Hollow ribbed interlayer prefabricated tunnel segment capable of dynamically adjusting self weight
By setting water injection channels inside the hollow concrete shell of precast tunnel segments, the self-weight can be dynamically adjusted, solving the problems of floating and settling of precast tunnel segments, improving construction safety and efficiency, and reducing costs.
Patent Information
- Application Number
- CN202520442649.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-03-13
AI Technical Summary
Existing precast tunnel segments are prone to floating and settling in underwater tunnels or areas with high groundwater levels due to their uncontrollable weight, which affects the quality and safety of tunnel projects.
By setting up water injection channels inside the hollow concrete shell, the weight of the tunnel segments can be dynamically adjusted by increasing or decreasing the weight of the segments through water injection or drainage, thus overcoming floating and settlement.
It has improved the deformation resistance of tunnel segments, solved the problems of floating and settling of tunnel lining segments, improved construction safety and efficiency, and reduced material and transportation costs.
Smart Images
Figure CN223676274U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to prefabricated tunnel segment technology field especially relates to a hollow rib sandwich prefabricated tunnel segment of dynamic regulation deadweight. BACKGROUND
[0002] Shield tunnel excavation technology is widely used in urban rail transit, railway, highway, water conservancy and other aspects due to its excellent construction safety, high efficiency, high applicability and low environmental impact disturbance. Shield segment is the main assembly structure of shield tunnel excavation. As the permanent lining structure of shield tunnel, the quality of shield segment will directly affect the overall quality and safety of the tunnel. In order to further improve the tunnel excavation efficiency, the shield segment usually adopts prefabricated tunnel segment. The prefabricated tunnel segment is a shield segment manufactured in advance in the factory by using standardized production process. It forms the main structure of the tunnel by assembling in the shield construction tunnel, and bears the ground load and the force of supporting the soil layer.
[0003] The existing prefabricated tunnel segment usually adopts solid concrete structure. Although the solid concrete structure has high strength, its deadweight is uncontrollable. For underwater tunnels or areas with high underground water level, the floating and settlement of prefabricated tunnel segment is a common problem in tunnel engineering. The floating and settlement of prefabricated tunnel segment usually occurs in the process of shield grouting excavation of segment, or under the influence of underground water level fluctuation. The floating and settlement of prefabricated tunnel segment is mainly affected by many factors such as water pressure, so its external factors are inevitable. Therefore, reasonable deadweight design of prefabricated tunnel segment is the most direct control means to control such influence. UTILITY MODEL CONTENTS
[0004] In view of the defects in the prior art, the utility model provides a hollow rib sandwich prefabricated tunnel segment with dynamic deadweight adjustment, which solves the problem that the existing prefabricated tunnel segment cannot overcome floating and settlement.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] A hollow rib sandwich prefabricated tunnel segment with dynamic deadweight adjustment, comprising a plurality of tunnel lining segments in a fan ring structure, and the plurality of tunnel lining segments can be connected to form a complete ring.
[0007] The tunnel lining segment comprises a concrete hollow shell, and a rib sandwich is arranged inside the concrete hollow shell; a water injection channel is arranged on the inner side of the concrete hollow shell.
[0008] In the scheme, water is injected into the concrete hollow shell through the water injection channel to increase the overall self weight of the segment, and the water in the concrete hollow shell is discharged through the water injection channel to reduce the overall self weight of the segment; the design can increase the self weight of the tunnel to resist the floating trend when the tunnel floats, and can slow down the settlement trend when the tunnel settles; the dynamic adjustment of the self weight of the tunnel lining segment is realized, and the toughness of the tunnel lining structure formed by the segments in dealing with the floating and settlement of the segments is improved.
[0009] Further, the concrete hollow shell comprises an inner arc plate and an outer arc plate, and the two ends of the inner arc plate and the outer arc plate are connected with annular partition plates, and the two sides of the inner arc plate and the outer arc plate are connected with longitudinal partition plates; the annular partition plates of adjacent two concrete hollow shells are connected; the rib sandwich layer is arranged between the inner arc plate and the outer arc plate.
[0010] In the scheme, the hollow structure of the prefabricated tunnel segment is realized, so that the water for increasing and decreasing the self weight can be contained in the interior.
[0011] Further, the water injection channel is a water injection hole, and the water injection hole is arranged on the inner arc plate; the water injection hole is sealed with a water injection piston.
[0012] In the scheme, the water injection hole is directly arranged, and the water injection hole is sealed with the water injection piston, and the structure of the inner arc plate is simple, and the preparation process is simple.
[0013] Further, the two connected annular partition plates are respectively provided with tenons and mortises, and the tenons are inserted into the mortises.
[0014] In the scheme, the two adjacent tunnel lining segments are directly assembled together through the mortise and tenon structure, and the assembly is simple; after assembly, the strength is high and the integrity is strong.
[0015] Further, the tunnel lining segment is provided with six pieces, and the six pieces of tunnel lining segments are spliced into a complete ring; the six pieces of tunnel lining segments comprise three standard pieces of segments, two adjacent pieces of segments and one top sealing piece of segment, the three standard pieces of segments are connected in sequence to form an arc structure, and the two ends of the arc structure are connected with the two adjacent pieces of segments respectively; the two adjacent pieces of segments are connected through the top sealing piece of segment.
[0016] Further, the rib sandwich layer comprises a plurality of ribs, and the plurality of ribs are distributed at equal intervals along the arc length direction of the tunnel lining segment.
[0017] Further, the rib is a sawtooth structure, and the inner side and the outer side of the sawtooth structure are connected with the inner arc plate and the outer arc plate respectively; the sawtooth structures of adjacent two ribs are staggered with each other.
[0018] In the scheme, the ribs are designed as a zigzag structure, so that the stability and compression resistance of the triangle can be effectively utilized to support the inner arc plate and the outer arc plate, and the strength of the overall structure of the pipe piece is enhanced; the adjacent zigzag structures are staggered to avoid stress concentration.
[0019] Further, the ribs are in a wave shape structure; the wave shape structures of the adjacent two ribs are staggered.
[0020] In the scheme, the ribs are designed as a wave shape structure, so that the high bearing capacity of the arch shape is effectively utilized, and the supporting capacity of the inner arc plate to the outer arc plate is enhanced.
[0021] The utility model discloses the beneficial effect is:
[0022] The hollow ribbed sandwich prefabricated tunnel pipe piece of the utility model can dynamically adjust the settlement of the tunnel pipe piece in the affected area, improve the anti-deformation capacity of the tunnel, reasonably reduce the material cost and the pipe piece transportation cost, reduce the construction risk of the super large concrete pipe piece, reduce the construction difficulty, and improve the construction safety. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is the structure schematic diagram of the utility model kind of hollow ribbed sandwich prefabricated tunnel pipe piece of dynamic adjustment self weight;
[0024] Figure 2 It is the internal structure schematic diagram of the utility model kind of hollow ribbed sandwich prefabricated tunnel pipe piece of dynamic adjustment self weight;
[0025] Figure 3 It is the structure schematic diagram of the utility model tunnel lining pipe piece end tenon and mortise;
[0026] Figure 4This is a schematic diagram of the distribution structure of the six tunnel lining segments in this utility model;
[0027] Figure 5 This is a schematic diagram of the rib structure with a wave-shaped shape in this utility model.
[0028] Figure label:
[0029] 1. Tunnel lining segments; 11. Hollow concrete shell; 111. Inner arc plate; 112. Outer arc plate; 113. Circumferential diaphragm; 114. Longitudinal diaphragm; 115. Tenon; 116. Mortise; 12. Rib interlayer; 121. Rib; 13. Water injection channel; 131. Water injection hole; 132. Water injection piston; 21. Standard segment block; 22. Adjacent segment block; 23. Capping segment block; Detailed Implementation
[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The specific embodiments of the present invention are described below to facilitate understanding by those skilled in the art. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they fall within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.
[0031] like Figure 1 As shown, this embodiment provides a hollow ribbed precast tunnel segment with dynamically adjustable self-weight. This precast tunnel segment can dynamically adjust its self-weight by injecting water into it, thereby overcoming the floating and settling of the precast tunnel segment; specifically, it includes:
[0032] Several tunnel lining segments 1 in a fan-shaped ring structure can be spliced together to form a complete ring.
[0033] like Figure 2 As shown, the tunnel lining segment 1 includes a hollow concrete shell 11, with a ribbed interlayer 12 inside the hollow concrete shell 11; a water injection channel 13 is provided on the inner side of the hollow concrete shell 11. Water is injected into the hollow concrete shell 11 through the water injection channel 13 to increase the overall self-weight of the segment, and water is drained from the hollow concrete shell 11 through the water injection channel 13 to reduce the overall self-weight of the segment; this design allows water to be injected to increase its self-weight and resist the upward floating trend when the tunnel floats, and to drain water to slow down the settlement trend when the tunnel settles; thus realizing the dynamic adjustment of the self-weight of the precast tunnel segment.
[0034] The concrete hollow shell 11 comprises an inner arc plate 111 and an outer arc plate 112, both ends of the inner arc plate 111 and the outer arc plate 112 are connected with annular partition plates 113, and both sides of the inner arc plate 111 and the outer arc plate 112 are connected with longitudinal partition plates 114; the annular partition plates 113 of adjacent two concrete hollow shells 11 are connected; the rib sandwich layer 12 is arranged between the inner arc plate 111 and the outer arc plate 112; the design realizes the hollow structure of the prefabricated tunnel segment, so that the inside can contain water for increasing or decreasing the dead weight.
[0035] The water injection channel 13 is a water injection hole 131, the water injection hole 131 is arranged on the inner arc plate 111; the water injection hole 131 is blocked by a water injection piston 132; the water injection hole 131 is directly arranged, and the water injection hole 131 is blocked by the water injection piston 132, the structure of the inner arc plate 111 is simple, and the preparation process is simple.
[0036] As shown in Figure 3 The two connected annular partition plates 113 are respectively provided with tenons 115 and mortises 116, and the tenon 115 is inserted into the mortise 116. The adjacent two tunnel lining segments 1 are directly assembled together through the mortise and tenon structure, which is simple to assemble; after assembly, the strength is high and the integrity is strong.
[0037] As shown in Figure 4 The tunnel lining segment 1 is provided with six blocks, and the six tunnel lining segments 1 are spliced into a complete ring; the six tunnel lining segments 1 comprise three standard block segments 21, two adjacent block segments 22 and one capping block segment 23, the three standard block segments 21 are connected in sequence to form an arc structure, and the two ends of the arc structure are connected with the two adjacent block segments 22 respectively; the two adjacent block segments 22 are connected through the capping block segment 23.
[0038] The rib sandwich layer 12 comprises a plurality of ribs 121, and the plurality of ribs 121 are distributed at equal intervals along the arc length direction of the tunnel lining segment 1.
[0039] As a preferred embodiment of the present embodiment, the rib 121 is in a zigzag structure, the inner side and the outer side of the zigzag structure are connected with the inner arc plate 111 and the outer arc plate 112 respectively; the zigzag structures of adjacent two ribs 121 are staggered with each other; the rib 121 is designed in a zigzag structure, so that the stability and the compression resistance of the triangle can be effectively utilized to support the inner arc plate 111 and the outer arc plate 112, and the strength of the overall structure of the segment is enhanced; the adjacent zigzag structures are distributed in a staggered manner to avoid stress concentration.
[0040] As another embodiment of the present embodiment, the rib 121 is in a wave structure; the wave structures of adjacent two ribs 121 are staggered with each other; the rib 121 is designed in a wave structure, which effectively utilizes the high bearing capacity of the arch shape and enhances the supporting capacity of the inner arc plate 111 to the outer arc plate 112.
[0041] Those skilled in the art will understand that the embodiments described herein are for the purpose of helping the reader understand the principles of the present application, and should be understood as not limiting the scope of the present application to such specific embodiments and examples. Those skilled in the art can make various other specific modifications and combinations according to the technical inspiration of the present application without departing from the spirit of the present application, and these modifications and combinations are still within the scope of the present application.
Claims
1. A hollow ribbed precast tunnel segment with dynamically adjustable self-weight, characterized in that: It includes several tunnel lining segments (1) in a fan-shaped ring structure, and the several tunnel lining segments (1) can be spliced into a complete ring; The tunnel lining segment (1) includes a hollow concrete shell (11), and a ribbed interlayer (12) is provided inside the hollow concrete shell (11); a water injection channel (13) is provided on the inner side of the hollow concrete shell (11).
2. The hollow ribbed precast tunnel segment with dynamically adjustable self-weight according to claim 1, characterized in that: The hollow concrete shell (11) includes an inner arc plate (111) and an outer arc plate (112). Both ends of the inner arc plate (111) and the outer arc plate (112) are connected to circumferential partitions (113). Both sides of the inner arc plate (111) and the outer arc plate (112) are connected to longitudinal partitions (114). The circumferential partitions (113) of two adjacent hollow concrete shells (11) are connected. The rib sandwich layer (12) is disposed between the inner arc plate (111) and the outer arc plate (112).
3. The hollow ribbed precast tunnel segment with dynamically adjustable self-weight according to claim 2, characterized in that: The water injection channel (13) is a water injection hole (131), which is opened on the inner arc plate (111); a water injection piston (132) is sealed inside the water injection hole (131).
4. The hollow ribbed precast tunnel segment with dynamically adjustable self-weight according to claim 2, characterized in that: The two connected circumferential partitions (113) are respectively provided with tenons (115) and mortises (116), and the tenons (115) are inserted into the mortises (116).
5. The hollow ribbed precast tunnel segment with dynamically adjustable self-weight according to claim 2, characterized in that: The tunnel lining segment (1) consists of six segments, which are spliced together to form a complete ring. The six tunnel lining segments (1) include three standard segments (21), two adjacent segments (22), and one capping segment (23). The three standard segments (21) are connected in sequence to form an arc structure, and the two ends of the arc structure are respectively connected to the two adjacent segments (22). The two adjacent segments (22) are connected to each other through the capping segment (23).
6. The hollow ribbed precast tunnel segment with dynamically adjustable self-weight according to claim 2, characterized in that: The rib interlayer (12) includes a plurality of ribs (121), which are distributed at equal intervals along the arc length direction of the tunnel lining segment (1).
7. The hollow ribbed precast tunnel segment with dynamically adjustable self-weight according to claim 6, characterized in that: The rib (121) has a serrated structure, and the inner and outer sides of the serrated structure are respectively connected to the inner arc plate (111) and the outer arc plate (112); the serrations of two adjacent ribs (121) are staggered.
8. The hollow ribbed precast tunnel segment with dynamically adjustable self-weight according to claim 6, characterized in that: The rib (121) has a wavy structure; the wavy structures of two adjacent ribs (121) are staggered.