CN107063881B - 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 PDFInfo
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- CN107063881B CN107063881B CN201710317357.6A CN201710317357A CN107063881B CN 107063881 B CN107063881 B CN 107063881B CN 201710317357 A CN201710317357 A CN 201710317357A CN 107063881 B CN107063881 B CN 107063881B
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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Abstract
The invention discloses a kind of landslide monitoring model equipments 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 the non-slip block of rigidity, non-slip block is formed by cement casting, non-slip bulk inner is hollow and its top opening, and the soil body is filled in hollow cavity and is tamped；Jack is fixed on rigid wall, and the infrasound sensor is fixed at the top of bobbin by bobbin, and the middle section and bottom of bobbin penetrate the setting pressure sensor of the side in the top surface of sliding block, on sliding block and answer with jack pair.The present invention receives the infrasound signals that landslide o earth slope generates during cunning-whole slide is faced in stress-local failure-using infrasound sensor and passes to the whole process that control system completes monitoring slide mass landslide.
Description
Technical field
The invention belongs to landslide monitoring technical fields, especially with a kind of landslide monitoring model equipment based on secondary audio technology and
Its test method is related.
Background technique
Landslide is broadly divided into two classes: landslide o earth slope and rock landslip by rock soil medium.Landslide o earth slope typically occurs in loosely
On unconsolidated cohesive soil or sandy soil slope, when landslide o earth slope slides, rubbing between the soil particle body at sliding surface can be generated
Effect is wiped, it is different from the rock frictional test at rock landslip sliding surface.Currently, being occupied in the world with landslide o earth slope most of.Landslide o earth slope
Monitoring method be generally divided into three classes: (1) come down displacement monitoring: the earth precision measurement, GPS mensuration, Photogrammetry method,
TDR method, distribution type fiber-optic (being based on OTDR and BOTDR method) and quasi-distributed fiber grating method.These methods are mainly used for monitoring
The surface on landslide and deep displacement, it can be estimated that the stability on landslide；(2) the hydrologic parameter monitoring come down: the directly monitoring 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) it the mechanics monitoring come down: utilizes
Anchor pole adds the mode of stress meter to devise the monitoring system of landslide sliding force, is provided not by the axial stress level of 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 is by designing indoor landslide o earth slope mould
The method of type test receives landslide o earth slope using infrasound sensor and produces during cunning-whole slide is faced in stress-local failure-
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.
Summary of the invention
The present invention is intended to provide a kind of face sliding-entirety in stress-local failure-using infrasound sensor reception landslide o earth slope
The landslide monitoring model equipment and its test method based on secondary audio technology of the infrasound signals generated in sliding process.
For this purpose, the invention adopts the following technical scheme: the landslide monitoring model equipment based on secondary audio technology, including infrasonic sound pass
Sensor, pressure sensor, jack, sliding block are accumulated to be formed by the soil body, the top surface of sliding block be an inclined ramp simultaneously
It is arranged on the non-slip block of rigidity, non-slip block is formed by cement casting, and non-slip bulk inner is hollow and it is pushed up
Portion is open, and the soil body is filled in hollow cavity and is tamped；Jack is fixed on rigid wall, and the infrasound sensor passes through cylinder
Pipe is fixed at the top of bobbin, and the side that the middle section and bottom of bobbin are penetrated in the top surface of sliding block, on sliding block is set
The pressure sensor is set to answer with jack pair.
As supplement to above-mentioned technical proposal and perfect, the invention also includes following technical characteristics.
The sliding block soil body accumulates the process to be formed and completes filling by rigid trapezoid iron case.
The bobbin is steel pipe.
A kind of landslide monitoring test method based on secondary audio technology, characterized in that the following steps are included:
1) soil body, is filled in non-slip internal portion and is tamped, after filling to the non-slip intracorporal soil body, by rigid trapezoid
Iron case is placed on non-slip kinetoplast top, by the constraint of rigid trapezoid iron case, starts earth filling tamping inside it, and will be with secondary
The steel pipe of sonic sensor is inserted into rigid trapezoid iron case together and is tamped steel pipe by the soil body, after the completion of banketing, utilizes
The bolt and blinds of fastening remove rigid trapezoid iron case, form sliding block；
2), rectangular steel plates are placed between slide mass and pressure sensor, simulate sliding force using hydraulic jack；It is non-
Due to being limited in glide direction by masonry, the fricton-tight displacement of the sliding surface soil body below generates gliding mass, and sliding block by
In the effect by thrust, when sliding force is more than skid resistance, sliding takes place in the block above masonry, does not occur in sliding block
Before macroscopic view sliding, under thrust shear action microcosmic soil particle cluster can occur for masonry and slide mass junction (i.e. at sliding surface)
Broken and synchronous along with broken infrasound signals, the infrasound sensor fixed above the steel pipe using insertion inside soil body is supervised
Infrasound signals are surveyed and receive, 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.
It can achieve following using the present invention the utility model has the advantages that the present invention does not occur sliding the micro- of preceding internal soil particle with gliding mass
Seeing the root that broken and friction is generation landslide infrasonic sound is guidance, and setting, which is used to detect, on sliding block generates landslide infrasonic sound
Infrasound wave sensor receives landslide o earth slope during cunning-whole slide is faced in stress-local failure-using infrasound sensor
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, it is used for
The monitoring of landslide sliding, realizes the landslide monitoring method based on secondary audio technology.The present invention has relative to existing monitoring method
Preferable stability, and data are accurate, can be widely applied on mountain landslide supervision.
Detailed description of the invention
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.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the present invention includes infrasound sensor, pressure sensor, jack, sliding block is accumulated by the soil body
It is formed, the top surface of sliding block is an inclined ramp and is arranged on the non-slip block of rigidity that the soil body accumulates the process to be formed
It completes to fill by rigid trapezoid iron case, non-slip block is formed by cement casting, and non-slip bulk inner is hollow and it is pushed up
Portion is open, and the soil body is filled in hollow cavity and is tamped；Jack is fixed on rigid wall, and the infrasound sensor passes through cylinder
Pipe is fixed on steel pipe top, and the side that the middle section and bottom of steel pipe are penetrated in the top surface of sliding block, on sliding block is set
The pressure sensor is set to answer with jack pair.
Test result and analysis: this test implements altogether the infrasound signals monitoring test of 6 groups of difference operating conditions.In test
Used soil sample is from Fengjie County of Chongqing City's typical yellow soil within the border.So-called difference operating condition, is primarily referred to as in rigidity
When filling the soil body in iron case, the degree of compacting is inconsistent.The infrasonic monitoring time are as follows: be further applied load since jack complete to the soil body
It is complete to destroy whole process.Fig. 2 show the variation diagram of soil body infrasound signals.From the point of view of 6 groups of waveform diagrams in Fig. 2, every group of landslide
Infrasonic sound operating condition will appear a wave crest of acoustic pressure, before reaching wave crest, sound pressure signal gradually enhances；Reach wave crest
Afterwards, acoustic pressure gradually weakens.It can be seen that 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
The time point that whole slide occur in mechanical signal and sliding surface carries out united analysis, as Fig. 3 gives the sliding of operating condition 2 and operating condition 5
Power-infrasonic sound synchrodata figure, by the sliding force of pressure sensor measurement statistics indicate that: with the gradually pressure of jack, sliding
The trend being stepped up is presented before not up to peak value in power, and when the skid resistance for reaching gliding mass, pressure sensor measures cunning at this time
Power value reaches peak value (i.e. 370Kg in Fig. 3 a in 200Kg and Fig. 3 b)；Before sliding force is not up to peak value, infrasound signals
Intensity with parabolical rule it is synchronous with sliding force increase, when sliding force reaches peak value, the acoustic pressure of infrasound signals is also corresponding
Reach peak value；The peak-peak of sliding force represents the skid resistance of the soil body, it may be assumed that the destruction of sliding surface at this time by completely through,
The soil particle area for participating in friction reaches maximum value, thus also corresponds to the maximum value of infrasound signals.
Based on the qualitative analysis of above-mentioned sliding force and infrasound signals, it can be found that: what being stepped up occurred in infrasound signals
Trend then represents the destruction and sliding for occurring part at the sliding surface on landslide, and landslide disaster early warning needs to issue dangerous police at this moment
It accuses；And the peak value of infrasound signals indicates 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.
Design principle of the invention: between soil particle at sliding surface micro-scale friction and it is broken be to generate 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
Be considered a homogeneous rigid body, the skid resistance at sliding surface mainly from gliding mass self gravity vertical component multiplied by rubbing in the soil body
The summation for wiping the cohesive strength c of angle φ and the soil body, the block when sliding force (due to factors such as precipitation) are higher than skid resistance, more than sliding surface
Body slides, and corresponds to maximum sliding force at this time；And from the point of view of microcosmic angle, the work of more than sliding surface block by sliding force
With, before not sliding just, just occur local failure at sliding surface, occur between particle small local mutual extrusion, destroy
And friction, when the external force of macroscopic view increases to skid resistance, the destruction at sliding surface is penetrated through at this time.So from slopes stress it
Afterwards, slopes just have begun destruction at sliding surface, and with the increase of sliding force, the local failure at sliding surface is also incrementally increased, ginseng
Also can be bigger with attrition crushing and the particle area of friction, resulting landslide o earth slope infrasound signals can also increase therewith.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, 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 are accumulated to be formed by the soil body, and the top surface of sliding block is an inclined ramp and the non-slip of rigidity is arranged in
On block, non-slip block is formed by cement casting, and non-slip bulk inner is hollow and its top opening, is filled out in hollow cavity
It fills the soil body and tamps；Jack is fixed on rigid wall, and the infrasound sensor is fixed at the top of bobbin by bobbin, cylinder
The middle section and bottom of pipe penetrate the side in the top surface of sliding block, on sliding block and the pressure sensor and thousand are arranged
Jin top corresponds to.
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
At process by 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: the bobbin
For steel pipe.
4. a kind of landslide monitoring test method based on secondary audio technology, which comprises the following steps:
1) soil body, is filled in non-slip internal portion and is tamped, after filling to the non-slip intracorporal soil body, by rigid trapezoid iron
Case is placed on non-slip kinetoplast top, by the constraint of rigid trapezoid iron case, starts earth filling tamping inside it, and will have infrasonic sound
The steel pipe of wave sensor is inserted into rigid trapezoid iron case together and is tamped steel pipe by the soil body, after the completion of banketing, using tight
Solid bolt and blinds, rigid trapezoid iron case is removed, formed sliding block；
2), rectangular steel plates are placed between sliding block and pressure sensor, simulate sliding force using hydraulic jack；It is non-slip
Due to being limited in glide direction by masonry, the fricton-tight displacement of the sliding surface soil body below generates kinetoplast, and sliding block by
In the effect by thrust, when sliding force is more than skid resistance, sliding takes place in the block above masonry, does not occur in sliding block
Before macroscopic view sliding, microcosmic soil particle cluster can occur for masonry and sliding block junction broken and same under thrust shear action
Along with broken infrasound signals, the infrasound sensor fixed above the steel pipe using insertion inside soil body is monitored and is received secondary step
Acoustical signal, infrasound sensor receive landslide o earth slope and face time generated in sliding-macroscopical sliding process in stress-micro-damage-entirety
Acoustical signal passes to the whole process that control system completes monitoring slide mass landslide.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320279B (en) * | 2019-05-06 | 2020-11-03 | 清华大学 | Landslide monitoring method based on active waveguide acoustic emission technology |
| CN110210084B (en) * | 2019-05-18 | 2022-06-28 | 西南交通大学 | Method and system for judging landslide possibility based on time fusion mechanical change |
| CN110196448B (en) * | 2019-05-21 | 2020-06-16 | 成都信息工程大学 | Landslide infrasound signal identification method |
| CN110608676B (en) * | 2019-08-26 | 2021-10-26 | 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 |
| CN112326447B (en) * | 2020-10-28 | 2021-10-08 | 重庆大学 | Slope top triangular transformation stacking device and method for simulating push type landslide evolution |
| CN114509558A (en) * | 2022-02-15 | 2022-05-17 | 四川大学 | Testing device with locking section landslide river-blocking dam-forming mechanism, control method and application |
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| CN101799284A (en) * | 2010-03-19 | 2010-08-11 | 成都理工大学 | Wave monitoring plant for impending landslides |
| CN104596459A (en) * | 2015-01-21 | 2015-05-06 | 中核华泰建设有限公司 | Landslide monitoring system and monitoring method thereof |
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