CN114606959B - Flexible net encapsulation slope early warning support system - Google Patents
Flexible net encapsulation slope early warning support system Download PDFInfo
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- CN114606959B CN114606959B CN202210236293.8A CN202210236293A CN114606959B CN 114606959 B CN114606959 B CN 114606959B CN 202210236293 A CN202210236293 A CN 202210236293A CN 114606959 B CN114606959 B CN 114606959B
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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
- 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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- 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
- E02D2300/00—Materials
- E02D2300/0084—Geogrids
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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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- 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
Abstract
The flexible network packaging side slope early warning support system adopts a double-layer flexible network structure under the common constraint of the stress conversion device and the high-strength glass fiber cable, so that the probe type capacitive sensor and the local self-built network are coupled in the support system to carry out wireless data transmission, the stable support of the planting soil cushion layer with the thickness of 10-40cm under any gradient condition is realized, and the relation between the side slope stability and the water content is utilized to carry out dynamic monitoring and real-time early warning on the landslide stability. The flexible net packaging side slope early warning support system comprises a first layer grid, an array of probe type capacitive sensing stress conversion soil nails, glass fiber ropes, a soil bearing plate, a sub-layer grid and a wireless gateway.
Description
Technical Field
The invention relates to a flexible net packaging side slope early warning support system applied to municipal engineering roadbed and side slope protection, and belongs to the technical field of environmental engineering.
Background
Along with the rapid development of the economy in China, the requirements for environmental engineering protection work of various municipal roadbeds, mountain slopes and the like are higher and higher. Because of wide national operators and complex and various geological conditions in different regions, the phenomenon of collapse and landslide of mountain and soil mass is frequent and serious, and the phenomenon becomes a restriction factor which seriously affects national economic development and personal safety.
The existing slope protection engineering still has the problems of larger consumption of building materials such as sand, stone, cement and the like along with the traditional protection measures in the construction process, so that serious ecological damage phenomenon is caused, and the damaged ecological system can be recovered only after long time. The applicable slope angle range of the current ecological side slope support is limited, the effective support is difficult to form for steep slopes with high dangers, the dangers are easy to occur under extremely severe weather conditions, and great property loss is caused. Meanwhile, collapse and landslide are often closely related to the water content of the soil body of the side slope, so that the environmental problems generated in the side slope support are properly solved, the environment-friendly sustainable construction to support is realized, and the importance of all relevant departments is increased.
In view of this, the present patent application is specifically filed.
Disclosure of Invention
The utility model provides a flexible net encapsulation side slope early warning support system, in the problem that solves prior art existence and take the double-deck flexible net structure under stress conversion device and the common constraint of high strength glass fiber rope to couple probe capacitive sensor and local self-construction net and carry out wireless data transmission in support system, in order to realize the stable support to 10-40cm layer thick planting soil bed course under the arbitrary slope condition, utilize side slope stability and moisture content's relation to carry out dynamic monitoring and real-time early warning to landslide stability.
In order to achieve the design purpose, the flexible net packaging side slope early warning support system comprises a first layer grid, an array of probe type capacitance sensing stress conversion soil nails and glass fiber ropes, a soil bearing plate, a sub-layer grid and a wireless gateway; inserting a plurality of groups of probe type capacitance sensing stress conversion soil nails on the first layer of grids, connecting one or more groups of glass fiber ropes with higher strength among the probe type capacitance sensing stress conversion soil nails to form a flexible grid connection structure, and restraining the slope after the first layer of grids are buried in the slope soil body; a soil bearing plate is arranged on the first layer of grille and is positioned above at least two groups of probe type capacitance sensing stress conversion soil nails, and then a planting soil cushion layer is paved 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 ropes with higher strength among 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 connecting body, a glass fiber rope connecting body is sleeved on the soil layer connecting body, and distributed wireless nodes, 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 connecting body.
Further, the distributed wireless nodes are connected with the needle type capacitance sensor through data lines, the distributed wireless nodes send collected data to the wireless gateway through the ZigBee wireless network, and the wireless gateway transmits the data to the terminal of the management platform through the Internet.
Further, the first layer of grids and the second layer of grids are made of glass fibers, and the first layer of grids and the second layer of grids are provided with a plurality of holes with diameters not larger than 1 cm.
Further, two sides of the glass fiber rope connector are provided with earholes which are symmetrically distributed, and the glass fiber rope transversely penetrates through the earholes on two sides in sequence; the soil layer connector is provided with a plurality of through holes, and the bolt passes through one of the through holes and is locked by a nut at the outside.
In summary, the flexible net packaging side slope early warning support system has the following advantages:
1. the application is based on the principle of 'green sustainable', and realizes the stable support of the planting soil cushion layer with the thickness of 10-40cm under any gradient through the probe type capacitance sensing stress conversion soil nail and the flexible net structure under the constraint of the glass fiber rope. Meanwhile, the monitoring and early warning module of the support system can accurately monitor the water content data of the slope soil body in real time.
2. By the application of the method, when the side slope generates lateral displacement, the probe type capacitance sensing stress conversion soil nails generate tensile force to resist the sliding of the side slope, the flexible surface layer resists partial soil pressure among 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 bearing effect in this design is the soil bearing plate, and soil bearing plate overlap joint is on probe capacitive sensing stress conversion soil nail, plays the bearing effect to its upper portion planting soil bed course. The gravity of the cushion layer acts on the soil bearing plate, and then the soil bearing plate transmits the soil bearing plate to the probe type capacitance sensing stress conversion soil nails, so that the collapse and damage possibility of the cushion layer is reduced.
3. The double-layer flexible net structure under the constraint of the probe type capacitance sensing stress conversion soil nail and the glass fiber rope 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 plant growth requirement of the ecological slope, and breaks through the limitation of small applicable slope angle range of the traditional ecological slope support technology.
4. The application adopts novel environment-friendly materials, and the use amount of concrete and steel in the construction process is greatly reduced. Meanwhile, on the premise of ensuring the supporting safety, the economical efficiency of the supporting scheme is ensured by reducing the construction cost.
5. According to the method, the needle type capacitive sensor and the local self-built network wireless transmission equipment are coupled in the supporting structure, the relation between the slope stability and the water content is utilized to dynamically monitor and early warn the landslide stability, and the accuracy rate of research and judgment on the slope stability is improved.
Drawings
The present application will now be further described with reference to the following figures;
FIG. 1 is a schematic diagram of a side slope early warning support system encapsulated by a flexible mesh according to the present application;
FIG. 2 is a schematic view of a support structure between a first layer and a sub-layer grid;
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 a soil bearing plate overlap joint;
FIG. 5 is a schematic diagram of a supporting system consisting of a probe-type capacitive sensing stress conversion soil nail and a glass fiber rope;
FIG. 6 is a schematic diagram of a parameter modulation circuit of a modulator;
FIG. 7 is a flow chart of a monitoring based early warning system.
In the above figures, 1, first layer grating; 2. a probe type capacitance sensing stress conversion soil nail; 3. glass fiber ropes; 4. a soil bearing plate; 5. a sublayer grid; 6. a side slope soil body; 7. planting a soil cushion layer; 8. a vegetation layer; 9. a glass fiber rope connector; 10. a soil layer connecting body; 11. a through hole; 12. a bolt; 13. a nut; 14. a needle-type capacitive sensor; 15. a distributed wireless node; 16. a power supply module; 17. an oscillator; 18. a signal source and a modulator.
Detailed Description
In order to further illustrate the technical means adopted by the present application to achieve the preset design purpose, the following preferred embodiments are presented 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 present invention may be embodied in many other forms than those herein described, and those skilled in the art may readily devise numerous other arrangements that do not depart from the spirit of the invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.
In embodiment 1, as shown in fig. 1 to 7, the application provides a novel flexible net packaging slope early warning support system, which comprises a first layer grid 1, an array of probe type capacitive sensing stress conversion soil nails 2, glass fiber ropes 3, a soil bearing plate 4, a sublayer grid 5 and a wireless gateway.
Specifically, a plurality of groups of probe type capacitance sensing stress conversion soil nails 2 are inserted into the first layer grating 1, one or more groups of glass fiber ropes 3 with higher strength are connected between the probe type capacitance sensing stress conversion soil nails 2 to form a flexible grid connection structure, and the first layer grating 1 is buried into a slope soil body 6 to restrict the slope;
a soil bearing plate 4 is arranged on the first layer grating 1, the soil bearing plate 4 is positioned on at least two groups of probe type capacitance sensing stress conversion soil nails 2, and a planting soil cushion layer 7 is paved above the soil bearing plate 4;
the method comprises the steps of covering a sublayer grid 5 above a planting soil cushion layer 7, inserting a plurality of groups of probe type capacitance sensing stress conversion soil nails 2 on the sublayer grid 5, and connecting one or more groups of glass fiber ropes 3 with higher strength among the probe type capacitance sensing stress conversion soil nails 2 to form a flexible grid connection structure.
The first layer grating 1 and the second layer grating 5 are 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 diameters 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 rope connecting body 9 is sleeved on the soil layer connecting body 10, and the probe type capacitance sensing stress conversion soil nail 2 formed by the components can disperse extrusion force generated by a slope soil body 6 and/or a planting soil cushion layer 7 to the whole slope early warning support system so as to be further converted into anchoring force in the slope.
Further, the glass fiber rope connector 9 has a nut-like structure, two sides of the glass fiber rope connector are provided with symmetrically distributed earholes, and the glass fiber rope 3 can transversely sequentially pass through the earholes at two sides;
the soil layer connector 10 is provided with a plurality of through holes 11, and a bolt 12 passes through one of the through holes 11 and is externally locked by a nut 13. Thereby, the position of the glass fiber rope 3 restrained on the glass fiber rope connector 9 is adjusted according to the depth of the probe type capacitance sensing stress conversion soil nail 2 inserted into the first layer grating 1 or the sub layer grating 5.
In the hollow cavity of the soil layer connector 10, a distributed wireless node 15 and a power supply module 16 are coupled at the top package, and a pin-type capacitance sensor 14, an oscillator 17, a signal source and a modulator 18 are coupled at the bottom package.
As shown in fig. 6 and 7, the soil moisture content data obtained by the needle-type capacitance sensor 14 monitoring in the side slope soil body 6 is subjected to parameter modulation via the oscillator 17. The frequency of the oscillator 17 is adjustable, and the influence of the soil conductance on the water content detection can be eliminated correspondingly through frequency modulation.
The specific principle is that parameters lambda are introduced into an oscillator parameter modulation circuit, the lambda changes along with the change of the switching frequency, a circuit function after the parameters are introduced is obtained, when different values are given to lambda, a group of circuit function equation sets can be obtained, and the equation sets can be solved to obtain a capacitance value for eliminating the influence of electric conduction;
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 formed by 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 switch K change is Ω, then the transfer coefficient:
there is a voltage transient:
the coefficient m is a function containing a soil resistance value R, a capacitor Co and an additional capacitor Ci, and at this time, the soil resistance value R can be eliminated by adjusting the circuit frequency, and the equation is obtained by arrangement:
the formula has no soil resistance R, namely the conductivity influence is eliminated.
Further, through the inherent relation between the dielectric constant and the capacitance, under the action of the alternating electric field, the digital value of the water content can be directly transmitted in digital form after the data processing of the signal source and the modulator 18 which are input through the conversion measurement of electric quantity, the signal processing and the digital-to-analog conversion.
The distributed wireless node 15 is connected with the needle type capacitance sensor 14 through a data line, the distributed wireless node 15 sends collected data to a wireless gateway through a self-built ZigBee wireless network, and the wireless gateway transmits the data to a terminal of a management platform through the Internet, so that dynamic monitoring and early warning of the soil moisture content are realized.
By applying the flexible network packaging side slope early warning support system, the application simultaneously 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 the side slope sliding, the flexible surface layer formed by the first layer grating 1, the soil bearing plate 4 and the sub-layer grating 5 can resist partial pressure between the adjacent probe type capacitance sensing stress conversion soil nails 2, the partial pressure is transferred to the slope body embedded 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 the local stability of the slope surface.
The structure that plays the bearing effect in this application is the soil bearing plate 4, and soil bearing plate 4 overlap joint is on probe capacitive sensing stress conversion soil nail 2, plays the bearing effect to the planting soil bed course 7 on its upper portion. The gravity of the planting soil cushion layer 7 acts on the soil bearing plate 4, and then the gravity is transmitted to the probe type capacitance sensing stress conversion soil nails 2 by the soil bearing plate 4, so that the possibility of collapse and damage of the planting soil cushion layer 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 transmit 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 bud heads of the seeds sowed in the planting soil 5 days after completion are exposed, the vegetation length is about 10cm after 15 days, and the vegetation completely covers the side slope and the probe type capacitance sensing stress conversion soil nail 2 after 34 days. The monitoring system is subjected to medium to heavy rain flushing on the 15 th day after the installation is finished, the stability of the monitoring system is not abnormal, the monitoring system works normally, and the structure is not damaged.
The embodiment adopts the glass fiber grille, thereby greatly reducing the consumption of nondegradable organic products in the construction process. Meanwhile, on the premise of ensuring the supporting safety, the economical efficiency of the supporting scheme is ensured by reducing the construction cost.
Therefore, the method is based on the principle of green and environment-friendly sustainable, and can realize stable support of the planting soil cushion layer with the thickness of 10-40cm under any gradient through the double-layer flexible net structure under the common constraint of the probe type capacitance sensing stress conversion soil nail 2 and the glass fiber rope 3.
Similar technical solutions can be derived from the solution content presented in connection with the figures and description, as described above. But all the solutions without departing from the structure of the present invention still fall within the scope of the claims of the technical solution of the present application.
Claims (2)
1. A flexible net encapsulation side slope early warning support system which characterized in that: the device comprises a first layer grid, an array of probe type capacitance sensing stress conversion soil nails, glass fiber ropes, a soil bearing plate, a sublayer grid and a wireless gateway;
inserting a plurality of groups of probe type capacitance sensing stress conversion soil nails on the first layer of grids, connecting one or more groups of glass fiber ropes with higher strength among the probe type capacitance sensing stress conversion soil nails to form a flexible grid connection structure, and restraining the slope after the first layer of grids are buried in the slope soil body;
a soil bearing plate is arranged on the first layer of grille and is positioned above at least two groups of probe type capacitance sensing stress conversion soil nails, and then a planting soil cushion layer is paved 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 ropes with higher strength among 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 connecting body, a glass fiber rope connecting body is sleeved on the soil layer connecting body, and distributed wireless nodes, 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 connecting body;
the distributed wireless nodes are connected with the needle-type capacitance sensor through data lines, the distributed wireless nodes send collected data to the wireless gateway through the ZigBee wireless network, and the wireless gateway transmits the data to a terminal of the management platform through the Internet;
the glass fiber rope connector is characterized in that two sides of the glass fiber rope connector are provided with earholes which are symmetrically distributed, and the glass fiber rope transversely sequentially passes through the earholes at two sides; the soil layer connecting body is provided with a plurality of through holes, and a bolt passes through one of the through holes and is locked outside by a nut;
introducing parameters lambda into an oscillator parameter modulation circuit, wherein lambda changes along with the change of a switching frequency to obtain a circuit function after introducing the parameters, when lambda is given different values, a group of circuit function equation sets can be obtained, and a capacitance value for eliminating the influence of electric conduction 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 formed by 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 switch K change is Ω, then the transfer coefficient:
there is a voltage transient:
the coefficient m is a function containing a soil resistance value R, a capacitor Co and an additional capacitor Ci, and at this time, the soil resistance value R can be eliminated by adjusting the circuit frequency, and the equation is obtained by arrangement:
the formula has no soil resistance R, namely the conductivity influence is eliminated.
2. The flexible mesh enclosure slope early warning support system of claim 1, wherein: the first layer grating and the second layer grating are made of glass fibers, and the first layer grating and the second layer grating are provided with a plurality of holes with diameters not larger than 1 cm.
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| CN110777823A (en) * | 2019-11-19 | 2020-02-11 | 中航勘察设计研究院有限公司 | Flexible net surface layer and rigid beam composite soil nailing wall supporting system |
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| JP5455717B2 (en) * | 2010-03-10 | 2014-03-26 | 日鐵住金建材株式会社 | Slope stabilization system |
| CN201891116U (en) * | 2010-11-02 | 2011-07-06 | 孙涛 | Wall supporting system comprising flexible surface layer and soil nails |
| 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 |
| CN208167826U (en) * | 2017-08-31 | 2018-11-30 | 湖南工业大学 | A kind of monitoring of expansive soil slope and guard system |
| CN109253691A (en) * | 2018-10-22 | 2019-01-22 | 长沙理工大学 | A kind of Monitoring of Slope Deformation and prior-warning device |
| US11243182B2 (en) * | 2019-02-05 | 2022-02-08 | AGI Suretrack LLC | Moisture soil probe system |
| CN111595388A (en) * | 2020-06-24 | 2020-08-28 | 湘潭大学 | Humiture sensing intelligence stock |
| CN213926249U (en) * | 2020-10-15 | 2021-08-10 | 三峡大学 | Anchor rod capable of adjusting anchoring effect based on water content and stress change |
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| CN110777823A (en) * | 2019-11-19 | 2020-02-11 | 中航勘察设计研究院有限公司 | Flexible net surface layer and rigid beam composite soil nailing wall supporting system |
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