CN107063881A - A kind of landslide monitoring model equipment and its test method based on secondary audio technology - Google Patents

A kind of landslide monitoring model equipment and its test method based on secondary audio technology Download PDF

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Publication number
CN107063881A
CN107063881A CN201710317357.6A CN201710317357A CN107063881A CN 107063881 A CN107063881 A CN 107063881A CN 201710317357 A CN201710317357 A CN 201710317357A CN 107063881 A CN107063881 A CN 107063881A
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China
Prior art keywords
soil
sliding
landslide
infrasound
slip
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CN201710317357.6A
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CN107063881B (en
Inventor
张少杰
滕鹏晓
陈乔
韦方强
朱洪林
吕君
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Institute of Acoustics of CAS
Institute of Mountain Hazards and Environment IMHE of CAS
Chongqing Institute of Green and Intelligent Technology of CAS
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Institute of Acoustics of CAS
Institute of Mountain Hazards and Environment IMHE of CAS
Chongqing Institute of Green and Intelligent Technology of CAS
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12Pressure testing

Abstract

The invention discloses a kind of landslide monitoring model equipment and its test method based on secondary audio technology, belong to landslide monitoring technical field.Model equipment includes infrasound sensor, pressure sensor, jack, sliding block is accumulated to be formed by the soil body, the top surface of sliding block is an inclined ramp and is arranged on rigid non-slip block, non-slip block is formed by cement casting, non-slip bulk inner is hollow and its open top, the filling soil body and is tamped in hollow cavity;Jack is fixed on rigid wall, and described infrasound sensor is fixed at the top of bobbin by bobbin, and the stage casing and bottom of bobbin penetrate the top surface in sliding block, and the sidepiece on sliding block sets the pressure sensor should with jack pair.The present invention, which receives landslide o earth slope using infrasound sensor and faces the infrasound signals that are produced during sliding whole slide in stress local failure, passes to the whole process that control system completes monitoring slide mass landslide.

Description

A kind of landslide monitoring model equipment and its test method based on secondary audio technology
Technical field
The invention belongs to landslide monitoring technical field, especially with a kind of landslide monitoring model equipment based on secondary audio technology and Its test method is relevant.
Background technology
Landslide is broadly divided into two classes by rock soil medium:Landslide o earth slope and rock landslip.Landslide o earth slope is typically occurred in loosely On unconsolidated cohesive soil or sandy soil slope, when landslide o earth slope is slided, rubbing between the soil particle body at sliding surface can be produced Effect is wiped, it is different from the rock frictional test at rock landslip sliding surface.Most of at present, occupied in the world with landslide o earth slope.Landslide o earth slope Monitoring method be generally divided into three classes:(1) displacement monitoring on landslide:The earth precision measurement, GPS mensurations, Photogrammetry method, TDR methods, distribution type fiber-optic (being based on OTDR and BOTDR methods) and quasi-distributed fiber grating method.These methods are mainly used in monitoring The surface on landslide and deep displacement, it can be estimated that the stability on landslide;(2) the hydrologic parameter monitoring on landslide:Directly monitor the soil body The levels of ground water such as water content, pore water pressure and level of ground water, estimate the stability on landslide;(3) the mechanics monitoring on landslide:Utilize Anchor pole adds the mode of stressometer to devise the monitoring system of landslide sliding force, is provided not by the axial stress level for monitoring anchor pole Same landslide warning grade.The Zhu Xing and Ren Jizhou of Chengdu University of Technology respectively article " rock rupture detection of infrasound technology with Infrasonic monitoring landslide is mentioned in signal characteristic research " and article " the landslide monitoring early warning system research based on infrasonic sound wave technology " Content, but the object mainly studied is rock landslip, between this, applicant passes through the landslide o earth slope mould in design office The method of type experiment, receiving landslide o earth slope using infrasound sensor ,-local failure-is faced during cunning-whole slide and produced in stress Raw infrasound signals, variation characteristic of the analysis infrasound signals under the different collapse states that come down, and key signal is extracted, for sliding The dynamic monitoring of hill wash, realizes the landslide monitoring method based on secondary audio technology.
The content of the invention
The present invention is intended to provide a kind of, using infrasound sensor reception landslide o earth slope, in stress ,-local failure-faces sliding-overall The landslide monitoring model equipment and its test method based on secondary audio technology of the infrasound signals produced in sliding process.
Therefore, the present invention uses following technical scheme:Landslide monitoring model equipment based on secondary audio technology, including infrasonic sound are passed Sensor, pressure sensor, jack, sliding block are accumulated to be formed by the soil body, the top surface of sliding block for an inclined ramp simultaneously It is arranged on rigid non-slip block, non-slip block is formed by cement casting, non-slip bulk inner is hollow and it is pushed up The soil body is filled in portion's opening, hollow cavity and is tamped;Jack is fixed on rigid wall, and described infrasound sensor passes through cylinder Pipe is fixed at the top of bobbin, and the stage casing and bottom of bobbin penetrate the top surface in sliding block, and the sidepiece on sliding block is set Putting the pressure sensor should with jack pair.
As the supplement to above-mentioned technical proposal and perfect, present invention additionally comprises following technical characteristic.
The sliding block soil body accumulates the process to be formed and completes to fill by rigid trapezoid iron case.
Described bobbin is steel pipe.
A kind of landslide monitoring test method based on secondary audio technology, it is characterized in that, comprise the following steps:
1) soil body, is filled inside non-slip body and is tamped, after the soil body filling in non-slip body is finished, by rigid trapezoid Iron case is placed on non-slip kinetoplast top, by the constraint of rigid trapezoid iron case, starts in its internal earth filling tamping, and will be with secondary The steel pipe of sonic sensor inserts in rigid trapezoid iron case and is tamped steel pipe by the soil body together, waits after the completion of banketing, and utilizes The bolt and blinds of fastening, rigid trapezoid iron case is removed, and forms sliding block;
2), rectangular steel plates are placed between slide mass and pressure sensor, sliding force is simulated using hydraulic jack;It is non- Gliding mass by masonry in glide direction due to being limited, and the fricton-tight displacement of the soil body below sliding surface is produced, and sliding block by Acted in by thrust, when sliding force exceedes skid resistance, slip takes place in the block above masonry, does not occur in sliding block Before macroscopic view is slided, with slide mass junction (i.e. at sliding surface) under thrust shear action microcosmic soil particle cluster can occur for masonry It is broken and synchronous along with broken infrasound signals, supervised using the infrasound sensor fixed above the steel pipe for inserting inside soil body Survey and receive infrasound signals, infrasound sensor receives landslide o earth slope and faces sliding-macroscopical sliding process in stress-micro-damage-entirety The infrasound signals of middle generation pass to the whole process that control system completes monitoring slide mass landslide.
Following beneficial effect can be reached using the present invention:The present invention does not occur sliding the micro- of preceding internal soil particle with gliding mass It is to produce the root of landslide infrasonic sound to instruct to see broken and friction, and detection is provided on sliding block and produces landslide infrasonic sound Infrasound wave sensor, receiving landslide o earth slope using infrasound sensor ,-local failure-faces during cunning-whole slide in stress The infrasound signals of generation, variation characteristic of the analysis infrasound signals under the different collapse states that come down, and key signal is extracted, use The monitoring slided in landslide, realizes the landslide monitoring method based on secondary audio technology.The present invention is relative to existing monitoring method tool There is preferable stability, and data are accurate, can be widely applied on mountain landslide supervision.
Brief description of the drawings
Fig. 1 is model structure schematic diagram of the invention.
Fig. 2 is the variation diagram of soil body infrasound signals.
Fig. 3 is sliding force-infrasonic sound synchrodata figure.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, the present invention includes infrasound sensor, pressure sensor, jack, sliding block is accumulated by the soil body Formed, the top surface of sliding block is an inclined ramp and be arranged on rigid non-slip block that the soil body accumulates the process to be formed Complete to fill by rigid trapezoid iron case, non-slip block is formed by cement casting, non-slip bulk inner is hollow and it is pushed up The soil body is filled in portion's opening, hollow cavity and is tamped;Jack is fixed on rigid wall, and described infrasound sensor passes through cylinder Pipe is fixed on steel pipe top, and the stage casing and bottom of steel pipe penetrate the top surface in sliding block, and the sidepiece on sliding block is set Putting the pressure sensor should with jack pair.
Result of the test and analysis:This experiment implements altogether the infrasound signals monitoring test of 6 groups of different operating modes.In experiment The soil sample used comes from the domestic typical yellow soil in Fengjie County of Chongqing City.So-called different operating modes, are primarily referred to as in rigidity When filling the soil body in iron case, the degree of compacting is inconsistent.The infrasonic monitoring time is:It is further applied load since jack complete to the soil body Full destruction whole process.Fig. 2 show the variation diagram of soil body infrasound signals.From the point of view of 6 groups of oscillograms in Fig. 2, every group of landslide Infrasonic sound operating mode a crest of acoustic pressure occurs, before crest is reached, sound pressure signal is progressively enhanced;Reach crest Afterwards, acoustic pressure progressively weakens.As can be seen here, the crest location of acoustic pressure may be a characteristic signal point of landslide monitoring.In order to The infrasound signals of landslide o earth slope are further analyzed, to can be used in the monitoring on landslide, applicant is by infrasound signals, sliding force Mechanical signal and sliding surface time point that whole slide occur carry out united analysis, such as Fig. 3 gives the cunning of operating mode 2 and operating mode 5 Power-infrasonic sound synchrodata figure, the sliding force as shown by data measured by pressure sensor:It is sliding with the progressively pressure of jack The trend being stepped up is presented before not up to peak value in power, and works as the skid resistance for reaching gliding mass, and now pressure sensor is measured Slide force value and reach peak value (i.e. 370Kg in Fig. 3 a in 200Kg and Fig. 3 b);Before sliding force is not up to peak value, infrasonic sound letter Number intensity with the increase synchronous with sliding force of parabolical rule, when sliding force reaches peak value, the acoustic pressures of infrasound signals also phase That answers reaches peak value;The peak-peak of sliding force represents the skid resistance of the soil body, i.e.,:Now the destruction of sliding surface is passed through completely Logical, the soil particle area for participating in friction reaches maximum, thus also correspond to the maximum of infrasound signals.
Based on the qualitative analysis of above-mentioned sliding force and infrasound signals, it can be found that:Infrasound signals occur what is be stepped up Trend, which then represents, there is local destruction and slip at the sliding surface on landslide, landslide disaster early warning needs to send dangerous police at this moment Accuse;And the peak value of infrasound signals is to represent that landslide, in facing the sliding stage, represents the highest warning grade on landslide this moment.Thus may be used Early warning is monitored to landslide o earth slope using time audio technology to realize.
The design principle of the present invention:With the micro-scale friction between soil particle at sliding surface and it is broken be to produce landslide infrasonic sound Root is guidance.First from the point of view of macroscopic perspective, according to infinite slopes model or slices method it is assumed that more than sliding surface gliding mass quilt It is considered that the skid resistance at a homogeneous rigid body, sliding surface is multiplied by the soil body essentially from the vertical component of gliding mass self gravitation to rub The cohesive strength c of angle φ and soil body summation is wiped, when sliding force (due to factors such as precipitation) is higher than skid resistance, block more than sliding surface Body is slided, and now correspond to the sliding force of maximum;And from the point of view of microcosmic angle, block more than sliding surface is made by sliding force With before not sliding just, just occurring occurring small local mutual extruding, destruction between local failure, particle at sliding surface And friction, when the external force of macroscopic view increases to skid resistance, now the destruction at sliding surface is by insertion.So, from slopes stress it Afterwards, slopes just have begun to destruction at sliding surface, and with the increase of sliding force, the local failure at sliding surface is also incrementally increased, ginseng Particle area with attrition crushing and friction also can be bigger, and resulting landslide o earth slope infrasound signals can also increase therewith.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (4)

1. the landslide monitoring model equipment based on secondary audio technology, it is characterised in that:Including infrasound sensor, pressure sensor, thousand Jin top, sliding block is accumulated to be formed by the soil body, and the top surface of sliding block is an inclined ramp and is arranged on rigid non-slip On block, non-slip block is formed by cement casting, and non-slip bulk inner is hollow and its open top, is filled out in hollow cavity Fill the soil body and tamp;Jack is fixed on rigid wall, and described infrasound sensor is fixed at the top of bobbin by bobbin, cylinder The stage casing and bottom of pipe penetrate the top surface in sliding block, and the sidepiece on sliding block sets the pressure sensor and thousand Jin top correspondence.
2. the landslide monitoring model equipment according to claim 1 based on secondary audio technology, it is characterised in that:The soil body accumulates shape Into process pass through rigid trapezoid iron case complete filling.
3. the landslide monitoring model equipment according to claim 1 based on secondary audio technology, it is characterised in that:Described bobbin For steel pipe.
4. a kind of landslide monitoring test method based on secondary audio technology, it is characterised in that comprise the following steps:
1) soil body, is filled inside non-slip body and is tamped, after the soil body filling in non-slip body is finished, by rigid trapezoid iron case Non-slip kinetoplast top is placed on, by the constraint of rigid trapezoid iron case, is started in its internal earth filling tamping, and infrasound will be carried The steel pipe of sensor inserts in rigid trapezoid iron case and is tamped steel pipe by the soil body together, waits after the completion of banketing, utilizes fastening Bolt and blinds, rigid trapezoid iron case is removed, formed sliding block;
2), rectangular steel plates are placed between slide mass and pressure sensor, sliding force is simulated using hydraulic jack;Non- gliding mass Due to being limited by masonry in glide direction, the fricton-tight displacement of the soil body below sliding surface is produced, and sliding block due to by To the effect of thrust, when sliding force exceedes skid resistance, slip takes place in the block above masonry, and macroscopic view does not occur in sliding block Before slip, masonry can occur microcosmic soil particle cluster and crush with slide mass junction (i.e. at sliding surface) under thrust shear action, And it is synchronous along with broken infrasound signals, monitor and connect using the infrasound sensor fixed above the steel pipe for inserting inside soil body By infrasound signals, infrasound sensor receives landslide o earth slope and faces generation in sliding-macroscopical sliding process in stress-micro-damage-entirety Infrasound signals pass to control system complete monitoring slide mass landslide whole process.
CN201710317357.6A 2017-05-08 2017-05-08 A kind of landslide monitoring model equipment and its test method based on secondary audio technology Expired - Fee Related CN107063881B (en)

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN110196448A (en) * 2019-05-21 2019-09-03 成都信息工程大学 A kind of landslide infrasound signals recognition methods
CN110210084A (en) * 2019-05-18 2019-09-06 西南交通大学 The method and system of mechanical change judgement landslide possibility based on Fusion in Time
CN110320279A (en) * 2019-05-06 2019-10-11 清华大学 Landslide monitoring method based on active waveguide acoustic emission
CN110608676A (en) * 2019-08-26 2019-12-24 中国科学院重庆绿色智能技术研究院 Shear displacement measurement method, shear displacement measurement module and multi-parameter combined monitoring system
CN112326447A (en) * 2020-10-28 2021-02-05 重庆大学 Slope top triangular transformation stacking device and method for simulating push type landslide evolution

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CN104849432A (en) * 2015-05-21 2015-08-19 新疆工程学院 Strip mine rock step bedded slope landslide monitoring model

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110320279A (en) * 2019-05-06 2019-10-11 清华大学 Landslide monitoring method based on active waveguide acoustic emission
CN110210084A (en) * 2019-05-18 2019-09-06 西南交通大学 The method and system of mechanical change judgement landslide possibility based on Fusion in Time
CN110196448A (en) * 2019-05-21 2019-09-03 成都信息工程大学 A kind of landslide infrasound signals recognition methods
CN110196448B (en) * 2019-05-21 2020-06-16 成都信息工程大学 Landslide infrasound signal identification method
CN110608676A (en) * 2019-08-26 2019-12-24 中国科学院重庆绿色智能技术研究院 Shear displacement measurement method, shear displacement measurement module and multi-parameter combined monitoring system
CN112326447A (en) * 2020-10-28 2021-02-05 重庆大学 Slope top triangular transformation stacking device and method for simulating push type landslide evolution

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