A transverse moving system adjacent to an existing high-speed railway box girder

Abstract

The application provides a transverse moving system adjacent to a box girder of an existing high-speed railway, which comprises: a slide, two slide intervals of the slide are arranged below a box girder to be constructed and extend horizontally along the width direction of the box girder to be constructed to a side far away from the existing high-speed railway; a sliding shoe, the slide is provided with the sliding shoe for bearing the box girder to be constructed, and the sliding shoe is assembled to slide along the slide; a traction cable, one end of the traction cable is connected to a side of the slide close to the existing high-speed railway, and the other end of the traction cable is connected to a driving mechanism after penetrating through the sliding shoe to push the sliding shoe to move transversely along the slide. The method for transverse moving construction of a steel truss girder is assembled 15m away from the railway direction and at a pre-deviated design position, after the assembly is completed, the steel truss girder is moved to the design position by using the transverse moving construction, the operation safety of the existing railway is effectively ensured, the construction period is shortened, and the construction quality is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of beam erection construction, and particularly relates to a transverse moving system adjacent to an existing high-speed railway box girder. BACKGROUND

[0002] With the rapid development of the economy and society, more and more high-speed railways appear on the land of China, and more and more steel truss girder swivel bridges cross or are adjacent to the high-speed railways. In order to reduce the occupation of land, the distance between the bridges and the high-speed railways is relatively short, and especially for the bridges in the same direction as the high-speed railway lines, the length of the close distance to the high-speed railway lines is longer. When the bridges are constructed, the high-speed trains passing by will affect the construction process, and the proximity to the high-speed railway will also affect the safety of the high-speed trains. In the related art, when the steel box girder is constructed and installed, the equipment and personnel need to be assembled at the construction site, and the equipment and personnel will stay near the high-speed railway for a long time, which will be affected by the passing high-speed trains. The installation and construction efficiency of the steel box girder is low, and there is a great safety risk.

[0003] Therefore, it is necessary to provide an improved technical solution for the above-mentioned deficiencies in the prior art. SUMMARY

[0004] The present application aims to overcome the deficiencies in the prior art, and provides a transverse moving system adjacent to an existing high-speed railway box girder.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical solution:

[0006] A transverse moving system adjacent to an existing high-speed railway box girder, comprising:

[0007] Two slide rails are distributed below the box girder placing station and extend horizontally along the width direction of the box girder to the side away from the existing high-speed railway;

[0008] A slide shoe is arranged on the slide rail for bearing the box girder to be constructed, and the slide shoe is assembled along the slide rail;

[0009] A traction cable is connected at one end to the side of the slide rail close to the existing high-speed railway, and at the other end to the driving mechanism after passing through the slide shoe, so as to push the slide shoe to move transversely along the slide rail;

[0010] The end of the slide rail corresponding to the box girder placing station is inclined upward, so that the lower surface of the box girder to be constructed is higher than the upper surface of the box girder placing station after being placed.

[0011] Preferably, a plurality of steel pipe piles are arranged below the slide rail, and the steel pipe piles are uniformly distributed in the length direction of the slide rail,

[0012] The steel pipe pile is provided with a jacking part at the upper end, and the jacking part is used to lower the to-be-constructed box girder to the box girder placing station.

[0013] Preferably, the upper end of the jacking part is connected with a support short section through an upper flange, the lower end of the jacking part is connected with the steel pipe pile through a lower flange, a plurality of limiting columns are arranged between the upper flange and the lower flange, the two ends of the limiting column pass through the upper flange and the lower flange respectively, and the limiting column is screwed with a limiting nut which blocks the lower surface of the upper flange and the upper surface of the lower flange respectively.

[0014] Preferably, the two sliding ways are respectively arranged at the two ends of the to-be-constructed box girder, and the steel pipe pile is anchored on the corresponding pier through a traction rod.

[0015] Preferably, the sliding way comprises a plurality of short sections which are spliced with each other, and the adjacent two short sections are fixed through bolts.

[0016] The steel pipe pile of each sliding way is double-row, a I-shaped steel is arranged on the support short section of the corresponding two steel pipe piles, the upper surface of the I-shaped steel is provided with a U-shaped hinged seat corresponding to the sliding way, and a hinged hole corresponding to the U-shaped hinged seat is arranged in the lower part of the sliding way.

[0017] Preferably, the sliding shoe comprises two shoe parts which are hinged with each other, the lower surfaces of the two shoe parts are inclined surfaces corresponding to the sliding way, and a through hole corresponding to the traction cable is arranged in the middle part of the two shoe parts.

[0018] The driving mechanism is a continuous jack, and the through hole is a waist-shaped hole which extends in the longitudinal direction.

[0019] Preferably, the shoe part has a flat surface which extends in the horizontal direction, so as to support the to-be-constructed box girder.

[0020] The shoe part is a box-shaped structure, end plates are arranged at the two ends of the shoe part, the bottom plate of the shoe part extends along the inclined angle corresponding to the sliding way, and guide plates extending to the two sides of the sliding way are arranged on the two sides of the bottom surface.

[0021] The hinged ends of the two shoe parts respectively extend two hinged plates, and the two hinged plates are respectively arranged on the two sides of the through hole.

[0022] Preferably, the end of the sliding way away from the driving mechanism is provided with a counterforce seat, and the traction cable is correspondingly connected with the counterforce seat.

[0023] The end of the counterforce seat close to the to-be-constructed box girder is provided with a limiting plate, and a limiting sensor corresponding to the to-be-constructed box girder is arranged on the limiting plate.

[0024] Preferably, a full-support frame is arranged between the two sliding ways, and a screw adjusting head is arranged at the upper end of the full-support frame.

[0025] Preferably, the driving mechanism is provided with a push plate near one end of the box girder to be constructed, and a pressure sensor is arranged between the push plate and the driving mechanism.

[0026] Beneficial effects: the box girder is assembled at the end of the slide far away from the existing high-speed railway, after assembly, the slide shoe and the traction cable are used to drive the transverse movement of the box girder to be constructed to the designed box girder placing station, the slide is arranged in an inclined manner, so that when instability occurs, the slide has a tendency to fall away from the existing high-speed railway, thereby effectively ensuring the operation safety of the existing railway, shortening the construction period and improving the construction quality. BRIEF DESCRIPTION OF DRAWINGS

[0027] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description of the exemplary embodiments of the application given below, explain the application, and do not limit the application. In the drawings:

[0028] Figure 1 Structure diagram of the transverse movement system in the specific embodiment provided by the application;

[0029] Figure 2 Transverse movement schematic diagram of the box girder in the specific embodiment provided by the application;

[0030] Figure 3 For Figure 2 schematic diagram at A in the middle;

[0031] Figure 4 Assembly schematic diagram of the slide in the specific embodiment provided by the application;

[0032] Figure 5 Front view diagram of the slide shoe in the specific embodiment provided by the application;

[0033] Figure 6 Top view diagram of the slide shoe in the specific embodiment provided by the application;

[0034] Figure 7 Sectional view diagram of the slide shoe in the specific embodiment provided by the application.

[0035] In the drawings: 1, steel pipe pile; 2, slide; 3, counterforce seat; 4, existing high-speed railway; 5, box girder to be constructed; 6, continuous jack; 7, shoe; 8, traction cable; 9, pier; 10, box girder placing station; 11, full-frame support; 12, traction rod; 13, hardened concrete; 14, I-beam; 15, U-shaped hinged seat; 16, jacking piece; 17, upper flange; 18, supporting short section; 19, lower flange; 20, limiting column; 21, limiting nut; 22, hinged plate; 23, rib plate; 24, guide plate; 25, perforation. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0037] In the description of the present application, the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application, and are not required to be the specific orientations and operations of the present application, and therefore cannot be understood as limitations on the present application. The terms "connected", "connected" used in the present application should be understood broadly, for example, can be fixed connection, can also be detachable connection; can be directly connected, can also be indirectly connected through intermediate components, and those skilled in the art can understand the specific meanings of the above terms according to specific circumstances.

[0038] The present application will be described in detail below with reference to the drawings and in combination with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0039] In the prior related art, the box girder can be assembled on the side of the bridge to be constructed through the slide 2, and then slid to the position through the transverse movement, so that the box girder assembly process can be farthest away from the existing high-speed railway 4. In the current technology, the slide shoe generally slides horizontally, and the bottom full-frame needs to be removed before sliding, so that there is a lack of protection during the construction process, and once the box girder loses stability, the existing high-speed railway 4 is easily damaged.

[0040] As shown in Figures 1-7 A transverse movement system adjacent to the box girder of the existing high-speed railway 4, comprising a slide 2, a slide shoe, a traction cable 8, two slides 2 are distributed below the box girder placing station 10 and extend horizontally along the width direction of the box girder to the side away from the existing high-speed railway 4, the length of the slide 2 is greater than twice the width of the box girder to be constructed 5, and the specific length and inclination angle of the slide 2 are based on the movement interference between the bottom surface of the box girder and the pier 9 during transverse movement, so that the box girder can be assembled at the end of the slide 2 away from the box girder placing station 10, and after assembly is completed, the transverse movement is driven through the traction cable 8 and the driving mechanism. In order to ensure the stability of the transverse movement of the box girder, the slide shoe for bearing the box girder to be constructed 5 is arranged on the slide 2, and the slide shoe is assembled along the slide 2, so as to ensure the stability of the sliding and the safety of the transverse movement.

[0041] Specifically, the driving mechanism and the traction cable 8 are used as the main power device. One end of the traction cable 8 is connected to the slide 2 near one side of the existing high-speed railway 4, and the other end passes through the slide shoe and is connected to the driving mechanism. The driving mechanism is blocked at the side of the slide 2 away from the existing high-speed railway 4, so as to push the slide shoe to move along the slide 2 under the traction of the traction cable 8.

[0042] In the embodiment, the slide 2 is inclined upward at one end corresponding to the box girder placing station 10, so that the box girder 5 to be constructed can be tilted away from the existing high-speed railway 4 when instability occurs, effectively ensuring the operation safety of the existing railway.

[0043] The slide 2 is higher than the box girder placing station 10 at one end corresponding to the box girder placing station 10, so that the lower surface of the box girder 5 to be constructed is higher than the upper surface of the box girder placing station 10 after the box girder 5 to be constructed is placed. At this time, the box girder 5 to be constructed is placed by performing the beam falling construction.

[0044] Preferably, the inclination angle of the slide 2 is 5°, and the length of the slide 2 is calculated according to the shape and size of the pier 9. The calculation is based on the principle that the box girder does not interfere with the pier 9 during movement.

[0045] The traction cable 8 is made of 10 standard steel strands of 7xφ5, with a nominal diameter of φ15.2mm, a nominal cross section of 140mm2, Ep=1.95x105Mpa, and a strength level of 1860Mpa low relaxation high strength steel strand. The driving mechanism is a continuous jack 6 (existing equipment), which includes two hydraulic cylinders connected as a whole along the same axis. The hydraulic cylinder is a center hole hydraulic cylinder, through which the traction cable 8 passes, and a locking device corresponding to the traction cable 8 is provided. With the cooperation of the two hydraulic cylinders, the traction cable 8 can be moved along the traction cable 8, so that the traction cable 8 can be stably and continuously driven, and the slide shoe can be pushed by the reaction force. The continuous jack uses a 2500-5000kN continuous jack 6. Specifically:

[0046] The continuous jack includes two perforated oil cylinders connected by a plurality of fixed columns, and the two perforated oil cylinders extend along the same axis. A clamping mechanism corresponding to the traction cable is provided at the end of the piston rod of each perforated oil cylinder.

[0047] The clamping mechanism includes a main sleeve, wedge-shaped blocks and an extrusion sleeve. The main sleeve is threadedly connected to the end of the piston rod of the perforated oil cylinder. The inner hole of the main sleeve away from the piston rod of the perforated oil cylinder is a tapered extrusion opening. A plurality of wedge-shaped blocks extend into the tapered extrusion opening. The outer periphery of the main sleeve is connected to the extrusion sleeve through a plurality of extrusion rods. The extrusion sleeve extrudes the wedge-shaped blocks into the tapered extrusion opening, so that the wedge-shaped blocks can tightly hold the traction cable in the circumferential direction.

[0048] A plurality of wedge-shaped blocks are uniformly distributed in the circumference of the tapered extrusion opening, and a gap is provided between two adjacent wedge-shaped blocks; the outer wall of the wedge-shaped block is a tapered surface corresponding to the tapered extrusion opening, and the inner wall of the wedge-shaped block is an arc surface corresponding to the traction cable; an extrusion spring is arranged between the wedge-shaped block and the end of the perforated oil cylinder piston rod, so that the wedge-shaped block has a tendency to exit the tapered extrusion opening. The fixed column has a plurality of fixed columns which are uniformly distributed in the circumference of the continuous jack.

[0049] In an optional embodiment, a plurality of steel pipe piles 1 are arranged below the slide 2, the steel pipe piles 1 can be welded or threaded, a concrete hardening 13 is arranged below the steel pipe piles 1, the lower end of the steel pipe piles 1 is fixed to the ground of the concrete hardening 13 through embedded bolts, and the plurality of steel pipe piles 1 are uniformly distributed in the length direction of the slide 2, thereby stably supporting the slide 2.

[0050] A jacking member 16 is arranged at the upper end of the steel pipe pile 1, the jacking member 16 can be telescopic in the longitudinal direction, after the to-be-constructed box girder 5 is slid into position, the jacking member 16 is retracted, thereby lowering the slide 2 to drop the to-be-constructed box girder 5 on the box girder placing station 10, without the need to arrange a beam dropping device on the top of the pier 9, thereby improving the construction efficiency.

[0051] In an optional embodiment, the upper end of the jacking member 16 is connected to a support short section 18 through an upper flange 17, the support short section 18 is a steel pipe with the same diameter as the steel pipe pile 1, and is used for supporting between the jacking member 16 and the slide 2, the lower end of the jacking member 16 is connected to the steel pipe pile 1 through a lower flange 19, a plurality of limiting columns 20 are arranged between the upper flange 17 and the lower flange 19, the jacking member 16 can be a hydraulic cylinder, and a plurality of jacking members 16 can be synchronously or individually telescopic, and the beam dropping operation is performed when synchronously lowered.

[0052] The two ends of the limiting column 20 respectively pass through the upper flange 17 and the lower flange 19, and guide the lifting of the support short section 18, thereby improving the lifting stability, and further, the limiting column 20 is threadedly assembled with a limiting nut 21 blocking the lower surface of the upper flange 17 and the upper surface of the lower flange 19, respectively, in the sliding stage, the support is blocked by the limiting nut 21, thereby ensuring the stability of the support.

[0053] In the embodiment, two slides 2 are respectively arranged at the two ends of the to-be-constructed box girder 5, and the steel pipe piles 1 are anchored to the corresponding piers 9 through the traction rods 12. In order to reduce the friction coefficient, butter should be applied on the top surface of the slide 2 before the box girder is transversely moved to play a lubricating role, the transverse moving operation needs to be commanded by a special person, two continuous jacks are used as the transverse moving force, and the two continuous jacks 6 are synchronous when power is applied, thereby ensuring that the moving process of the platform is synchronous in each section. After each jacking stroke (20 cm) is completed, the moving stroke of the platform needs to be measured, and if the error is found to be out of synchronization, the next stroke needs to be adjusted and then operated, until the beam dropping position is reached.

[0054] In an optional embodiment, the slide 2 comprises a plurality of short sections spliced with each other, and adjacent two short sections are fixed by bolts; the steel pipe pile 1 of each slide 2 is double-row, and connecting systems are arranged between the steel pipe piles 1. The support section 18 of the corresponding two steel pipe piles 1 is provided with an I-beam 14, and the two ends of the I-beam 14 are fixed with the support section 18 by welding or bolts.

[0055] The upper surface of the I-beam 14 is provided with a U-shaped hinged seat 15 corresponding to the slide 2, and the slide 2 is provided with a hinged hole corresponding to the U-shaped hinged seat 15. The slide 2 is fixed by inserting a hinge shaft into the U-shaped hinged seat 15 and the hinged hole. After being hinged, the middle part of the U-shaped hinged seat 15 has a certain spacing with the lower surface of the slide 2, so that the corresponding lifting piece 16 can be lifted according to actual needs. In this way, the slide 2 can be adjusted according to actual needs to form a preset angle, so as to reduce the construction accuracy of the steel pipe pile 1 and effectively improve the sliding assembly efficiency through the hinged form.

[0056] In an optional embodiment, the shoe comprises two shoe pieces 7 hinged with each other, the length of the two shoe pieces 7 after being hinged is adapted to the length of the bottom surface of the box girder, the top plates of the two shoe pieces 7 are located on the same horizontal plane, and the bottom plates of the two shoe pieces 7 are located on the extension plane of the same inclined surface, so as to form an inclined and extended inclined surface corresponding to the slide 2, thereby meeting the requirement of lifting the box girder in the actual sliding process. The middle part of the two shoe pieces 7 is provided with a perforation 25 corresponding to the traction cable 8; the perforation 25 is a waist-shaped hole extending in the longitudinal direction, which can give way to the traction cable 8 in the sliding process of the shoe, and ensure that the traction cable 8 will not be interfered with movement.

[0057] In the embodiment, the shoe piece 7 has a flat surface extending in the horizontal direction to support the box girder 5 to be constructed. The shoe piece 7 has a box structure, specifically, two groups of double-spliced steel plates are arranged between the top plate and the bottom plate, so that the cross section of the shoe piece 7 forms a double-spliced I-beam structure. End plates are arranged at both ends of the shoe piece 7, and the perforation 25 is located on the end plate. The outer sides of the two groups of double-spliced steel plates are uniformly distributed with rib plates 23. The bottom plate of the shoe piece 7 extends along the inclination angle of the slide 2, so that the bottom plate extends at an inclination angle adapted to the slide 2. The bottom plates of the two shoe pieces 7 are located on the same inclined surface, and the side of the corresponding double-spliced steel plate corresponding to the bottom plate is adapted to the inclined surface, so as to adapt to the inclination angle of the slide 2. The two sides of the bottom plate are provided with guide plates 24 extending to both sides of the slide 2. The spacing between the guide plates 24 is adapted to the width of the slide 2, so as to guide the shoe.

[0058] The hinged ends of the two shoes 7 respectively extend two hinged plates 22, which are respectively located on both sides of the through hole 25 to make room for the through hole 25, and are hinged by a hinge shaft. The hinged plates 22 of the two shoes 7 have a spacing difference, so that the two hinged plates 22 of one shoe 7 are located between the two hinged plates 22 of the other shoe 7.

[0059] The two shoes 7 are hinged to ensure the fit when the flatness of the bottom plate of the box girder is not high, to ensure the stability of the box girder after the box girder is placed, and further, to reduce the size and weight of the sliding shoe through splicing, and to reduce the difficulty of disassembly.

[0060] In an optional embodiment, the end of the slide 2 away from the driving mechanism is provided with a counterforce seat 3, which is welded or bolted on the slide 2 and extends upward, and the traction cable 8 is connected to the counterforce seat 3 through the tool anchor and the clamping piece; the end of the counterforce seat 3 close to the box girder to be constructed 5 is provided with a limiting plate, and the limiting plate is provided with a limiting sensor corresponding to the box girder to be constructed 5.

[0061] The limiting plate is slidingly assembled on the slide 2, and the position of the limiting plate can be adjusted to limit the transverse position of the box girder, so as to ensure the accurate positioning of the box girder.

[0062] The guide plate 24 is provided with a plurality of screw holes uniformly distributed along the length direction thereof, and the positioning bolts pass through the screw holes to tightly press the slide 2 to fix the sliding shoe.

[0063] In an optional embodiment, a full-support 11 is arranged between the two slides 2, the upper end of the full-support 11 is provided with a threaded adjusting head, the threaded adjusting head is a threaded stud, the upper end is provided with a top plate, and the lower end is threadedly assembled on the full-support 11, the full-support 11 is used to support the splicing of the box girder, a splicing template corresponding to the box girder is arranged between the two slides 2, the upper surface of the full-support 11 (the upper surface of the splicing template) is in the same plane as the upper surface of the sliding shoe, so as to splice the steel box girder on the side of the box girder placing station 10, and the threaded adjusting head at the upper end of the full-support 11 can be adjusted according to actual needs.

[0064] In this embodiment, the sliding shoe extends upward along the slide 2, so as to be separated upward from the upper end of the full-support 11 during transverse movement, and thus the full-support 11 does not need to be removed during transverse movement, the full-support 11 covers the spacing between the slides 2, the threaded adjusting heads at the upper ends of the full-supports 11 are in the same horizontal plane, and are in the same horizontal plane as the lower surface of the box girder to be constructed 5 after being positioned, so as to improve the safety of the box girder during the falling process by the full-support 11, the slide 2 is lowered to be separated from the box girder, then the threaded adjusting head is gradually lowered to remove the full-support, and then the steel pipe pile 1 can be removed.

[0065] The driving mechanism is a continuous jack 6. After the box girder is completed, the formwork on both sides of the box girder web is removed, a φ150 galvanized steel pipe is arranged in the sliding shoe, a steel strand is arranged in the steel pipe, a tool anchor and a clamping piece are arranged on the reaction seat 3 to fix the steel strand, a YDC135Q jack is used to pre-tighten the steel strand, and the tensioning force reaches 10 kN. After the steel strands arranged in the two sliding shoes are pre-tightened, the continuous jack is installed.

[0066] The driving mechanism is provided with a push plate close to one end of the box girder 5 to be constructed, and a pressure sensor is arranged between the push plate and the driving mechanism. The push plate is used to stop the sliding shoe, and the push plate is stopped to perform safety inspection when the pressure is abnormal.

[0067] In an optional embodiment, the jacking member 16, the pressure sensor, the limit sensor and the continuous jack are correspondingly connected to a PLC controller to form an intelligent push system. The system controls the front jacking and rear jacking of the continuous jack 6 to be alternately operated, so that the pushing force is continuously transmitted.

[0068] In order to ensure that the pushing force is continuously transmitted, the PLC collects the position signal of the proximity switch arranged on the jack, controls the alternating extension and contraction of the front jacking piston and the rear jacking piston, and the output jacking is seamlessly alternated between the front jacking and the rear jacking. The intelligent visual control part can monitor the pulling speed of the two jacks in real time, and automatically compensate and adjust the speed to ensure that the speeds of the two jacks are consistent. A scale is pasted on the sliding way 2, and marks are arranged on the bottom plate of the box girder. The distance of the box girder is observed manually, and the posture of the box girder is monitored according to the walking data of the intelligent jack.

[0069] When the remaining distance of the horizontal movement is the last 1 m, the pushing speed starts to gradually slow down, and a wedge-shaped block is arranged on the sliding way 2 to prevent the pushing construction from being pulled. After the pushing is in place, the sliding shoes are limited in both directions by the wedge-shaped reaction seat 3 to prevent the box girder from sliding.

[0070] The horizontal movement speed is controlled at 15-20 cm / min, i.e. 9-12 m / h. Each piece of box girder needs to be horizontally moved by 8.7 m to reach the position of the falling girder.

[0071] ①Pushing pulling force and safety factor calculation:

[0072] The self-weight of each simply supported box girder is (316.1+15.4)×2.6=861.9 t, the self-weight of each pulling jack is 0.983 t, and the self-weight of the sliding shoe is 1.66 t, totaling 825.486 t.

[0073] The friction force calculation formula is F=G×μ.

[0074] The pushing friction coefficient is μstatic=0.2 and μdynamic=0.1.

[0075] The maximum pushing force required at start-up is F=G×μstatic=1723.8 kN

[0076] The pushing force F required in the pushing process = G x mu = 861.9kN

[0077] Power reserve 5000kN > 1723.8kN

[0078] Requirements are met.

[0079] 2. Steel strand safety checking

[0080] According to the YB / T 152-1999 High-strength Low-relaxation Pre-stressed Hot Galvanized Steel Strand, the maximum load of the 1860MPa φ15.2mm steel strand is 259kN. The load bearing of the steel strand is: 10 x 259 = 2590kN > 1651kN, which meets the requirements.

[0081] 3. Disassembly of the sliding shoe and the driving mechanism

[0082] After the box girder is pushed into place, the box girder is lifted upward as a whole with the slide 2, the limiting nut 21 on the limiting column 20 is disassembled, and then the lifting piece 16 is lowered to realize the falling of the girder. After the sliding shoe is separated from the box girder, the full support 11 is disassembled, and then the sliding shoe, the slide 2, the lifting piece 16 and the steel pipe pile 1 are disassembled one by one.

[0083] The displacement sensor is equipped on the lifting piece 16, which can monitor the displacement of each lifting piece. At the same time, the balance control valve is equipped inside to ensure the synchronization during the lifting and falling of the jack. In cooperation with the measuring prism placed on the precast girder in advance, the bridge posture is monitored by the total station.

[0084] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application is within the protection scope of the claims of the present application.

Claims

1. A system for moving adjacent to an existing high-speed railway box girder, characterized by, The utility model relates to a box girder placing device for high-speed railway, which comprises: a slide way, two slide ways are arranged at intervals below a box girder placing station and extend horizontally along the width direction of the box girder to a side far away from an existing high-speed railway; a slide shoe, the slide way is provided with a slide shoe for bearing a box girder to be constructed, and the slide shoe is assembled along the slide way to slide; a traction cable, one end of the traction cable is connected to the side of the slide way close to the existing high-speed railway, and the other end passes through the slide shoe and is connected to a driving mechanism to push the slide shoe to move along the slide way; wherein one end of the slide way corresponding to the box girder placing station is inclined upward so that the lower surface of the box girder to be constructed is higher than the upper surface of the box girder placing station after the box girder to be constructed is placed; a plurality of steel pipe piles are arranged below the slide way, and the steel pipe piles are uniformly distributed along the length direction of the slide way, a jacking piece is arranged at the upper end of the steel pipe pile to lower the box girder to be constructed to the box girder placing station through the jacking piece; the upper end of the jacking piece is connected to a support segment through an upper flange, the lower end of the jacking piece is connected to the steel pipe pile through a lower flange, a plurality of limiting columns are arranged between the upper flange and the lower flange, the two ends of the limiting column pass through the upper flange and the lower flange respectively, and the limiting column is screw assembled with limiting nuts for stopping the upper surface of the lower flange and the lower surface of the upper flange respectively.

2. The system for moving the adjacent box girder of the existing high-speed railway according to claim 1, wherein, The two slide ways are respectively located at the two ends of the box girder to be constructed, and the steel pipe piles are anchored on the corresponding piers through traction rods.

3. The system for moving the adjacent box girder of the existing high-speed railway according to claim 1, wherein, The slide way comprises a plurality of segments that are spliced with each other, and adjacent two segments are fixed through bolts; the steel pipe piles of each slide way are double rows, a steel I-beam is arranged on the support segments of the two corresponding steel pipe piles, the upper surface of the steel I-beam is provided with a U-shaped hinged seat corresponding to the slide way, and the slide way is provided with a hinged hole corresponding to the U-shaped hinged seat in the lower part.

4. The system for moving the adjacent railway box girder of the existing high-speed railway according to claim 1, wherein, The slide shoe comprises two shoe pieces that are hinged with each other, the lower surfaces of the two shoe pieces are inclined surfaces corresponding to the slide way, and a through hole corresponding to the traction cable is arranged in the middle of the two shoe pieces; the driving mechanism is a continuous jack, and the through hole is a waist-shaped hole extending in the longitudinal direction.

5. The system for moving the adjacent railway box girder of the existing high-speed railway according to claim 4, characterized in that, The shoe piece has a flat surface extending in the horizontal direction to support the box girder to be constructed; the shoe piece is a box structure, end plates are arranged at the two ends of the shoe piece, the bottom plate of the shoe piece extends along the inclination angle corresponding to the slide way, and the two sides of the bottom surface are provided with guide plates extending to the two sides of the slide way; hinged plates are arranged at the hinged ends of the two shoe pieces respectively, and the two hinged plates are respectively located on the two sides of the through hole.

6. The system for moving the adjacent railway box girder of the existing high-speed railway according to claim 1, wherein, The end of the slide way far away from the driving mechanism is provided with a counterforce seat, and the traction cable is connected to the counterforce seat; a limiting plate is arranged at the end of the counterforce seat close to the box girder to be constructed, and a limiting sensor corresponding to the box girder to be constructed is arranged on the limiting plate.

7. The system for moving the adjacent railway box girder of the existing high-speed railway according to claim 1, wherein, a full-support frame is arranged between the two slide ways, and a threaded adjusting head is arranged at the upper end of the full-support frame.

8. The system for moving the adjacent railway box girder of the existing high-speed railway according to claim 1, wherein, a push plate is arranged at the end of the driving mechanism close to the box girder to be constructed, and a pressure sensor is arranged between the push plate and the driving mechanism.

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