A method of installing a rail expansion device and rail expansion adjuster

Abstract

The application provides a mounting method for mounting a track expansion device and a rail expansion adjuster. The mounting method for mounting the track expansion device and the rail expansion adjuster comprises the following steps: laying a first fixed sleeper group, a movable sleeper group and a second fixed sleeper group of the expansion device; laying a basic rail and a point rail of the rail expansion adjuster, laying the basic rail above the first fixed sleeper group, the movable sleeper group and the second fixed sleeper group, and connecting the point rail with one end of the basic rail; mounting a connecting rod assembly of the expansion device; mounting a fastener system; an auxiliary reinforcing step, connecting all the fixed sleepers and all the movable sleepers within the range of the rail expansion adjuster by using an auxiliary reinforcing structure to form an integral track panel; coarsely adjusting the integral track panel; removing the auxiliary reinforcing structure and pouring concrete. The technical scheme of the application can avoid the displacement or misplacement of the sleepers within the range of the expansion device and the expansion adjuster, and the position of the sleepers does not need to be checked again, so that the construction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of railway bridge technology, and more specifically, to an installation method for installing track expansion joints and rail expansion adjusters. Background Technology

[0002] During the construction of expansion joints and rail expansion adjusters for ballastless tracks on high-speed railway bridges, after bridge deck acceptance, the construction procedure for slab track is as follows: preliminary assessment of subgrade settlement deformation, CPⅢ mesh establishment and assessment, reinforcement arrangement of concrete base, concrete base pouring and formwork removal and curing, concrete base acceptance, construction of isolation layer and rubber pad layer, laying of self-compacting concrete reinforcement mesh, rough laying of track slabs, fine adjustment of track slabs, construction of self-compacting concrete pouring, formwork removal and curing, laying of long rails, and static fine adjustment of track slabs. The construction procedure for double-block ballastless tracks is as follows: subgrade structural settlement assessment, CPⅢ mesh establishment and assessment, construction of support layer, bridge protective layer and bosses, laying of lower reinforcement mesh of track slab, laying of sleepers, assembly of rail panels, rough adjustment of rail panels, laying of upper reinforcement of track slab, installation of formwork, fine adjustment of rail panels, pouring and curing of track slab concrete, removal of formwork, and laying of long rails.

[0003] Currently, in existing technologies, the installation of expansion joints and rail expansion joints is carried out simultaneously with the track slab or rail panel laying stage. Since the fixed and movable sleepers within the range of the expansion joints and rail expansion joints are long concrete sleepers, after the track slab is laid, it is necessary to perform procedures such as checking and maintaining the expansion joint's scissor-fork stretching or compression displacement, basic rail displacement, verifying bolt torque, and bolt pinning on the fixed and movable sleepers within the range of the expansion joints and rail expansion joints. Simultaneously, concrete pouring must be carried out uniformly after the front and rear formwork installation is completed. During this process, because the sleepers within the range of the expansion joints and rail expansion joints are discrete units, they may shift or misalign in the longitudinal and lateral directions due to interference from the on-site working environment and other processes. Before concrete pouring, these sleepers need to be uniformly adjusted back to their preset positions, i.e., a secondary verification of the positions of the fixed and movable sleepers is required. This adds extra work to the construction, prolongs the construction period, and reduces construction efficiency. Summary of the Invention

[0004] The main objective of this invention is to provide an installation method for installing track expansion joints and rail expansion adjusters, in order to solve the problem in the prior art where, during the track panel layout and the laying of expansion joints and rail expansion adjusters, uneven stress causes positional shifts or misalignments of fixed and movable sleepers within the range of the expansion joints and rail expansion adjusters in the longitudinal or lateral directions. This necessitates a secondary check of the positions of the fixed and movable sleepers after the initial rough adjustment and inspection steps, leading to increased workload and reduced construction efficiency.

[0005] To achieve the above objectives, according to one aspect of the present invention, an installation method for installing a track expansion joint and a rail expansion adjuster is provided, comprising: laying a first fixed sleeper group, a movable sleeper group, and a second fixed sleeper group of the expansion joint along a first preset direction, wherein each of the first and second fixed sleeper groups includes multiple fixed sleepers spaced apart along the first preset direction, and the movable sleeper group includes multiple movable sleepers spaced apart along the first preset direction; laying a base rail and a switch rail of the rail expansion adjuster, wherein the base rail is laid above the first fixed sleeper group, the movable sleeper group, and the second fixed sleeper group, such that the base rail covers all fixed sleepers in the first and second fixed sleeper groups and all movable sleepers in the movable sleeper group, and connecting one end of the switch rail to the base rail; and installing the expansion joint. The process involves several steps: First, connecting the connecting rod assembly to the ends of all movable sleepers in the movable sleeper group and connecting both ends of the connecting rod assembly to two adjacent fixed sleepers. Second, installing the fastening system to connect all fixed and movable sleepers within the rail expansion joint range to the stock rail. Third, using auxiliary reinforcement structures to connect all fixed and movable sleepers within the rail expansion joint range to form an integral rail panel. Fourth, coarsely adjusting the rail panel by measuring and adjusting the rail surface height of each fixed and movable sleeper within the rail expansion joint range, and verifying that the gauge of the switch rail meets requirements. Finally, removing the auxiliary reinforcement structures and pouring concrete to integrate all fixed and movable sleepers within the rail expansion joint range into a single concrete structure.

[0006] Furthermore, the auxiliary reinforcement structure includes a first connector and a second connector arranged sequentially along a first preset direction. The auxiliary reinforcement steps include: connecting the first connector to a portion of the fixed sleepers located at the tip of the switch rail within the range of the rail expansion adjuster via a locking member; connecting the second connector to other sleepers within the range of the rail expansion adjuster via a locking member; and connecting the first connector and the second connector via a locking member.

[0007] Furthermore, in the auxiliary reinforcement step, there are at least two auxiliary reinforcement structures, which are arranged sequentially along the first preset direction. All fixed sleepers and all movable sleepers within the range of the rail expansion joint are connected by the at least two auxiliary reinforcement structures. After the auxiliary reinforcement step, the installation method also includes the step of fixing two adjacent auxiliary reinforcement structures together by means of an intermediate connector.

[0008] Furthermore, after the step of removing the auxiliary reinforcement structure, the installation method also includes the step of using a track geometry measuring instrument to detect and fine-tune the geometry of the rail expansion joint.

[0009] According to another aspect of the present invention, a construction method for ballastless track is provided, the construction method comprising: a step of assessing track settlement; a step of installing a base and laying a reinforcing mesh; a step of installing a track expansion joint and a rail expansion adjuster, wherein the installation is performed using the above-described installation method for installing the track expansion joint and the rail expansion adjuster; a step of concrete pouring and formwork removal and curing; and a step of laying long rails.

[0010] Furthermore, when the ballastless track is a double-block ballastless track, the construction method also includes the steps of laying the upper layer of reinforcing steel bars and installing formwork before removing the auxiliary reinforcement structure.

[0011] According to another aspect of the present invention, an auxiliary reinforcement assembly for installing a track expansion joint and a rail expansion adjuster is provided. The auxiliary reinforcement assembly is applied to the above-described installation method for installing the track expansion joint and the rail expansion adjuster. The auxiliary reinforcement assembly includes at least two auxiliary reinforcement structures that are interconnected, and the at least two auxiliary reinforcement structures are arranged sequentially along a first preset direction.

[0012] Furthermore, the auxiliary reinforcement component also includes an intermediate connector for connecting two adjacent auxiliary reinforcement structures. The intermediate connector has two connecting through holes arranged sequentially along a second preset direction. The two adjacent auxiliary reinforcement structures are respectively connected to one of the two connecting through holes. The second preset direction forms an angle with the first preset direction.

[0013] Furthermore, each auxiliary reinforcement structure includes a first connector and a second connector connected sequentially along a first preset direction. The first connector has a first mounting through hole, and the second connector has a second mounting through hole. The first connector is connected to the sleeper located at the tip of the switch rail through the first mounting through hole and a locking member. The sleeper is one of a fixed sleeper and a movable sleeper.

[0014] Furthermore, the relationship between the length L1 of the first connector and the length L2 of the second connector is: L2 = 3L1.

[0015] By applying the technical solution of this invention, after all the fixed sleepers in the first fixed sleeper group and the second fixed sleeper group of the expansion joint and all the movable sleepers in the movable sleeper group, as well as the basic rails and switch rails in the rail expansion adjuster, are laid, an auxiliary reinforcement structure is used to connect all the fixed sleepers and all the movable sleepers within the range of the rail expansion adjuster. That is, the auxiliary reinforcement structure is sequentially connected to all the fixed sleepers in the first fixed sleeper group, all the movable sleepers in the movable sleeper group, and all the fixed sleepers in the second fixed sleeper group to form an integral rail panel. During the coarse adjustment of the expansion joint during construction (e.g., initial assembly of the overall rail panel, tensile testing of connecting rod components, compression displacement testing, bolt torque verification, etc.) and during the expansion and contraction of the main bridge, since all fixed and movable sleepers within the range of the rail expansion joint are connected to form an integral rail panel, there will be no relative movement between them. This avoids the problem of offset or misalignment of fixed and movable sleepers in the longitudinal or lateral directions. Therefore, after the coarse adjustment and inspection steps, there is no need for secondary verification of the positions of the fixed and movable sleepers, improving construction efficiency. Furthermore, after the coarse adjustment of the overall rail panel, the auxiliary reinforcement structure is removed and concrete is poured. This ensures that all fixed and movable sleepers within the range of the rail expansion joint are integrally formed with the concrete, guaranteeing the relative positional relationship between all fixed and movable sleepers. Simultaneously, the removed auxiliary reinforcement structure can be reused, reducing costs. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A process flow diagram of the installation method for installing a track expansion joint and a rail expansion adjuster according to the present invention is shown;

[0018] Figure 2 A process flow diagram of the construction method for ballastless track according to the present invention is shown;

[0019] Figure 3 A schematic diagram of an embodiment of the auxiliary reinforcement component according to the present invention is shown;

[0020] Figure 4 It shows Figure 3 A schematic diagram of the structure of the second connector of the auxiliary reinforcement component;

[0021] Figure 5 It shows Figure 3 A schematic diagram of the structure of the first connector of the auxiliary reinforcement component; and

[0022] Figure 6 It shows Figure 3 A schematic diagram of the intermediate connector of the auxiliary reinforcement component.

[0023] The above figures include the following reference numerals:

[0024] 101. First mounting through hole; 102. Second mounting through hole; 11. First connector; 12. Second connector; 13. Intermediate connector; 131. Connecting through hole. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that the track expansion joint includes movable sleepers, fixed sleepers, connecting rod assemblies, and fastening systems, while the rail expansion adjuster includes stock rails, switch rails, and fastening systems. The track expansion joint and the rail expansion adjuster can significantly reduce the longitudinal interaction force between the bridge and the seamless track, allowing the seamless track to remain relatively stable when the bridge deforms, thereby ensuring the normal operation of the track.

[0027] like Figure 1As shown, an embodiment of the present invention provides an installation method for installing a track expansion joint and a rail expansion adjuster. The installation method includes: laying a first fixed sleeper group, a movable sleeper group, and a second fixed sleeper group along a first preset direction; each of the first and second fixed sleeper groups includes multiple fixed sleepers spaced apart along the first preset direction, and the movable sleeper group includes multiple movable sleepers spaced apart along the first preset direction; laying the base rail and switch rail of the rail expansion adjuster, placing the base rail above the first fixed sleeper group, the movable sleeper group, and the second fixed sleeper group, so that the base rail covers all fixed sleepers in the first and second fixed sleeper groups and all movable sleepers in the movable sleeper group, and connecting one end of the switch rail to the base rail; installing the linkage assembly of the expansion joint, connecting the linkage assembly to... The ends of all movable sleepers in the movable sleeper group are connected, and the two ends of the connecting rod assembly are connected to the two fixed sleepers adjacent to the movable sleeper group; the fastening system is installed, and all fixed sleepers and all movable sleepers within the rail expansion joint range are connected to the stock rail using the fastening system; the auxiliary reinforcement step is carried out, and all fixed sleepers and all movable sleepers within the rail expansion joint range are connected using the auxiliary reinforcement structure to form an integral rail panel; the overall rail panel is roughly adjusted, the rail surface height of each fixed sleeper and each movable sleeper within the rail expansion joint range is measured and adjusted, and the gauge of the switch rail is checked to ensure that it meets the requirements; the auxiliary reinforcement structure is removed, and concrete is poured, so that all fixed sleepers and all movable sleepers within the rail expansion joint range are integrally formed with the concrete.

[0028] It should be noted that "all fixed sleepers and all movable sleepers within the range of the rail expansion joint" refers to all fixed sleepers in the first and second fixed sleeper groups, as well as all movable sleepers in the movable sleeper group.

[0029] It should be noted that "connecting all fixed sleepers and all movable sleepers within the range of the rail expansion joint using auxiliary reinforcement structures" means that the auxiliary reinforcement structures are sequentially connected to all fixed sleepers in the first fixed sleeper group, all movable sleepers in the movable sleeper group, and all fixed sleepers in the second fixed sleeper group to form an integral track panel.

[0030] In the above technical solution, after all the fixed sleepers in the first and second fixed sleeper groups of the expansion joint, all the movable sleepers in the movable sleeper group, and the basic rails and switch rails in the rail expansion joint are laid, an auxiliary reinforcement structure is used to connect all the fixed sleepers and all the movable sleepers within the rail expansion joint range to form an integral rail panel. Simultaneously, the auxiliary reinforcement structure is removed before pouring concrete for concrete pouring and curing. At this time, the sleepers within the rail expansion joint range are integrated with the concrete pouring, ensuring that multiple sleepers are all in the preset positions, and the removed auxiliary reinforcement structure can be recycled.

[0031] With the above setup, during the coarse adjustment of the expansion joint during construction (e.g., preliminary assembly of the overall rail panel, tensile testing of connecting rod components, compression displacement testing, bolt torque verification, etc.) and during the expansion and contraction of the main bridge, relative movement between fixed and movable sleepers within the range of the rail expansion joint can be avoided. This prevents offset or misalignment of fixed and movable sleepers in the longitudinal or lateral directions. Therefore, after the coarse adjustment check, there is no need for secondary verification of the positions of the fixed and movable sleepers, thus improving construction efficiency. After the coarse adjustment of the overall rail panel, the auxiliary reinforcement structure is removed and concrete is poured. This ensures that all fixed and movable sleepers within the range of the rail expansion joint are integrally formed with the concrete, guaranteeing stable relative positions between them. Furthermore, the removed auxiliary reinforcement structure can be reused, reducing costs.

[0032] Optionally, during the coarse adjustment of the overall track layout, the track surface height is measured using a level, and the gauge of the switch rails is checked using a total station.

[0033] like Figures 3 to 5 As shown, in an embodiment of the present invention, there are at least two auxiliary reinforcement structures, which are arranged sequentially along a first preset direction. All fixed sleepers and all movable sleepers within the range of the rail expansion joint are connected by the at least two auxiliary reinforcement structures. Each auxiliary reinforcement structure includes a first connector 11 and a second connector 12 arranged sequentially along the first preset direction, and the two auxiliary reinforcement structures are fixedly connected by an intermediate connector 13.

[0034] In the above technical solution, the intermediate connector 13 is an iron pad, the length of the first connector 11 is less than the length of the second connector 12, and both first connectors 11 of the two auxiliary reinforcement structures are located at the tip of the switch rail, which can effectively reduce the shear force borne by the intermediate connector 13; both second connectors 12 span three sleepers (other sleepers except those near the tip of the switch rail), which can fix the relative geometric position of all sleepers within the range of the rail expansion joint; on the other hand, setting the auxiliary reinforcement structure as two independent connectors can also avoid the problem of inconvenient installation due to the excessive length of the connectors.

[0035] In another embodiment of the present invention, the length of the second connector 12 can vary depending on the number of sleepers within the range of the rail expansion adjuster and the expansion device. For example, the second connector 12 can also span 2, 4 or 5 sleepers.

[0036] In an embodiment of the present invention, the auxiliary reinforcement step includes: connecting the first connecting member 11 to a portion of the fixed sleeper located at the tip of the switch rail within the range of the rail expansion adjuster via a locking member; connecting the second connecting member 12 to other sleepers within the range of the rail expansion adjuster via a locking member; and connecting the first connecting member 11 and the second connecting member 12 via a locking member.

[0037] It should be noted that "other sleepers within the range of the rail expansion joint" refers to sleepers within the range of the rail expansion joint, excluding the fixed sleepers at the tip of the switch rail.

[0038] In the above technical solution, the locking component is an anchor bolt. Some of the anchor bolts pass through the first mounting through hole 101 opened on the first connector 11 and are connected to the preset bolt holes on the fixed sleeper or the movable sleeper. Other anchor bolts pass through the second mounting through hole 102 opened on the second connector 12 and are connected to the preset bolt holes on the fixed sleeper or the movable sleeper.

[0039] In one embodiment, the first connector 11 and the second connector 12 each include a base plate extending along a first preset direction and two side plates disposed at both ends of the base plate and forming an angle with the base plate. Each side plate has a connecting hole. One side plate of the first connector 11 and one side plate of the second connector 12 are fitted together. Anchor bolts pass through the connecting holes located on the two side plates in sequence to fix the first connector 11 and the second connector 12 together.

[0040] With the above setup, the first connector 11 and the second connector 12 are first connected to the corresponding sleepers, and then the first connector 11 and the second connector 12 are fixedly connected. This avoids the problem of inconvenient installation due to the connector being too long, and also avoids the problem of the connector accidentally touching the sleeper due to the connector being too long during the process of connecting the sleeper and the connector, which could cause the sleeper to shift or become misaligned.

[0041] In an embodiment of the present invention, after the auxiliary reinforcement step, the installation method further includes the step of fixing two adjacent auxiliary reinforcement structures together by means of an intermediate connector 13.

[0042] It should be noted that the bolt holes at the tip of the switch rail of the rail expansion joint are not on the same line as the bolt holes of the adjacent sleepers (i.e., the sleepers at the tip of the switch rail and the adjacent sleepers are not on the same line). Figure 3 (As shown in the second preset direction, there is a gap), that is, two adjacent auxiliary reinforcement structures are not on the same straight line, i.e., there is a gap in the second preset direction.

[0043] In one embodiment of this application, the intermediate connector 13 has two connecting through holes 131. The two connecting through holes 131 are arranged sequentially along a second preset direction that forms an angle with the first preset direction. The first connectors 11 of two adjacent auxiliary reinforcement structures are respectively connected to one of the two connecting through holes 131 by anchor bolts.

[0044] With the above configuration, on the one hand, two adjacent auxiliary reinforcement structures are fixedly connected by an intermediate connector 13, thereby connecting all fixed and movable sleepers within the range of the rail expansion joint into a single rail panel. On the other hand, since the bolt holes of the switch rail of the rail expansion joint at the tip of the switch rail are not on the same straight line as the bolt holes of the adjacent cavity rail panel, one of the two auxiliary reinforcement structures is connected to the sleeper at the tip of the switch rail, and the other of the two auxiliary structures is connected to all other sleepers except the one at the tip of the switch rail. Furthermore, the two auxiliary reinforcement structures, which are spaced apart in the second preset direction, are fixedly connected by an intermediate connector 13, thereby overcoming the problem of inconvenient installation caused by misaligned sleeper bolt holes.

[0045] In an embodiment of the present invention, after the step of removing the auxiliary reinforcement structure, the installation method further includes the step of using a track geometry measuring instrument to detect and fine-tune the geometry of the rail expansion joint.

[0046] It should be noted that the geometric state specifically refers to: internal track geometric parameters, such as track gauge, track gauge change rate, level (superelevation), track orientation, elevation, versine, twist (triangular pit), and mileage; and external track geometric parameters, such as track centerline, left and right track plane coordinates, and elevation.

[0047] like Figure 2 As shown, an embodiment of the present invention provides a construction method for ballastless track, the construction method including: a step of assessing track settlement; a step of installing a base and laying a reinforcing mesh; a step of installing a track expansion joint and a rail expansion adjuster, wherein the installation is performed using the above-described installation method for installing the track expansion joint and the rail expansion adjuster; a step of concrete pouring and formwork removal and curing; and a step of laying long rails.

[0048] Through the above-mentioned settings, during the construction of ballastless track, relative movement between the fixed and movable sleepers within the range of the rail expansion joint can be avoided, thus preventing offset or misalignment of the fixed and movable sleepers in the longitudinal or lateral directions. Therefore, after the initial rough adjustment check, there is no need for a secondary check of the positions of the fixed and movable sleepers, thereby improving the overall construction efficiency of the ballastless track. In an embodiment of the invention, when the ballastless track is a double-block ballastless track, the construction method further includes the steps of laying the upper layer of reinforcing steel bars and installing formwork before removing the auxiliary reinforcement structure.

[0049] The construction method for ballastless track of the present invention has all the technical features and effects of the above-mentioned installation method for installing track expansion joints and rail expansion adjusters, which will not be repeated here.

[0050] like Figure 3 As shown, an embodiment of the present invention provides an auxiliary reinforcement component for the installation of a track expansion device and a rail expansion adjuster. The auxiliary reinforcement component is applied to the above-mentioned installation method of the track expansion device and rail expansion adjuster. The auxiliary reinforcement component includes at least two auxiliary reinforcement structures that are interconnected, and the at least two auxiliary reinforcement structures are arranged sequentially along a first preset direction.

[0051] In the above technical solution, the auxiliary reinforcement component also includes an intermediate connector 13 for connecting two adjacent auxiliary reinforcement structures. The intermediate connector 13 has two connecting through holes 131 arranged sequentially along a second preset direction. The two adjacent auxiliary reinforcement structures are respectively connected to one of the two connecting through holes 131. The second preset direction forms an angle with the first preset direction.

[0052] With the above configuration, on the one hand, the two auxiliary reinforcement structures can connect all fixed sleepers and all movable sleepers within the range of the rail expansion joint into a single rail panel; on the other hand, since the bolt holes of the sleepers at the tip of the rail expansion joint are not on the same straight line as the bolt holes of the adjacent cavity rail panels, one of the two auxiliary reinforcement structures is connected to the sleeper at the tip of the rail expansion joint, and the other of the two auxiliary structures is connected to the sleepers other than the sleepers at the tip of the rail expansion joint. Furthermore, the two auxiliary reinforcement structures, which are spaced apart in the second preset direction, are fixedly connected by the intermediate connector 13, thereby overcoming the problem of inconvenient installation caused by misalignment of the sleeper bolt holes.

[0053] like Figures 3 to 6 As shown, in an embodiment of the present invention, each auxiliary reinforcement structure includes a first connector 11 and a second connector 12 connected sequentially along a first preset direction. The first connector 11 has a first mounting through hole 101, and the second connector 12 has a second mounting through hole 102. The first connector 11 is connected to the sleeper located at the tip of the switch rail through the first mounting through hole 101 and a locking member. The sleeper is one of a fixed sleeper and a movable sleeper.

[0054] In the above technical solution, a first mounting through hole 101 is provided on the first connecting member 11, and three second mounting through holes 102 are provided at equal intervals on the second connecting member 12. Each mounting through hole corresponds to a sleeper and is fixedly connected to the corresponding sleeper by anchor bolts. This arrangement can ensure that the spacing between adjacent sleepers remains unchanged and maintains the preset interval, that is, avoid the sleepers from shifting in the first preset direction. On the other hand, it can also prevent multiple sleepers from moving relative to each other in the second preset direction.

[0055] In one embodiment of the present invention, the relationship between the length L1 of the first connector 11 and the length L2 of the second connector 12 is: L2 = 3L1.

[0056] In another embodiment of the present invention, the length of the second connector 12 can vary depending on the number of sleepers within the range of the rail expansion adjuster and the expansion device. For example, the second connector 12 can also span 2, 4 or 5 sleepers. In this case, the length of the second connector 12 becomes L2 = 2L1, L2 = 4L1 or L2 = 5L1, and the number of second mounting through holes 102 opened on the second connector 12 becomes 2, 4 or 5.

[0057] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects: After all the fixed sleepers in the first fixed sleeper group and the second fixed sleeper group of the expansion joint, all the movable sleepers in the movable sleeper group, and the basic rails and switch rails in the rail expansion adjuster are laid, all the fixed sleepers and all the movable sleepers within the range of the rail expansion adjuster are connected by an auxiliary reinforcement structure to form an integral rail panel. During the construction process, when the expansion joint is coarsely adjusted (for example, initially assembling the integral rail panel, performing tension checks on the connecting rod components, compression displacement checks, bolt torque verification, etc.) and during the expansion and contraction of the main bridge, relative movement between the fixed sleepers and movable sleepers within the range of the rail expansion adjuster can be avoided, thereby preventing the fixed sleepers and movable sleepers from shifting or misaligning in the longitudinal or lateral directions. Thus, after the coarse adjustment and inspection steps, there is no need to perform a secondary check on the positions of the fixed sleepers and movable sleepers, improving construction efficiency. After the overall rail panel is roughly adjusted, the auxiliary reinforcement structure is removed and concrete is poured. This ensures that all fixed and movable sleepers within the rail expansion joint range are integrated with the concrete structure, guaranteeing the relative positional relationship between all fixed and movable sleepers. At the same time, the removed auxiliary reinforcement structure can be recycled, reducing costs.

[0058] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method of installing a rail expansion device and rail expansion adjuster, characterised in that, The method comprises the following steps: Laying a first fixed sleeper group, a movable sleeper group and a second fixed sleeper group of the expansion device along a first preset direction, wherein the first fixed sleeper group and the second fixed sleeper group each comprise a plurality of fixed sleepers arranged at intervals along the first preset direction, and the movable sleeper group comprises a plurality of movable sleepers arranged at intervals along the first preset direction; Laying a base rail and a point rail of the rail expansion regulator, wherein the base rail is laid above the first fixed sleeper group, the movable sleeper group and the second fixed sleeper group, so that the base rail covers all the fixed sleepers in the first fixed sleeper group and the second fixed sleeper group and all the movable sleepers in the movable sleeper group, and the point rail is connected with one end of the base rail; Connecting a link assembly of the expansion device with the end of each movable sleeper of the movable sleeper group, and connecting the two ends of the link assembly to two fixed sleepers adjacent to the movable sleeper group; Installing a fastener system, and connecting all the fixed sleepers and all the movable sleepers in the range of the rail expansion regulator with the base rail by using the fastener system; An auxiliary reinforcing step of connecting all the fixed sleepers and all the movable sleepers in the range of the rail expansion regulator by using an auxiliary reinforcing structure to form an integral track panel; Coarse adjustment of the integral track panel, measuring and adjusting the rail surface height of each fixed sleeper and each movable sleeper in the range of the rail expansion regulator, and checking whether the gauge of the point rail meets the requirements; Removing the auxiliary reinforcing structure, and pouring concrete so that all the fixed sleepers and all the movable sleepers in the range of the rail expansion regulator are integrated with the poured concrete; The auxiliary reinforcing structure comprises a first connecting piece (11) and a second connecting piece (12) arranged in sequence along the first preset direction, and the auxiliary reinforcing step comprises the following steps: Connecting the first connecting piece (11) with part of the fixed sleepers in the range of the rail expansion regulator at the tip of the point rail by using a locking piece; Connecting the second connecting piece (12) with other sleepers in the range of the rail expansion regulator by using a locking piece; and Connecting the first connecting piece (11) and the second connecting piece (12) by using a locking piece; In the auxiliary reinforcing step, there are at least two auxiliary reinforcing structures arranged in sequence along the first preset direction, and all the fixed sleepers and all the movable sleepers in the range of the rail expansion regulator are connected by using the at least two auxiliary reinforcing structures; After the auxiliary reinforcing step, the installation method further comprises the following step: Fixing and connecting two adjacent auxiliary reinforcing structures by using an intermediate connecting piece (13).

2. The installation method for installing rail expansion devices and rail expansion adjusters according to claim 1, characterized in that, After the step of removing the auxiliary reinforcing structure, the installation method further comprises the following step of detecting and fine-tuning the geometric state of the rail expansion regulator by using a track geometric state measuring instrument.

3. A construction method of a ballastless track, characterized by, The construction method comprises the following steps: A step of evaluating the line settlement; A step of installing a base and laying a steel mesh; A step of installing a rail expansion device and a rail expansion adjuster, which is installed by using the installation method for installing a rail expansion device and a rail expansion adjuster according to claim 1 or 2. A step of pouring concrete and curing formwork; and A step of laying long rails.

4. The construction method of a ballastless track according to claim 3, characterized in that, When the ballastless track is a double-block ballastless track, before the auxiliary reinforcing structure is removed, the construction method further comprises steps of laying a top layer of track bed reinforcement and installing a formwork.

5. A supplementary reinforcement assembly for rail expansion devices and rail expansion joint installations, comprising: The auxiliary reinforcing assembly is applied to the installation method for installing a rail expansion device and a rail expansion adjuster according to claim 1 or 2, and the auxiliary reinforcing assembly comprises at least two auxiliary reinforcing structures connected with each other.

6. The rail expansion and contraction device and the auxiliary reinforcement assembly for the rail expansion joint regulator installation according to claim 5, characterized in that, The auxiliary reinforcing assembly further comprises an intermediate connecting piece (13) for connecting two adjacent auxiliary reinforcing structures, the intermediate connecting piece (13) is provided with two connecting through holes (131) arranged in a second preset direction, and the two adjacent auxiliary reinforcing structures are connected with one of the two connecting through holes (131) respectively, and the second preset direction forms an angle with the first preset direction.

7. The rail expansion and contraction device and the auxiliary reinforcement assembly for the rail expansion joint regulator installation according to claim 5, characterized in that, Each auxiliary reinforcing structure comprises a first connecting piece (11) and a second connecting piece (12) connected in the first preset direction in sequence, the first connecting piece (11) is provided with a first installation through hole (101), the second connecting piece (12) is provided with a second installation through hole (102), and the first connecting piece (11) is connected with a fixed sleeper at a tip end of a switch rail through the first installation through hole (101) and a locking piece.

8. The rail expansion and contraction device and the auxiliary reinforcement assembly for the rail expansion joint regulator installation according to claim 7, characterized in that, The relationship between the length L1 of the first connecting piece (11) and the length L2 of the second connecting piece (12) is L2=3L1.

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