Shield construction across the sea area Monitoring device for grout seepage on the sea surface
The grout seepage monitoring device with a mobile hull and automated positioning system addresses the accuracy issues of conventional devices by stabilizing the turbidity sensor's position and adapting to water flow, ensuring precise and timely monitoring of grout outflow during shield tunneling across sea areas.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2026-01-07
- Publication Date
- 2026-03-06
AI Technical Summary
Conventional grout seepage monitoring devices for shield tunneling across sea areas suffer from reduced accuracy due to the turbidity sensor's dependence on the position of the upper hull, which is offset by waves and currents, leading to shifts in monitoring range and reduced accuracy.
A grout seepage monitoring device with a mobile hull and a monitoring mechanism that includes a liquid level sensor, water quality sensor, turbidity sensor, and a positioning system comprising motors, guide screws, square nuts, adjustment plates, and counterweight mechanisms to automatically adjust the turbidity sensor's position and stability on the seabed.
Ensures accurate and timely monitoring of grout outflow by maintaining the turbidity sensor's position, preventing deviations, and enhancing its stability under varying water flow conditions, thereby ensuring the safety and efficiency of shield construction.
Smart Images
Figure 0003255004000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to the technical field of monitoring devices, and more particularly to a monitoring device for grout seepage on the sea surface during shield construction across a sea area. [Background technology]
[0002] When constructing a shield tunnel across an offshore area, in order to discharge wastewater away from the sea, it is generally necessary to excavate a shaft before opening the tunnel, and the tunnel is often located on the seabed. During this process, if the shield machine's excavation speed is too fast, the earth pressure is set unreasonably, the synchronous grout injection pressure is too high, or the ground conditions change suddenly, it is likely to cause subsea grout seepage, which will cause ground subsidence, affect the surrounding marine ecological environment, and may even threaten the safety of the shield construction.
[0003] Conventional grout seepage monitoring devices for shield tunneling across the sea area use a turbidity sensor to monitor the bottom of the water, and also use an upper liquid level sensor and a water quality sensor to provide supplementary judgment. The turbidity sensor moves on the sea surface, following the speed of the shield tunneling at the bottom of the seawater. However, the turbidity sensor is too dependent on the position of the upper hull on the sea surface. If the hull is offset or swayed on the sea surface due to factors such as waves and currents, the position of the turbidity sensor will be offset, and the monitoring range of the turbidity sensor will easily shift, reducing the accuracy of monitoring the grout seepage situation. Summary of the Invention [Means for solving the problem]
[0004] The present invention provides the following technical solution: A grout seepage monitoring device for a sea surface in a shield construction crossing a sea area portion includes a mobile hull, a monitoring mechanism installed on the surface of the mobile hull, the monitoring mechanism including a liquid level sensor, the liquid level sensor fixedly connected to the bottom of the mobile hull, a water quality component sensor installed on the side of the mobile hull, a guide bracket fixedly connected to the surface of the mobile hull, a first motor fixedly connected to the surface of the guide bracket, and a guide screw fixed on the output shaft of the first motor. a square nut connected to the surface of the guide screw by a screw thread; an adjusting plate rotatably connected to the surface of the square nut; a second motor fixedly connected to the surface of the adjusting plate; a winding disc fixedly connected to the output shaft of the second motor; a traction rope wound and connected to the surface of the winding disc; a turbidity sensor installed at the end of the traction rope; an electric push rod rotatably connected to the surface of the square nut; and a piston rod of the electric push rod rotatably connected to the bottom of the second motor.
[0005] Preferably, a counterweight mechanism is installed at the end of the towing rope, the counterweight mechanism including a mounting plate, the mounting plate being fixedly connected to the end of the towing rope, the turbidity sensor being fixedly connected to the bottom of the towing rope, a stud being fixedly connected to a surface of the mounting plate, a counterweight disk being connected to the surface of the stud through a hole, and a clamping nut being connected to the surface of the stud by a screw thread.
[0006] Preferably, the first motor drives a guide screw to rotate by a piston rod, the guide screw drives a square nut to slide on the surface of the moving hull by rotation, and the square nut moves an adjustment plate to slide synchronously.
[0007] Preferably, a rotating shaft is installed on the surface of the square nut, the adjusting plate rotates on the square nut by the rotating shaft, the electric push rod pushes the adjusting plate to rotate on the square nut by the piston rod, and the electric push rod itself also rotates correspondingly.
[0008] Preferably, the second motor drives the winding disk to rotate by an output shaft, the winding disk winding the traction rope onto the winding disk by rotating counterclockwise, and the traction rope releasing the traction rope by rotating clockwise.
[0009] Preferably, two sets of studs are provided, circular holes are drilled on the surface of the clamping nut, and the studs are connected by passing through the holes on the surface of the studs.
[0010] Preferably, the counterweight discs are installed in multiple sets, and the multiple sets of mounting plates are stacked on the surface of the mounting plate, and the tightening nuts, in combination with the studs, restrict the multiple sets of counterweight discs on the surface of the mounting plate. [Effects of the Invention]
[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0012] This monitoring device is equipped with a monitoring mechanism on the mobile hull, which includes a liquid level sensor, a water quality component sensor, and a turbidity sensor. It is also equipped with a positioning system consisting of a first motor, a guide screw, a square nut, an adjustment plate, a second motor, a winding disc, a towing rope, and an electric push rod. This allows the position of the turbidity sensor to be automatically adjusted after the position of the mobile hull is offset, accurately positioning the monitoring area and avoiding deviation of the monitoring range. This ensures the accuracy and timeliness of monitoring the grout outflow situation, allows potential dangers of grout outflow to be detected in a timely manner, and guarantees the safety of shield construction.
[0013] This monitoring device is equipped with a counterweight mechanism consisting of a mounting plate, studs, counterweight discs and tightening nuts, which allows the counterweight of the turbidity sensor to be flexibly adjusted according to the water flow conditions in the construction area. The counterweight can be increased in areas with fast water flow to ensure the stability of the sensor, and decreased in areas with slow water flow to prevent the sensor's flexibility from being affected, ensuring the turbidity sensor's stable position on the seabed and preventing the sensor from shaking or being swept away by the water flow, improving the monitoring adaptability of the monitoring mechanism and ensuring smooth monitoring operation. [Brief explanation of the drawings]
[0014] [Figure 1] 1 is a front view of the overall structure of the present invention; [Figure 2] FIG. 2 is a front partial schematic view of the structure of the present invention; [Figure 3] 1 is a schematic front cross-sectional perspective view of a guide bracket structure according to the present invention; [Figure 4] FIG. 2 is a schematic perspective view of the structure of the present invention from the side and bottom. [Figure 5] 1 is a front cross-sectional perspective schematic view of the end of a towing rope according to the present invention; DETAILED DESCRIPTION OF THE INVENTION
[0015] 1 to 5, one embodiment of the present invention is shown.
[0016] The grout well-up monitoring device for the sea surface of a shield construction crossing a sea area portion includes a mobile hull 1, a propulsion system installed on the mobile hull 1, a monitoring mechanism installed on the surface of the mobile hull 1, the monitoring mechanism including a liquid level sensor 11, the liquid level sensor 11 fixedly connected to the bottom of the mobile hull 1, a water quality component sensor 12 installed on the side of the mobile hull 1, a guide bracket 2 fixedly connected to the surface of the mobile hull 1, the guide bracket 2 fixedly connected to the surface of the mobile hull 1, a first motor 21 fixedly connected to the surface of the guide bracket 2, a guide screw 22 fixedly connected to the output shaft of the first motor 21, a square nut 23 connected to the surface of the guide screw 22 by a screw thread, and an adjustment plate 24 rotatably mounted on the surface of the square nut 23. The movable body 1 is connected to the shield machine via a motor, a second motor 25 is fixedly connected to the surface of the adjustment plate 24, a winding disc 26 is fixedly connected to the output shaft of the second motor 25, a towing rope 27 is wound around and connected to the surface of the winding disc 26, a turbidity sensor 28 is installed at the end of the towing rope 27, an electric push rod 29 is rotatably connected to the surface of the square nut 23, and the piston rod of the electric push rod 29 is rotatably connected to the bottom of the second motor 25. Here, the movement position of the movable body 1 is determined by the excavation position and direction of the shield machine, in conjunction with the geological exploration data and the construction plan, and the position of the turbidity sensor 28 of the monitoring mechanism needs to be appropriately moved according to the construction progress and route, and the monitoring mechanism is equipped with an automated control system.
[0017] Furthermore, a counterweight mechanism is installed at the end of the towing rope 27, the counterweight mechanism includes a mounting plate 3, the mounting plate 3 is fixedly connected to the end of the towing rope 27, a turbidity sensor 28 is fixedly connected to the bottom of the towing rope 27, a stud 31 is fixedly connected to the surface of the mounting plate 3, a counterweight disk 32 is connected to the surface of the stud 31 through a hole, and a tightening nut 33 is connected to the surface of the stud 31 by a screw thread.
[0018] Furthermore, the first motor 21 drives the guide screw 22 to rotate via the piston rod, the guide screw 22 drives the square nut 23 to slide on the surface of the movable hull 1 by rotation, the square nut 23 moves the adjustment plate 24 to slide synchronously, the adjustment plate 24 moves the winding disc 26 and the towing rope 27 to move synchronously, and further moves the turbidity sensor 28 to move on the seabed, changing the lateral position of the turbidity sensor 28, so that the position of the turbidity sensor 28 matches the position of the shield channel.
[0019] Furthermore, a rotating shaft is installed on the surface of the square nut 23, and the adjusting plate 24 rotates on the square nut 23 via the rotating shaft. The electric push rod 29 pushes the second motor 25 to rotate on the square nut 23 via the piston rod, and the electric push rod 29 itself also rotates correspondingly. In the rotation process, the adjusting plate 24 moves the winding disc 26 and the towing rope 27 to rotate, which further changes the vertical position of the turbidity sensor 28 and realizes the adjustment of the position of the turbidity sensor 28 on the seabed.
[0020] Furthermore, the second motor 25 drives the winding disk 26 to rotate via the output shaft, and the winding disk 26 winds the towing rope 27 onto the winding disk 26 by rotating counterclockwise, and the towing rope 27 releases the towing rope 27 by rotating clockwise, and when the winding disk 26 winds, the towing rope 27 moves the turbidity sensor 28 upward, and when the winding disk 26 unwinds, the towing rope 27 moves the turbidity sensor 28 downward, thereby adjusting the height of the turbidity sensor 28 on the seabed to an appropriate level.
[0021] Furthermore, two sets of studs 31 are installed, and circular holes are opened on the surface of the tightening nut 33, and the studs 31 are connected by passing through the holes on the surface of the studs 31. The two sets of studs 31 are used to ensure the parallelism of the counterweight, and the studs 31 limit the positions of the sets of counterweight disks 32 on the mounting plate 3.
[0022] Furthermore, multiple sets of counterweight discs 32 are installed, and multiple sets of mounting plates 3 are stacked on the surface of the mounting plate 3, and tightening nuts 33, combined with studs 31, restrict the multiple sets of counterweight discs 32 on the surface of the mounting plate 3, thereby realizing the positioning of the turbidity sensor 28 and ensuring the stability of the turbidity sensor 28 as it moves along the seabed.
[0023] Working principle: When the position of the moving vessel 1 is offset due to factors such as waves and water currents, the automation system drives the first motor 21 according to a preset program and data fed back from the sensors, and its output shaft rotates to move the guide screw 22. The screw is connected to the square nut 23 by a thread, so that the nut slides on the surface of the guide bracket 2 and moves the adjustment plate 24, the winding disc 26 and the towing rope 27 to move synchronously, adjusting the lateral position of the turbidity sensor 28 to match the shield channel. The system also controls the electric push rod 29, and the extension and contraction of its piston rod causes the second motor 25 and the adjustment plate 24 to rotate around the rotation axis of the nut and move the winding disc 26 and the towing rope 27 to change the vertical position of the sensor. The second motor 25 drives the winding disc 26 to rotate, and the towing rope 27 can be retracted and released to adjust the height of the turbidity sensor 28. After the position of the moving vessel 1 is offset, the position of the turbidity sensor 28 can be adjusted in a timely manner to avoid the position offset and ensure the monitoring accuracy of the turbidity sensor 28.
[0024] The mounting plate 3 in the counterweight mechanism is fixed to the end of the towing rope 27, and a stud 31 is fixed to the surface of the mounting plate 3. Multiple sets of counterweight discs 32 are stacked on the mounting plate 3, passing through the studs 31, and finally fastened with a clamping nut 33. When the water current in the construction area is relatively fast, the number of counterweight discs 32 can be increased to ensure the stable position of the turbidity sensor 28 on the seabed and prevent it from being swept away or swinging significantly by the water current, which would affect the monitoring effect. When the water current is relatively slow, the number of counterweight discs 32 can be reduced to prevent the counterweight from being too heavy and subjecting the towing rope 27 to excessive pulling force, which would also affect the movement flexibility of the turbidity sensor 28. [Explanation of symbols]
[0025] 1 Mobile Hull 11 Liquid level sensor 12 Water quality component sensor 2 guide brackets 21 First Motor 22 Guide screw 23 Square nut 24 Adjustment plate body 25 Second Motor 26 Winding disc 27 Tow rope 28 Turbidity sensor 29 Electric push rod 3 Mounting plate 31 studs 32 Counterweight disc 33 Clamping nut
Claims
1. A grout well-up monitoring device for a sea surface in a shield construction crossing a sea area portion, comprising a mobile hull, a monitoring mechanism installed on the surface of the mobile hull, the monitoring mechanism including a liquid level sensor, the liquid level sensor being fixedly connected to the bottom of the mobile hull, a water quality component sensor being installed on the side of the mobile hull, a guide bracket being fixedly connected to the surface of the mobile hull, the guide bracket being fixedly connected to the surface of the mobile hull, a first motor being fixedly connected to the surface of the guide bracket, a guide screw being fixedly connected to the output shaft of the first motor, and a surface of the guide screw. a square nut connected by a screw thread on top of the square nut, an adjusting plate rotatably connected on the surface of the square nut, a second motor fixedly connected on the surface of the adjusting plate, a winding disk fixedly connected on the output shaft of the second motor, a towing rope wound and connected on the surface of the winding disk, a turbidity sensor installed on the end of the towing rope, an electric push rod rotatably connected on the surface of the square nut, and a piston rod of the electric push rod rotatably connected to the bottom of the second motor.
2. 2. The grout well-up monitoring device for a sea surface in a shield construction crossing a sea area portion according to claim 1, characterized in that a counterweight mechanism is installed at the end of the towing rope, the counterweight mechanism including a mounting plate, the mounting plate being fixedly connected to the end of the towing rope, the turbidity sensor being fixedly connected to a bottom of the towing rope, a stud being fixedly connected to a surface of the mounting plate, a counterweight disk being connected to the surface of the stud through a hole, and a tightening nut being connected to the surface of the stud by a screw thread.
3. 2. The grout well-up monitoring device for a sea surface in a shield construction crossing a sea area portion as described in claim 1, characterized in that the first motor drives a guide screw to rotate by a piston rod, the guide screw drives a square nut to slide on the surface of the movable hull by rotation, and the square nut moves an adjustment plate to slide synchronously.
4. 2. The grout well-up monitoring device for a sea surface in a shield construction crossing a sea area portion according to claim 1, characterized in that a rotating shaft is installed on the surface of the square nut, the adjusting plate rotates on the square nut by the rotating shaft, the electric push rod pushes the adjusting plate so as to rotate on the square nut by the piston rod, and the electric push rod itself also rotates correspondingly.
5. 2. The grout well-up monitoring device for a sea surface in a shield construction crossing a sea area portion according to claim 1, characterized in that the second motor drives the winding disk to rotate by an output shaft, the winding disk winds the towing rope onto the winding disk by rotating counterclockwise, and the towing rope releases the towing rope by rotating clockwise.