A special-shaped prefabricated sleeper and its application method

Abstract

The present invention relates to the field of urban rail transit technology, and in particular to a special-shaped prefabricated sleeper and an application method thereof, characterized in that it comprises a sleeper body, at least two pillars are arranged at the lower part of the sleeper body, and anchor bolt holes for installing rail fasteners are opened on the sleeper body at the position of the pillars, and the anchor bolt holes extend to the inside of the pillars. The advantages of the present invention are: it can ensure that the existing roadbed steel bars are not cut during the installation of the sleeper; the connection strength between the sleeper and the roadbed is high, and high-quality and high-stability sleeper installation can be achieved, and high-precision control of the track state can be achieved; the construction efficiency is improved, the construction time is shortened, and it has excellent economy.

Description

Technical Field

[0001] The invention relates to the technical field of urban rail transit, and in particular to a special-shaped prefabricated sleeper and an application method thereof. Background Art

[0002] As the service life and mileage of urban rail transit continue to increase, local structural failures of the sub-track foundation are increasing. In the past, the solution of chiseling out the partially failed sub-track foundation and re-casting on site was often adopted in the reconstruction, but there are problems such as the track state (superelevation, rail bottom slope) is difficult to control and the casting quality is difficult to ensure. The above problems can be solved by using prefabricated sleepers, but the conventional shape of reinforced concrete prefabricated sleepers requires cutting off the steel bars in the existing sub-track foundation to meet the installation space requirements, which destroys the existing structure. Summary of the invention

[0003] The purpose of the present invention is to provide a special-shaped prefabricated sleeper and an application method thereof in view of the above-mentioned deficiencies in the prior art, and to achieve the reconstruction construction of the sub-rail foundation without cutting the existing sub-rail foundation steel bars by designing the structure of the special-shaped prefabricated sleeper.

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

[0005] A special-shaped prefabricated sleeper, characterized in that it includes a sleeper body, at least two pillars are arranged at the lower part of the sleeper body, anchor bolt holes for installing rail fasteners are opened on the sleeper body at the position of the pillars, and the anchor bolt holes extend into the interior of the pillars.

[0006] The sleeper body is provided with a reserved hole for setting connecting steel bars.

[0007] The support column is cylindrical, and a slot is formed on the side of the sleeper body.

[0008] The pillar is in a rectangular parallelepiped shape, and a notch is provided on the pillar in the rectangular parallelepiped shape.

[0009] An application method of the above-mentioned special-shaped prefabricated sleeper is characterized in that: the application method is applied to the reconstruction construction of existing rail transit, the existing rail transit includes an existing track foundation, and existing steel bars are arranged in the existing track foundation. The application method at least includes the following steps: prefabricating special-shaped prefabricated sleepers according to the positions of the existing steel bars arranged in the existing track foundation, and the arrangement position of the pillars arranged at the bottom of the special-shaped prefabricated sleepers meets the requirement of avoiding the existing steel bars; arranging the special-shaped prefabricated sleepers above the existing track foundation through secondary pouring; and installing rails and the rail fasteners above the special-shaped prefabricated sleepers.

[0010] A reserved hole is provided on the special-shaped prefabricated sleeper, and connecting steel bars are arranged in the reserved hole so that the special-shaped prefabricated sleeper is connected to the existing under-rail foundation as a whole.

[0011] A mounting hole matched with the support is opened on the existing rail foundation, and the support is installed in the mounting hole to realize the positioning of the special-shaped prefabricated sleeper on the existing rail foundation.

[0012] The sleeper body of the special-shaped prefabricated sleeper is provided with slots on two vertical side surfaces along the line direction of the existing rail transit, and the slots are arranged along the entire length of the sleeper body.

[0013] The advantages of the present invention are: it can ensure that the existing ballast steel bars are not cut during the installation of the sleepers; the connection strength between the sleepers and the ballast is high, high-quality and high-stability sleeper installation can be achieved, and high-precision control of the track state can be achieved; the construction efficiency is improved, the construction time is shortened, and it has excellent economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the first structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the installation structure of the present invention;

[0016] Figure 3 This is a schematic diagram of the second structure of the present invention. DETAILED DESCRIPTION

[0017] 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:

[0018] like Figure 1-3 As shown in the figure, marks 1-12 respectively represent: special-shaped prefabricated sleeper 1, cylindrical support 2, anchor bolt hole 3, reserved hole 4, notch 5, existing rail foundation 6, existing steel bars 7, connecting steel bars 8, secondary casting 9, rail 10, rail fastener 11, rectangular support 12.

[0019] Embodiment 1: Figure 1As shown, the special-shaped prefabricated sleeper 1 in this embodiment includes its body, and two cylindrical pillars 2 are respectively arranged at the lower part of the sleeper body. The setting positions of the two cylindrical pillars 2 meet the requirements of matching the setting positions of the rail fasteners matched with the rails installed above the special-shaped prefabricated sleeper 1. Anchor bolt holes 3 are respectively opened at the corresponding positions of the two cylindrical pillars 2, and the anchor bolt holes 3 are used for installing and fixing the rail fasteners. Two reserved holes 4 are also arranged on the body of the special-shaped prefabricated sleeper 1. The two reserved holes 4 are used to install connecting steel bars, and the connecting steel bars are used to connect and fix the special-shaped prefabricated sleeper 1 to the existing under-rail foundation, thereby improving the integrity of the two and ensuring the structural strength and stability. Two notches 5 are symmetrically opened on the two side surfaces of the body of the special-shaped prefabricated sleeper 1. The two notches 5 are arranged through the length to strengthen the connection strength between the subsequent secondary casting body and the special-shaped prefabricated sleeper 1.

[0020] like Figure 2 As shown, the special-shaped prefabricated sleeper 1 in this embodiment is applied to the reconstruction construction of existing rail transit, wherein the existing rail transit structure includes an existing under-track foundation 6, and the existing under-track foundation 6 is provided with existing steel bars 7 arranged along the direction of the rail transit line for improving the integrity and strength.

[0021] The application method in this embodiment includes the following steps:

[0022] 1) Prefabricate the special-shaped prefabricated sleeper 1 according to the position of the existing steel bars 7 arranged in the existing rail foundation 6. Specifically, the positions of the two cylindrical pillars 2 and the reserved holes 4 are designed according to the positions of the existing steel bars 7. The positions of the cylindrical pillars 2 and the reserved holes 4 meet the requirement of avoiding the existing steel bars, thereby achieving installation without cutting the existing steel bars 7 or destroying the existing structure.

[0023] 2) A mounting hole matching the outer contour shape and size of the cylindrical support 2 is opened on the existing rail foundation 6; two cylindrical support pillars 2 are respectively installed in the mounting holes, and at this time, the special-shaped prefabricated sleeper 1 is quickly installed and positioned above the existing rail foundation 6.

[0024] 3) Connecting steel bars 8 are arranged at the positions of the two reserved holes 4 opened on the special-shaped prefabricated sleeper 1, and the other ends of the connecting steel bars 8 extend into the existing underrail foundation 6, so that the connecting steel bars 8 connect the special-shaped prefabricated sleeper 1 and the existing underrail foundation 6 into a whole.

[0025] 4) Concrete is poured around the periphery of the special-shaped prefabricated sleeper 1 to form a secondary cast body 9, which can further connect the special-shaped prefabricated sleeper 1 and the existing sub-rail foundation 6 thereunder into a whole. Since the special-shaped prefabricated sleeper 1 is provided with notches 5 on two vertical sides along the direction of the existing rail transit line, the secondary cast body 9 can enter the notch 5 to form a cast component of a convex structure, thereby further limiting the position of the special-shaped prefabricated sleeper 1 and strengthening the connection, thereby ensuring the integrity between the special-shaped prefabricated sleeper 1 and the existing sub-rail foundation 6.

[0026] 5) Install the rail 10 and the rail fastener 11 above the special-shaped prefabricated sleeper 1. The rail fastener 11 is used to install and fix the rail 10. The anchor bolts of the rail fastener 11 are screwed into the anchor bolt holes 3 provided on the special-shaped prefabricated sleeper 1 to complete the installation of the rail 10.

[0027] Embodiment 2: The difference between this embodiment and embodiment 1 is that the pillars at the lower part of the special-shaped prefabricated sleeper 1 in this embodiment are rectangular pillars 12, and the grooves 5 of the special-shaped prefabricated sleeper 1 are provided on both side surfaces of the rectangular pillars 12. In this way, there is no need to equip the connecting steel bars 8 as in embodiment 1 to ensure the effective connection between the special-shaped prefabricated sleeper 1 and the existing sub-rail foundation 6.

[0028] The above embodiment can ensure that the existing ballast steel bars are not cut during the installation of the sleepers; the connection strength between the sleepers and the ballast is high, achieving high-quality and high-stability sleeper installation, and at the same time achieving high-precision control of the track state; improving construction efficiency, shortening construction time, and having excellent economy.

[0029] Although the above embodiments have described the concepts and embodiments of the present invention in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and changes 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 special-shaped prefabricated sleeper, characterized in that: It comprises a sleeper body, wherein at least two pillars are arranged at the lower part of the sleeper body, anchor bolt holes for installing rail fasteners are opened on the sleeper body at the position of the pillars, and the anchor bolt holes extend into the interior of the pillars; reserved holes for setting connecting steel bars are opened on the sleeper body; the arrangement positions of the pillars and the reserved holes meet the requirement of avoiding the existing steel bars in the foundation under the existing rail.

2. The special-shaped prefabricated sleeper according to claim 1, characterized in that: The support column is cylindrical, and a slot is formed on the side of the sleeper body.

3. The special-shaped prefabricated sleeper according to claim 1, characterized in that: The pillar is in a rectangular parallelepiped shape, and a notch is provided on the pillar in the rectangular parallelepiped shape.

4. An application method of the special-shaped prefabricated sleeper according to any one of claims 1 to 3, characterized in that: The application method is applied to the reconstruction construction of existing rail transit, wherein the existing rail transit includes an existing under-track foundation, and existing steel bars are arranged in the existing under-track foundation. The application method includes at least the following steps: Prefabricate special-shaped prefabricated sleepers according to the positions of existing steel bars arranged in the foundation under the existing rail, and the arrangement positions of the pillars arranged at the bottom of the special-shaped prefabricated sleepers meet the requirement of avoiding the existing steel bars; Arranging the special-shaped prefabricated sleeper above the existing rail foundation by secondary pouring; The rails and the rail fasteners are installed above the special-shaped prefabricated sleepers.

5. The application method of the special-shaped prefabricated sleeper according to claim 4, characterized in that: A reserved hole is provided on the special-shaped prefabricated sleeper, and connecting steel bars are arranged in the reserved hole so that the special-shaped prefabricated sleeper is connected to the existing under-rail foundation as a whole.

6. The application method of the special-shaped prefabricated sleeper according to claim 4, characterized in that: A mounting hole matched with the support is opened on the existing rail foundation, and the support is installed in the mounting hole to realize the positioning of the special-shaped prefabricated sleeper on the existing rail foundation.

7. The application method of the special-shaped prefabricated sleeper according to claim 4, characterized in that: The sleeper body of the special-shaped prefabricated sleeper is provided with slots on two vertical side surfaces along the line direction of the existing rail transit, and the slots are arranged along the entire length of the sleeper body.

Images