Monitoring screw anchor device

Abstract

The invention discloses a monitorable screw anchor device which comprises a screw anchor which comprises a main body structure and an anchor wing arranged on the periphery of the main body structure. The monitoring assembly comprises strain gauges and / or shear plates, the strain gauges are arranged in the anchor wings and / or the side wall of the main body structure, the shear plates are arranged at the top, facing the construction face, of the main body structure, the strain gauges are used for monitoring the stress change of the spiral anchor, and the shear plates are used for monitoring the shear strength change of the spiral anchor; the signal processing assembly comprises a signal receiving unit and a signal processing unit, and the signal receiving unit is in communication connection with the stress piece and the shear plate; the signal processing unit is in communication connection with the signal receiving unit, and the signal processing unit is in communication connection with an external server; the power supply assembly is electrically connected with the monitoring assembly and the signal processing assembly, and is used for providing electric power required during working for the monitoring assembly; the signal processing assembly and the power supply assembly are arranged in the main body structure.

Description

Technical Field

[0001] This application relates to the fields of civil engineering, marine engineering and new energy facilities, and specifically to a monitoring spiral anchor device. Background Technology

[0002] Helical anchors, as a highly efficient foundation anchoring technology, are widely used in civil engineering, marine engineering, and new energy facilities (such as offshore wind power). They penetrate the soil by rotation, relying on the interaction between the anchor flanges and the soil to provide tensile and compressive bearing capacity. However, in actual construction, the penetration resistance and soil response of helical anchors are affected by geological conditions and installation parameters (such as torque, rotation speed, and penetration depth). Currently, there is a lack of real-time and accurate stress monitoring methods, leading to difficulties in construction quality control and even potential anchor damage or insufficient bearing capacity due to localized stress concentration. Existing technologies rely heavily on numerical simulations or post-construction soil tests for stress analysis of helical anchors, failing to reflect the dynamic stress distribution of the anchor flanges during penetration in real time. Furthermore, the shear properties of the soil at the tip of the helical anchor (such as shear strength) are crucial to anchoring performance, but traditional methods make direct measurement during construction difficult. Summary of the Invention

[0003] The purpose of this application is to provide an improved spiral anchor monitoring system, the specific technical solution of which is as follows:

[0004] A monitoring device for a spiral anchor includes: a spiral anchor, comprising a main structure and anchor wings disposed on the outer periphery of the main structure; a monitoring component, comprising strain gauges and / or shear plates, wherein the strain gauges are disposed within the anchor wings and / or within the sidewalls of the main structure, and the shear plates are disposed on the top of the main structure facing the construction surface; the strain gauges are used to monitor stress changes in the spiral anchor, and the shear plates are used to monitor shear strength changes in the spiral anchor; a signal processing component, comprising a signal receiving unit and a signal processing unit, wherein the signal receiving unit is communicatively connected to the stress gauges and the shear plates respectively, and is used to receive signals monitored by the stress gauges and the shear plates respectively; the signal processing unit is communicatively connected to the signal receiving unit, and is used to process the signals received by the signal receiving unit; the signal processing unit communicates with an external server, and is used to send the processed signals to the external server; and a power supply component, which is electrically connected to both the monitoring component and the signal processing component, and is used to provide the power required for the operation of both the monitoring component and the power supply component; the signal processing component and the power supply component are disposed within the main structure.

[0005] Strain gauges are evenly distributed within the anchor wing located in the lower half of the main structure. The shear plate is designed as a cross shape with a sharp top.

[0006] The spiral anchor is used on the seabed. The spiral anchor also includes a buoy and an anchor chain. The buoy is connected to the main structure as a whole through the anchor chain. The power supply component includes: an energy storage unit, which is electrically connected to the monitoring component and the signal processing component respectively; a linear generator (203), which includes a coil and a permanent magnet. The permanent magnet generates electricity by cutting relative to the coil. The coil is electrically connected to the energy storage unit and is used to transmit the generated electricity to the energy storage power source. The permanent magnet is set on the anchor chain and is used to use the swing of the anchor chain in the waves as the power for the permanent magnet to cut relative to the coil.

[0007] The float is equipped with a signal relay component, which is connected to the signal processing unit via an anti-interference signal transmission cable. The signal relay component communicates with an external server to transmit the signal processed by the signal processing unit to the external server after it reaches the sea surface, so as to avoid interference from seawater.

[0008] The signal relay component includes a storage unit and a communication unit. The storage unit is connected to the signal processing unit via an anti-interference signal transmission cable and is used to temporarily store the signal processed by the signal processing unit. The communication unit communicates with an external server and is used to send the signal temporarily stored in the storage unit to the external server after communication with the external server is established.

[0009] The anti-interference signal transmission cable and the anchor chain are installed in the same sleeve and are wound up and down at the same time to prevent problems such as tangling and knotting of the anchor chain and the anti-interference signal transmission cable during the winding and unwinding process.

[0010] The beneficial effects of this invention lie in the embedded high-precision strain gauges within the anchor wings of the helical anchor, enabling real-time monitoring of stress changes in each anchor wing during penetration. This data transmission provides a basis for optimizing construction parameters and assessing bearing capacity. A shear plate installed at the top of the helical anchor directly measures the soil shear strength through the torque-displacement relationship during penetration, aiding in the assessment of soil properties and anchoring effectiveness. This design achieves intelligent monitoring and testing during the construction and maintenance of helical anchors, solving the problems of missing dynamic stress data and real-time assessment of soil shear characteristics, significantly improving construction accuracy and structural safety. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the installation of the spiral anchor on the offshore platform in this application;

[0012] Figure 2 This is a schematic diagram showing the completed construction as described in this application;

[0013] Figure 3 This is a schematic diagram of the stress gauge and shear plate arrangement structure in this application, where 3022 is an enlarged schematic diagram of the strain gauge arrangement structure and 3041 is an enlarged schematic diagram of the sharp cross-shaped structure at the top of the shear plate.

[0014] Among them: 001-Offshore platform, 101-External server, 102-Construction equipment, 002-Anchor cable structure, 201-Anti-interference signal transmission cable, 202-Anchor chain, 203-Linear generator, 2031-Coil, 2032-Permanent magnet, 2033-Energy storage unit, 2034-Current direction, 204-Float, 003-Helical anchor, 301-Main structure, 302-Anchor wing, 3021-Strain gauge, 303-Drill bit, 304-Shear plate, 305-Signal receiving unit, 306-Signal processing unit. Specific Implementation

[0015] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0016] like Figure 2As shown, a monitoring device for a spiral anchor includes: a spiral anchor 003, which includes a main structure 301 and an anchor wing 302 disposed on the outer periphery of the main structure 301; a monitoring component, which includes a strain gauge 3021 and / or a shear plate 304, wherein the strain gauge 3021 is disposed within the anchor wing 302 and / or within the side wall of the main structure 301, and the shear plate 304 is disposed on the top of the main structure 301 facing the construction surface; the strain gauge 3021 is used to monitor the stress change of the spiral anchor 003, and the shear plate 304 is used to monitor the shear strength change of the spiral anchor 003; and a signal processing component, which includes a signal receiving unit 305 and a signal processing unit 306. 06. The signal receiving unit 305 is communicatively connected to the stress gauge and shear plate 304 respectively, and is used to receive the signals monitored by the stress gauge and shear plate 304 respectively. The signal processing unit 306 is communicatively connected to the signal receiving unit 305, and is used to process the signals received by the signal receiving unit 305. The signal processing unit communicates with the external server 101 to send the processed signals to the external server 101. The power supply component is electrically connected to the monitoring component and the signal processing component, and is used to provide the power required for the monitoring component to work. The signal processing component and the power supply component are set in the main structure 301. High-precision strain gauges 3021 are embedded in the anchor wings 302 of the spiral anchor 003 to monitor the stress changes of each anchor wing 302 in real time during the penetration process. By transmitting data, it provides a basis for optimizing construction parameters and assessing bearing capacity. The shear plate 304 installed at the top of the spiral anchor 003 directly measures the soil shear strength through the torque-displacement relationship during penetration, which helps to judge the soil properties and anchoring effect. This design enables intelligent monitoring and testing of the construction and operation of the spiral anchor 003, solving the problems of missing dynamic stress data and real-time assessment of soil shear properties, and can significantly improve construction accuracy and structural safety.

[0017] Stress distribution formula during the screw anchor 003 screwing-in process:

[0018] The stress distribution of the anchor wing 302 was calculated using data from strain gauge 3021, as follows:

[0019]

[0020] in, E: Stress at depth y of anchor wing 302 (Pa), E: Elastic modulus of helical anchor 003 material (Pa) The strain value (dimensionless) measured by strain gauge 3021 varies with depth y. Strain gauge 3021 is uniformly distributed in the lower half of the anchor wing 302, converting strain into stress through Hooke's law.

[0021] Shear strength formula for 304 stainless steel plate:

[0022] The shear strength of the seabed soil was calculated using the resistance of the 304 shear plate, as follows:

[0023]

[0024] in, : Soil shear strength (Pa), F: Resistance force on shear plate 304 (N), measured by sensor, A: Contact area between shear plate 304 and soil (m²) 2 k: empirical coefficient (related to soil type), Soil density (kg / m³) The screw anchor 003 has a screw-in speed (m / s) and shear strength composed of static resistance (F / A) and dynamic resistance (related to the square of the speed).

[0025] Formula for total resistance torque of spiral anchor 003:

[0026] The estimated torque required to screw in the drive helical anchor 003 is as follows:

[0027]

[0028] Where M: total resistance torque (N·m), r: radius of helical anchor 003 (m), L: length of anchor wing 302 (m)

[0029] The coefficient of friction between the anchor wing 302 and the soil. The additional torque generated by the shear plate 304. The drag torque is caused by the frictional stress on the surface of the anchor wing 302. The integral of the shear plate 304 and its resistance contribution.

[0030] Strain gauges 3021 are uniformly arranged within the anchor wing 302 located in the lower half of the main structure 301. The shear plate 304 is configured as a cross-shaped structure with a sharp tip. In practical applications, a drill bit 303 is provided at the end of the main structure 301 facing the construction surface. The shear plate 304 can be configured as a cross-shaped structure with a sharp tip and replace part of the drill bit 303. The sharp-tipped cross-shaped shear plate 304 collects changes in shear strength during drilling into the seabed and also functions as the helical anchor 003 drill bit 303, reducing resistance during drilling into the seabed.

[0031] The spiral anchor 003 is used on the seabed. The spiral anchor 003 also includes a buoy 204 and an anchor chain 202. The buoy 204 is connected to the main structure 301 as a whole through the anchor chain 202. The power supply component includes: an energy storage unit 2033, which is electrically connected to the monitoring component and the signal processing component respectively; and a linear generator 203, which includes a coil 2031 and a permanent magnet 2032. The permanent magnet 2032 generates electricity by cutting relative to the coil 2031. The coil 2031 is electrically connected to the energy storage unit 2033 and is used to transmit the generated electricity to the energy storage power source. The permanent magnet 2032 is set on the anchor chain 202 and is used to use the swing of the anchor chain 202 in the waves as the power for the permanent magnet 2032 to cut relative to the coil 2031.

[0032] The float 204 is equipped with a signal relay component. The signal relay component is connected to the signal processing unit 306 through an anti-interference signal transmission cable 201. The signal relay component communicates with the external server 101 to transmit the signal processed by the signal processing unit 306 to the external server 101 after it is sent out of the sea, so as to avoid interference from seawater.

[0033] The signal relay component includes a storage unit and a communication unit. The storage unit is connected to the signal processing unit 306 via an anti-interference signal transmission cable 201 and is used to temporarily store the signal processed by the signal processing unit 306. The communication unit communicates with the external server 101 and is used to send the signal temporarily stored in the storage unit to the external server 101 after the communication with the external server 101 is established.

[0034] The anti-interference signal transmission cable 201 and the anchor chain 202 are installed in the same sleeve and are wound up and down at the same time to prevent problems such as tangling and knotting of the anchor chain 202 and the anti-interference signal transmission cable 201 during the winding and unwinding process.

[0035] To make the present invention easier to understand, it will be further explained below in conjunction with practical applications.

[0036] like Figure 1 and 2 As shown:

[0037] S1. After transporting the aforementioned monitorable helical anchor 003 device to the target location via the offshore platform 001, the anchor cable structure 002, composed of an anti-interference signal transmission cable 201 and an anchor chain 202, is released via the construction equipment 102 until the device is lowered to the seabed. The helical anchor 003 relies on gravity to vertically embed itself into the soil until the resistance is balanced. During this process, the linear generator 203 operates, transmitting the generated electricity to the energy storage unit 2033. The energy storage unit 2033 then supplies power along the current direction 2034 to the monitoring components and signal processing components, enabling them to start and operate normally. Alternatively, the monitoring components and signal processing components can be powered via the offshore platform 001.

[0038] S2. Drive the spiral anchor 003 to rotate, and the spiral anchor 003 continues to spin into the deep soil under the action of torque; during this process, the strain gauges 3021 and shear plates 304 in the anchor wing 302 and the side wall of the main structure 301 begin to monitor the digital signals of stress and soil shear strength changes during the spiral anchor 003's spin-in process, and send the obtained signals to the signal processing unit 306. The integrated and processed data is uploaded to the external server 101 mounted on the offshore platform 001 for real-time monitoring via the anti-interference signal transmission cable 201.

[0039] S3. After completing the installation of the helical anchor 003 and collecting digital signals of stress and soil shear strength changes during the process of the helical anchor 003 being screwed into the soil, the offshore platform 001 can sail away. At this time, the device can continue to monitor the stress and soil shear strength changes of the helical anchor 003 during daily use, and upload the processed signals to the storage unit set in the float 204 for temporary storage via the anti-interference signal transmission cable 201. The offshore platform 001, equipped with an external server 101, will come back to collect the temporarily stored signals in the storage unit in the float 204 after a preset time, or directly transmit the temporarily stored signals back to the external server 101 via satellite communication.

Claims

1. A monitorable screw anchor device, characterized in that The application relates to a spiral anchor (003) comprising a main body structure (301) and anchor wings (302) arranged on the periphery of the main body structure (301); a monitoring assembly comprising strain gauges (3021) arranged in the anchor wings (302) and / or in the side walls of the main body structure (301) and / or shear plates (304) arranged on the top of the main body structure (301) facing the construction surface, wherein the strain gauges (3021) are used for monitoring the stress changes of the spiral anchor (003), and the shear plates (304) are used for monitoring the shear strength changes of the spiral anchor (003); a signal processing assembly comprising a signal receiving unit (305) and a signal processing unit (306), wherein the signal receiving unit (305) is connected with the stress gauges and the shear plates (304) in communication respectively, and is used for receiving the signals monitored by the stress gauges and the shear plates (304) respectively; the signal processing unit (306) is connected with the signal receiving unit (305) in communication, and is used for processing the signals received by the signal receiving unit (305), and the signal processing unit (306) is connected with an external server (101) in communication, and is used for sending the signals processed by the signal processing unit (306) to the external server (101); a power supply assembly which is electrically connected with the monitoring assembly and the signal processing assembly respectively, and is used for providing the power required by the monitoring assembly and the signal processing assembly during operation; the signal processing assembly and the power supply assembly are arranged in the main body structure (301). ​ ​ ​ ​ ​ 2. The monitorable screw anchor apparatus as described in claim 1, wherein, ​ 3. The monitorable screw anchor apparatus as described in claim 1, wherein, ​ 4. The monitorable helix anchor apparatus as claimed in claim 1, said helix anchor (003) for seabed, said helix anchor (003) further comprising a float (204) and a chain (202), said float (204) being connected integrally with said main body structure (301) through said chain (202), characterized in that, ​ ​ ​ 5. The monitorable screw anchor apparatus as described in claim 4, wherein, ​ 6. The monitorable screw anchor apparatus as described in claim 5, wherein, The signal relay assembly comprises a storage unit and a communication unit, the storage unit is connected with the signal processing unit (306) through the anti-interference signal transmission cable (201), and is used for temporarily storing the signal processed by the signal processing unit (306); the communication unit communicates with an external server (101), and is used for transmitting the signal temporarily stored in the storage unit to the external server (101) after the communication with the external server (101) is connected.

7. The monitorable screw anchor apparatus as described in claim 5, wherein, The anti-interference signal transmission cable (201) and the anchor chain (202) are arranged in the same sleeve and are retracted and released at the same time, so that the problems of winding and knotting of the anchor chain (202) and the anti-interference signal transmission cable (201) during the retraction and release of the anchor chain (202) and the anti-interference signal transmission cable (201) are prevented.

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