Intelligent sensing type geodraining board structure and monitoring system thereof

Abstract

The application belongs to the field of geotechnical engineering monitoring, and discloses an intelligent sensing type geotechnic drainage plate structure and a monitoring system thereof, which comprises a drainage plate core, a high-permeability filter membrane, a flexible film sensor, a positioning sensor and a multifunctional hand joint. The high-permeability filter membrane is fixed on the surface of the drainage plate core; the flexible film sensor and the positioning sensor are combined and fixed on the surface of the high-permeability filter membrane; the multifunctional hand joint comprises a low-power battery module, a sensing signal acquisition device, a positioning data acquisition device and a wireless data transmission device; the multifunctional hand joint is installed on the drainage plate with the sensor system to form the intelligent sensing type geotechnic drainage plate structure, which can be arranged horizontally and vertically, and can monitor the shape and spatial position of the drainage plate. The application has the advantages of high monitoring data accuracy, low manufacturing cost, simple structure and fast layout.

Description

Technical Field

[0001] This invention belongs to, but is not limited to, the field of geotechnical engineering monitoring technology, and particularly relates to an intelligent sensing geotechnical drainage board structure and its monitoring system. Background Technology

[0002] Vacuum preloading is widely used in silt reinforcement treatment due to its advantages such as convenient construction and large treatment area. Conventional vacuum preloading uses plastic drainage boards to treat silt with high water content. Traditional plastic drainage boards come in various shapes such as corrugated and harmonica-shaped. The core is an extruded plastic board, which serves as the skeleton and channel of the drainage strip. Its cross-section is in the shape of a parallel cross, and both sides are wrapped with non-woven geotextile as a filter layer. The core strip provides support and drains the water that seeps into the filter layer upwards. It is an excellent channel for soft soil treatment using drainage consolidation methods for saturated cohesive soils such as silt, silty soil, and fill, which greatly shortens the consolidation time of soft soil. In the early stage of vacuum preloading, the silt will undergo large deformation and dehydration consolidation. If vertical plastic drainage boards are used, it is difficult to determine the depth of the drainage boards driven into the ground, and the drainage boards will bend during the consolidation process. If horizontal plastic drainage boards are used, the silt will undergo non-linear large deformation consolidation around the horizontal drainage boards, and the horizontal plastic drainage boards will also be misaligned during on-site installation.

[0003] Based on the above analysis, the urgent technical problems that need to be solved in the existing technology are:

[0004] Currently, there is no solution that can accurately monitor the shape and spatial position of plastic drainage boards. Traditional plastic drainage boards also lack sensing capabilities. Therefore, it is necessary to design an intelligent sensing geogrid drainage board structure and its monitoring system to solve the above problems. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides an intelligent sensing geotextile drainage board structure and its monitoring system.

[0006] The present invention is implemented as follows: an intelligent sensing geotextile drainage board structure and its monitoring system, characterized in that the intelligent sensing geotextile drainage board structure and its monitoring system include: a drainage board core, a high-permeability filter membrane, a flexible thin-film sensor, a positioning sensor, and a multi-functional hand-shaped connector.

[0007] Furthermore, the high-permeability filter membrane is integrally made of high-permeability resin material, completely wrapping the outside of the drainage board core and able to fit the movement of the drainage board without affecting the drainage channel of the drainage board core. Its strength is sufficient to withstand the combined encapsulation of the flexible thin-film sensor and the positioning sensor.

[0008] Furthermore, the flexible thin-film sensor, having the same characteristics as the high-permeability thin-film material, can be encapsulated on the surface of the high-permeability thin-film. The flexible thin-film sensor initially remains parallel to the core of the drainage board. After being encapsulated in the high-permeability thin-film, it can conform to the movement of the drainage board core and complete the signal acquisition of the drainage board's shape change through a multi-functional hand-shaped connector.

[0009] Furthermore, the positioning sensors are encapsulated at equal intervals on the surface of the high-permeability filter membrane, and the positioning sensors are interconnected and complete the signal acquisition of the spatial position of the drainage board through a multi-functional hand-shaped connector.

[0010] Furthermore, the multifunctional hand-shaped connector includes a main hand-shaped connector structure and a multifunctional sensing module. The main hand-shaped connector structure includes a square interface connecting to the core of the drainage board and a tubular component connected to the square interface. The multifunctional sensing structure is encapsulated inside the square interface and includes a sensor signal acquisition device, a low-power battery module, a positioning signal acquisition device, and a wireless signal transmission device. The sensor signal acquisition device is arranged perpendicular to the direction of the flexible thin-film sensor and can collect morphological data of multiple flexible thin-film sensors on the same plane. The low-power battery module is connected to the positioning signal acquisition device and the wireless signal transmission device for power supply. The positioning signal acquisition device is connected to the positioning sensor and is used to track and identify the position and number of each positioning sensor. The wireless signal transmission device transmits the morphological monitoring data acquired by the sensor signal acquisition device and the positioning monitoring data acquired by the positioning signal acquisition device to a cloud server for analysis.

[0011] Another objective of this invention is to provide a method for using an intelligent sensing geodrainage board structure and its monitoring system, comprising:

[0012] First, a high-permeability filter membrane is installed on the outside of the drainage board core. Then, flexible thin-film sensors are encapsulated on the surface of the high-permeability filter membrane at certain intervals. At the same time, positioning sensors are encapsulated at designated positions on the high-permeability filter membrane at equal intervals. Then, a multi-functional hand-shaped connector is installed on one side of the drainage board core. The morphological data of the flexible thin-film sensor and the positioning signal monitoring data are collected through the sensing module inside the multi-functional hand-shaped connector to realize the collection and analysis of drainage board morphology and spatial position information.

[0013] Based on the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solution to be protected by this invention are as follows:

[0014] First, the intelligent sensing geotextile drainage board structure and its monitoring system provided by this invention, through the design and combination of a high-permeability filter membrane encapsulating a flexible thin-film sensor and a positioning sensor with the drainage board core, adds a multi-functional sensor network without affecting the drainage function of the drainage board. The data acquisition and transmission module is integrated inside the multi-functional hand-shaped connector, which not only provides a data acquisition path for the flexible thin-film sensor but also allows for stable multi-node connection with the positioning sensor. The low-power battery module and wireless signal transmission device solve the problems of difficult wiring and easy cable damage and leakage in the drainage board's operating environment. Furthermore, this structure is applicable to both vertical and horizontal drainage boards, improving the convenience and practicality of the drainage board morphology and spatial position information monitoring system in actual monitoring, and possesses excellent prospects for widespread application. Second, the multi-functional hand-shaped connector in this invention can be combined with drainage board cores of various models. Only the flexible thin-film sensor and positioning sensor encapsulation needs to be completed according to the reference steps, minimizing the impact of non-coupling between the sensor and the drainage board core morphology changes, greatly improving the sensitivity and accuracy of the monitoring system. Through the above methods, an intelligent sensing geotextile drainage board structure and its monitoring system are provided, which are simple in structure, easy and quick to deploy, highly sensitive, and have good prospects for widespread application.

[0015] Secondly, the "intelligent sensing geotextile drainage board structure and its monitoring system" involved in this invention possesses technical advantages such as structural optimization, intelligent monitoring and control, and can be widely applied in infrastructure projects such as soft soil treatment, foundation reinforcement, dam reinforcement, port construction, and road construction. Compared with traditional drainage boards, this invention can sense the operating status of the drainage board system in real time, reduce construction costs, and improve the controllability and reliability of foundation reinforcement effects. With the continuous growth in demand from urban infrastructure construction, coastal development, and transportation and water conservancy projects, this product has broad market prospects. Its promotion and application can not only bring direct economic benefits to construction units, but also drive the development of upstream and downstream industries such as related materials, equipment manufacturing, and engineering services, and has a good industrial driving effect. In addition, the intelligent features of this technology are in line with the development trend of digital engineering and green construction, helping the industry to transform and upgrade towards efficiency, intelligence, and environmental protection, and has important social value and strategic significance.

[0016] Currently, there is no mature technology capable of accurately monitoring the morphology and spatial position of plastic drainage boards. Existing traditional plastic drainage boards generally lack sensing capabilities, failing to meet the real-time perception and refined control requirements for drainage status, deformation behavior, and construction effects during soft soil foundation treatment. This leads to reliance on experience-based judgment during construction, a lack of process data support, and problems such as uneven treatment effects and uncontrollable construction, severely hindering the intelligent and efficient development of foundation treatment processes such as vacuum preloading. This invention is innovative and practical in its structural integration method, information acquisition mechanism, and system collaborative control, filling the current technological gap in the field of intelligent drainage geosynthetics both domestically and internationally.

[0017] This invention addresses a key technical challenge that has long been a focus of industry attention but has remained largely unresolved, offering a groundbreaking solution. Traditional plastic drainage boards lack deformation monitoring, location tracking, and status feedback capabilities during soft soil foundation treatment, severely limiting the accuracy and controllability of the process. While the engineering community has long desired real-time monitoring and intelligent management of drainage board operation, this goal has remained unfulfilled due to limitations in sensor integration, material compatibility, and the complexity of on-site conditions. This invention successfully overcomes this bottleneck by innovatively integrating an intelligent sensing system deeply into the drainage board structure. It not only senses the deformation and spatial position changes of the drainage board in complex soil in real time but also monitors its operational status, enabling dynamic control of the entire foundation treatment process. This fills a technological gap in the field and has significant engineering implications and broad market application prospects. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the use of the intelligent sensing geotextile drainage board structure and its monitoring system provided in this embodiment of the invention.

[0019] Figure 2 This is a schematic diagram of the intelligent sensing geotextile drainage board structure provided in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the high-permeability filter membrane, flexible thin-film sensor, positioning sensor and drainage board core assembly provided in the embodiments of the present invention;

[0021] Figure 4 This is a schematic diagram of another angle of the structural combination of the high-permeability filter membrane, flexible thin-film sensor, positioning sensor and drainage board core provided in the embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the multifunctional hand-type connector provided in an embodiment of the present invention;

[0023] Figure 6These are data effect diagrams of thin-film sensors under different stresses provided in the embodiments of the present invention;

[0024] Figure 7 These are effect diagrams of thin-film sensor data at different locations provided in embodiments of the present invention.

[0025] In the diagram: 0. Intelligent sensing geogrid drainage board; 1. Drainage board core; 2. High-permeability filter membrane; 3. Flexible thin-film sensor; 4. Positioning sensor; 5. Multifunctional hand-shaped connector; 6. Sensor signal acquisition device; 7. Positioning signal acquisition device; 8. Wireless signal transmission device; 9. Low-power battery module; 10. Cloud transmission server; 11. Remote data analysis system; 12. Foundation soil environment. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] like Figures 1 to 5 As shown, this embodiment of the invention provides an intelligent sensing geotextile drainage board structure and its monitoring system, including: drainage board core 1, high permeability filter membrane 2, flexible thin film sensor 3, positioning sensor 4, and multifunctional hand-type connector 5.

[0028] The intelligent sensing geotextile drainage board structure includes a drainage board core, a high-permeability filter membrane, a flexible thin-film sensor, a positioning sensor, and a multi-functional hand-shaped connector.

[0029] The high-permeability filter membrane is made of a single piece of high-permeability resin material, which can completely wrap around the outside of the drainage board core and fit the drainage board in motion. After the high-permeability filter membrane is installed, it does not affect the drainage channel of the drainage board core. The high-permeability filter membrane can withstand the combined encapsulation of flexible thin film sensors and positioning sensors.

[0030] The flexible thin-film sensor, with properties consistent with the high-permeability thin-film material, is encapsulated on the surface of the high-permeability thin-film. The flexible thin-film sensor initially remains parallel to the core of the drainage board. After being encapsulated in the high-permeability thin-film, the flexible thin-film sensor can move in conjunction with the core of the drainage board and complete the signal acquisition of the shape change of the drainage board through the multi-functional hand-shaped connector.

[0031] The positioning sensors are encapsulated at equal intervals on the surface of a high-permeability filter membrane. The positioning sensors are interconnected and complete the signal acquisition of the spatial position of the drainage board through a multi-functional hand-shaped connector.

[0032] The multifunctional hand-shaped connector includes a main hand-shaped connector structure and a multifunctional sensing module. The main hand-shaped connector structure includes a square interface connecting to the core of the drainage board and a tubular component connected to the square interface. The multifunctional sensing structure is encapsulated inside the square interface and includes a sensor signal acquisition device 6, a low-power battery module 9, a positioning signal acquisition device 7, and a wireless signal transmission device 8. The sensor signal acquisition device is arranged perpendicular to the direction of the flexible thin-film sensor and can acquire morphological data of multiple flexible thin-film sensors on the same plane. The low-power battery module is connected to the positioning signal acquisition device and the wireless signal transmission device through the sensor signal acquisition device for power supply. The positioning signal acquisition device is connected to the positioning sensor and is used to track and identify the position and number of each positioning sensor. The wireless signal transmission device transmits the morphological monitoring data acquired by the sensor signal acquisition device and the positioning monitoring data acquired by the positioning signal acquisition device to a cloud server for analysis.

[0033] The intelligent sensing geodrainage board, constructed according to the above structure, is placed inside the foundation soil that needs to be treated. Once it enters the working state, the sensors in the intelligent sensing geodrainage board will collect and transmit real-time monitoring data on the shape and location of the drainage board, thereby enabling real-time monitoring of the shape and spatial location information of the drainage board.

[0034] In other embodiments, to achieve greater monitoring of the drainage board network, horizontal and vertical drainage boards are installed in some foundation treatments. The installation is carried out in accordance with the steps described above, and the data of multiple smart sensor-type geogrid drainage boards are collected and analyzed simultaneously to improve efficiency and obtain more accurate and comprehensive drainage board status and spatial data.

[0035] The intelligent sensing geotextile drainage board structure and its monitoring system provided in this embodiment of the invention are used as follows:

[0036] First, a high-permeability filter membrane is installed on the outside of the drainage board core. Then, flexible thin-film sensors are encapsulated on the surface of the high-permeability filter membrane at certain intervals, and positioning sensors are encapsulated at designated positions on the high-permeability filter membrane at equal intervals. Next, a multi-functional hand-shaped connector is installed on one side of the drainage board core. The morphological data of the flexible thin-film sensors and the positioning signal monitoring data are collected through the sensing module inside the multi-functional hand-shaped connector. The sensing signal acquisition device, the positioning signal acquisition device, and the wireless information transmission device are all powered by low-power battery modules. The collected data is uploaded to the cloud server in real time through the wireless information transmission device, and then handed over to the remote data analysis system for further analysis of the drainage board's morphology and spatial position information.

[0037] The system is based on a drainage board core 1, which has a traditional drainage function. A highly permeable filter membrane 2 is tightly wrapped around the surface of the drainage board core, without affecting its drainage channels, while providing load-bearing and protection. A flexible thin-film sensor 3 is embedded longitudinally along the middle of the filter membrane, arranged parallel to the drainage board axis, to sense the deformation, bending, or stress state of the drainage board; positioning sensors 4 are embedded at equal intervals on both sides of the filter membrane surface, tracking the spatial posture of the board by changes in their spacing.

[0038] The multi-functional hand-shaped connector 5 is located at one end of the drainage board and serves as a centralized encapsulation part for the sensing module. Its square interface tightly connects to the core of the drainage board, ensuring stable signal transmission; its tubular component facilitates wiring and signal output. This connector integrates a sensing signal acquisition device 6, a positioning signal acquisition device 7, a wireless signal transmission device 8, and a low-power battery module 9, forming an integrated intelligent monitoring unit to ensure synchronous signal transmission and long-term system operation.

[0039] A flexible thin-film sensor is encapsulated on the surface of a filter membrane, maintaining close contact with the core of the drainage board. During bending or compression of the drainage board, the sensor itself deforms. This deformation is converted into an electrical signal, reflecting in real time the force or displacement of the drainage board within the foundation. The sensor signal acquisition device is perpendicular to the arrangement direction of the flexible thin-film sensor, ensuring the simultaneous acquisition of data from multiple sensors and achieving area array sensing.

[0040] Positioning sensors are arranged longitudinally along the drainage board according to their serial numbers, and their position encoding and identification functions are realized through connection with the positioning signal acquisition device. When the foundation settles or the board moves, the changes in the spacing between the positioning sensors can be collected and identified, thereby deducing the trajectory of the board in space and helping to judge the soil stress migration or structural stability.

[0041] All sensor data (including flexible shape data and positioning data) are packaged together via wireless signal transmission device 8 and uploaded to cloud transmission server 10 in real time. With the help of remote data analysis system 11, engineers can remotely view, analyze and evaluate the health status of the foundation environment and drainage board structure from any location, realizing unattended continuous monitoring.

[0042] The entire system is embedded in the foundation soil environment 12 and is deployed in a standard modular manner during construction to ensure deployment efficiency and sensing effect. The high permeability membrane has good ductility and adapts well to the shape of the drainage board, ensuring synchronous response between the sensor and the structure. It can adapt to complex working conditions such as uneven settlement and compaction deformation of the foundation, and improve the informatization level and intelligent management capability of foundation engineering.

[0043] Figure 6The effective voltage response of the sensor in the displacement direction is shown under different applied pressures (50 kPa, 100 kPa, 150 kPa). The overall trend indicates that the effective voltage increases significantly with increasing pressure, demonstrating the device's excellent pressure response sensitivity. Particularly at 150 kPa, the peak response in the sensor's central region exceeds 6 mV, indicating the strongest strain-charge coupling capability in this region. The response curve in the displacement direction exhibits an approximately bell-shaped distribution, reflecting a stress concentration effect in the sensing layer, which highly matches the deformation distribution of the actual loaded area.

[0044] As the measured displacement increases, the output voltage exhibits a significant attenuation characteristic, and the attenuation rate accelerates with increasing pressure. This trend indicates that the effective area expands and the electrical signal spatially diffuses during the stress propagation from the loading center to the edge. Due to the microscopic interface capacitance changes or piezoresistive modulation effects in the sensing layer structure, this nonlinear attenuation phenomenon can also be regarded as a spatial degradation curve of the piezoresistive response under multi-physical coupling, providing an experimental basis for subsequent optimization of the sensor array layout.

[0045] Figure 7 Normalized response curves of five different sensors under the same loading conditions were plotted. The overall trend was consistent downward, but the response decay rates differed. Sensors 1 to 5 were arranged sequentially from the center to the edge. The differences in the distribution of their response values ​​along the displacement direction reflect potential thickness fluctuations or inconsistent interface bonding during device fabrication. Although the initial normalized values ​​of each device were close to 1.0, the difference at the very end was close to 0.1, indicating a certain degree of sensitivity degradation in the edge region. This requires optimization of the sensing film deposition uniformity and substrate coupling process to improve consistency.

[0046] Figure 7 The stable relative differences between the response curves indicate that sensors at different locations still possess good response resolution under the same load. This characteristic can be used to construct a two-dimensional displacement-pressure sensing matrix based on an array design, thereby realizing stress gradient reconstruction and spatial distribution calculation. It is particularly suitable for spatial pressure field identification needs in scenarios such as flexible tactile electronic skin, intelligent prosthetic feedback systems, and structural health monitoring.

[0047] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A smart sensing geotextile drainage board, characterized in that, It includes a drainage board core, a high-permeability filter membrane, a flexible membrane sensor, a positioning sensor, and a multi-functional hand-shaped connector; the high-permeability filter membrane completely covers the outside of the drainage board core and is in close contact with the drainage board core; the flexible membrane sensor is set on the outer surface of the high-permeability filter membrane along the axial direction of the drainage board core; the positioning sensor is parallel to the flexible membrane sensor and set on the outer surface of the high-permeability filter membrane at a set interval; The multi-functional hand-shaped connector connects to one end of the drainage board core and encapsulates a sensor signal acquisition device, a positioning signal acquisition device, a wireless signal transmission device, and a low-power battery module. The flexible thin-film sensor and the highly permeable filter membrane are made of the same highly permeable resin material to maintain synergistic deformation; The multi-functional hand-type connector includes a square interface connected to the core of the drainage board, a tubular component connected to the square interface, and a sensor signal acquisition device, a positioning signal acquisition device, a wireless signal transmission device, and a low-power battery module encapsulated inside the square interface. The sensor signal acquisition device corresponds to the flexible thin-film sensor and can simultaneously acquire morphological data from multiple flexible thin-film sensors in the same plane. The low-power battery module supplies power to the sensor signal acquisition device, the positioning signal acquisition device, and the wireless signal transmission device. The positioning signal acquisition device is used to track and identify the location numbers of the positioning sensors as positioning monitoring data. The wireless signal transmission device is used to transmit morphological data and positioning monitoring data. The low-power battery module is a flexible thin-film battery and is self-charged through an energy recovery circuit. The positioning sensor is electrically connected to the positioning signal acquisition device inside the multi-functional hand-shaped connector via a serial communication line and is identified by a unique number. The sensor signal acquisition device is arranged laterally relative to the longitudinal direction of the flexible thin film sensor to achieve multi-channel synchronous acquisition; The flexible film sensor has the same characteristics as the high-permeability film material and is encapsulated on the surface of the high-permeability film. The flexible film sensor is initially parallel to the core of the drainage board. After being encapsulated in the high-permeability film, it can move in accordance with the core of the drainage board and complete the signal acquisition of the shape change of the drainage board through the multi-functional hand-shaped connector. The positioning sensors are encapsulated on the surface of a high-permeability filter membrane at equal intervals and sequentially numbered. The positioning sensors are interconnected and complete the signal acquisition of drainage board positioning monitoring data through a multi-functional hand-shaped connector.

2. An intelligent monitoring system, characterized in that, It includes the intelligent sensing geogrid drainage board as described in claim 1, as well as a cloud server and a remote data analysis terminal; the sensing signal acquisition device and the positioning signal acquisition device respectively acquire the morphological data and positioning monitoring data of the flexible thin film sensor; The wireless communication module uploads morphological data and location numbers to the cloud server; the remote data analysis terminal obtains and processes morphological data and location information from the cloud server.

3. The intelligent monitoring system as described in claim 2, characterized in that, The signal acquisition module includes an analog front-end, an analog-to-digital conversion unit, and a counting and recognition unit.

4. A foundation monitoring method, characterized in that, The following steps are performed using the intelligent monitoring system according to claim 2: Assemble intelligent sensing geogrid drainage boards and bury them in the foundation soil; The signal acquisition module is activated to collect morphological data and location information in real time. The morphological data and location information are uploaded to the cloud server via a wireless communication module. The morphological data and location information are fused and processed at a remote data analysis terminal to obtain the deformation curve and spatial attitude of the drainage board. Assess foundation stability based on analysis results.

5. The foundation monitoring method as described in claim 4, characterized in that, The remote data analysis terminal sets a threshold and generates an alarm message and pushes it to the mobile terminal when the change in the drainage board shape data exceeds the threshold.

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