A ground surface settlement early warning device for a shield tunnel

Abstract

The utility model relates to shield tunnel ground surface settlement technical field especially a kind of ground surface settlement early warning device for shield tunnel, including installation outer box and monitoring box, the monitoring box is located in installation outer box, the monitoring box includes settlement plate and displacement sensor, the settlement plate bottom self installation outer box bottom surface slides and extends downward, positioning cross nail and vertical auxiliary pole are equipped on the installation outer box, the positioning cross nail is co-disposed several, several The positioning cross nail is horizontally arranged and is set in installation outer box top, the positioning cross nail is horizontally slid and penetrates installation outer box, the positioning cross nail one end is in the form of pointed end, and the positioning cross nail other end is positioning end;Positioning nut is equipped on the positioning end, the positioning nut is located in installation outer box outside, the vertical auxiliary pole is co-disposed several, so that the influence of installation outer box by construction environment is reduced, and vertical auxiliary pole is additionally provided, installation outer box is positioned in the assistance from vertical direction.

Description

Technical Field

[0001] This utility model relates to the field of surface settlement technology for shield tunnels, and in particular to a surface settlement early warning device for shield tunnels. Background Technology

[0002] Shield tunneling technology is a key technology in subway construction. With the continuous development of rail transit construction, shield tunneling has quickly gained a foothold in urban rail transit construction due to its speed and safety. However, ground settlement during shield tunneling has become a problem that cannot be ignored. Although there are relevant monitoring methods for ground settlement, these monitoring devices are generally installed directly on the ground. When affected by the construction environment, it is difficult to guarantee the stability of the devices themselves, which may lead to displacement, resulting in inaccurate monitoring results and false warnings. Utility Model Content

[0003] The purpose of this application is to provide a surface subsidence early warning device for shield tunnels, aiming to solve the problems in the prior art.

[0004] This application provides a surface settlement early warning device for shield tunnels, including an outer casing and a monitoring box. The monitoring box is located inside the outer casing and includes a settlement plate and a displacement sensor. The bottom of the settlement plate slides downward from the bottom of the outer casing. The outer casing is provided with positioning horizontal nails and vertical auxiliary rods. Several positioning horizontal nails are arranged horizontally on the top of the outer casing and slide horizontally through it. One end of each positioning horizontal nail is pointed, and the other end is a positioning end. A positioning nut is provided on the positioning end, and the positioning nut is located outside the outer casing. Several vertical auxiliary rods are provided and rotate downward from the bottom of the outer casing to connect with the ground. A worm gear assembly is provided at the top of each vertical auxiliary rod, and a spring compression cylinder is provided at the bottom of each vertical auxiliary rod. A pressure sensor is provided at the bottom of the spring compression cylinder. An early warning component is provided on the outer casing, and both the pressure sensor and the displacement sensor are connected to the early warning component.

[0005] Furthermore, the sensing probe of the displacement sensor is fixedly installed on the top of the settlement plate, and sliding blocks are respectively provided on both sides of the settlement plate, and the sliding blocks are slidably connected to the vertical slide rails on both sides.

[0006] Furthermore, the outer wall of the positioning end is provided with external threads, and the positioning nut is set on the positioning cross pin through the external threads.

[0007] Furthermore, the worm gear assembly includes a rotating worm and a control worm, the vertical auxiliary rod is externally provided with a connecting thread, the vertical auxiliary rod is rotatably disposed at the center of the rotating worm, and the rotating worm and the control worm mesh with each other.

[0008] Furthermore, both the rotating turbine and the control worm are housed within the positioning box, and the end of the control worm extends outward from the positioning box to the outer casing.

[0009] The beneficial effects of this utility model are: by setting the installation box on the tunnel wall, the installation box is less affected by the construction environment. At the same time, a vertical auxiliary rod is added to assist in the vertical positioning of the installation box, and a pressure sensor is set at the bottom of the vertical auxiliary rod to monitor vertical surface settlement, thereby improving the accuracy of monitoring. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the structure of this utility model.

[0012] Figure 3 This is a schematic diagram of the internal structure of the monitoring box.

[0013] In the picture: 1. Install outer casing; 2. Positioning horizontal pin; 21. Pointed shape; 22. Positioning end; 23. Positioning nut; 3. Vertical auxiliary rod; 31. Spring compression cylinder; 32. Control worm gear; 33. Rotating turbine; 34. Positioning box; 35. Pressure sensor; 4. Early warning component; 5. Monitoring box; 51. Settlement plate; 511. Sliding block; 52. Displacement sensor. Detailed Implementation

[0014] 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.

[0015] like Figures 1 to 3The above-described surface settlement early warning device for shield tunnels includes an outer casing 1 and a monitoring box 5. The monitoring box 5 is located inside the outer casing 1 and includes a settlement plate 51 and a displacement sensor 52. The settlement plate 51 extends downward from the bottom of the outer casing 1. The outer casing 1 is provided with positioning horizontal nails 2 and vertical auxiliary rods 3. Several positioning horizontal nails 2 are arranged horizontally on the top of the outer casing 1 and slide horizontally through the outer casing 1. One end of each positioning horizontal nail 2 is pointed 21, and the other end is a positioning end 22. A positioning nut 23 is provided on the positioning end 22 and is located outside the outer casing 1. Several vertical auxiliary rods 3 are provided. Each of the vertical auxiliary rods 3 is inserted downwards from the bottom of the mounting box 1 and connected to the ground. A worm gear assembly is provided at the top of each vertical auxiliary rod 3. A spring compression cylinder 31 is provided at the bottom of each vertical auxiliary rod 3. A pressure sensor 35 is provided at the bottom of the spring compression cylinder 31. A top plate is provided between the pressure sensor 35 and the bottom surface of the vertical auxiliary rod 3. The bottom of the vertical auxiliary rod 3 is rotatably connected to the top plate. The pressure sensor 35 is installed on the bottom surface of the top plate and contacts the ground. An early warning component is provided on the mounting box 1. Both the pressure sensor 35 and the displacement sensor 52 are connected to the early warning component 4. A power module and a control module are provided inside the mounting box 1 to provide electrical signals and power support to the early warning component 4.

[0016] The sensing probe of the displacement sensor 52 is fixedly installed on the top of the settlement plate 51. Sliding blocks 511 are provided on both sides of the settlement plate 51, and the sliding blocks 511 are slidably connected to the vertical slide rails on both sides.

[0017] The outer wall of the positioning end 22 is provided with external threads, and the positioning nut 23 is set on the positioning cross nail 2 through the external threads.

[0018] The worm gear assembly includes a rotating turbine 33 and a control worm 32. The vertical auxiliary rod 3 is externally threaded and is rotatably disposed at the center of the rotating turbine 33. The rotating turbine 33 and the control worm 32 mesh with each other.

[0019] Both the rotating turbine 33 and the control worm 32 are installed inside the positioning box 34. The end of the control worm 32 extends outward from the outer box 1 installed inside the positioning box 34. The rotation of the control worm 32 can cause the vertical auxiliary rod 3 to rotate downward and press down.

[0020] The early warning component 4 includes either a light warning or an audible warning. Since the tunnel surface settlement primarily affects the junction between the tunnel wall and the ground surface, the installation box 1 is placed at this junction. The positioning pins 2 are driven into the tunnel wall from one side, and then the positioning nuts 23 are used to press the installation box 1 against the tunnel wall from the outside. The vertical auxiliary rod 3 is then moved downwards by rotating the control worm gear 32, and the pressure plate is pressed tightly against the pressure sensor 35 until the bottom pressure sensor 35 is in close contact with the ground. The test value of the pressure sensor 35 at this point is set as the initial value. Simultaneously, the installation box 1 is positioned at the junction of the positioning pins 2 and... The vertical auxiliary rod 3 is fixedly installed on the tunnel wall, and the settlement plate 51 extends from the bottom of the installation box 1 to contact the ground. When the ground settles, the settlement plate 51 will slide downward, thereby triggering the warning of the displacement sensor 52. Or when the ground settles, the pressure sensor 353 will drop significantly, which will also trigger the warning. This device reduces the impact of the construction environment on the installation box 1 by setting it on the tunnel wall. At the same time, the vertical auxiliary rod 3 is added to assist in the vertical positioning of the installation box 1. The pressure sensor 35 is set at the bottom of the vertical auxiliary rod 3 to monitor the vertical ground settlement and improve the accuracy of the monitoring.

[0021] The above embodiments are not intended to limit the present invention. Unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. The present invention is not limited to the examples above. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the technical solution of the present invention are also within the protection scope of the present invention. Furthermore, the technical features involved in the different embodiments of the present application described above can be combined with each other as long as they do not conflict with each other.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A surface settlement early warning device for shield tunnels, characterized in that, The system includes an outer casing and a monitoring box, with the monitoring box located inside the outer casing. The monitoring box includes a settlement plate and a displacement sensor. The settlement plate extends downwards from the bottom of the outer casing. The outer casing is equipped with positioning horizontal pins and vertical auxiliary rods. Several positioning horizontal pins are arranged horizontally at the top of the outer casing and slide horizontally through it. One end of each positioning horizontal pin is pointed, and the other end is a positioning end. A positioning nut is located on the positioning end outside the outer casing. Several vertical auxiliary rods are arranged and rotate downwards from the bottom of the outer casing to connect with the ground. A worm gear assembly is located at the top of each vertical auxiliary rod, and a spring compression cylinder is located at the bottom. A pressure sensor is located at the bottom of the spring compression cylinder. An early warning component is located on the outer casing, and both the pressure sensor and the displacement sensor are connected to the early warning component.

2. The surface settlement early warning device for shield tunnels according to claim 1, characterized in that, The sensing probe of the displacement sensor is fixedly installed on the top of the settlement plate, and sliding blocks are provided on both sides of the settlement plate. The sliding blocks are slidably connected to the vertical slide rails on both sides.

3. The surface settlement early warning device for shield tunnels according to claim 1, characterized in that, The outer wall of the positioning end is provided with external threads, and the positioning nut is set on the positioning cross pin through the external threads.

4. The surface settlement early warning device for shield tunnels according to claim 1, characterized in that, The worm gear assembly includes a rotating turbine and a control worm. The vertical auxiliary rod has a connecting thread on its outside and is rotatably disposed at the center of the rotating turbine. The rotating turbine and the control worm mesh with each other.

5. The surface settlement early warning device for shield tunnels according to claim 4, characterized in that, Both the rotating turbine and the control worm are housed inside the positioning box, and the end of the control worm extends outward from the positioning box to the outside of the outer casing.

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