CN103472207B - Equivalent looseness measuring method used for mountain landslide early warning - Google Patents
Equivalent looseness measuring method used for mountain landslide early warning Download PDFInfo
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Abstract
The invention relates to the research field of mountain landslide quantitative detection methods, in particular to an equivalent looseness measuring method used for mountain landslide early warning. N measuring points are set in an area of a mountain to be detected at equal intervals, and a low-frequency acceleration sensor in the vertical direction and a speed sensor in the vertical direction are simultaneously installed; the vibration acceleration signals in the vertical direction and vibration speed signals in the vertical direction caused by micro vibration of the earth surface of the mountain are acquired completely synchronously at the same sampling time interval, phase position calculation is carried out on the vibration acceleration signals and the vibration speed signal of each measuring point to obtain the average phase difference between the vibration acceleration and the vibration speed of each measuring point within measuring time, and the average value of the average phase differences of all the measuring points in the area serves as the equivalent looseness of the mountain. Through periodic detection of the measured mountain and recording and tracking of the equivalent looseness, real-time and quantitative tracking of the sliding possibility of the measured mountain is achieved.
Description
Technical field
The present invention relates to landslide, region quantitative detecting method research field, particularly a kind of equivalent fraction void measuring method for landslide early-warning.
Background technology
China is one of multiple country of geologic hazard, especially serious with landslide disaster.According to incompletely statistics, China has more than 70 city and 460 Duo Ge counties and cities to be subject to threat and the harm of landslide disaster, at least causes the economic loss of 15 ~ 2,300,000,000 yuan every year on average.Meanwhile, the construction of a lot of key state project and operation are also subject to the threat of landslide disaster, as the hydraulic engineerings such as the Yangtze River Gorges and Xi Xiandong send engineering etc.In recent years, the Chinese government has dropped into great concern to geologic hazard, each department's strength of the tissue whole nation, the preventing and controlling of the landslide disaster that is in full swing.But due to the complicacy of landslide easy happen zone geologic condition, still there is the possibility that continuous deformation even slides in the landslide of much having carried out administering.Therefore, for landslide monitoring and predict that same tool is of great significance.At present, the monitoring means of landslide are mostly carried out in the mode of micro-judgment, there is workload and greatly, be usually subject to severe weather conditions restriction, judge many deficiencies such as the accuracy difference of mountain slide; The present invention, in quantitative mode, by the continuous monitoring to landslide, can grasp the evolution process of sliding mass, catches the characteristic information of Rockfall hazard in time, for Correct Analysis, evaluation landslide and Landslide Prediction, forecast etc. provide reliable data and scientific basis.
Summary of the invention
The object of the invention is to overcome existing to the deficiency in the detection technique of landslide, realize to measure mountain slide possibility real-time, quantitatively follow the tracks of.
For achieving the above object, technical scheme of the present invention is: a kind of equivalent fraction void measuring method for landslide early-warning, is characterized in that:
S01: at one of massif to be measured circumferentially, equidistantly sets up N number of measurement point;
S02: simultaneously install the acceleration transducer of vertical direction and the speed pickup of vertical direction on each measurement point, and carry out the micro-vibration acceleration in each measurement point earth's surface and vibration velocity synchronization dynamic measurement;
S03: with identical sampling time interval, the vertical vibration acceleration of the micro-vibration in synchronous acquisition each measurement point earth's surface and vertical vibration speed;
S04: separately phase calculation is carried out to each measurement point vertical vibration acceleration obtained and vertical vibration rate signal, show that the vertical vibration acceleration of each measurement point is to the average phase-difference of vertical vibration speed in Measuring Time respectively, the mean value of the average phase-difference of each measurement point of gained, namely as the equivalent fraction void of this massif measured zone.
Further, desirable eight relative directions circumferentially in the described direction residing for each measurement point.
Further, described acceleration transducer is low-frequency acceleration sensor; Described speed pickup is low-frequency velocity sensor.
Further, the described N number of measurement point equidistantly distributed, keeps immobilizing in above-mentioned repetitive measurement.
Further, the position residing for described each measurement point and ground list catenation, enable the micro-vibration in earth's surface that accelerator sensor and speed pickup totally tansitive massif produce due to surrounding environment.
Further, described N be greater than 0 natural number, and N is 8.
Further, after described equivalent fraction void obtains, by online mode, dynamic track record is carried out, according to the increase and decrease situation of equivalent fraction void to the equivalent fraction void measuring massif, judge the concrete condition measuring massif, and judge whether the early warning making landslide.
Compared to prior art, the present invention has following beneficial effect: the present invention uses low-frequency acceleration sensor and speed pickup to come the micro-vibration acceleration in earth's surface of Real-Time Monitoring massif and micro-vibration velocity, and calculate vibration acceleration to the phase differential mean value of vibration velocity in Measuring Time and measured zone, record and follow the tracks of total phase differential mean value and equivalent fraction void, by the method can realize to measured zone massif online, detect in real time and quantitatively.
Embodiment
By describing technology contents of the present invention, structural attitude in detail, being realized object and effect, be illustrated below in conjunction with specific embodiment.
The invention provides a kind of equivalent fraction void measuring method for landslide early-warning, it is characterized in that:
S01: at one of massif to be measured circumferentially, equidistantly sets up N number of measurement point;
S02: simultaneously install the acceleration transducer of vertical direction and the speed pickup of vertical direction on each measurement point, and carry out the micro-vibration acceleration in each measurement point earth's surface and vibration velocity synchronization dynamic measurement;
S03: with identical sampling time interval, the vertical vibration acceleration of the micro-vibration in synchronous acquisition each measurement point earth's surface and vertical vibration speed;
S04: separately phase calculation is carried out to each measurement point vertical vibration acceleration obtained and vertical vibration rate signal, show that the vertical vibration acceleration of each measurement point is to the average phase-difference of vertical vibration speed in Measuring Time respectively, the mean value of the average phase-difference of each measurement point of gained, namely as the equivalent fraction void of this massif measured zone.
In order to determine the concrete orientation of each measurement point, desirable eight relative directions circumferentially in the described direction residing for each measurement point.
Described acceleration transducer is low-frequency acceleration sensor; Described speed pickup is low-frequency velocity sensor.
In order to ensure the accurate and effective of measured value, the described N number of measurement point equidistantly distributed, keeps immobilizing in above-mentioned repetitive measurement.
In order to ensure the accuracy that acceleration transducer and speed pickup are measured, the position residing for described each measurement point and ground list catenation, enable the micro-vibration in earth's surface that acceleration transducer and speed pickup totally tansitive massif produce due to surrounding environment.
Described N be greater than 0 natural number, and N is 8.
In order to realize the early warning to landslide, after described equivalent fraction void obtains, by online mode, dynamic track record is carried out, according to the increase and decrease situation of equivalent fraction void to the equivalent fraction void measuring massif, judge the concrete condition measuring massif, and judge whether the early warning making landslide.
Below in conjunction with specific embodiment, present invention is described, and its concrete steps are as follows:
Step S01: set up measurement point:
A radius of massif to be measured be 50m circumferentially, equidistantly set up 8 measurement points, and 8 measurement point are in eight relative directions of circumference;
In order to ensure the accurate and effective of measured value, equidistantly distribute 8 described measurement points, keep immobilizing in the measurements;
In order to ensure the accuracy that acceleration transducer and speed pickup are measured, the position residing for described each measurement point and ground list catenation, enable the micro-vibration in earth's surface that acceleration transducer and speed pickup totally tansitive massif produce due to surrounding environment;
Step S02: install acceleration transducer and speed pickup:
Each measurement point is installed the low-frequency acceleration sensor of vertical direction (Z-direction) and the low-frequency velocity sensor of vertical direction (Z-direction) simultaneously, and carries out the micro-vibration acceleration in each measurement point earth's surface and vibration velocity synchronization dynamic measurement;
Step S03: gather vibration acceleration signal and vibration velocity signal:
With identical sampling time interval 10ms, Complete Synchronization gathers vertical direction (Z-direction) vibration acceleration signal and vertical direction (Z-direction) the vibration velocity signal of the micro-vibration in each measurement point earth's surface;
Step S04: process vibration acceleration signal and vibration velocity signal:
Separately phase calculation is carried out to each measurement point vertical direction (Z-direction) vibration acceleration signal obtained and vertical direction (Z-direction) vibration velocity signal, show that vertical direction (Z-direction) vibration acceleration of each measurement point is to the average phase-difference of vertical direction (Z-direction) vibration velocity in Measuring Time respectively, the mean value of the average phase-difference of each measurement point of gained, namely as the equivalent fraction void of this massif measured zone.
During due to massif generation slip, the overall average phase difference value that survey calculation obtains and equivalent fraction void will occur significantly to increase, by recording and following the tracks of massif equivalence fraction void, when equivalent fraction void rising more than 10%, just correspond to this massif and may produce slip, landslide early-warning is made according to equivalent fraction void, therefore can in real-time, quantitative and dynamic mode, the real-time quantitative realized measuring mountain slide is followed the tracks of.
It is more than preferred embodiment of the present invention; a kind of equivalent fraction void measuring method for landslide early-warning that all changes done according to technical solution of the present invention obtain; when the function produced does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (6)
1., for an equivalent fraction void measuring method for landslide early-warning, it is characterized in that:
S01: at one of massif to be measured circumferentially, equidistantly sets up N number of measurement point;
S02: simultaneously install the acceleration transducer of vertical direction and the speed pickup of vertical direction on each measurement point, and carry out the micro-vibration acceleration in each measurement point earth's surface and vibration velocity synchronization dynamic measurement;
S03: with identical sampling time interval, the vertical vibration acceleration of the micro-vibration in synchronous acquisition each measurement point earth's surface and vertical vibration speed;
S04: separately phase calculation is carried out to each measurement point vertical vibration acceleration obtained and vertical vibration rate signal, show that the vertical vibration acceleration of each measurement point is to the average phase-difference of vertical vibration speed in Measuring Time respectively, the mean value of the average phase-difference of each measurement point of gained, namely as the equivalent fraction void of this massif measured zone;
S05: after described equivalent fraction void obtains, carry out dynamic track record by online mode to the equivalent fraction void measuring massif, according to the increase and decrease situation of equivalent fraction void, judges the concrete condition measuring massif, and judges whether the early warning making landslide.
2. the equivalent fraction void measuring method for landslide early-warning according to claim 1, is characterized in that: eight relative directions are circumferentially got in the described direction residing for each measurement point.
3. the equivalent fraction void measuring method for landslide early-warning according to claim 1, is characterized in that: described acceleration transducer is low-frequency acceleration sensor; Described speed pickup is low-frequency velocity sensor.
4. the equivalent fraction void measuring method for landslide early-warning according to claim 1, is characterized in that: the described N number of measurement point equidistantly distributed, keeps immobilizing in above-mentioned repetitive measurement.
5. the equivalent fraction void measuring method for landslide early-warning according to claim 1, it is characterized in that: the position residing for described each measurement point and ground list catenation, enable the micro-vibration in earth's surface that acceleration transducer and speed pickup totally tansitive massif produce due to surrounding environment.
6. the equivalent fraction void measuring method for landslide early-warning according to claim 1 or 4, is characterized in that: described N is 8.
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| CN106297197B (en) * | 2015-04-07 | 2018-07-17 | 北京师范大学 | A method of for measuring Earthquake-landslide |
| CN105372088A (en) * | 2015-11-30 | 2016-03-02 | 福州大学 | Dam body safety quantitative and online detection method |
| CN105928603B (en) * | 2016-04-28 | 2019-03-19 | 河南丹江大观苑旅游有限公司 | A kind of scenic spot massif monitoring system based on Fibre Optical Sensor |
| CN106023532B (en) * | 2016-08-01 | 2018-04-17 | 江苏怡龙医疗科技有限公司 | A kind of landslide alarm system |
| CN106327803B (en) * | 2016-08-16 | 2018-06-19 | 辽宁工程技术大学 | A kind of weighting markov landslide method for early warning based on mean-standard deviation |
| CN111243241A (en) * | 2020-03-10 | 2020-06-05 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队 | Landslide early warning system |
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| CN102163363A (en) * | 2011-04-07 | 2011-08-24 | 北京航空航天大学 | Landslide real-time monitoring and warning system |
| CN103150871A (en) * | 2013-01-31 | 2013-06-12 | 青岛理工大学 | Landslide prediction method utilizing underground water level and displacement real-time monitoring |
| CN103243743A (en) * | 2013-05-21 | 2013-08-14 | 福州大学 | Quantitative detection method of safe reliability of tower foundation of wind generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102163363A (en) * | 2011-04-07 | 2011-08-24 | 北京航空航天大学 | Landslide real-time monitoring and warning system |
| CN103150871A (en) * | 2013-01-31 | 2013-06-12 | 青岛理工大学 | Landslide prediction method utilizing underground water level and displacement real-time monitoring |
| CN103243743A (en) * | 2013-05-21 | 2013-08-14 | 福州大学 | Quantitative detection method of safe reliability of tower foundation of wind generator |
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