Installation method of underwater high-strain detection sensor for offshore wind power steel pipe pile

Abstract

The invention discloses an installation method for an underwater high-strain detection sensor of an offshore wind power steel pipe pile. The installation method comprises the steps that an auxiliary device is pre-installed at the pre-installation position of a pile body; a sensor is installed at the preset position of the pile body based on the auxiliary device; dismounting the sensor and making a positioning mark; marking on the positioning mark by using an auxiliary positioning belt; sinking the pile to a preset elevation; the sensor dives to be near the positioning mark, and the mounting position of the sensor is found based on the auxiliary positioning belt; installing a sensor at the installation position; and after pile sinking is finished, the sensor is dismantled. Before pile sinking, the preset position for mounting the sensor is made in advance at the preset position of the pile body, when the pile is sunk to the preset elevation, a diver can quickly position the mounting position of the sensor by means of the auxiliary positioning belt, and mounting of the sensor and dismounting work after pile sinking are completed within a short time; and the technical problems of limited visual field of underwater operation, long time consumption of diving operation, high risk and the like are effectively solved.

Description

Technical Field

[0001] The present application belongs to the field of offshore wind power technology, and specifically relates to a method for installing an underwater high-strain detection sensor for an offshore wind power steel pipe pile. Background Art

[0002] The main types of offshore wind turbine foundations are single pile foundation, four-pile jacket foundation and suction bucket jacket foundation. For single pile foundation and four-pile jacket foundation, high strain of the piles is required to determine the bearing capacity of the pile foundation.

[0003] As China's offshore wind power development moves toward deeper waters, some newly built offshore wind farms reach depths exceeding 50 meters, creating complex sea conditions. These areas are subject to significant influence from natural factors, including strong winds and waves, particularly winter cold snaps, summer monsoons, and swells in the open sea. This results in limited operating time and harsh sea conditions at construction sites. The four-pile jacket foundations used in many domestic offshore wind farms are located near the mud surface, approximately 30 to 50 meters below the water surface. Sensors are also installed approximately 30 to 50 meters below the water surface.

[0004] However, there are still the following technical difficulties in the process of installing the sensor: (1) Limited vision during underwater operations: Because underwater operations are mostly carried out near the mud surface, the seawater may become turbid due to pile driving, which limits the vision of divers and makes it difficult to quickly find the sensor installation location. In addition, the screw holes are very small, making it difficult to quickly find the accurate hole position. (2) Diving operations are time-consuming and risky: It takes about 20 to 30 minutes to install the sensor underwater, and decompression is required when surfacing. For example, if the operation takes 20 to 25 minutes at a depth of 45 to 50 meters, the decompression process during surfacing will take about 50 to 60 minutes. Summary of the Invention

[0005] In view of the shortcomings or deficiencies of the above-mentioned prior art, the technical problem to be solved by the present application is a method for installing an underwater high-strain detection sensor for offshore wind power steel pipe piles.

[0006] To solve the above technical problems, this application is implemented through the following technical solutions: On one hand, this application proposes a method for installing an underwater high-strain detection sensor for an offshore wind power steel pipe pile, comprising: Pre-install the auxiliary device at the pre-installation position of the pile body; The sensor is installed at a preset position of the pile body based on the auxiliary device; Remove the sensor and mark its location; Mark the positioning mark with an auxiliary positioning tape; Sink piles to the preset elevation; Diving down to the vicinity of the positioning mark, and finding the installation position of the sensor based on the auxiliary positioning belt; installing the sensor at the installation location; After the pile driving is completed, the sensor is removed.

[0007] Further optionally, the above-mentioned pre-installation of the auxiliary device in the pre-installation position of the pile body includes: pre-installing the auxiliary device in the pre-installation position of the pile body through the screw holes set at its four corners, and synchronously calibrating the horizontality of the base and the verticality of the pile body axis, wherein the auxiliary device includes: an adjustable positioning base, the adjustable positioning base includes an arc-shaped base body, screw holes with anti-loosening washers symmetrically distributed at the four corners, and a laser positioning module integrated on the top, to ensure that the verticality error between the base and the pile body axis is ≤0.3°.

[0008] Further optionally, in the above-mentioned installation of the sensor at a preset position of the pile body based on the auxiliary device, the method includes: after the auxiliary device is fixed, fixing the sensor on the pile body, making a positioning mark, removing the sensor, and making a positioning mark on the sensor.

[0009] Further optionally, the axis scale projected by the laser positioning module of the auxiliary device is first aligned with a preset installation line of the pile body, and then the sensor is fixed in the installation groove of the pile body; The installation groove is a stepped waterproof groove, the bottom of the waterproof groove is provided with a drainage hole, and the groove wall is provided with a guide boss. When the sensor is embedded, it slides along the guide boss to ensure the consistency of the installation posture; the groove edge of the waterproof groove is provided with an arc chamfer.

[0010] Further optionally, the above-mentioned use of an auxiliary positioning tape to mark the positioning mark includes: after the positioning mark is completed, using quick-drying waterproof glue to stick the auxiliary positioning tape on the horizontal plane of the positioning mark position, so that divers can find the installation position of the sensor by touch underwater, and the auxiliary positioning tape is made of polyurethane material that is resistant to seawater aging and is doubly fixed to the positioning mark position by "magnetic attraction + waterproof glue"; and / or, the auxiliary positioning tape is provided with tactile protrusions at equal intervals to form a touch recognition mark.

[0011] Further optionally, the above-mentioned pile driving to the preset elevation includes: if the verticality exceeds 3‰ during the pile driving process, correcting the deviation; pausing the pile driving when the pile is driven to a position 2-3 m away from the elevation, and simultaneously checking the verticality of the pile body; The suspension depth of pile driving is dynamically adjusted through the "geology-pile diameter" linkage formula: when the pile diameter is ≥2.5m or the geology is moderately weathered rock, the suspension depth is set to 3m; When the pile diameter is less than 2.5m and the geology is silty clay, the pause depth is set to 2m; Further optionally, in the above-mentioned installation of the sensor at the installation position, it includes: after finding the installation position, first embedding the water-swellable waterproof sealing ring into the sealing groove of the installation groove, then pressing the sensor into the sealing groove along the guide boss, rotating the quick-release buckle on the side of the sensor so that the buckle engages with the groove of the sealing groove wall to complete the initial fixation; wherein, the quick-release buckle is provided with anti-slip grooves, and can be operated by a diver wearing gloves.

[0012] Further optionally, the sensor is preliminarily fixed by the mounting groove and the clip on the mounting groove; the mounting groove is a barbed structure, and the maximum release force after the clip is engaged is ≥300N; a positioning pin hole is set at the bottom of the mounting groove, and a positioning pin is set at the corresponding position of the sensor. When the sensor is pressed into the mounting groove, the positioning pin is inserted into the pin hole to achieve radial positioning, thereby avoiding the displacement of the sensor caused by the vibration of the pile driving.

[0013] Further optionally, the sensor is fastened to a preset position of the pile body by a stainless steel mounting screw, and a water-swellable waterproof sealing ring is embedded in the gap between the mounting groove and the sensor; the mounting screw is a corrosion-resistant quick-tightening screw, the head of the mounting screw is provided with a hexagonal anti-slip groove, and the rod surface of the mounting screw is coated with polytetrafluoroethylene. Further optionally, the mounting screws are installed using a diagonal tightening method, with the tightening torque controlled at 15-20 N·m to ensure sealing performance while preventing the mounting screws from being over-tightened and damaging the mounting slot.

[0014] Further optionally, after the pile sinking is completed, the diver first removes the mounting screws of the sensor, and then loosens the buckle on the mounting slot until the sensor is removed, and then cleans and performs performance testing on the sensor before recycling.

[0015] Compared with the existing technology, this application has the following technical effects: This application prepares a preset position for installing the sensor at a preset position on the pile body before sinking the pile. When the pile is sunk to the preset elevation, the diver can quickly locate the installation position of the sensor with the help of an auxiliary positioning belt, and complete the installation of the sensor and the removal work after the pile sinking in a relatively short time, thereby reducing the underwater operation time by about 5 to 10 minutes and shortening the underwater operation time to 15 to 20 minutes. This effectively avoids technical problems such as limited underwater operation vision, long diving time, and high risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1: Flowchart of a method for installing an underwater high-strain detection sensor for an offshore wind power steel pipe pile according to an embodiment of the present application; Figure 2 : Schematic diagram of the installation structure of an underwater high-strain detection sensor for offshore wind power steel pipe piles according to one embodiment of the present application; Figure 3 : The force curve measured in one embodiment of the present application and the force curve obtained by fitting and calculating using the CAPWAPC method; Figure 4 : A graph showing the force and velocity measured in an embodiment of the present application; Figure 5 : Loading diagram of the force calculated by the CAPWAPC method in one embodiment of the present application; Figure 6 : Distribution diagram of pile side friction resistance in one embodiment of the present application. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0018] like Figure 1 As shown, in one embodiment of the present application, a method for installing an underwater high strain detection sensor for an offshore wind power steel pipe pile includes: Pre-install the auxiliary device at the pre-installation position of the pile body; The sensor 60 is installed at a preset position of the pile body based on the auxiliary device; Remove the sensor 60 and mark its location; Mark the positioning mark with an auxiliary positioning tape; Sink piles to the preset elevation; Diving down to the vicinity of the positioning mark, and finding the installation position of the sensor 60 based on the auxiliary positioning belt; Install the sensor 60 at the installation location; After the pile driving is completed, the sensor 60 is removed.

[0019] This embodiment pre-determines the sensor 60 installation location at a preset position on the pile body before sinking the pile. Once the pile is sunk to the preset elevation, the diver can quickly locate the sensor 60 installation location using the auxiliary positioning belt. Both the sensor 60 installation and post-sinking removal can be completed in a relatively short period of time, reducing underwater operation time by approximately 5-10 minutes to 15-20 minutes. According to the "Technical Requirements for Decompression in Air Diving" (GB / T12521-2008), this reduced underwater operation time can shorten decompression time to 20-30 minutes, reducing the entire underwater operation time from entry to exit by 30-40 minutes, significantly reducing the diver's underwater time.

[0020] Among them, according to the Chinese national standard air diving decompression table in the "Technical Requirements for Air Diving Decompression" (GB / T 12521-2008), the operation time at a water depth of 45~50m is 20~25 minutes, and the ascent process requires about 50~60 minutes of decompression.

[0021] In one of the embodiments of this application, the specific pile sinking process can be referred to Figure 2 As shown, the auxiliary pile 10 is used to install the guide cylinder 20, and the guide cylinder 20 is used to provide a guiding effect for the sinking of the steel pipe pile 50; during the pile sinking process, the pile driver 40 and the hydraulic hammer 30 are preferably used to sink the steel pipe pile 50, and the figure also illustrates the installation position of the sensor 60 on the pile body of the steel pipe pile 50.

[0022] In this embodiment, further, in the above-mentioned pre-installation of the auxiliary device in the pre-installation position of the pile body, the method includes: pre-installing the auxiliary device in the pre-installation position of the pile body through the screw holes provided at the four corners of the auxiliary device, and simultaneously calibrating the horizontality of the base and the verticality of the pile body axis, wherein the auxiliary device includes: an adjustable positioning base, the adjustable positioning base including an arc-shaped base body (the arc can be adapted to different pile diameters within the range of 120°-180° by adjusting the slider), screw holes with anti-loosening washers symmetrically distributed at the four corners, and a laser positioning module integrated at the top, to ensure that the verticality error between the base and the pile body axis is ≤0.3°. The auxiliary device preferably adopts a cubic frame structure surrounded by materials such as steel pipes, within which workers can stand and perform operations such as installation.

[0023] Furthermore, in this embodiment, the process of installing the sensor 60 at a preset position on the pile body using the auxiliary device includes: after the auxiliary device is fixed, the sensor 60 is fixed to the pile body, a positioning mark is made, the sensor 60 is removed, and the positioning mark is made on the sensor 60. The positioning mark facilitates subsequent divers to better locate the installation position of the sensor 60 during diving operations.

[0024] Specifically, the axis scale projected by the laser positioning module of the auxiliary device is first aligned with the preset installation line of the pile body, and then the sensor 60 is fixed in the installation groove (not shown in the figure) of the pile body (the groove depth is adapted to the thickness of the sensor); the installation groove is a stepped waterproof groove, and the bottom of the waterproof groove is provided with a drainage hole (hole diameter 3mm), and the groove wall is provided with a guide boss (height 2mm). When the sensor is embedded, it slides along the guide boss to ensure the consistency of the installation posture; the edge of the groove of the waterproof groove is provided with an arc chamfer (radius 5mm) to avoid scratches when the diver is operating.

[0025] Furthermore, the aforementioned use of an auxiliary positioning tape to mark the positioning mark includes: after the positioning mark is completed, the auxiliary positioning tape is affixed to the horizontal surface of the positioning mark using quick-drying waterproof glue to facilitate underwater tracing of the installation position of the sensor 60 by touch by a diver; the auxiliary positioning tape is made of a polyurethane material resistant to seawater aging and is fixed to the positioning mark position by a "magnetic attraction + waterproof glue" method; and / or, the auxiliary positioning tape is provided with evenly spaced tactile protrusions to form a touch recognition mark. The use of the aforementioned quick-drying waterproof glue is suitable for underwater environments and can meet the need for quick affixation; it facilitates the subsequent installation of the sensor 60 and saves time.

[0026] In this embodiment, the aforementioned pile driving to the preset elevation includes: if the verticality exceeds 3‰ during the pile driving process, deviation correction is performed; when the pile is driven to a position 2-3 m from the elevation, the pile driving is suspended, and the verticality of the pile body is simultaneously checked; the suspension depth of the pile driving is dynamically adjusted using a "geology-pile diameter" linkage formula: when the pile diameter is ≥2.5 m or the geology is moderately weathered rock, the suspension depth is set to 3 m; when the pile diameter is <2.5 m and the geology is silty clay, the suspension depth is set to 2 m. The aforementioned elevation position is only one example, and can be adaptively adjusted according to actual conditions during specific operations.

[0027] In this embodiment, the process of installing the sensor 60 at the aforementioned installation location includes: after finding the installation location, first inserting a water-swellable waterproof seal (expansion ratio 150%) into the sealing groove of the installation slot; then pressing the sensor 60 into the sealing groove along the guide boss; and rotating the quick-release buckle on the side of the sensor 60 (rotation angle 90°) so that the buckle engages with the groove of the sealing groove wall to complete the initial fixation. The quick-release buckle is provided with anti-slip grooves, allowing operation by divers wearing gloves. Furthermore, preferably, the installation slot is configured to match the installation location of the sensor 60 to facilitate better installation of the sensor 60.

[0028] In order to further stabilize the installation of the sensor 60, the present embodiment can preliminarily fix the sensor 60 through the installation groove and the clip on the installation groove; the installation groove is a barbed structure, and the maximum release force after the clip is engaged is ≥300N; a positioning pin hole is set at the bottom of the installation groove, and a positioning pin (diameter 8mm) is set at the corresponding position of the sensor 60. When the sensor 60 is pressed into the installation groove, the positioning pin is inserted into the pin hole to achieve radial positioning, thereby avoiding the displacement of the sensor 60 caused by the vibration of the pile driving.

[0029] Furthermore, the sensor 60 is fastened to the preset position of the pile body for the second time by means of stainless steel mounting screws, and a water-swelling waterproof sealing ring is embedded in the gap between the mounting groove and the sensor 60; the mounting screws are corrosion-resistant quick-tightening screws, the heads of the mounting screws are provided with hexagonal anti-slip grooves, and the rod surfaces of the mounting screws are coated with polytetrafluoroethylene coating (seawater corrosion resistance ≥ 5 years); the mounting screws are installed by means of diagonal tightening method, and the tightening torque is controlled at 15-20 N·m to ensure the sealing performance while preventing the mounting screws from being over-tightened and damaging the mounting groove.

[0030] Finally, after the pile sinking is complete, the diver removes the sensor 60's mounting screws and loosens the clips on the mounting slot until the sensor 60 is removed. The sensor is then cleaned, tested for performance, and retrieved. At this point, the sensor 60 installation for underwater pile foundation work is complete, and relevant measurement data has been collected.

[0031] This embodiment is further explained with a specific application example: For example, the underwater high-strain four-pile jacket foundation of the XXX project is 78m long, 3.3m in diameter, and 38-60mm thick. The pile top elevation is -43.00m, and the mud surface elevation is -49.69m. The sensor 60 is installed 4m below the pile top. Divers need to dive about 44m, and about 47m for removal.

[0032] After drilling holes and installing auxiliary devices and auxiliary positioning belts on the pile transporter, the pile was sunk to 3m above the elevation and the hammer was stopped. At this time, the diver started underwater operation with the underwater high strain sensor 60. It took a total of 18 minutes from the diver entering the water to the completion of the installation of the sensor 60, and a total of 25 minutes to float to the surface, and the total underwater operation time was 43 minutes. Figure 3-Figure 6 shown.

[0033] in, Figure 3 The force curve is the measured force curve and the force curve calculated by fitting the CAPWAPC method; Force Mcd---Measured force, refers to the measured force curve, the unit is kilonewton (kN); Force Cpt---Calculated force, refers to the force curve calculated by fitting the CAPWAPC method, in kilonewtons (kN); L / c---measurement duration, in milliseconds (ms). Where: L is the pile length, in meters (m), c is the stress wave velocity, in meters per second (m / s); in, Figure 4 Velocity Mcd is the measured force and velocity curve, which refers to the measured stress wave velocity in meters per second (m / s). Pile---Pile model; in, Figure 5 Loading diagram for forces calculated by the CAPWAPC method; Load---Loading force, unit is kilonewton (kN); Displacement---the displacement of the pile, in millimeters (mm); Ru---ultimate bearing capacity of a single pile obtained by CAPWAPC method, in kilonewtons (kN); Rs---the pile side friction resistance obtained by CAPWAPC method, in kilonewtons (kN); Rb---the pile tip soil resistance obtained by CAPWAPC method, in kilonewtons (kN); in, Figure 6 is the distribution diagram of pile side friction resistance; Shaft Resistance Distribution---Shaft resistance distribution diagram, unit: kilonewton per meter (kN / m); Pile Force at Ru---Pile axial force curve, unit is kilonewton (kN).

[0034] This application prepares a preset position for installing the sensor at a preset position on the pile body before sinking the pile. When the pile is sunk to the preset elevation, the diver can quickly locate the installation position of the sensor with the help of an auxiliary positioning belt, and complete the installation of the sensor and the removal work after the pile is sunk in a relatively short time, reducing the underwater operation time by about 5 to 10 minutes to 15 to 20 minutes; effectively avoiding technical problems such as limited vision during underwater operations, long diving operations, and high risks. In summary, this application has broad market application prospects.

[0035] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0036] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0038] The above embodiments are intended only to illustrate the technical solutions of the present application and are not intended to limit the present application. The present application is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application and should be included within the scope of the claims of the present application.

Claims

1. The installation method of underwater high strain detection sensor for offshore wind power steel pipe piles is characterized by: include: Pre-install the auxiliary device at the pre-installation position of the pile body; The sensor is installed at a preset position of the pile body based on the auxiliary device; Remove the sensor and mark its location; Mark the positioning mark with an auxiliary positioning tape; Sink piles to the preset elevation; Diving down to the vicinity of the positioning mark, and finding the installation position of the sensor based on the auxiliary positioning belt; installing the sensor at the installation location; After the pile driving is completed, the sensor is removed.

2. The method for installing an underwater high strain detection sensor for offshore wind power steel pipe piles according to claim 1, characterized in that: The above-mentioned pre-installation of the auxiliary device at the pre-installation position of the pile body includes: pre-installing the auxiliary device at the pre-installation position of the pile body through the screw holes provided at the four corners thereof, and simultaneously calibrating the horizontality of the base and the verticality of the pile body axis.

3. The method for installing an underwater high strain detection sensor for offshore wind power steel pipe piles according to claim 1, characterized in that: The method of installing the sensor at a preset position of the pile body based on the auxiliary device includes: after the auxiliary device is fixed, fixing the sensor on the pile body, making a positioning mark, removing the sensor, and making a positioning mark on the sensor.

4. The method for installing an underwater high strain detection sensor for offshore wind power steel pipe piles according to claim 3, characterized in that: First, align the axis scale projected by the laser positioning module of the auxiliary device with the preset installation line of the pile body, and then fix the sensor in the installation groove of the pile body; The installation groove is a stepped waterproof groove, the bottom of the waterproof groove is provided with a drainage hole, and the groove wall is provided with a guide boss. When the sensor is embedded, it slides along the guide boss to ensure the consistency of the installation posture; the groove edge of the waterproof groove is provided with an arc chamfer.

5. The method for installing an underwater high strain detection sensor for offshore wind power steel pipe piles according to claim 1, characterized in that: The above-mentioned use of the auxiliary positioning tape to mark the positioning mark includes: after the positioning mark is completed, the auxiliary positioning tape is adhered to the horizontal surface of the positioning mark position using quick-drying waterproof glue to facilitate the diver to find the installation position of the sensor by touch underwater, and the auxiliary positioning tape is made of polyurethane material resistant to seawater aging and is doubly fixed to the positioning mark position by "magnetic attraction + waterproof glue"; and / or, tactile protrusions at equal intervals are provided on the auxiliary positioning tape to form a touch recognition mark.

6. The method for installing an underwater high strain detection sensor for offshore wind power steel pipe piles according to claim 1, characterized in that: In the above-mentioned pile sinking to the preset elevation, the following procedures are included: if the verticality exceeds 3‰ during the pile sinking process, the deviation is corrected; when the pile is sunk to a position 2-3 m away from the elevation, the pile driving is suspended and the verticality of the pile body is tested simultaneously; The pause depth for pile driving is dynamically adjusted using the "geology-pile diameter" linkage formula: when the pile diameter is ≥2.5m or the geology is moderately weathered rock, the pause depth is set to 3m. When the pile diameter is less than 2.5 m and the geology is silty clay, the suspension depth is set to 2 m.

7. The method for installing an underwater high strain detection sensor for offshore wind power steel pipe piles according to claim 1, characterized in that: The above-mentioned method of installing the sensor at the installation position includes: after finding the installation position, first embedding the water-swellable waterproof sealing ring into the sealing groove of the installation groove, then pressing the sensor into the sealing groove along the guide boss, and rotating the quick-release buckle on the side of the sensor so that the buckle engages with the groove of the sealing groove wall to complete the initial fixation; wherein, the quick-release buckle is provided with anti-slip grooves, and can be operated by a diver wearing gloves.

8. The method for installing an underwater high strain detection sensor for offshore wind power steel pipe piles according to claim 7, characterized in that: The sensor is preliminarily fixed by the mounting groove and the buckle on the mounting groove; the mounting groove is a barbed hook structure, and the maximum release force after the buckle is engaged is ≥300N; a positioning pin hole is set at the bottom of the mounting groove, and a positioning pin is set at the corresponding position of the sensor. When the sensor is pressed into the mounting groove, the positioning pin is inserted into the pin hole to achieve radial positioning, thereby avoiding sensor displacement caused by pile driving vibration.

9. The method for installing an underwater high strain detection sensor for offshore wind power steel pipe piles according to claim 7 or 8, characterized in that: The sensor is fastened to the preset position of the pile body by a stainless steel mounting screw, and a water-swellable waterproof sealing ring is embedded in the gap between the mounting groove and the sensor; the mounting screw is a corrosion-resistant quick-tightening screw, the head of the mounting screw is provided with a hexagonal anti-slip groove, and the rod surface of the mounting screw is coated with polytetrafluoroethylene; The mounting screws are installed using a diagonal tightening method with a tightening torque controlled at 15-20 N·m to ensure sealing performance while preventing the mounting screws from being over-tightened and damaging the mounting slot.

10. The method for installing an underwater high strain detection sensor for offshore wind power steel pipe piles according to any one of claims 1 to 8, characterized in that: After the pile sinking is completed, the diver first removes the mounting screws of the sensor, and then loosens the buckle on the mounting slot until the sensor is removed. The sensor is then cleaned and tested for performance before being recycled.

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