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

Abstract

The application discloses a method for installing an underwater high-strain detection sensor of a steel pipe pile of offshore wind power, comprising the following steps: pre-installing an auxiliary device at a pre-installed position of a pile body; installing the sensor at a preset position of the pile body based on the auxiliary device; removing the sensor and marking a position; marking the position on the auxiliary positioning belt; sinking the pile to a preset elevation; diving to the vicinity of the position; finding the installation position of the sensor based on the auxiliary positioning belt; installing the sensor at the installation position; and removing the sensor after the sinking of the pile is completed. The application pre-marks the installation position of the sensor at the preset position of the pile body before the pile is sunk, and when the pile is sunk to the preset elevation, a diver can quickly locate the installation position of the sensor with the help of the auxiliary positioning belt, and the installation of the sensor and the removal of the sensor after the sinking of the pile is completed can be completed in a short time, so that the technical problems of limited underwater operation field of vision, long time consumption of diving operation and high risk are effectively avoided.

Description

Technical Field

[0001] This application belongs to the field of offshore wind power technology, specifically relating to the installation method of underwater high strain detection sensors for offshore wind power steel pipe piles. Background Technology

[0002] The main types of offshore wind turbine foundations are monopile foundations, four-pile jacket foundations, and suction bucket jacket foundations. For monopile foundations and four-pile jacket foundations, it is necessary to determine the bearing capacity of the pile foundation by high strain testing.

[0003] As China's offshore wind power development extends into deeper waters, some newly built offshore wind farms are located in waters over 50 meters deep, with complex sea conditions. These areas are heavily influenced by natural environmental factors such as strong winds and waves, especially winter cold waves, summer monsoons, and swells in open seas. This results in limited working time and harsh sea conditions at construction sites. Many domestic offshore wind farms use four-pile jacket foundations with the top of the piles positioned near the mud surface, approximately 30-50 meters below the water surface. Sensor installation locations are also approximately 30-50 meters below the water surface.

[0004] However, the following technical difficulties exist in the process of installing the sensor: (1) Limited field of vision for underwater operations: Because underwater operations are mostly near the mud surface, the seawater may become turbid due to pile driving, limiting the diver's field of vision and making it difficult to quickly find the sensor installation position. 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. When surfacing, decompression is required. For example, if the operation takes 20 to 25 minutes at a water depth of 45 to 50 meters, the surfacing process will require about 50 to 60 minutes of decompression. Summary of the Invention

[0005] In view of the shortcomings or deficiencies of the prior art, the technical problem to be solved by this application is the installation method of underwater high strain detection sensor for offshore wind power steel pipe piles.

[0006] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0007] This application proposes a method for installing underwater high-strain detection sensors on offshore wind turbine steel pipe piles, including:

[0008] The auxiliary device is pre-installed at the pre-installation position on the pile body;

[0009] The sensor is installed at a preset position on the pile body using an auxiliary device;

[0010] Remove the sensor and mark its location;

[0011] Use an auxiliary positioning tape to mark the positioning mark;

[0012] Drive the piles to the preset elevation;

[0013] Submerging to the vicinity of the positioning mark, finding the installation position of the sensor based on the auxiliary positioning tape;

[0014] Installing the sensor at the installation position;

[0015] After the pile sinking is completed, the sensor is removed.

[0016] Further optionally, in the pre-installation of the auxiliary device in the pre-installation position of the pile body, the auxiliary device is pre-installed in the pre-installation position of the pile body through the screw holes provided at the four corners of the auxiliary device, and the horizontal degree of the base and the vertical degree of the pile body axis are calibrated synchronously, wherein the auxiliary device comprises an adjustable positioning base, the adjustable positioning base comprises an arc-shaped base body, four symmetrically distributed screw holes with anti-loosening washers, and a top-integrated laser positioning module, and the vertical degree error between the base and the pile body axis is ensured to be less than or equal to 0.3°.

[0017] Further optionally, in the installation of the sensor in the preset position of the pile body based on the auxiliary device, after the auxiliary device is fixed, the sensor is fixed on the pile body, the positioning mark is made, the sensor is removed, and the positioning mark of the sensor is made.

[0018] Further optionally, the axis scale projected by the laser positioning module of the auxiliary device is aligned with the preset installation line of the pile body, and then the sensor is fixed in the installation groove of the pile body;

[0019] The installation groove is a stepped waterproof groove, the groove bottom of the waterproof groove is provided with a drainage hole, and the groove wall is provided with a guide boss, the sensor is embedded along the guide boss to ensure the consistency of the installation posture; and the edge of the groove opening of the waterproof groove is provided with an arc chamfer.

[0020] Further optionally, in the marking on the positioning mark using the auxiliary positioning tape, after the positioning mark is completed, the auxiliary positioning tape is pasted on the horizontal plane at the positioning mark position using quick-drying waterproof glue, so as to facilitate the diver to find the installation position of the sensor underwater by touching; the auxiliary positioning tape is made of polyurethane material resistant to seawater aging and is fixed at the positioning mark position through "magnetic attraction + waterproof glue"; and / or the auxiliary positioning tape is provided with equidistant tactile protrusions to form a touch recognition mark.

[0021] Further optionally, in the pile sinking to the preset mark, if the vertical degree exceeds 3‰ during the pile sinking, the pile is corrected; the pile sinking is paused when the pile is sunk to a position 2-3 m away from the mark, and the vertical degree of the pile body is detected synchronously.

[0022] Among them, the pile sinking pause depth is dynamically adjusted by the "geology-pile diameter" linkage formula: when the pile diameter is greater than or equal to 2.5m or the geology is medium weathered rock stratum, the pause depth is set to 3m;

[0023] When the pile diameter is less than 2.5m and the geology is silty clay, the pause depth is set to 2m;

[0024] Further optionally, in the above installing the sensor at the installation position, after finding the installation position, the water-swelling waterproof sealing ring is first embedded into the sealing groove of the installation groove, then the sensor is pressed into the sealing groove along the guide boss, the quick-release buckle on the side of the sensor is rotated to make the buckle engage with the clamping groove on the wall of the sealing groove, and the preliminary fixation is completed; wherein the quick-release buckle is provided with anti-slip lines, and the diver can operate it by wearing gloves.

[0025] Further optionally, the sensor is preliminarily fixed by the installation groove and the buckle on the installation groove; the installation groove is a barb structure, and the maximum escape force after the buckle engagement is greater than or equal to 300N; the bottom of the installation groove is provided with a positioning pin hole, and the sensor is provided with a positioning pin at the corresponding position, the positioning pin is inserted into the pin hole when the sensor is pressed into the installation groove, radial positioning is realized, and the sensor is prevented from being deviated due to pile sinking vibration.

[0026] Further optionally, the sensor is secondarily fastened to the preset position of the pile body by a stainless steel installation screw, and a water-swelling waterproof sealing ring is embedded between the installation groove and the gap of the sensor; the installation screw is a corrosion-resistant quick screw, the head of the installation screw is provided with a hexagonal anti-slip groove, and the surface of the rod of the installation screw is coated with a polytetrafluoroethylene coating;

[0027] Further optionally, the diagonal tightening method is adopted when the installation screw is installed, the tightening torque is controlled to be 15-20N·m, the sealing performance is ensured, and the installation groove is prevented from being damaged by over-tightening of the installation screw.

[0028] Further optionally, after the pile sinking is completed, the diver first removes the installation screw of the sensor, then loosens the buckle on the installation groove, until the sensor is removed, and the sensor is cleaned and detected for performance before being recycled.

[0029] Compared with the prior art, the application has the following technical effects:

[0030] This application pre-determines the installation position of the sensor at a predetermined location on the pile before pile driving. When the pile is driven to the predetermined elevation, divers 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 its removal after pile driving in a short time. This reduces underwater operation time by about 5 to 10 minutes, shortening it to 15 to 20 minutes. It effectively avoids technical problems such as limited underwater visibility, long diving time, and high risks. Attached Figure Description

[0031] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0032] Figure 1 This application includes a flowchart of an embodiment of an underwater high-strain detection sensor for offshore wind power steel pipe piles.

[0033] Figure 2 This application presents a schematic diagram of the installation structure of an underwater high-strain detection sensor for offshore wind power steel pipe piles according to an embodiment.

[0034] Figure 3 In one embodiment of this application, the measured force curve is compared with the force curve calculated by fitting the CAPWAPC method.

[0035] Figure 4 A measured force versus velocity curve in one embodiment of this application;

[0036] Figure 5 A loading diagram of forces calculated by the CAPWAPC method in one embodiment of this application;

[0037] Figure 6 : A distribution diagram of pile side friction in one embodiment of this application. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] like Figure 1 As shown in one embodiment of this application, the installation method of the underwater high-strain detection sensor for offshore wind power steel pipe piles includes:

[0040] The auxiliary device is pre-installed at the pre-installation position on the pile body;

[0041] The sensor 60 is installed at a preset position on the pile body using an auxiliary device;

[0042] Remove the sensor 60 and mark its location;

[0043] Use an auxiliary positioning tape to mark the positioning mark;

[0044] Drive the piles to the preset elevation;

[0045] The vessel descends to the vicinity of the positioning mark and locates the installation position of the sensor 60 based on the auxiliary positioning strip.

[0046] The sensor 60 is installed at the specified mounting location;

[0047] After the pile driving is completed, the sensor 60 is removed.

[0048] In this embodiment, a pre-defined position for installing the sensor 60 is pre-marked on the pile before pile driving. Once the pile reaches the preset elevation, the diver can quickly locate the sensor 60 using an auxiliary positioning belt, and complete the installation and removal of the sensor 60 within a short time. This reduces underwater operation time by approximately 5-10 minutes, shortening it to 15-20 minutes. According to the requirements of "Air Diving Decompression Technical Requirements" (GB / T12521-2008), due to the reduced underwater operation time, decompression time can be shortened to 20-30 minutes, and the entire underwater operation time from entry to exit can be reduced by 30-40 minutes, significantly reducing the diver's underwater stay time.

[0049] According to the Chinese national standard air diving decompression table in "Technical Requirements for Air Diving Decompression" (GB / T 12521-2008), decompression takes 20-25 minutes at a water depth of 45-50m, and approximately 50-60 minutes during the ascent process.

[0050] In one embodiment of this application, the specific pile driving process can be referred to Figure 2 As shown, the auxiliary pile 10 is used to install the guide cylinder 20, which is used to guide the sinking of the steel pipe pile 50; during the pile driving process, the pile driver 40 and the hydraulic hammer 30 are preferably used to drive the steel pipe pile 50. The figure also shows the installation position of the sensor 60 on the pile body of the steel pipe pile 50.

[0051] In this embodiment, further, the pre-installation of the auxiliary device at the pre-installation position on the pile body includes: pre-installing the auxiliary device at the pre-installation position on the pile body through the screw holes at its four corners, and simultaneously calibrating the levelness of the base and the verticality of the pile axis. The auxiliary device includes: an adjustable positioning base, which comprises an arc-shaped base body (the arc can be adjusted to adapt to different pile diameters within a range of 120°-180° via an adjustable slider), symmetrically distributed screw holes with anti-loosening washers at the four corners, and a laser positioning module integrated at the top, ensuring that the verticality error between the base and the pile axis is ≤0.3°. Preferably, the auxiliary device adopts a cubic frame structure made of materials such as steel pipes, within which workers can stand, install, and perform other operations.

[0052] Furthermore, in this embodiment, the installation of the sensor 60 in a preset position on the pile body based on the auxiliary device includes: after the auxiliary device is fixed, fixing the sensor 60 to the pile body, making a positioning mark, removing the sensor 60, and marking the positioning mark on the sensor 60. The positioning mark facilitates the diver's subsequent underwater operations in locating the installation position of the sensor 60.

[0053] Specifically, 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 60 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, the bottom of the waterproof groove is provided with a drainage hole (diameter 3mm), and the groove wall is provided with a guide boss (height 2mm). When the sensor is embedded, it slides in along the guide boss to ensure consistent installation posture; the edge of the waterproof groove opening is provided with an arc chamfer (radius 5mm) to avoid scratches to divers during operation.

[0054] Furthermore, the aforementioned use of auxiliary positioning tape to mark the positioning mark includes: after the positioning mark is completed, using quick-drying waterproof adhesive to attach the auxiliary positioning tape to the horizontal surface at the location of the positioning mark, so that divers can locate the installation position of the sensor 60 underwater by touch. 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 adhesive"; and / or, the auxiliary positioning tape has equally spaced tactile protrusions to form a touch recognition mark. The aforementioned quick-drying waterproof adhesive is suitable for underwater environments and can meet the need for rapid adhesion; it facilitates the subsequent installation of the sensor 60 and saves time.

[0055] In this embodiment, the process of driving the pile to the preset elevation includes: correcting any deviation exceeding 3‰ during pile driving; pausing pile driving when it reaches a position 2-3 m from the elevation while simultaneously checking the pile's verticality; and dynamically adjusting the pause depth using a "geology-pile diameter" linkage formula: a pause depth of 3 m is set when the pile diameter is ≥2.5 m or the geology is moderately weathered rock; and a pause depth of 2 m is set when the pile diameter is <2.5 m and the geology is silty clay. The elevation position described above is only one example; adjustments can be made based on actual conditions during specific operations.

[0056] In this embodiment, installing the sensor 60 at the aforementioned installation position includes: after locating the installation position, first embedding the water-swellable waterproof sealing ring (expansion ratio 150%) into the sealing groove of the installation slot; then pressing the sensor 60 into the sealing groove along the guide boss; rotating the quick-release buckle on the side of the sensor 60 (rotation angle 90°) to engage the buckle with the sealing groove wall, completing the initial fixation; wherein, the quick-release buckle is provided with anti-slip texture, allowing divers to operate while wearing gloves. More preferably, the installation slot and the installation position of the sensor 60 are matched to facilitate better installation of the sensor 60.

[0057] To further secure the installation of the sensor 60, this embodiment uses the mounting groove and the buckle on the mounting groove to initially fix the sensor 60. The mounting groove has a barbed structure, and the maximum release force after the buckle engages is ≥300N. The bottom of the mounting groove has a positioning pin hole, and the sensor 60 has a corresponding positioning pin (8mm in diameter). When the sensor 60 is pressed into the mounting groove, the positioning pin is inserted into the pin hole to achieve radial positioning and prevent the sensor 60 from shifting due to pile driving vibration.

[0058] Furthermore, the sensor 60 is secondary-fastened to the preset position on the pile body using stainless steel mounting screws, while a water-swellable waterproof sealing ring is embedded in the gap between the mounting groove and the sensor 60. The mounting screws are corrosion-resistant quick-tight screws with hexagonal anti-slip grooves on the head and a polytetrafluoroethylene coating on the shank (with a seawater corrosion resistance of ≥5 years). 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 over-tightening and damage to the mounting groove.

[0059] Finally, after the pile driving is completed, the divers first remove the mounting screws of the sensor 60, then loosen the clips on the mounting slot until the sensor 60 is removed. The sensor is then cleaned, its performance tested, and retrieved. At this point, the installation of the sensor 60 used for underwater pile foundation work is complete, and relevant measurement data has been collected.

[0060] This embodiment provides further explanation using specific application examples:

[0061] For example, in the XXX project, the foundation piles of the underwater high-strain four-pile jacket are 78m long, 3.3m in diameter, and 38~60mm thick. The top elevation of the pile is -43.00m, the mud surface elevation is -49.69m, and the sensor 60 is installed 4m below the top of the pile. Divers need to dive about 44m, and about 47m during dismantling.

[0062] After drilling holes and installing auxiliary devices and positioning belts on the pile-carrying vessel, the piles were driven to a distance of 3 meters from the elevation and then the hammer was stopped. At this point, the diver, carrying an underwater high-strain sensor 60, began underwater operations. The total time from the diver's entry into the water to the completion of sensor 60 installation was 18 minutes, and the time to surface was 25 minutes, for a total underwater operation time of 43 minutes. For specific testing details, please refer to... Figures 3-6 As shown.

[0063] in, Figure 3 The force curve is obtained by fitting the measured force curve with the force curve calculated by the CAPWAPC method;

[0064] Force Mcd --- Measured force, referring to the curve of the measured force, with the unit being kilonewtons (kN).

[0065] Force Cpt --- Calculated force, referring to the force curve obtained by fitting the CAPWAPC method, with units of kilonewtons (kN).

[0066] L / c --- Measurement duration, in milliseconds (ms). Where: L is the pile length, in meters (m), and c is the stress wave velocity, in meters per second (m / s).

[0067] in, Figure 4 This is a measured force versus velocity curve. Velocity Mcd refers to the measured stress wave velocity, measured in meters per second (m / s).

[0068] Pile – a model of a pile;

[0069] in, Figure 5 Loading diagram of forces calculated by the CAPWAPC method;

[0070] Load --- The applied force, measured in kilonewtons (kN).

[0071] Displacement --- The displacement of the pile, in millimeters (mm).

[0072] The ultimate bearing capacity of a single pile obtained by the Ru---CAPWAPC method is expressed in kilonewtons (kN).

[0073] Rs---Pile side frictional resistance obtained by CAPWAPC method analysis, in kilonewtons (kN).

[0074] Rb---The soil resistance at the pile tip obtained by the CAPWAPC method, in kilonewtons (kN).

[0075] in, Figure 6 This is a diagram showing the distribution of pile side friction.

[0076] Shaft Resistance Distribution – A diagram showing the distribution of skin friction on the pile side, in kilonewtons per meter (kN / m).

[0077] Pile Force at Ru --- Pile axial force curve, unit is kilonewton (kN).

[0078] This application pre-determines the installation position of the sensor at a predetermined location on the pile before pile driving. Once the pile reaches the predetermined elevation, divers can quickly locate the sensor's installation position with the aid of an auxiliary positioning belt, completing the sensor installation and removal within a short time. This reduces underwater operation time by approximately 5-10 minutes, shortening it to 15-20 minutes. It effectively avoids technical problems such as limited underwater visibility, long diving time, and high risks. In summary, this application has broad market application prospects.

[0079] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0080] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0081] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0082] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. The preferred embodiments have been described in detail. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the claims of this application.

Claims

1. A method for installing an underwater high-strain detection sensor for offshore wind power steel pipe piles, characterized in that, include: The auxiliary device is pre-installed at the pre-installation position on the pile body; The sensor is installed at a preset position on the pile body using an auxiliary device; Remove the sensor and mark its location; Use an auxiliary positioning tape to mark the positioning mark; Drive the piles to the preset elevation; The probe descends to the vicinity of the positioning mark and locates the installation position of the sensor based on the auxiliary positioning strip. Install the sensor at the specified mounting location; After the pile driving is completed, the sensor will be removed.

2. The installation method of the 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 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 simultaneously calibrating the levelness of the base and the verticality of the pile body axis.

3. The installation method of the underwater high-strain detection sensor for offshore wind power steel pipe piles according to claim 1, characterized in that, The above-mentioned installation of the sensor in a preset position on 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 marking the sensor with a positioning mark.

4. The installation method of the 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 mounting 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 in along the guide boss to ensure consistent installation posture. The edge of the groove opening is provided with an arc chamfer.

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

6. The installation method of the underwater high-strain detection sensor for offshore wind power steel pipe piles according to claim 1, characterized in that, During the aforementioned pile driving to the preset elevation, the following procedures are followed: if the verticality exceeds 3‰ during the pile driving process, correction shall be carried out; when the pile is driven to a position 2-3 m away from the elevation, pile driving shall be suspended and the verticality of the pile body shall be checked simultaneously. The pile driving pause depth is dynamically adjusted through the "geology-pile diameter" linkage formula: when the pile diameter is ≥2.5m or the geology is moderately weathered rock layer, the pause depth is set to 3m; When the pile diameter is less than 2.5m and the geological conditions are silty clay, the pause depth is set to 2m.

7. The installation method of the underwater high-strain detection sensor for offshore wind power steel pipe piles according to claim 1, characterized in that, The above-mentioned installation of 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 to make the buckle engage with the groove of the sealing groove wall to complete the initial fixation; wherein, the quick-release buckle is provided with anti-slip texture, and divers can operate it while wearing gloves.

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

9. The installation method of the underwater high-strain detection sensor for offshore wind power steel pipe piles according to claim 7 or 8, characterized in that, The sensor is then fastened to the preset position on the pile body using stainless steel mounting screws. At the same time, a water-swellable waterproof sealing ring is embedded in the gap between the mounting groove and the sensor. The mounting screws are corrosion-resistant quick-tight screws with hexagonal anti-slip grooves on the head and polytetrafluoroethylene coating on the shank surface. The mounting screws are installed using a diagonal tightening method, with the tightening torque controlled between 15-20 N•m to ensure sealing performance while preventing over-tightening of the mounting screws and damage to the mounting groove.

10. The installation method of the underwater high-strain detection sensor for offshore wind power steel pipe piles according to claim 9, characterized in that, After the pile driving is completed, the divers first remove the mounting screws of the sensor, then loosen the clips on the mounting slot until the sensor is removed. After cleaning and testing the performance of the sensor, it is then retrieved.

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