Chain saw and ballastless track roadbed upwarp regulation method

Abstract

The invention discloses a chain saw and a ballastless track roadbed arching renovation method, the chain saw comprises a cutting mechanism, traction mechanisms and a driving mechanism, and the two ends of the cutting mechanism are respectively provided with one traction mechanism and one driving mechanism; the cutting mechanism comprises a mounting seat, a chain plate, a cutting chain, a chain wheel and an adjusting piece; the number of the mounting bases is two, and the two mounting bases are arranged in a spaced mode in the first direction. The mounting seat is in driving connection with the traction mechanism; a chain wheel is rotationally arranged on each of the two mounting seats; the driving mechanism is in driving connection with the chain wheel; the chain plates comprise inner chain plates and outer chain plates, the two ends of each outer chain plate are slidably connected with one inner chain plate in the length direction of the outer chain plate, and the ends, away from the outer chain plates, of the inner chain plates are connected with the mounting base; the adjusting piece is arranged on the outer chain plate, and the adjusting end of the adjusting piece is in driving connection with the two inner chain plates and used for driving the two inner chain plates to be close to or away from each other. And the cutting chain is arranged around the chain plate and is meshed with the two chain wheels. The problems that the cutting width of a chain saw is difficult to adjust and the application range is small are solved.

Description

Technical Field

[0001] This invention relates to the field of track engineering technology, and in particular to a chainsaw and a method for treating the arching of ballastless track subgrade. Background Technology

[0002] In high-speed railway ballastless track structures, cambering of the subgrade is a frequent problem. The main reason for cambering in ballastless track structures is that the fill material used in the subgrade has a certain degree of expansibility, such as quicklime-modified soil and expansive soil. These expansibility fill materials expand and deform after the subgrade is soaked in water, causing the track structure to camber. The treatment technology has obvious defects: fastener adjustment is only applicable to cases with small camber, has limited adjustment capacity, and is labor-intensive and time-consuming.

[0003] In related technologies, chainsaws are typically used to cut the bottom of ballastless tracks, separating the base of the ballastless tracks from the roadbed to form a cutting area. Adjustments are made in the cutting area using jacks. However, the cutting width of chainsaws is usually fixed and difficult to adjust according to actual needs, limiting its applicability. Summary of the Invention

[0004] This invention provides a chainsaw and a method for treating the arching of ballastless track subgrade, which solves the problem that the cutting width of existing chainsaws is usually fixed, making it difficult to adjust according to actual needs and limiting their applicability.

[0005] In a first aspect, the present invention provides a chainsaw, including a cutting mechanism, a traction mechanism and a driving mechanism, wherein the cutting mechanism is provided with a traction mechanism and a driving mechanism at its two ends respectively;

[0006] The cutting mechanism includes a mounting base, chain plate, chain cutter, sprocket, and adjusting component;

[0007] Two mounting seats are provided, and the two mounting seats are spaced apart along a first direction; the mounting seats are driven to the traction mechanism; each of the two mounting seats is rotatably provided with a sprocket; the driving mechanism is driven to the sprocket and is used to drive the sprocket to rotate.

[0008] The chain plate includes an inner chain plate and an outer chain plate. Each end of the outer chain plate is slidably connected to an inner chain plate along its length. The end of the inner chain plate away from the outer chain plate is connected to the mounting base.

[0009] The adjusting member is disposed on the outer chain plate, and its adjusting end is drivenly connected to the two inner chain plates to drive the two inner chain plates to move closer or further apart from each other.

[0010] The chain is arranged around the chain plate and engages with the two sprockets.

[0011] Optionally, the outer chain plate is provided with a groove extending through along the first direction, and one end of the inner chain plate is slidably inserted into the groove; one end of the inner chain plate extending into the groove is provided with an extension along the first direction; the two extensions are staggered in the first direction, and their projections in the second direction at least partially overlap; both of the two extensions are provided with racks on the sides facing each other.

[0012] The adjusting component includes a gear and a limiting component; the gear is rotatably disposed in the slide groove via a rotating shaft; the gear is located between two extensions and meshes with the rack; at least one end of the rotating shaft passes through the side wall of the outer chain plate and has an adjusting hole on its end face; the limiting component is removably inserted into the outer chain plate in a third direction corresponding to the gear and meshes with the gear;

[0013] Among them, the first direction, the second direction, and the third direction are perpendicular to each other.

[0014] Optionally, a limiting hole is provided on one side of the outer chain plate corresponding to the limiting member, and the limiting hole is connected to the slide groove; a slot is provided on the inner side wall of the slide groove corresponding to the limiting hole; the limiting member is adapted to pass through the limiting hole and be embedded in the slot, and the limiting member is provided with a meshing part for meshing with the gear on the side facing the gear.

[0015] Optionally, the limiting member has a threaded hole on one end face near the limiting hole;

[0016] And / or, the adjustment hole is a polygonal hole.

[0017] Optionally, the cutting chain includes a plurality of inner and outer links connected alternately in sequence, with the two ends of the inner links respectively hinged to two of the outer links; the inner links mesh with the sprocket; and the outer links are provided with cutting teeth for cutting.

[0018] Optionally, the outer link has a U-shaped cross-section and a connecting groove; one end of the inner link extends into the connecting groove and is hinged to the two side walls of the connecting groove; the bottom of the connecting groove has multiple tapered protrusions corresponding to the inner link.

[0019] Optionally, the outer chain plate is provided with limiting grooves on both sides in the second direction, and the cut chain is wound around the limiting grooves.

[0020] Optionally, the outer chain plate includes two side plates and two fixing plates located between the two side plates, with the two fixing plates spaced apart along a second direction; the side plates are connected to the fixing plates by fasteners.

[0021] Secondly, the present invention also provides a method for treating the camber of ballastless track subgrade, applied to a chainsaw as described in any of the first aspects, comprising the following steps:

[0022] The structural condition, deformation, and scope of treatment of the ballastless track were inspected and re-measured.

[0023] Traveling trenches are excavated longitudinally on both sides of the upper arch section of the ballastless track subgrade.

[0024] At both ends of the walking groove, excavate installation grooves to a predetermined distance below the base of the ballastless track, and at the same time set a first temporary support in the installation groove, and install the chainsaw in the installation groove;

[0025] The chainsaw's drive mechanism drives the cutting mechanism to cut graded crushed stone laterally, and the chainsaw's traction mechanism drives the cutting mechanism to move longitudinally within the travel groove to cut, thereby separating the base of the ballastless track from the roadbed to form a cutting area.

[0026] A second temporary support is provided in the cutting area below the ballastless track;

[0027] The ballastless track was lowered and corrected.

[0028] The cut area was repaired by grouting, and the excavated area was backfilled.

[0029] Optionally, the step of setting a second temporary support in the cutting area below the ballastless track and the step of correcting the deviation of the ballastless track further includes the following steps:

[0030] Adjustable lateral support mechanisms are provided on both sides of the ballastless track;

[0031] And / or, the specific steps for correcting the deviation of the ballastless track include:

[0032] The ballastless track is measured, basic data of the ballastless track is collected, and the target track landing amount and target lateral deviation correction amount corresponding to the ballastless track are analyzed.

[0033] Multiple sets of lifting devices are set longitudinally at intervals below the ballastless track. According to the target track drop, the sleepers at the corresponding positions of the ballastless track are lifted by the lifting devices, and a pre-set number of steel pads are replaced. After the replacement is completed, the lifting devices are reset, the actual track drop of the sleepers is measured, and the actual track drop is compared with the target track drop.

[0034] Multiple sets of jacking devices are arranged longitudinally at intervals on at least one side of the ballastless track. According to the target lateral deviation, the jacking devices push the sleepers at the corresponding positions of the ballastless track in the lateral direction until the target lateral deviation is achieved.

[0035] And / or, grouting repair of the cut area and backfilling of the excavated area specifically includes the following steps:

[0036] The cutting area is cleaned, and the structural condition of the ballastless track is confirmed to meet the requirements.

[0037] The cut area is sealed and filled with grout;

[0038] After grouting is completed, the excavated area is backfilled.

[0039] The technical solution of the present invention has at least the following advantages:

[0040] In this invention, the two inner chain plates are driven to move closer or further apart on the outer chain plate by an adjusting component, thereby adjusting the distance between the mounting bases, i.e., the distance between the two sprockets, and thus the tension of the cutting chain. This allows for adjustment according to actual needs. Alternatively, the distance between the two sprockets can be adjusted according to the cutting width, and a longer cutting chain can be fitted onto the chain plate, making it widely applicable. During operation, the sprockets can be driven to rotate by a drive mechanism, which in turn drives the cutting chain to rotate for cutting. Simultaneously, the cutting mechanism is pulled to move as a whole by a traction mechanism, thus achieving the cutting of graded crushed stone. This invention can be applied to the cutting of graded crushed stone under the ballastless track during the arching treatment of ballastless track subgrade, achieving the separation of the ballastless track base from the subgrade, facilitating track lowering and deviation adjustment. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of a chainsaw from a first-view perspective provided in an embodiment of the present invention;

[0043] Figure 2 for Figure 1 Sectional view at point AA;

[0044] Figure 3 This is a schematic diagram of a chainsaw from a second perspective, provided in an embodiment of the present invention;

[0045] Figure 4 for Figure 3 Enlarged view of point B in the image;

[0046] Figure 5 This is a schematic diagram of the structure of the inner chain plate and the adjusting component provided in an embodiment of the present invention;

[0047] Figure 6 for Figure 5 Enlarged view of point C in the image;

[0048] Figure 7 This is a schematic diagram of the structure of the outer link provided in the embodiment of the present invention from a third perspective;

[0049] Figure 8 This is a schematic diagram of the structure of the outer link provided in the embodiment of the present invention from a fourth perspective;

[0050] Figure 9 This is a schematic diagram of the structure of the inner link provided in the embodiment of the present invention from a third perspective;

[0051] Figure 10 This is a flowchart of the method for treating the arching of ballastless track subgrade provided in this embodiment of the invention;

[0052] Figure 11 This is the first schematic diagram of the construction of the ballastless track subgrade arching treatment method provided in this embodiment of the invention;

[0053] Figure 12 This is a second schematic diagram illustrating the construction of the ballastless track subgrade arching treatment method provided in this embodiment of the invention;

[0054] Figure 13 This is the third schematic diagram of the construction of the ballastless track subgrade arching treatment method provided in this embodiment of the invention;

[0055] Figure 14 This is a schematic diagram of the arrangement of the adjustable lateral support components provided in an embodiment of the present invention;

[0056] Figure 15 This is a layout diagram of the chainsaw cutting process provided in an embodiment of the present invention;

[0057] Figure 16 This is the fourth schematic diagram of the construction of the ballastless track subgrade arching treatment method provided in this embodiment of the invention;

[0058] Figure 17 This is a first structural schematic diagram of the adjustable lateral support assembly provided in an embodiment of the present invention;

[0059] Figure 18 This is a second structural schematic diagram of the adjustable lateral support component provided in an embodiment of the present invention;

[0060] Figure 19 This is a schematic diagram showing the placement position of the double-block mainline ballastless track jack provided in an embodiment of the present invention;

[0061] Figure 20 This is a schematic diagram of the placement position of the ballastless track jack in the turnout area (wire saw and chainsaw cutting area) provided in an embodiment of the present invention;

[0062] Figure 21 This is a schematic diagram showing the placement location of the ballastless track jack in the turnout area (cut-and-cover area) provided in an embodiment of the present invention.

[0063] The attached figures are labeled as follows:

[0064] 1. Mounting base; 2. Chain cutter; 201. Inner link; 202. Outer link; 203. Cutting tooth; 204. Connecting groove; 205. Conical protrusion; 3. Sprocket; 4. Adjusting component; 401. Gear; 402. Limiting component; 403. Adjusting hole; 404. Threaded hole; 5. Inner chain plate; 6. Outer chain plate; 601. Side plate; 602. Fixing plate; 603. Slide groove; 604. Limiting groove; 7. Extension; 8. Rack; 9. Limiting hole; 10. Ballastless track; 11. Travel groove; 12. Mounting groove; 13. First temporary support; 14. Second temporary support; 15. Adjustable lateral support; 16. Reaction pier structure; 17. Lifting device; 18. First sensor assembly. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It should be noted that in the optional embodiments of the present invention, the object information and other related data involved require the permission or consent of the object when the embodiments of the present invention are applied to specific products or technologies, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. That is to say, if the embodiments of the present invention involve data related to the object, it needs to be obtained with the authorization and consent of the object, the authorization and consent of the relevant departments, and in compliance with the relevant laws, regulations, and standards of the country and region. If personal information is involved in the embodiments, the acquisition of all personal information requires the consent of the individual. If sensitive information is involved, the separate consent of the information subject is required, and the embodiments also need to be implemented with the authorization and consent of the object.

[0066] For easier understanding, please refer to Figures 1 to 9In a first aspect, the present invention provides a chainsaw, comprising a cutting mechanism, a traction mechanism, and a driving mechanism. The cutting mechanism has a traction mechanism and a driving mechanism at each end. The cutting mechanism includes a mounting base 1, chain plates, a cutting chain 2, sprockets 3, and an adjusting member 4. Two mounting bases 1 are provided, spaced apart along a first direction. The mounting base 1 is driven to the traction mechanism. A sprocket 3 is rotatably mounted on each of the two mounting bases 1. The driving mechanism is driven to the sprockets 3 to drive their rotation. The chain plates include inner chain plates 5 and outer chain plates 6. An inner chain plate 5 is slidably connected to each end of the outer chain plate 6 along its length direction. The end of the inner chain plate 5 away from the outer chain plate 6 is connected to the mounting base 1. The adjusting member 4 is mounted on the outer chain plate 6, and its adjusting end is driven to the two inner chain plates 5 to drive them closer together or further apart. The cutting chain 2 surrounds the chain plates and meshes with the two sprockets 3.

[0067] It should be noted that the chain plate is located between the two mounting seats 1 and is set along the straight line where the centers of the two sprockets 3 are located; the chain plate is set along the first direction.

[0068] In this embodiment, during installation, the outer chain plate 6 is connected to two mounting seats 1 via two inner chain plates 5. Simultaneously, the cut chain 2 is wound around the chain plate, and both ends of the cut chain 2 mesh with two sprockets 3. Then, the two inner chain plates 5 can be driven to move closer or further apart on the outer chain plate 6 via the adjusting component 4, thereby adjusting the distance between the mounting seats 1, i.e., the distance between the two sprockets 3, and thus adjusting the tension of the cut chain 2. This allows for adjustment according to actual needs. Alternatively, the distance between the two sprockets 3 can be adjusted according to the cutting width, and a longer cut chain 2 can be fitted onto the chain plate, making it widely applicable. During operation, the sprockets 3 can be driven to rotate via the driving mechanism, thereby rotating the cut chain 2 for cutting. Simultaneously, the cutting mechanism is pulled to move as a whole via the traction mechanism, coordinating the cutting of graded crushed stone. This method can be applied to the cutting of graded crushed stone below the ballastless track 10 during the arching treatment of the ballastless track 10 subgrade, achieving separation of the ballastless track 10 base from the subgrade, facilitating track lowering and deviation adjustment.

[0069] Specifically, the sprocket 3 is rotatably mounted on the mounting base 1 via a bearing housing.

[0070] In one embodiment, such as Figures 2 to 6As shown, a groove 603 is provided through the outer chain plate 6 along the first direction, and one end of the inner chain plate 5 is slidably inserted into the groove 603; one end of the inner chain plate 5 extending into the groove 603 is provided with an extension 7 along the first direction; the two extensions 7 are staggered in the first direction, and their projections in the second direction at least partially overlap; a rack 8 is provided on the side of each of the two extensions 7 facing each other; the adjusting member 4 includes a gear 401 and a limiting member 402; the gear 401 is rotatably disposed in the groove 603 via a rotating shaft; the gear 401 is located between the two extensions 7 and meshes with the rack 8; at least one end of the rotating shaft passes through the side wall of the outer chain plate 6 and is provided with an adjusting hole 403 on its end face; the limiting member 402 is detachably inserted into the outer chain plate 6 along the third direction corresponding to the gear 401 and meshes with the gear 401; wherein, the first direction, the second direction and the third direction are perpendicular to each other.

[0071] It should be noted that the axis is set along a third direction.

[0072] In this embodiment, one end of the inner chain plate 5 is slidably inserted into the groove 603 of the outer chain plate 6, and the extension 7 meshes with the gear 401 in the groove 603. The shaft of the gear 401 passes through the side wall of the outer chain plate 6, so that a tool can be inserted into the adjustment hole 403 to drive the gear 401 to rotate. When adjustment is required, the limiting member 402 is first removed from the outer chain plate 6. When it is necessary to adjust the two inner chain plates 5 to be closer to each other, the gear 401 can be rotated so that the gear 401 engages with the rack 8. The two extensions 7 move closer to each other, thereby causing the two inner chain plates 5 to move closer together, and the overall length of the chain plates becomes shorter. Conversely, when it is necessary to adjust the two inner chain plates 5 to move further apart, the gear 401 can be rotated in the opposite direction, so that the gear 401 cooperates with the rack 8 to drive the two extensions 7 to move further apart, thereby causing the two inner chain plates 5 to move further apart, and the overall length of the chain plates becomes shorter. After the adjustment is completed, the limiting member 402 can be re-inserted onto the outer chain plate 6 to limit the gear 401 and prevent it from loosening.

[0073] In one embodiment, such as Figure 4 and Figure 6 As shown, a limiting hole 9 is provided on one side of the outer chain plate 6 corresponding to the limiting member 402, and the limiting hole 9 is connected to the slide groove 603; the inner side wall of the slide groove 603 is provided with a slot corresponding to the limiting hole 9; the limiting member 402 is adapted to pass through the limiting hole 9 and is embedded in the slot, and the side of the limiting member 402 facing the gear 401 is provided with a meshing part for meshing with the gear 401.

[0074] In this embodiment, a limiting hole 9 is provided only on one side of the outer chain plate 6, and a slot is provided on the side wall of the slide 603 corresponding to the limiting hole 9. After the gear 401 is adjusted, the limiting member 402 is inserted into the slide 603 through the limiting hole 9 and meshes with the gear 401. One end of the limiting member 402 is engaged with the slot for limitation, and the other end is limited in the limiting hole 9 to prevent the gear 401 from rotating. During cutting, the limiting hole 9 can be placed facing upward to prevent the limiting member 402 from falling off along the limiting hole 9 during the cutting process.

[0075] In one embodiment, such as Figure 4 and Figure 6 As shown, the limiting member 402 has a threaded hole 404 on one end face near the limiting hole 9.

[0076] In this embodiment, a threaded hole 404 is provided on the limiting member 402 so that an external tool can be threaded into the threaded hole 404 during removal, so that the limiting member 402 can be removed.

[0077] In one embodiment, such as Figure 4 and Figure 6 As shown, the adjustment hole 403 is a polygonal hole.

[0078] In this embodiment, the adjustment hole 403 is set as a polygonal hole to facilitate rotational adjustment, for example, it is set as an internal hexagon to facilitate adjustment with tools, thereby improving the convenience of adjustment.

[0079] In one embodiment, such as Figures 7 to 9 As shown, the cutting chain 2 includes multiple inner links 201 and outer links 202 connected alternately in sequence. The two ends of the inner links 201 are respectively hinged to two outer links 202; the inner links 201 mesh with the sprocket 3; and the outer links 202 are provided with cutting teeth 203 for cutting.

[0080] In this embodiment, the cut chain 2 is formed by connecting and enclosing inner link 201 and outer link 202. The two ends of each inner link 201 are respectively hinged to the ends of two adjacent outer link 202 to facilitate rotation. Cutting teeth 203 are provided on the outer link 202 to facilitate cutting.

[0081] In one embodiment, such as Figure 8 As shown, the outer link 202 has a U-shaped cross section and a connecting groove 204; one end of the inner link 201 extends into the connecting groove 204 and is hinged to the two side walls of the connecting groove 204; the bottom of the connecting groove 204 has multiple tapered protrusions 205 corresponding to the inner link 201.

[0082] In this embodiment, a connecting groove 204 is provided in the outer link 202 to facilitate hinged connection with the inner link 201 for rotation. A conical protrusion 205 is provided at the bottom of the groove of the outer link 202 corresponding to the inner link 201. This allows the inner link 201 to cooperate with the conical protrusion 205 to squeeze and break the stone fragments that have fallen into the gap between the outer link 202 and the inner link 201 during rotation. This prevents the stone fragments from getting stuck between the inner link 201 and the outer link 202, improves the smoothness of rotation, and extends the service life.

[0083] Specifically, the outer link 202 and the inner link 201 are made of alloy materials to improve the overall structural strength and service life.

[0084] In one embodiment, such as Figure 2 As shown, the outer chain plate 6 has limiting grooves 604 on both sides in the second direction, and the cut chain 2 is wound in the limiting grooves 604.

[0085] In this embodiment, limiting grooves 604 are provided on both sides of the outer chain plate 6, so that the cut chain 2 is at least partially placed in the limiting groove 604 near the inner side, and the limiting groove 604 extends out of the outer side, so that the cut chain 2 can be wrapped around the limiting groove 604 for limiting, preventing the cut chain 2 from leaving the limiting groove 604 during the cutting process and maintaining stability during the cutting process.

[0086] In one embodiment, such as Figure 2 As shown, the outer chain plate 6 includes two side plates 601 and two fixing plates 602 located between the two side plates 601. The two fixing plates 602 are spaced apart along the second direction. The side plates 601 are connected to the fixing plates 602 by fasteners.

[0087] In this embodiment, the outer chain plate 6 is formed by the side plate 601 and the fixing plate 602 enclosed by fasteners (such as bolts or screws), which facilitates installation and disassembly.

[0088] The specific working principle of the chainsaw provided in this embodiment is as follows: During installation, the outer chain plate 6 is connected to two mounting seats 1 respectively through two inner chain plates 5. At the same time, the cut chain 2 is wound around the chain plate, and the two ends of the cut chain 2 are engaged with two sprockets 3. Then, according to actual needs, the gear 401 is rotated by inserting a tool into the adjustment hole 403. The gear 401 then drives the rack 8 to move the two inner chain plates 5 closer to each other or further away on the outer chain plate 6, thereby adjusting the distance between the mounting seats 1. After the adjustment is completed, the limiting member 402 is engaged in the limiting hole 9, so that the limiting member 402 is engaged with the gear 401 for fixed positioning. This allows for adjustment of the distance between the two sprockets 3, which in turn adjusts the tension of the cutting chain 2. The distance between the two sprockets 3 can also be adjusted according to the cutting width, and a longer cutting chain 2 can be fitted onto the chain plate, making it widely applicable. During operation, the sprockets 3 are driven to rotate via a drive mechanism, which in turn drives the cutting chain 2 to rotate for cutting. Simultaneously, a traction mechanism pulls the entire cutting mechanism to move, coordinating the cutting of graded crushed stone. It can be applied to cutting graded crushed stone below the ballastless track 10 during the arching treatment of the ballastless track 10 subgrade, achieving separation of the ballastless track 10 base from the subgrade for easier track lowering and correction. This solves the problem that existing chainsaws typically have a fixed cutting width, making it difficult to adjust according to actual needs and limiting their applicability.

[0089] Please see Figures 10 to 21 Secondly, the present invention also provides a method for correcting the arching of the ballastless track subgrade, applied to a chainsaw as described in any embodiment of the first aspect, comprising the following steps:

[0090] Step S1: Inspect and re-measure the structural condition, deformation, and treatment range of the ballastless track 10.

[0091] In this embodiment, before the operation, the structural state, deformation and treatment range of the ballastless track 10 need to be checked and re-measured to ensure accurate construction location and quantity during construction. Construction can only proceed after verification and confirmation. The cutting range should be marked, the waste soil transportation route and storage site should be planned, the location of underground cables within the construction impact range should be confirmed and explored, and the location of underground cables should be marked after they are discovered. The chainsaw needs to be hoisted using special hoisting equipment and transported to the site by transportation equipment such as flatbed carts.

[0092] Step S2: Excavate the running trench 11 longitudinally on both sides of the upper arch section of the ballastless track 10 roadbed.

[0093] In this embodiment, as Figure 11As shown, the sealing layer can be measured and marked first, and then cut outwards along the base edge at the shoulder of both sides of the ballast track. The cutting width is preferably 0.65-0.8m. The sealing layer between the lines is completely removed. Then, the subgrade surface layer is excavated longitudinally along the base to both sides using an electric pick and impact drill. The excavation depth is 0.25m. After the excavation is completed, a mortar waterproof layer is constructed in time to form the walking groove 11, so that the chainsaw traction mechanism can travel in the walking groove 11 and drive the cutting mechanism to cut. To facilitate construction, a working groove can be set up at the same time to facilitate the excavation of the walking groove 11. At the same time, the chainsaw's walking groove 11 and the underground section and working groove are directly transitioned by steps.

[0094] Step S3: Excavate the installation grooves 12 at both ends of the walking groove 11 to a predetermined distance below the base of the ballastless track 10, and at the same time set the first temporary support 13 in the installation groove 12, and install the chainsaw in the installation groove 12.

[0095] It should be noted that the mounting slots 12 on both sides of the ballastless track 10 are horizontally connected to facilitate the installation of the cutting mechanism.

[0096] In this embodiment, as Figure 12 and Figure 13 As shown, installation trenches 12, 1.3m wide and 1.0m deep, are excavated transversely within the subgrade at 10m intervals along the longitudinal direction of the track (the location may be determined based on actual conditions on site, or the existing underground excavation trenches on both sides may be utilized). The trench walls on the shoulder side are sloped at a ratio of 1:0.5, and the trenches between tracks are excavated vertically. A 0.3m*0.3m*0.4m sump is excavated at the bottom of the installation trench 12, and a waterproof layer is applied using mortar. Before the end of the track maintenance window, a first temporary support 13 should be installed in the installation trench 12 to ensure the stability of the ballastless track 10.

[0097] Step S4: The chainsaw's drive mechanism drives the cutting mechanism to cut graded crushed stone in the transverse direction, and the chainsaw's traction mechanism drives the cutting mechanism to move longitudinally within the travel groove 11 to cut, so as to separate the base of the ballastless track 10 from the roadbed to form a cutting area.

[0098] In this embodiment, a chainsaw is installed in the mounting slot 12, such that the chainsaw's cutting mechanism (i.e., chain cutter 2) is horizontally positioned within the mounting slot 12, and the two sets of traction mechanisms correspond to the positions of the two side travel slots 11. The two sets of traction mechanisms can be fixed to the pre-set steel pipe concrete or anchor bolt hooks at the front end with steel ropes. During operation, the drive mechanism is activated, and the cutting mechanism cuts the surface layer of the subgrade bed under the base of the ballastless track 10 under the drive mechanism. During cutting, the steel ropes in the two sets of traction mechanisms retract, driving the cutting mechanism along the travel slot 11 towards... The position of the pile is moved, and at the same time, the chain cutter 2 carries the graded crushed stone under the base to the outside of the ballastless track 10, thereby gradually separating the base of the ballastless track 10 from the roadbed, thus forming a cutting area under the ballastless track 10; after the cutting is completed and the track bed is cleaned, water retaining edges are constructed on both sides of the base of the ballastless track 10 in a timely manner to prevent rainwater from flowing into the excavation area and affecting subsequent adjustment operations. A rail flatbed crane can be used in conjunction with small hoisting equipment and chainsaws for loading, unloading and transfer. During the operation of the hoisting equipment, the distance between the hoisting equipment and the contact wire should be greater than 2m to ensure safety.

[0099] Step S5: Set up a second temporary support 14 in the cutting area below the ballastless track 10.

[0100] It should be noted that, as Figures 15 to 18 As shown, the second temporary support 14 is located below the rail support platform, with a longitudinal spacing of approximately 0.65m (the longitudinal spacing of temporary supports at local jack installation locations can be increased to 1m, but the total number of supports must remain unchanged). The supports should be placed horizontally and subjected to uniform force to ensure the stability of the track structure.

[0101] In this embodiment, the preferred cutting thickness of the base bed surface is 140-200mm. After the chainsaw hollows out the graded crushed stone below the base, a second temporary support 14 is promptly installed on the track at the corresponding base bed location directly below the left and right rails to prevent deformation of the ballastless track 10 due to lack of bottom support, ensuring stability. The distance between the support and the cutting surface is no more than 3 meters. After cutting is completed on the same day, temporary supports must be installed within the aforementioned 3-meter range. During the longitudinal cutting process along the line, the graded crushed stone is promptly cleared and removed.

[0102] Step S6: Correct the deviation of the ballastless track 10.

[0103] In this embodiment, as Figures 19 to 21 As shown, after the cutting area is formed below the ballastless track 10, the corresponding ballastless track 10 in the corresponding area lacks a corresponding connection point, so as to facilitate adjustment. The cutting area can be used to correct the deviation of the ballastless track 10 to achieve adjustment.

[0104] Step S7: Grout the cut area for repair and backfill the excavated area.

[0105] In this embodiment, after the ballastless track 10 is lowered and corrected, the cut area is grouted for repair and the excavated area is backfilled to ensure stable operation.

[0106] In this embodiment, preparatory work is first carried out before the operation. The structural state, deformation, and treatment range of the ballastless track 10 are inspected and re-measured to ensure accurate construction location and quantities. Construction can only proceed after verification. The cutting range is marked, the waste soil transportation route and storage site are planned, and the location of underground cables within the construction impact range is confirmed and explored. The location of underground cables should be marked after they are discovered. The chainsaw needs to be hoisted using special lifting equipment and transported to the site using transportation equipment such as flatbed carts. Then, according to the construction location and corresponding markings, the running trench 11 is excavated longitudinally on both sides of the upper arch section of the ballastless track 10 subgrade. At the same time, a first temporary support 13 is set in the installation trench 12 at both ends to a predetermined distance below the base of the ballastless track 10. A chainsaw is then installed in the installation trench 12. The chainsaw's drive mechanism drives the cutting mechanism to cut the graded crushed stone in the transverse direction. The chainsaw's traction mechanism drives the cutting mechanism to move longitudinally in the travel trench 11 to cut, thereby separating the base of the ballastless track 10 from the roadbed to form a cutting area. After the cutting is completed, a second temporary support 14 is set in the cutting area below the ballastless track 10. Then, the ballastless track 10 can be lowered and corrected. After the correction is completed, the cutting area is grouted and repaired, and the excavated area is backfilled to ensure stable operation.

[0107] Specifically, the first temporary support 13 includes a mechanical self-locking support device (e.g., a jack). After horizontal excavation, a 50t mechanical self-locking support device is used for vertical support. During support, a steel pad plate is placed on top of the jack. The support positions are respectively set directly below the rails of the ballastless track 10. Preferably, a 0.4m×0.4m concrete pad block with a thickness of 10-20cm and a 20mm thick steel pad plate are respectively placed at the bottom and top of the two jacks for vertical support.

[0108] Specifically, the first temporary support 13 also includes an adjustable steel support. After the installation trench 12 is excavated laterally, the adjustable steel support can be set to replace the jack for fixed support. At the same time, support blocks and steel plates are set on the top of the adjustable steel support for support, and a concrete foundation is set at the bottom of the adjustable steel support to improve the stability of the support.

[0109] Specifically, the second temporary support 14 is composed of precast concrete blocks, steel plates and adjustable supports. The support is 0.25m long along the track direction and 0.4m long laterally (0.5m long for temporary supports in turnout sections).

[0110] In one embodiment, the following steps are included between step S5 and step S6:

[0111] Adjustable lateral support mechanisms are installed on both sides of the ballastless track 10.

[0112] In this embodiment, as Figure 14 , Figure 17 and Figure 18 As shown, an adjustable lateral support mechanism is installed on the shoulder along the longitudinal direction of the line within the renovation area to laterally limit the structure of the ballastless track 10 during the renovation period; the lateral support mechanism can be appropriately adjusted on-site according to the actual situation to correct the lateral deviation of the ballastless track 10.

[0113] Specifically, such as Figure 18 As shown, the lateral support mechanism includes an adjustable lateral support member, which is fixed on the shoulder of the ballastless track 10, and its output end horizontally abuts against the ballastless track 10 to limit the ballastless track 10 in the lateral direction and improve stability.

[0114] Specifically, such as Figure 17 As shown, the lateral support mechanism includes a reaction pier structure 16 cast longitudinally on the shoulder. Adjustable lateral support members are fixed on the reaction pier structure 16. The reaction pier structure 16 ensures the lateral stability of the roadbed in the surrounding area within the treatment range during construction and provides a support structure for the adjustable lateral support members. In addition, the lateral deviation of the ballastless track 10 can also be adjusted through the adjustable lateral support members.

[0115] Specifically, the adjustable lateral support is not specifically limited and can be adjusted using existing screw, hydraulic, or oil-pressure adjustment devices, such as hydraulic rods or cylinders, or jacks. If screw adjustment cannot ensure tightness between the adjustable lateral support and the track bed slab, hardwood boards and steel plates can be inserted between the adjustable lateral support and the track bed slab to ensure firm and reliable fixing and to ensure the structural stability of the ballastless track 10 throughout the construction period.

[0116] In one embodiment, step S6 specifically includes the following steps:

[0117] Step S601: Measure the ballastless track 10, collect the basic data of the ballastless track 10, and analyze the target landing amount and target lateral deviation amount corresponding to the ballastless track 10.

[0118] A "skylight" refers to a "safe working period" allocated by the railway for maintenance and construction.

[0119] In this embodiment, a measuring trolley (such as a track inspection trolley) can be used to measure the track, investigate the fastener adjustment amount, and collect basic track data. The measurement and investigation range is the correction section and 50m before and after it. The track drop and lateral correction amount at each fastener are calculated and verified to obtain the corresponding target track drop and target lateral correction amount, so as to facilitate construction based on the corresponding target track drop and target lateral correction amount. During construction, the construction sequence of "large before small, elevation before plane" is adopted according to the adjustment amount. The maximum lateral correction amount in a single operation is no more than 5mm; the track drop amount in a single operation is no more than 10mm, and multiple adjustments can be made in one track window. During the initial track laying, the track elevation and alignment are measured in real time to ensure accuracy. Each ballastless track laying is carried out separately, requiring a maintenance window of at least 5 hours. During the first maintenance window for each track, the track shims in the laying area are replaced with pre-reserved shims, and the elevation is lowered to the target elevation. The elevation is then fine-tuned locally during the second maintenance window. Each ballastless track laying operation is controlled to be 40-80 meters long, ensuring smooth alignment before and after the laying section. For sections with localized elevation protrusions, partial laying can be carried out first to ensure overall smoothness of the alignment in the treated section. The ballastless and ballasted track junctions are to be laid on the same day as the overall track laying plan. Track laying operations will begin once personnel, tools, and materials are in place.

[0120] Step S602: Multiple sets of lifting devices 17 are set longitudinally at intervals below the ballastless track 10. According to the target track drop, the sleepers at the corresponding positions of the ballastless track 10 are lifted by the lifting devices 17, and a pre-set number of steel pads are replaced. After the replacement is completed, the lifting devices 17 are reset, the actual track drop of the sleepers is measured, and the actual track drop is compared with the target track drop.

[0121] In this embodiment, before adjustment, the adjustable lateral support assembly can be loosened first, and multiple steel pads of different thicknesses can be pre-placed under the sleepers of the ballastless track 10. Then, according to the target track drop, the sleepers at the corresponding positions of the ballastless track 10 are raised by the lifting device 17 to a certain height, and the pre-set number of steel pads are replaced. After the replacement is completed, the lifting device 17 is reset, and the ballastless track 10 at the corresponding position is lowered back onto the abutting steel pads, so that the actual track drop at the corresponding position meets the target track drop, thereby completing the track drop adjustment. This process is repeated to complete the track drop adjustment of the entire remediation section, so that it meets the requirements.

[0122] Step S603: Multiple sets of jacking devices are arranged longitudinally at intervals on at least one side of the ballastless track 10. According to the target lateral deviation, the jacking devices push the sleepers at the corresponding positions of the ballastless track 10 in the lateral direction until the target lateral deviation is achieved.

[0123] It should be noted that the lateral correction of the ballastless track 10 will be carried out after the track is lowered into place.

[0124] In this embodiment, the jacking device is not specifically limited. The jacking device can also be an adjustable lateral support component. By setting the jacking device to adjust the sleepers of the ballastless track 10 according to the measured target lateral deviation, the sleepers at each position are jacked to meet the requirements to complete the lateral deviation adjustment.

[0125] Specifically, multiple sets of first sensor assemblies 18 are arranged at intervals along the longitudinal direction corresponding to the lifting device 17. The height of each sleeper is detected by the first sensor assemblies 18 to detect the amount of height change.

[0126] Specifically, multiple sets of first sensor assemblies 18 are arranged at intervals along the longitudinal direction corresponding to the lifting device 17. The height of each sleeper is detected by the first sensor assemblies 18 to detect the amount of height change.

[0127] In one embodiment, the specific application process of adjusting the ballastless track 10's descent amount is as follows:

[0128] The track was measured using a measuring trolley, the fastener adjustment amount was investigated, and basic track data was collected. The measurement and investigation range was the correction section and 50m before and after it. The track drop and correction amount at each fastener point were calculated and verified.

[0129] The lateral constraints of the adjustable lateral support components are relaxed in advance, and steel pads of different thicknesses of 0.4m*0.25m are pre-placed at the sleepers. Each sleeper is equipped with one 1mm, 2mm and 5mm steel pad (more can be provided for areas with large local adjustments) for track elevation adjustment. At the same time, on-site surveyors carry out measurement preparation work. For the ballastless track 10-track lowering operation, the track bed slab within the range of 10 (9) sleepers is regarded as a lowering unit. Jacks are placed between the 3rd and 4th sleepers and between the 8th (7th) and 9th (8th) sleepers in each lowering unit, for a total of 4 jacks. One person is assigned to each jack, and one manager is assigned to each lowering unit to carry out lowering measurement. The work of supervising and directing the replacement of steel pads is recorded. Under the command of the work team leader, the jacks of the track lowering team carry out jacking operations simultaneously (jacking principle: synchronous jacking height is less than 10mm, single control point jacking height is less than 5mm, and the jacking amount should be minimized, and pads can be replaced). The jacking height is determined by the loosening of all steel pads under the sleepers of the unit. The steel pads under the track are replaced according to the track lowering amount marked on the sleepers. In the track section of sleeper 1-44# in the turnout area, one or two jacks are set up every four sleepers, and a pair of monitoring sensors are set up every nine sleepers. One person is assigned to each jack, and one manager is assigned to each of the eight jacks to supervise and direct the track lowering amount marking and steel pad replacement.

[0130] Track lowering principle: The second (or eighth) sleeper of each unit slab is used as the reference rail for adjusting the track lowering elevation. The steel plate under the base plate is replaced according to the design lowering amount (the replacement thickness is slightly greater than the lowering amount by 2mm, adhering to the principle of being lower rather than higher). For the filling steel plates under other sleepers outside the reference rail, the thickness should be slightly lower than the filling steel plate at the reference sleeper (exceeding the lowering by 10m), and the lowering should not contact the bottom of the base plate after lowering, which is the control standard to facilitate the later addition of steel plates. For sections with a lowering amount of less than 30mm, the steel plates are replaced in one go. For sections with a lowering amount of more than 30mm, the replacement is carried out in two stages, that is, the first stage lowers the amount by 30mm, and the remaining lowering amount is replaced in the second stage.

[0131] After the steel pad under the reference sleeper is replaced, the jack is slowly lowered until the pressure is completely released. The weight of the ballastless track 10 is then borne by the steel pad under the reference sleeper. The measurement is performed on each sleeper in real time using a measuring trolley, and the result is compared with the target track clearance. If there is no error, the steel pads under the other sleepers are tightened, and the track clearance of that section of ballastless track 10 is completed. Otherwise, the above steps are repeated until the track clearance requirements are met. The data from the measuring trolley is remeasured and verified by the track surveying personnel.

[0132] When the track is lowered at K169+175 and K170+115 on both the up and down directions, manual lowering of the ballasted track area is required simultaneously. The ballasted track area is aligned to ensure that the alignment meets the requirements for train operation after lowering. The main procedures for lowering the track in the ballasted track area are: alignment measurement → manual removal of ballast → lowering of sleepers → ballast backfilling → tamping with a small machine → track bed preparation. After the work is completed, the track bed is manually shaped to ensure that its geometric dimensions meet the following requirements: the top surface width of the track bed is 3.5m, the side slope is 1:1.75, and the ballast shoulder height is 0.15m; the top surface of the track bed at the rail bottom should be 20-30mm lower than the top surface of the sleeper; the middle of the track bed in the concrete sleeper should be filled and not higher than the top surface of the sleeper; the track bed should be kept full, uniform, and neat, and kept compacted as required to prevent sleepers from being suspended; the track bed should be clean, uniform, and full, with distinct ballast edges, forming three lines: one line at the toe of the slope, one line at the ballast shoulder, and one line exposed on the sleeper, with the lines parallel and straight to the rails; there should be no ballast on the shoulder and sleeper surface, and the floating ballast should be compacted, uniform, and full.

[0133] In one embodiment, the specific application process of adjusting the lateral deviation of the ballastless track 10 is as follows:

[0134] (1) Marking the amount of correction: According to the target lateral correction amount, mark the lateral correction amount at each (or at intervals of 1-2) sleepers on the sleepers for easy verification during correction.

[0135] (2) Relaxation of the lateral constraint of the adjustable lateral support component: According to the correction direction, relax the lateral constraint of the adjustable lateral support component between the two lines and reserve enough correction space.

[0136] (3) Installation of dowel bars and transverse dial gauges: According to the direction of track offset, dowel bars (to prevent insufficient reaction force provided by the reaction pier structure 16 during correction, dowel bars are installed between the limit and the roadbed excavation and closure layers and between the base plates of the two lines. Dowel bars between the road and between the lines are installed simultaneously and their cross-sectional positions are consistent), steel plates and jacks are installed. A measuring dial gauge is installed between the two lines. One jack is set every 3 meters along the longitudinal direction, and every 20 meters is a correction unit, and correction operations are carried out simultaneously. Adjustable transverse support components are used as correction reaction force for correction operations. During the correction process, a measuring trolley is used for real-time measurement, supplemented by the use of measuring dial gauges for monitoring. A dedicated person is assigned to calculate and determine the correction amount. During correction, to prevent uneven stress on the ballastless track 10, a combination pad of steel plate and rubber pad is installed between the jack and the base plate of the ballastless track 10. The size is 200mm×200mm×(5-10)mm.

[0137] ④ Correcting the Base Plate: Begin correcting the base plate using jacks; start correction from the position with the largest track offset, proceeding segment by segment from the center outwards until the entire ballastless track 10 structure is corrected; after correction, tighten the adjusting screws on all limit devices to limit the ballastless track 10; during correction, use dial indicators and a measuring trolley to monitor the centerline displacement of the ballastless track 10 simultaneously. Two dial indicator monitoring points are set up for each correction unit for coarse adjustment. The measuring trolley moves back and forth within the construction area to measure, simultaneously monitoring the centerline displacement and the real-time elevation of the correction section, while also observing changes in the track's horizontal level at the correction point; after coarse adjustment, use the trolley to measure each sleeper individually for fine adjustment of the correction value; the correction amount should exceed the design by 1mm as the control target, allowing for rebound; after correction... After completion, limit supports are installed for limiting, and the alignment data within the affected area is measured to ensure that the train operation requirements are met. During the correction process, the ballastless track 10 is observed, and if cracks are found, the jacking operation is stopped immediately. If the monitoring detects a sudden change in centerline displacement or a large change in elevation, the correction operation is stopped. During correction, a measuring trolley is used to monitor the centerline displacement and elevation changes of the ballastless track 10 in real time. If the elevation changes, it needs to be adjusted repeatedly. After the correction is completed, the rail surface elevation of the ballastless track 10 is checked again to ensure that it meets the requirements, and then the vertical steel supports and adjustable transverse support components are locked. After the track is lowered and the correction is completed, mortar bags are promptly laid and filled under the base for support and isolation to prevent changes in the geometric dimensions of the ballastless track 10. After the operation is completed, a measuring trolley is used to measure the track plane and elevation. Only after confirming that there are no errors can the next process be carried out.

[0138] In one embodiment, step S7 specifically includes the following steps:

[0139] Step S701: Clean the cutting area and confirm that the structural condition of the ballastless track 10 meets the requirements.

[0140] In this embodiment, the cutting area is cleaned and the structural condition of the ballastless track 10 is confirmed to meet the requirements, so as to facilitate subsequent grouting and ensure the filling effect and structural strength.

[0141] Step S702: Seal the edges of the cut area and fill it with grout.

[0142] In this embodiment, the overall structural strength is ensured for use by sealing the cut area and filling it with grout.

[0143] Step S703: After grouting is completed, backfill the excavated area.

[0144] In this embodiment, the excavated area is backfilled to avoid affecting subsequent use and to ensure the structural strength of the roadbed around the ballastless track 10.

[0145] In one embodiment, the specific construction process of grouting is as follows:

[0146] (1) Confirmation of track structure status: Before grouting and filling under the base of ballastless track 10, clean the gap under the base again, measure and confirm the geometric status of ballastless track 10, and make local fine adjustments if necessary.

[0147] (2) Edge sealing: Wooden formwork and concrete are used to seal the edges of the base plate. For the vertical formwork edge sealing, formwork and concrete are used. A 1cm gap is left between the formwork edge and the base plate, and the height is 5cm higher than the bottom surface of the base. When sealing the edges, a pair of vent holes are reserved on both sides of the base plate every 2m for venting or grouting. Before grouting, it is confirmed that the reserved arch and the geometric dimensions of the track meet the requirements. In order to facilitate the subsequent wire saw cutting and track construction, a 110mm diameter PVC pipe is horizontally buried under the base every 2m for the later saw rope drilling and segmented core taking. The PVC pipe is 3.4m long and both ends are sealed with plastic bags.

[0148] (3) Grouting and filling: Before grouting and filling the base, conduct material tests under the same construction conditions and record the initial setting time, final setting time, fluidity, etc. If the temperature is too high (low) and the material setting time is too fast (slow), an appropriate amount of retarder (early strength agent) can be added (the amount added is determined by the temperature during the operation and the test); calculate and weigh the amount of polymer cement mortar required for grouting, use a special polymer cement mortar mixer to mix the mortar, and quickly test the workability after mixing. After the test is qualified, the mortar grouting can begin; the grouting and filling must be full, that is, ensure that the overflow of grout at all base edges is higher than the bottom of the base plate. After grouting is completed, the track structure and steel rails are immediately cleaned to prevent overflowing mortar from solidifying and contaminating the ballastless track 10. During the grouting process, the elevation of the ballastless track 10 is monitored with a dial indicator. If the elevation change exceeds 0.5mm, grouting is stopped immediately. After the elevation of the top surface of the track returns to normal, the grouting is moved to the adjacent grouting hole to start grouting. After grouting is completed, non-destructive testing is performed on the filled area, and core samples are drilled at the center of the track every 20m interval for verification. If there are gaps, grouting treatment is carried out.

[0149] In one embodiment, the specific construction process of the waterproof layer is as follows:

[0150] (1) Clean up the excavated and backfilled surfaces between the lines and shoulders, and remove excess concrete from the polymer mortar injection port, the original water collection well, etc.

[0151] (2) Use fine stone concrete to pour the leveling layer. The concrete thickness is 5-8cm. A 1% drainage cross slope is reserved between the lines and towards the middle, a 1% drainage cross slope is reserved between the road sections and outwards, and a 1% drainage longitudinal slope is reserved towards the line collection well.

[0152] (3) After the concrete leveling layer is surface dry, apply the waterproof membrane. Apply the primer and reinstall the polymer-modified bitumen waterproof membrane. Ensure the membrane overlaps on both sides with a 15cm overlap length. During installation, implement baking treatment measures to ensure the membrane is firmly bonded without any voids. The membrane can only be laid when the primer is dry and not sticky to the touch. The membrane should be laid starting from one end. The overlap height at the polymer mortar layer and existing drainage ditches should be no less than 15cm, and hot-melt welding should be used. When laying, ignite a blowtorch to bake the bitumen layer on the bottom of the membrane and the primer on the primer. Baking should be even; once the bitumen layer on the bottom of the membrane has melted, it can be laid forward. The bitumen should be almost flowing and appear black and shiny; excessive heating should not burn through the membrane. Roll and vent the membrane while laying to ensure it is firmly bonded without any voids. At the overlap of the waterproof membrane, the upper and lower layers should be completely heat-fused to ensure a firm bond. Molten bitumen should naturally overflow from the overlap joint. When the membrane is laid to the perimeter of the beam, after rolling, molten bitumen should naturally overflow; this should be smoothed with a scraper or trowel and then sealed. At the drain pipe opening, the waterproof membrane should be cut open, folded over, and firmly bonded to the inner wall of the drain pipe.

[0153] (4) After the waterproof membrane is laid, a sealing layer is applied. That is, a thin polyurethane waterproof layer is applied at the base (polymer mortar backfill layer) and the existing water ditch. The coating height is 5cm and the coating thickness is 1.5mm.

[0154] (5) The waterproof layer of the chain saw cutting section is constructed at the bottom of the walking trough 11. The outer side is a section with a water ditch. The outer side of the waterproof layer is 15cm higher than the bottom of the ditch. When there are no drainage holes in the outer water ditch, 25mm drainage inclined holes are drilled on the wall of the water ditch at 10m intervals.

[0155] (6) Waterproof membrane is laid at the water collection well between the lines to the inner wall of the pipe, ensuring that the overlap is firmly adhered.

[0156] (7) In some sections between the arrival / departure line and the main line ballastless track 10, waterproof membrane cannot be laid. A thin-coat polyurethane waterproof layer with a coating thickness of 1.5mm is used.

[0157] (8) Add water collection wells and horizontal drainage pipes between the lines, with the distance between water collection wells being less than 25m.

[0158] (9) At the water collection well between the lines, the waterproof membrane shall be laid directly to a depth of 10cm below the water collection well and a cross slope of more than 1% shall be maintained to ensure smooth drainage of the waterproof layer.

[0159] (10) The embankment slopes on both sides of the section from K169+080 to K169+203 need to be sealed with concrete. First, the topsoil originally used for planting grass in the existing embankment slope skeleton is excavated to a depth of 0.3m. Then, galvanized steel wire mesh is laid on the slope surface and sealed with C30 concrete to a thickness of 0.3m.

[0160] (11) Grouting repair of cracks in the drainage ditch within the construction area.

[0161] In one embodiment, the specific construction process for backfilling and sealing layer restoration is as follows:

[0162] (1) After the grouting is completed, the concrete pouring of the working trench, the backfilling of graded crushed stone and the restoration of the sealing layer will begin.

[0163] (2) Before backfilling and restoring the sealing layer, the two inter-line water collection wells within the construction area shall be restored to ensure smooth drainage between the lines. Some working trenches shall be backfilled with ordinary C20 concrete material, with the backfill height reaching 20cm below the base and level with the original polymer concrete backfill layer. Ordinary concrete shall be commercial concrete, which shall be transported to the line for backfilling through a ground pump and hose.

[0164] (3) The remaining part below the sealing layer shall be backfilled with graded crushed stone. Before backfilling, the filling surface shall be cleaned and leveled. During backfilling, the backfilling shall be carried out in stages from the small mileage to the large mileage, and the thickness of each loose layer shall not exceed 25cm. The graded crushed stone shall be compacted by manual tamping machine. The bottom shall be compacted before backfilling. Each layer of graded crushed stone shall be tamped three times.

[0165] (4) After backfilling is completed, a waterproof geomembrane is laid on the surface of the crushed stone. After inspection and approval, the sealing layer is poured. The thickness of the sealing layer is 10-20cm.

[0166] (5) Before pouring concrete, the surface should be moistened with water and foam boards should be installed at the joints. During pouring, a drainage cross slope of 2-4% and a longitudinal slope of 5‰ should be set, and an expansion joint (flush with the track bed slab) should be set every 9-10 sleepers. After pouring, the sealing layer concrete should be sprayed with curing agent in a timely manner.

[0167] (6) After the sealing layer is restored, the pre-embedded bolts on the track structure are cut and ground, the holes and cracks on the track structure are repaired and ground with polymer mortar, and the parts of the track structure that have fallen off are repaired with polymer repair materials. The materials and construction process shall be handled in accordance with the requirements of "Repair of Damage to Ballastless Track of High-Speed ​​Railway" (Q / CR802-2020).

[0168] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0169] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0170] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chainsaw, characterized in that, It includes a cutting mechanism, a traction mechanism, and a driving mechanism, with a traction mechanism and a driving mechanism respectively provided at both ends of the cutting mechanism; The cutting mechanism includes a mounting base (1), a chain plate, a cutting chain (2), a sprocket (3), and an adjusting component (4); Two mounting seats (1) are provided, and the two mounting seats (1) are spaced apart along a first direction; the mounting seats (1) are driven to be connected to the traction mechanism; each of the two mounting seats (1) is rotatably provided with a sprocket (3); the driving mechanism is driven to be connected to the sprocket (3) and is used to drive the sprocket (3) to rotate; The chain plate includes an inner chain plate (5) and an outer chain plate (6). Both ends of the outer chain plate (6) are slidably connected to an inner chain plate (5) along its length direction. The end of the inner chain plate (5) away from the outer chain plate (6) is connected to the mounting base (1). The adjusting member (4) is disposed on the outer chain plate (6), and its adjusting end is driven to be connected to the two inner chain plates (5) for driving the two inner chain plates (5) to move closer or further away from each other; The cut chain (2) is arranged around the chain plate and engages with the two sprockets (3).

2. The chainsaw according to claim 1, characterized in that, The outer chain plate (6) is provided with a through groove (603) along the first direction, and one end of the inner chain plate (5) is slidably inserted into the groove (603); one end of the inner chain plate (5) extending into the groove (603) is provided with an extension (7) along the first direction; the two extensions (7) are staggered in the first direction, and their projections in the second direction at least partially overlap; a rack (8) is provided on the side of each of the two extensions (7) facing each other. The adjusting member (4) includes a gear (401) and a limiting member (402); the gear (401) is rotatably disposed in the slide groove (603) via a rotating shaft; the gear (401) is located between two extensions (7) and meshes with the rack (8); at least one end of the rotating shaft passes through the side wall of the outer chain plate (6) and has an adjusting hole (403) on its end face; the limiting member (402) is removably inserted into the outer chain plate (6) in a third direction corresponding to the gear (401) and meshes with the gear (401); Among them, the first direction, the second direction, and the third direction are perpendicular to each other.

3. The chainsaw according to claim 2, characterized in that, One side of the outer chain plate (6) is provided with a limiting hole (9) corresponding to the limiting member (402), and the limiting hole (9) is connected to the slide groove (603); the inner side wall of the slide groove (603) is provided with a slot corresponding to the limiting hole (9); the limiting member (402) is adapted to pass through the limiting hole (9) and is embedded in the slot, and the limiting member (402) is provided with a meshing part for meshing with the gear (401) on the side facing the gear (401).

4. The chainsaw according to claim 3, characterized in that, The limiting member (402) has a threaded hole (404) on one end face near the limiting hole (9). And / or, the adjustment hole (403) is a polygonal hole.

5. The chainsaw according to claim 1, characterized in that, The cutting chain (2) includes a plurality of inner links (201) and outer links (202) connected alternately in sequence. The two ends of the inner links (201) are respectively hinged to the two outer links (202); the inner links (201) mesh with the sprocket (3); and the outer links (202) are provided with cutting teeth (203) for cutting.

6. The chainsaw according to claim 5, characterized in that, The outer link (202) has a U-shaped cross section and a connecting groove (204); one end of the inner link (201) extends into the connecting groove (204) and is hinged to the two side walls of the connecting groove (204); the bottom of the connecting groove (204) has multiple tapered protrusions (205) corresponding to the inner link (201).

7. The chainsaw according to any one of claims 1 to 6, characterized in that, The outer chain plate (6) has limiting grooves (604) on both sides in the second direction, and the cut chain (2) is wound in the limiting grooves (604).

8. The chainsaw according to claim 7, characterized in that, The outer chain plate (6) includes two side plates (601) and two fixing plates (602) located between the two side plates (601), the two fixing plates (602) being spaced apart along a second direction; the side plates (601) are connected to the fixing plates (602) by fasteners.

9. A method for treating camber on ballastless track subgrade, characterized in that, An application to a chainsaw as described in any one of claims 1 to 8, comprising the following steps: The structural condition, deformation and treatment range of the ballastless track (10) were inspected and re-measured; Traveling trenches (11) are excavated longitudinally on both sides of the upper arch section of the roadbed of the ballastless track (10). At the same time, a first temporary support (13) is set in the mounting groove (12) at both ends of the walking groove (11) and the chainsaw is installed in the mounting groove (12). The chainsaw's drive mechanism drives the cutting mechanism to cut graded crushed stone laterally, and the chainsaw's traction mechanism drives the cutting mechanism to move longitudinally within the travel groove (11) to cut, thereby separating the base of the ballastless track (10) from the roadbed to form a cutting area. A second temporary support (14) is provided in the cutting area below the ballastless track (10). The ballastless track (10) is derailed and corrected. The cut area was repaired by grouting, and the excavated area was backfilled.

10. The method for treating camber on ballastless track subgrade according to claim 9, characterized in that, Between setting a second temporary support (14) in the cutting area below the ballastless track (10) and performing track lowering and correction on the ballastless track (10), the following steps are also included: Adjustable lateral support mechanisms are provided on both sides of the ballastless track (10); And / or, the specific steps for correcting the deviation of the ballastless track (10) include: The ballastless track (10) is measured, basic data of the ballastless track (10) is collected, and the target landing amount and target lateral deviation correction amount corresponding to the ballastless track (10) are analyzed. Multiple sets of lifting devices (17) are set longitudinally at intervals below the ballastless track (10). According to the target drop volume, the sleepers at the corresponding positions of the ballastless track (10) are lifted by the lifting devices (17), and a pre-set number of steel pads are replaced. After the replacement is completed, the lifting devices (17) are reset, the actual drop volume of the sleepers is measured, and the actual drop volume is compared with the target drop volume. Multiple sets of jacking devices are arranged longitudinally at least on one side of the ballastless track (10). According to the target lateral deviation, the jacking devices push the sleeper at the corresponding position of the ballastless track (10) in the lateral direction. The jacking devices push the sleeper until the target lateral deviation is reached. And / or, grouting repair of the cut area and backfilling of the excavated area specifically includes the following steps: The cutting area was cleaned, and the structural condition of the ballastless track (10) was confirmed to meet the requirements. The cut area is sealed and filled with grout; After grouting is completed, the excavated area is backfilled.

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