Fine adjustment method for laying of double-block sleeper

Abstract

The invention belongs to the technical field of ballastless track construction, and particularly relates to a fine adjustment method for laying a double-block sleeper, which comprises the following steps: S1, pre-connecting a sample steel rail with the double-block sleeper, and pre-connecting a steel rail fixing frame with the sample steel rail; s2, the double-block type sleeper is hoisted to a ballastless track base; s3, the left end and the right end of each steel rail fixing frame are each connected with a transverse moving supporting leg; s4, the height and the pitching angle of the supporting leg mounting base are adjusted; s5, the lifting appliance is disassembled, and the height and the pitching angle of the supporting leg mounting base are adjusted for the second time; and S6, a formwork is installed on the ballastless track foundation, and concrete is poured. According to the scheme, the installation work of the elevation adjusting assembly and the work of connecting the steel rail fixing frame with the double-block type sleeper are separated and can be conducted synchronously, then splicing and combination are conducted on the ballastless track foundation, the influence of a sequential construction technology on position fine adjustment and installation progress of the double-block type sleeper can be avoided, and the construction efficiency of the double-block type sleeper is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ballastless track construction, and particularly relates to a fine-tuning method for laying double-block sleepers. Background Art

[0002] A twin-block sleeper is a prefabricated module used in ballastless track construction. Concrete is poured at each end of the sleeper to form two prefabricated sleeper blocks. Patent publication number CN119121715A discloses a centerline and height adjustment device for ballastless track construction. This device enables batch installation of sleeper blocks, thereby improving the speed and efficiency of ballastless track construction.

[0003] However, this technology has some problems in actual use. For example, it is necessary to complete the assembly of the device before lifting the double-block sleeper, and then install and fix the height adjustment mechanism to the concrete foundation after the lifting is completed. Due to the limitations of the use process of the device, it cannot be reversed, which affects the construction efficiency and project progress. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a fine-tuning method for laying double-block sleepers.

[0005] The technical solution adopted in the present invention is:

[0006] A method for fine-tuning the laying of a double-block sleeper comprises the following steps:

[0007] S1: pre-connect two sample rails with a plurality of dual-block sleepers, and pre-connect a rail fixing frame with the sample rails;

[0008] S2: Use a lifting device to connect the rail fixing frame, lift the double-block sleeper to the ballastless track base, and perform preliminary alignment of the double-block sleeper;

[0009] S3: A transverse support leg is connected to the left and right ends of each rail fixing frame, and a support leg mounting seat is slidably connected to each transverse support leg, and each support leg mounting seat is rotatably connected to the elevation adjustment assembly;

[0010] S4: Using the elevation adjustment assembly, the height of the outrigger mounting base is adjusted, and then the pitch angle of the outrigger mounting base is adjusted so that the inclination of the bi-block sleeper reaches a preset value; then, the lower end of the elevation adjustment assembly is abutted against the ballastless track foundation, and the upper end of the elevation adjustment assembly is connected to the ballastless track through a support rod to maintain the state of the bi-block sleeper;

[0011] S5: Remove the spreader, further adjust the height and pitch angle of the outrigger mounting bracket, and then adjust the centerline position of the rail fixing frame so that the centerline of the double-block sleeper reaches the predetermined position;

[0012] S6: Install formwork on the left and right sides of the double-block sleeper on the ballastless track foundation; pour concrete between the formwork to form a concrete pouring layer to fix the double-block sleeper; after the concrete solidifies, disconnect the connection between the sample rail and the double-block sleeper and the connection between the elevation adjustment assembly and the ballastless track foundation, and use a hoist to lift away the sample rail, elevation adjustment assembly and transverse support legs.

[0013] As an alternative or supplement to the above structure: the elevation adjustment assembly includes a lateral arm, an inner sleeve and an outer sleeve; the outer sleeve is tubular, the lateral arm is fixed to the outer wall of the outer sleeve and is connected to the leg mounting seat; the inner sleeve is slidably arranged in the outer sleeve; the lower end of the inner sleeve extends out of the outer sleeve, and the upper end of the inner sleeve is fixedly connected with a height adjustment threaded sleeve, and the height adjustment threaded sleeve is matched with the height adjustment screw thread; the height adjustment screw is coaxially arranged in the outer sleeve and is driven by the height adjustment motor to control the height of the leg mounting seat.

[0014] As an alternative or supplement to the above structure: a manual adjustment shaft is provided above the height adjustment motor, and the manual adjustment shaft is transmission-connected to the rotating shaft of the height adjustment motor.

[0015] As an alternative or supplement to the above structure: the lower end of the inner sleeve is detachably connected to a foot pad or height-enhancing foot, and connecting ears are provided on the outer sides of the upper end of the foot pad, the upper end of the height-enhancing foot and the lower end of the inner sleeve; the two connecting ears are connected by bolts.

[0016] As an alternative or supplement to the above structure: an end ring is connected to the lower end of the outer sleeve, and the end ring is sleeved outside the inner sleeve and closes the gap between the outer sleeve and the inner sleeve.

[0017] As an alternative or supplement to the above structure: a dustproof cover is provided outside the height adjustment motor; the manual adjustment shaft is also located in the dustproof cover, and the upper end of the manual adjustment shaft extends upward out of the dustproof cover; an upper seat plate is provided above the height adjustment motor, the upper seat plate is fixedly connected to the dustproof cover, and the manual adjustment shaft is connected to the center of the upper seat plate through a bearing; the upper end of the outer sleeve is fixedly connected to the lower seat plate; the lower edge of the dustproof cover is sealed to the edge of the lower seat plate.

[0018] As an alternative or supplement to the above structure: a transverse driving motor is fixedly installed at the end of the transverse support leg on one side of the rail fixing frame; a transverse screw is provided in the transverse support leg, and a transverse screw sleeve is threadedly sleeved on the transverse screw; the transverse driving motor is transmission-connected to the transverse screw; the transverse screw sleeve is fixedly connected to the support leg mounting seat to control the transverse adjustment mechanism to move left and right when the transverse screw rotates; the transverse screws on the left and right sides of the transverse adjustment mechanism are synchronously linked through a transmission rod.

[0019] As an alternative or supplement to the above structure: the rail fixing frame is vertically fixed to the sample rail, and each rail fixing frame has detachable transverse support legs at both ends; when two transmission rods are provided in the fixed cross bar of the rail fixing frame, the two transmission rods are connected by a universal connector.

[0020] As an alternative or supplement to the above structure: the support leg mounting seat includes a first pitch axis, a vertical threaded rod, a second pitch axis and a mounting seat body; the mounting seat body is in a square box shape, and the transverse support leg can be slidably inserted into the lower part of the mounting seat body; the mounting seat body is rotationally connected to the lateral arm through the first pitch axis, and the second pitch axis is rotationally connected to the lateral arm; the upper end of the vertical threaded rod is rotatably connected to the mounting seat body, and the lower end of the vertical threaded rod is vertically connected to the second pitch axis, and is threadedly engaged with the second pitch axis to adjust the pitch angle of the mounting seat body.

[0021] As an alternative or supplement to the above structure: a square through hole is provided at the lower part of the mounting seat body, and the transverse support leg passes through the square through hole; a long strip of roller needle is provided between the support leg mounting seat and the transverse support leg, and the roller needle is used to reduce the friction resistance between the support leg mounting seat and the transverse support leg.

[0022] The beneficial effects of the present invention are as follows: in this solution, the installation work of the elevation adjustment component is separated from the work of connecting the rail fixing frame to the double-block sleeper, and the two can be carried out simultaneously, and then assembled at the ballastless track foundation, which can avoid the influence of the sequential construction process on the fine adjustment of the position of the double-block sleeper and the installation progress, and improve the efficiency of the double-block sleeper construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of this solution or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0024] Figure 1 This is a state diagram of the double-block sleeper during construction;

[0025] Figure 2 This is a cross-sectional structural diagram of the application scenario of the fine adjustment device in this solution;

[0026] Figure 3This is a cross-sectional structural diagram of another application scenario of the fine adjustment device in this solution;

[0027] Figure 4 It is a cross-sectional structural diagram of the transverse adjustment mechanism;

[0028] Figure 5 It is the coordination structure diagram of the sample rail, rail fixing frame and double-block sleeper;

[0029] Figure 6 This is the coordination structure diagram of the traverse support leg and the support leg mounting seat;

[0030] Figure 7 This is the coordination structure diagram of the rail fixing frame and the transverse support leg;

[0031] Figure 8 yes Figure 7 Schematic diagram of the structure of the local A;

[0032] Figure 9 It is a structural diagram of the elevation adjustment component in this scheme;

[0033] Figure 10 It is a cross-sectional structural diagram of the elevation adjustment assembly for installing the foot pad;

[0034] Figure 11 This is a cross-sectional structural diagram of the height adjustment assembly for installing the height-raising foot.

[0035] In the figure: 1-support leg mounting seat; 11-mounting seat body; 15-needle roller; 16-wall hole; 2-double-block rail sleeper; 3-transverse adjustment mechanism; 31-transverse support leg; 32-transverse screw rod; 33-transverse screw rod sleeve; 34-transmission rod; 35-sample rail; 36-rail fixing frame; 361-fixed crossbar; 362-T-slot; 363-anti-slip pad; 364-positioning hole; 365-wedge block; 37-transverse drive motor; 38-universal connector; 4-high Range adjustment assembly; 41-lateral arm; 42-foot pad; 43-connecting ear; 44-end ring; 45-outer sleeve; 46-dust cover; 47-manual adjustment shaft; 48-height adjustment motor; 49-upper seat plate; 410-lower seat plate; 411-inner sleeve; 412-height adjustment screw; 413-middle mounting hole; 414-front mounting slot; 415-height adjustment threaded sleeve; 416-heightening foot; 417-transverse screw; 5-support rod; 6-ballastless track foundation; 7-concrete pouring layer. DETAILED DESCRIPTION

[0036] The technical solution in this embodiment will be clearly and completely described below in conjunction with the accompanying drawings. The described embodiments are only a part of the embodiments, not all of them. Based on the embodiments in this solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this solution.

[0037] Example 1

[0038] like Figures 1 to 11 As shown, this embodiment designs a fine adjustment device for laying a double-block sleeper 2, including components such as a lateral adjustment mechanism 3, a leg mounting seat 1 and a height adjustment component 4.

[0039] The transverse adjustment mechanism 3 can be detachably connected to the double-block rail sleeper 2, and specifically can adopt the structure described in Example 2; a plurality of transverse support legs 31 are provided on the left and right sides of the transverse adjustment mechanism 3; a transverse drive motor 37 is fixedly installed at the end of the transverse support leg 31 on one side; a transverse screw rod 32 is provided in the transverse support leg 31, and a transverse screw rod sleeve 33 is threadedly sleeved on the transverse screw rod 32; the transverse drive motor 37 is connected to the transverse screw rod 32 for transmission; the transverse screw rod sleeve 33 is fixedly connected to the support leg mounting seat 1 to control the transverse adjustment mechanism 3 to move left and right when the transverse screw rod 32 rotates; the transverse screw rods 32 on the left and right sides of the transverse adjustment mechanism 3 are synchronously linked through the transmission rod 34.

[0040] The elevation adjustment assembly 4 includes a lateral arm 41, an inner sleeve 411 and an outer sleeve 45, and specifically can adopt the structure described in Example 3; the outer sleeve 45 is tubular, the lateral arm 41 is fixed to the outer wall of the outer sleeve 45, and is connected to the support leg mounting seat 1; the inner sleeve 411 is slidably arranged in the outer sleeve 45; the lower end of the inner sleeve 411 extends out of the outer sleeve 45, and the upper end of the inner sleeve 411 is fixedly connected with a height adjustment threaded sleeve 415, and the height adjustment threaded sleeve 415 is threadedly matched with the height adjustment screw rod 412; the height adjustment screw rod 412 is coaxially arranged in the outer sleeve 45, and is driven by the height adjustment motor 48 to control the height of the support leg mounting seat 1.

[0041] The support leg mounting base 1 includes components such as a first pitch axis, a vertical threaded rod, a second pitch axis and a mounting base body 11, and specifically can adopt the structure described in Example 4; the mounting base body 11 is in a square box shape, and the transverse support leg 31 can be slidably inserted into the lower part of the mounting base body 11; the mounting base body 11 is rotatably connected to the lateral arm 41 through the first pitch axis, and the second pitch axis is rotatably connected to the lateral arm 41; the upper end of the vertical threaded rod is rotatably connected to the mounting base body 11, and the lower end of the vertical threaded rod is vertically connected to the second pitch axis, and is threadedly matched with the second pitch axis to adjust the pitch angle of the mounting base body 11.

[0042] The construction method of the structure in this embodiment when in use includes the following steps:

[0043] S1: pre-connect two sample rails 35 with a plurality of bi-block sleepers 2, and pre-connect the rail fixing frame 36 with the sample rails 35;

[0044] S2: Use a lifting device to connect the rail fixing frame 36, and lift the double-block sleeper 2 onto the ballastless track base, and perform preliminary alignment of the double-block sleeper 2;

[0045] S3: A transverse support leg 31 is connected to the left and right ends of each rail fixing frame 36, and a support leg mounting seat 1 is slidably connected to each transverse support leg 31, and each support leg mounting seat 1 is rotatably connected to the elevation adjustment assembly 4;

[0046] S4: The height of the leg mounting base 1 is adjusted by the elevation adjustment assembly 4, and then the pitch angle of the leg mounting base 1 is adjusted so that the inclination of the bi-block sleeper 2 reaches a preset value; then, the lower end of the elevation adjustment assembly 4 is abutted against the ballastless track foundation 6, and the upper end of the elevation adjustment assembly 4 is connected to the ballastless track through the support rod 5 to maintain the state of the bi-block sleeper 2;

[0047] S5: Remove the sling, further adjust the height and pitch angle of the leg mounting bracket 1, and then adjust the centerline position of the rail fixing frame 36 so that the centerline of the double-block sleeper 2 reaches the predetermined position;

[0048] S5: Install formwork on the left and right sides of the bi-block sleeper 2 on the ballastless track foundation 6; pour concrete between the formwork to form a concrete pouring layer 7 to fix the bi-block sleeper 2; after the concrete solidifies, disconnect the connection between the sample rail 35 and the bi-block sleeper 2 and the connection between the elevation adjustment assembly 4 and the ballastless track foundation 6, and use a hoist to lift it away.

[0049] In the above steps, since the elevation adjustment component 4, the transverse support leg 31, the support leg mounting seat 1 and other components do not need to be assembled before the double-block sleeper 2 is lifted, damage to the above components during the lifting process is avoided; at the same time, the operation of lifting the double-block sleeper 2 and the operation of installing the elevation adjustment component 4, the transverse support leg 31, the support leg mounting seat 1 and other components on the ballastless track foundation 6 can be carried out simultaneously, thereby avoiding the problem of slowing down the construction progress due to the requirements of the two operation sequence processes.

[0050] Example 2

[0051] Based on the structure of Example 1, this embodiment designs a specific structure of a transverse adjustment mechanism 3. The transverse adjustment mechanism 3 includes a rail fixing frame 36, a sample rail 35, a transverse drive motor 37, and a transverse support leg 31.

[0052] The sample rail 35 consists of a base, a waist, and a head. The head is located above the base, and the waist is located between the base and head. Two parallel sample rails 35 are used to detachably connect multiple bi-block sleepers 2; each bi-block sleeper 2 is connected to two sample rails 35 at both ends.

[0053] The rail fixing frame 36 includes a fixed crossbar 361, anti-slip pads 363, and wedge blocks 365. The fixed crossbar 361 is a long rod, specifically a square tube. The rail fixing frame 36 can be vertically fixed to the two sample rails 35 at both ends. Specifically, the fixed crossbar 361 is provided with two T-slots, one at the left and right ends of the fixed crossbar 361. The base of the sample rail 35 can extend into the T-slots, and anti-slip pads 363 are provided on the left and right sides of the rail waist. The wedge blocks 365 rest between the anti-slip pads 363 and the sidewalls of the T-slots. The T-slots are perpendicular to the fixed crossbar 361. The bottom width of the T-slots is greater than the slot opening width, and the bottom width of the T-slots is greater than the width of the rail base. The slot opening width of the T-slots can be less than the width of the rail base, and the slot opening width of the T-slots is greater than the thickness of the rail waist. The notch of the T-slot is facing upwards, and the distance between the two T-slots on the fixed crossbar 361 is equivalent to the distance between the two sample rails 35.

[0054] When the rail holder 36 is connected to the sample rail 35, the base of the sample rail 35 extends into the T-slot, and anti-slip pads 363 are placed on the left and right sides of the rail waist. The sides of the anti-slip pads 363 rest against the waist of the sample rail 35. Then, the wedge block 365 is inserted between the anti-slip pad 363 and the side wall of the T-slot. The wedge block 365 is hammered with a tool so that one side of the wedge block 365 presses against the anti-slip pad 363 and the other side presses against the side wall of the T-slot. Through these steps, the rail holder 36 is fixedly connected to the sample rail 35.

[0055] The wedge block 365 can be provided with an internally threaded positioning hole 364, and the anti-slip pad 363 with a waist-shaped hole. Screws can then be inserted through the positioning hole 364 and the waist-shaped hole to secure the wedge block 365 against the rail waist, reducing the probability of the wedge block 365 becoming loose. If the wedge block 365 tends to slide along the length of the sample rail 35, the nut portion of the screw can be blocked by the fixing crossbar 361, thereby reducing the probability of the wedge block 365 falling off.

[0056] The two ends of the rail fixing frame 36 are detachably connected with a transverse support leg 31; a support leg mounting seat 1 is provided at each of the two transverse support legs 31; the support leg mounting seat 1 includes a square box-shaped mounting seat body 11, and a square through hole is provided at the lower part of the mounting seat body 11, and the transverse support leg 31 passes through the square through hole; a transverse screw rod 32 is provided in the transverse support leg 31, and a transverse screw rod sleeve 33 is threadedly sleeved on the transverse screw rod 32; the transverse screw rod sleeve 33 is fixedly connected to the mounting seat body 11; a transverse drive motor 37 is fixedly installed at the end of one of the transverse support legs 31, and the transverse drive motor 37 is connected to the transverse screw rod 32 for transmission; a transmission rod 34 is provided in the rail fixing frame 36, and the transverse screw rods 32 in the two transverse support legs 31 are synchronously linked through the transmission rod 34. The transmission rod 34 passes through the holes in the middle of the anti-slip pad 363 and the wedge block 365. The end of the transmission rod 34 extends into the traverse leg 31 and is plugged into the end of the traverse screw rod 32. When there are two transmission rods 34 in the rail fixing frame 36, the two transmission rods 34 are connected by a universal connector 38.

[0057] When the two transverse screw rods 32 rotate synchronously, the transverse support legs 31 telescopically move along the square through hole to adjust the centerline position of the double-block sleeper 2.

[0058] Example 3

[0059] Based on the structures of Examples 1-2, this embodiment designs a specific structure of a height adjustment assembly 4. The height adjustment assembly 4 includes a lateral arm 41, an outer sleeve 45, an inner sleeve 411, a height adjustment motor 48, a height adjustment screw 412, a manual adjustment shaft 47, and a lateral arm 41.

[0060] The lateral arm 41 is fixed to the outer side wall of the outer sleeve 45 and is used to connect the sleeper fixing frame, which can be detachably connected to multiple bi-block sleepers 2 to facilitate the positioning and calibration of multiple bi-block sleepers 2 on the ballastless track base.

[0061] The outer sleeve 45 is tubular in shape, with an opening at its lower end. The inner sleeve 411 is also tubular and positioned within the outer sleeve 45. The lower end of the inner sleeve 411 extends outside the outer sleeve 45, slidably engaging with the outer sleeve 45 and capable of continuously extending from the lower end of the outer sleeve 45. An end ring 44 is attached to the lower end of the outer sleeve 45. This ring fits over the inner sleeve 411 and seals the gap between the two sleeves. This prevents impurities such as concrete from entering the outer sleeve 45 and affecting the normal telescopic movement of the inner sleeve 411.

[0062] The lower end of the inner sleeve 411 extends outside the outer sleeve 45 and is detachably connected to a foot pad 42 or a heightening foot 416. Connecting ears 43 are provided on the upper ends of the foot pad 42, the upper ends of the heightening foot 416, and the outer sides of the lower end of the inner sleeve 411. The two connecting ears 43 are connected by bolts, allowing the inner sleeve 411 to connect to the foot pad 42 or the heightening foot 416. When the inner sleeve 411 is long enough for its lower end to rest against the datum surface of the ballastless track base, the foot pad 42 is connected to the lower end of the inner sleeve 411 and rests against the datum surface. If the inner sleeve 411 is not long enough, the heightening foot 416 can be connected to the lower end of the inner sleeve 411, thereby resting the foot pad 42 against the datum surface of the ballastless track base. A transverse screw rod 417 is vertically connected to the height-raising foot 416 , and the two are threadedly matched. The transverse screw rod 417 can abut against the inner side of the ballastless track base to facilitate alignment.

[0063] A height adjustment threaded sleeve 415 is fixedly connected to the upper end of the inner sleeve 411 and threadedly engages with a height adjustment screw 412. The height adjustment screw 412 is coaxially disposed within the outer sleeve 45 and its upper end is drivingly connected to a height adjustment motor 48. The manual adjustment shaft 47 is drivingly connected to the rotating shaft of the height adjustment motor 48. The rotating shaft of the height adjustment motor 48 can be coaxially connected to the manual adjustment shaft 47 and the height adjustment screw 412 to save horizontal space.

[0064] The height adjustment motor 48 is fixed to the upper end of the outer sleeve 45. A dust cover 46 is installed outside the height adjustment motor 48. The manual adjustment shaft 47 is also located within the dust cover 46, with the upper end of the manual adjustment shaft 47 extending upward from the dust cover 46. The dust cover 46 effectively prevents dust and concrete from seeping in and affecting the normal operation of the height adjustment motor 48. The upper end of the outer sleeve 45 is fixedly connected to the lower seat plate 410. The lower edge of the dust cover 46 is sealed to the edge of the lower seat plate 410. A sealing ring is installed in the gap between the dust cover 46 and the manual adjustment shaft 47. An upper seat plate 49 is installed above the height adjustment motor 48 and is fixedly connected to the dust cover 46. The manual adjustment shaft 47 is connected to the center of the upper seat plate 49 via a bearing. The upper and lower seat plates 49 and 410 effectively improve the installation stability of the manual adjustment shaft 47 and the height adjustment motor 48, extending their service life and smooth adjustment.

[0065] The lateral arms 41 include two lateral arms 41 spaced apart and arranged horizontally. The space between the lateral arms 41 is used to mount the ends of the leg mounts 1. The lateral arms 41 are provided with central mounting holes 413 and front mounting slots 414. These mounting holes and front mounting slots 414 facilitate the connection between the leg mounts 1 and the lateral arms 41.

[0066] Example 4

[0067] Based on the structures of embodiments 1-3, this embodiment designs a support leg mounting base 1 that is convenient for adjusting the tilt angles of the left and right sides of the rail fixing frame 36. Each rail fixing frame 36 has a detachable transverse support leg 31 at both ends.

[0068] The leg mount includes a mount body 11, a first pitch axis, a vertical threaded rod, and a second pitch axis. The mount body 11 is box-shaped, with a square through-hole at its lower portion extending through the left and right sides of the leg mount 1. The first pitch axis is located at one end of the mount body 11, and the second pitch axis is located at the other end. The vertical threaded rod has a spherical upper end and is rotatably connected to the mount body 11. The lower end of the vertical threaded rod is perpendicularly connected to the second pitch axis and engages with the second pitch axis through a threaded engagement.

[0069] A needle roller 15 is disposed between the top wall of the transverse leg 31 and the upper wall of the square through hole, and a needle roller 15 is also disposed between the bottom wall of the transverse leg 31 and the lower wall of the square through hole. In the above structure, since the transverse adjustment mechanism 3 contacts the leg mounting base 1 only through the transverse leg 31, the contact area between the two can be reduced, thereby reducing frictional resistance, as in the prior art patented technology with publication number CNA. At the same time, the needle roller 15 is disposed between the transverse leg 31 and the leg mounting base 1. During the transverse movement of the transverse leg 31, the needle roller 15 rolls laterally, thereby effectively reducing frictional resistance, reducing the difficulty of lateral position adjustment, and improving adjustment accuracy.

[0070] The transverse screw 32 is mounted within the transverse leg 31. The end of the transverse screw 32 is connected to the transverse leg 31 via a bearing, allowing the transverse screw 32 to rotate within the transverse leg 31 without moving relative to the transverse leg 31. A transverse screw sleeve 33 is threaded onto the transverse screw 32 and fixedly connected to the mounting base body 11. Rotation of the transverse screw 32 controls the telescopic movement of the transverse leg 31 along the square through-hole. The sidewalls of the transverse leg 31 are provided with elongated wall holes 16, at which the transverse screw sleeve 33 is fixedly connected to the mounting base body 11.

[0071] The above embodiments are merely examples for the purpose of illustrating the present invention clearly and are not intended to limit the embodiments. It is not necessary and impossible to enumerate all embodiments here. Obvious changes or modifications derived therefrom are still within the scope of protection of this technology.

Claims

1. A fine adjustment method for laying a double-block sleeper, characterized by: The following steps are involved: S1: pre-connecting two sample rails (35) to a plurality of double-block sleepers (2), and pre-connecting a rail fixing frame (36) to the sample rails (35); S2: Use a lifting device to connect the rail fixing frame (36), and lift the double-block sleeper (2) onto the ballastless track base, and perform preliminary alignment of the double-block sleeper (2); S3: A transverse support leg (31) is connected to the left and right ends of each rail fixing frame (36), a support leg mounting seat (1) is slidably connected to each transverse support leg (31), and each support leg mounting seat (1) is rotationally connected to the elevation adjustment assembly (4); S4: The height of the leg mounting seat (1) is adjusted by the elevation adjustment component (4), and then the pitch angle of the leg mounting seat (1) is adjusted so that the inclination of the double-block sleeper (2) reaches a preset value; then, the lower end of the elevation adjustment component (4) is abutted against the ballastless track foundation (6), and the upper end of the elevation adjustment component (4) is connected to the ballastless track through the support rod (5) to maintain the state of the double-block sleeper (2); S5: dismantling the sling, further adjusting the height and pitch angle of the leg mounting seat (1), and then adjusting the centerline position of the rail fixing frame (36) so that the centerline of the double-block sleeper (2) reaches a predetermined position; S6: Install formwork on the left and right sides of the double-block sleeper (2) on the ballastless track foundation (6); pour concrete between the formwork to form a concrete pouring layer (7) to fix the double-block sleeper (2); after the concrete solidifies, disconnect the connection between the sample rail (35) and the double-block sleeper (2) and the connection between the elevation adjustment component (4) and the ballastless track foundation (6), and use a hoist to lift the sample rail (35), the elevation adjustment component (4) and the transverse support leg (31).

2. The fine-tuning method for laying a double-block sleeper according to claim 1, characterized in that: The height adjustment assembly (4) comprises a lateral arm (41), an inner sleeve (411) and an outer sleeve (45); the outer sleeve (45) is tubular, the lateral arm (41) is fixed to the outer side wall of the outer sleeve (45) and connected to the leg mounting seat (1); the inner sleeve (411) is slidably arranged in the outer sleeve (45); the lower end of the inner sleeve (411) extends out of the outer sleeve (45), and the upper end of the inner sleeve (411) is fixedly connected with a height adjustment threaded sleeve (415), and the height adjustment threaded sleeve (415) is threadedly matched with a height adjustment screw rod (412); the height adjustment screw rod (412) is coaxially arranged in the outer sleeve (45) and driven by a height adjustment motor (48) to control the height of the leg mounting seat (1).

3. The fine adjustment method for laying a double-block sleeper according to claim 2, characterized in that: A manual adjustment shaft (47) is provided above the height adjustment motor (48), and the manual adjustment shaft (47) is in transmission connection with the rotating shaft of the height adjustment motor (48).

4. The fine adjustment device for laying twin-block sleepers according to claim 3, characterized in that: The lower end of the inner sleeve (411) is detachably connected to a foot pad (42) or a height-enhancing foot (416); the upper end of the foot pad (42), the upper end of the height-enhancing foot (416) and the outer side of the lower end of the inner sleeve (411) are provided with connecting ears (43); the two connecting ears (43) are connected by bolts.

5. The fine adjustment method for laying a double-block sleeper according to claim 4, characterized in that: An end ring (44) is connected to the lower end of the outer sleeve (45), and the end ring (44) is sleeved outside the inner sleeve (411) and closes the gap between the outer sleeve (45) and the inner sleeve (411).

6. The fine adjustment method for laying a bi-block sleeper according to claim 5, characterized in that: A dustproof shell (46) is provided outside the height-adjusting motor (48); the manual adjustment shaft (47) is also located inside the dustproof shell (46), and the upper end of the manual adjustment shaft (47) extends upward outside the dustproof shell (46); an upper seat plate (49) is provided above the height-adjusting motor (48), the upper seat plate (49) is fixedly connected to the dustproof shell (46), and the manual adjustment shaft (47) is connected to the center of the upper seat plate (49) through a bearing; the upper end of the outer sleeve (45) is fixedly connected to the lower seat plate (410); the lower edge of the dustproof shell (46) is sealed to the edge of the lower seat plate (410).

7. The fine adjustment method for laying a twin-block sleeper according to any one of claims 1 to 6, characterized in that: A transverse driving motor (37) is fixedly mounted on the end of the transverse supporting leg (31) on one side of the rail fixing frame (36); a transverse screw rod (32) is arranged in the transverse supporting leg (31), and a transverse screw rod sleeve (33) is threadedly sleeved on the transverse screw rod (32); the transverse driving motor (37) is transmission-connected to the transverse screw rod (32); the transverse screw rod sleeve (33) is fixedly connected to the supporting leg mounting seat (1) so as to control the transverse adjustment mechanism (3) to move left and right when the transverse screw rod (32) rotates; the transverse screw rods (32) on the left and right sides of the transverse adjustment mechanism (3) are synchronously linked via a transmission rod (34).

8. The fine adjustment method for laying a bi-block sleeper according to claim 7, characterized in that: The rail fixing frame (36) is vertically fixedly connected to the sample rail (35), and both ends of each rail fixing frame (36) are detachably connected with a transverse support leg (31); when two transmission rods (34) are arranged in the fixed cross bar (361) of the rail fixing frame (36), the two transmission rods (34) are connected via a universal connector (38).

9. The fine adjustment method for laying a bi-block sleeper according to claim 8, characterized in that: The support leg mounting seat (1) comprises a first pitch axis, a vertical threaded rod, a second pitch axis and a mounting seat body (11); the mounting seat body (11) is in a square box shape, and the transverse support leg (31) is slidably inserted into the lower part of the mounting seat body (11); the mounting seat body (11) is rotationally connected to the lateral arm (41) through the first pitch axis, and the second pitch axis is rotationally connected to the lateral arm (41); the upper end of the vertical threaded rod is rotatably connected to the mounting seat body (11), and the lower end of the vertical threaded rod is vertically connected to the second pitch axis and is threadedly matched with the second pitch axis to adjust the pitch angle of the mounting seat body (11).

10. The fine adjustment method for laying a bi-block sleeper according to claim 9, characterized in that: A square through hole is provided at the lower portion of the mounting seat body (11), and the transverse support leg (31) passes through the square through hole; a long strip-shaped roller needle (15) is provided between the support leg mounting seat (1) and the transverse support leg (31), and the roller needle (15) is used to reduce the friction resistance between the support leg mounting seat (1) and the transverse support leg (31).

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