Spare rail support suitable for prefabricated track slab roadbed sections and its installation method

Abstract

The present invention relates to the field of track structure technology, and in particular to a spare rail support suitable for prefabricated track slab roadbed sections and an installation method thereof, comprising a channel steel cross frame, one end of the channel steel cross frame matches the inner wall of a shield segment, and the other end is provided with a support foot at the bottom, the support foot is used to support the channel steel cross frame, and angle steels are provided on the channel steel cross frame that can slide laterally and be fixed at a certain position. The advantages of the present invention are: it realizes the suspended installation of spare rails, completely avoiding adverse effects on ditches, especially avoiding the reduction of drainage performance due to the occupation of ditches; the structure is stable, which can effectively ensure that the spare rails are placed securely, further facilitating their subsequent emergency use; it effectively ensures the quality of the spare rails, which can be beneficial for their long-term storage; it is easy to install and suitable for promotion.

Description

Technical Field

[0001] The present invention relates to the technical field of track structures, in particular to a spare rail bracket suitable for a prefabricated track slab roadbed section and an installation method thereof. Background Art

[0002] Spare rails are often placed within shield tunnel sections for emergency repairs. When an emergency occurs and the existing rails need to be replaced, the spare rails are used instead. Currently, when shield tunnels use cast-in-place trackbeds, spare rails are placed directly outside the sleepers. However, there is no concrete between the precast track slab and the shield segments. Therefore, if spare rails are needed, they must be placed above the ditches on either side of the trackbed. This placement is not only unstable but also affects drainage. Summary of the Invention

[0003] The purpose of the present invention is to provide a spare rail bracket and an installation method suitable for prefabricated track slab roadbed sections based on the above-mentioned deficiencies of the existing technology. By designing the spare rail bracket, the spare rail can be stably installed on the prefabricated track slab roadbed section.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] A spare rail bracket suitable for prefabricated track slab roadbed sections, used for placing spare rails in shield tunnels, characterized in that: the spare rail bracket includes a channel steel cross frame, one end of the channel steel cross frame matches the inner wall of the shield segment, and the bottom of the other end is provided with a support foot, the support foot is used to support the channel steel cross frame, and an angle steel is provided on the channel steel cross frame, which can slide laterally along the channel steel cross frame and be fixed at a certain position.

[0006] The channel steel cross frame is provided with a narrow slot, the length direction of the narrow slot is the transverse direction of the channel steel cross frame, one side of the angle steel can be connected to the narrow slot by bolts, and the other side is erected on the surface of the channel steel cross frame.

[0007] One end of the channel steel cross frame matches the inner wall of the shield segment, which means that the side end surface of the channel steel cross frame is set to a curved surface or an inclined surface that matches the inner wall of the shield segment.

[0008] The width of the channel steel cross frame is not greater than the width of the plate gap between adjacent prefabricated track plates, and the length of the channel steel cross frame is sufficient to allow the supporting legs to be supported on the track bed base between adjacent prefabricated track plates.

[0009] The length of the angle steel is greater than the width of the plate gap between adjacent prefabricated track plates.

[0010] A method for installing the above-mentioned spare rail support suitable for prefabricated track slab roadbed sections is characterized in that the installation method comprises the following steps:

[0011] Select the section where spare rails need to be configured from the prefabricated track slab roadbed section within the shield segment;

[0012] Install a channel steel cross frame at the plate gap between each adjacent precast track plate, support one end of the channel steel cross frame on the inner wall of the shield segment, and support the support foot at the bottom of the other end of the channel steel cross frame on the roadbed base between the adjacent precast track plates;

[0013] Adjust the position of the angle steel on the channel steel cross frame so that the angle steel slides along the direction of the narrow and long slot until the upright side of the angle steel is in close contact with the outer end surface of the prefabricated track plate, and tighten the bolts to connect and fix the angle steel to the narrow and long slot;

[0014] The spare rail is placed on the channel steel cross frame.

[0015] The placement height of the spare rail is adjusted by adjusting the height of the supporting feet.

[0016] The channel steel cross frames are respectively installed on both sides of the prefabricated track plate.

[0017] The advantages of the present invention are: realizing the suspended installation of spare rails, completely avoiding adverse effects on the ditch, especially avoiding the reduction of drainage performance due to the ditch occupying space; the structure is stable, which can effectively ensure that the spare rails are placed firmly, further facilitating their subsequent emergency use; effectively ensuring the quality of the spare rails, which can be beneficial for their long-term storage; easy installation, and suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional view of the installation structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the installation structure of the present invention;

[0020] Figure 3 It is a front view of the spare rail support in the present invention;

[0021] Figure 4 for Figure 3 A top view of

[0022] Figure 5 for Figure 3 side view. DETAILED DESCRIPTION

[0023] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0024] like Figure 1-5 As shown in the figure, marks 1-14 respectively represent: spare rail 1, rail 2, fastener 3, rail support 4, precast track plate 5, self-compacting concrete 6, geotextile isolation layer 7, reinforced concrete base 8, spare rail bracket 9, channel steel cross frame 10, support foot 11, angle steel 12, bolt 13, narrow slot 14.

[0025] Example: Figure 1 and Figure 2 As shown, the spare rail supports in this embodiment, suitable for use in precast track slab roadbed sections, are used to place spare rails in these sections for emergency repairs. This section includes a reinforced concrete base 8, located within the shield segment, serving as the roadbed foundation. A precast track slab 5 is positioned above the reinforced concrete base 8. Self-compacting concrete 6 and a geotextile insulation layer 7 are placed between the precast track slab 5 and the reinforced concrete base 8. The precast track slab 5 has a rail support 4 for supporting the rail 2, which is mounted above the rail support 4 via fasteners 3.

[0026] Combine Figures 3 to 5 As shown, the main body of the spare rail bracket 9 in this embodiment is composed of a channel steel cross frame 10, support legs 11 and angle steel 12, wherein the channel steel cross frame 10 is the main part for placing the spare rail 1, that is, the spare rail 1 can be placed on the frame of the channel steel cross frame 10, and the support legs 11 and angle steel 12 are mainly used to realize the suspended fixation of the channel steel cross frame 10.

[0027] Specifically, combined Figures 1 to 5 As shown, the outer end of the channel steel cross frame 10 is configured as an end face that matches the structural form of the inner wall surface of the shield segment, for example, the outer end of the channel steel cross frame 10 is configured as an inclined surface or a curved surface. Support legs 11 are provided at the inner bottom of the channel steel cross frame 10. The width of the support legs 11 is slightly smaller than the width of the plate gap between adjacent precast track plates 5, and the width of the main body of the channel steel cross frame 10 is slightly smaller than the width of the plate gap between adjacent precast track plates 5. This allows a portion of the channel steel cross frame 10 to extend into the plate gap between adjacent precast track plates 5, while allowing the support legs 11 to be supported on the reinforced concrete base 8 below the precast track plates 5. At this time, the channel steel cross frame 10 is supported and fixed by the shield pipe segment at one end and the reinforced concrete base 8 at the other end by its own weight, thereby achieving stable installation of the channel steel cross frame 10 body. Moreover, since part of the channel steel cross frame 10 extends into the plate gap between adjacent prefabricated track plates 5, the position of the channel steel cross frame 10 along the line direction (longitudinal direction) is limited, further improving its stability.

[0028] like Figure 4As shown, a narrow slot 14 is provided on the channel steel cross frame 10, and the length direction of the narrow slot 14 is in the same direction as the horizontal direction of the channel steel cross frame 10. Angle steel 12 is installed at the position of the narrow slot 14 by bolts 13. When the bolts 13 are loosened, the angle steel 12 can slide in the narrow slot 14 due to the limit of the bolts 13. When the bolts 13 are tightened, the angle steel 12 is firmly connected to the narrow slot 14. Figure 1 and Figure 2 As shown, after the channel steel cross frame 10 penetrates into the plate seam between adjacent prefabricated track plates 5, the sliding angle steel 12 is moved so that its vertical surface is in close contact with the outer end surface of the prefabricated track plate 5, and then the bolts 13 are tightened to fix the angle steel 12, so that the angle steel 12 always remains in close contact with the outer end surface of the prefabricated track plate 5, thereby limiting the position of the channel steel cross frame 10 in the vertical direction (transverse direction) along the line direction, and further improving its stability.

[0029] In this embodiment, the angle steel 12 is erected on the side surface of the channel steel cross frame 10, that is, the length of the close contact surface with the prefabricated track plate 5 is greater than the plate seam width between adjacent prefabricated track plates 5, thereby ensuring that the angle steel 12 can effectively fit on the outer end surface of the prefabricated track plate 5.

[0030] like Figure 1 As shown, the spare rail support 9 in this embodiment can be stably and securely installed between the shield segment and the reinforced concrete base 8 through structural design and is suspended above the ditch, thereby providing space for the spare rail 1. The spare rail 1 can be placed on the channel steel cross frame 10.

[0031] The spare rail support in this embodiment, when used, includes the following steps:

[0032] 1) Select the section of precast track slab bed within the shield segment where spare rails are required. Obtain information about the gap width between adjacent precast track slabs 5 and the number and height of spare rail supports 9 required for installation in this section. Once this information is obtained, fabricate channel steel cross braces 10 and angle steel 12 based on the gap width information. Also, fabricate support legs 11 based on the required height of the spare rails 1.

[0033] 2) Install a channel steel cross frame 10 at the plate seam position between each adjacent precast track plate 5, support one end of the channel steel cross frame 10 on the inner wall of the shield segment, and support the support foot 11 on the reinforced concrete base 8 between the adjacent precast track plates 5.

[0034] 3) Loosen the bolts 13 and adjust the position of the angle steel 12 on the channel steel cross frame 10 so that the angle steel 12 slides along the direction of the narrow slot 14 until the upright side of the angle steel 12 is in close contact with the outer end face of the prefabricated track plate 5. Tighten the bolts 13 to connect and fix the angle steel 12 to the narrow slot 14.

[0035] 4) Place the spare rail 1 on the channel steel cross frame 10.

[0036] 5) When spare rails 1 are required on both sides of the section, Figure 2 As shown, the spare rail supports in this embodiment are respectively installed on both sides of the prefabricated track plate.

[0037] During the specific implementation of this embodiment, in order to further ensure the quality and positional accuracy of the spare rail 1 and facilitate the implementation of automated operations, a limiting device or structure for the spare rail 1, such as a limiting baffle or limiting groove, may be further provided on the channel steel cross frame 10 to improve the positional accuracy and quality of the spare rail 1. Furthermore, since the spare rail bracket 9 in this embodiment can provide sufficient support for the spare rail 1, in some cases, the spare rail 1 can also be directly used for the passage of emergency repair equipment or trolleys, greatly improving passage efficiency, thereby indirectly improving emergency repair efficiency and shortening emergency repair time.

[0038] Since the spare rail support 9 in this embodiment is primarily constructed of steel components, in some cases, a retractable structure, such as a nested retractable structure, may be further provided on the channel steel cross frame 10 and the support legs 11, so that the spare rail support 9 as a whole has a certain degree of adjustability, allowing for corresponding adjustments based on actual working conditions and overcoming the effects of, for example, manufacturing and installation precision errors. Specifically, the retractable structure provided on the channel steel cross frame 10 allows the channel steel cross frame 10 to be retractable in the transverse direction, ensuring that its two ends are effectively and stably supported by the shield segments and the reinforced concrete base 8, respectively; and the retractable structure provided on the support legs 11 facilitates the height adjustment of the channel steel cross frame 10.

[0039] Although the above embodiments have described in detail the concepts and embodiments of the present invention with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, so they are not described in detail here.

Claims

1. A spare rail support suitable for use in prefabricated track slab sections, used for placing spare rails in shield tunnels, characterized by: The spare rail support includes a channel steel cross frame, one end of which matches the inner wall of the shield segment, and the bottom of the other end is provided with a support foot, which is used to support the channel steel cross frame. An angle steel is provided on the channel steel cross frame, which can slide laterally and be fixed in a certain position. One end of the channel steel cross frame matches the inner wall of the shield segment, which means that the end surface of the channel steel cross frame is set to a curved surface or an inclined surface that matches the inner wall of the shield segment; The channel steel cross frame is installed at the plate gap position between each adjacent prefabricated track plate. The frame width of the channel steel cross frame is not greater than the plate gap width between adjacent prefabricated track plates, and the frame length of the channel steel cross frame is sufficient to support the supporting legs on the roadbed base between adjacent prefabricated track plates.

2. The spare rail support suitable for prefabricated track slab roadbed sections according to claim 1, characterized in that: The channel steel cross frame is provided with a narrow slot, the length direction of the narrow slot is the transverse direction of the channel steel cross frame, one side of the angle steel can be connected to the narrow slot by bolts, and the other side is erected on the surface of the channel steel cross frame.

3. The spare rail support suitable for prefabricated track slab roadbed sections according to claim 1, characterized in that: The length of the angle steel is greater than the width of the plate gap between adjacent prefabricated track plates.

4. A method for installing a spare rail support suitable for a prefabricated track slab roadbed section according to any one of claims 1 to 3, characterized in that: The installation method includes the following steps: Select the section where spare rails need to be configured from the prefabricated track slab roadbed section within the shield segment; Install a channel steel cross frame at the plate gap between each adjacent precast track plate, support one end of the channel steel cross frame on the inner wall of the shield segment, and support the support foot at the bottom of the other end of the channel steel cross frame on the roadbed base between the adjacent precast track plates; Adjust the position of the angle steel on the channel steel cross frame so that the angle steel slides along the direction of the narrow and long slot until the upright side of the angle steel is in close contact with the outer end surface of the prefabricated track plate, and tighten the bolts to connect and fix the angle steel to the narrow and long slot; The spare rail is placed on the channel steel cross frame.

5. The method for installing a spare rail support suitable for a prefabricated track slab roadbed section according to claim 4, characterized in that: The placement height of the spare rail is adjusted by adjusting the height of the supporting feet.

6. The method for installing a spare rail support suitable for a prefabricated track slab roadbed section according to claim 4, characterized in that: The channel steel cross frames are respectively installed on both sides of the prefabricated track plate.

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