Multi-layer composite high-permeability modified shield segment

Abstract

The utility model relates to a multi-layer composite high-permeability modified shield segment, and belongs to the technical field of shield segments, the multi-layer composite high-permeability modified shield segment comprises a segment main body, a slot is formed in the left side of the segment main body, a butt joint strip is arranged on the right side of the segment main body, an insertion hole is formed in the top of the segment main body, and a positioning assembly is arranged in the insertion hole; the bottom of the duct piece body is further provided with an installation assembly matched with the positioning assembly. The positioning assembly comprises a supporting piece elastically installed in the duct piece body and a wedge-shaped clamping block fixedly connected to the outer wall of the supporting piece. According to the multi-layer composite high-permeability modified shield segment, convenience is provided for assembly, installation is convenient, the segment performance including high strength, rigidity, waterproofness, permeability adjustment and durability is remarkably improved, the multi-layer composite high-permeability modified shield segment is suitable for underground tunnel construction of complex geology, the multi-layer composite structural design is adopted, function complementation is achieved, it is ensured that the performance of the segment is stable in various environments, and the service life of the shield segment is prolonged. The service life is prolonged.

Description

Technical Field

[0001] This application relates to the field of tunnel boring machine (TBM) segment technology, and in particular to a multi-layer composite high-permeability modified TBM segment. Background Technology

[0002] Shield tunneling is a major construction method for underground engineering. Shield tunneling machines are widely used in tunnel projects for subways, railways, highways, municipal works, and hydropower projects. They offer numerous advantages, including high automation, labor savings, fast construction speed, one-time tunnel completion, and immunity to weather conditions. For example, in subway construction, shield tunneling machines use this method to excavate underground. While preventing collapse of the excavation face in soft soil or maintaining its stability, they safely perform tunnel excavation and lining operations inside the machine. Subway shield tunneling also features controlled ground settlement during excavation, reduced impact on surface buildings, and no disruption to surface traffic during underwater excavation.

[0003] Among them, shield tunnel segments are an important component of shield tunneling machines. Traditional shield tunnel segments are made of a single material, which has insufficient waterproofing and durability. Although new materials and technologies have improved the design, they are still insufficient under complex geological conditions. Existing shield tunnel segment designs are not waterproof and durable enough, making it difficult to operate stably under complex geological conditions. Due to the large weight of shield tunnel segments, transportation and installation are difficult, causing inconvenience in assembly. Therefore, a multi-layer composite high-permeability modified shield tunnel segment is proposed to solve the problems mentioned above. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a multi-layer composite high-permeability modified shield tunnel segment, which has the advantages of excellent segment performance and convenient assembly. It solves the problems of insufficient waterproofing and durability of existing shield tunnel segments, difficulty in stable operation under complex geological conditions, and inconvenient assembly caused by the large weight of shield tunnel segments and the difficulty in transportation and installation.

[0005] In summary, this application provides the following technical solution: a multi-layer composite high-permeability modified shield tunnel segment, including a segment body, a slot is provided on the left side of the segment body, a connecting strip is provided on the right side of the segment body, an insertion hole is provided on the top of the segment body, a positioning component is provided inside the insertion hole, and an installation component adapted to the positioning component is also provided at the bottom of the segment body.

[0006] The positioning component includes a support plate elastically installed inside the tube body and a wedge-shaped locking block fixedly connected to the outer wall of the support plate, the wedge-shaped locking block extending to the inner side of the insertion hole;

[0007] The installation assembly includes an installation rod fixedly installed at the bottom of the segment body and a wedge-shaped plug fixedly connected to the lower end of the installation rod. A sealing plate is provided at the upper end of the installation rod, and the sealing plate is adapted to the plug hole.

[0008] The main body of the tube segment consists of a high-strength fiber layer, a waterproof polymer layer, a permeability regulating layer, and a protective layer. The waterproof polymer layer is disposed on top of the high-strength fiber layer, the permeability regulating layer is disposed on top of the waterproof polymer layer, and the protective layer is disposed outside the permeability regulating layer.

[0009] This application, by adopting the above technical solution, facilitates the rapid docking of adjacent left and right tube segments through the cooperation of slots and docking strips, and facilitates the rapid docking of adjacent upper and lower tube segments through the cooperation of mounting components and insertion holes. After the upper and lower adjacent tube segments are docked, the wedge-shaped insert is limited by the cooperation of mounting components and positioning components, thereby achieving pre-fixation of adjacent tube segments, which facilitates subsequent welding work, provides convenience for assembly, and has good practicality.

[0010] Meanwhile, the main body of the tunnel segment consists of a high-strength fiber layer, a waterproof polymer layer, a permeability regulating layer, and a protective layer. The high-strength fiber layer, as the basic structural layer, is composed of high-strength carbon fiber cloth and is laid on the inner side of the segment, fixed with resin adhesive to form a solid foundation structure. The waterproof polymer layer is composed of a polyurethane waterproof membrane, which is sprayed or bonded onto the high-strength fiber layer to form a dense waterproof barrier. The permeability regulating layer is a mixture of nano-silica particles and expanded rubber, applied to the waterproof polymer layer by spraying or smearing. It can automatically adjust the permeability performance according to changes in groundwater level while maintaining a certain structural strength. The protective layer is the outermost layer, made of wear-resistant and corrosion-resistant polyethylene material, which is wrapped around the permeability regulating layer by hot pressing to prevent external environmental erosion of the internal structure. Through the above composition, the performance of the tunnel segment is significantly improved, including high strength, rigidity, waterproofness, permeability regulation, and durability. It is suitable for underground tunnel construction in complex geological conditions. The multi-layered composite structure design with complementary functions ensures stable performance of the segment in various environments, extends service life, reduces segment maintenance costs, reduces the number of repairs, and improves construction efficiency and safety.

[0011] Furthermore, the inner side of the slot is adapted to the mating strip, and the cross-section of the mating strip is trapezoidal.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the cooperation of the slot and the docking strip facilitates the quick docking of the main body of the adjacent segments on the left and right sides, which is convenient for installation.

[0013] Furthermore, a spring is fixedly connected to the side of the support plate away from the wedge-shaped block, and the end of the spring away from the support plate is fixedly connected to the interior of the tube body.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the position of the support plate can be easily adjusted by the spring, thereby realizing the position adjustment of the wedge-shaped block.

[0015] Furthermore, sliders are fixedly connected to both the upper and lower sides of the support plate, and the sliders are slidably connected inside the tube body.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the slider can guide the support plate, enabling the wedge-shaped block to maintain a stable movement trajectory and improving the stability of the structure.

[0017] Furthermore, a sliding groove is provided inside the main body of the tube segment, and the inner side of the sliding groove is adapted to the slider.

[0018] The beneficial effect of adopting the above-mentioned further solution is that the groove facilitates the sliding of the slider, and makes it easier for the support plate and wedge-shaped block to move.

[0019] Furthermore, the high-strength fiber layer is high-strength carbon fiber cloth, and the waterproof polymer layer is a polyurethane waterproof membrane.

[0020] The beneficial effects of adopting the above-mentioned further scheme are as follows: the high-strength fiber layer, as the basic structural layer, is composed of high-strength carbon fiber cloth and is laid on the inner side of the pipe segment. It is fixed by resin adhesive to form a solid basic structure. The waterproof polymer layer is composed of polyurethane waterproof membrane and is covered on the high-strength fiber layer by spraying or bonding to form a dense waterproof barrier.

[0021] Furthermore, the permeation conditioning layer comprises nano-silica particles and expanded rubber, and the protective layer is high-density polyethylene.

[0022] The beneficial effects of adopting the above-mentioned further solution are as follows: the permeability regulating layer is made of nano-silica particles and expanded rubber, and is applied to the waterproof polymer layer by spraying or smearing. It can automatically adjust the permeability performance according to the changes in groundwater level, while maintaining a certain structural strength. The protective layer is the outermost layer, which is made of wear-resistant and corrosion-resistant polyethylene material and is wrapped on the permeability regulating layer by hot pressing to prevent the external environment from eroding the internal structure.

[0023] Compared with the prior art, this application provides a multi-layer composite high-permeability modified shield tunnel segment, which has the following beneficial effects:

[0024] 1. This multi-layer composite high-permeability modified shield tunnel segment facilitates the rapid docking of adjacent left and right segments through the cooperation of slots and docking strips, and facilitates the rapid docking of adjacent upper and lower segments through the cooperation of installation components and insertion holes. After the upper and lower adjacent segments are docked, the wedge-shaped insert is limited by the cooperation of installation components and positioning components, thereby achieving pre-fixation of adjacent segments, which facilitates subsequent welding work, provides convenience for assembly, is easy to install, and has good practicality.

[0025] 2. This multi-layered composite high-permeability modified shield tunnel segment consists of a high-strength fiber layer, a waterproof polymer layer, a permeability regulating layer, and a protective layer. These components significantly improve the segment's performance, including high strength, rigidity, waterproofness, permeability regulation, and durability. It is suitable for underground tunnel construction in complex geological conditions. The multi-layered composite structure design provides complementary functions, ensuring stable performance under various environments, extending service life, reducing maintenance costs, decreasing repair frequency, and improving construction efficiency and safety. Attached Figure Description

[0026] Figure 1 This is a structural sectional view of this application;

[0027] Figure 2 This is a schematic diagram of the combination of the two main segments of this application;

[0028] Figure 3 This application Figure 2 A magnified structural diagram of structure A is shown below;

[0029] Figure 4 This is a top view of the main structure of the tunnel segment in this application;

[0030] Figure 5 This is a structural schematic diagram of the main body of the tunnel segment in this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Main body of the segment; 101. High-strength fiber layer; 102. Waterproof polymer layer; 103. Permeability conditioning layer; 104. Protective layer; 2. Slot; 3. Connecting strip; 4. Insertion hole; 5. Support plate; 6. Wedge-shaped block; 7. Mounting rod; 8. Wedge-shaped insert; 9. Spring; 10. Slider; 11. Slide groove; 12. Sealing plate. Detailed Implementation

[0033] Please see Figures 1 to 5This embodiment of a multi-layer composite high-permeability modified shield tunnel segment includes a segment body 1. A slot 2 is provided on the left side of the segment body 1, and a connecting strip 3 is provided on the right side. The inner side of the slot 2 is adapted to the connecting strip 3, and the cross-section of the connecting strip 3 is trapezoidal. The cooperation between the slot 2 and the connecting strip 3 facilitates quick docking of adjacent segment bodies 1, simplifying installation.

[0034] In this embodiment, the top of the segment body 1 is provided with an insertion hole 4, and a positioning component is provided inside the insertion hole 4. The positioning component includes a support piece 5 elastically installed inside the segment body 1 and a wedge-shaped locking block 6 fixedly connected to the outer wall of the support piece 5. The wedge-shaped locking block 6 extends to the inner side of the insertion hole 4. The bottom of the segment body 1 is also provided with an installation component adapted to the positioning component. The installation component includes an installation rod 7 fixedly installed at the bottom of the segment body 1 and a wedge-shaped insertion block 8 fixedly connected to the lower end of the installation rod 7. A sealing plate 12 is provided at the upper end of the installation rod 7, and the sealing plate 12 is adapted to the insertion hole 4.

[0035] Understandably, the cooperation between the slot 2 and the docking strip 3 facilitates the quick docking of adjacent left and right tube segments 1, and the cooperation between the mounting component and the socket 4 facilitates the quick docking of adjacent upper and lower tube segments 1. After the upper and lower adjacent tube segments 1 are docked, the cooperation between the mounting component and the positioning component, along with the wedge-shaped locking block 6, limits the wedge-shaped plug 8, thereby pre-fixing the adjacent tube segments 1, facilitating subsequent welding work, providing convenience for assembly, and demonstrating good practicality.

[0036] It should be noted that a spring 9 is fixedly connected to the side of the support plate 5 away from the wedge-shaped block 6. The end of the spring 9 away from the support plate 5 is fixedly connected to the interior of the tube body 1. The spring 9 facilitates the elastic adjustment of the position of the support plate 5, thereby achieving elastic adjustment of the position of the wedge-shaped block 6. In addition, sliders 10 are fixedly connected to both the upper and lower sides of the support plate 5. The sliders 10 are slidably connected inside the tube body 1. A groove 11 is provided inside the tube body 1, and the inner side of the groove 11 is adapted to the slider 10. The slider 10 guides the support plate 5, enabling the wedge-shaped block 6 to maintain a stable movement trajectory, thus improving the stability of the structure. The groove 11 facilitates the sliding of the slider 10, making it convenient for the support plate 5 and the wedge-shaped block 6 to move.

[0037] Please see Figure 5 In this embodiment, the main body 1 of the tube segment is composed of a high-strength fiber layer 101, a waterproof polymer layer 102, a permeation regulating layer 103 and a protective layer 104. The waterproof polymer layer 102 is disposed on the upper layer of the high-strength fiber layer 101, the permeation regulating layer 103 is disposed on the upper layer of the waterproof polymer layer 102, and the protective layer 104 is disposed on the outside of the permeation regulating layer 103.

[0038] The high-strength fiber layer 101 is composed of high-strength carbon fiber cloth, and the waterproof polymer layer 102 is a polyurethane waterproof membrane. The high-strength fiber layer 101, serving as the basic structural layer, is made of high-strength carbon fiber cloth and laid on the inner side of the pipe segment, fixed with resin adhesive to form a robust foundation structure. The waterproof polymer layer 102, composed of a polyurethane waterproof membrane, is applied over the high-strength fiber layer 101 by spraying or lamination, forming a dense waterproof barrier. Simultaneously, the permeability regulating layer 103 comprises nano-silica particles and expanded rubber, and the protective layer 104 is made of high-density polyethylene. The permeability regulating layer 103, composed of a mixture of nano-silica particles and expanded rubber, is applied over the waterproof polymer layer 102 by spraying or smearing, automatically adjusting permeability according to changes in groundwater level while maintaining structural strength. The protective layer 104, the outermost layer, is made of wear-resistant and corrosion-resistant polyethylene material and is wrapped around the permeability regulating layer 103 by hot-pressing, preventing external environmental erosion of the internal structure.

[0039] In this embodiment, the high-strength fiber layer 101 is made of high-modulus, high-strength carbon fiber cloth with a thickness of 0.5 mm and a density of 1760 kg / m³. The waterproof polymer layer 102 is a two-component reactive polyurethane waterproof membrane with a thickness of 1 mm and a tensile strength ≥10 MPa. The nano-silica particles in the permeability regulating layer 103 have a particle size of 10 nm to 100 nm and a purity ≥99.5%. The expanding rubber is EPDM rubber with an expansion ratio ≥300% and a temperature range of -40℃ to +120℃. The protective layer 104 is made of high-density polyethylene with a thickness of 2 mm and a tensile strength ≥20 MPa.

[0040] The segment body 1, composed of a high-strength fiber layer 101, a waterproof polymer layer 102, a permeability regulating layer 103, and a protective layer 104, significantly improves the performance of the segments, including high strength, rigidity, waterproofness, permeability regulation, and durability. It is suitable for underground tunnel construction in complex geological conditions. The multi-layered composite structure design with complementary functions ensures stable performance of the segments in various environments, extends service life, reduces segment maintenance costs, decreases the number of repairs, and improves construction efficiency and safety.

[0041] The working principle of the above embodiments is as follows:

[0042] In use, the slot 2 and the docking bar 3 facilitate the quick docking of adjacent left and right tube segments 1, and the mounting component and the socket 4 facilitate the quick docking of adjacent upper and lower tube segments 1. After the upper and lower adjacent tube segments 1 are docked, the mounting component and the positioning component work together to limit the wedge-shaped plug 8 by the wedge-shaped card block 6, thereby pre-fixing the adjacent tube segments 1, which facilitates the subsequent welding work and provides convenience for assembly.

[0043] The main body 1 of the pipe segment consists of a high-strength fiber layer 101, a waterproof polymer layer 102, a permeability regulating layer 103, and a protective layer 104. The high-strength fiber layer 101, as the basic structural layer, is composed of high-strength carbon fiber cloth and is laid on the inner side of the pipe segment. It is fixed by resin adhesive to form a solid basic structure. The waterproof polymer layer 102 is composed of polyurethane waterproof membrane and is covered on the high-strength fiber layer 101 by spraying or bonding to form a dense waterproof barrier. The permeability regulating layer 103 is composed of nano-silica particles and expanded rubber. It is applied on the waterproof polymer layer 102 by spraying or smearing and can automatically adjust the permeability performance according to the changes in groundwater level while maintaining a certain structural strength. The protective layer 104 is the outermost layer and is made of wear-resistant and corrosion-resistant polyethylene material. It is wrapped on the permeability regulating layer 103 by hot pressing to prevent the external environment from eroding the internal structure.

Claims

1. A multi-layer composite high-permeability modified shield tunnel segment, comprising a segment body (1), characterized in that: The tube body (1) has a slot (2) on the left side, a connecting strip (3) on the right side, an insertion hole (4) on the top, a positioning component inside the insertion hole (4), and an installation component adapted to the positioning component at the bottom of the tube body (1). The positioning assembly includes a support piece (5) elastically installed inside the tube body (1) and a wedge-shaped locking block (6) fixedly connected to the outer wall of the support piece (5), the wedge-shaped locking block (6) extending to the inner side of the insertion hole (4); The installation assembly includes an installation rod (7) fixedly installed at the bottom of the tube body (1) and a wedge-shaped plug (8) fixedly connected to the lower end of the installation rod (7). A sealing plate (12) is provided at the upper end of the installation rod (7), and the sealing plate (12) is adapted to the plug hole (4). The main body (1) of the tube segment is composed of a high-strength fiber layer (101), a waterproof polymer layer (102), a permeation regulating layer (103), and a protective layer (104). The waterproof polymer layer (102) is disposed on the upper layer of the high-strength fiber layer (101), the permeation regulating layer (103) is disposed on the upper layer of the waterproof polymer layer (102), and the protective layer (104) is disposed on the outside of the permeation regulating layer (103).

2. The multi-layer composite high-permeability modified shield tunnel segment according to claim 1, characterized in that: The inner side of the slot (2) is adapted to the mating bar (3), and the cross-section of the mating bar (3) is trapezoidal.

3. The multi-layer composite high-permeability modified shield tunnel segment according to claim 1, characterized in that: A spring (9) is fixedly connected to the side of the support plate (5) away from the wedge-shaped block (6), and the end of the spring (9) away from the support plate (5) is fixedly connected to the interior of the tube body (1).

4. The multi-layer composite high-permeability modified shield tunnel segment according to claim 1, characterized in that: The upper and lower sides of the support plate (5) are fixedly connected with sliders (10), and the sliders (10) are slidably connected inside the tube body (1).

5. The multi-layer composite high-permeability modified shield tunnel segment according to claim 4, characterized in that: The tube body (1) has a groove (11) inside, and the inner side of the groove (11) is adapted to the slider (10).

6. The multi-layer composite high-permeability modified shield tunnel segment according to claim 1, characterized in that: The high-strength fiber layer (101) is a high-strength carbon fiber cloth, and the waterproof polymer layer (102) is a polyurethane waterproof membrane.

7. The multi-layer composite high-permeability modified shield tunnel segment according to claim 1, characterized in that: The permeation conditioning layer (103) comprises nano-silica particles and expanded rubber, and the protective layer (104) is high-density polyethylene.

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