Variable thickness main tunnel special lining segment with water stop device

Abstract

The utility model discloses a special lining ring pipe piece of variable thickness main hole with water stop device, including mutually assembled special reinforced concrete ring pipe piece and mutually assembled ordinary reinforced concrete ring pipe piece, the special reinforced concrete ring pipe piece includes non cutting department pipe piece and cuttable department pipe piece, and the non cutting department pipe piece includes inner arc surface steel web and outer arc surface steel backplate, and the arc end surface steel plate is equipped between one end surface between inner arc surface steel web and outer arc surface steel backplate and the tunnel lining pipe piece hole mouth, and the concrete is poured between inner arc surface steel web, outer arc surface steel backplate and end surface steel plate, and the end surface steel plate is equipped with the recess for accommodating water stop gasbag, the cuttable department pipe piece sets up at the outside end of end surface steel plate arc surface, and the thickness of cuttable department pipe piece is less than the thickness of non cutting department pipe piece, the utility model has the intensive space, avoids water stop device and pours ring beam after invading building limit, reduces the concrete breaking square amount, saves breaking operation time and the like advantages.

Description

Technical Field

[0001] This utility model relates to the field of tunnel connecting passage technology, specifically a special lining ring segment for a main tunnel with variable thickness and a water-stopping device. Background Technology

[0002] With the rapid development of urban rail transit, large underground spaces, and urban tunnels, shield tunneling has become a widely used mainstream construction method for underground passages. To enhance emergency evacuation capabilities, transverse connecting passages are typically required between twin-track shield tunnels. When constructing transverse passages within the main tunnel using mechanical methods, temporary water-stopping devices must be externally installed on the segments at the starting and receiving points, or steel sleeves must be installed with temporary water-stopping devices inside the sleeves. These temporary water-stopping devices are generally made of rubber curtains or airbags, and the required horizontal length is typically over 40cm. Figure 1 The diagram shows the existing connection structure between the connecting passage and the tunnel lining segment opening. Because the connecting passage 800 is generally buried at a considerable depth, it is impossible to reinforce the ground at the starting and receiving ends of the tunnel lining segment 700 opening in advance. For connecting passages 800 in areas with high water pressure, even after the completion of small shield tunneling or small pipe jacking, directly removing the water-stopping device 900 still poses a significant risk of water inrush. It is more prudent to permanently seal the water-stopping device inside an external ring beam. However, the distance between the inner contour of the main tunnel segment and the building clearance is limited. The external water-stopping device 900 and subsequent sealing will encroach on the building clearance, which is not permitted by industry standards.

[0003] Patent publication number CN222066758U discloses a mechanical method for constructing a lining segment structure for a connecting passage. Specifically, it discloses that a cuttable panel is provided at the opening of the lining segment, eliminating the need for later cutting of certain areas and avoiding waste of steel reinforcement materials. However, it has problems such as the installation of water-stopping devices on the lining segments and the encroachment of the post-cast ring beam on the building clearance, insufficient sealing space, large volume of concrete removal, and long removal time. Utility Model Content

[0004] The technical problem this utility model aims to solve is to overcome the existing defects and provide a special lining ring segment for the main tunnel with variable thickness and a water-stopping device. The water-stopping airbag is set inside the non-cutting segment, which compresses space and prevents the water-stopping device and the post-cast ring beam from encroaching on the building clearance, thus solving the problem of insufficient sealing space. Moreover, the thickness of the cuttable segment is half that of the non-cutting segment, creating a construction space that is conducive to the installation of the water-stopping device and the implementation of permanent sealing, reducing the amount of concrete to be removed when mechanically accessing the main tunnel segment, and saving demolition time. This can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a special reinforced concrete ring segment for a variable-thickness main tunnel with a water-stopping device, comprising a special reinforced concrete ring segment assembled with each other at the tunnel lining segment opening and ordinary reinforced concrete ring segments assembled with each other around the tunnel lining segment opening. The external shape of the special reinforced concrete ring segment is the same as that of the ordinary reinforced concrete ring segment. The special reinforced concrete ring segment includes a non-cutting segment and a cuttable segment, and the non-cutting segment includes an inner arc surface. The inner arc-shaped steel web and outer arc-shaped steel back plate are connected by an arc-shaped end plate between the inner arc-shaped steel web and the outer arc-shaped steel back plate at one end face of the tunnel lining segment opening. Concrete is poured between the inner arc-shaped steel web, the outer arc-shaped steel back plate and the end plate. The end plate has a groove for accommodating the water-stopping airbag. The cuttable segment is located at the outer end of the arc-shaped end plate. The cuttable segment and the non-cuttable segment are connected to each other by glass fiber reinforcement. The thickness of the cuttable segment is less than the thickness of the non-cuttable segment.

[0006] Furthermore, the cuttable segment is made of UHPC ultra-high performance concrete, and the thickness of the cuttable segment is half the thickness of the non-cuttable segment.

[0007] Furthermore, a circumferential steel rib is welded between the inner arc-shaped steel web and the outer arc-shaped steel back plate, and a longitudinal steel rib is welded onto the circumferential steel rib.

[0008] Furthermore, steel studs are welded to the inner arc-shaped steel web, the outer arc-shaped steel back plate, the circumferential steel ribs, the longitudinal steel ribs, and the end face steel plates.

[0009] Furthermore, the inner arc surface of the non-cutting section segment is provided with inclined bolt hand holes; the inner arc surface of the cuttable section segment is provided with bent bolt hand holes.

[0010] Furthermore, a sealing plate is fixedly provided at the opening of the groove in the end face steel plate, and an inflation port is provided on one side wall of the groove in the end face steel plate, through which the inflation nozzle of the water-stop airbag passes.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This variable-thickness main tunnel special lining ring segment with water-stopping device has water-stopping airbags set inside the non-cutting segment, which compresses space and prevents the water-stopping device and post-cast ring beam from intruding into the building clearance, thus solving the problem of insufficient sealing space; the cuttable segment is made of UHPC ultra-high performance concrete, which has high compressive and tensile strength, high elastic modulus, and good structural strength and stability; moreover, the thickness of the cuttable segment is half the thickness of the non-cutting segment, creating a construction space that is conducive to the installation of the water-stopping device and the construction of permanent sealing, reducing the amount of concrete to be removed when mechanically accessing the main tunnel segment, and saving demolition time. Attached Figure Description

[0012] Figure 1 A schematic diagram of the structure connecting the existing connecting passage with the tunnel lining segment opening;

[0013] Figure 2 This is a schematic diagram of the special lining ring segment structure for the main tunnel of this utility model;

[0014] Figure 3 This is a frontal schematic diagram of the special lining ring segment of the main tunnel of this utility model located at the tunnel entrance.

[0015] Figure 4 This is a schematic diagram of the special ring segment structure of this utility model;

[0016] Figure 5 This is a front view of the inner arc surface of the special ring segment of this utility model;

[0017] Figure 6 This is a front view of the outer arc surface of the special annular segment of this utility model;

[0018] Figure 7 This is a cross-sectional view of section AA of this utility model;

[0019] Figure 8 This is a cross-sectional view of the BB section of this utility model;

[0020] Figure 9 This is a cross-sectional view of the CC section of this utility model.

[0021] In the diagram: 1. Ordinary reinforced concrete ring segment; 2. Special reinforced concrete ring segment; 21. Non-cutting segment; 211. Inner arc steel web; 212. Outer arc steel back plate; 213. Circumferential steel rib; 214. Longitudinal steel rib; 215. End face steel plate; 2151. Sealing plate; 216. Steel stud; 217. Angle bolt handhole; 22. Cuttable segment; 221. Bent bolt handhole; 3. Fiberglass reinforcement; 4. Water-stopping airbag; 41. Inflation nozzle; 700. Tunnel lining segment; 800. Connecting passage; 900. Water-stopping device. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example

[0024] Please see Figure 2-4This utility model provides a technical solution: a variable-thickness special lining ring segment for the main tunnel with a water-stopping device, comprising a special reinforced concrete ring segment 2 assembled with each other at the tunnel lining segment 700 opening and an ordinary reinforced concrete ring segment 1 assembled with each other around the tunnel lining segment 700 opening. The external shape of the special reinforced concrete ring segment 2 is the same as that of the ordinary reinforced concrete ring segment 1. The thickness of the cuttable segment 22 is less than the thickness of the non-cuttable segment 21. In this embodiment, the cuttable segment 22 is made of UHPC ultra-high performance concrete, which has high compressive and tensile strength, high elastic modulus, and good structural strength and stability. Moreover, the thickness of the cuttable segment 22 is half the thickness of the non-cuttable segment 21, creating a construction space that is conducive to the installation of the water-stopping device and the construction of permanent sealing, reducing the amount of concrete to be removed when mechanically accessing the main tunnel segment, and saving the time of removal work.

[0025] Please refer to the following: Figure 4-6 The special reinforced concrete ring segment 2 includes a non-cuttable segment 21 and a cuttable segment 22. The non-cuttable segment 21 includes an inner arc-shaped steel web 211 and an outer arc-shaped steel back plate 212. A circumferential steel rib 213 is welded between the inner arc-shaped steel web 211 and the outer arc-shaped steel back plate 212, and a longitudinal steel rib 214 is welded on the circumferential steel rib 213. The inner arc-shaped steel web 211 and the outer arc-shaped steel back plate 212 are located at the tunnel lining segment 70. An arc-shaped end face steel plate 215 is provided between the two ends of the opening at point 0; concrete is poured between the inner arc steel web plate 211, the outer arc steel back plate 212, the circumferential steel rib plate 213, the longitudinal steel rib plate 214 and the end face steel plate 215; the non-cutting section segment 21 is a steel plate-concrete composite structure with high compressive and bending resistance, which overcomes the stress concentration after the segment is broken and greatly improves the safety of the connecting passage 800 during the construction and operation periods;

[0026] Please see Figure 7-9 The cuttable section 22 is disposed on the outer end of the arc surface of the end face steel plate 215, and the cuttable section 22 and the non-cuttable section 21 are connected to each other by glass fiber reinforcement 3.

[0027] The end face steel plate 215 is provided with a groove for accommodating the water-stop airbag 4. A sealing plate 2151 is fixedly provided at the opening of the groove of the end face steel plate 215. An inflation port is provided on one side wall of the groove of the end face steel plate 215. The inflation nozzle 41 of the water-stop airbag 4 passes through the inflation port. In this embodiment, the water-stop airbag 4 is used as a water-stopping device. The water-stop airbag 4 is set in the non-cutting section of the tube segment 21, which saves space and avoids the water-stopping device and the post-cast ring beam from intruding into the building limit, thus solving the problem of insufficient sealing space.

[0028] Steel studs 216 are welded onto the inner arc steel web 211, outer arc steel back plate 212, circumferential steel rib 213, longitudinal steel rib 214, and end face steel plate 215. The steel studs 216 enhance the bond strength between the steel plate and the concrete, thereby improving the structural strength of the special reinforced concrete ring segment 2. The inner arc steel web 211 of the non-cutting segment 21 is provided with inclined bolt hand holes 217; the inner arc surface of the cuttable segment 22 is provided with bent bolt hand holes 221.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A special reinforced concrete ring segment for a main tunnel with a variable thickness and a water-stopping device, comprising a special reinforced concrete ring segment assembled with each other at the tunnel lining segment opening and ordinary reinforced concrete ring segments assembled with each other around the tunnel lining segment opening, wherein the external shape of the special reinforced concrete ring segment is the same as that of the ordinary reinforced concrete ring segment; characterized in that: The special reinforced concrete ring segment includes non-cutting segments and cuttable segments. The non-cutting segments include an inner arc-shaped steel web and an outer arc-shaped steel back plate. An arc-shaped end plate is provided between the inner arc-shaped steel web and the outer arc-shaped steel back plate at one end face of the tunnel lining segment opening. Concrete is poured between the inner arc-shaped steel web, the outer arc-shaped steel back plate, and the end plate. The end plate has a groove for accommodating water-stopping airbags. The cuttable segments are located at the outer end of the arc-shaped surface of the end plate. The cuttable segments and the non-cutting segments are connected to each other by glass fiber reinforcement, and the thickness of the cuttable segments is less than the thickness of the non-cutting segments.

2. The special lining ring segment with variable thickness main tunnel and water-stopping device according to claim 1, characterized in that: The cuttable segment is made of UHPC ultra-high performance concrete, and the thickness of the cuttable segment is half the thickness of the non-cuttable segment.

3. A special lining ring segment with a water-stopping device for a variable thickness main tunnel according to claim 1, characterized in that: A circumferential steel rib is welded between the inner arc-shaped steel web and the outer arc-shaped steel back plate, and a longitudinal steel rib is welded onto the circumferential steel rib.

4. A special lining ring segment with a water-stopping device for a variable thickness main tunnel according to claim 3, characterized in that: Steel studs are welded to the inner arc-shaped steel web, outer arc-shaped steel back plate, circumferential steel ribs, longitudinal steel ribs, and end face steel plates.

5. A special lining ring segment with a water-stopping device for a variable thickness main tunnel according to claim 1, characterized in that: The inner arc surface of the non-cutting section segment has inclined bolt hand holes; the inner arc surface of the cuttable section segment has bent bolt hand holes.

6. A special lining ring segment for a main tunnel with a water-stopping device according to claim 1, characterized in that: A sealing plate is fixedly installed at the opening of the groove in the end face steel plate, and an inflation port is opened on one side wall of the groove in the end face steel plate, through which the inflation nozzle of the water-stop airbag passes.

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