Shield segment floating control device

Abstract

The utility model belongs to the technical field of shield construction, and discloses a shield segment floating control device. The device is used for tunnel construction, the inner wall of a tunnel is supported by a plurality of shield segments, and the device comprises a detection assembly and a grouting mechanism. A detection assembly is arranged between every two adjacent shield segments, each detection assembly comprises a detection rod and a measuring piece arranged on the detection rod, the two ends of each detection rod are rotationally connected with the two adjacent shield segments correspondingly, and the measuring pieces are used for measuring the relative inclination angle between the two adjacent shield segments. The relative inclination angle is an included angle between the detection rod and the axis of the tunnel. And when the relative inclination angle between every two adjacent shield segments reaches a preset inclination angle, the grouting mechanisms can inject slurry between the corresponding shield segments and the inner wall of the tunnel. The shield segment floating control device can prevent the shield segment from floating and ensure the forming quality of a tunnel.

Description

Technical Field

[0001] The utility model relates to the technical field of shield construction, in particular to a shield segment floating control device. Background Art

[0002] During the shield construction process, the shield segments are installed on the inner wall of the tunnel to support the soil after excavation. During the shield process, synchronous grouting operations are required to inject mud between the shield segments and the inner wall of the tunnel, thereby filling the gap between the shield segments and the inner wall of the tunnel, so that the shield segments can stably support the inner wall of the tunnel. Since the slurry of synchronous grouting is fluid, it is easy to cause the shield segments to float, resulting in the misalignment of the segments, which directly affects the forming quality of the tunnel. In addition, in areas with abundant groundwater and high-pressure water, the segments are also affected by buoyancy during the actual construction process. When the buoyancy of the segments is greater than their own gravity, the shield segments will also float. At the same time, installation errors will occur during the installation of the shield segments, which will also cause the segments to float. Utility Model Content

[0003] The utility model aims to provide a shield segment floating control device, which can prevent the shield segment from floating and ensure the forming quality of the tunnel.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] The shield segment floating control device is used for the construction of a tunnel, the inner wall of which is supported by a plurality of shield segments, and comprises:

[0006] A detection component is provided between two adjacent shield segments, and the detection component comprises a detection rod and a measuring piece provided on the detection rod, and both ends of the detection rod are rotatably connected to two adjacent shield segments respectively, and the measuring piece is used to measure the relative inclination angle between two adjacent shield segments, and the relative inclination angle is the angle between the detection rod and the axis of the tunnel;

[0007] The grouting mechanism can inject slurry between the corresponding shield segment and the inner wall of the tunnel when the relative inclination angle between two adjacent shield segments reaches a preset inclination angle.

[0008] Preferably, the preset inclination angle is α, and the relative inclination angle between the first-level shield segments and the second-level shield segments is β, and α≥β.

[0009] Preferably, a controller is further included, and the measuring member and the grouting mechanism are both electrically connected to the controller.

[0010] Preferably, connecting rods are provided at both ends of the detection rod in the vertical direction, one end of the connecting rod is rotatably connected to the detection rod, and the other end is fixedly connected to the shield segment.

[0011] Preferably, one end of the connecting rod away from the detection rod is bonded to the inner wall of the shield segment by means of a film.

[0012] Preferably, the shield segment is annular and comprises a plurality of arched segment units. The plurality of segment units are assembled to form the shield segment. Each segment unit is provided with a grouting hole. The grouting mechanism can inject slurry between the shield segment and the inner wall of the tunnel through the grouting hole.

[0013] Preferably, a plurality of the detection components are arranged at intervals along the circumferential direction between two adjacent shield segments, the plurality of the detection components are arranged in one-to-one correspondence with the plurality of the segment units, and the two ends of the detection rod are respectively rotatably connected to two adjacent segment units.

[0014] Preferably, a grouting bag is further included, which is arranged in a one-to-one correspondence with the pipe segment unit. The grouting bag is arranged on the outer wall of the pipe segment unit and is connected with the grouting hole. Mud can be injected into the grouting bag through the grouting hole.

[0015] Preferably, the grouting mechanism comprises a storage tank and a driving member, wherein mud is stored in the storage tank, an input end of the driving member is connected to the storage tank, and an output end of the driving member is connected to the grouting hole, and the driving member can transport the mud to the grouting hole.

[0016] Preferably, the measuring element is an inclinometer.

[0017] Beneficial effects of the utility model:

[0018] The utility model provides a shield segment floating control device, wherein adjacent shield segments are rotatably connected with a detection rod. When any shield segment floats, there will be misalignment between the two adjacent shield segments, and the detection rod connected thereto will be driven to rotate, so that an angle is generated between the detection rod and the axis of the tunnel. This angle is the relative inclination angle between the two adjacent shield segments. The larger the relative inclination angle, the greater the misalignment. Therefore, by measuring the angle between the two adjacent shield segments, it can be determined whether the floating amount of the shield segment is within the allowable range. The measuring part can detect the relative inclination angle between the two adjacent shield segments in real time. When the relative inclination angle reaches the preset inclination angle, the grouting mechanism can inject mud between the corresponding shield segment and the inner wall of the tunnel, thereby accurately suppressing the floating of the shield segment and ensuring the forming quality of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the shield segment floating control device provided by the utility model;

[0020] Figure 2 It is a schematic diagram of the connection structure of adjacent shield segments.

[0021] In the figure:

[0022] 1. Shield segment; 2. Detection rod; 21. Connecting rod; 3. Grouting mechanism; 31. Storage tank; 32. Driving part; 33. Mud powder tank; 34. Mixing tank; 35. Water pipe; 4. Controller; 5. Filling layer; 100. Tunnel. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0024] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0027] See also Figure 1 and Figure 2 This embodiment provides a shield segment floating control device, which is used in the construction of the tunnel 100, and can prevent the shield segment 1 from floating, so as to ensure the forming quality of the tunnel 100. First, the construction process of the tunnel 100 is briefly introduced: the shield machine moves along the excavation direction, and the soil is excavated by the cutter head. During the construction process, the shield segment 1 needs to be installed in the tunnel 100 after the excavation is completed to support the inner wall of the tunnel 100. In order to support the tunnel 100 and ensure the stability of the installation of the shield segment 1, it is necessary to perform a synchronous grouting operation, that is, (one-time grouting), and inject mud between the shield segment 1 and the inner wall of the tunnel 100 to form a filling layer 5 between the shield segment 1 and the inner wall of the tunnel 100, so as to fill the gap between the shield segment 1 and the inner wall of the tunnel 100. When the mud solidifies, the shield segment 1 can be embedded in the inner wall of the tunnel, so as to stably support the tunnel. During the tunnel construction process, the shield segment 1 is prone to floating.

[0028] Based on this, the shield segment floating control device provided in this embodiment includes a detection component and a grouting mechanism 3. A detection component is provided between two adjacent shield segments 1, and the detection component includes a detection rod 2 and a measuring piece provided on the detection rod 2. The two ends of the detection rod 2 are respectively rotatably connected to the two adjacent shield segments 1. The measuring piece is used to measure the relative inclination angle between the two adjacent shield segments 1. The relative inclination angle is the angle between the detection rod 2 and the axis of the tunnel 100. When the relative inclination angle between two adjacent shield segments 1 reaches the preset inclination angle, the grouting mechanism 3 can inject slurry between the corresponding shield segment 1 and the inner wall of the tunnel 100.

[0029] In the shield segment floating control device provided in this embodiment, adjacent shield segments 1 are rotatably connected with detection rods 2. When any shield segment 1 floats, two adjacent shield segments 1 will be misaligned, and the detection rods 2 connected thereto will be driven to rotate, so that an angle ( Figure 2α), this angle is the relative inclination angle between two adjacent shield segments 1. The larger the relative inclination angle, the greater the misalignment. Therefore, by measuring the angle between two adjacent shield segments 1, it is possible to determine whether the floating amount of the shield segment 1 is within the allowable range. The measuring part can detect the relative inclination angle between two adjacent shield segments 1 in real time. When the relative inclination angle reaches the preset inclination angle, the grouting mechanism 3 can perform secondary grouting between the corresponding shield segment 1 and the inner wall of the tunnel 100, thereby accurately suppressing the floating of the shield segment 1, ensuring the molding quality of the tunnel 100, and ensuring the stability of the tunnel 100. It can be understood that both the primary grouting and the secondary grouting are achieved by the grouting mechanism 3.

[0030] The preset tilt angle is defined as α, and the relative tilt angle between the first-stage shield segment 1 and the second-stage shield segment 1 is defined as β, α≥β. The first-stage shield segment 1 is the first installed shield segment 1, which is first embedded in the inner wall of the tunnel 100. Therefore, the relative tilt angle between the first-stage shield segment 1 and the second-stage shield segment 1 is used as the critical value of the preset tilt angle to ensure the accuracy of control.

[0031] Optionally, a controller 4 is also included, and the measuring piece and the grouting mechanism 3 are both electrically connected to the controller 4. During the shield construction process, the measuring piece measures the relative inclination angle between adjacent shield segments 1 in real time and feeds the data back to the controller 4. The controller 4 determines whether the relative inclination angle between adjacent shield segments 1 reaches the preset inclination angle based on these data. When it is detected that the relative inclination angle between adjacent shield segments 1 reaches the preset inclination angle, the controller 4 sends a control signal to the grouting mechanism 3 to drive the grouting mechanism 3 to inject mud between the corresponding shield segment 1 and the inner wall of the tunnel 100, thereby controlling the floating of the corresponding shield segment 1. In this embodiment, the controller 4 uses an STM32 controller.

[0032] Furthermore, connecting rods 21 are provided at both ends of the detection rod 2 in the vertical direction, one end of the connecting rod 21 is rotatably connected to the detection rod 2, and the other end is fixedly connected to the shield segment 1. The provision of the connecting rod 21 can ensure the stability of the connection between the detection rod 2 and the shield segment 1, and prevent the detection rod 2 from being separated from the shield segment 1. Specifically, a rotating shaft is provided at one end of the connecting rod 21, and a connecting hole is provided at the end of the detection rod 2. The rotating shaft is inserted into the connecting hole and rotatably cooperates with the connecting hole, thereby realizing the rotational connection between the connecting rod 21 and the detection rod 2. In this embodiment, one end of the connecting rod 21 away from the measuring piece is bonded to the inner wall of the shield segment 1 by a film. The bonding method is easy to install, and can improve the construction efficiency while ensuring the connection strength between the connecting rod 21 and the shield segment 1.

[0033] Optionally, the shield segment 1 is annular, and includes a plurality of arched segment units, and the plurality of segment units are assembled to form the shield segment 1, and each segment unit is provided with a grouting hole, and the grouting mechanism 3 can inject slurry between the shield segment 1 and the inner wall of the tunnel 100 through the grouting hole. The annular shield segment 1 can stably support the inner wall of the tunnel 100, and the shield segment 1 is split into a plurality of arched segment units for easy processing.

[0034] Furthermore, a plurality of detection components are arranged at intervals along the circumferential direction between two adjacent shield segments 1, and the plurality of detection components are arranged one-to-one with the plurality of segment units, and the two ends of the detection rod 2 are respectively connected to the two adjacent segment units for rotation. In this arrangement, the relative inclination angle between the two adjacent segment units is detected by the measurement components between the adjacent segment units, and when the relative inclination angle between the adjacent segment units reaches the preset inclination angle, the grouting mechanism 3 is used to inject grout into the grouting holes on the corresponding segment units.

[0035] When slurry is injected between the shield segment 1 and the inner wall of the tunnel 100 through the grouting hole, the slurry is fluid and easy to flow, thereby affecting the effect of suppressing the floating of the shield segment 1. Based on this, the shield segment floating control device also includes a grouting bag, which is arranged one-to-one with the segment unit. The grouting bag is arranged on the outer wall of the segment unit and is connected to the grouting hole. The slurry can be injected into the grouting bag through the grouting hole. The grouting can tightly wrap the slurry to prevent the slurry from flowing, thereby accurately controlling the floating of the shield segment 1.

[0036] Optionally, the measuring device is an inclinometer, so as to accurately measure the relative inclination angle between two adjacent shield segments 1 .

[0037] Optionally, the grouting mechanism 3 includes a storage tank 31 and a driving member 32. The storage tank 31 stores mud. The input end of the driving member 32 is connected to the storage tank 31, and the output end of the driving member 32 is connected to the grouting hole. The driving member 32 can transport the mud to the grouting hole. The driving member 32 is electrically connected to the controller 4. When the relative inclination angle of two adjacent shield segments 1 gradually reaches a preset inclination angle, the controller 4 sends a control signal to the driving member 32 to start the driving member 32, so that the mud in the storage tank 31 passes through the grouting hole of the corresponding shield segment 1. Optionally, the driving member 32 is a mud pump.

[0038] Specifically, the grouting mechanism 3 further includes a mud powder tank 33 and a mixing tank 34 which are connected to each other. Cement powder is stored in the mud powder tank 33. When making mud, the cement powder is first transported to the mixing tank 34, and clean water is transported to the mixing tank 34 through an external water pipe 35. Then, mud is formed after being stirred by a stirring paddle in the mixing tank 34. The mixing tank 34 is connected to the storage tank 31 to transport the stirred mud to the storage tank 31 for storage.

[0039] Furthermore, the output end of the driving member 32 is connected to a first connecting pipeline, and the input end of the driving member 32 is connected to a second connecting pipeline. The first connecting pipeline can be connected to the grouting hole on the shield segment 1, and the second connecting pipeline is connected to the storage tank 31.

[0040] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A shield segment floating control device, used for the construction of a tunnel (100), wherein the inner wall of the tunnel (100) is supported by a plurality of shield segments (1), characterized in that: include: A detection component, wherein the detection component is disposed between two adjacent shield segments (1), the detection component comprising a detection rod (2) and a measuring piece disposed on the detection rod (2), the two ends of the detection rod (2) being rotatably connected to the two adjacent shield segments (1), and the measuring piece being used to measure a relative inclination angle between the two adjacent shield segments (1), the relative inclination angle being the angle between the detection rod (2) and the axis of the tunnel (100); The grouting mechanism (3) is capable of injecting slurry between the corresponding shield segment (1) and the inner wall of the tunnel (100) when the relative inclination angle between two adjacent shield segments (1) reaches a preset inclination angle.

2. The shield segment floating control device according to claim 1 is characterized in that: The preset inclination angle is α, and the relative inclination angle between the first-level shield segment (1) and the second-level shield segment (1) is β, where α≥β.

3. The shield segment floating control device according to claim 1 is characterized in that: It also comprises a controller (4), and the measuring element and the grouting mechanism (3) are both electrically connected to the controller (4).

4. The shield segment floating control device according to claim 1 is characterized in that: Both ends of the detection rod (2) are provided with connecting rods (21) in the vertical direction; one end of the connecting rod (21) is rotatably connected to the detection rod (2), and the other end is fixedly connected to the shield segment (1).

5. The shield segment floating control device according to claim 4 is characterized in that: One end of the connecting rod (21) away from the detection rod (2) is bonded to the inner wall of the shield segment (1) via a film.

6. The shield segment floating control device according to any one of claims 1 to 5, characterized in that: The shield segment (1) is annular and comprises a plurality of arched segment units. The plurality of segment units are assembled to form the shield segment (1). Each segment unit is provided with a grouting hole. The grouting mechanism (3) can inject slurry between the shield segment (1) and the inner wall of the tunnel (100) through the grouting hole.

7. The shield segment floating control device according to claim 6 is characterized in that: A plurality of the detection components are arranged at intervals along the circumferential direction between two adjacent shield segments (1), and the plurality of the detection components are arranged in one-to-one correspondence with the plurality of segment units. Both ends of the detection rod (2) are rotatably connected to the two adjacent segment units respectively.

8. The shield segment floating control device according to claim 7 is characterized in that: It also includes a grouting bag, which is arranged in a one-to-one correspondence with the pipe segment unit. The grouting bag is arranged on the outer wall of the pipe segment unit and is connected with the grouting hole. Mud can be injected into the grouting bag through the grouting hole.

9. The shield segment floating control device according to claim 6, characterized in that: The grouting mechanism (3) comprises a storage tank (31) and a driving member (32), wherein mud is stored in the storage tank (31), an input end of the driving member (32) is connected to the storage tank (31), and an output end of the driving member (32) is connected to the grouting hole, and the driving member (32) can transport the mud into the grouting hole.

10. The shield segment floating control device according to any one of claims 1 to 5, characterized in that: The measuring component is an inclinometer.

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