CN114001686A - Device for monitoring displacement deformation of sliding surface of soil slope - Google Patents
Device for monitoring displacement deformation of sliding surface of soil slope Download PDFInfo
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- CN114001686A CN114001686A CN202111078463.6A CN202111078463A CN114001686A CN 114001686 A CN114001686 A CN 114001686A CN 202111078463 A CN202111078463 A CN 202111078463A CN 114001686 A CN114001686 A CN 114001686A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 46
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 15
- 239000002689 soil Substances 0.000 title claims abstract description 15
- 239000011159 matrix material Substances 0.000 claims abstract description 30
- 239000000919 ceramic Substances 0.000 claims abstract description 16
- 238000004458 analytical method Methods 0.000 claims abstract description 13
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 5
- 239000004579 marble Substances 0.000 claims description 5
- 239000005022 packaging material Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 18
- 238000012806 monitoring device Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000005476 size effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006335 epoxy glue Polymers 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/04—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring the deformation in a solid, e.g. by vibrating string
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- General Physics & Mathematics (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention discloses a device for monitoring displacement deformation of a sliding surface of a soil slope, which comprises an elastic matrix, a piezoelectric intelligent aggregate sensor, a sliding surface, a sliding bed, a sliding mass, an electric lead, an NI data acquisition and analysis system, a computer and a piezoelectric ceramic piece. The invention relates to the technical field of geotechnical engineering slope monitoring, in particular to a device for monitoring displacement deformation of a soil slope sliding surface. In addition, the invention also has the characteristics of sensitive sensing, safety, reliability, large measurement range and the like.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering slope monitoring, in particular to a device for monitoring displacement deformation of a sliding surface of a soil slope.
Background
With the continuous and rapid development of national economy, the construction of national infrastructure is increasing day by day. It is worth noting that China is a country with multiple mountains and hills, the terrain is high in the west and low in the east, the landforms are complex and various, the mountain areas account for 2/3 of the land areas in China, and the landslide and potential landslide areas account for 1/5-1/4 of the land areas in China. In the construction of engineering facilities in mountainous and hilly areas, a side slope is one of the most common and unavoidable engineering forms. The side slope is easy to collapse due to instability. The collapse body and the landslide body invade road traffic facilities, influence the driving safety, even bury the road, interrupt the traffic, cause immeasurable economic loss, seriously threaten the life and property safety of people and the traffic and transportation safety of the country.
Landslide disasters are usually characterized by frequency, outburst, strong destructiveness and the like, and have profound influence on human production and life. With the continuous and rapid development of national economy and the construction of large-scale engineering facilities, the frequency and scale of landslide disasters tend to increase. Therefore, the method has important theoretical significance and practical value for effectively monitoring the heavy-point slope engineering and ensuring the engineering construction and the life and property safety of people.
The indoor side slope model test is widely applied to landslide research and has great significance. The indoor slope model monitoring test is developed aiming at the problems of slope deep deformation, instability and slippage, and is particularly important for mastering and understanding the evolution process of slope deep instability slippage in real time and further early warning landslide disasters.
In the research of the side slope model test, the common side slope slip monitoring method comprises the following steps: fiber grating methods, borehole inclinometer methods, acoustic emission methods, and the like. However, the above method has the following disadvantages: the method has the advantages of large testing workload, low automation degree, difficult remote operation, insufficient real-time performance and the like, and limits the application of the method in slope monitoring.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a device for monitoring the displacement deformation of the sliding surface of the soil slope, and solves the problems that the measurement and test workload is large, the real-time performance is insufficient, the sliding and deformation monitoring of a reduced-scale slope model is difficult to adapt, and particularly the distributed deformation and instability sliding monitoring of the reduced-scale slope model is realized in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a device for monitoring displacement deformation of a soil slope sliding surface comprises an elastic base body, a piezoelectric intelligent aggregate sensor, a sliding surface, a sliding bed, a sliding slope body, an electric lead, an NI data acquisition and analysis system, a computer and a piezoelectric ceramic piece.
The landslide body is located on the slip plane of slide bed one side, the internal grafting of landslide has elastic base member, and elastic base member's one end extends to the depths of slide bed.
A plurality of piezoelectric intelligent aggregate sensors are arranged in the elastic base body, the elastic base body and the piezoelectric intelligent aggregate sensors are adhered through epoxy resin glue, and the piezoelectric intelligent aggregate sensors emit stress waves in the elastic base body.
The piezoelectric ceramic piece is installed on the piezoelectric intelligent aggregate sensor, and the piezoelectric ceramic piece is electrically connected with an external NI data acquisition and analysis system through an electric lead, and the NI data acquisition and analysis system is connected with an external computer.
Preferably, the piezoelectric intelligent aggregate sensor is adhered to two ends of the elastic base body.
Preferably, the elastic matrix is a cylinder, the interface size is the same as that of the piezoelectric intelligent aggregate sensor, the diameter of the elastic matrix is 25mm, and the length direction of the elastic matrix is parallel to that of the piezoelectric intelligent aggregate sensor.
Preferably, the distance between the adjacent piezoelectric intelligent aggregate sensors is not more than 100 mm.
Preferably, the number of the piezoelectric intelligent aggregate sensors is at least two, and more than two piezoelectric intelligent aggregate sensors are adhered along the length direction of the elastic matrix; at least three elastic matrixes are arranged; the piezoelectric intelligent aggregate sensor is connected with a signal transmitting and collecting system sequentially through an electric lead along the length direction of the elastic matrix.
Preferably, the elastic base body is a rubber component, the piezoelectric intelligent aggregate sensor takes a piezoelectric ceramic piece PZT as a sensitive element, and marble as a packaging material.
(III) advantageous effects
The invention provides a device for monitoring displacement deformation of a sliding surface of a soil slope. The method has the following beneficial effects:
compared with the existing slope slip monitoring technology, the device for monitoring the slope model slip based on the piezoelectric intelligent aggregate has no size effect aiming at the slope scale model, the length of the elastic matrix and the number of the piezoelectric intelligent aggregate sensors are adjusted according to the buried depth of the slope model slip surface, and distributed monitoring of deformation and unstable slip of the scale slope model is further realized. In addition, the invention also has the characteristics of sensitive sensing, safety, reliability, large measurement range and the like.
Drawings
FIG. 1 is a schematic installation diagram of a device for monitoring the deformation of a sliding surface of a slope according to an embodiment of the invention;
FIG. 2 is a schematic view of the internal structure of the piezoelectric intelligent aggregate sensor implanted with the piezoelectric ceramic piece according to the present invention;
fig. 3 is a schematic diagram of deformation slip monitoring according to an embodiment of the present invention.
In the figure: 1. an elastic base; 2. a piezoelectric intelligent aggregate sensor; 3. a sliding surface; 4. sliding the bed; 5. stress wave; 6. a landslide body; 7. an electrical lead; 8. an NI data acquisition and analysis system; 9. a computer; 10. piezoelectric ceramic piece.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-3, the present invention provides a technical solution: a device for monitoring displacement deformation of a soil slope sliding surface comprises an elastic base body 1, a piezoelectric intelligent aggregate sensor 2, a sliding surface 3, a sliding bed 4, a sliding mass 6, an electric lead 7, an NI data acquisition and analysis system 8, a computer 9 and a piezoelectric ceramic piece 10.
The landslide body 6 is located on the sliding surface 3 on one side of the sliding bed 4, the elastic base body 1 is inserted in the landslide body 6, the elastic base body 1 is a cylinder, the interface size is the same as that of the piezoelectric intelligent aggregate sensor 2, the diameters of the elastic base body 1 and the piezoelectric intelligent aggregate sensor 2 are both 25mm, the length direction of the elastic base body 1 is parallel to the length direction of the piezoelectric intelligent aggregate sensor 2, and one end of the elastic base body 1 extends to the deep part of the sliding bed 4.
A plurality of piezoelectric intelligent aggregate sensors 2 are arranged in the elastic base body 1, the elastic base body 1 is a rubber component, the piezoelectric intelligent aggregate sensors 2 take piezoelectric ceramic pieces PZT as sensitive elements and marble as packaging materials, at least two piezoelectric intelligent aggregate sensors 2 are arranged, and more than two piezoelectric intelligent aggregate sensors 2 are adhered along the length direction of the elastic base body 1; the number of the elastic matrixes 1 is at least three; the intelligent piezoelectric aggregate sensors 2 are connected with a signal emission and acquisition system sequentially through electric leads 7 along the length direction of the elastic base body 1, the distance between the adjacent intelligent piezoelectric aggregate sensors 2 is not more than 100mm, the elastic base body 1 and the intelligent piezoelectric aggregate sensors 2 are adhered through epoxy resin glue, the intelligent piezoelectric aggregate sensors 2 are adhered to two ends of the elastic base body 1, and the intelligent piezoelectric aggregate sensors 2 emit stress waves 5 in the elastic base body 1.
The piezoelectric ceramic piece 10 is installed on the piezoelectric intelligent aggregate sensor 2, the piezoelectric ceramic piece 10 is electrically connected with an external NI data acquisition and analysis system 8 through an electric lead 7, and the NI data acquisition and analysis system 8 is connected with an external computer 9.
The device and the method for monitoring the slope model slippage based on the piezoelectric intelligent aggregate provided by the invention are explained. As shown in fig. 1, when the sliding state of the sliding mass on the sliding bed 4 along the sliding surface needs to be monitored, the device for monitoring the sliding of the slope model based on the piezoelectric intelligent aggregate of the embodiment of the invention can be adopted.
In addition, in order to excite and collect stress wave data, the device of the embodiment of the invention further comprises a stress wave emission collecting device (not shown in the figure) and an electric lead 7 connected with the piezoelectric intelligent aggregate sensor 2, wherein the electric lead 7 is connected with the stress wave emission collecting device.
Specifically, elastic substrate 1 can adopt the material of long-life, high elasticity such as rubber, piezoelectric intelligent aggregate sensor 2 use piezoceramics piece PZT as sensing element, use the marble as packaging material. Specifically, the piezoelectric intelligent aggregate sensor 2 is connected with an external NI data acquisition and analysis system 8 (signal excitation acquisition device) through an electrical lead 7. The number of the elastic matrix 1 and the number of the piezoelectric intelligent aggregate sensors 2 are set according to the actual monitoring requirement of the slope model.
When the device for monitoring the sliding of the slope model based on the piezoelectric intelligent aggregate is used, the device for monitoring the sliding of the slope model based on the piezoelectric intelligent aggregate is buried in the slope scale model to be monitored (equivalent to a sliding mass 6) through a drill hole, and penetrates through the sliding surface 3.
When the deep part of the model slope deforms, is unstable and slides, the elastic matrix 1 bends and deforms and is unstable and slides along with the dislocation of the slope sliding surface 4. Due to the stress wave propagation characteristic of the piezoelectric intelligent aggregate, the received stress wave changes along with the change of the stress strain of the elastic matrix. The functional relation between slope deformation, instability, slippage and elastic matrix strain and the functional relation between elastic matrix 1 strain and piezoelectric intelligent aggregate detection stress wave amplitude, energy, mode, wave velocity, propagation path, propagation time and the like are established through mathematics and physical models, and the slope model slippage monitoring can be realized through the signal characteristics of the piezoelectric intelligent aggregates.
Further, as shown in fig. 2, as a specific embodiment of the slope model slippage monitoring device based on piezoelectric intelligent aggregate provided by the present invention, the piezoelectric intelligent aggregate sensor 2 is adhered to two ends of the elastic substrate 1 through epoxy resin glue. Specifically, the elastic matrix 1 is in a long strip cylindrical shape, the diameter of the interface of the elastic matrix 1 is consistent with the size of the piezoelectric intelligent aggregate sensor 2, and the diameter is 25 mm.
Further, as shown in fig. 1, as a specific embodiment of the slope model slippage monitoring device based on the piezoelectric intelligent aggregate provided by the present invention, a plane direction of the piezoelectric intelligent aggregate sensor 2 is perpendicular to a length direction of the elastic base 1, and the piezoelectric intelligent aggregate sensor 2 is adhered to the elastic base 1, so that the piezoelectric intelligent aggregate sensor 2 can better capture deformation and slippage characteristics of the elastic base 1.
Further, as shown in fig. 1, as a specific embodiment of the slope model slippage monitoring device based on the piezoelectric intelligent aggregate provided by the invention, in order to ensure higher stability and lower signal-to-noise ratio of the stress wave signal received by the piezoelectric intelligent aggregate sensor 2, the distance between adjacent piezoelectric intelligent aggregate sensors 2 is not greater than 100 mm.
Further, as shown in fig. 1, as a specific embodiment of the slope model slippage monitoring device based on piezoelectric intelligent aggregate provided by the invention, at least two piezoelectric intelligent aggregate sensors 2 are provided, and more than two piezoelectric intelligent aggregate sensors 2 are adhered and arranged along the length direction of the elastic matrix 1. The number of the elastic substrates 1 should be at least three. The piezoelectric intelligent aggregate sensor 2 is connected with an external signal excitation acquisition device through an electric lead 7 along the length direction of the elastic matrix 1. The piezoelectric intelligent aggregate sensors 2 are arranged at intervals along the length direction of the elastic matrix 1, so that the measurement precision and the measurement range of the monitoring slope model sliding device based on the piezoelectric intelligent aggregate are increased. The quantity of the piezoelectric intelligent aggregate sensors 2 and the quantity of the elastic matrixes 1 can be increased according to the scale of the side slope and the monitoring requirement. Furthermore, two or more groups of monitoring slope model slippage devices based on piezoelectric intelligent aggregate provided by the invention are arranged in the slope model, and each group is independently arranged, so that the encrypted observation and accurate measurement of the slope model slippage can be realized.
Further, as shown in fig. 1, as a specific embodiment of the slope model slippage monitoring device based on piezoelectric intelligent aggregate provided by the invention, the elastic matrix 1 is seamlessly joined with the piezoelectric intelligent aggregate sensor 2, and the side surface of the elastic matrix 1 is flatly adhered to the top surface of the piezoelectric intelligent aggregate sensor 2, so that the monitoring device has a simple structure, is convenient to manufacture, and is also convenient for later analysis and calculation.
Further, as shown in fig. 1, as a specific embodiment of the slope model slippage monitoring device based on the piezoelectric intelligent aggregate provided by the present invention, the elastic substrate 1 may be made of a material with long service life and high elasticity, such as rubber, and the piezoelectric intelligent aggregate sensor 2 uses a piezoelectric ceramic PZT as a sensing element and uses marble as a packaging material.
Correspondingly, the method of the embodiment of the invention comprises the following steps: the mounting step and the monitoring step are specifically analyzed as follows:
the installation step: and drilling a hole on the surface of the sliding slope body 6 to be monitored, wherein the diameter of the drilled hole is about 30mm, so that the device for monitoring the sliding of the slope model based on the piezoelectric intelligent aggregate is installed. Then, cement mortar is used for filling a gap between the device and the wall of the drilled hole, so that the device and the sliding mass 6 form a stressed and deformed whole.
A monitoring step: acquiring an initial signal of the piezoelectric intelligent aggregate sensor 2 by using a stress wave emission acquisition device; when the sliding mass 6 deforms, is unstable and slides along the sliding surface, stress wave monitoring signals are collected, and the sliding deformation condition of the side slope mass is monitored according to the obtained stress wave monitoring data.
As shown in fig. 3, in the monitoring step, when the slope body is slightly deformed, the elastic matrix 1 is subjected to bending deformation under the action of shearing force, and the piezoelectric intelligent aggregate sensor 2 is deviated from the initial position, so that the stress wave signal received by the sensor is attenuated compared with the initial state. Therefore, the sliding condition of the sliding body along the sliding surface can be well monitored.
The invention is further illustrated below by means of specific application examples of the invention.
In this application example, the apparatus of the present invention includes: elastic matrix 1, intelligent aggregate 2 of piezoelectricity, epoxy glue, electric lead 7, signal acquisition emitter (NI data acquisition analytic system 8, the same below).
According to the actual condition of the inner drilling of the sliding mass 6, measuring points with different depths are selected, the number and the intervals of the piezoelectric intelligent aggregate sensors 2 are selected according to the measuring points with different depths, and the piezoelectric intelligent aggregate sensors are adhered to the two ends of the elastic matrix 1 through epoxy resin glue. The monitoring slope model sliding device based on the piezoelectric intelligent aggregate is placed into a drill hole of a slope body. The two piezoelectric intelligent aggregate sensors 2 are respectively positioned at two sides of the sliding surface 3, and the measuring direction of the piezoelectric intelligent aggregate sensors 2 is ensured to be vertical to or intersected with the sliding direction of the sliding mass 6.
And reasonably routing the electric leads of the piezoelectric intelligent aggregate sensor 2 in the placing process, and backfilling the drilled holes by using cement mortar after the arrangement of the inner part of the side slope body is completed. The data line of each piezoelectric intelligent aggregate sensor 2 is connected with a signal acquisition and emission device through an electric lead 7.
After the drilling installation of the device is completed, the primary stress wave data acquisition is carried out by using an active sensing method and is used as an initial signal.
In conclusion, compared with the existing slope slip monitoring technology, the slope model slip monitoring device based on the piezoelectric intelligent aggregate has no size effect aiming at the slope scale model, the length of the elastic matrix 1 and the number of the piezoelectric intelligent aggregate sensors 2 are adjusted according to the burial depth of the slope model slip surface, and distributed monitoring of deformation and unstable slip of the scale slope model is further realized. In addition, the invention also has the characteristics of sensitive sensing, safety, reliability, large measurement range and the like.
It should be noted that the electrical components shown in this document are all electrically connected to an external master controller and 220V mains, and the master controller may be a conventional known device such as a computer for controlling, and the control principle, internal structure, and control switching manner of the device are conventional means in the prior art, and are directly referred to herein without further description. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a device for monitoring soil property side slope slip plane displacement warp which characterized in that: the device comprises an elastic matrix (1), a piezoelectric intelligent aggregate sensor (2), a sliding surface (3), a sliding bed (4), a sliding mass (6), an electric lead (7), an NI data acquisition and analysis system (8), a computer (9) and a piezoelectric ceramic piece (10);
the sliding body (6) is positioned on the sliding surface (3) on one side of the sliding bed (4), an elastic matrix (1) is inserted in the sliding body (6), and one end of the elastic matrix (1) extends to the deep part of the sliding bed (4);
a plurality of piezoelectric intelligent aggregate sensors (2) are arranged in the elastic base body (1), the elastic base body (1) and the piezoelectric intelligent aggregate sensors (2) are adhered through epoxy resin glue, and the piezoelectric intelligent aggregate sensors (2) emit stress waves (5) in the elastic base body (1);
the intelligent piezoelectric aggregate sensor is characterized in that the piezoelectric ceramic piece (10) is installed on the piezoelectric intelligent aggregate sensor (2), the piezoelectric ceramic piece (10) is electrically connected with an external NI data acquisition and analysis system (8) through an electric lead (7), and the NI data acquisition and analysis system (8) is connected with an external computer (9).
2. The device for monitoring displacement deformation of the sliding surface of the soil slope according to claim 1, wherein: the piezoelectric intelligent aggregate sensor (2) is adhered to two ends of the elastic base body (1).
3. The device for monitoring displacement deformation of the sliding surface of the soil slope according to claim 1, wherein: the elastic matrix (1) is a cylinder, the interface size is the same as that of the piezoelectric intelligent aggregate sensor (2), the diameter of the elastic matrix is 25mm, and the length direction of the elastic matrix (1) is parallel to that of the piezoelectric intelligent aggregate sensor (2).
4. The device for monitoring displacement deformation of the sliding surface of the soil slope according to claim 1, wherein: and the distance between the adjacent piezoelectric intelligent aggregate sensors (2) is not more than 100 mm.
5. The device for monitoring displacement deformation of the sliding surface of the soil slope according to claim 1, wherein: the number of the piezoelectric intelligent aggregate sensors (2) is at least two, and more than two piezoelectric intelligent aggregate sensors (2) are adhered along the length direction of the elastic matrix (1); the number of the elastic matrixes (1) is at least three; the piezoelectric intelligent aggregate sensor (2) is connected with a signal transmitting and collecting system sequentially through an electric lead (7) along the length direction of the elastic base body (1).
6. The device for monitoring displacement deformation of the sliding surface of the soil slope according to claim 1, wherein: the elastic base body (1) is a rubber component, and the piezoelectric intelligent aggregate sensor (2) takes a piezoelectric ceramic piece PZT as a sensitive element and takes marble as a packaging material.
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| CN202111078463.6A CN114001686A (en) | 2021-09-15 | 2021-09-15 | Device for monitoring displacement deformation of sliding surface of soil slope |
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| CN202111078463.6A CN114001686A (en) | 2021-09-15 | 2021-09-15 | Device for monitoring displacement deformation of sliding surface of soil slope |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115574702A (en) * | 2022-09-27 | 2023-01-06 | 武汉地震工程研究院有限公司 | Slope slippage monitoring device based on piezoelectric membrane and electromechanical impedance method |
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| CN107504920A (en) * | 2017-06-22 | 2017-12-22 | 石家庄铁道大学 | Side slope model sliding measurement apparatus based on Fibre Optical Sensor |
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| CN102410892A (en) * | 2011-08-05 | 2012-04-11 | 陈洪凯 | Piezoelectric type borehole stress sensor and slope stress monitoring method thereof |
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| CN115574702A (en) * | 2022-09-27 | 2023-01-06 | 武汉地震工程研究院有限公司 | Slope slippage monitoring device based on piezoelectric membrane and electromechanical impedance method |
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