Construction methods for temporary access roads during the expansion and renovation of large-scale marshalling yards

Abstract

This invention discloses a method for constructing temporary passages during the expansion and renovation of large-scale marshalling yards, comprising the following steps: 1) Track bed reinforcement: inserting wooden sleepers laterally between existing sleepers; 2) Track center laying: after the track is closed, protective wheel rails are laid longitudinally, and the track center is leveled with crushed stone. The height of the wooden sleepers is controlled to be consistent with the existing steel surface elevation by filling the crushed stone. Crushed stone and sand are filled into the track center and compacted to ensure uniform stress. Then, multiple longitudinal wooden sleepers are laid longitudinally, spaced apart inside and outside the track center. Each pair of wooden sleepers located inside or outside the track center is secured with track spikes to form a whole; 3) Steel plate paving: after the wooden sleepers are laid, steel plates are laid on top of the track center sleepers and secured to the longitudinal wooden sleepers below with track spikes; 4) Approach road construction: approach roads are symmetrically and inclinedly set on both sides of the existing track. This invention overcomes the difficulties in material supply, ensures the smooth progress of construction, and effectively improves the efficiency of material transportation.

Description

Technical Field

[0001] This invention relates to the field of railway construction. More specifically, this invention relates to a method for constructing temporary access roads during the expansion and renovation of large-scale marshalling yards. Background Technology

[0002] The key to railway construction is the supply of materials, and the timeliness of material supply directly determines the continuity of project construction. In the process of material supply, transportation channels play a crucial role in ensuring the timeliness of material supply.

[0003] Due to the limitations of existing railway lines, the new track is located between existing tracks, and the construction area is enclosed by the existing lines, forming an inner island with no access for machinery or materials. Traditional material transportation relies on rail transport and unloading at designated points, requiring advance submission of transportation plans and relatively fixed supply times. Supplying too early would restrict on-site work space, while supplying too late would affect the construction progress. Summary of the Invention

[0004] The purpose of this invention is to provide a method for constructing temporary access routes during the expansion and renovation of large-scale marshalling yards. By adopting a scheme of laying temporary access routes and allowing passage at key points, the efficiency of material transportation is effectively improved.

[0005] The technical solution adopted by this invention to solve this technical problem is: a method for constructing temporary passages during the capacity expansion and renovation of large-scale marshalling yards, comprising the following steps:

[0006] 1) Track bed reinforcement: Insert multiple wooden sleepers laterally between existing sleepers;

[0007] 2) Track center laying: After the track is closed, guard rails are laid longitudinally. Then, the track center is leveled with crushed stone. The height of the wooden sleepers is controlled by filling the crushed stone to be consistent with the existing steel surface elevation. Crushed stone and sand are filled into the track center and compacted to ensure uniform stress. Then, multiple longitudinal wooden sleepers are laid longitudinally. The multiple longitudinal wooden sleepers are arranged at intervals inside and outside the track center. Every two wooden sleepers inside or outside the track center are nailed together with track spikes to form a whole.

[0008] 3) Steel plate paving: After the wooden sleepers are laid, a 1cm thick steel plate is laid on top of the wooden sleepers in the center of the track and nailed to the longitudinal wooden sleepers below with track spikes;

[0009] 4) Approach road construction: The approach roads are symmetrically and inclinedly set on both sides of the existing tracks for the construction of steps 1) to 3).

[0010] Preferably, the track bed reinforcement specifically includes:

[0011] The track was blocked, and multiple wooden sleepers were inserted between the existing sleepers to reinforce the subgrade within a certain range. After the sleepers were inserted, they were tamped down to ensure compaction.

[0012] Preferably, when inserting wooden sleepers into existing sleepers, three adjacent sleepers are grouped together, with one wooden sleeper inserted between two adjacent sleepers in each group, and two wooden sleepers are inserted into each group. Wooden sleepers are then inserted into multiple groups of sleepers.

[0013] Preferably, in step 2), when the guard rail is laid longitudinally, the rail head of the guard rail contacts the web of the existing rail.

[0014] Preferably, the top surfaces of the steel plate and the guard rail are both 1-2 cm higher than the top surface of the existing rail.

[0015] Preferably, in step 4), the approach road construction specifically involves: using concrete sleepers laid upside down at non-track locations, and reinforcing the road surface with sand and gravel before laying.

[0016] Preferably, it also includes step 5) passage protection: a sliding door is installed on the outside of the access road, and anti-collision posts are installed on both sides of the access road.

[0017] This invention offers at least the following beneficial effects: Engineering practice has verified that this solution effectively addresses the challenge of transporting materials across existing railway lines, achieving high efficiency and reliable safety. This construction method not only guided the construction of this project but also accumulated rich engineering experience for similar projects, demonstrating significant application and promotion value.

[0018] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0019] Figure 1 This is a flowchart of the construction process of this invention;

[0020] Figure 2 This is a schematic diagram of the laying of the transversely reinforced wooden sleepers according to the present invention;

[0021] Figure 3 This is a schematic diagram of the laying of the wheel guard rail and longitudinal wooden sleepers of the present invention;

[0022] Figure 4 This is a schematic diagram of the steel plate paving of the present invention;

[0023] Figure 5 This is a schematic diagram of the construction of the access road of the present invention.

[0024] Explanation of reference numerals in the attached diagram: 1 sleeper, 2 guard wheel rail, 3 existing guide rail, 4 transverse wooden sleeper, 5 longitudinal wooden sleeper, 6 steel plate, 7 concrete sleeper. Detailed Implementation

[0025] The present invention will now be described in detail and completely with reference to the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention with reference to the accompanying drawings, it should be particularly noted that the technical solutions and features provided in various parts of the present invention, including the following description, can be combined with each other without conflict.

[0026] Furthermore, the embodiments of the present invention described below are generally only some, not all, of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The specific implementation process is as follows:

[0028] like Figure 1 As shown, a method for constructing temporary access roads during the capacity expansion and renovation of a large-scale marshalling yard includes the following steps:

[0029] 1) Track bed reinforcement: Multiple transverse wooden sleepers 4 are inserted transversely between the existing sleepers 1. In this embodiment, the dimensions of the transverse wooden sleepers 4 are 0.22*0.16*2.6m;

[0030] 2) such as Figure 3 As shown, the track center is laid as follows: After the track is blocked, guard rails 2 are laid longitudinally. The guard rails 2 can be P43 or P50 steel rails. The purpose of laying guard rails 2 is twofold: first, guard rails 2 can protect the connection fasteners between the existing track and the concrete sleepers 7, preventing heavy objects from pressing on the fasteners; second, guard rails 2 support the existing guide rails 3, preventing the existing guide rails 3 from deforming. Afterwards, the track center is leveled with crushed stone. The height of the wooden sleepers is controlled to be consistent with the existing steel surface elevation by filling the crushed stone. The crushed stone and sand are filled into the track center and compacted to ensure uniform stress. Then, multiple longitudinal wooden sleepers 5 are laid longitudinally. The multiple longitudinal wooden sleepers 5 are arranged at intervals inside and outside the track center. In this embodiment, five longitudinal wooden sleepers 5 are arranged side by side inside the track center. Every two adjacent wooden sleepers inside or outside the track center are fixed with track spikes to form a whole.

[0031] 3) Steel Plate 6 Paving: After the wooden sleepers are laid, a 1cm thick steel plate 6 is laid on top of the central wooden sleepers and secured to the longitudinal wooden sleepers 5 below with track spikes. Figure 4 As shown;

[0032] 4) Approach road construction: The approach roads are symmetrically and inclinedly set on both sides of the existing tracks for the construction of steps 1) to 3).

[0033] This technical solution may also include the following technical details to better achieve the technical effect: The track bed reinforcement specifically includes:

[0034] like Figure 2 As shown, before laying the passage, the passage and the existing line on both sides for 50 meters should be inspected, and line defects should be rectified in advance; the track should be closed, and multiple transverse reinforcing wooden sleepers should be inserted between the existing sleepers. In this embodiment, there are 6 wooden sleepers to reinforce the subgrade within a certain range. In this embodiment, the subgrade reinforcement range is 5m. After insertion, the subgrade should be compacted.

[0035] This technical solution may also include the following technical details to better achieve the technical effect: when inserting wooden sleepers into existing sleepers 1, three adjacent sleepers 1 are grouped together, and one wooden sleeper is inserted between two adjacent sleepers 1 in each group. Two wooden sleepers are inserted into each group, and wooden sleepers are inserted into multiple groups of sleepers 1.

[0036] This technical solution may also include the following technical details to better achieve the technical effect: In step 2), when the guard rail 2 is laid longitudinally, the rail head of the guard rail 2 contacts the rail web of the existing track to prevent slippage.

[0037] This technical solution may also include the following technical details to better achieve the technical effect: the top surfaces of the steel plate 6 and the guard rail 2 are both 1-2 cm higher than the top surface of the existing rail.

[0038] This technical solution may also include the following technical details to better achieve the technical effect: In step 4), the construction of the approach road is specifically as follows: concrete sleepers 7 are laid upside down at the non-track locations. Before laying, the road surface is reinforced with sand and gravel. In this embodiment, the slope ratio is 1:1.75.

[0039] This technical solution may also include the following technical details to better achieve the technical effect: such as Figure 5 As shown, it also includes step 5) passage protection settings: a sliding door is installed on the outside of the access road, which is closed during non-key passage time, and anti-collision bollards are installed on both sides of the access road.

[0040] In the aforementioned technical solutions, the method of laying temporary level crossings on existing railway tracks solves the material supply problem in island areas within railway operating lines, achieving timely, rapid, safe, and controllable resource allocation. The adoption of truck-based material supply, adjusting the traditional railway transport and key-point unloading methods, resolves problems such as untimely material supply, large unloading impact areas, and low transport efficiency during construction, ensuring the timeliness and continuity of material supply. This method is suitable for construction crossing existing railway lines and is particularly advantageous for material supply to construction areas enclosed by railway operating lines. Laying temporary orthogonal level crossings on tracks outside the construction area to the construction area, and using key-point truck passage, further improves the timeliness and continuity of material supply.

[0041] The main materials are listed in Table 1, and the main equipment is listed in Table 2.

[0042] Table 1

[0043] name Specification quantity Remark wooden pillow 0.22×0.16×2.6m 24 pieces P50 steel rails 5.2m, with bends at both ends 2 sticks steel plate 1200×500×10mm 16 pieces concrete sleepers Type II pillow 14 Determined by the length of the guide channel Ballast Level 1 20 cubic meters Rail spikes several passageway railings 5m long, 1.2m high 1 set

[0044] Table 2

[0045]

[0046]

[0047] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and embodiments shown and described herein.

Claims

1. A method for constructing temporary access roads during the capacity expansion and renovation of a large-scale marshalling yard, characterized in that, Includes the following steps: 1) Track bed reinforcement: The track is closed off, and multiple transverse wooden sleepers are inserted between the existing sleepers to reinforce the track bed within a certain range. After insertion, the sleepers are tamped down. When inserting transverse wooden sleepers into the existing sleepers, three adjacent sleepers are grouped together, with one transverse wooden sleeper inserted between two adjacent sleepers in each group. Two transverse wooden sleepers are inserted into each group, and multiple groups of sleepers are then reinforced with transverse wooden sleepers. Simultaneously, before laying the tunnel, the tunnel and 50 meters of existing track on both sides should be inspected, and any track defects should be addressed in advance. The dimensions of the transverse wooden sleepers are 0.22×0.16×2.6m, and the track bed reinforcement range is 5m. 2) Track center laying: After the track is closed, guard rails are laid longitudinally, with the rail head of the guard rail contacting the web of the existing track. The guard rails are P43 or P50 steel rails. Then, the track center is leveled with crushed stone. The height of the transverse wooden sleepers is controlled by the height of the crushed stone filling to ensure that the height is consistent with the existing sleeper elevation. The track center is filled with crushed stone and sand and compacted to ensure uniform stress. Then, multiple longitudinal wooden sleepers are laid longitudinally, with the longitudinal wooden sleepers arranged at intervals inside and outside the track center. Every two longitudinal wooden sleepers inside or outside the track center are secured with track spikes to form a whole. Five longitudinal wooden sleepers are arranged side by side inside the track center. 3) Steel plate paving: After the wooden sleepers are laid, steel plates are laid on top of the longitudinal wooden sleepers in the center of the track and nailed to the longitudinal wooden sleepers below with track spikes; the steel plate is 1cm thick, and the top surface of the steel plate and the guard rail is 1-2cm higher than the top surface of the existing track; 4) Approach road construction: The approach roads are symmetrically and inclinedly set on both sides of the existing track for the construction of steps 1) to 3); The specific construction of the approach roads is as follows: concrete sleepers are laid upside down at the non-track locations, and the road surface is reinforced with sand and gravel before laying. The slope ratio of the approach roads is 1:1.

75. 5) Passage protection measures: Sliding doors are installed on the outside of the access road and are closed during non-critical passage times. Anti-collision bollards are installed on both sides of the access road.

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