Detachable bionic fish scale bucket wall type intelligent monitoring suction foundation

Abstract

The invention provides a detachable bionic fish scale bucket wall type intelligent monitoring suction foundation. Compared with a traditional suction foundation, the split type barrel-shaped support is installed on the outer wall of the foundation, the bionic fish scale units embedded with the strain sensors are pasted on the outer wall of the barrel-shaped support, and finally the fish scale units and the barrel-shaped support are stacked and arranged on the outer wall of the foundation in a streamline shape similar to fish scales. The selection range of the length L of a single scale of the bionic fish scale unit is 0.1-0.2 times of the basic height, and the selection range of the width W of the scale is (0.3-0.5) L. In the foundation penetration stage, the fish scale units can guide soil to flow directionally, and friction resistance is reduced; when the foundation is subjected to upward pulling or lateral load, the moving direction of soil particles is opposite to the inclination angle of the scale units, the particles are embedded into scale gaps to form mechanical interlocking, and the bearing capacity is improved. Meanwhile, the strain sensors embedded in the fish scale units can monitor stress distribution of a foundation-soil body contact interface in real time, and potential structure failure risks can be early warned in real time. Therefore, the three functions of easy insertion, stable anchoring and easy monitoring are achieved, and wide application prospects are achieved in the field of infrastructure in ocean energy exploitation.

Description

Technical Field

[0001] The invention relates to the technical field of offshore foundation engineering equipment, and in particular to a detachable bionic fish scale barrel wall type intelligent monitoring suction foundation. Background Art

[0002] As an efficient offshore engineering foundation, suction foundations achieve rapid installation through the principle of negative pressure adsorption and are widely used in offshore wind power, floating platform anchoring and other fields. However, traditional suction foundations currently have defects in their application. The life cycle of a suction foundation includes three stages: penetration, service and recovery. When a traditional barrel foundation is penetrated into the seabed, the friction resistance between its smooth outer wall and the soil is large, resulting in the need for high-power hydraulic equipment to be used during the installation process, which significantly increases construction costs. In addition, when the foundation sinks, the soil flows into the barrel to form a "soil plug". Excessive accumulation height will hinder the generation of negative pressure and even lead to insufficient penetration depth. Existing technical research solutions alleviate the soil plug problem by processing the barrel wall, but the processing is complicated and may lead to a decrease in the structural strength of the barrel wall. In addition, during the service life, the existing suction foundation stress monitoring mostly relies on external sensors or later drilling and burying equipment, which has three major limitations: first, the sensors are susceptible to seawater corrosion or mechanical damage and have a short lifespan; second, it is impossible to obtain stress distribution data at the foundation-soil contact interface in real time, resulting in delayed operation and maintenance decisions; third, the current monitoring of suction foundations mostly relies on regular manual inspections, such as divers or ROVs, resulting in high monitoring costs and long cycles. Although some studies have tried to embed sensors inside the barrel wall, the packaging process is complex and difficult to replace and maintain.

[0003] In response to the above problems, the present invention proposes a suction foundation that deeply integrates detachable bionic fish scale units with intelligent monitoring technology. By installing a prefabricated fish scale unit with an embedded strain sensor on the surface of the barrel wall, the inclination of the scales guides the sand particles to flow in a directional manner along the diversion groove during the penetration stage, reducing the direct friction between the particles and the barrel wall. During the service stage, when the foundation is under load, the fish scale reverse groove enhances the pull-out bearing capacity through the interlocking effect of soil particles, achieving the dual functions of "easy insertion and stable anchoring". At the same time, the built-in stress sensor of the fish scale unit can monitor the stress distribution of the foundation-soil contact interface in real time, and provide dynamic data on the stress state of the foundation. When a large deformation change occurs in the fish scale unit during service, the strain sensor will respond and warn of potential structural failure risks. Summary of the invention

[0004] In order to solve the above technical problems, the present invention aims to provide a detachable bionic fish scale barrel wall suction foundation applicable to offshore wind power, floating platform anchoring and other fields. While reducing the penetration resistance and improving the pull-out bearing capacity, the bionic fish scale unit can obtain the foundation stress state in real time through the built-in stress monitoring device of the fish scale unit, judge the service state of the foundation structure, and give early warning of structural failure, thus realizing the function of intelligent monitoring.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A detachable bionic fish scale barrel wall suction foundation comprises a drainage hole, a foundation top plate, a foundation side wall, a split barrel bracket, a fish scale unit, and a strain sensor. The split barrel bracket is fixed to the foundation side wall, and the fish scale unit is connected to an interface of the split barrel bracket.

[0007] Furthermore, the split barrel-shaped bracket is a semi-barrel-shaped steel structure, and the design size should correspond to the foundation size to ensure that it can be firmly wrapped around the foundation side wall. The barrel body of the split barrel-shaped bracket is designed as a roughened interface for pasting the fish scale unit.

[0008] Furthermore, the design concept of the fish scale unit is based on a streamlined stacked arrangement that imitates fish scales, wherein a single fish scale is arranged downward along the tip of the triangle, thereby guiding the directional flow of soil during the foundation penetration stage and reducing frictional resistance.

[0009] Furthermore, during the service life of the foundation, when the foundation is subjected to uplift or lateral loads, the movement direction of the soil particles is opposite to the inclination angle of the fish scale unit, and the particles are embedded in the gaps between the scales to form mechanical interlocking, thereby improving the pull-out bearing capacity.

[0010] Furthermore, the fish scale unit is made of carbon fiber reinforced polymer, which has the advantages of light weight, corrosion resistance, designable stiffness, moderate deformation, etc. When casting the fish scale unit, the strain sensor is embedded in the mold in advance and the scale unit is implanted, which can effectively avoid corrosion from seawater.

[0011] Furthermore, the fish scale unit has the characteristic of moderate deformation, and the strain sensor will deform along with the force on the fish scale unit, so it can monitor the force on the infrastructure. When the fish scale unit undergoes a large deformation change during service, the strain sensor will issue an early warning so that engineering personnel can carry out targeted maintenance, thus realizing the function of intelligently monitoring the service status of the infrastructure.

[0012] Furthermore, the size of the suction foundation, the length (L) and the width (W) of the bionic fish scale unit are designed according to the actual requirements such as the load combination of the foundation and the properties of the seabed soil. The fish scale arrangement method and size determination method of a detachable bionic fish scale barrel wall suction foundation are as follows:

[0013] Furthermore, the thickness D of the foundation top plate is selected in the range of 50 to 100 mm, the thickness t of the foundation side wall is selected in the range of 10 to 50 mm, and the foundation height H is selected in the range of 2 to 8 m.

[0014] Furthermore, the scale length L of the fish scale unit is in the range of (0.1-0.2)H, the scale width W is in the range of (0.3-0.5)L, the scale thickness T is in the range of 5-20mm, and the scale bending radius R is in the range of 10-30°.

[0015] Furthermore, the fish scale units can be arranged on the foundation side walls in two ways: full fish scale unit arrangement and partial fish scale unit arrangement. The specific arrangement is determined during the design process based on soil parameters of the actual project. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the layout of all fish scale units on a detachable bionic fish scale barrel wall suction foundation.

[0017] Figure 2 A schematic diagram of the side details of a detachable bionic fish scale barrel wall suction.

[0018] Figure 3 This is a schematic diagram of the inside of the split barrel bracket with the fish scale unit installed.

[0019] Figure 4 Schematic diagram of a fish scale unit with built-in strain sensor.

[0020] Figure numerals: 1. drainage hole; 2. foundation top plate; 3. foundation side wall; 4. split barrel bracket; 5. fish scale unit; 6. strain sensor. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings.

[0022] A removable bionic fish scale barrel wall suction foundation, referring to Figure 1 and Figure 2 , a drainage hole 1, a foundation top plate 2 and a foundation side wall 3 are provided. The foundation side wall 3 is provided with a split barrel-shaped bracket 4. A detachable fish scale unit 5 is installed on the annular barrel bracket 4. The fish scale unit 5 is embedded with a strain sensor 6.

[0023] Reference Figure 1 and 2 The drainage hole 1 is located at a position deviated from the center of the foundation top cover 2, the thickness D of the foundation top plate is selected in the range of 50 to 100 mm, the thickness t of the foundation side wall is selected in the range of 10 to 50 mm, and the foundation height H is selected in the range of 2 to 8 m;.

[0024] Reference Figure 1 and 2 The design concept of the fish scale unit is based on the streamlined stacking arrangement that imitates fish scales, in which a single fish scale is arranged downward along the tip of the triangle, thus having a directional advantage. During the foundation penetration stage, the soil is guided to flow in a directional manner to reduce friction resistance. During the service life of the foundation, when the foundation is subjected to uplift or lateral loads, the movement direction of the soil particles is opposite to the inclination angle of the fish scale unit, and the particles are embedded in the gaps between the scales to form a mechanical interlock, thereby improving the pull-out bearing capacity.

[0025] Reference Figure 3 During foundation processing, the materials of the foundation top plate 2, foundation side wall 3 and annular barrel frame 4 are mainly steel. First, the size of the suction foundation is designed according to the construction geological profile, and then the annular barrel frame 4 of the corresponding size is manufactured and installed. Then, the scale unit 5 is cast with carbon fiber reinforced polymer, and the strain sensor 6 is embedded in it before the scale unit 5 solidifies. Finally, it is pasted on the annular barrel frame 4 in a streamlined stacking arrangement order to complete the production of the detachable bionic fish scale barrel wall suction foundation.

[0026] Reference Figure 4 Since the fish scale unit 5 has the characteristic of moderate deformation, the strain sensor will deform along with the force on the fish scale unit. When the fish scale unit 5 has a large deformation change, the strain sensor 6 will issue an early warning to the engineering personnel so that they can carry out maintenance.

[0027] Reference Figure 4 The selection range of the fish scale unit scale length L is (0.1~0.2)H, the selection range of the scale width W is (0.3~0.5)L, the selection range of the scale thickness T is 5~20mm, and the selection range of the scale bending arc W is 10~30°.

[0028] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A detachable bionic fish scale barrel wall type intelligent monitoring suction foundation, characterized by: The suction foundation is a circular barrel structure with a closed top and an open bottom, comprising a drainage hole (1), a foundation top cover (2) and a foundation side wall (3); the foundation side wall is provided with a split barrel bracket (4) and a fish scale unit (5); and a strain sensor (6) is embedded in the fish scale unit.

2. A detachable bionic fish scale barrel wall type intelligent monitoring suction foundation according to claim 1, characterized in that: The middle drainage hole (1) is located at a position deviating from the center of the top cover (2), the thickness D of the foundation top plate (2) is selected in the range of 50 to 100 mm, the thickness t of the foundation side wall (3) is selected in the range of 10 to 50 mm, the foundation height H is selected in the range of 2 to 8 m, and the suction foundation material is mainly steel.

3. According to the detachable bionic fish scale barrel wall type intelligent monitoring suction foundation of claim 1, it is characterized by: The split barrel-shaped bracket (4) is a semi-barrel-shaped structure made of steel. When installed, two split barrel-shaped brackets (4) are wrapped around the base side wall (3) and butt-jointed for assembly. The barrel body is designed with a roughened interface to facilitate the attachment of the fish scale unit (5). The design size of the split barrel-shaped bracket (4) should correspond to the base size to ensure that it can be firmly fixed to the base side wall (3).

4. A detachable bionic fish scale barrel wall type intelligent monitoring suction foundation according to claim 1, characterized in that: The fish scale unit (5) uses the streamlined stacking arrangement of fish scales. During the penetration stage, the scale inclination angle guides the sand particles to flow in the diversion groove direction, thereby reducing resistance. During the service stage, the fish scale reverse grooves enhance the pull-out bearing capacity through the interlocking effect of soil particles.

5. According to the detachable bionic fish scale barrel wall type intelligent monitoring suction foundation of claim 1, it is characterized by: The fish scale unit (5) is made of carbon fiber reinforced polymer, which has the advantages of being lightweight, corrosion-resistant, designable stiffness, and moderate deformation.

6. According to the detachable bionic fish scale barrel wall type intelligent monitoring suction foundation of claim 1, it is characterized by: Before the fish scale unit (5) is prepared, the strain sensor (6) is embedded in the mold in advance, and the scale unit (5) is implanted, which can effectively avoid corrosion from seawater. The material of the fish scale unit (5) has the characteristic of variability, and the strain sensor (6) will deform along with the force applied to the fish scale unit (5). When the fish scale unit (5) undergoes a large deformation change during service, the strain sensor (6) will issue an early warning, thereby realizing intelligent monitoring of the service status of the infrastructure.

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