A simple device for reinforcing existing railway tunnels

Abstract

This invention discloses a simple device for reinforcing existing railway tunnels, belonging to the field of tunnel reinforcement technology. It comprises multiple arc-shaped steel hoop units connected end-to-end to form a closed-loop support structure tightly fitted to the inner arc surface of the existing tunnel segments. Each arc-shaped steel hoop unit has multiple mounting holes, the positions of which correspond to the grouting holes on the tunnel segments. A fixing component passes through the mounting holes and connects to the grouting holes to secure the arc-shaped steel hoop units to the tunnel segments. This invention saves costs, offers significant economic benefits, and features simple and quick processing and assembly of the arc-shaped channel steel. It offers high flexibility, is easy to operate manually, and is safe and reliable.

Description

Technical Field

[0001] This invention belongs to the field of tunnel reinforcement technology, and more specifically, relates to a simple device for reinforcing existing railway tunnels. Background Technology

[0002] When tunneling using the shield tunneling method, if the vertical clearance between the shield tunnel and an existing tunnel (not yet in operation) is less than one tunnel diameter, prestressed supports are typically used for reinforcement to ensure the safety of the existing tunnel and keep its deformation under control during the crossing. However, prestressed supports are difficult to transport, and their assembly and reinforcement are challenging, requiring a long assembly time for each ring, resulting in high labor costs and costs. Summary of the Invention

[0003] To solve the above problems, the present invention adopts the following technical solution: A simple device for reinforcing existing railway tunnels, comprising: Multiple arc-shaped steel hoop units are connected end to end in sequence to form a closed ring support structure that fits tightly against the inner arc surface of the existing tunnel segment. Multiple mounting holes are provided on the arc-shaped steel hoop units, and the positions of the mounting holes correspond to the positions of the grouting holes on the tunnel segment. A fixing member, which passes through the mounting hole and connects to the grouting hole, is used to fix the arc-shaped steel hoop unit to the segment.

[0004] Furthermore, each of the arc-shaped steel hoop units is provided with end plates at both ends, and each end plate is provided with holes and is connected and fixed by bolts. At least one end of the end plate has an elongated hole.

[0005] Furthermore, each of the aforementioned arc-shaped steel hoop units is made of bent steel profiles.

[0006] Furthermore, the thickness of the end plate is 1 cm.

[0007] Furthermore, the fixing component is a bolt, the mounting hole is a bolt hole, and a threaded sleeve is installed on the grouting hole. The bolt passes through the bolt hole and is screwed into the threaded sleeve for positioning and fixing.

[0008] Furthermore, the fixing member includes: A fixed cylinder, wherein the first end of the fixed cylinder is provided with an external threaded joint, and the second end is integrally formed or fixedly connected with a radial adjustment seat, wherein the radial adjustment seat is provided with a plurality of slides evenly distributed along its radial direction, and the extension direction of the slides is perpendicular to the axis of the fixed cylinder; A rotating rod is rotatably mounted inside the fixed cylinder via bearings, and both ends of the rotating rod extend to the outside of the fixed cylinder. A rotating handle is fixedly connected to the first end of the rotating rod. Multiple slide rods are provided, and multiple slide rods are correspondingly arranged with multiple slide tracks. The slide rods are L-shaped, with the first end slidably installed in the corresponding slide track. Each first end of the slide rod is connected to a limit block, and the second end extends along the axial direction of the radial adjustment seat, extending to the side of the radial adjustment seat away from the fixed cylinder. An adjusting disc is coaxially disposed on the side of the radial adjusting seat away from the fixed cylinder, and multiple guide grooves that cooperate with the slide rods are evenly formed along the circumference of the adjusting disc. The second end of the slide rod passes through the corresponding guide groove, and the guide groove is inclined, with the inclination angle adapted to the radial displacement stroke of the slide rod. The adjusting disc is connected to the second end of the rotating rod. By rotating the rotating handle, the adjusting disc can be rotated synchronously. By utilizing the sliding cooperation between the guide groove and the second end of the slide rod, multiple slide rods are driven to slide synchronously radially along the slide rail, thereby adjusting the inner diameter of the annular structure formed by the splicing of multiple limiting blocks. A fixed base is provided between the fixed cylinder and the rotating handle. The fixed base is adapted to the external threaded connector. The fixed cylinder and the fixed base can be quickly disassembled and fixed in position through the threaded engagement.

[0009] Furthermore, a protective cover is provided on the side of the adjusting disc away from the radial adjusting seat.

[0010] Furthermore, the outer surface of each limiting block is provided with an anti-slip layer.

[0011] The beneficial effects of this invention are: This invention saves costs and has significant economic benefits. The processing and assembly of arc-shaped channel steel is simple and quick, with high random flexibility, easy to operate manually, and safe and reliable.

[0012] The present invention is installed in the middle of the segment after forming a ring, which increases the overall rigidity of the formed tunnel.

[0013] The present invention connects a single annular channel steel to the original grouting hole of the pipe segment through the mounting hole, so that the inner arc surface of the pipe segment is in close contact with the circumferential support to form an integral whole, thereby increasing the stress state of the entire ring. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the installation of a simple device for reinforcing existing railway tunnels according to the present invention; Figure 2 This is a partial schematic diagram of a simple device for reinforcing existing railway tunnels according to the present invention; Figure 3 This is a schematic diagram of the fixing component in Embodiment 3 of a simple device for reinforcing existing railway tunnels according to the present invention. Figure 1 ; Figure 4This is a schematic diagram of the fixing component in Embodiment 3 of a simple device for reinforcing existing railway tunnels according to the present invention. Figure 2 .

[0015] In the figure: 1. Arc-shaped steel hoop unit; 2. End plate; 3. Fixing component; 4. Fixing cylinder; 5. Rotating rod; 6. Radial adjustment seat; 7. Slide rail; 8. Slide rod; 9. Limiting block; 10. Adjusting plate; 11. Guide groove; 12. Tube segment; 13. Fixed base. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0018] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0019] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0020] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0021] Example 1

[0022] refer to Figure 1 A simple device for reinforcing existing railway tunnels, comprising: Multiple arc-shaped steel hoop units 1 are connected end to end in sequence to form a closed ring support structure that is close to the inner arc surface of the existing tunnel segment 12. Multiple installation holes are opened on the arc-shaped steel hoop unit 1, and the positions of the installation holes correspond to the positions of the grouting holes on the segment 12. Fixing component 3 passes through the mounting hole and is connected to the grouting hole, used to fix the arc-shaped steel hoop unit 1 to the segment 12.

[0023] In this embodiment, each arc-shaped steel hoop unit 1 is provided with end plates 2 at both ends. The end plates 2 are provided with holes and are connected and fixed by bolts. At least one end plate 2 has a long hole to allow for adjustment.

[0024] Preferably, the thickness of end plate 2 is 1 cm.

[0025] In this embodiment, each arc-shaped steel hoop unit 1 is made of bent steel.

[0026] Preferably, the end plate is welded to the arc-shaped steel hoop unit.

[0027] Preferably, it is made of 20#a hot-rolled ordinary channel steel.

[0028] Preferably, the arc-shaped steel hoop unit 1 has an arc length of 2.879m and a radius of 2.75m.

[0029] Example 2

[0030] This embodiment is based on embodiment 1 with further modifications.

[0031] In this embodiment, the fixing component 3 is a bolt, the mounting hole is a bolt hole, and a threaded sleeve is installed on the grouting hole. The bolt passes through the bolt hole and is screwed into the threaded sleeve for positioning and fixing.

[0032] During installation, inspect and clean the inner arc surface and grouting holes of the existing tunnel segment 12 to ensure that the surface is flat and free of debris. Place the arc-shaped steel hoop units in the tunnel according to the design sequence, align the mounting holes on the arc-shaped steel hoop units with the grouting holes of the segments, and make them basically fit with the inner arc surface of the segments. Pass the bolts through the mounting holes and screw them into the threaded sleeves in the grouting holes to initially fix them but not completely tighten them for fine-tuning. Then, align the ends of multiple arc-shaped steel hoop units and connect them with bolts. Then, gradually tighten the connecting bolts so that multiple arc-shaped steel hoop units form a complete closed ring support structure.

[0033] In practice, if the mounting holes cannot be aligned with the grouting holes of segment 12, first ensure that the ends of multiple arc-shaped steel hoop units are aligned, and then align some mounting holes with the grouting holes of the segment.

[0034] Example 3

[0035] refer to Figures 1 to 4 This embodiment is a further modification of embodiment 1, and provides another structure for fixing member 3.

[0036] In this embodiment, the fixing component 3 includes: The fixed cylinder 4 has an external threaded connector at its first end and a radial adjustment seat 6 integrally formed or fixedly connected at its second end. The radial adjustment seat 6 has multiple slides 7 evenly opened along its radial direction, and the extension direction of the slides 7 is perpendicular to the axis of the fixed cylinder 4. Rotating rod 5 is rotatably mounted inside fixed cylinder 4 via bearing, and both ends of rotating rod 5 extend to the outside of fixed cylinder 4. A rotating handle is fixedly connected to the first end of rotating rod 5. Multiple slide rods 8 are provided, and multiple slide rails 7 are provided in correspondence. The slide rods 8 are L-shaped, with the first end slidably installed in the corresponding slide rail 7. The first end of each slide rod 8 is connected to a limit block 9, and the second end extends along the axial direction of the radial adjustment seat 6, extending to the side of the radial adjustment seat 6 away from the fixed cylinder 4. An adjusting disc 10 is coaxially disposed on the radial adjusting seat 6 away from the fixed cylinder 4. The adjusting disc 10 has multiple guide grooves 11 evenly distributed along the circumference to cooperate with the slide rods 8. The second end of the slide rod 8 passes through the corresponding guide groove 11. The guide groove 11 is inclined and the inclination angle is adapted to the radial displacement stroke of the slide rod 8. The adjusting disc 10 is connected to the end of the second end of the rotating rod 5. By rotating the rotating handle, the adjusting disc 10 can be driven to rotate synchronously. By utilizing the sliding cooperation between the guide groove 11 and the second end of the slide rod 8, multiple slide rods 8 are driven to slide synchronously radially along the slide rail 7, thereby adjusting the inner diameter of the annular structure formed by the splicing of multiple limiting blocks 9. The fixed base 13 is located between the fixed cylinder 4 and the rotating handle. The fixed base is compatible with the external threaded connector. The fixed cylinder 4 and the fixed base 13 can be quickly disassembled and fixed in position through the threaded connection.

[0037] In practice, the diameter of the fixed base 13 should be larger than the diameter of the mounting hole.

[0038] In this embodiment, a protective cover is provided on the side of the adjusting plate 10 away from the radial adjusting seat 6.

[0039] In this embodiment, the outer surface of the limiting block 9 is provided with an anti-slip layer.

[0040] During installation, the fixing component 3 is passed through the mounting hole and the grouting hole of the segment 12, so that the radial adjustment seat 6 passes completely through the grouting hole and reaches the soil layer side. The rotating handle is turned to drive the adjusting plate 10 to rotate relative to the fixing cylinder 4. The inclined guide groove 11 on the adjusting plate drives each sliding rod 8 to slide radially outward along the sliding track 7 until all the limit blocks 9 are pressed against the annular area outside the grouting hole to form a stable support. The fixing base 13 is aligned with the external threaded joint at the first end of the fixing cylinder 4, and the fixing base 13 is tightened to press it against the structural surface on the other side of the mounting hole to achieve overall locking. Then, the multiple arc-shaped steel hoop units are aligned end to end and connected by bolts. Then, the connecting bolts are gradually tightened so that the multiple arc-shaped steel hoop units form a complete closed annular support structure.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A simple device for reinforcing existing railway tunnels, characterized in that, include: Multiple arc-shaped steel hoop units are connected end to end in sequence to form a closed ring support structure that fits tightly against the inner arc surface of the existing tunnel segment. Multiple mounting holes are provided on the arc-shaped steel hoop units, and the positions of the mounting holes correspond to the positions of the grouting holes on the tunnel segment. A fixing member, which passes through the mounting hole and connects to the grouting hole, is used to fix the arc-shaped steel hoop unit to the segment.

2. A simple device for reinforcing existing railway tunnels according to claim 1, characterized in that, Each of the arc-shaped steel hoop units has end plates at both ends, and each end plate has holes and is connected and fixed by bolts. At least one end of the end plate has an elongated hole.

3. A simple device for reinforcing existing railway tunnels according to claim 2, characterized in that, Each of the aforementioned arc-shaped steel hoop units is made of bent steel profiles.

4. A simple device for reinforcing existing railway tunnels according to claim 3, characterized in that, The end plate has a thickness of 1 cm.

5. A simple device for reinforcing existing railway tunnels according to claim 4, characterized in that, The fixing component is a bolt, the mounting hole is a bolt hole, and a threaded sleeve is installed on the grouting hole. The bolt passes through the bolt hole and is screwed into the threaded sleeve for positioning and fixing.

6. A simple device for reinforcing existing railway tunnels according to claim 4, characterized in that, The fixing component includes: A fixed cylinder, wherein the first end of the fixed cylinder is provided with an external threaded joint, and the second end is integrally formed or fixedly connected with a radial adjustment seat, wherein the radial adjustment seat is provided with a plurality of slides evenly distributed along its radial direction, and the extension direction of the slides is perpendicular to the axis of the fixed cylinder; A rotating rod is rotatably mounted inside the fixed cylinder via bearings, and both ends of the rotating rod extend to the outside of the fixed cylinder. A rotating handle is fixedly connected to the first end of the rotating rod. Multiple slide rods are provided, and multiple slide rods are correspondingly arranged with multiple slide tracks. The slide rods are L-shaped, with the first end slidably installed in the corresponding slide track. Each first end of the slide rod is connected to a limit block, and the second end extends along the axial direction of the radial adjustment seat, extending to the side of the radial adjustment seat away from the fixed cylinder. An adjusting disc is coaxially disposed on the side of the radial adjusting seat away from the fixed cylinder, and multiple guide grooves that cooperate with the slide rods are evenly formed along the circumference of the adjusting disc. The second end of the slide rod passes through the corresponding guide groove, and the guide groove is inclined, with the inclination angle adapted to the radial displacement stroke of the slide rod. The adjusting disc is connected to the second end of the rotating rod. By rotating the rotating handle, the adjusting disc can be rotated synchronously. By utilizing the sliding cooperation between the guide groove and the second end of the slide rod, multiple slide rods are driven to slide synchronously radially along the slide rail, thereby adjusting the inner diameter of the annular structure formed by the splicing of multiple limiting blocks. A fixed base is provided between the fixed cylinder and the rotating handle. The fixed base is adapted to the external threaded connector. The fixed cylinder and the fixed base can be quickly disassembled and fixed in position through the threaded engagement.

7. A simple device for reinforcing existing railway tunnels according to claim 6, characterized in that, A protective cover is provided on the side of the adjusting plate away from the radial adjusting seat.

8. A simple device for reinforcing existing railway tunnels according to claim 6, characterized in that, The outer surface of each limiting block is provided with an anti-slip layer.

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