Lossless dismantling and laying construction method for ballastless turnout of high-speed railway

Abstract

The invention relates to the field of high-speed railways, and particularly discloses a lossless dismantling and laying construction method for a ballastless turnout of a high-speed railway. The novel construction method is used for high-speed railway ballastless turnout lossless dismantling and laying construction, before work is started, structures of turnout joints and steel rails before dismantling are investigated and determined and are numbered respectively, meanwhile, plane coordinates of a ballastless turnout turnout point rail and steel rails before and after turnout are determined, the installation structure of the turnout is accurately positioned, and the construction efficiency is improved. The steel rails are decomposed and transported through the built temporary guide rails, rechecking and fine adjustment are carried out at the design position according to the drawn structure schematic diagram and plane coordinates, lossless dismantling and laying construction of the ballastless turnout of the high-speed railway is completed, and then waste caused by damage to the original ballastless turnout of the high-speed railway is effectively avoided; on the premise that it is guaranteed that the ballastless turnout of the high-speed railway still has high assembling and laying precision, the old ballastless turnout of the high-speed railway is effectively utilized again, and the utilization rate of railway assets is effectively increased.

Description

Technical Field

[0001] The invention belongs to the technical field of high-speed railways, and in particular relates to a non-destructive dismantling and laying construction method for ballastless turnouts on high-speed railways. Background Art

[0002] A turnout refers to a track device that divides a railway line into two or more lines. It is mainly composed of rail parts, fasteners and connecting parts. With the demand for faster railway transportation and the increase in transportation demand, it is necessary not only to upgrade the trains, but also to upgrade the supporting equipment such as stations and tracks. High-speed railways require smooth and comfortable train operation, which also puts forward higher design and installation requirements for turnouts connecting multiple railway lines. They must have high manufacturing, assembly and laying accuracy to ensure that high-speed railway turnouts have high smoothness and high stability, which also leads to an increase in the cost of high-speed railway turnouts.

[0003] The reconstruction of stations and tracks cannot be achieved overnight. Some stations will gradually reconstruct some tracks first, and then reconstruct stations. Therefore, there will be situations where new tracks are matched with old stations. The reconstruction of these large old stations may involve the dismantling and re-laying of new high-speed railway ballastless turnouts. In the past, similar projects lacked systematic dismantling and re-laying technology. Under tight construction periods, destructive dismantling methods were often adopted, resulting in the complete destruction of turnout structures that are still in their service life and cannot be restored. Since the cost of new high-speed railway ballastless turnouts is high, destructive dismantling equipment will cause a huge waste of railway assets. It is necessary to design a new high-speed railway ballastless turnout dismantling and re-laying construction method to minimize the loss of track reconstruction or even achieve no loss. Summary of the invention

[0004] The object of the present invention is to provide a non-destructive dismantling and laying construction method for ballastless turnouts on high-speed railways, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A non-destructive dismantling and laying construction method for a high-speed railway ballastless turnout comprises the following steps:

[0007] S1. Pre-construction investigation: Conduct construction investigation on the ballastless turnouts that need to be removed, draw a schematic diagram based on the investigation results, and number the turnout joints and rails;

[0008] S2. Coordinate collection: collecting the plane coordinates of the turnout center rail, the rails before and after the turnout of the ballastless turnout that need to be removed;

[0009] S3, dismantling the steel rails, removing and cutting the steel rails, and marking and numbering the steel rails on site according to the schematic diagram drawn in S1;

[0010] S4, rail transportation, planning the storage location of turnout rails, using wooden sleepers to build guide rails in areas without rails, and transporting the removed rails to the planned site for stacking through the guide rails and existing rails;

[0011] S5, restore the rails, lay out the sleepers according to the designed position, use the guide rails to transport the stacked turnout rails to the designed position, and verify and fine-tune based on the coordinate data in S2.

[0012] Preferably, in said S1, the construction survey items include the location of thermite welding joints, the location of adhesively bonded insulating joints and the station line distribution.

[0013] Preferably, in S2, the plane coordinate collection points include four points on the front, back, left and right sides of the ballastless turnout rail, and no less than three rail points before and after the turnout.

[0014] Preferably, in said S3, when disassembling the rails, the glued insulating clamps of the ballastless turnout are removed, the thermite welded joints are cut, and 25 m new rails are used for replacement.

[0015] Preferably, in S4, when building the guide rail, a running track is laid on the outside of the existing track using a steel rail of 43kg / m-12.5m, and the point rail, base rail and movable heart rail fork are transported to the planned site by a rail flat car. After the fasteners are removed, a roller is installed every 12.5m, and the turnout and single steel rails of the front and rear lines are transported by a monorail car and rollers, and the rails are transported to the planned site for stacking.

[0016] Preferably, rollers or DN25 steel pipes are used to support the bottom of the stacked rails, double-layer geotextiles are used to wrap the rail ends and switch points, and warning signs are tied at the rail stacking locations.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention designs a new construction method for the non-destructive dismantling and laying construction of the ballastless track of the high-speed railway. Before the construction starts, the structures of the turnout joints and the rails before dismantling are investigated and determined and numbered respectively, and the plane coordinates of the turnout heart rail, the rails before the turnout and the rails after the turnout are determined at the same time, the installation structure of the turnout is accurately positioned, the rails are disassembled and transported through the constructed temporary guide rails, and the structural schematic diagrams and plane coordinates drawn are reviewed and fine-tuned at the designed position to complete the non-destructive dismantling and laying construction of the ballastless turnout of the high-speed railway, thereby effectively avoiding the waste caused by damaging the original ballastless turnout of the high-speed railway, and under the premise of ensuring that the ballastless turnout of the high-speed railway still has high assembly and laying accuracy, the old ballastless turnout of the high-speed railway is effectively reused, thereby effectively improving the utilization rate of railway assets. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the construction method of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example:

[0022] See also Figure 1 As shown, a non-destructive dismantling and laying construction method for high-speed railway ballastless turnouts specifically includes the following steps:

[0023] S1. Pre-construction investigation: Conduct construction investigation on the ballastless turnouts that need to be removed. The construction investigation items include the location of thermite welding joints, the location of glued insulation joints, and the distribution of station lines. Draw a schematic diagram based on the investigation results and number the turnout joints and rails.

[0024] S2. Coordinate collection: collect plane coordinates. The plane coordinate collection points include four points in front, behind, left and right of the ballastless turnout rail, and no less than three rail points in front of and behind the turnout.

[0025] S3, rail disassembly, according to the principle of re-laying first, disassembling and then transporting, remove the glued insulating plywood of the ballastless turnout, rails with glued insulating joints installed at the factory shall not be disassembled, select the cutting position of the aluminothermic welding joint based on the principle of convenient transportation after the turnout is disassembled, cut the aluminothermic welding joint of the guide rail, and replace it with a 25m new rail later. Before disassembling the rail, mark and number the disassembled rail on site according to the schematic diagram drawn in S1;

[0026] S4. Rail transportation. According to the actual situation of the station yard, plan the storage location of the turnout rails, and follow the principle of re-laying before transportation. In areas without rails, use wooden sleepers to build guide rails for transportation. When building guide rails, use 43kg / m-12.5m rails on the outside of the existing track to lay the running track. Use rail flat cars to transport the point rails, basic rails, movable heart rails and other unit components to the planned site. After removing the fasteners, install a roller every 12.5m. Use monorail cars and rollers to transport the turnouts and single rails of the front and rear lines. Transport the rails to the planned site for stacking. Pay attention to bundling and fixing each component during transportation to prevent it from being damaged during transportation. In case of an accident, when lifting and transporting heavy parts such as turnout rails, use lifting machinery for loading and unloading. When lifting, the lifting points should be arranged on both sides of the center of gravity of the parts. It is strictly forbidden to lift long and large parts at a single point to prevent the deformation of turnout parts. The removed rails are transported to the planned site for stacking through the guide rails and existing rails. The planned site should be solid and flat to prevent the deformation of turnout parts. Stack in the order of numbers, with long parts at the bottom and short parts at the top. The number of stacking layers should not exceed 6. Rollers or DN25 steel pipes are used to support the bottom of the rails to prevent the rails from deforming under temperature stress. Double-layer geotextiles are used to wrap the rail ends and turnout tips. Warning signs are tied at the rail stacking site to avoid bumping the rails.

[0027] S5, restore the rails, lay out the sleepers according to the designed position, use the guide rails to transport the stacked turnout rails to the designed position, and verify and fine-tune based on the coordinate data in S2.

[0028] Through field investigation before construction, a schematic diagram of the ballastless turnout structure to be dismantled is drawn up, and the turnout joints and rails are numbered. At the same time, the coordinates of the ballastless turnout heart rail, the rails in front of and behind the turnout are collected, including the coordinates of four points in front, back, left and right of the ballastless turnout heart rail. No less than three points are collected on the rails in front of and behind the turnout respectively. Through the coordinates of these points, the positions of the ballastless turnout heart rail and the rails in front of and behind the turnout can be accurately located. Then the rails are disassembled, the ballastless turnout glued insulating plywood is removed, the aluminothermic welding joints are cut, the guide rails are built to transport the disassembled rails, and the disassembled rails are reassembled at the planning and design site. The previously drawn ballastless turnout structure schematic diagram and the recorded point coordinates are reviewed and fine-tuned, which helps to maintain the assembly and laying accuracy of the rails and turnouts.

[0029] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0030] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0034] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A non-destructive dismantling and laying construction method for high-speed railway ballastless turnouts, characterized in that: The specific steps include: S1. Pre-construction investigation: Conduct construction investigation on the ballastless turnouts that need to be removed, draw a schematic diagram based on the investigation results, and number the turnout joints and rails; S2. Coordinate collection: collecting the plane coordinates of the turnout center rail, the rails before and after the turnout of the ballastless turnout that need to be removed; S3, dismantling the steel rails, removing and cutting the steel rails, and marking and numbering the steel rails on site according to the schematic diagram drawn in S1; S4, rail transportation, planning the storage location of turnout rails, using wooden sleepers to build guide rails in areas without rails, and transporting the removed rails to the planned site for stacking through the guide rails and existing rails; S5, restore the rails, lay out the sleepers according to the designed position, use the guide rails to transport the stacked turnout rails to the designed position, and verify and fine-tune based on the coordinate data in S2.

2. The non-destructive dismantling and laying construction method of a high-speed railway ballastless turnout according to claim 1 is characterized in that: In S1, the construction survey items include the location of thermite welding joints, the location of glued insulation joints and the station line distribution.

3. The non-destructive dismantling and laying construction method of a high-speed railway ballastless turnout according to claim 1 is characterized in that: In S2, the plane coordinate collection points include four points in front, behind, left and right of the ballastless turnout rail, and no less than three rail points in front of and behind the turnout.

4. The non-destructive dismantling and laying construction method of a high-speed railway ballastless turnout according to claim 1 is characterized in that: In S3, when disassembling the rails, the glued insulating clamps of the ballastless turnout are removed, the thermite welded joints are cut, and 25m new rails are used for replacement.

5. The non-destructive dismantling and laying construction method of a high-speed railway ballastless turnout according to claim 1 is characterized in that: In S4, when constructing the guide rail, the running track is laid on the outside of the existing track using a 43kg / m-12.5m steel rail, and the point rail, base rail and movable heart rail fork are transported to the planned site by a rail flat car. After the fasteners are removed, a roller is installed every 12.5m, and the turnout and the single steel rails of the front and rear lines are transported by a monorail car and rollers, and the rails are transported to the planned site for stacking.

6. The non-destructive dismantling and laying construction method of a high-speed railway ballastless turnout according to claim 5 is characterized by: Use rollers or DN25 steel pipes to support the bottom of the stacked rails, use double-layer geotextile to wrap the rail ends and switch points, and tie warning signs at the rail stacking location.

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