A monitoring process for offshore wind suction caisson foundation grouting system

Abstract

The present application relates to a kind of offshore wind power suction type guide pipe frame foundation grouting system monitoring process in the technical field of guide pipe frame monitoring process, through the simulation experiment of laboratory and using sensor etc., realize the field simulation of grouting construction, when simulating grouting, the self-compacting, self-leveling characteristics, scour characteristics etc. of grouting material are simulated monitoring, then again finite element simulation is carried out to simulation data, so that the characteristics of grouting material are mastered and adjusted, to improve the work efficiency of offshore wind power construction personnel and safety monitoring personnel, fill the suction type guide pipe frame foundation grouting technology blank, realize the effective monitoring of suction type guide pipe frame foundation grouting quality.

Description

Technical Field

[0001] The present invention relates to the technical field of jacket monitoring technology, and in particular to a monitoring technology for a foundation grouting system of an offshore wind power suction jacket. Background Art

[0002] Currently, as offshore wind turbine suction jacket foundation construction in my country is still in its initial stages of trial implementation, there is still a lack of monitoring technology for suction jacket foundation grouting systems. With the subsequent demand for the construction of a large number of suction jacket foundations, it is urgent and necessary to research and fill this gap in monitoring technology for suction jacket foundation grouting systems. To this end, we provide a monitoring process for offshore wind turbine suction jacket foundation grouting systems to address the above issues. Summary of the Invention

[0003] The object of the present invention is to provide a monitoring process for an offshore wind power suction jacket foundation grouting system to solve the above technical problems.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a monitoring process for an offshore wind power suction jacket foundation grouting system, the monitoring process comprising the following steps:

[0005] S1: Build a scaled plexiglass model of the jacket and simulate the grouting process;

[0006] S2: Observe the self-compacting and self-leveling properties of underwater grouting materials;

[0007] S3: Observe the scouring characteristics of underwater grouting materials on sediment;

[0008] S4: Observe the water dispersion resistance of the jacket grouting material;

[0009] S5: Conduct simulated sampling test on overflow materials filled with overflow slurry underwater;

[0010] S6: testing the sample taken out in step S5 to test its hardening characteristics.

[0011] Preferably, the step S2 is specifically as follows:

[0012] Observe the organic glass scale model manually and with a camera. If the grouting material is observed to self-level from one side of the grouting port to the other side, the grouting material has self-leveling properties.

[0013] When the grouting material is full, it can be observed through the glass. If there are no pores in the grouting material, it has the characteristics of self-compacting.

[0014] Preferably, the observation of the self-compacting of the underwater grouting material in step S2 further includes the following steps: underwater ultrasonic detection using the principle of vertical reflection of stress waves.

[0015] Preferably, the step S3 specifically comprises: during the production process of the organic glass scale model, attaching a sensor to the surface of the organic glass scale model in contact with the grouting slurry, and recording physical quantities such as strain stress, bending moment, torque, acceleration, displacement, etc. measured by the sensor.

[0016] Preferably, the sensor is composed of an elastic element and a resistive strain sensitive element, and the resistive strain sensitive element is adhered to the elastic element.

[0017] Preferably, step S4 specifically comprises: observing the organic glass scale model manually and with a camera device, and observing that during the grouting process, the grouting material first displaces the seawater in the organic glass scale model through the overflow port; if the displaced seawater is clear and not turbid, it indicates that the grouting material has good anti-water dispersion performance.

[0018] Preferably, step S5 is specifically as follows: when the organic glass scale model is observed to be filled with overflowing grout, a sampling tube is manually connected to the overflow port, the other end of the sampling tube is connected to a suction pump, the valve in the sampling tube is opened, and the overflowed grouting material is allowed to pass through the sampling tube into the sample bin, the sample bin is connected to a discharge port, the water in the bin will be gradually replaced by the grouting material, and when the discharge port begins to evenly overflow the grouting material, the discharge tube valve is closed, and then the valve in the sampling tube is closed; the sampling tube is disassembled from the overflow pipe of the organic glass scale model, the storage barrel cover is opened, and the taken grouting material is poured out for relevant experimental testing.

[0019] Preferably, the step S6 specifically includes: detecting and recording the compressive strength parameters of the taken samples at 1d / 3d / 7d / 28d.

[0020] Compared with the existing technology, the beneficial effects of the present invention are: the present invention realizes on-site simulation of grouting construction through laboratory simulation experiments and the use of monitoring technologies such as sensors. During the simulated grouting, the self-compacting, self-leveling, and scouring properties of the grouting material are simulated and monitored, and then finite element simulation is performed on the simulation data to master and adjust the properties of the grouting material, thereby improving the work efficiency of offshore wind power construction personnel and safety monitoring personnel, filling the gap in suction jacket foundation grouting technology, and realizing effective monitoring of the suction jacket foundation grouting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 Schematic diagram of the monitoring process of the present invention. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0024] See also Figure 1 The present invention provides a technical solution: a monitoring process for an offshore wind power suction jacket foundation grouting system, the monitoring process comprising the following steps:

[0025] S1: Build a scaled plexiglass model of the jacket and simulate the grouting process;

[0026] S2: Observe the self-compacting and self-leveling properties of underwater grouting materials;

[0027] S3: Observe the scouring characteristics of underwater grouting materials on sediment;

[0028] S4: Observe the water dispersion resistance of the jacket grouting material;

[0029] S5: Conduct simulated sampling test on overflow materials filled with overflow slurry underwater;

[0030] S6: testing the sample taken out in step S5 to test its hardening characteristics.

[0031] Specifically, step S2 is as follows:

[0032] Observe the organic glass scale model manually and with a camera. If the grouting material is observed to self-level from one side of the grouting port to the other side, the grouting material has self-leveling properties.

[0033] When the grouting material is full, it can be observed through the glass. If there are no pores in the grouting material, it has the characteristics of self-compacting.

[0034] Specifically, the observation of the self-compacting of the underwater grouting material in step S2 also includes the following steps: underwater ultrasonic detection is used based on the principle of vertical reflection of stress waves. During the detection, the surface of the organic glass scale model generates multi-order harmonic signals under the action of impact. A part of the stress wave diffuses and propagates along the surface of the model, and another part of the energy penetrates the model and propagates toward the grouting material. At the interface between the model and the grouting material, or the interface between the model and the water, the stress wave will generate multiple reflected waves of different intensities. The mutual superposition of the multiple reflected waves changes the vibration energy of the particles. Therefore, the difference in the wave energy reflects the structural difference of the suction cylinder and whether there are defects such as non-compactness.

[0035] Specifically, step S3 is as follows: during the production process of the organic glass scale model, a sensor is attached to the surface of the organic glass scale model that contacts the grouting slurry, and the physical quantities such as strain stress, bending moment, torque, acceleration, and displacement measured by the sensor are recorded. When the measured physical quantity acts on the elastic element, the deformation of the elastic element causes the resistance value of the sensitive element to change, which is converted into an electrical output by the conversion circuit. The magnitude of the electrical change reflects the magnitude of the measured physical quantity. The strain sensor can measure physical quantities such as strain stress, bending moment, torque, acceleration, and displacement, and after the grouting body hardens, the data tested by the sensor can also reflect the state between the hardened slurry and the steel pipe. Finally, the finite element software is used to numerically simulate the scouring characteristics of the sediment in the suction pile foundation barrel, so that requirements for the grouting material density and grouting speed can be put forward according to the working conditions of the sediment in different foundation barrels.

[0036] Specifically, the sensor is composed of an elastic element and a resistance strain sensitive element, and the resistance strain sensitive element is pasted on the elastic element.

[0037] Specifically, step S4 is as follows: manually and with a camera to observe the organic glass scale model. During the grouting process, the grouting material first displaces the seawater in the organic glass scale model through the overflow port. If the displaced seawater is clear and not turbid, it indicates that the grouting material has good anti-water dispersion performance. At the same time, the movement process of the grouting material in the suction cylinder can be intuitively displayed, and the lifting and drainage process of the grouting material can be simulated, thereby verifying the feasibility of large-scale and long-term underwater grouting construction.

[0038] Specifically, step S5 is as follows: when it is observed that the organic glass scale model is filled with overflowing grout, a sampling tube is manually connected to the overflow port, the other end of the sampling tube is connected to a suction pump, the valve in the sampling tube is opened, and the overflowed grouting material passes through the sampling tube into the sample bin, the sample bin is connected to a discharge port, the water in the bin will be gradually replaced by the grouting material, and when the discharge port begins to evenly overflow the grouting material, the discharge tube valve is closed, and then the valve in the sampling tube is closed; the sampling tube is disassembled from the overflow pipe of the organic glass scale model, the storage barrel cover is opened, and the taken grouting material is poured out for relevant experimental testing.

[0039] Specifically, step S6 is as follows: detecting and recording the compressive strength parameters of the taken samples at 1d / 3d / 7d / 28d, and then using finite element software to numerically simulate the effect of grouting material hardening on the bearing capacity of the suction pile foundation, thereby putting forward requirements for the strength of the grouting material.

[0040] Example 1:

[0041] S1: Build a scaled plexiglass model of the jacket and simulate the grouting process;

[0042] S2: Observing the self-compacting and self-leveling properties of the underwater grouting material. Step S2 specifically comprises: observing the organic glass scale model manually and with a camera device. If the grouting material is observed to self-level from one side of the grouting port to the other side, the grouting material has self-leveling properties.

[0043] Through the glass, it can be observed that the grouting material is full. If there are no pores in the grouting material, it has the characteristics of self-compacting. At the same time, underwater ultrasonic testing is used based on the vertical reflection principle of stress waves. During the test, the surface of the organic glass scale model generates multi-order harmonic signals under the action of impact. Part of the stress wave diffuses and propagates along the surface of the model, and the other part of the energy penetrates the model and propagates to the grouting material. At the interface between the model and the grouting material, or the interface between the model and the water, the stress wave will generate multiple reflected waves of different intensities. The mutual superposition of multiple reflected waves changes the vibration energy of the particles. Therefore, the difference in wave energy reflects the structural difference of the suction cylinder and whether there are defects such as non-compactness.

[0044] S3: Observe the scouring characteristics of underwater grouting materials on sediment; during the production of the organic glass scale model, a sensor is attached to the surface of the organic glass scale model in contact with the grouting slurry, and the strain stress, bending moment, torque, acceleration, displacement and other physical quantities measured by the sensor are recorded. When the measured physical quantity acts on the elastic element, the deformation of the elastic element causes the resistance value of the sensitive element to change, which is converted into an electrical output through the conversion circuit. The magnitude of the electrical change reflects the magnitude of the measured physical quantity. Strain sensors can measure physical quantities such as strain stress, bending moment, torque, acceleration, displacement, and after the grouting body hardens, the sensor test data can also reflect the state between the hardened slurry and the steel pipe. Finally, finite element software is used to numerically simulate the scouring characteristics of sediment in the suction pile foundation barrel, so that requirements for grouting material density and grouting speed can be put forward according to the working conditions of sediment in different foundation barrels. The sensor is composed of an elastic element and a resistive strain sensitive element, and the resistive strain sensitive element is attached to the elastic element.

[0045] S4: Observe the water-dispersion resistance of the jacket grouting material. Specifically, observe the organic glass scale model manually and with a camera. During the grouting process, the grouting material first displaces the seawater in the organic glass scale model through the overflow port. If the displaced seawater is clear and not turbid, it indicates that the grouting material has good water-dispersion resistance. The movement of the grouting material in the suction cylinder can also be visually demonstrated. The lifting and drainage process of the grouting material is simulated to verify the feasibility of large-scale, long-term underwater grouting construction.

[0046] S5: Conduct a simulated sampling test on the overflow material filled with grout underwater. Specifically, S5 is as follows: after observing that the organic glass scale model is filled with overflowing grout, manually connect a sampling tube to the overflow port, connect the other end of the sampling tube to the suction pump, open the valve in the sampling tube, and let the overflowed grouting material enter the sample bin through the sampling tube. The sample bin is connected to a discharge port, and the water in the bin will be gradually replaced by the grouting material. When the discharge port begins to evenly overflow the grouting material, close the discharge tube valve, and then close the valve in the sampling tube; disassemble the sampling tube from the overflow tube of the organic glass scale model, open the storage barrel cover, and pour out the taken grouting material for relevant experimental tests;

[0047] S6: Test the samples taken out in step S5 to test their hardening characteristics. Specifically, S6 includes: testing and recording the compressive strength parameters of the taken out samples at 1d / 3d / 7d / 28d, and then using finite element software to numerically simulate the effect of grouting material hardening on the bearing capacity of the suction pile foundation, thereby putting forward requirements for the strength of the grouting material.

[0048] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0049] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A monitoring process for an offshore wind power suction jacket foundation grouting system, characterized by: The monitoring process includes the following steps: S1: Build a scaled plexiglass model of the jacket and simulate the grouting process; S2: Observe the self-compacting and self-leveling properties of underwater grouting materials; S3: Observing the scouring characteristics of the underwater grouting material on the sediment. The specific steps of step S3 are: During the production of the organic glass scale model, a sensor is attached to the surface of the organic glass scale model that contacts the grouting material slurry, and the strain stress, bending moment, torque, acceleration, and displacement measured by the sensor are recorded. The sensor is composed of an elastic element and a resistive strain sensitive element, and the resistive strain sensitive element is attached to the elastic element. S4: Observe the water dispersion resistance of the jacket grouting material; S5: Conduct simulated sampling test on overflow materials filled with overflow slurry underwater; S6: testing the sample taken out in step S5 to test its hardening characteristics.

2. The monitoring process for an offshore wind power suction jacket foundation grouting system according to claim 1, characterized in that: The step S2 is specifically as follows: Observe the organic glass scale model manually and with a camera. If the grouting material is observed to self-level from one side of the grouting port to the other side, the grouting material has self-leveling properties. When the grouting material is full, it can be observed through the glass. If there are no pores in the grouting material, it has the characteristics of self-compacting.

3. The monitoring process for an offshore wind power suction jacket foundation grouting system according to claim 2, characterized in that: The observation of the self-compacting of the underwater grouting material in step S2 further includes the following steps: underwater ultrasonic detection is performed using the vertical reflection principle of stress waves.

4. The monitoring process for an offshore wind power suction jacket foundation grouting system according to claim 1, characterized in that: The step S4 specifically includes: observing the organic glass scale model manually and with a camera device, and observing that during the grouting process, the grouting material first displaces the seawater in the organic glass scale model through the overflow port. If the displaced seawater is clear and not turbid, it indicates that the grouting material has good anti-water dispersion performance.

5. The monitoring process for offshore wind power suction jacket foundation grouting system according to claim 1, characterized in that: The step S5 is specifically as follows: when the organic glass scale model is observed to be filled with overflowing grout, a sampling tube is manually connected to the overflow port, the other end of the sampling tube is connected to a suction pump, the valve in the sampling tube is opened, and the overflowed grouting material enters the sample bin through the sampling tube. The sample bin is connected to a discharge port, and the water in the bin will be gradually replaced by the grouting material. When the discharge port begins to evenly overflow the grouting material, the discharge tube valve is closed, and then the valve in the sampling tube is closed; the sampling tube is disassembled from the overflow pipe of the organic glass scale model, the storage barrel cover is opened, and the taken grouting material is poured out for relevant experimental testing.

6. The monitoring process for offshore wind power suction jacket foundation grouting system according to claim 1, characterized in that: The step S6 specifically includes: detecting and recording the compressive strength parameters of the taken samples at 1d / 3d / 7d / 28d.

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