A construction method for transverse moving of cast-in-place beam of high-speed railway station bridge in narrow valley

Abstract

The application provides a narrow valley high-speed rail station bridge cast-in-place beam transverse moving construction method, relates to the technical field of building engineering construction method, and comprises the following steps: step 1, a guide rail is fixedly installed on a temporary support platform, a sliding block is installed on the guide rail, the sliding block is connected with a transverse jack through a steel wire rope, and the steel wire rope is kept in tension at any time through an adjusting mechanism; step 2, a cast-in-place beam is moved to the sliding block through a vertical jack; step 3, the sliding block is pulled through the transverse jack at the front end of the guide rail, and the sliding block is restrained through the transverse jack at the rear end of the guide rail; and step 4, when the cast-in-place beam reaches the installation position, the cast-in-place beam is moved to the installation support through the vertical jack. Therefore, the operation steps are greatly simplified, the labor intensity of construction personnel is reduced, and the cast-in-place beam transverse moving construction efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of construction methods for building projects, and in particular to a method for transversely shifting cast-in-situ beams of a high-speed railway station bridge in a narrow valley. Background Art

[0002] In recent years, with the rapid development of high-speed rail construction in my country, an increasing number of high-speed rail stations have been built in mountainous areas. Mountainous terrain is complex, especially in narrow V-shaped valleys. Traditional cast-in-place beam construction methods often face challenges such as high construction difficulty, high safety risks, and high costs. To address these issues, the cast-in-place beam transverse shifting construction method has emerged.

[0003] The transverse movement construction of cast-in-place beams is a method for constructing cast-in-place beams in narrow V-shaped valleys. This method sets a sliding rail under the cast-in-place beam and uses a jack to move the cast-in-place beam transversely to a specified position along the sliding rail. The transverse movement construction method of cast-in-place beams generally includes the following steps: after the tensioning and grouting of the cast-in-place beam is completed, a sliding rail is installed on a temporary support platform, and a slider is installed on the sliding rail. A transverse jack is set at each end of the sliding rail, and the two transverse jacks are connected to the front and rear ends of the slider through a plurality of detachable threaded steel bars; then the cast-in-place beam is transferred to the slider by the vertical jack, and the slider is pulled by the transverse jack at the front end of the slider to slide on the sliding rail, driving the cast-in-place beam to move transversely. In the process of pulling the slider to slide, the slider is restrained by the transverse jack at the rear end of the slider, so that the movement of the slider is in a stable and controlled state. When the cast-in-place beam reaches the installation position, the cast-in-place beam is transferred to the installation support by the vertical jack, and the cast-in-place beam is docked and fixed to the installation support.

[0004] In the above-mentioned cast-in-place beam transverse shifting construction method, since the lateral jack can only pull a limited length at a time, multiple pulling operations are required. After each pulling operation, the threaded steel bar at the front end of a slider needs to be removed, and the remaining threaded steel bar needs to be connected to the slider. At the same time, the threaded steel bar at the rear end of the slider needs to be separated from the slider. The threaded steel bar removed from the front end of the slider is then connected to the threaded steel bar at the rear end of the slider, and then the connected threaded steel bar is reconnected to the rear end of the slider. Therefore, the operation steps are relatively cumbersome, the labor intensity of the construction workers is high, and the efficiency of cast-in-place beam transverse shifting construction is low. Summary of the Invention

[0005] The purpose of this application is to provide a method for transverse displacement construction of cast-in-situ beams of high-speed railway station bridges in narrow valleys, which is used to solve the problems in related technologies of transverse displacement construction of cast-in-situ beams, which have complicated operation steps, high labor intensity for construction workers and low construction efficiency.

[0006] This application provides a method for transverse displacement of cast-in-situ beams for a high-speed railway station bridge in a narrow valley, which adopts the following technical solutions:

[0007] A method for transverse displacement of cast-in-situ beams of a high-speed railway station bridge in a narrow valley comprises the following steps:

[0008] Step 1: After the tensioning and grouting of the cast-in-place beam is completed, a guide rail is fixed on the temporary support platform, a transverse jack is fixed on each end of the guide rail, a slider is installed on the guide rail, the slider is connected to the transverse jack through a steel wire rope, and an adjustment mechanism is set between the transverse jack and the slider to keep the steel wire rope in a tensioned state at all times through the adjustment mechanism;

[0009] Step 2: Transfer the cast-in-place beam to the slider using a vertical jack;

[0010] Step 3: Control the transverse jacks at both ends of the guide rail to work synchronously. The slider is pulled by the transverse jack at the front end of the guide rail, and the slider is restrained by the transverse jack at the rear end of the guide rail. Every time the piston rod of the transverse jack retracts and retracts, the wire rope is adjusted by the adjustment mechanism to keep the wire rope in a taut state.

[0011] Step 4: When the cast-in-place beam reaches the installation position, transfer the cast-in-place beam to the installation support through the vertical jack, and connect and fix the cast-in-place beam to the installation support.

[0012] By adopting the above technical solution, the slider is connected to the transverse jack via a steel wire rope, and an adjustment mechanism is provided between the transverse jack and the slider. The adjustment mechanism keeps the steel wire rope in a taut state at all times, thereby pulling and restraining the lateral sliding of the slider during the lateral movement of the cast-in-place beam, so that the slider slides stably on the guide rail in a controlled state. Since the steel wire rope replaces the multiple threaded steel bars used in the related art lateral movement construction method of cast-in-place beams, after each traction stroke, the steel wire rope only needs to be adjusted once through the adjustment mechanism to keep it in a taut state, without the need to disassemble or install the threaded steel bars. This greatly simplifies the operation steps, reduces the labor intensity of construction personnel, and improves the efficiency of the lateral movement of cast-in-place beams.

[0013] Optionally, in step 1, after the tensioning and grouting of the cast-in-place beam is completed, before the guide rail is installed on the temporary support platform, a temporary pad is first set on the temporary support platform, and the cast-in-place beam is transferred to the temporary pad. Then, the cast-in-place beam is lifted by a vertical jack, and then multiple layers of protective pads are placed on the temporary support platform. The temporary pads are removed, and then the cast-in-place beam is dropped onto the protective pad by a vertical jack.

[0014] By adopting the above technical solution, multiple layers of protective pads are placed on the temporary support platform, and the cast-in-place beam is dropped onto the protective pads by the vertical jack. Therefore, in the process of transferring the cast-in-place beam to the slider by the vertical jack, the cast-in-place beam can be first lifted by the vertical jack, and then the protective pads are removed layer by layer. In the process of removing the protective pads layer by layer, the cast-in-place beam is dropped back and transferred to the slider by the vertical jack. In the process of the cast-in-place beam falling back, the overall height of the protective pads is gradually reduced, avoiding unexpected situations such as failure of the vertical jack during the falling back process, and the cast-in-place beam will not fall with a large drop, thereby achieving better protection effect.

[0015] Optionally, in step 4, after the cast-in-place beam reaches the installation position, the cast-in-place beam is lifted by a vertical jack, and then multiple layers of protective pads are placed on the temporary support platform. The cast-in-place beam is then dropped onto the protective pads by a vertical jack, and then the guide rails, sliders, wire ropes, adjustment mechanisms and horizontal jacks are removed. The cast-in-place beam is then lifted by a vertical jack, and then the protective pads are removed layer by layer. In the process of removing the protective pads layer by layer, the cast-in-place beam is dropped back and transferred to the installation support by a vertical jack.

[0016] By adopting the above technical solution, multiple layers of protective pads are placed on the temporary support platform, and the cast-in-place beam is dropped onto the protective pads by the vertical jack. Therefore, in the process of transferring the cast-in-place beam to the installation support by the vertical jack, the cast-in-place beam can be first lifted by the vertical jack, and then the protective pads are removed layer by layer. In the process of removing the protective pads layer by layer, the cast-in-place beam is dropped back to the installation support by the vertical jack, so that in the process of the cast-in-place beam falling back, the overall height of the protective pads is gradually reduced, avoiding unexpected situations such as failure of the vertical jack during the falling back process, and the cast-in-place beam will not fall with a large drop, thereby achieving better protection effect.

[0017] Optionally, the adjustment mechanism includes a base, a slide and a wire drum, the base is fixed on a temporary support platform, the slide is slidably mounted on the base, the transverse jack is fixed on the base and connected to the slide, the wire drum is rotatably mounted on the slide, the wire rope is wound around the wire drum, one end of the wire rope is fixed to the wire drum, and the other end is fixed to the slider;

[0018] In step 3, the slide and the wire drum are driven to slide by the transverse jack, and then the slider is pulled or restrained by the wire rope. Each time the piston rod of the transverse jack is extended and retracted back and forth, the wire drum is controlled to rotate, and the wire rope is wound or released to keep the wire rope taut.

[0019] By adopting the above technical solution, the steel wire rope is wound on the wire drum, and the rotation of the wire drum can be controlled to reel in or unreel the steel wire rope, thereby keeping the steel wire rope in a tensioned state.

[0020] Optionally, the adjustment mechanism further includes a first worm, a rack and a mobile driving member, the wire drum is rotatably mounted on the slide via a pivot, a first worm wheel is provided on the pivot, the first worm is rotatably mounted on the slide and meshes with the first worm wheel, a driven gear is provided on the first worm, the rack is movably mounted on the base, the mobile driving member is provided on the base and connected to the rack, and the mobile driving member is used to drive the rack to move toward or away from the driven gear;

[0021] In step 3, the rack is driven toward the driven gear by moving the driving member so that the rack is engaged with the driven gear. When the piston rod of the transverse jack is extended or retracted, the driven gear rotates under the action of the rack, and the first worm gear, the pivot and the drum are driven to rotate through the first worm gear to reel in or unreel the wire rope.

[0022] By adopting the above technical solution, a first worm gear is arranged on the pivot of the wire drum, and the first worm is meshed with the first worm gear. Therefore, when the first worm does not rotate, the first worm gear, the pivot and the wire drum cannot rotate, thereby achieving a better locking effect, avoiding changes in the tension of the wire rope during the traction process, and after each traction stroke, the tension of the wire rope can be adjusted by moving the driving member to adjust the separation and connection relationship between the rack and the driven gear.

[0023] Optionally, the mobile driving member includes a driving screw, a guide rod is provided on the rack, the rack is slidably arranged on the base through the guide rod, a screw sleeve is fixed on the base, the driving screw is threadedly connected to the screw sleeve, and is rotatably connected to the rack;

[0024] In step 3, by rotating the driving screw, the driving rack moves toward or away from the driven gear under the interaction between the driving screw and the screw sleeve.

[0025] By adopting the above technical solution, after each traction stroke, the separation and connection relationship between the rack and the driven gear can be adjusted by manually rotating the driving screw. Compared with the related technology that requires disassembly and installation of threaded steel bars each time, the operation is relatively simple, which can effectively reduce the labor intensity of construction workers and improve construction efficiency.

[0026] Optionally, the adjustment mechanism further includes two groups of transverse rollers and two groups of vertical rollers, the two groups of transverse rollers and the two groups of vertical rollers are rotatably mounted on the slide, and the steel wire rope passes between the two groups of transverse rollers and the two groups of vertical rollers;

[0027] In step 3, when the transverse jack pulls or restrains the slider through the wire rope, the wire rope is limited by two sets of transverse rollers and two sets of vertical rollers so that the wire rope always remains coaxial with the transverse jack.

[0028] By adopting the above technical solution, the wire rope is limited by two sets of horizontal rollers and two sets of vertical rollers, so that the wire rope always remains coaxial with the horizontal jack, so that the tension on the slider is parallel to the guide rail, thereby improving the stability of the slider's lateral sliding.

[0029] Optionally, the slider is provided with two pieces, the two sliders are connected to each other, and the two sliders are arranged front and back along the guide rail;

[0030] In step 1, the slider at the front end is connected to the transverse jack at the front end of the guide rail through a steel wire rope, and the slider at the rear end is connected to the transverse jack at the rear end of the guide rail through a steel wire rope.

[0031] By adopting the above technical solution, the number of sliders is set to two, so that the distance between the two sliders can be adjusted to meet the support and lateral movement needs of cast-in-place beams of different widths.

[0032] Optionally, a PTFE slide plate is fixedly provided on the bottom surface of the slider, and downwardly extending limit plates are provided on both sides of the slider;

[0033] In step 1, the bottom surface of the polytetrafluoroethylene slide plate is brought into contact with the upper surface of the guide rail, and the limiting plates are placed on both sides of the guide rail.

[0034] By adopting the above technical solution, the friction force of the slider sliding on the guide rail can be reduced by the PTFE slide plate, and the limiting plate can play a better limiting role in the sliding of the slider on the guide rail.

[0035] Optionally, the guide rail includes a main rail and a transition rail, the main rail is telescopically provided with a universal wheel, the main rail is provided with a telescopic driving member, the telescopic driving member is connected to the universal wheel, and the telescopic driving member is used to drive the universal wheel to telescope relative to the main rail;

[0036] In step 1, when installing the guide rail on the temporary support platform, first fix the transition guide rail on the temporary support platform, place the main rail on the temporary support platform through the universal wheel, then slide the main rail into place, and then drive the universal wheel to retract into the main rail through the telescopic drive member, so that the main rail falls on the temporary support platform and is fixed, and then the adjacent main rails and the main rail and the transition guide rail are fixedly connected.

[0037] By adopting the above technical solution, since the main rail is usually heavy, a retractable universal wheel is set on the main rail. When installing the main rail on the temporary support platform, the position of the main rail can be easily slid and adjusted with the help of the universal wheel, thereby significantly reducing the labor intensity of construction workers and improving construction efficiency.

[0038] In summary, this application includes at least one of the following beneficial technical effects:

[0039] 1. The slider is connected to the transverse jack via a steel wire rope, and an adjustment mechanism is installed between the transverse jack and the slider. The adjustment mechanism keeps the steel wire rope taut at all times, thereby pulling and restraining the slider's transverse movement during the cast-in-place beam transverse construction process, ensuring stable and controlled sliding of the slider on the guide rail. Since the steel wire rope replaces the multiple threaded steel bars used in the related cast-in-place beam transverse construction method, after each traction stroke, the steel wire rope only needs to be adjusted once through the adjustment mechanism to keep it taut, eliminating the need to disassemble or install the threaded steel bars. This significantly simplifies the operation steps, reduces the labor intensity of construction personnel, and improves the efficiency of cast-in-place beam transverse construction.

[0040] 2. Since the main rail is usually heavy, a retractable universal wheel is set on the main rail. When installing the main rail on the temporary support platform, the universal wheel can be used to easily slide and adjust the position of the main rail, thereby significantly reducing the labor intensity of construction workers and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a structural diagram of the cast-in-situ beam placed on the slider in the embodiment of the present application;

[0042] Figure 2 for Figure 1 Structural diagram after omitting cast-in-place beams;

[0043] Figure 3 for Figure 2 A partial enlarged schematic diagram of part C in the middle;

[0044] Figure 4 This is a schematic structural diagram of the main rail in the embodiment of the present application;

[0045] Figure 5 This is a schematic structural diagram of the universal wheel and other parts in the embodiment of the present application;

[0046] Figure 6 Schematic diagram of the structure of the first bevel gear and the second bevel gear in the embodiment of the present application;

[0047] Figure 7 for Figure 3 A partial enlarged schematic diagram of the middle M part;

[0048] Figure 8 This is a cross-sectional view of the slider and other parts in the embodiment of the present application;

[0049] Figure 9 for Figure 8 A partial enlarged schematic diagram of part B;

[0050] Figure 10 for Figure 2 A partial enlarged schematic diagram of part D in the middle;

[0051] Figure 11 for Figure 1 A partial enlarged schematic diagram of part A.

[0052] Description of reference numerals:

[0053] 10. Cast-in-place beam; 20. Temporary support platform; 21. Pedestal;

[0054] 30. Transverse jack; 31. Piston rod;

[0055] 40. Slider; 41. First through hole; 42. Second through hole; 43. Connecting screw; 44. First nut; 45. PTFE slide; 46. Limiting plate;

[0056] 50. Steel wire rope; 51. Connecting stud; 511. Position limiting boss; 52. Second nut;

[0057] 60. Adjustment mechanism; 61. Base; 62. Slide; 63. Wire drum; 631. Pivot; 632. First worm gear; 64. First worm; 641. Driven gear; 65. Rack; 651. Guide rod; 66. Horizontal roller; 67. Vertical roller; 68. Drive screw; 69. Screw sleeve;

[0058] 70. Main guide rail; 71. Universal wheel; 72. Telescopic drive member; 721. Lifting seat; 722. Second worm gear; 7221. Screw hole; 723. Rotating shaft; 724. Crank handle; 725. Lifting screw; 726. Second worm gear; 727. First bevel gear; 728. Second bevel gear.

[0059] 80. Transition guide rail; 90. Connecting piece. DETAILED DESCRIPTION

[0060] The following is combined with Figure 1 -Attached Figure 11 , further details of this application are given.

[0061] The embodiments of the present application disclose a method for transversely shifting cast-in-situ beams of a high-speed railway station bridge in a narrow valley.

[0062] A method for transverse displacement of cast-in-situ beams of a high-speed railway station bridge in a narrow valley comprises the following steps:

[0063] Step 1. Reference Figure 1 and Figure 2 A pedestal 21 is set on the temporary support platform 20. After the tensioning and grouting of the cast-in-place beam 10 is completed, a temporary pad is first set on the pedestal 21 of the temporary support platform 20, and the cast-in-place beam 10 is transferred to the temporary pad. Then, the cast-in-place beam 10 is lifted by a vertical jack, and then multiple layers of protective pads are placed on the temporary support platform 20. The temporary pads are removed, and then the cast-in-place beam 10 is dropped onto the protective pads by a vertical jack.

[0064] Then fix the guide rail on the temporary support platform 20, refer to Figure 3 and Figure 4 The guide rail includes a main guide rail 70 and a transition guide rail 80, refer to Figure 5 and Figure 6 The main rail 70 is provided with a telescopic universal wheel 71, and the main rail 70 is provided with a telescopic driving member 72. The telescopic driving member 72 is connected to the universal wheel 71, and the telescopic driving member 72 is used to drive the universal wheel 71 to be telescopic relative to the main rail 70.

[0065] When installing the guide rail on the temporary support platform 20, first fix the transition guide rail 80 on the base 21 of the temporary support platform 20 by means of fixing parts such as anchor nails, place the main rail 70 on the temporary support platform 20 by means of the universal wheel 71, then slide the main rail 70 into place, and then drive the universal wheel 71 to retract into the main rail 70 by the telescopic drive part 72, so that the main rail 70 falls on the temporary support platform 20, and is fixed by fixing parts such as anchor nails, then the adjacent main rails 70 are fixedly connected by connecting parts 90 such as bolts and nuts, and the main rail 70 and the transition guide rail 80 are fixedly connected by connecting parts 90 such as bolts and nuts.

[0066] In an optional embodiment, the specific structure of the telescopic drive member 72 and the specific connection relationship with the main rail 70 and the universal wheel 71 are as follows: Figure 5 and Figure 6 The telescopic driving member 72 includes a lifting seat 721, a second worm gear 722, a rotating shaft 723 and a crank 724. The lifting seat 721 is vertically slidably arranged on the main guide rail 70. A lifting screw 725 is provided on the lifting seat 721. The second worm gear 722 is rotatably arranged on the main guide rail 70. A screw hole 7221 is provided on the second worm gear 722. The second worm gear 722 is screwed with the lifting screw 725 through the screw hole 7221. The rotating shaft 723 is rotatably arranged on the main guide rail 70. A second worm gear 726 is provided on the rotating shaft 723. The second worm gear 726 meshes with the second worm gear 722. A first bevel gear 727 is provided on the rotating shaft 723. The crank 724 is rotatably arranged on the main guide rail 70. A second bevel gear 728 is provided on the crank 724. The second bevel gear 728 meshes with the first bevel gear 727.

[0067] When the universal wheel 71 is driven to retract into the main guide rail 70 by the telescopic drive member 72, the crank handle 724 is turned to drive the rotating shaft 723 and the second worm 726 to rotate through the second bevel gear 728 and the first bevel gear 727, and then the second worm gear 722 is driven to rotate through the second worm gear 726. Under the action of the screw hole 7221 of the second worm gear 722 and the lifting screw 725, the lifting screw 725 and the lifting seat 721 are driven to slide relative to the main guide rail 70, so that the universal wheel 71 is retracted into the main guide rail 70.

[0068] After the guide rail is installed on the temporary support platform 20, a horizontal jack 30 is fixed on the temporary support platform 20 at both ends of the guide rail through anchors and other fixing parts. Figure 3 and Figure 7 , a slider 40 is installed on the guide rail, and the slider 40 is provided with two pieces, and the two sliders 40 are arranged front and back along the guide rail, referring to Figure 7 、 Figure 8 and Figure 9 A first through hole 41 is provided on the slider 40, and a connecting screw 43 is passed through the first through hole 41 of the two sliders 40. A first nut 44 is screwed on the connecting screw 43. The first nuts 44 are respectively located at both ends of the slider 40 and abut against the slider 40 to connect the two sliders 40 to each other.

[0069] Reference Figure 7 、 Figure 8 and Figure 9 A PTFE slide plate 45 is fixed on the bottom surface of the slider 40, and downwardly extending limit plates 46 are respectively provided on both sides of the slider 40; when installing the slider 40 on the guide rail, the bottom surface of the PTFE slide plate 45 is in contact with the upper surface of the guide rail, and the limit plates 46 are placed on both sides of the guide rail.

[0070] Then, the slider 40 is connected to the transverse jack 30 through the wire rope 50, and the slider 40 at the front end is connected to the transverse jack 30 at the front end of the guide rail through the wire rope 50, and the slider 40 at the rear end is connected to the transverse jack 30 at the rear end of the guide rail through the wire rope 50.

[0071] A second through hole 42 is provided on the slider 40, and a connecting stud 51 is provided at the end of the wire rope 50. A limiting boss 511 is provided on the connecting stud 51. When the wire rope 50 is connected to the slider 40, the connecting stud 51 is passed through the second through hole 42, and a second nut 52 is screwed on the connecting stud 51, so that the second nut 52 and the limiting boss 511 are respectively located at both ends of the slider 40 and respectively abut against the slider 40, so that the wire rope 50 and the slider 40 are detachably connected.

[0072] An adjustment mechanism 60 is provided between the transverse jack 30 and the slider 40. The adjustment mechanism 60 keeps the wire rope 50 in a tensioned state at all times. In an optional embodiment, the specific structure of the adjustment mechanism 60 and the specific connection relationship between the adjustment mechanism 60, the transverse jack 30 and the slider 40 are as follows:

[0073] Reference Figure 2 and Figure 10 The adjusting mechanism 60 includes a base 61, a slide 62, a wire drum 63, a first worm 64, a rack 65, a mobile driving member, two sets of horizontal rollers 66 and two sets of vertical rollers 67. The base 61 is fixed on the temporary support platform 20, the slide 62 is slidably arranged on the base 61, the horizontal jack 30 is fixed on the base 61 and connected to the slide 62, the wire drum 63 is rotatably arranged on the slide 62 through a pivot 631, the wire rope 50 is wound around the wire drum 63, one end of the wire rope 50 is fixed to the wire drum 63, and the other end is fixed to the slider 40, the two sets of horizontal rollers 66 and the two sets of vertical rollers 67 are rotatably arranged on the slide 62 respectively, and the wire rope 50 passes between the two sets of horizontal rollers 66 and the two sets of vertical rollers 67;

[0074] A first worm gear 632 is provided on the pivot 631 , a first worm 64 is rotatably provided on the slide 62 and meshes with the first worm gear 632 , a driven gear 641 is provided on the first worm 64 , and a rack 65 is movably provided on the base 61 ;

[0075] The mobile driving member is provided on the base 61 and connected to the rack 65. The mobile driving member is used to drive the rack 65 to move toward or away from the driven gear 641. More specifically, the mobile driving member includes a driving screw 68. A guide rod 651 is provided on the rack 65. The rack 65 is slidably provided on the base 61 through the guide rod 651. A screw sleeve 69 is fixed on the base 61. The driving screw 68 is threadedly connected to the screw sleeve 69 and is rotatably connected to the rack 65.

[0076] Step 2: After the guide rail, slider 40, wire rope 50, adjustment mechanism 60 and horizontal jack 30 are installed on the temporary support platform 20, the cast-in-place beam 10 is lifted by the vertical jack, and then the protective pads are removed layer by layer. In the process of removing the protective pads layer by layer, the cast-in-place beam 10 is lowered and transferred to the slider 40 by the vertical jack, forming a Figure 11 The status shown.

[0077] Step 3: Control the lateral jacks 30 at both ends of the guide rail to work synchronously. The slider 40 is pulled by the lateral jack 30 at the front end of the guide rail. More specifically, the piston rod 31 of the lateral jack 30 at the front end of the guide rail is controlled to retract, driving the slide 62 and the wire drum 63 to slide on the base 61. The slider 40 is then pulled forward by the wire rope 50. At this time, the rack 65 is not in contact with the driven gear 641, and the wire drum 63 remains fixed relative to the slide 62.

[0078] At the same time, the slider 40 is restrained by the transverse jack 30 at the rear end of the guide rail. More specifically, by controlling the piston rod 31 of the transverse jack 30 at the rear end of the guide rail to extend, the slide 62 and the wire drum 63 are driven to slide on the base 61. The wire rope 50 then restrains the slider 40 moving forward, so that the slider 40 slides stably on the guide rail in a controlled state. At this time, the rack 65 is not in contact with the driven gear 641, and the wire drum 63 remains fixed relative to the slide 62.

[0079] When the transverse jack 30 pulls or restrains the slider 40 through the wire rope 50, the wire rope 50 is limited by two sets of transverse rollers 66 and two sets of vertical rollers 67, so that the wire rope 50 always remains coaxial with the transverse jack 30;

[0080] Each time the piston rod 31 of the transverse jack 30 is extended and retracted, the steel wire rope 50 is adjusted once by the adjusting mechanism 60 to keep the steel wire rope 50 in a tensioned state. The specific working principle of adjusting the steel wire rope 50 by the adjusting mechanism 60 to keep the steel wire rope 50 in a tensioned state is as follows:

[0081] Each time the piston rod 31 of the transverse jack 30 is extended and retracted back and forth, the wire drum 63 is controlled to rotate, and the wire rope 50 is wound or released, so that the wire rope 50 is kept in a tensioned state;

[0082] More specifically, when the piston rod 31 of the transverse jack 30 at the front end of the guide rail is retracted to its maximum stroke, and the piston rod 31 of the transverse jack 30 at the rear end of the guide rail is extended to its maximum stroke, a traction stroke is completed, and the drive screw 68 is rotated at this time. Under the interaction of the drive screw 68 and the screw sleeve 69, the rack 65 is driven to move toward the driven gear 641, so that the rack 65 is meshed with the driven gear 641; then the piston rod 31 of the transverse jack 30 at the front end of the guide rail is controlled to extend and reset, and at the same time, the piston rod 31 of the transverse jack 30 at the rear end of the guide rail is controlled to retract and reset. When the activity of the transverse jack 30 When the plug rod 31 is extended or retracted to reset, the driven gear 641 rotates under the action of the rack 65, and drives the first worm wheel 632, the pivot 631 and the wire drum 63 to rotate through the first worm 64, and the wire rope 50 is wound through the wire drum 63 of the adjusting mechanism 60 located at the front end of the guide rail, and the wire rope 50 is paid out through the wire drum 63 of the adjusting mechanism 60 located at the rear end of the guide rail, so that the wire rope 50 remains in a tensioned state; then the driving screw 68 is rotated to separate the rack 65 from the driven gear 641, and the transverse jack 30 is controlled to move to pull the slider 40 for the next time.

[0083] Step 4. When the cast-in-place beam 10 reaches the installation position, the cast-in-place beam 10 is lifted by the vertical jack, and then multiple layers of protective pads are placed on the temporary support platform 20. The cast-in-place beam 10 is then dropped onto the protective pads by the vertical jack. The guide rails, sliders 40, wire ropes 50, adjustment mechanisms 60 and transverse jacks 30 are then removed. The cast-in-place beam 10 is then lifted by the vertical jack, and then the protective pads are removed layer by layer. In the process of removing the protective pads layer by layer, the cast-in-place beam 10 is dropped back and transferred to the installation support by the vertical jack, and the cast-in-place beam 10 is docked and fixed to the installation support.

[0084] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A method for transverse displacement of cast-in-situ beams of a high-speed railway station bridge in a narrow valley, characterized in that: The following steps are involved: Step 1: After the tensioning and grouting of the cast-in-place beam (10) is completed, a guide rail is fixedly installed on the temporary support platform (20), a transverse jack (30) is fixedly installed at each end of the guide rail, a slider (40) is installed on the guide rail, the slider (40) is connected to the transverse jack (30) through a steel wire rope (50), and an adjustment mechanism (60) is provided between the transverse jack (30) and the slider (40), so that the steel wire rope (50) is kept in a tensioned state at all times by the adjustment mechanism (60); Step 2: Transfer the cast-in-place beam (10) to the slider (40) using a vertical jack; Step 3, the lateral jacks (30) at both ends of the guide rail are controlled to work synchronously, the lateral jack (30) at the front end of the guide rail is used to pull the slider (40), and the lateral jack (30) at the rear end of the guide rail is used to restrain the slider (40), and each time the piston rod (31) of the lateral jack (30) is extended and retracted back and forth, the steel wire rope (50) is adjusted once by the adjustment mechanism (60), so that the steel wire rope (50) is kept in a tensioned state; Step 4: When the cast-in-situ beam (10) reaches the installation position, the cast-in-situ beam (10) is transferred to the installation support by a vertical jack, and the cast-in-situ beam (10) is docked and fixed to the installation support; The adjusting mechanism (60) includes a base (61), a slide (62) and a wire drum (63), wherein the base (61) is fixed on the temporary support platform (20), the slide (62) is slidably mounted on the base (61), the transverse jack (30) is fixed on the base (61) and connected to the slide (62), the wire drum (63) is rotatably mounted on the slide (62), the steel wire rope (50) is wound around the wire drum (63), one end of the steel wire rope (50) is fixedly connected to the wire drum (63), and the other end is fixedly connected to the slider (40); In step 3, the slide (62) and the wire drum (63) are driven to slide by the transverse jack (30), and the slider (40) is pulled or restrained by the wire rope (50). Each time the piston rod (31) of the transverse jack (30) is extended and retracted, the wire drum (63) is controlled to rotate, and the wire rope (50) is wound or released, so that the wire rope (50) is kept in a tensioned state. The adjusting mechanism (60) further comprises a first worm (64), a rack (65) and a movable driving member, wherein the wire drum (63) is rotatably mounted on the slide (62) via a pivot (631), a first worm wheel (632) is provided on the pivot (631), the first worm (64) is rotatably mounted on the slide (62) and meshes with the first worm wheel (632), a driven gear (641) is provided on the first worm (64), the rack (65) is movably mounted on the base (61), the movable driving member is provided on the base (61) and connected to the rack (65), and the movable driving member is used to drive the rack (65) to move toward or away from the driven gear (641); In step 3, the rack (65) is driven to move toward the driven gear (641) by the moving driving member, so that the rack (65) is engaged with the driven gear (641). When the piston rod (31) of the transverse jack (30) is extended or retracted, the driven gear (641) rotates under the action of the rack (65), and drives the first worm wheel (632), the pivot (631) and the wire drum (63) to rotate through the first worm (64), thereby winding or releasing the wire rope (50); The movable driving member includes a driving screw (68), a guide rod (651) is provided on the rack (65), the rack (65) is slidably arranged on the base (61) via the guide rod (651), a screw sleeve (69) is fixed on the base (61), the driving screw (68) is screwed to the screw sleeve (69), and is rotatably connected to the rack (65); In step 3, by rotating the driving screw (68), the driving rack (65) moves toward or away from the driven gear (641) under the interaction between the driving screw (68) and the screw sleeve (69).

2. The method for transverse displacement of cast-in-situ beams of a high-speed railway station bridge in a narrow valley according to claim 1, characterized in that: In the step 1, after the tensioning and grouting of the cast-in-place beam (10) is completed, before the guide rail is installed on the temporary support platform (20), a temporary pad is first set on the temporary support platform (20), and the cast-in-place beam (10) is transferred to the temporary pad. Then, the cast-in-place beam (10) is lifted by a vertical jack, and then multiple layers of protective pads are placed on the temporary support platform (20). The temporary pads are removed, and then the cast-in-place beam (10) is dropped onto the protective pad by a vertical jack.

3. The method for transverse displacement of cast-in-situ beams of a high-speed railway station bridge in a narrow valley according to claim 1, characterized in that: In step 4, after the cast-in-place beam (10) reaches the installation position, the cast-in-place beam (10) is lifted by a vertical jack, and then multiple layers of protective pads are placed on the temporary support platform (20). The cast-in-place beam (10) is then dropped onto the protective pads by a vertical jack, and then the guide rail, the slider (40), the wire rope (50), the adjustment mechanism (60) and the transverse jack (30) are removed. The cast-in-place beam (10) is then lifted by a vertical jack, and then the protective pads are removed layer by layer. During the process of removing the protective pads layer by layer, the cast-in-place beam (10) is dropped back and transferred to the installation support by a vertical jack.

4. The method for transverse displacement of cast-in-situ beams of a high-speed railway station bridge in a narrow valley according to claim 1, characterized in that: The adjustment mechanism (60) further comprises two groups of transverse rollers (66) and two groups of vertical rollers (67), the two groups of transverse rollers (66) and the two groups of vertical rollers (67) being rotatably mounted on the slide (62), and the steel wire rope (50) passing between the two groups of transverse rollers (66) and between the two groups of vertical rollers (67); In step 3, when the transverse jack (30) pulls or restrains the slider (40) through the wire rope (50), the wire rope (50) is limited by two sets of transverse rollers (66) and two sets of vertical rollers (67), so that the wire rope (50) always remains coaxial with the transverse jack (30).

5. The method for transverse displacement of cast-in-situ beams of a high-speed railway station bridge in a narrow valley according to claim 1, characterized in that: The sliders (40) are provided with two pieces, the two sliders (40) are connected to each other, and the two sliders (40) are arranged front and back along the guide rail; In step 1, the slider (40) at the front end is connected to the transverse jack (30) at the front end of the guide rail via a steel wire rope (50), and the slider (40) at the rear end is connected to the transverse jack (30) at the rear end of the guide rail via a steel wire rope (50).

6. The method for transverse displacement of cast-in-situ beams of a high-speed railway station bridge in a narrow valley according to claim 1, characterized in that: A polytetrafluoroethylene slide plate (45) is fixedly provided on the bottom surface of the slider (40), and downwardly extending limit plates (46) are respectively provided on both sides of the slider (40); In step 1, the bottom surface of the polytetrafluoroethylene slide plate (45) is brought into contact with the upper surface of the guide rail, and the limiting plates (46) are placed on both sides of the guide rail.

7. The method for transverse displacement of cast-in-situ beams of a high-speed railway station bridge in a narrow valley according to claim 1, characterized in that: The guide rail comprises a main rail (70) and a transition rail (80), the main rail (70) being telescopically provided with a universal wheel (71), the main rail (70) being provided with a telescopic driving member (72), the telescopic driving member (72) being connected to the universal wheel (71), and the telescopic driving member (72) being used to drive the universal wheel (71) to telescope relative to the main rail (70); In step 1, when installing the guide rail on the temporary support platform (20), the transition guide rail (80) is first fixedly installed on the temporary support platform (20), and the main guide rail (70) is placed on the temporary support platform (20) through the universal wheel (71), and then the main guide rail (70) is slid into place, and then the universal wheel (71) is driven to retract into the main guide rail (70) through the telescopic driving member (72), so that the main guide rail (70) falls on the temporary support platform (20) and is fixed, and then the adjacent main guide rails (70) and the main guide rail (70) and the transition guide rail (80) are fixedly connected.

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