bottom plates of the front concrete sliding plate, the rear concrete sliding plate and the sliding block are all fixed with lubricating layers; therefore, the slide rail can ensure that the front concrete slide plate, the rear concrete slide plate and the slide block slide along a set straight line, namely each cushion block unit strictly transmits the jacking force in the direction vertical to the railway, thereby ensuring that the movement of the cushion block units is smoother and more stable; and the front concrete sliding plate, the rear concrete sliding plate and the lubricating layer of the bottom plate of the sliding block reduce the resistance of the cushion block unit and the steel box girder to the transverse movement on the sliding rail to the maximum extent, so that the transverse movement process is smoother and smoother.

The connection structure of each concrete sliding plate and the sleeved round steel tube is preferably that the front concrete sliding plate or the rear concrete sliding plate is provided with a threaded hole which runs through from the side surface to the central hole, and a fastening bolt is screwed in each threaded hole and tightly supports the corresponding round steel tube; therefore, the circular steel tube and the front and rear concrete sliding plates are quickly and conveniently disassembled and assembled, the circular steel tube is sleeved in the central hole and the fastening bolt is screwed tightly to abut against the central hole, the circular steel tube and the concrete sliding plates after being assembled are firm in connection effect, and the formed cushion block unit is strong in integrity.

Preferably, the inner surfaces of the two side walls of each slide rail are respectively provided with a guide groove with a C-shaped section, and the C-shaped guide groove extends along the length direction of the slide rail; a C-shaped jacking block is fixed on a piston rod of each positioning oil cylinder, the contour of each C-shaped jacking block is matched with the contour of the guide groove on the same side of the slide rail, and a lubricating layer is also arranged on the contact surface of each C-shaped jacking block and the convex rib of the guide groove; like this, after the piston rod of two positioning oil cylinders pushes up outward, the protruding muscle in the same one side lateral wall guide way of four direction chucking slide rails about can following about, C shape kicking block, its spacing effect is more ideal, the removal of four directions about having injectd about simultaneously, ensure that each cushion unit slides to around promptly along unique direction, the stability of the load of the transmission jacking force of sliding has further been promoted, and the lubricating layer of the contact surface of the protruding muscle of C shape kicking block and guide way, then further reduced the resistance of front and back to the removal, the process that makes each cushion unit circular steel pipe pass power forward is more smooth-going stable, further stop each cushion unit and jump on or crooked.

Preferably, the top of each concrete sliding plate is provided with a hydraulic station, two sides of the hydraulic station are provided with two oil pipes, the middle section of each oil pipe is embedded in the corresponding concrete sliding plate, and each oil pipe is communicated with the positioning oil cylinder on the same side of the corresponding concrete sliding plate; therefore, the wiring of oil pipes is reasonable and clear, and the oil pipes are stored in each concrete sliding plate, otherwise, an external non-movable large hydraulic station can only be selected, dozens of oil pipes are used for supplying oil to positioning oil cylinders of different concrete sliding plates, and the arrangement of the oil pipes is disordered and even entangled and stirred, so that the forward and backward sliding of the concrete sliding plates can be prevented; the application has the advantages that the embarrassment of messy lines of a common large-scale hydraulic station is avoided by arranging the independent micro hydraulic station and the independent pipeline on each concrete sliding plate; moreover, from the economic perspective, although the cost is increased by arranging the hydraulic station on each concrete sliding plate, the round steel pipes of each cushion block can be accurately and firmly limited on the forward and backward pushing routes, so that the time for welding and leveling the steel truss is saved, the workload of field welding operation is obviously reduced, the working hours for moving the railway beam and changing the railway beam are accelerated, the railway beam-moving operation is promoted to be recovered as early as possible, the time cost is greatly saved, moreover, the concrete sliding plate can be repeatedly recycled, the increased manufacturing cost of the oil pressure system is not high when the concrete sliding plate is used every time, the time cost is greatly saved, the concrete sliding plate is particularly suitable for the working condition with a shorter construction period, and the economic benefit is comprehensively considered and steadily.

The butt joint structure of the last cushion block unit and the jack is preferred, the rear end of the round steel pipe of the last cushion block unit is provided with an end plate, a rear cross-shaped rib plate for supporting the end plate is welded on the side wall of the rear side of the round steel pipe, and a piston rod of the jack abuts against the end plate at the rear end of the round steel pipe of the last cushion block unit; therefore, the contact part of the rear end of the last cushion block unit and the front end of the piston rod is small in contact area, so that the strength and the rigidity are not enough, and the load cannot be completely supported, and therefore the M-shaped rib plate is specially distributed to strengthen and reinforce the contact part to the maximum extent.

A rubber cushion plate is arranged between every two adjacent cushion block units, rubber plugs are arranged at the front end and the rear end of the rubber cushion plate, the rubber plugs at the front end and the rear end of the rubber cushion plate are respectively clamped into the rear opening of the front round steel pipe and the front opening of the rear round steel pipe, and the rubber cushion plate is tightly propped against the rear opening of the front round steel pipe and the front opening of the rear round steel pipe; like this, two rubber plugs that insert round steel tube around respectively can ensure that two round steel tubes aim at each other, ensure the accurate transmission of jacking force along sharp, and two round steel tube direct rigid contact around the rubber backing plate placed in the middle has then been avoided, reduce the wearing and tearing of round steel tube terminal surface.

The front end structure of the foremost cushion block unit is preferably that a steel plug is sleeved at the front opening of the circular steel tube of the foremost cushion block unit, a steel base plate is arranged at the front end of the steel plug, the spherical top head is welded on the steel base plate, and a front cross rib plate for supporting the steel plug is welded on the side wall of the front side of the circular steel tube; therefore, the connecting part of the foremost round steel pipe and the spherical top is reinforced in a targeted manner, so that the pushing force can be more stably and vertically transmitted to the side web plate on the stress side of the steel box girder.

Drawings

Figure 1 is the overall structure schematic diagram of the utility model used for pushing the hydraulic auxiliary device of the jack of the continuous steel box girder of the turnout during construction.

Fig. 2 is the structure schematic diagram of the hydraulic auxiliary device of the jack for pushing the turnout continuous steel box girder.

Fig. 3 is a schematic structural view of the utility model used for remove the foundatin plate and the slide rail of the hydraulic auxiliary device of the jack of the continuous steel box girder of the lapse switch.

Fig. 4 is the structural schematic diagram after the slide rail back end of the hydraulic auxiliary device of the jack for pushing the continuous steel box girder of the turnout is cut open.

Fig. 5 is a schematic structural view of the hydraulic auxiliary device of the jack for pushing the turnout continuous steel box girder, wherein each round steel tube is cut open laterally.

Fig. 6 is an enlarged structural view of a portion a in fig. 3.

Fig. 7 is an enlarged structural view of a portion B in fig. 4.

The concrete structure comprises a foundation plate 1, a foundation plate 2, a sliding rail 3, a sliding block 4, a lubricating layer 5, a reaction frame 6, a jack 7, a round steel pipe 8, a front concrete sliding plate 9, a rear concrete sliding plate 10, a fastening bolt 11, a positioning oil cylinder 12, a guide groove 12.1, a straight groove 12.2, a convex rib 13, a C-shaped ejector block 14, a hydraulic station 15, an oil pipe 16, an end plate 17, a rear rib plate 18, a rubber cushion plate 19, a rubber plug 20, a spherical top head 21, a steel plug 22, a steel cushion plate 23, a front rib plate in a shape of Chinese character 'mi', 24, a spherical pit 25 and a pressure-bearing seat.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-7, the utility model discloses a fluid pressure type auxiliary device for advancing switch continuous steel box girder's jack, it includes many foundatin plate 1 to extending along the railway width, is fixed with slide rail 2 on every foundatin plate 1. Specifically, the embodiment includes six foundation plates 1, each foundation plate 1 is fixed on one transverse main beam of the sliding support, and the foundation plate 1 is parallel to the transverse main beam; a parallel slide rail 2 is fixed on each foundation plate 1, and each slide rail 2 is a channel steel with an upward opening.

A plurality of rows of sliding blocks 3 are fixed on the bottom plate of the turnout continuous steel box girder 15, for example, six rows of sliding blocks 3 are fixed on the bottom plate of the steel box girder 15 in the embodiment, and each row is provided with 2 sliding blocks 3; the bottom surface of each sliding block 3 is provided with a lubricating layer 4 made of polytetrafluoroethylene material with the thickness of 5 mm. Each slider 3 is a sliding fit on a corresponding slide rail 2. As known in the art, the lubricating layer 4 made of PTFE material can be adhered to the surface of a steel structure or a concrete structure by high-strength glue.

A reaction frame 5 is fixed on the foundation plate 1 at the rear end of each sliding rail 2, and a jack 6 is installed on the reaction frame 5; a row of a plurality of cushion block units which are continuously closed are arranged in front of a piston rod of the jack 6. Each cushion block unit comprises a round steel tube 7 for transmitting the jacking force, a front concrete sliding plate 8 and a rear concrete sliding plate 9 for supporting and fixing the round steel tube 7, and the front side and the rear side of the round steel tube 7 respectively penetrate through the central holes of the front concrete sliding plate 8 and the rear concrete sliding plate 9; specifically, the front concrete sliding plate 8 or the rear concrete sliding plate 9 is provided with threaded holes penetrating from the side surface to the central hole, each threaded hole is screwed with a fastening bolt 10, and the corresponding round steel tube 7 is abutted by the fastening bolt 10. The correspondence means that the fastening bolt 10 is screwed on a certain front concrete sliding plate 8 or rear concrete sliding plate 9, and the round steel tube 7 sleeved in the central hole of the front concrete sliding plate 8 or rear concrete sliding plate 9 is the corresponding round steel tube 7 of the fastening bolt 10.

The bottom plates of the front concrete sliding plate 8 and the rear concrete sliding plate 9 are both fixed with a lubricating layer 4 made of polytetrafluoroethylene materials with the thickness of 5 mm. The front concrete sliding plate 8 or the rear concrete sliding plate 9 is in sliding fit in the sliding rail 2, and two positioning oil cylinders 11 which extend outwards and are arranged on two sides of each concrete sliding plate; that is, the inner surfaces of the two side walls of each slide rail 2 are respectively provided with a guide groove 12 with a C-shaped cross section, more specifically, each slide rail 2 side wall is provided with a straight groove 12.1, the middle of the height of the bottom of each straight groove 12.1 is provided with a convex rib 12.2, the straight groove 12.1 and the convex rib 12.2 both extend along the length direction of the slide rail 2, and the straight groove 12.1 and the convex rib 12.2 form the guide groove 12 with the C-shaped cross section which also extends along the length direction of the slide rail 2. A C-shaped top block 13 is fixed on a piston rod of each positioning oil cylinder 11, the profiles of each C-shaped top block 13 and the C-shaped guide groove 12 on the same side of the slide rail 2 are mutually matched, and a lubricating layer 4 is also arranged on the contact surface of each C-shaped top block 13 and the convex rib 12.2 of the guide groove 12 on the same side; the piston rod of the positioning oil cylinder 11 extends outwards to enable the C-shaped top block 13 to clamp the convex rib 12.2 of the guide groove 12 on the same side of the slide rail 2 outwards.

The top of each concrete sliding plate is provided with a hydraulic station 14, two oil pipes 15 are arranged on two sides of the hydraulic station 14, the middle section of each oil pipe 15 is embedded in the corresponding concrete sliding plate, and each oil pipe 15 is communicated with the positioning oil cylinder 11 on the same side of the corresponding concrete sliding plate. Each oil pipe 15 includes an oil inlet hose and an oil outlet hose, which are respectively communicated with two oil ports of the positioning oil cylinder 11.

A piston rod of the jack 6 abuts against the rear end of the round steel tube 7 of the last cushion block unit; namely, the rear end of the last cushion block unit circular steel tube 7 is provided with an end plate 16, the side wall of the rear side of the last cushion block unit circular steel tube 7 is welded with a rear rib plate 17 which is shaped like a Chinese character 'mi' and is used for supporting the end plate 16, and a piston rod of the jack 6 abuts against the end plate 16 at the rear end of the last cushion block unit circular steel tube 7.

The ends of the round steel tubes 7 of the adjacent cushion block units are indirectly abutted against each other; be equipped with a rubber backing plate 18 between per two adjacent cushion units promptly, this rubber backing plate 18 all is equipped with rubber plug 19 around the end, and the rubber plug 19 of this rubber backing plate 18 front and back end card respectively goes into the back mouth of the back circular steel tube 7 of the place ahead and the front opening of back circular steel tube 7 and this rubber backing plate 18 is supported tightly by the back mouth of the circular steel tube 7 of the place ahead and the front opening of back circular steel tube 7. Of course, it is also possible to directly abut the front and rear circular steel tubes 7 without providing rubber pads, only to increase the wear.

The front end of the round steel tube 7 of the foremost cushion block unit is fixedly provided with a spherical top 20, namely, a steel plug 21 is sleeved at the front opening of the round steel tube 7 of the foremost cushion block unit, a steel base plate 22 is arranged at the front end of the steel plug 21, the spherical top 20 is welded on the steel base plate 22, and a front rib plate 23 which is shaped like a Chinese character 'mi' and used for supporting the steel plug 21 is welded on the side wall of the front side of the round steel tube 7 of the foremost cushion block unit. The bearing seats 25 with spherical concave pits 24 which are in one-to-one correspondence with the spherical top heads 20 are welded on the side web plate of the stressed side of the turnout continuous steel box girder 15; each spherical head 20 abuts against the spherical recess 24 of the corresponding pressure bearing seat 25.

Claims

1. A hydraulic auxiliary device of a jack for pushing a turnout continuous steel box girder comprises a plurality of foundation plates extending along the width direction of a railway, wherein a slide rail is fixed on each foundation plate; a plurality of sliding blocks are fixed on the bottom plate of the turnout continuous steel box girder, and each sliding block is in sliding fit with a corresponding sliding rail; a reaction frame is fixed on the foundation plate at the rear end of the slide rail, and a jack is installed on the reaction frame; a row of a plurality of cushion block units are arranged in front of a piston rod of the jack; the method is characterized in that: each cushion block unit comprises a round steel tube for transmitting the jacking force, a front concrete sliding plate and a rear concrete sliding plate for supporting and fixing the round steel tube, and the front side and the rear side of the round steel tube respectively penetrate through the central holes of the front concrete sliding plate and the rear concrete sliding plate; each concrete sliding plate is in sliding fit in the sliding rail, and two positioning oil cylinders which extend outwards and are arranged on two sides of each concrete sliding plate; a piston rod of the jack abuts against the rear end of the round steel tube of the last cushion block unit; the end parts of the round steel tubes of the adjacent cushion block units are mutually abutted; a spherical top is fixed at the front end of the round steel tube of the foremost cushion block unit, and a pressure bearing seat with a spherical pit corresponding to the spherical top is welded on a side web plate on the stressed side of the turnout continuous steel box girder; the spherical top head is propped against the spherical concave pit of the corresponding bearing seat.

2. The hydraulic auxiliary device for the jack for moving the turnout continuous steel box girder according to claim 1, which is characterized in that: the slide rail is a channel steel with an upward opening; and lubricating layers are fixed on the bottom plates of the front concrete sliding plate, the rear concrete sliding plate and the sliding block.

3. The hydraulic auxiliary device for the jack for moving the continuous steel box girder of turnout junction according to claim 1, characterized in that: and the front concrete sliding plate or the rear concrete sliding plate is provided with a threaded hole which is communicated to the central hole from the side surface, and a fastening bolt is screwed in each threaded hole and supports the corresponding round steel pipe tightly.

4. The hydraulic auxiliary device for the jack for moving the continuous steel box girder of turnout junction according to claim 1, characterized in that: the inner surfaces of the two side walls of each sliding rail are respectively provided with a guide groove with a C-shaped section, and the C-shaped guide grooves extend along the length direction of the sliding rail; a C-shaped ejecting block is fixed on a piston rod of each positioning oil cylinder, the outline of each C-shaped ejecting block is matched with the outline of the guide groove on the same side of the slide rail, and a lubricating layer is arranged on the contact surface of each C-shaped ejecting block and the convex rib of the guide groove.

5. The hydraulic auxiliary device for the jack for moving the turnout continuous steel box girder according to claim 4, wherein: the top of each concrete sliding plate is provided with a hydraulic station, two sides of the hydraulic station are provided with two oil pipes, the middle section of each oil pipe is embedded in the corresponding concrete sliding plate, and each oil pipe is communicated with the positioning oil cylinder on the same side of the corresponding concrete sliding plate.

6. The hydraulic auxiliary device for the jack for moving the continuous steel box girder of turnout junction according to claim 1, characterized in that: the rear end of the last cushion block unit circular steel tube is provided with an end plate, a rear cross rib plate for supporting the end plate is welded on the side wall of the rear side of the circular steel tube, and a piston rod of the jack abuts against the end plate at the rear end of the last cushion block unit circular steel tube.

7. The hydraulic auxiliary device for the jack for moving the turnout continuous steel box girder according to claim 1, which is characterized in that: be equipped with a rubber backing plate between per two adjacent cushion units, the front and back end of this rubber backing plate all is equipped with the rubber plug, and the rubber plug of this rubber backing plate front and back end is blocked into respectively the back mouth of the back of the place ahead circular steel tube and the front opening of rear circular steel tube and this rubber backing plate is supported tightly by the back mouth of the round steel tube in the place ahead and the front opening of rear circular steel tube.

8. The hydraulic auxiliary device for the jack for moving the continuous steel box girder of turnout junction according to claim 1, characterized in that: the front opening of the round steel pipe of the first cushion block unit is sleeved with a steel plug, the front end of the steel plug is provided with a steel base plate, the spherical top head is welded on the steel base plate, and the side wall of the front side of the round steel pipe is welded with a front rib plate shaped like a Chinese character 'mi' for supporting the steel plug.