Single-point settlement monitoring device with adjustable bearing screw

Abstract

The utility model discloses a single point subsidence monitoring device with adjustable bearing screw rod. Be used for accurate measurement stratum subsidence. The device is anchored in the deep stable stratum as fixed reference through bottom anchor head, and the extension rod and surveying staff connected on it will reference to monitoring point. The core of the device is adjustable bearing screw rod module, which contains a universal joint structure composed of bidirectional adjusting screw rod and ball hinge connecting seat, and the top is connected with the settlement plate placed in unstable soil layer. When the soil layer subsides, the subsidence of the settlement plate is converted into pure vertical displacement through the universal joint, driving the bidirectional adjusting screw rod to move, and then the electric measuring displacement sensor connected between the screw rod and the reference surveying staff accurately captures. The design effectively eliminates the horizontal force interference caused by the inclination of the settlement plate through the universal joint, and ensures the initial centering and accuracy through the adjustable screw rod, realizing the high reliability, high precision and automatic subsidence monitoring.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical engineering monitoring technology, and in particular to a single-point settlement monitoring device with an adjustable support screw. Background Technology

[0002] In existing technologies, track settlement monitoring still largely relies on traditional instruments such as levels and total stations. While these methods and equipment are mature, they are labor-intensive, slow, and significantly disrupt construction or track operation. This is especially true in enclosed underground spaces like tunnels, where insufficient lighting makes it difficult to guarantee testing accuracy. Traditional settlement monitoring devices also suffer from structural compatibility issues, such as: ① uneven mounting surfaces leading to initial sensor angular errors; ② dynamic changes in the measurement reference surface caused by differential settlement during construction. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a single-point settlement monitoring device with an adjustable support screw. By cooperating with the settlement plate and the bidirectional adjustment screw, the height and level of the settlement plate can be precisely adjusted, thus solving the structural compatibility defects of traditional settlement monitoring devices in the background art.

[0004] To achieve the above objectives, this utility model provides a single-point settlement monitoring device with an adjustable support screw, comprising: a bottom anchor head, at least one extendable extension rod, a measuring rod, and an adjustable support screw module; The bottom anchor head is anchored in a stable stratum and connected to an extension rod at its upper end; the upper end of the extension rod is connected to a measuring rod, and the upper end of the measuring rod is connected to an adjustable support screw module; more preferably, when there are multiple extension rods, adjacent extension rods are connected by a straight joint, and the connection between the straight joint and the extension rod is provided with a sealing ring to prevent water and soil intrusion.

[0005] The adjustable support screw module includes a ball joint connector, a bidirectional adjusting screw, a settling plate, an electrical displacement sensor, and a metal flexible hose. The bidirectional adjusting screw includes an upper end, a middle end, and a lower end. The tail end of the upper end and the head end of the lower end are each provided with a ball head. The settling plate has a guide hole at its center, through which the middle part of the bidirectional adjusting screw passes. The ball joint connector is embedded in the guide hole, and the ball heads of the upper and lower ends of the bidirectional adjusting screw are movably connected to the ball joint connector, forming a universal joint structure. This allows relative deflection between the settling plate and the adjusting screw. The electrical displacement sensor is connected to the lower end of the bidirectional adjusting screw via a universal joint. The flexible metal tube is sleeved on the outside of the electrical displacement sensor, and the sensor signal line is led out from the flexible metal tube. The upper end of the measuring rod is connected to the lower part of the flexible metal tube.

[0006] More preferably, the electrical displacement sensor is an inductively modulated frequency displacement meter.

[0007] In a further preferred embodiment, the electrical displacement sensor remotely synchronizes the monitoring data to the monitoring center via a wireless transmission module.

[0008] In a further preferred embodiment, the connection between the measuring rod and the extension rod is further provided with a reinforcing anchor head, and the sidewall of the reinforcing anchor head is symmetrically welded with at least two reinforcing vertical plates to improve its structural rigidity and stability.

[0009] More preferably, the upper and lower ends of the bidirectional adjusting screw are also connected to an anti-loosening component. The anti-loosening component adopts a double-nut structure, including a double nut and an anti-loosening washer assembled with the double nut. The anti-loosening washer is disposed between the contact gap between the double nut structure and the ball joint connector.

[0010] More preferably, the double nuts include a main nut and a secondary nut; the main nut is sleeved on the upper end tail end for locking the upper end to the ball joint connector, and the secondary nut is sleeved on the lower end head end for locking the lower end to the ball joint connector.

[0011] The utility model provides a single-point settlement monitoring device with an adjustable support screw. It uses a settlement plate and a bidirectional adjusting screw for precise matching. The axial screw enables ±15mm height compensation adjustment, and the universal joint structure completes 0-5° tilt angle correction. A double-nut locking anti-reverse structure ensures mechanical stability during long-term monitoring. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the single-point settlement monitoring device with adjustable support screw provided by this utility model.

[0013] Figure 2 This is a schematic diagram of the connection between the bidirectional adjusting screw and the settling plate provided by this utility model.

[0014] Figure 3 A three-dimensional structural diagram of the single-point settlement monitoring device with adjustable support screw provided by this utility model.

[0015] In the diagram: 1. Settlement plate; 2. Bidirectional adjusting screw; 3. Electrical displacement sensor; 4. Measuring rod; 401. Metal flexible hose; 5. Reinforcing anchor head; 6. Extension rod; 7. Straight connector; 8. Bottom anchor head; 9. Cement grout; 10. Backfill soil; 201. Ball joint connector; 202. Guide hole; 203. Anti-loosening component; 204. Ball head. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1As shown, one embodiment of this utility model provides a single-point settlement monitoring device with an adjustable support screw, comprising: a bottom anchor head 8, at least one extendable extension rod 6, a measuring rod 4, and an adjustable support screw module; The bottom anchor head 8 is anchored in the stable stratum and connected to the upper end of the extension rod 6; the upper end of the extension rod 6 is connected to the measuring rod 4, and the upper end of the side rod is connected to the adjustable support screw module; more preferably, when there are multiple extension rods 6, the adjacent extension rods 6 are connected by a straight connector 7, and the connection between the straight connector 7 and the extension rod 6 is provided with a sealing ring to prevent water and soil intrusion.

[0018] In a further preferred embodiment, a reinforcing anchor head is provided at the connection between the measuring rod 4 and the extension rod 6. At least two reinforcing vertical plates are symmetrically welded to the sidewall of the reinforcing anchor head to enhance its structural rigidity and stability. The design of the reinforcing anchor head enhances the rigidity of the connection at the top of the measuring rod, ensuring that force transmission is not affected by structural deformation.

[0019] like Figure 2 , Figure 3 The adjustable support screw module includes a ball joint connector 201, a bidirectional adjusting screw 2, a settling plate 1, an electrical displacement sensor 3, and a metal hose 401. The bidirectional adjusting screw 2 includes an upper end, a middle end, and a lower end. The tail end of the upper end and the head end of the lower end are respectively provided with ball heads 204. The settling plate 1 has a guide hole 202 at its center. The middle part of the bidirectional adjusting screw 2 passes through the guide hole 202. The ball joint connector 201 is embedded in the guide hole 202. The ball heads of the upper end and the lower end of the bidirectional adjusting screw 2 are movably connected to the ball joint connector 201, forming a universal joint structure. This allows relative deflection between the settling plate 1 and the adjusting screw. The electrical displacement sensor 3 is connected to the lower end of the bidirectional adjusting screw 2 or the measuring rod via a universal joint. The metal flexible tube 401 is sleeved on the outside of the electrical displacement sensor 3, and the sensor signal line is led out from the metal flexible tube 401. The upper end of the measuring rod 4 is connected to the lower part of the metal flexible tube 401.

[0020] Preferably, the electrical displacement sensor 3 is an inductively frequency-modulated displacement meter. The electrical displacement sensor 3 connects to a wireless transmission module to remotely synchronize monitoring data to a monitoring center. The inductively frequency-modulated displacement meter utilizes the principle of electromagnetic induction. A magnetic piston rod, fixed to the measuring rod, is inserted into a solenoid coil and can move back and forth. The inductance of the coil is related to the length of the magnetic piston rod inserted into the coil. When displacement occurs, it causes a change in the coil inductance. The inductively frequency-modulated circuit converts this change in inductance into a frequency signal, which can then be displayed by a reading instrument.

[0021] More preferably, the upper and lower ends of the bidirectional adjusting screw 2 are also connected to an anti-loosening component 203. The anti-loosening component 203 adopts a double nut structure, including a double nut and an anti-loosening washer assembled with the double nut. The anti-loosening washer is disposed between the contact gap between the double nut structure and the ball joint connecting seat 201.

[0022] More preferably, the double nuts include a main nut and a secondary nut; the main nut is sleeved on the upper end tail end for locking the upper end to the ball joint connector 201, and the secondary nut is sleeved on the lower end head end for locking the lower end to the ball joint connector 201.

[0023] Initial state: After installation, adjust the bidirectional adjusting screw 2 to adjust the angle of the universal joint formed by the upper and lower ends of the settlement plate 1 and the bidirectional adjusting screw 2, and then tighten it with the anti-loosening component; make the settlement plate 1 in close contact with the soil layer, and put the electrical displacement sensor 3 within a suitable prediction range, and record the initial reading.

[0024] When settlement occurs, specifically when the unstable soil layer subsides, settlement plate 1 descends accordingly. The subsidence of settlement plate 1 causes the ball joint connector 201 at its center to move the bidirectional adjusting screw 2 downwards, generating relative displacement: the lower end of the bidirectional adjusting screw 2 (connected to the sensor rod) moves downwards. This displacement (ΔL) is directly equal to the settlement of the unstable soil layer relative to the stable stratum. The inductively modulated frequency displacement gauge converts the displacement into an electrical signal (usually a frequency signal with strong anti-interference capability), which is led out through a metal flexible tube via a signal line and can be transmitted to the monitoring center via a wireless transmission module.

[0025] In this application, when installing the bidirectional adjusting screw and settlement plate, the soil surface may be uneven, or the measuring rod may not be perfectly vertical. By rotating the bidirectional adjusting screw, the height and level of the settlement plate can be precisely adjusted to ensure full contact with the soil layer, while simultaneously placing the displacement sensor within its optimal operating range. Due to the universal joint effect of the ball joint connector, relative deflection between the settlement plate and the adjusting screw is allowed. When the settlement plate tilts, it can adaptively deflect via the ball joint, transmitting only the vertical downward displacement to the adjusting screw and sensor, effectively filtering out the influence of lateral forces and bending moments, ensuring the accuracy of the measurement data and the long-term durability of the device.

[0026] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A single-point settlement monitoring device with an adjustable supporting screw, characterized in that, The device, from bottom to top, includes: a bottom anchor head (8), at least one extendable extension rod (6), a measuring rod (4), and an adjustable support screw module; The bottom anchor head (8) is anchored in a stable stratum, and its upper end is connected to an extension rod (6); the upper end of the extension rod (6) is connected to a measuring rod (4), and the upper end of the measuring rod (4) is connected to an adjustable support screw module; The adjustable support screw module includes a ball joint connector (201), a bidirectional adjusting screw (2), a settling plate (1), an electrical displacement sensor (3), and a metal hose (401); the bidirectional adjusting screw includes an upper end, a middle part, and a lower end; the tail end of the upper end and the head end of the lower end are respectively provided with ball heads; the settling plate has a guide hole (202) in the center, the middle part of the bidirectional adjusting screw passes through the guide hole (202), the ball joint connector (201) is embedded in the guide hole, and the ball heads (204) of the upper end and the lower end of the bidirectional adjusting screw are movably connected to the ball joint connector (201); thus forming a universal joint structure; allowing relative deflection between the settling plate (1) and the bidirectional adjusting screw (2); The electrical displacement sensor (3) is connected to the lower end of the bidirectional adjusting screw (2) via a universal joint. The metal flexible tube (401) is sleeved on the outside of the electrical displacement sensor (3), and the sensor signal line is led out through the metal flexible tube. The upper end of the measuring rod (4) is connected to the lower part of the metal flexible tube.

2. The single-point settlement monitoring device with adjustable support screw according to claim 1, characterized in that, When there are multiple extension rods (6), a straight connector (7) is connected between adjacent extension rods. A sealing ring is provided at the connection between the straight connector (7) and the extension rod (6) to prevent water and soil intrusion.

3. The single-point settlement monitoring device according to claim 1, characterized in that, The connection between the measuring rod (4) and the extension rod (6) is also provided with a reinforcing anchor head (5). The side wall of the reinforcing anchor head is symmetrically welded with at least two reinforcing vertical plates to improve its structural rigidity and stability.

4. The single-point settlement monitoring device according to claim 1, characterized in that, The electrical displacement sensor (3) is an inductive frequency-modulated displacement meter.

5. The single-point settlement monitoring device according to claim 1 or 4, characterized in that, The electrical displacement sensor (3) remotely synchronizes the monitoring data to the monitoring center by connecting to the wireless transmission module.

6. The single-point settlement monitoring device according to claim 1, characterized in that, The upper and lower ends of the bidirectional adjusting screw (2) are also connected to an anti-loosening component. The anti-loosening component adopts a double nut structure, including a double nut and an anti-loosening washer assembled with the double nut. The anti-loosening washer is set between the contact gap between the double nut structure and the ball joint connecting seat.

7. The single-point settlement monitoring device according to claim 6, characterized in that, The double nut includes a main nut and a secondary nut; the main nut is sleeved on the upper end tail end for locking the upper end to the ball joint connector, and the secondary nut is sleeved on the lower end head end for locking the lower end to the ball joint connector.

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