Device for strengthening connection of duct piece and ballast bed

Abstract

The utility model discloses a device for strengthening the connection of a duct piece and a ballast bed, which comprises a connector, a cylindrical screw rod and an anchoring head, the connector is positioned at the lower part of the device and is used for realizing the connection with a duct piece bolt; the anchoring head is located on the upper portion of the device and embedded in a ballast bed. Compared with the prior art, the utility model has the positive effects that an integrated connecting device is adopted, one end of the integrated connecting device is a connector matched with a pipe piece hand hole, the other end of the integrated connecting device is a conical anchoring head poured in ballast bed concrete, and the middle of the integrated connecting device is of a cylindrical rod body structure. The connecting structure is simple in structure, good in manufacturability, convenient to construct, good in universality and reliable in connection, the connecting capacity of the ballast bed and the duct piece is enhanced, and the situation that the duct piece is disengaged from the ballast bed is effectively reduced.

Description

Technical Field

[0001] The utility model relates to a connecting device for a track transportation ballast and a pipe segment, which is used for strengthening the connecting capacity between the ballast and the pipe segment. Background Art

[0002] At present, most sections of urban rail transit use shield tunnels. Since some shield tunnels are located in typical soft soil areas, uneven settlement is prone to occur in some sections. Shield tunnels are generally laid with ballastless tracks. The ballastless track bed is directly cast on the shield segment. There is no effective connection between the two. Due to geological settlement or vibration during rail transit operation, the segment and the bed are prone to emptying, which seriously affects the operation safety of rail transit. Although there are currently some solutions for connecting the segment and the bed, some solutions have complex structures and cumbersome installation, which is not conducive to efficient construction; some solutions have poor processability of parts and high production costs; some solutions have poor versatility and require changes to the traditional segment structure. Based on this, there is currently no device for connecting the segment and the bed that has been widely used. Therefore, it is of great significance to develop a universal device for strengthening the connection that is easy and quick to install and can effectively prevent the segment and the bed from emptying, which is of great significance to ensure the safe operation of rail transit. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the utility model proposes a device for strengthening the connection between the segment and the ballast bed, thereby strengthening the connection capacity between the ballast bed and the segment and effectively reducing the situation where the segment and the ballast bed are detached.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a device for strengthening the connection between the pipe segment and the ballast bed, comprising a connecting head, a cylindrical screw and an anchor head, wherein the connecting head is located at the lower part of the device and is used to realize the connection with the pipe segment bolts; the anchor head is located at the upper part of the device and is pre-buried in the ballast bed.

[0005] Furthermore, the connecting head is a flat pre-tightening head formed by flattening and bending and adapted to the hand hole of the pipe segment.

[0006] Furthermore, the anchoring head is a conical anchoring head.

[0007] Furthermore, a punching hole matching with the segment bolt is provided in the middle of the connecting head.

[0008] Furthermore, the thickness of the connecting head is the same as the thickness of the flat washer on the segment bolt.

[0009] Furthermore, the connecting head, the cylindrical screw and the anchoring head are an integrated structure.

[0010] Furthermore, the connecting head is installed on the segment bolts and tightened with nuts.

[0011] Compared with the prior art, the positive effects of the utility model are:

[0012] The utility model adopts an integrated connection device, one end of which is a connection head adapted to the hand hole of the pipe segment, the other end is a conical anchor head cast in the roadbed concrete, and the middle is a cylindrical rod structure. The utility model has a simple structure, good processability, convenient construction, good versatility, and reliable connection. The specific advantages are as follows:

[0013] 1. The coupling device is an integrated structure with one part, which is easy to install: This device has only one part. During use, you only need to use an electric tool wrench to remove the segment bolts and nuts, take out the original gaskets, and vertically install the coupling device on the segment bolts (the thickness of the connector is consistent with the flat washers, which replace the original flat washers), and then tighten them with an electric wrench. The integrated device has a simple structure, a single part, and is easy and quick to install with low labor intensity.

[0014] 2. The coupling device has a simple structure and good production processability: the flat pre-tightening head is adapted to the hand hole of the pipe segment by flattening and bending. A hole is punched in the middle of the flat pre-tightening head to cooperate with the pipe segment bolt, and then pre-tightened by a nut to ensure that the existing structure of the pipe segment remains unchanged.

[0015] 3. Simple processing technology and low cost: The processing of the connection device can be completed by cutting → connecting head forming → conical anchor head forming → drilling. Each process is simple and efficient, so the processability is good and the production cost is low.

[0016] 4. The connection between the coupling device, the pipe segment and the ballast bed is reliable: the lower connecting head of the coupling device is connected to the pipe segment with bolts and the nuts are tightened, which can effectively prevent the deviation during concrete pouring; the upper conical anchor head is pre-buried in the ballast bed, and the conical structure can effectively improve the anchor bearing capacity, thereby strengthening the connection ability between the pipe segment and the ballast bed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0018] Figure 1 It is a structural schematic diagram of the device of the utility model;

[0019] Figure 2 This is a diagram showing the connection between the device of the utility model and the pipe segment and the ballast bed;

[0020] Figure 3 for Figure 2 AA section view;

[0021] Figure 4 for Figure 3 B is a partial enlarged view;

[0022] The reference numerals in the figure include: connecting head 1, cylindrical screw 2, conical anchor head 3, segment 4, rail 5, coupling device 6, ballast bed 7, segment bolt 8, nut 9, flat washer 10, segment hand hole 11. DETAILED DESCRIPTION

[0023] A device for strengthening the connection between the pipe segment and the ballast bed (hereinafter referred to as the connection device), the structure is as follows Figure 1 As shown, it includes: a connecting head 1, a cylindrical screw 2, and a conical anchoring head 3.

[0024] like Figures 2 to 4 As shown, the rail transit shield tunnel includes a segment 4, on which a hand hole for installing the segment bolts is provided. A reinforced concrete ballast bed 7 is provided on the surface of the segment 4, and a rail 5 is provided above the reinforced concrete ballast bed 7. The punched hole in the middle of the connecting head 1 of the coupling device 6 is installed on the segment bolt 8, installed at the position of the original flat washer 10, replacing the original flat washer, and adapted to the segment hand hole 11 on the segment 4, and pre-tightened by a nut 9; the conical anchor head 3 of the coupling device 6 is cast in the concrete of the ballast bed 7.

[0025] The installation method of this device is:

[0026] a) Tunnel construction: early segment 4 installation, segment bolt 8 installation, grouting, plugging of grouting holes, etc.

[0027] b) Loosen the nuts: determine the segment bolts 8 that need to be connected to the ballast bed 7, and use an electric tool to loosen the nuts 9 and flat washers 10. If the segment bolts are single-headed, you need to remove the segment bolts.

[0028] Specifically, if the segment bolts to be connected to the ballast bed are single-headed, the segment bolts must first be completely removed from the segment hand hole, and then the connecting head must be placed at the position of the original flat washer, and then the segment bolts without the flat washer must be installed in the segment hand hole, and finally the nut must be tightened.

[0029] c) Installation of the coupling device: Use the connector 1 to replace the flat washer 10 of the segment bolt 8, install it on the segment bolt 8, place the cylindrical screw 2 of the coupling device 6 axially vertically, and tighten the nut 9 using an electric tool.

[0030] d) Roadbed reinforcement laying: Roadbed reinforcement shall be laid according to the design requirements.

[0031] e) Pouring: When pouring concrete and vibrating, avoid knocking the coupling device 6 out of shape.

[0032] The working principle of this utility model:

[0033] Due to the influence of geological movement or external forces during rail transit operation, if the reinforcing connection device is not installed, the pipe segment 4 and the ballast 7 are connected only by the bonding strength of the new and old concrete interfaces, and the pipe segment and the ballast are very easy to be detached. When the reinforcing connection device 6 is installed, since one end of the connection device is pre-buried in the ballast 7 and the other end is connected to the pipe segment bolt 8, the ballast 7 and the pipe segment bolt 8 are connected in the vertical direction. When the pipe segment 4 is subjected to the downward force, the force will be transmitted to the connection device 6. Since the anchoring end of the connection device is cast in the ballast concrete, the connection device transmits the force to the ballast 7, driving the ballast to move downward together, thereby strengthening the connection and reducing the detachment of the concrete interface between the ballast and the pipe segment.

Claims

1. A device for strengthening the connection between a segment and a ballast bed, characterized in that: It includes a connecting head, a cylindrical screw and an anchoring head. The connecting head is located at the lower part of the device and is used to achieve connection with the segment bolts; the anchoring head is located at the upper part of the device and is pre-buried in the ballast bed.

2. A device for strengthening the connection between a segment and a ballast bed according to claim 1, characterized in that: The connecting head is a flat pre-tightening head formed by flattening and bending and adapted to the hand hole of the pipe segment.

3. The device for strengthening the connection between the segment and the ballast bed according to claim 1, characterized in that: The anchoring head is a conical anchoring head.

4. The device for strengthening the connection between the segment and the ballast bed according to claim 1, characterized in that: A punching hole matched with the segment bolt is arranged in the middle of the connecting head.

5. The device for strengthening the connection between the segment and the ballast bed according to claim 1, characterized in that: The thickness of the connecting head is the same as the thickness of the flat washer on the segment bolt.

6. The device for strengthening the connection between the segment and the ballast bed according to claim 1, characterized in that: The connecting head, the cylindrical screw and the anchoring head are an integrated structure.

7. The device for strengthening the connection between the segment and the ballast bed according to claim 1, characterized in that: The connecting head is installed on the segment bolts and is tightened by nuts.

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