CN114635435A - Early warning support method for flexible net packaged slope - Google Patents
Early warning support method for flexible net packaged slope Download PDFInfo
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- CN114635435A CN114635435A CN202210236306.1A CN202210236306A CN114635435A CN 114635435 A CN114635435 A CN 114635435A CN 202210236306 A CN202210236306 A CN 202210236306A CN 114635435 A CN114635435 A CN 114635435A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/202—Securing of slopes or inclines with flexible securing means
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0051—Including fibers
- E02D2300/0053—Including fibers made from glass
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/20—Arrangements in telecontrol or telemetry systems using a distributed architecture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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- Health & Medical Sciences (AREA)
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- Soil Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
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Abstract
The invention relates to a flexible net packaged slope early warning support method, which adopts a double-layer flexible net structure under the common constraint of a stress conversion device and a high-strength glass fiber cable to couple a probe type capacitance sensor and a local self-built network in a support system for wireless data transmission so as to realize the stable support of a 10-40 cm-thick planting soil cushion layer under any slope condition and dynamically monitor and early warn the stability of a landslide in real time by utilizing the relation between the stability of the slope and the water content. According to the method for early warning and supporting the slope packaged by the flexible net, when the soil body of the slope generates lateral displacement, the probe-type capacitance sensing stress conversion soil nails generate tensile force to resist the sliding of the slope, and the flexible surface layer consisting of the first-layer grating, the soil bearing plate and the second-layer grating can resist partial pressure between the adjacent probe-type capacitance sensing stress conversion soil nails and transmit the partial pressure to the slope body embedded by the probe-type capacitance sensing stress conversion soil nails.
Description
Technical Field
The invention relates to a flexible net packaged slope early warning support method applied to municipal engineering roadbed and slope protection, and belongs to the technical field of environmental engineering.
Background
With the rapid development of economy in China, the requirements on the protection work of various municipal roadbeds, mountain slopes and other environmental projects are higher and higher. Because the geological conditions of vast country members and different regions are complex and various, the phenomena of mountain and soil body collapse and landslide are frequent and serious in harm, and the landslide is a restriction factor which seriously influences the national economic development and personal safety.
The existing slope protection engineering still has the traditional protection measures all the time, and the problem of large consumption of building materials such as sand, stone, cement and the like exists in the construction process, so that the ecological damage phenomenon is serious, and the damaged ecological system can be recovered usually in a long time. The applicable slope angle range of the current ecological slope support is limited, effective support is difficult to form for steep slopes with high risk, and danger is easy to occur under extremely severe weather conditions, so that great property loss is caused. Meanwhile, collapse and landslide are often closely related to the water content of the side slope soil body, so how to properly solve the environmental problems generated in the side slope support and achieve the purpose of 'green and sustainable' from construction to support is more and more emphasized by various related departments.
In view of this, the present patent application is specifically proposed.
Disclosure of Invention
The application provides a flexible net packaged slope early warning support method, which aims to solve the problems in the prior art, and adopts a double-layer flexible net structure under the common constraint of a stress conversion device and a high-strength glass fiber cable so as to couple a probe type capacitance sensor and a local self-constructed network in a support system for wireless data transmission, so that the dynamic monitoring and real-time early warning on the landslide stability can be realized by utilizing the relation between the slope stability and the water content for the stable support of a 10-40 cm-layer thick planting soil cushion layer under any slope condition.
In order to achieve the design purpose, the flexible net packaging slope early warning support method comprises the steps that a plurality of groups of probe type capacitance sensing stress conversion soil nails are inserted into a first layer of grid, one group or a plurality of groups of glass fiber cables with high strength are connected among the probe type capacitance sensing stress conversion soil nails to form a flexible grid connection structure, and a slope surface is restrained after the first layer of grid is buried into a slope soil body; placing a soil bearing plate on the first layer of grid, wherein the soil bearing plate is positioned above at least two groups of probe type capacitance sensing stress conversion soil nails, and then laying a planting soil cushion layer above the soil bearing plate; covering a sublayer grid above the planting soil cushion layer, inserting a plurality of groups of probe type capacitance sensing stress conversion soil nails on the sublayer grid, and connecting one or more groups of glass fiber cables with higher strength between the probe type capacitance sensing stress conversion soil nails to form a flexible grid connection structure; the probe type capacitance sensing stress conversion soil nail is provided with a hollow soil layer connector, a glass fiber cable connector is sleeved on the soil layer connector, and a distributed wireless node, a power supply module, a needle type capacitance sensor, an oscillator, a signal source and a modulator are packaged and coupled in the soil layer connector;
when the side slope soil body generates lateral displacement, the probe type capacitance sensing stress conversion soil nail generates tensile force to resist the side slope sliding, and the flexible surface layer consisting of the first layer of grids, the soil bearing plate and the second layer of grids can resist partial pressure between the adjacent probe type capacitance sensing stress conversion soil nails and transmit the partial pressure to the slope body embedded with the probe type capacitance sensing stress conversion soil nail; the soil bearing plate is lapped on the probe type capacitance sensing stress conversion soil nail and plays a role in bearing a planting soil cushion layer on the upper part of the soil bearing plate; the gravity of the planting soil cushion layer acts on the soil bearing plate and is transmitted to the probe type capacitance sensing stress conversion soil nail by the soil bearing plate; the distributed wireless nodes in the probe type capacitance sensing stress conversion soil nail array transmit signals, the distributed wireless nodes send data to the wireless gateway through a self-built ZigBee wireless network, and the wireless gateway transmits the data to the management platform through the Internet, so that dynamic monitoring and early warning of the water content of the soil are realized.
Furthermore, soil water content data obtained by monitoring the needle type capacitive sensor in a side slope soil body is subjected to parameter modulation through the oscillator, and the influence of soil conductivity on water content detection is eliminated through frequency adjustment of the oscillator.
Further, a parameter lambda is introduced into the oscillator parameter modulation circuit, the lambda changes along with the change of the switching frequency to obtain a circuit function after the parameter is introduced, when different values are assigned to the lambda, a group of circuit function equation sets can be obtained, and the capacitance value for eliminating the conductance influence can be obtained by solving the equation sets;
in the circuit, the capacitor Cx and the resistor R are connected in parallel to replace soil; wherein R is the resistance of the soil; the resistor R is connected into a parameter modulation circuit consisting of an inductor L, a capacitor Co and an additional capacitor Ci, and the switch K is connected into the capacitor Ci according to a certain frequency.
The frequency of the change of the switch K is Ω, the transmission coefficient is:
with voltage transients:
the coefficient m is a function containing a soil resistance value R, a capacitor Co and an additional capacitor Ci, and at the moment, the soil resistance value R can be eliminated by adjusting the circuit frequency, and the equation is obtained by arranging:
in the formula, the resistance value R of the soil is eliminated, namely the influence of electric conduction is eliminated.
Further, under the action of the alternating electric field, after data processing is carried out by a signal source and a modulator which are input through electric quantity conversion measurement, signal processing and digital-to-analog conversion, the numerical value of the water content is directly output in a digital form.
To sum up, the flexible net encapsulation slope early warning support method has the following advantages:
1. the application is based on the principle of 'green environmental protection sustainability', and the stable support of a 10-40cm thick planting soil cushion layer under any gradient is realized through the probe type capacitance sensing stress conversion soil nail and the flexible net structure under the constraint of the glass fiber cable. Meanwhile, the monitoring and early warning module of the supporting system can accurately monitor the water content data of the slope soil body in real time.
2. By applying the method, when the side slope generates lateral displacement, the probe-type capacitance sensing stress conversion soil nails generate tensile force to resist the side slope sliding, the flexible surface layer resists partial soil pressure between the probe-type capacitance sensing stress conversion soil nails and transmits the soil pressure to the slope body embedded by the conversion device, and the tensile force generated by the flexible surface layer plays a role in keeping the local stability of the slope surface. The structure that plays the supporting role in this design is for holding native board, holds native board overlap joint on probe-type capacitance sensing stress conversion soil nail, plays the supporting role to its upper planting soil bed course. The gravity action of bed course is on bearing the soil board, and transmit to probe-type capacitance sensing stress conversion soil nail by bearing the soil board again, has reduced the bed course and has collapsed the destruction possibility.
3. The double-layer flexible net structure under the restraint of the probe type capacitance sensing stress conversion soil nails and the glass fiber cables realizes the stable support of the planting soil cushion layer with the thickness of 10-40cm under any gradient, solves the contradiction between the stability of the planting soil cushion layer and the requirements of ecological slope plant growth, and breaks through the limitation of small applicable slope angle range of the traditional ecological slope support technology at present.
4. This application has adopted novel environmental protection material, the use amount of concrete and steel in the work progress that has significantly reduced. Meanwhile, on the premise of ensuring the safety of the support, the economical efficiency of the support scheme is ensured by reducing the construction cost.
5. According to the landslide stability monitoring and early warning method and device, the dynamic monitoring and early warning of landslide stability are carried out by utilizing the relation between the slope stability and the water content through the coupling needle type capacitive sensor and the local area self-networking wireless transmission device in the supporting structure, and the research and judgment accuracy rate of the slope stability is improved.
Drawings
The present application will now be further described with reference to the following drawings;
fig. 1 is a schematic view of a flexible mesh-encapsulated slope early warning support system according to the present application;
FIG. 2 is a schematic view of a support structure between primary and secondary grates;
FIG. 3 is a schematic cross-sectional view of a probe-type capacitive sensing stress conversion soil nail;
FIG. 4 is a schematic view of the overlapping of the soil bearing plates;
FIG. 5 is a schematic view of a supporting system formed by probe-type capacitive sensing stress conversion soil nails and glass fiber cables;
FIG. 6 is a schematic diagram of a parameter modulation circuit of the modulator;
fig. 7 is a flow chart of the work of the monitoring and early warning system.
In the above figures, 1, the first layer of grids; 2. the probe type capacitance sensing stress conversion soil nail; 3. glass fiber cables; 4. a soil bearing plate; 5. a sub-layer grid; 6. a slope soil body; 7. a planting soil cushion layer; 8. a vegetable layer; 9. a fiberglass cable connector; 10. a soil layer connector; 11. a through hole; 12. a bolt; 13. a nut; 14. a needle-type capacitance sensor; 15. a distributed wireless node; 16. a power supply module; 17. an oscillator; 18. a signal source and a modulator.
Detailed Description
To further illustrate the technical solutions adopted by the present application to achieve the intended design objectives, the following preferred embodiments are provided in conjunction with the accompanying drawings.
In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
Specifically, a plurality of groups of probe type capacitance sensing stress conversion soil nails 2 are inserted into the first layer of grid 1, one or more groups of glass fiber cables 3 with high strength are connected among the probe type capacitance sensing stress conversion soil nails 2 to form a flexible grid connection structure, and the slope is restrained after the first layer of grid 1 is buried into a slope soil body 6;
a soil bearing plate 4 is placed on the first layer of grid 1, the soil bearing plate 4 is positioned above at least two groups of probe type capacitance sensing stress conversion soil nails 2, and a planting soil cushion layer 7 is laid above the soil bearing plate 4;
a sublayer grid 5 is covered above a planting soil cushion layer 7, a plurality of groups of probe type capacitance sensing stress conversion soil nails 2 are inserted into the sublayer grid 5, and one group or a plurality of groups of glass fiber cables 3 with high strength are connected between the probe type capacitance sensing stress conversion soil nails 2 to form a flexible grid connection structure.
The first layer of grid 1 and the second layer of grid 5 are both made of glass fiber and other materials, and the selected materials meet the standard specified in geosynthetic plastic geogrid (GB/T17689-2008). Moreover, the first-layer grating 1 and the second-layer grating 5 are provided with a plurality of holes with the diameter not larger than 1cm, so that the vegetation layer 8 can grow conveniently.
The probe-type capacitance sensing stress conversion soil nail 2 is provided with a hollow soil layer connecting body 10, a glass fiber cable connecting body 9 is sleeved on the soil layer connecting body 10, and the probe-type capacitance sensing stress conversion soil nail 2 consisting of the components can disperse extrusion force generated by a side slope soil body 6 and/or a planting soil cushion 7 to the whole side slope early warning support system so as to further convert the extrusion force into anchoring force in the slope body.
Furthermore, the glass fiber cable connector 9 has a nut-like structure, two sides of the glass fiber cable connector are provided with symmetrically distributed ear holes, and the glass fiber cable 3 can transversely penetrate through the ear holes on the two sides in sequence;
the soil connecting body 10 is provided with a plurality of through holes 11, and a bolt 12 is inserted through one of the through holes 11 and locked by a nut 13. Therefore, the position of the glass fiber cable 3 constrained on the glass fiber cable connecting body 9 is adjusted according to the depth of the probe type capacitive sensing stress conversion soil nail 2 inserted into the first-layer grid 1 or the second-layer grid 5.
In the hollow cavity of the soil layer connector 10, a distributed wireless node 15 and a power supply module 16 are coupled in the top package, and a pin type capacitance sensor 14, an oscillator 17 and a signal source and modulator 18 are coupled in the bottom package.
As shown in fig. 6 and 7, the soil moisture content data obtained by monitoring the needle type capacitive sensor 14 in the side slope soil body 6 is subjected to parameter modulation by the oscillator 17. The frequency of the oscillator 17 is adjustable, and the influence of the soil conductivity on the water content detection can be eliminated correspondingly through the frequency modulation.
The specific principle is that a parameter lambda is introduced into an oscillator parameter modulation circuit, the lambda changes along with the change of switching frequency to obtain a circuit function after the parameter is introduced, when different values are given to the lambda, a group of circuit function equation sets can be obtained, and a capacitance value for eliminating conductance influence can be obtained by solving the equation sets;
in the circuit, the capacitor Cx and the resistor R are connected in parallel to replace soil; wherein R is the resistance of the soil; the resistor R is connected into a parameter modulation circuit consisting of an inductor L, a capacitor Co and an additional capacitor Ci, and the switch K is connected into the capacitor Ci according to a certain frequency.
The frequency of the change of the switch K is Ω, the transmission coefficient is:
voltage transient:
the coefficient m is a function containing a soil resistance value R, a capacitor Co and an additional capacitor Ci, and at the moment, the soil resistance value R can be eliminated by adjusting the circuit frequency, and the equation is obtained by arranging:
in the formula, the resistance value R of the soil is eliminated, namely the influence of electric conduction is eliminated.
Furthermore, through the inherent relation between the dielectric constant and the capacitance, under the action of an alternating electric field, the numerical value of the water content can be directly transmitted in a digital form after data processing is carried out through a signal source and a modulator 18 which are input through electric quantity conversion measurement, signal processing and digital-to-analog conversion.
The distributed wireless nodes 15 are connected with the needle type capacitance sensors 14 through data lines, the distributed wireless nodes 15 transmit collected data to the wireless gateway through a self-built ZigBee wireless network, and the wireless gateway transmits the data to the terminal of the management platform through the Internet, so that dynamic monitoring and early warning of the water content of the soil are realized.
By applying the flexible net to package the slope early warning support system, the application realizes the following early warning support method:
when the side slope soil body 6 generates lateral displacement, the probe type capacitance sensing stress conversion soil nails 2 generate tensile force to resist side slope sliding, the flexible surface layer consisting of the first layer of grids 1, the soil bearing plate 4 and the second layer of grids 5 can resist partial pressure between the adjacent probe type capacitance sensing stress conversion soil nails 2 and transmit the partial pressure to the slope body embedded and fixed by the probe type capacitance sensing stress conversion soil nails 2, and the tensile force generated by the flexible surface layer plays a role in keeping local stability of the slope surface.
The structure that plays the supporting role in this application is for holding native board 4, holds native board 4 overlap joint on probe-type capacitance sensing stress conversion soil nail 2, plays the supporting role to planting soil bed course 7 on its upper portion. The gravity of the planting soil cushion 7 acts on the soil bearing plate 4, and then is transmitted to the probe type capacitance sensing stress conversion soil nail 2 through the soil bearing plate 4, so that the possibility of collapse and damage of the planting soil cushion 7 is effectively reduced.
Based on the early warning support system, the early warning support method is realized, namely, the distributed wireless nodes 15 in the probe type capacitive sensing stress conversion soil nail 2 array transmit signals, the distributed wireless nodes 15 send data to a wireless gateway through a self-built ZigBee wireless network, and the wireless gateway transmits the data to a management platform through the Internet, so that the dynamic monitoring and early warning of the soil moisture content are realized.
In the embodiment, the seeds sowed in the planting soil 5 days after the planting are exposed out of the bud heads, the length of the vegetation is about 10cm after 15 days, and the vegetation covers the side slope and the probe-type capacitance sensing stress conversion soil nail 2 completely after 34 days. The medium-to-heavy rain wash is carried out on the 15 th day after the installation is finished, the stability is not abnormal, the monitoring system works normally, and the structure is not damaged.
The embodiment adopts the glass fiber grating, so that the using amount of non-degradable organic products in the construction process is greatly reduced. Meanwhile, on the premise of ensuring the safety of the support, the economical efficiency of the support scheme is ensured by reducing the construction cost.
Therefore, the soil mat layer supporting device is based on the principle of 'green environmental protection sustainability', and can realize stable supporting of a 10-40cm thick planting soil mat layer under any slope through a double-layer flexible net structure under the common constraint of the probe type capacitance sensing stress conversion soil nail 2 and the glass fiber cable 3.
Similar technical solutions can be derived from the solutions given in the figures and the description, as described above. However, any solution that does not depart from the structure of the present invention is intended to fall within the scope of the claims of the present application.
Claims (4)
1. A flexible net packaged slope early warning support method is characterized in that: inserting a plurality of groups of probe type capacitance sensing stress conversion soil nails on the first layer of grating, connecting one or more groups of glass fiber cables with higher strength among the probe type capacitance sensing stress conversion soil nails to form a flexible grid connection structure, and constraining the slope surface after the first layer of grating is buried in the slope soil body;
placing a soil bearing plate on the first layer of grid, wherein the soil bearing plate is positioned above at least two groups of probe type capacitance sensing stress conversion soil nails, and then laying a planting soil cushion layer above the soil bearing plate;
covering a sublayer grid above the planting soil cushion layer, inserting a plurality of groups of probe type capacitance sensing stress conversion soil nails on the sublayer grid, and connecting one or more groups of glass fiber cables with higher strength between the probe type capacitance sensing stress conversion soil nails to form a flexible grid connection structure;
the probe type capacitance sensing stress conversion soil nail is provided with a hollow soil layer connector, a glass fiber cable connector is sleeved on the soil layer connector, and a distributed wireless node, a power supply module, a needle type capacitance sensor, an oscillator, a signal source and a modulator are packaged and coupled in the soil layer connector;
when the side slope soil body generates lateral displacement, the probe type capacitance sensing stress conversion soil nail generates tensile force to resist the side slope sliding, and the flexible surface layer consisting of the first layer of grids, the soil bearing plate and the second layer of grids can resist partial pressure between the adjacent probe type capacitance sensing stress conversion soil nails and transmit the partial pressure to the slope body embedded with the probe type capacitance sensing stress conversion soil nail;
the soil bearing plate is lapped on the probe type capacitance sensing stress conversion soil nail and plays a role in bearing a planting soil cushion layer on the upper part of the soil bearing plate; the gravity of the planting soil cushion layer acts on the soil bearing plate and is transmitted to the probe type capacitance sensing stress conversion soil nail by the soil bearing plate;
the distributed wireless nodes in the probe type capacitance sensing stress conversion soil nail array transmit signals, the distributed wireless nodes send data to the wireless gateway through a self-built ZigBee wireless network, and the wireless gateway transmits the data to the management platform through the Internet, so that dynamic monitoring and early warning of the water content of the soil are realized.
2. The flexible net packaged slope early warning supporting method according to claim 1, characterized in that: the method is characterized in that soil water content data obtained by monitoring a needle type capacitance sensor in a slope soil body are subjected to parameter modulation through an oscillator, and the influence of soil conductivity on water content detection is eliminated through frequency adjustment of the oscillator.
3. The flexible net packaged slope early warning supporting method according to claim 2, characterized in that: introducing a parameter lambda into the oscillator parameter modulation circuit, wherein the lambda changes along with the change of the switching frequency to obtain a circuit function after the parameter is introduced, obtaining a group of circuit function equation sets when different values are assigned to the lambda, and solving the equation sets to obtain a capacitance value for eliminating the conductance influence;
in the circuit, the capacitor Cx and the resistor R are connected in parallel to replace soil; wherein R is the resistance of the soil; the resistor R is connected into a parameter modulation circuit consisting of an inductor L, a capacitor Co and an additional capacitor Ci, and the switch K is connected into the capacitor Ci according to a certain frequency.
The frequency of the change of the switch K is Ω, the transmission coefficient is:
voltage transient:
the coefficient m is a function containing a soil resistance value R, a capacitor Co and an additional capacitor Ci, and at the moment, the soil resistance value R can be eliminated by adjusting the circuit frequency, and the equation is obtained by arranging:
in the formula, the resistance value R of the soil is eliminated, namely the influence of electric conduction is eliminated.
4. The flexible net packaged slope early warning support method according to claim 3, characterized in that: under the action of alternating electric field, the water content value is directly output in digital form after data processing is carried out by a signal source and a modulator which are input through electric quantity conversion measurement, signal processing and digital-to-analog conversion.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116575483A (en) * | 2023-03-22 | 2023-08-11 | 中铁西南科学研究院有限公司 | Mountain reinforcing device for ecological restoration of mine |
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| JP2011185860A (en) * | 2010-03-10 | 2011-09-22 | Nippon Steel & Sumikin Metal Products Co Ltd | Slope stabilization system |
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| US20160183484A1 (en) * | 2014-11-03 | 2016-06-30 | MorpH2O Water Management, LLC | Soil Moisture Probe and System |
| CN106193071A (en) * | 2016-09-14 | 2016-12-07 | 山东科技大学 | The multiple structure Ecological Slope protection system of a kind of band diaphragm plate and construction method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116575483A (en) * | 2023-03-22 | 2023-08-11 | 中铁西南科学研究院有限公司 | Mountain reinforcing device for ecological restoration of mine |
| CN116575483B (en) * | 2023-03-22 | 2024-02-23 | 中铁西南科学研究院有限公司 | Mountain reinforcing device for ecological restoration of mine |
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