CN111024282B - System and method for monitoring anchoring force of plant root system on slope rock soil - Google Patents
System and method for monitoring anchoring force of plant root system on slope rock soil Download PDFInfo
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- CN111024282B CN111024282B CN201911271057.4A CN201911271057A CN111024282B CN 111024282 B CN111024282 B CN 111024282B CN 201911271057 A CN201911271057 A CN 201911271057A CN 111024282 B CN111024282 B CN 111024282B
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
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Abstract
The invention belongs to the technical field of slope engineering monitoring, and discloses a system and a method for monitoring anchoring force of a plant root system on slope rock soil, wherein a distributed optical fiber sensing module acquires strain information of the slope rock soil of a layer where the plant root system is located; the distribution demodulator is used for resolving the wavelength of the sensing optical fiber for strain information of the layer slope rock soil where the plant root system is located to obtain wavelength change information; the data processor obtains stress strain data of the slope rock soil of the layer where the plant root system is located and anchoring force data of the plant root system to the slope rock soil according to the wavelength change information; and the computer management system forms a side slope plant type selection database according to the stress strain data of the side slope rock soil of the layer where the plant root system is located, the anchoring force data of the plant root system to the side slope rock soil, the side slope parameter information and the climate parameter information. The method can visually evaluate the reinforcement effect of the plants on the slope rock soil, and can provide scientific and reasonable basis for the type selection of the slope plants.
Description
Technical Field
The invention relates to the technical field of slope engineering monitoring, in particular to a system and a method for monitoring anchoring force of a plant root system on slope geotechnical soil.
Background
The vegetation slope protection technology is a slope protection technology for supporting a slope by basic knowledge of subjects such as comprehensive engineering mechanics, soil science, ecology, botany and the like to form a comprehensive slope protection system consisting of plants or engineering and plants, and is a technology for improving the problems of slope water and soil loss, slope instability and the like by utilizing natural plants. The plant slope protection has the characteristics of air purification, environment beautification and low subsequent support cost, which are not possessed by the traditional slope support technology such as concrete spraying and anchor rod support. In the slope engineering, because the variety of plants suitable for ecological slope protection is more, and the root characteristics and the application range of each vegetation are different from the specific situation of the slope, the selection of the most suitable plants in the plant slope protection engineering and the attention on maintenance management and effect monitoring in the engineering implementation process are particularly important to ensure the effect of the plant slope protection. However, there is no effective monitoring system and method at home and abroad, so it is urgently needed to develop a corresponding monitoring system and method.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides a system and a method for monitoring the anchoring force of a plant root system to slope rock soil.
The embodiment of the application provides a monitoring system for anchoring force of a plant root system to slope rock soil, which comprises a distributed optical fiber sensing module, a distributed demodulator, a data processor and a computer data management system;
the distributed optical fiber sensing module is used for acquiring strain information of slope rock soil of a layer where the plant root system is located;
the distributed demodulator is used for resolving the wavelength of the sensing optical fiber for strain information of the slope rock soil of the layer where the plant root system is located to obtain wavelength change information;
the data processor is used for obtaining stress strain data of the slope rock soil of the layer where the plant root system is located and anchoring force data of the plant root system to the slope rock soil according to the wavelength change information;
and the computer data management system is used for receiving the stress strain data of the slope rock soil of the layer where the plant root system is located and the anchoring force data of the plant root system to the slope rock soil, and summarizing the data with the slope parameter information and the climate parameter information to form a slope plant type selection database.
Preferably, the distributed optical fiber sensing module includes: the distributed sensing optical fiber and the temperature compensation module are arranged;
the distributed sensing optical fiber is pre-buried at a preset depth below a vertical slope surface of the side slope, and the preset depth is the root growth length of a plant at a preselected side slope;
the temperature compensation module is used for carrying out temperature compensation correction on the distributed sensing optical fiber.
Preferably, the distributed sensing optical fibers are pre-buried in a bow-shaped arrangement mode and are fully distributed in a monitoring area; one end of the distributed sensing optical fiber is directly connected with the distributed demodulator, and the other end of the distributed sensing optical fiber is connected with the distributed demodulator after passing through a slope monitoring path.
Preferably, the temperature compensation module includes: free optical fibers, protective tubes;
the free optical fibers are arranged in the protective tubes, the pre-buried depth of the free optical fibers is consistent with the pre-buried depth of the distributed sensing optical fibers, and the free optical fibers are used for eliminating the influence of temperature on a strain monitoring result.
Preferably, the data processor is connected with a first wireless transmission module, the computer data management system is connected with a second wireless transmission module, and the first wireless transmission module is connected with the second wireless transmission module in a wireless manner.
Preferably, the computer data management system includes: the system comprises a strain data collection module, an anchoring force data collection module, a slope parameter collection module, a climate condition parameter collection module and a slope plant type selection database;
the strain data collection module is used for collecting and storing stress strain data of the rock soil of the layer where the plant root system is located and summarizing the stress strain data;
the anchoring force data collection module is used for collecting and storing the anchoring force data of the plant root system on the slope rock soil and summarizing the anchoring force data;
the side slope parameter collecting module is used for collecting and storing side slope parameter information;
the climate condition parameter collecting module is used for collecting, storing and monitoring climate parameter information of the location of the side slope;
the side slope plant type selection database is used for obtaining side slope matched plants according to stress strain data of side slope rock soil of a layer where the plant root system is located, anchoring force data of the plant root system to the side slope rock soil, side slope parameter information and climate parameter information.
Preferably, the slope parameter information includes slope rate, slope height, slope surface area, gravity density, cohesive force and internal friction angle parameters of the slope; the climate parameter information comprises temperature change, rainfall, wind speed and illumination time.
Preferably, the slope plant type selection database comprises: the device comprises a parameter input module and a plant retrieval module;
the parameter input module is used for inputting the side slope parameter information and the climate parameter information;
the plant retrieval module is used for obtaining slope matching plants according to the stress strain data of the slope rock soil of the layer where the plant root system is located, the anchoring force data of the plant root system to the slope rock soil, the slope parameter information and the climate parameter information.
The embodiment of the application provides a method for monitoring anchoring force of a plant root system to slope rock and soil, and the method for monitoring anchoring force of the plant root system to the slope rock and soil comprises the following steps:
s1, acquiring strain information of the slope rock soil of the layer where the plant root system is located through a distributed optical fiber sensing module, and transmitting the strain information to a distributed demodulator; the distribution demodulator is used for resolving the wavelength of the sensing optical fiber for strain information of the slope rock soil of the layer where the plant root system is located to obtain wavelength change information and transmitting the wavelength change information to the data processor;
step S2, the data processor obtains stress-strain data of the layer of the plant root system on the slope rock and soil and anchoring force data of the plant root system on the slope rock and soil according to the wavelength change information, and transmits the stress-strain data of the layer of the plant root system on the slope rock and soil and the anchoring force data of the plant root system on the slope rock and soil to a computer data management system;
and S3, the computer management system forms a side slope plant type selection database according to the stress strain data of the side slope rock soil of the layer where the plant root system is located, the anchoring force data of the plant root system to the side slope rock soil, the side slope parameter information and the climate parameter information.
Preferably, in the step 2, the specific method for obtaining the stress-strain data of the slope rock soil of the layer where the plant root system is located and the anchoring force data of the plant root system to the slope rock soil by the data processor according to the wavelength change information is as follows:
and recording the strain value of the ith measuring point acquired by the distributed optical fiber sensing module asiCompression modulus of slope rock and soil is EsAnd the stress value of the ith measuring point of the slope rock soil is recorded as sigmaiAnd then:
σi＝Es·i(i＝1，2，3，4，...)
for any root section dl at the z depth below the surface of the vertical slope, the maximum static friction resultant force df borne by the whole root section dliComprises the following steps:
dfi＝Aσi＝2πr·σidl(i＝1，2，3，4，...)
wherein r is the radius of the root segment, and A is the surface area of the root segment;
dfiprojection component df in vertical directionz，iComprises the following steps:
dfz，i＝dficosθ＝2πr·σidz(i＝1，2，3，4，...)
within the extension range of the root system, the vertical root system is divided into n sections along the horizontal direction, and for any section [ i, i +1 ]](1 ≦ i ≦ N-1), obtaining the number N of roots in the segment1、N2、...、NnAnd the radius r of each rooti1、ri2、...、riNiAnd obtaining the average radius of the root in the n sections
The distribution function of the mean radius of the root in the direction of the depth z is r ═ p (z) and:
the distribution function of the number of roots in the depth z direction is N ═ q (z) and:
wherein, Pk(zi) Is a distribution function of the mean radius of the root of the k (k-0, 1.., n) th segment along the depth z direction,
is the mean radius of the root in the i-th section, Qk(zi) Is a distribution function of the number of roots of the k (k-0, 1.., n) th segment in the depth z direction,
function classes composed of all polynomials with degree not exceeding n;
such that:
wherein, akUnique solution a for the above equationk(k＝0，1，...，n)，ZiIs the depth of the ith segment;
solving a unique solution a by the above equationkFor:
when k is 1, a linear fit is obtained; when k is more than 1, fitting a polynomial;
such that:
solving a unique solution a by the above equationkFor:
when k is 1, a linear fit is obtained; when k is more than 1, fitting a polynomial;
in the range of z to z + dz below the vertical slope, the component of the maximum static friction force of the root system in the vertical direction is as follows:
∑dfz，i＝2πσiP(z)·Q(z)dz
and (3) integration processing:
wherein, T is the maximum anchoring force of the plant root system to the slope rock soil.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
in the embodiment of the application, the distributed optical fiber sensing modules are distributed in the slope rock soil, strain information of the layer slope rock soil where the plant root system is located is acquired, and then the strain information of the layer slope rock soil where the plant root system is located is resolved through the distributed regulator to obtain wavelength change information through sensing optical fiber wavelength; and then, stress strain data of the layer of the plant root system on the slope rock soil and anchoring force data of the plant root system on the slope rock soil are calculated through a data processor, the reinforcement effect of the plant on the slope rock soil can be visually evaluated, a slope support system mainly comprising plant protection slopes and assisting equipment supports is formed in slope engineering, and the cost of slope support can be effectively reduced. In addition, the measured data, the slope parameter information and the climate parameter information are subjected to data summarization to form a slope plant type selection database, scientific and reasonable bases are provided for the type selection of slope plants, and important references are provided for the slope selection of optimal planting plants.
Drawings
In order to more clearly illustrate the technical solution in the present embodiment, the drawings needed to be used in the description of the embodiment will be briefly introduced below, and it is obvious that the drawings in the following description are one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is an overall layout diagram of a monitoring system for anchoring force of a plant root system to slope rock and soil according to an embodiment of the invention;
FIG. 2 is an overall structural view of a system for monitoring anchoring force of a plant root system to slope rock and soil according to an embodiment of the invention;
FIG. 3 is a sectional view of slope root rock-soil in the method for monitoring the anchoring force of the plant root system to the slope rock-soil according to the embodiment of the invention.
The system comprises a side slope 1, a plant 2, a measuring point 3, a distributed sensing optical fiber 4, a temperature compensation module 5, a jumper 6, a distributed demodulator 7, a data processor 8, a first wireless transmission module 9, a second wireless transmission module 10, a computer data processing system 11, a plant root system 12, a distributed optical fiber sensing module 13, a strain data collection module 14, an anchoring force data collection module 15, a side slope parameter collection module 16, a climate condition parameter collection module 17 and a side slope vegetation type selection database 18.
Detailed Description
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
As shown in fig. 1 and fig. 2, the plant root system anchoring force monitoring system for slope rock soil provided by the embodiment includes: the device comprises a distributed optical fiber sensing module 13, a distributed demodulator 7, a data processor 8, a first wireless transmission module 9, a second wireless transmission module 10 and a computer data management system 11.
The distributed optical fiber sensing module 13 is connected with the distributed demodulator 7 through a jumper 6; the distributed demodulator 7 is connected with the data processor 8 through a wire; the data processor 8 is connected with the first wireless transmission module 9 through a wire; the first wireless transmission module 9 is wirelessly connected with the second wireless transmission module 10; the second wireless transmission module 10 is connected with the computer data management system 11 through a wire.
Wherein the distributed optical fiber sensing module 13 includes: the device comprises a distributed sensing optical fiber 4, a temperature compensation module 5 and an optical fiber protection tube. The distributed sensing optical fiber 4 is pre-buried at a position with a preset depth (for example, H is 0.6m) below the vertical slope surface of the side slope; the preset depth is the root growth length of the plants planted on the preselected side slope.
Specifically, the distributed sensing optical fiber 4 is pre-embedded at a position with a preset depth below the vertical slope surface of the side slope in a bow-shaped arrangement mode. The zigzag arrangement requires that the distributed sensing fibers 4 are arranged at preset intervals (for example, the interval B is 1.0m) to be distributed over the entire slope.
The distributed sensing optical fiber 4 is pre-buried in a loop mode and is arranged at a position with a preset depth below a vertical slope surface of a side slope. The loop type means that one end of the distributed sensing optical fiber 4 is directly connected with the distributed demodulator 7 through a jumper wire, and the other end of the distributed sensing optical fiber 4 passes through a monitoring path of a slope and then is connected with the distributed demodulator 7 through the jumper wire 6.
The temperature compensation module 5 includes: shielding tube (e.g. PU tube), free fiber. The free optical fibers are arranged in the protective tube, so that the free optical fibers are not influenced by the deformation of a slope soil body. The free optical fiber is used for eliminating the influence of temperature on a long-term strain monitoring result. The pre-buried depth of the free optical fiber is the same as the preset depth (for example, H ═ 0.6 m).
The optical fiber protection tube is used for protecting external optical fibers which are not embedded into the side slope; the jumper 6 is firstly welded on the external optical fiber, and then the jumper 6 is arranged in the optical fiber protection tube to be protected from the external environment.
The distributed optical fiber sensing module 13 can monitor the strain distribution state of the distributed sensing optical fiber 4 along the line mainly by arranging the distributed sensing optical fiber 4 in the slope rock soil, so as to monitor the strain of the slope rock soil of the layer where the plant root system is located, and transmit the monitored signal to the distributed demodulator 7 through the jumper 6 to calculate the wavelength.
The distributed demodulator 7 is configured to resolve wavelength variation generated by the strain on the distributed sensing optical fiber 4, and transmit resolved wavelength variation data to the data processor 8 through a wire.
The data processor receives the wavelength change data, carries out related algorithm processing on the data to obtain stress strain data of the slope rock soil of the layer where the plant root system is located, and obtains anchoring force data of the plant root system to the slope rock soil through calculation, so that positive influence of the plant root system on the slope rock soil stability and the effect of plant slope protection are evaluated.
The data processor 8 transmits the stress-strain data of the slope rock soil of the layer where the plant root system is located and the anchoring force data of the plant root system to the slope rock soil to the second wireless transmission module 10 through the first wireless transmission module 9 in a wireless mode. The second wireless receiving module 10 transmits data to the computer data management system 11 through a wire.
Wherein, the computer data management system 11 comprises: a strain data collection module 14, an anchorage force data collection module 15, a slope parameter collection module 16, a climate condition parameter collection module 17 and a slope plant type selection database 18.
The strain data collecting module 14 is configured to collect and store strain data of slope rock soil of a layer where the plant root system is located, perform summary processing on the strain data, and display the strain data on an interface of the computer data management system 11 in a graph form.
The anchoring force data collection module 15 is used for collecting and storing anchoring force data of the plant root system on slope rock soil, summarizing the anchoring force data, and displaying the data on an interface of the computer data management system 11 in a graph form.
The slope parameter collecting module 16 is configured to collect and store slope parameter information, and display the slope parameter information on an interface of the computer data management system 11. The side slope parameter information comprises the slope rate, the slope height, the slope surface area, the gravity density, the cohesive force, the internal friction angle parameter and the like of the side slope.
The climate condition parameter collecting module 17 is configured to collect, store and monitor climate parameter information of a location of the slope, and display the climate parameter information on an interface of the computer data management system 11. The climate parameter information comprises temperature change, rainfall, wind speed, illumination time and the like.
The slope plant type selection database 18 includes: parameter input module and plant retrieval module.
The parameter input module is used for inputting the slope parameter information and the climate parameter information by a user, and the plant retrieval module is used for automatically matching the slope planting optimal plant as a reference when the user selects the slope plant according to the data input condition.
The retrieval function of the plant retrieval module comprises the step of carrying out comparative analysis on the anchoring force of the side slope rock soil according to the growth condition of different plants when the different plants are planted on the same side slope and the root system, so that the optimal plants are selected for the side slope.
The type of the distributed sensing optical fiber 4 is WT-GL-101; the type of the jumper 6 is MPO-LC; the type selection of the distributed demodulator 7 is MWY-BOTDA 1200; the data processor 8 is of DP-E1 type; the first wireless transmission module 9 is selected to be WM 409; the second wireless transmission module 10 is selected to be WM 409; the computer data processing system 11 is preferably 6177R-RMPW 76177R.
The invention also provides a method for monitoring the anchoring force of the plant root system to the slope rock soil by utilizing the system for monitoring the anchoring force of the plant root system to the slope rock soil.
The method for monitoring the anchoring force of the plant root system to the slope rock soil provided by the embodiment is introduced by combining the figure 1, the figure 2 and the figure 3, and comprises the following steps:
step 1: the distributed optical fiber sensing module 13 acquires strain information of slope rock soil of a layer where the plant root system is located and transmits the strain information to the distributed demodulator 7 through the jumper 6, the distributed demodulator 7 resolves the collected strain data for sensing the wavelength of the optical fiber, and the resolved wavelength change data is transmitted to the data processor through a wire;
step 2: the data processor 8 receives the wavelength data of the distributed sensing optical fiber 4 transmitted by the distributed demodulator 7, performs related algorithm processing on the received data to obtain stress-strain data of the slope rock soil of the layer where the plant root system is located and anchoring force data of the plant root system on the slope rock soil, and wirelessly transmits the stress-strain data and the anchoring force data to the computer data management system 11;
and step 3: the computer management system 11 collects stress strain data of slope rock soil of a layer where the plant root system is located and anchoring force data of the plant root system to the slope rock soil, and summarizes the stress strain data, the anchoring force data, slope parameter information and climate parameter information to form a slope plant type selection database 18.
The specific method for obtaining the stress-strain data of the slope rock soil of the layer where the plant root system is located and the anchoring force data of the plant root system to the slope rock soil by the data processor 8 in the step 2 is as follows:
the strain value of the first measuring point acquired by the distributed optical fiber sensing module is1Strain value of the second measurement point2And the strain value of the third measuring point is3The strain value of the fourth measuring point is4…, strain value at the i-th measurement point ofi. Carrying out laboratory confined compression test according to the original side slope rock soil taken on site to obtain the compression modulus E of the side slope rock soilsAccording to the compression modulus E of slope rock-soilsStrain value of ith measuring point of slope rock soiliThe stress value sigma of the ith measuring point of the slope rock soil is calculatedi(i＝1，2，3，4，...)：
σi＝Es·i(i＝1，2，3，4，...)
Wherein E issCompressive modulus, sigma, of slope rockiIs the stress value of the rock soil on the side slope,istrain value of ith measuring point.
For any root segment dl at the z depth below the surface of the vertical slope (for example, any root segment dl with the rootstock at the z depth larger than 1 mm), the maximum static friction resultant force df borne by the whole root segment dliComprises the following steps:
dfi＝Aσi＝2πr·σidl(i＝1，2，3，4，...)
wherein df isiThe maximum static friction resultant force borne by the whole root segment dl, r is the radius of the root segment, and A is the surface area of the root segment.
dfiProjection component df in vertical directionz，iComprises the following steps:
dfz，i＝dficosθ＝2πr·σidz(i＝1，2，3，4，...)
for the whole root system, the component of the maximum static friction force on any root segment in the vertical direction and the inclination state (theta angle) of the root extensionIndependently, within the extension of the root system, the vertical root system is divided into n segments along the horizontal direction, the value of n depends on the length of the main root, and for any segment [ i, i +1 ]](i is more than or equal to 1 and less than or equal to N-1), and the number N can be obtainediAnd measuring the radius r of each rooti1、ri2、...、riNiTo obtain the average radius of the segment root
The distribution function of the mean radius of the root in the direction of the depth z is r ═ p (z) and:
wherein, Pk(zi) Is a distribution function of the mean radius of the root of the k (k-0, 1.., n) th segment along the depth z direction,
is the average radius of the root in the ith segment,
function classes composed of all polynomials with degree not exceeding n;
such that:
wherein, akUnique solution a for the above equationk(k＝0，1，...，n)，ZiIs the depth of the ith segment;
solving a unique solution a by the above equationk(k ═ 0, 1,. and, n), for
When k is 1, a linear fit is obtained; when k > 1, a polynomial fit is made.
In the extension range of root system, handle is arranged along the horizontal directionThe vertical root is divided equally into n segments, the value of n depending on the length of the main root, for any segment [ i, i +1 ]](i is more than or equal to 1 and less than or equal to N-1), and the number N can be obtained1、N2、...、NnThe distribution function of the number of roots in the depth z direction is N ═ q (z) and:
wherein Q isk(zi) A distribution function of the number of roots of the k (k ═ 0, 1.., n) th section in the depth z direction;
such that:
solving a unique solution a by the above equationk(k ═ 0, 1,. and, n), for
When k is 1, a linear fit is obtained; when k > 1, a polynomial fit is made.
Then the component of the maximum static friction force of the root system in the vertical direction in the range of z to z + dz below the vertical slope is:
∑dfz，i＝2πσiP(z)·Q(z)dz
therefore, the maximum anchoring force T of the plant root system to the slope rock soil is as follows:
in conclusion, the monitoring system and the monitoring method for the anchoring force of the plant root system to the slope rock soil, provided by the invention, can visually evaluate the reinforcement effect of the plant to the slope rock soil, form a slope support system taking the plant protection slope as a main part and taking the equipment support as an auxiliary part in the slope engineering, and can effectively reduce the cost of the slope support; the side slope plant type selection database can be formed, scientific and reasonable basis is provided for the type selection of the side slope plants, and important reference is provided for the selection of the optimal planting plants on the side slope.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (9)
1. The utility model provides a plant roots is to slope ground anchoring force monitoring system which characterized in that includes: the system comprises a distributed optical fiber sensing module, a distributed demodulator, a data processor and a computer data management system;
the distributed optical fiber sensing module is used for acquiring strain information of slope rock soil of a layer where the plant root system is located;
the distributed demodulator is used for resolving the wavelength of the sensing optical fiber for strain information of the slope rock soil of the layer where the plant root system is located to obtain wavelength change information;
the data processor is used for obtaining stress strain data of the slope rock soil of the layer where the plant root system is located and anchoring force data of the plant root system to the slope rock soil according to the wavelength change information;
the computer data management system is used for receiving stress strain data of slope rock soil of a layer where the plant root system is located and anchoring force data of the plant root system to the slope rock soil, and summarizing the stress strain data, the anchoring force data, slope parameter information and climate parameter information to form a slope plant type selection database;
wherein the computer data management system comprises: the system comprises a strain data collection module, an anchoring force data collection module, a slope parameter collection module, a climate condition parameter collection module and a slope plant type selection database;
the strain data collection module is used for collecting and storing stress strain data of the rock soil of the layer where the plant root system is located and summarizing the stress strain data;
the anchoring force data collection module is used for collecting and storing the anchoring force data of the plant root system on the slope rock soil and summarizing the anchoring force data;
the side slope parameter collecting module is used for collecting and storing side slope parameter information;
the climate condition parameter collecting module is used for collecting, storing and monitoring climate parameter information of the location of the side slope;
the side slope plant type selection database is used for obtaining side slope matched plants according to stress strain data of side slope rock soil of a layer where the plant root system is located, anchoring force data of the plant root system to the side slope rock soil, side slope parameter information and climate parameter information.
2. The system for monitoring anchoring force of a plant root system to slope rock and soil according to claim 1, wherein the distributed optical fiber sensing module comprises: the distributed sensing optical fiber and the temperature compensation module are arranged;
the distributed sensing optical fiber is pre-buried at a preset depth below a vertical slope surface of the side slope, and the preset depth is the root growth length of a plant at a preselected side slope;
the temperature compensation module is used for carrying out temperature compensation correction on the distributed sensing optical fiber.
3. The system for monitoring anchoring force of a plant root system to rock and soil on a slope according to claim 2, wherein the distributed sensing optical fibers are pre-embedded in a bow-shaped arrangement mode and are distributed in a monitoring area; one end of the distributed sensing optical fiber is directly connected with the distributed demodulator, and the other end of the distributed sensing optical fiber is connected with the distributed demodulator after passing through a slope monitoring path.
4. The system for monitoring anchoring force of a plant root system to rock and soil on a slope according to claim 2, wherein the temperature compensation module comprises: free optical fibers, protective tubes;
the free optical fibers are arranged in the protective tubes, the pre-buried depth of the free optical fibers is consistent with the pre-buried depth of the distributed sensing optical fibers, and the free optical fibers are used for eliminating the influence of temperature on a strain monitoring result.
5. The system for monitoring anchoring force of a plant root system to slope rock and soil according to claim 1, wherein the data processor is connected with a first wireless transmission module, the computer data management system is connected with a second wireless transmission module, and the first wireless transmission module is wirelessly connected with the second wireless transmission module.
6. The system for monitoring anchoring force of the plant root system to the slope rock and soil according to claim 1, wherein the slope parameter information comprises slope rate, slope height, slope surface area, gravity density, cohesive force and internal friction angle parameters of the slope; the climate parameter information comprises temperature change, rainfall, wind speed and illumination time.
7. The system for monitoring anchoring force of a plant root system to slope rock and soil according to claim 1, wherein the slope plant type selection database comprises: the device comprises a parameter input module and a plant retrieval module;
the parameter input module is used for inputting the side slope parameter information and the climate parameter information;
the plant retrieval module is used for obtaining slope matching plants according to the stress strain data of the slope rock soil of the layer where the plant root system is located, the anchoring force data of the plant root system to the slope rock soil, the slope parameter information and the climate parameter information.
8. A method for monitoring anchoring force of a plant root system to slope rock and soil, which is characterized in that the system for monitoring anchoring force of the plant root system to the slope rock and soil as claimed in any one of claims 1 to 7 is adopted, and the method comprises the following steps:
s1, acquiring strain information of the slope rock soil of the layer where the plant root system is located through a distributed optical fiber sensing module, and transmitting the strain information to a distributed demodulator; the distributed demodulator is used for resolving the wavelength of the sensing optical fiber for strain information of the slope rock soil of the layer where the plant root system is located to obtain wavelength change information and transmitting the wavelength change information to the data processor;
step S2, the data processor obtains stress-strain data of the layer of the plant root system on the slope rock and soil and anchoring force data of the plant root system on the slope rock and soil according to the wavelength change information, and transmits the stress-strain data of the layer of the plant root system on the slope rock and soil and the anchoring force data of the plant root system on the slope rock and soil to a computer data management system;
and S3, the computer management system forms a side slope plant type selection database according to the stress strain data of the side slope rock soil of the layer where the plant root system is located, the anchoring force data of the plant root system to the side slope rock soil, the side slope parameter information and the climate parameter information.
9. The method for monitoring the anchoring force of the plant root system to the slope rock-soil according to claim 8, wherein in the step 2, the data processor obtains the stress-strain data of the slope rock-soil of the layer where the plant root system is located and the anchoring force data of the plant root system to the slope rock-soil according to the wavelength change information by a specific method as follows:
and recording the strain value of the ith measuring point acquired by the distributed optical fiber sensing module asiCompression modulus of slope rock and soil is EsAnd the stress value of the ith measuring point of the slope rock soil is recorded as sigmaiAnd then:
σi＝Es·i(i＝1，2，3，4，...)
for any root section dl at the z depth below the surface of the vertical slope, the maximum static friction resultant force df borne by the whole root section dliComprises the following steps:
dfi＝Aσi＝2πr·σidl(i＝1，2，3，4，...)
wherein r is the radius of the root segment, and A is the surface area of the root segment;
dfiprojection component df in vertical directionz，iComprises the following steps:
dfz，i＝dficosθ＝2πr·σidz(i＝1，2，3，4，...)
within the extension range of the root system, the vertical root system is divided into n sections along the horizontal direction, and for any section [ i, i +1 ]](1 ≦ i ≦ N-1), obtaining the number N of roots in the segment1、N2、...、NnAnd the radius r of each rooti1、ri2、...、riNiAnd obtaining the average radius of the root in the n sections
The distribution function of the mean radius of the root in the direction of the depth z is r ═ p (z) and:
the distribution function of the number of roots in the depth z direction is N ═ q (z) and:
wherein, Pk(zi) Is a distribution function of the mean radius of the root of the k (k-0, 1.., n) th segment along the depth z direction,
is the mean radius of the root in the i-th section, Qk(zi) Is a distribution function of the number of roots of the k (k-0, 1.., n) th segment in the depth z direction,
function classes composed of all polynomials with degree not exceeding n;
such that:
wherein, akUnique solution a for the above equationk(k＝0，1，...，n)，ZiIs the depth of the ith segment;
solving a unique solution a by the above equationkFor:
when k is 1, a linear fit is obtained; when k is more than 1, fitting a polynomial;
such that:
solving a unique solution a by the above equationkFor:
when k is 1, a linear fit is obtained; when k is more than 1, fitting a polynomial;
in the range of z to z + dz below the vertical slope, the component of the maximum static friction force of the root system in the vertical direction is as follows:
∑dfz，i＝2πσiP(z)·Q(z)dz
and (3) integration processing:
wherein, T is the maximum anchoring force of the plant root system to the slope rock soil.
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| CN111912779A (en) * | 2020-08-20 | 2020-11-10 | 山西农业大学 | Monitoring device for anchoring force of plant root system to slope rock soil |
| CN112697997A (en) * | 2020-12-09 | 2021-04-23 | 南京大学 | Slope state inversion method based on distributed optical fiber strain sensing |
| CN113836630B (en) * | 2021-10-27 | 2022-05-17 | 水利部交通运输部国家能源局南京水利科学研究院 | Method and system for rapidly predicting river bank collapse by considering vegetation root influence |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202471566U (en) * | 2012-01-12 | 2012-10-03 | 胡忠志 | Concatenated experimental device for in-situ clustered root drawing experiment in root system of tree |
| CN106768560A (en) * | 2017-01-18 | 2017-05-31 | 三峡大学 | A kind of device of the radial pressure of simulation rock crack and measurement root system in crack |
| CN107860824A (en) * | 2017-10-23 | 2018-03-30 | 北京航空航天大学 | Visit anti-integral slope anchorage structure and detection method |
| CN207515936U (en) * | 2017-11-23 | 2018-06-19 | 湖北工业大学 | A kind of device for calculating the solid native actual cross-section withdrawal resistance of root system of plant in situ |
| CN108680441A (en) * | 2018-05-29 | 2018-10-19 | 四川大学 | Measure the pilot system and test method of side slope plant root-stem relation mechanical characteristic |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015006675A2 (en) * | 2013-07-11 | 2015-01-15 | Blue River Technology, Inc. | Method for automatic phenotype measurement and selection |
-
2019
- 2019-12-12 CN CN201911271057.4A patent/CN111024282B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202471566U (en) * | 2012-01-12 | 2012-10-03 | 胡忠志 | Concatenated experimental device for in-situ clustered root drawing experiment in root system of tree |
| CN106768560A (en) * | 2017-01-18 | 2017-05-31 | 三峡大学 | A kind of device of the radial pressure of simulation rock crack and measurement root system in crack |
| CN107860824A (en) * | 2017-10-23 | 2018-03-30 | 北京航空航天大学 | Visit anti-integral slope anchorage structure and detection method |
| CN207515936U (en) * | 2017-11-23 | 2018-06-19 | 湖北工业大学 | A kind of device for calculating the solid native actual cross-section withdrawal resistance of root system of plant in situ |
| CN108680441A (en) * | 2018-05-29 | 2018-10-19 | 四川大学 | Measure the pilot system and test method of side slope plant root-stem relation mechanical characteristic |
Non-Patent Citations (1)
| Title |
|---|
| 植物根系固土力学机理的研究进展;陆桂红 等;《南京林业大学学报（自然科学版）》;20140331;第38卷(第2期);151-156 * |
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