Shield tunnel anti-floating control structure

Abstract

The utility model relates to the technical field of tunnel anti-floating, in particular to a shield tunnel anti-floating control structure which comprises a tunnel body, a supporting mechanism is fixedly connected to the top of the tunnel body, an anti-floating layer is arranged on the top of the supporting mechanism, and two buffering mechanisms are fixedly installed at the bottom of the tunnel body and are arranged in a bilateral symmetry mode. According to the shield tunnel anti-floating control structure, through the design of the tunnel main body bottom buffering mechanism and the tunnel main body top supporting mechanism, the displacement of the tunnel main body when the tunnel main body is stressed can be effectively reduced, and no matter facing an upper load or a lower buoyancy force, the anti-floating control structure can be used for preventing the tunnel main body from floating. The tunnel main body can adapt to different use environments by adjusting the buffer assembly, the adaptability and flexibility of the tunnel main body are improved, in addition, abrasion and fatigue damage of the tunnel main body are reduced, the overall stability and deformation resistance are enhanced, it is ensured that the tunnel main body can be effectively protected under various load conditions, and the service life of the tunnel main body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel anti-floating, in particular to an anti-floating control structure for a shield tunnel. Background Art

[0002] In urban infrastructure construction, shield tunnels, as crucial underground passages, face the challenges of complex geological conditions and changing environmental factors. Especially in areas with high groundwater levels or weak soils, tunnels are highly susceptible to groundwater buoyancy during construction and operation, potentially leading to structural instability or even floating. Traditional tunnel designs often rely on increasing tunnel weight or implementing drainage measures to counteract buoyancy. However, these methods not only increase construction difficulty and cost but may also have limited effectiveness under certain geological conditions. Therefore, we propose a shield tunnel anti-floating control structure. Utility Model Content

[0003] The main purpose of the utility model is to provide an anti-floating control structure for a shield tunnel, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A shield tunnel anti-floating control structure includes a tunnel body, a support mechanism fixedly connected to the top of the tunnel body, an anti-floating layer provided on the top of the support mechanism, and two buffer mechanisms fixedly installed on the bottom of the tunnel body, and the two buffer mechanisms are symmetrically arranged on the left and right.

[0006] The support mechanism includes a bottom support plate and a top support plate, the bottom support plate is fixedly connected to the top of the tunnel body, the top of the bottom support plate is fixedly connected to a No. 1 connecting plate, the bottom of the top support plate is fixedly connected to a No. 2 connecting plate, and a plurality of No. 1 buffer assemblies are arranged between the No. 1 connecting plate and the No. 2 connecting plate, and the plurality of No. 1 buffer assemblies are arranged at equal distances in the longitudinal direction.

[0007] Preferably, a plurality of buffer grooves are provided on the top of the No. 1 connecting plate, and two buffer grooves are grouped together and distributed on the left and right sides, and the anti-floating layer is fixedly connected to the top of the top support plate.

[0008] Preferably, the No. 1 buffer assembly includes a fixed ear, which is fixedly installed on the bottom of the No. 2 connecting plate, and the front and rear sides of the bottom of the fixed ear are movably connected with buffer rods, and the lower parts of the two buffer rods are movably installed with connecting ears, and the lower ends of the connecting ears are fixedly installed with moving blocks, and the lower ends of the moving blocks are fixedly connected with buffer blocks adapted to the buffer grooves.

[0009] By adopting the above technical solution: using the No. 1 buffer component to disperse and absorb external forces, reducing the wear and fatigue damage of the tunnel body, thereby enhancing the overall stability and anti-deformation ability.

[0010] Preferably, the buffer block is slidably connected in the buffer groove, one end of the buffer block is fixedly connected to a No. 1 spring, and one end of the No. 1 spring away from the buffer block is fixedly connected to the inner wall of the buffer groove.

[0011] By adopting the above technical solution: the pressure causes the buffer rod to drive the moving block and the buffer block to slide in the buffer groove, compressing the No. 1 spring. At this time, the No. 1 spring stores elastic potential energy. The elastic action of the No. 1 spring can offset part of the pressure and reduce the impact directly transmitted to the tunnel body.

[0012] Preferably, the buffer mechanism includes a U-shaped base, and an L-shaped mounting frame is fixedly installed on one side of the two U-shaped bases away from the opposite ends, and a reinforcing rib is fixedly connected inside the L-shaped mounting frame. A plurality of sliding grooves are provided on the left and right sides of the inner surface of the U-shaped base, and a No. 2 buffer assembly is slidably installed in the two sliding grooves located in the same horizontal plane.

[0013] Preferably, the No. 2 buffer assembly includes a buffer plate, and sliders adapted to the slide groove are integrally formed on both the left and right ends of the buffer plate. The buffer plate is slidably connected to the U-shaped base through the sliders on both sides. A No. 2 spring is fixedly installed at the lower end of the buffer plate, and the bottom of the No. 2 spring is fixedly connected to the inner wall of the U-shaped base.

[0014] By adopting the above technical solution: when the force is transmitted to the No. 2 buffer assembly, the buffer plate slides along the slide groove, and at the same time, the No. 2 spring is compressed to generate elastic potential energy, thereby offsetting the force applied to the tunnel body.

[0015] Preferably, the bottom of the tunnel body passes through the upper end of the U-shaped base and is fixedly connected to the top of the buffer plate, and the width of the lower end surface of the tunnel body is smaller than the width of the upper end surface of the buffer plate.

[0016] By adopting the above technical solution, the buffer plate is prevented from slipping out of the U-shaped base, thereby improving stability.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The design of the buffer mechanism at the bottom of the tunnel body and the support mechanism at the top of the tunnel body effectively reduces the displacement of the tunnel body when subjected to stress. Whether facing loads from above or buoyancy from below, the anti-floating control structure can adapt to different operating environments by adjusting the buffer components, improving its adaptability and flexibility. In addition, it also optimizes the interaction between the tunnel body and the surrounding geological environment, making it more adaptable to complex underground construction conditions.

[0019] 2. A dual buffer structure consisting of No. 1 and No. 2 buffer components is adopted. The buffer components are used to disperse and absorb external forces, reducing wear and fatigue damage to the tunnel body, thereby enhancing the overall stability and anti-deformation ability, ensuring that the tunnel body can be effectively protected under various load conditions and extending the service life of the tunnel body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a shield tunnel anti-floating control structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of a support mechanism for an anti-floating control structure of a shield tunnel according to the present invention;

[0022] Figure 3 This is a structural schematic diagram of a No. 1 buffer component of an anti-floating control structure for a shield tunnel according to the present invention;

[0023] Figure 4 This is a structural diagram of a buffer mechanism of an anti-floating control structure for a shield tunnel according to the present invention;

[0024] Figure 5 This is a structural schematic diagram of the No. 2 buffer component of the anti-floating control structure of a shield tunnel in the utility model.

[0025] In the figure: 1. Tunnel body; 2. Support mechanism; 21. Bottom support plate; 22. Top support plate; 23. Connecting plate No. 1; 231. Buffer groove; 24. Connecting plate No. 2; 25. Buffer assembly No. 1; 251. Fixing ear; 252. Buffer rod; 253. Connecting ear; 254. Moving block; 255. Buffer block; 256. Spring No. 1; 3. Anti-floating layer; 4. Buffer mechanism; 41. U-shaped base; 42. L-shaped mounting frame; 43. Reinforcement rib; 44. Slide groove; 45. Buffer assembly No. 2; 451. Buffer plate; 452. Slider; 453. Spring No. 2. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] See also Figure 1-5 The utility model provides an anti-floating control structure for a shield tunnel, comprising a tunnel body 1, a support mechanism 2 fixedly connected to the top of the tunnel body 1, an anti-floating layer 3 provided on the top of the support mechanism 2, and two buffer mechanisms 4 fixedly installed on the bottom of the tunnel body 1, and the two buffer mechanisms 4 are symmetrically arranged on the left and right.

[0028] In this embodiment, the support mechanism 2 includes a bottom support plate 21 and a top support plate 22. The bottom support plate 21 is fixedly connected to the top of the tunnel body 1. The top of the bottom support plate 21 is fixedly connected to a No. 1 connecting plate 23. The bottom of the top support plate 22 is fixedly connected to a No. 2 connecting plate 24. A plurality of No. 1 buffer components 25 are arranged between the No. 1 connecting plate 23 and the No. 2 connecting plate 24, and the plurality of No. 1 buffer components 25 are arranged at equal distances in the longitudinal direction; a plurality of buffer grooves 231 are provided on the top of the No. 1 connecting plate 23, and two buffer grooves 231 are distributed in the left and right directions as a group. The anti-floating layer 3 is fixedly connected to the top of the top support plate 22; No. 1 buffer The component 25 includes a fixed ear 251, which is fixedly installed on the bottom of the No. 2 connecting plate 24. The front and rear sides of the bottom of the fixed ear 251 are movably connected with buffer rods 252. The lower parts of the two buffer rods 252 are movably installed with connecting ears 253. The lower ends of the connecting ears 253 are fixedly installed with moving blocks 254. The lower ends of the moving blocks 254 are fixedly connected with buffer blocks 255 that are adapted to the buffer groove 231. The buffer block 255 is slidably connected in the buffer groove 231. One end of the buffer block 255 is fixedly connected to the No. 1 spring 256. The end of the No. 1 spring 256 away from the buffer block 255 is fixedly connected to the inner wall of the buffer groove 231.

[0029] Through the above scheme: when the road surface is subjected to a large gravity, a part of the force will be transmitted to the inside of the support mechanism 2. At this time, the multiple No. 1 buffer components 25 between the bottom support plate 21 and the top support plate 22 begin to play a role. The pressure causes the buffer rod 252 to drive the moving block 254 and the buffer block 255 to slide in the buffer groove 231, compressing the No. 1 spring 256. At this time, the No. 1 spring 256 stores elastic potential energy. The elastic action of the No. 1 spring 256 can offset part of the pressure and reduce the impact directly transmitted to the tunnel body 1.

[0030] In this embodiment, the buffer mechanism 4 includes a U-shaped base 41, and an L-shaped mounting frame 42 is fixedly installed on one side of the two U-shaped bases 41 away from the opposite ends, and a reinforcing rib 43 is fixedly connected to the L-shaped mounting frame 42. A plurality of slide grooves 44 are provided on the left and right sides of the inner surface of the U-shaped base 41, and a No. 2 buffer component 45 is slidably installed in the two slide grooves 44 located in the same horizontal plane; the No. 2 buffer component 45 includes a buffer plate 451, and the left and right ends of the buffer plate 451 are integrally formed with sliders 452 that are adapted to the slide grooves 44. The buffer plate 451 is slidably connected to the U-shaped base 41 through the sliders 452 on both sides, and the lower end of the buffer plate 451 is fixedly installed with a No. 2 spring 453, and the bottom of the No. 2 spring 453 is fixedly connected to the inner wall of the U-shaped base 41; the bottom of the tunnel main body 1 passes through the upper end of the U-shaped base 41 and is fixedly connected to the top of the buffer plate 451, and the width of the lower end face of the tunnel main body 1 is smaller than the width of the upper end face of the buffer plate 451.

[0031] Through the above scheme: when the bottom of the tunnel body 1 is subjected to force from below, such as changes in soil pressure or groundwater buoyancy, the force is transmitted to the buffer mechanism 4 through the tunnel body 1. The U-shaped base 41 and L-shaped mounting frame 42 in the buffer mechanism 4 provide stable structural support. The force is transmitted to the No. 2 buffer assembly 45, causing the buffer plate 451 to slide along the slide groove 44. At the same time, the No. 2 spring 453 is compressed to generate elastic potential energy, thereby offsetting the force applied to the tunnel body 1.

[0032] It should be noted that the present invention is an anti-floating control structure for a shield tunnel. During use, when the road surface is subjected to a large gravity, a portion of the force will be transmitted to the interior of the support mechanism 2. At this time, the multiple No. 1 buffer components 25 between the bottom support plate 21 and the top support plate 22 begin to play a role. The pressure causes the buffer rod 252 to drive the moving block 254 and the buffer block 255 to slide in the buffer groove 231, compressing the No. 1 spring 256. At this time, the No. 1 spring 256 stores elastic potential energy. The elastic action of the No. 1 spring 256 can offset part of the pressure and reduce the impact directly transmitted to the tunnel body 1. When the tunnel When the bottom of the tunnel body 1 is subjected to force from below, such as changes in soil pressure or groundwater buoyancy, the force is transmitted to the buffer mechanism 4 through the tunnel body 1. The U-shaped base 41 and L-shaped mounting frame 42 in the buffer mechanism 4 provide stable structural support. The force is transmitted to the No. 2 buffer assembly 45, causing the buffer plate 451 to slide along the slide groove 44. At the same time, the No. 2 spring 453 is compressed to generate elastic potential energy, thereby offsetting the force applied to the tunnel body 1. The upper and lower layers of the buffer mechanism are used to enhance the stability and anti-deformation ability of the tunnel body 1, thereby ensuring that the tunnel body 1 can be effectively protected under various load conditions.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A shield tunnel anti-floating control structure, comprising a tunnel body (1), characterized in that: The top of the tunnel body (1) is fixedly connected to a support mechanism (2), the top of the support mechanism (2) is provided with an anti-floating layer (3), and the bottom of the tunnel body (1) is fixedly installed with two buffer mechanisms (4), and the two buffer mechanisms (4) are arranged in a bilaterally symmetrical manner; The support mechanism (2) comprises a bottom support plate (21) and a top support plate (22), wherein the bottom support plate (21) is fixedly connected to the top of the tunnel body (1), a No. 1 connecting plate (23) is fixedly connected to the top of the bottom support plate (21), and a No. 2 connecting plate (24) is fixedly connected to the bottom of the top support plate (22), and a plurality of No. 1 buffer assemblies (25) are arranged between the No. 1 connecting plate (23) and the No. 2 connecting plate (24), and the plurality of No. 1 buffer assemblies (25) are arranged at equal distances in the longitudinal direction.

2. The shield tunnel anti-floating control structure according to claim 1, characterized in that: A plurality of buffer grooves (231) are provided on the top of the No. 1 connecting plate (23), and two buffer grooves (231) are arranged as a group and distributed on the left and right sides. The anti-floating layer (3) is fixedly connected to the top of the top supporting plate (22).

3. The shield tunnel anti-floating control structure according to claim 1, characterized in that: The first buffer assembly (25) includes a fixed ear (251), the fixed ear (251) is fixedly mounted on the bottom of the second connecting plate (24), the front and rear sides of the bottom of the fixed ear (251) are movably connected to buffer rods (252), the lower parts of the two buffer rods (252) are movably mounted with connecting ears (253), the lower ends of the connecting ears (253) are fixedly mounted with moving blocks (254), and the lower ends of the moving blocks (254) are fixedly connected with buffer blocks (255) adapted to the buffer groove (231).

4. The shield tunnel anti-floating control structure according to claim 3, characterized in that: The buffer block (255) is slidably connected in the buffer groove (231), one end of the buffer block (255) is fixedly connected to a No. 1 spring (256), and one end of the No. 1 spring (256) away from the buffer block (255) is fixedly connected to the inner wall of the buffer groove (231).

5. The shield tunnel anti-floating control structure according to claim 1, characterized in that: The buffer mechanism (4) includes a U-shaped base (41), and an L-shaped mounting frame (42) is fixedly installed on one side of the two U-shaped bases (41) away from the opposite end. A reinforcing rib (43) is fixedly connected inside the L-shaped mounting frame (42). A plurality of slide grooves (44) are provided on both left and right sides of the inner surface of the U-shaped base (41), and a second buffer assembly (45) is slidably installed in two slide grooves (44) located on the same horizontal plane.

6. The shield tunnel anti-floating control structure according to claim 5, characterized in that: The second buffer assembly (45) includes a buffer plate (451), and sliders (452) adapted to the slide groove (44) are integrally formed at both left and right ends of the buffer plate (451). The buffer plate (451) is slidably connected to the U-shaped base (41) through the sliders (452) on both sides. A second spring (453) is fixedly installed at the lower end of the buffer plate (451), and the bottom of the second spring (453) is fixedly connected to the inner wall of the U-shaped base (41).

7. The shield tunnel anti-floating control structure according to claim 1, characterized in that: The bottom of the tunnel body (1) passes through the upper end of the U-shaped base (41) and is fixedly connected to the top of the buffer plate (451); the width of the lower end surface of the tunnel body (1) is smaller than the width of the upper end surface of the buffer plate (451).

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