A device and method for measuring the three-dimensional shape of an erosion pit of a single pile structure

Abstract

The present invention provides a device and method for measuring the three-dimensional shape of an erosion pit of a single pile structure. The measuring device includes a plurality of loop arms, which are connected to a crossbeam; the opening and closing angles of two adjacent loop arms can be adjusted to accommodate single piles of different sizes, and the loop arms form a semi-enclosure or full enclosure of the single pile; a plurality of probe rods are provided on the crossbeam, and the plurality of probe rods are arranged in sequence along the extension direction of the crossbeam, and a dynamometer is provided at the lower end of the probe rod, and the lower end of the probe rod moves up and down relative to the crossbeam. When the probe rod of the present invention descends and touches the bottom of the erosion pit, the probe rod is automatically reset through the numerical feedback of the dynamometer, and then the crossbeam automatically rotates to the next measurement position, which can speed up the measurement process while maintaining high measurement accuracy; the present invention uses the position information of the probe rod, combined with the probe rod descent distance measured each time, to automatically draw the three-dimensional shape of the erosion pit by a computer program, and the measurement process is simple and easy to operate, and the final result is concise and easy to understand.

Description

Technical Field

[0001] The present invention relates to a device and method for measuring the shape of erosion pits around hydraulic structures caused by hydraulic action, and more specifically to a device and method for measuring the three-dimensional shape of erosion pits of a single pile structure, which is suitable for offshore engineering structures such as single pile foundations of wind turbines built in water, highway and railway bridge piers, and offshore platform supports. Background Art

[0002] The monopile structure located near the sea or in rivers and lakes is affected by waves, tides and water flow. The sand and soil around the monopile structure will be washed away by the water flow, forming erosion pits with a certain depth and shape around the monopile structure. Depending on the size of the monopile structure, the Froude coefficient of the fluid, the shear stress generated by the water and the properties of the soil, the depth of the erosion pit can sometimes be several times the diameter of the monopile structure, which greatly reduces the bearing capacity of the monopile structure and is very likely to cause engineering accidents.

[0003] The different hydraulic effects, material properties and environments make the erosion pits irregular in shape, making them difficult to measure in actual projects. In order to accurately determine the impact of erosion pits on the bearing capacity of single pile structures, the morphology of erosion pits should be mapped as accurately as possible. Summary of the invention

[0004] The first object of the present invention is to provide a device for measuring the three-dimensional shape of erosion pits of a single pile structure to address the deficiencies in the prior art, so as to measure the three-dimensional shape of erosion pits around the single pile structure.

[0005] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0006] A device for measuring the three-dimensional shape of an erosion pit of a single pile structure, characterized in that: the device for measuring the three-dimensional shape of an erosion pit of a single pile structure comprises a plurality of loop arms, wherein the loop arms are connected to a crossbeam;

[0007] The opening and closing angles of two adjacent ring arms can be adjusted to accommodate single piles of different sizes, and the ring arms form a semi-enclosure or full enclosure of the single pile;

[0008] A plurality of probe rods are arranged on the crossbeam, and the plurality of probe rods are arranged in sequence along the extension direction of the crossbeam. A dynamometer is provided at the lower end of the probe rod, and the lower end of the probe rod moves up and down relative to the crossbeam.

[0009] While adopting the above technical solutions, the present invention may also adopt or combine the following technical solutions:

[0010] As a preferred technical solution of the present invention: a ring arm opening and closing adjustment device is provided at the connection between two adjacent ring arms, and the ring arm opening and closing adjustment device is used to adjust the opening and closing angle of the ring arm to clamp the single pile.

[0011] As a preferred technical solution of the present invention: a wheel-shaped driving mechanism is provided on the side of the ring arm facing the single pile, and the wheel-shaped driving mechanism includes a roller and a roller driving motor, and the roller driving motor drives the roller to drive the ring arm to move up and down or rotate left and right along the single pile.

[0012] As a preferred technical solution of the present invention: the wheel-shaped driving mechanism has a built-in displacement meter, and the displacement meter is used to measure the up and down displacement change or the left and right rotation angle change of the ring arm.

[0013] As a preferred technical solution of the present invention: a plurality of cylindrical channels are arranged on the crossbeam along the extension direction of the crossbeam, and the probe rod passes through the cylindrical channels.

[0014] As a preferred technical solution of the present invention: a probe rod driving wheel and a probe rod guide wheel are arranged in the cylindrical channel, the probe rod driving wheel and the probe rod guide wheel are arranged relatively to form a clamp for the probe rod body, and the probe rod driving wheel is used to drive the probe rod to move up and down.

[0015] As a preferred technical solution of the present invention: the driving wheel of the probe rod has a built-in displacement meter, and the displacement meter is used to measure the up and down displacement change of the probe rod.

[0016] Another object of the present invention is to provide a method for measuring the three-dimensional shape of an erosion pit of a single pile structure in view of the deficiencies in the prior art.

[0017] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0018] A method for measuring the three-dimensional shape of an erosion pit of a single pile structure, characterized in that: the method for measuring the three-dimensional shape of an erosion pit of a single pile structure is based on the above-mentioned device for measuring the three-dimensional shape of an erosion pit of a single pile structure, and comprises the following steps:

[0019] S1. Adjust the opening and closing angles of the ring arm so that the ring arm can fit and clamp the outer wall of the single pile structure to be measured;

[0020] S2, moving the measuring device of the three-dimensional shape of the erosion pit of the single pile structure as a whole down along the single pile to close to the foundation surface;

[0021] S3, move the probe rod downward until the pressure measured by the dynamometer at the bottom of the probe rod reaches a certain threshold, and then return the probe rod to its initial position. During this process, record the distance the probe rod moves downward;

[0022] S4, the circle arm rotates a certain angle, and repeats step S3;

[0023] S5, repeat step S4 until the ring arm drives the beam to rotate 360 ​​degrees and return to the initial measurement position;

[0024] S6. Based on the coordinate positions of each probe rod in the horizontal plane during the measurement process and the recorded downward movement distance of the probe rod, the three-dimensional shape of the erosion pit around the single pile is drawn.

[0025] The present invention provides a device and method for measuring the three-dimensional shape of a single pile structure erosion pit, which has the following beneficial effects compared with the prior art:

[0026] 1) The present invention arranges multiple sections of ring arms, and the opening and closing angles between adjacent ring arms can be adjusted, so as to be convenient for adapting to single pile structures of different sizes. In particular, a ring arm opening and closing adjustment device can be provided at the connection between two adjacent sections of ring arms to control the opening angle of the two sections of ring arms, thereby expanding the application range of the whole device;

[0027] 2) When the probe rod of the present invention descends and touches the bottom of the erosion pit, the probe rod is automatically reset through the numerical feedback of the dynamometer, and then the crossbeam automatically rotates to the next measurement position. This process has a high degree of automation and can speed up the measurement process while maintaining high measurement accuracy;

[0028] 3) The present invention uses the position information of the probe rod and the probe rod descent distance measured each time to automatically draw the three-dimensional shape of the erosion pit by a computer program. The measurement process is simple and easy to operate, and the final result is concise and easy to understand. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A front view of a device for measuring the three-dimensional shape of a single pile structure erosion pit provided by the present invention;

[0030] Figure 2 A top view of the device for measuring the three-dimensional shape of a single pile structure erosion pit provided by the present invention;

[0031] Figure 3 This is a diagram showing the connection between the probe rod and the crossbeam;

[0032] In the figure: 1-single pile; 2-ring arm; 3-ring arm opening and closing adjustment device; 4-crossbeam; 5-wheel-shaped driving mechanism; 6-probe rod; 7-probe rod driving wheel; 8-probe rod guide wheel; 9-dynamometer; 10-displacement meter. DETAILED DESCRIPTION

[0033] The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1-3 As shown, a device for measuring the three-dimensional shape of an erosion pit of a single pile structure includes a ring arm 2, a ring arm opening and closing adjustment device 3, a crossbeam 4, a wheel-shaped driving mechanism 5, a probe rod 6, a probe rod driving wheel 7, a probe rod guide wheel 8 and a dynamometer 9.

[0035] A wheel-shaped driving mechanism 5 is installed at the portion where the ring arm 2 fits the single pile 1. The wheel-shaped driving mechanism 5 includes a roller and a roller driving motor. The roller driving motor drives the roller to drive the ring arm 2 to move up and down along the single pile 1 or rotate in a horizontal plane, and the displacement meter built into the wheel-shaped driving mechanism 5 records the movement distance and rotation angle of the ring arm.

[0036] In this embodiment, the loop arm 2 is divided into two sections, and the opening angle between the loop arms 2 at both ends is controlled by the loop arm opening and closing adjustment device 3 to clamp the single pile 1.

[0037] The ring arm 2 is connected to a crossbeam 4, on which a plurality of cylindrical holes are distributed for the probe rod 6 to pass through; a probe rod driving wheel 7 and a probe rod guide wheel 8 are installed in the cylindrical hole on the crossbeam 4, which can drive the probe rod 6 to rise and fall, and a built-in displacement meter 10 records the rising and falling distance of the probe rod 6; a dynamometer 9 is installed at the lower part of the probe rod 6, which can record the value of the force when the probe rod 6 contacts the ground and generates a force.

[0038] Components such as dynamometers, displacement meters, wheel-shaped drive mechanisms, and probe drive wheels can all be connected to computers via wires and remotely controlled by programs.

[0039] Specifically, the above-mentioned device for measuring the three-dimensional shape of the erosion pit of the single pile structure performs three-dimensional shape drawing by the following method:

[0040] S1. Adjust the opening and closing angle of the ring arm through the ring arm opening and closing adjustment device so that the ring arm can fit and clamp the outer wall of the single pile structure to be measured;

[0041] S2. The measuring device for the three-dimensional shape of the erosion pit of the single pile structure is moved down along the single pile to a position close to the foundation surface (the mud surface on the seabed) by means of a wheel-shaped driving mechanism, and the dynamometer and displacement meter are reset to zero at the same time;

[0042] S3, the probe rod driving wheel drives the probe rod to move down until the pressure measured by the dynamometer at the bottom of the probe rod reaches a certain threshold value, which is 10 N in this embodiment, and the probe rod driving wheel stops moving down the probe rod and starts to raise the probe rod until the probe rod returns to the initial position. During this process, the maximum descending distance of the probe rod is measured by the displacement meter, which is the depth of the erosion pit at the position of the probe rod; wait until all the probe rods return to their initial positions, and then end this measurement;

[0043] S4, driving the ring arm to rotate a certain angle through the wheel-shaped driving mechanism, which is 30 degrees in this embodiment, and repeating step S3;

[0044] S5, repeat step S4 until the ring arm drives the crossbeam to rotate 360 ​​degrees, that is, the ring arm drives the probe rod on the crossbeam to rotate successively until it returns to the initial measurement position;

[0045] S6. The program in the computer will automatically collect the position data of all probe measurements and the erosion depth measured by the probe each time; based on these data, the computer program draws the three-dimensional shape of the erosion pit around the single pile; at this time, the three-dimensional shape of the erosion pit around a single pile structure is drawn.

[0046] The above-mentioned specific implementation methods are used to explain the present invention and are only preferred embodiments of the present invention, rather than limiting the present invention. Any modifications, equivalent substitutions, improvements, etc. made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A device for measuring the three-dimensional shape of a single pile structure erosion pit, characterized in that: The device for measuring the three-dimensional shape of the erosion pit of the single pile structure comprises a multi-section ring arm, and the ring arm is connected to the crossbeam; The opening and closing angles of two adjacent ring arms can be adjusted to accommodate single piles of different sizes, and the ring arms form a semi-enclosure or full enclosure of the single pile; The crossbeam is provided with a plurality of probe rods, which are arranged in sequence along the extension direction of the crossbeam, and a dynamometer is provided at the lower end of the probe rod, and the lower end of the probe rod moves up and down relative to the crossbeam; A wheel-shaped driving mechanism is provided on the side of the ring arm facing the single pile, and the wheel-shaped driving mechanism includes a roller and a roller driving motor, and the roller driving motor drives the roller to drive the ring arm to move up and down along the single pile and rotate left and right; The wheel-shaped driving mechanism has a built-in displacement meter, which is used to measure the displacement change of the ring arm moving up and down or the change of the left and right rotation angle; A plurality of cylindrical holes are arranged on the crossbeam along the extension direction of the crossbeam, and the probe rod passes through the cylindrical holes; A probe rod driving wheel and a probe rod guide wheel are arranged in the cylindrical hole, the probe rod driving wheel and the probe rod guide wheel are arranged relative to each other to clamp the probe rod body, and the probe rod driving wheel is used to drive the probe rod to move up and down; The driving wheel of the probe rod has a built-in displacement meter, which is used to measure the up and down displacement changes of the probe rod; a circle arm opening and closing adjustment device is provided at the connection between two adjacent circle arms, and the circle arm opening and closing adjustment device is used to adjust the opening and closing angle of the circle arm to clamp the single pile.

2. A method for measuring the three-dimensional shape of a single pile structure erosion pit, characterized in that: The method for measuring the three-dimensional morphology of the erosion pit of the single pile structure is based on the device for measuring the three-dimensional morphology of the erosion pit of the single pile structure according to claim 1, and comprises the following steps: S1. Adjust the opening and closing angles of the ring arm so that the ring arm can fit and clamp the outer wall of the single pile structure to be measured; S2, moving the measuring device of the three-dimensional shape of the erosion pit of the single pile structure along the single pile down to close to the foundation surface; S3, move the probe rod downward until the pressure measured by the dynamometer at the bottom of the probe rod reaches a certain threshold, and then return the probe rod to its initial position. During this process, record the distance the probe rod moves downward; S4, the circle arm rotates a certain angle, and repeats step S3; S5, repeat step S4 until the ring arm drives the beam to rotate 360 ​​degrees and return to the initial measurement position; S6. Based on the coordinate positions of each probe rod in the horizontal plane during the measurement process and the recorded downward movement distance of the probe rod, the three-dimensional shape of the erosion pit around the single pile is drawn.

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