CN105203736A - Multi-parameter monitoring system and method for geotechnical material in landslide area - Google Patents
Multi-parameter monitoring system and method for geotechnical material in landslide area Download PDFInfo
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- CN105203736A CN105203736A CN201510664872.2A CN201510664872A CN105203736A CN 105203736 A CN105203736 A CN 105203736A CN 201510664872 A CN201510664872 A CN 201510664872A CN 105203736 A CN105203736 A CN 105203736A
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Abstract
The invention discloses a multi-parameter monitoring system and method for a geotechnical material in a landslide area. According to the method, a piezoelectric ceramic sensor array is embedded in an area prone to a landslide, by means of the inverse piezoelectric effect of piezoelectric ceramic sensors, voltage is applied to any piezoelectric ceramic sensor, stress waves are generated and emitted to the periphery, then the stress waves are received by the aid of the direct piezoelectric effect of the piezoelectric ceramic sensors, voltage signals can be output, and the modulus of elasticity of soil media can be calculated through the time difference between voltage signal emitting and voltage signal receiving and the arrangement distance; the change of the water content of the soil and whether crack damage happens can be determined through change of the amplitude values of the voltage signals. The property parameters of the geotechnical material in the landslide area can be known in real time, the method can be used for early warning of the landslide, and landslide accidents and casualties are reduced effectively; compared with other monitoring methods, the method is reliable, stable, low in cost and easy to implement and is applicable to engineering in the landslide area with high capacity and wide range.
Description
Technical field
The present invention relates to landslide area rock-soil material parameter monitoring technical field, specifically relate to a kind of landslide area rock-soil material multi-parameter monitoring system and method.
Background technology
Landslide brings serious threat to the life of people and property safety, and the water percentage of landslide area, the elastic modulus of soil property and crack damage are the key parameters whether sign landslide area geology is stablized.
Existing landslide monitoring method comprises four aspects such as surface deformation monitoring, deep soils and groundwater dynamic monitoring and correlative factor monitoring, and existing monitoring method cannot be monitored inner crack of coming down, water percentage, elastic modulus simultaneously.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention proposes a kind of landslide area rock-soil material multi-parameter monitoring system and method, the material property parameters of landslide area ground can be understood in real time, can be used for the early warning occurred of coming down, effectively reduce landslide accident and occur and casualties; Compared with other monitoring method, the method is reliable and stable, and cost is low, easy to implement, is applicable to the engineer applied of the landslide areas of having a large capacity and a wide range.
Technical scheme of the present invention is achieved in that
A kind of landslide area rock-soil material multi-parameter monitoring system, comprise signal acquiring system, signal generator, power amplifier, several sensor encapsulations, sensor encapsulation described in several is embedded at vicinity, potential landslide surface both sides; Described sensor encapsulation comprises encapsulating material and is located at the piezoceramic transducer in described encapsulating material; The piezoceramic transducer chosen successively in sensor encapsulation described in one of them is connected with described power amplifier, described power amplifier is connected with described signal generator, and the piezoceramic transducer in sensor encapsulation described in remaining is connected with described signal acquiring system; Described signal generator can transmit, and apply voltage drive to the piezoceramic transducer of its correspondence after being amplified by this signal by described power amplifier, described signal acquiring system can lead to remaining piezoceramic transducer collection and receive this signal.
As a further improvement on the present invention, the sensitive element of described piezoceramic transducer is piezoelectric ceramic piece; Described encapsulating material comprises the marble slab that two pieces of areas are greater than described piezoelectric ceramic piece, and described piezoelectric ceramic piece is held on the middle part of two pieces of described marble slabs, is filled with epoxy resin between described piezoelectric ceramic piece surrounding, two pieces of marble slabs.
As a further improvement on the present invention, described piezoelectric ceramic piece is square, and area is 1cm
2; Described marble slab is square, and area is 2cm
2, and length breadth ratio is identical with described piezoelectric ceramic piece, thickness is 2mm.
A kind of landslide area rock-soil material multi-parameter monitoring method, comprises the steps:
A. sensor package,
Make several sensor encapsulations, each sensor encapsulation comprises encapsulating material and is located at the piezoceramic transducer in described encapsulating material;
B. the demarcation of sensor,
Choose a piezoceramic transducer to be successively connected with a power amplifier, this power amplifier is connected with a signal generator, is connected by remaining piezoceramic transducer with a signal acquiring system; Signal is produced by signal generator, and after being amplified by this signal by power amplifier, voltage drive is applied to the piezoceramic transducer of its correspondence, by the signal that remaining the piezoceramic transducer collection of signal acquiring system Treatment Analysis receives, set up the relation of ratio along with different soil-structure interactions water percentage, the change of different piezoceramic transducer spacing of signal voltage input and output amplitude;
C. the preferred arrangement of Sensor,
According to soil mechanics ultimate principle, infer potential landslide surface, arrange some described sensor encapsulations in the both sides of this potential landslide surface, form piezoceramic transducer array;
D. signals collecting,
By signal generator and power amplifier, respectively voltage drive is applied to each piezoceramic transducer in piezoceramic transducer array, this signal received by all the other the piezoceramic transducer collections of signal acquiring system Treatment Analysis;
E. the identification of multiparameter,
According to the elastic modulus receiving the density calculation of signal with the mistiming transmitted, transducer spacing and soil-structure interactions and go out the soil body; Ratio and calibration value according to receiving signal and the voltage magnitude that transmits contrast, and draw water percentage and the crack damage situation of the soil body.
As a further improvement on the present invention, the sensitive element of described piezoceramic transducer is piezoelectric ceramic piece; Described encapsulating material comprises the marble slab that two pieces of areas are greater than described piezoelectric ceramic piece, and described piezoelectric ceramic piece is held on the middle part of two pieces of described marble slabs, is filled with epoxy resin between described piezoelectric ceramic piece surrounding, two pieces of marble slabs.
As a further improvement on the present invention, described piezoelectric ceramic piece is square, and area is 1cm
2; Described marble slab is square, and area is 2cm
2, and length breadth ratio is identical with described piezoelectric ceramic piece, thickness is 2mm.
The invention has the beneficial effects as follows: the invention provides a kind of landslide area rock-soil material multi-parameter monitoring system, by several sensor encapsulations being embedded at vicinity, potential landslide surface both sides, the piezoceramic transducer chosen successively in one of them sensor encapsulation is connected with power amplifier, power amplifier is connected with signal generator, and the piezoceramic transducer in remaining sensor encapsulation is connected with signal acquiring system; Like this, transmitted by signal generator, after being amplified by this signal by power amplifier, voltage drive is applied to the piezoceramic transducer of its correspondence, signal acquiring system can receive this signal by remaining piezoceramic transducer collection, and then can calculate the elastic modulus of soil-structure interactions by the transmitting and receiving mistiming of voltage signal and the distance of layout; The change of the water percentage of soil property can be judged by the change of voltage magnitude and whether crack damage occur, therefore, the present invention can solve the problem that single-sensor cannot carry out measuring multiple parameters, the material property parameters of landslide area ground can be understood in real time, can be used for the early warning occurred of coming down, effectively reduce landslide accident and occur and casualties; Form sensor encapsulation by being encapsulated in encapsulating material by piezoceramic transducer, the piezoelectric ceramic piece matter that can solve piezoceramic transducer is crisp, the problem of water proofing property difference.
The invention provides a kind of landslide area rock-soil material multi-parameter monitoring method, by piezoceramic transducer array being embedded in the region that landslide easily occurs, utilize the inverse piezoelectric effect of piezoceramic transducer, voltage is applied to any one piezoceramic transducer, piezoelectric ceramics sector-meeting wherein produces stress wave and launches to surrounding, now recycle the direct piezo electric effect of piezoceramic transducer, namely other piezoceramic transducers are used to receive this stress wave, piezoelectric ceramic piece wherein produces deformation, exportable voltage signal, the elastic modulus of soil-structure interactions can be calculated by the transmitting and receiving mistiming of voltage signal and the distance of layout, the change of the water percentage of soil property can be judged by the change of voltage signal magnitude and whether crack damage occur.Compared with other monitoring method, the method is reliable and stable, and cost is low, easy to implement, is applicable to the engineer applied of the landslide areas of having a large capacity and a wide range.
Accompanying drawing explanation
Fig. 1 is the structural representation of landslide area of the present invention rock-soil material multi-parameter monitoring system;
Fig. 2 is the structural representation of sensor encapsulation in the present invention;
Fig. 3 is the fundamental diagram of landslide area of the present invention rock-soil material multi-parameter monitoring method;
By reference to the accompanying drawings, make the following instructions:
1---signal acquiring system 2---signal generator
3---power amplifier 4---sensor encapsulation
41---encapsulating material 411---marble slab
412---epoxy resin 42---piezoceramic transducer
421---piezoelectric ceramic piece 5---potential landslide surface
6---sliding mass
Embodiment
In order to more clearly understand technology contents of the present invention, describe in detail especially exemplified by following examples, its object is only better understand content of the present invention but not limit the scope of the invention.
As depicted in figs. 1 and 2, a kind of landslide area rock-soil material multi-parameter monitoring system, comprise signal acquiring system 1, signal generator 2, power amplifier 3, several sensor encapsulations 4, sensor encapsulation described in several is embedded at vicinity, potential landslide surface both sides; The piezoceramic transducer 42 that described sensor encapsulation comprises encapsulating material 41 and is located in described encapsulating material; The piezoceramic transducer (transmitting as excitation end) chosen successively in sensor encapsulation described in one of them is connected with described power amplifier, described power amplifier is connected with described signal generator, and the piezoceramic transducer (as receiving end collection signal) in sensor encapsulation described in remaining is connected with described signal acquiring system; Described signal generator can transmit, and apply voltage drive to the piezoceramic transducer of its correspondence after being amplified by this signal by described power amplifier, described signal acquiring system can lead to remaining piezoceramic transducer collection and receive this signal.Like this, by several sensor encapsulations being embedded at vicinity, potential landslide surface both sides, the piezoceramic transducer chosen successively in one of them sensor encapsulation is connected with power amplifier, power amplifier is connected with signal generator, and the piezoceramic transducer in remaining sensor encapsulation is connected with signal acquiring system; Like this, transmitted by signal generator, after being amplified by this signal by power amplifier, voltage drive is applied to the piezoceramic transducer of its correspondence, signal acquiring system can receive this signal by remaining piezoceramic transducer collection, and then can calculate the elastic modulus of soil-structure interactions by the transmitting and receiving mistiming of voltage signal and the distance of layout; The change of the water percentage of soil property can be judged by the change of voltage magnitude and whether crack damage occur, therefore, the present invention can solve the problem that single-sensor cannot carry out measuring multiple parameters, the material property parameters of landslide area ground can be understood in real time, can be used for the early warning occurred of coming down, effectively reduce landslide accident and occur and casualties; Form sensor encapsulation by being encapsulated in encapsulating material by piezoceramic transducer, the piezoelectric ceramic piece matter that can solve piezoceramic transducer is crisp, the problem of water proofing property difference.
Preferably, see Fig. 2, the sensitive element of described piezoceramic transducer is piezoelectric ceramic piece 421; Described encapsulating material comprises the marble slab 411 that two pieces of areas are greater than described piezoelectric ceramic piece, and described piezoelectric ceramic piece is held on the middle part of two pieces of described marble slabs, is filled with epoxy resin 412 between described piezoelectric ceramic piece surrounding, two pieces of marble slabs.Like this, by using two pieces of marble slabs to clamp piezoelectric ceramic piece and electronic circuit, and filling epoxy resin in-between, the encapsulating to piezoelectric ceramic piece can be realized, crisp to solve piezoelectric ceramic piece matter, the problem of water proofing property difference.Wherein, the monitoring principle of piezoelectric ceramic piece is as follows: piezoelectric ceramic piece has positive inverse piezoelectric effect, when applying voltage drive to piezoceramic transducer, piezoelectric ceramics sector-meeting produces deformation, if piezoelectric ceramic piece is positioned in soil-structure interactions, the deformation that piezoelectric ceramic piece produces can be launched to surrounding with the form of stress wave, now recycle the direct piezo electric effect of piezoceramic transducer, namely other piezoelectric ceramic pieces are used to receive this stress wave, piezoelectric ceramic piece produces deformation, output voltage signal, the elastic modulus of soil-structure interactions can be calculated by the transmitting and receiving mistiming of voltage signal and the distance of layout, the change of the water percentage of soil property can be judged by the change of voltage magnitude and whether crack damage occur.
Preferably, described piezoelectric ceramic piece is square, and area is 1cm
2; Described marble slab is square, and area is 2cm
2, and length breadth ratio is identical with described piezoelectric ceramic piece, thickness is 2mm.
As shown in Figure 3, a kind of landslide area rock-soil material multi-parameter monitoring method, comprises the steps:
A. sensor package,
Make several sensor encapsulations, each sensor encapsulation comprises encapsulating material and is located at the piezoceramic transducer in described encapsulating material;
B. the demarcation of sensor,
Choose a piezoceramic transducer to be successively connected with a power amplifier, this power amplifier is connected with a signal generator, is connected by remaining piezoceramic transducer with a signal acquiring system; Signal is produced by signal generator, and after being amplified by this signal by power amplifier, voltage drive is applied to the piezoceramic transducer of its correspondence, by the signal that remaining the piezoceramic transducer collection of signal acquiring system Treatment Analysis receives, set up the relation of ratio along with different soil-structure interactions water percentage, the change of different piezoceramic transducer spacing of signal voltage input and output amplitude;
C. the preferred arrangement of Sensor,
According to soil mechanics ultimate principle, infer potential landslide surface, arrange some described sensor encapsulations in the both sides of this potential landslide surface, form piezoceramic transducer array;
D. signals collecting,
By signal generator and power amplifier, respectively voltage drive is applied to each piezoceramic transducer in piezoceramic transducer array, this signal received by all the other the piezoceramic transducer collections of signal acquiring system Treatment Analysis;
E. the identification of multiparameter,
According to the elastic modulus receiving the density calculation of signal with the mistiming transmitted, transducer spacing and soil-structure interactions and go out the soil body; Ratio and calibration value according to receiving signal and the voltage magnitude that transmits contrast, and draw water percentage and the crack damage situation of the soil body.
The region on landslide is easily there is in landslide area of the present invention rock-soil material multi-parameter monitoring method by being embedded in by piezoceramic transducer array, utilize the inverse piezoelectric effect of piezoceramic transducer, voltage is applied to any one piezoceramic transducer, piezoelectric ceramics sector-meeting wherein produces stress wave and launches to surrounding, now recycle the direct piezo electric effect of piezoceramic transducer, namely other piezoceramic transducers are used to receive this stress wave, piezoelectric ceramic piece wherein produces deformation, exportable voltage signal, the elastic modulus of soil-structure interactions can be calculated by the transmitting and receiving mistiming of voltage signal and the distance of layout, the change of the water percentage of soil property can be judged by the change of voltage signal magnitude and whether crack damage occur.Compared with other monitoring method, the method is reliable and stable, and cost is low, easy to implement, is applicable to the engineer applied of the landslide areas of having a large capacity and a wide range.
Preferably, the sensitive element of described piezoceramic transducer is piezoelectric ceramic piece; Described encapsulating material comprises the marble slab that two pieces of areas are greater than described piezoelectric ceramic piece, and described piezoelectric ceramic piece is held on the middle part of two pieces of described marble slabs, is filled with epoxy resin between described piezoelectric ceramic piece surrounding, two pieces of marble slabs.
Preferably, described piezoelectric ceramic piece is square, and area is 1cm
2; Described marble slab is square, and area is 2cm
2, and length breadth ratio is identical with described piezoelectric ceramic piece, thickness is 2mm.
The principle of work of landslide area of the present invention rock-soil material multi-parameter monitoring method is as follows:
First, according to soil mechanics ultimate principle, infer the position of potential landslide surface 5 and sliding mass 6, at potential landslide surface both sides difference preferred arrangement piezoceramic transducer array, connection signal generator 2 successively, power amplifier 3 and a piezoceramic transducer, signal generator 2 is utilized to transmit, after being amplified by signal by power amplifier 3, voltage drive is applied to this piezoceramic transducer, all the other piezoceramic transducers receive this signal by signal acquiring system 1 collection, set up ratio and the initial aqueous rate of the initialize signal amplitude under soil body normal condition, the funtcional relationship of piezoceramic transducer spacing.Like this, power amplifier 3 is connected with a piezoceramic transducer, transmits as excitation end; All the other all piezoceramic transducers are connected with signal acquiring system 1, as the voltage signal of receiving end collection due to the vibration generation of excitation end.In this process, each piezoceramic transducer is connected with power amplifier as transmitting terminal in turn, and all the other piezoceramic transducers are as receiving end collection signal.The elastic modulus of the soil body can be obtained by the spacing of the mistiming and sensor that receive launching and receiving signal and soil body density calculation, when soil moisture content changes, the comparing initial alignment value and will change of the signal amplitude that the signal amplitude that all the other piezoceramic transducers receive is launched with the piezoceramic transducer chosen, by contrasting with initial alignment value function relation, the changing value of soil moisture content can be obtained.When potential landslide surface produces crack, the amplitude of two piezoceramic transducers of potential landslide surface both sides can have obvious reduction due to the amplitude that exists in crack, can be judged the size in crack by the reduction amplitude receiving voltage signal.
To sum up, the present invention effectively solves the problem that single-sensor cannot carry out measuring multiple parameters, can understand the material property parameters of landslide area ground in real time, can be used for the early warning occurred of coming down, and effectively reduces landslide accident and occurs and casualties; Compared with other monitoring method, the method is reliable and stable, and cost is low, easy to implement, is applicable to the engineer applied of the landslide areas of having a large capacity and a wide range.
Above embodiment is with reference to accompanying drawing, to a preferred embodiment of the present invention will be described in detail.Those skilled in the art by carrying out amendment on various forms or change to above-described embodiment, but when not deviating from essence of the present invention, drops within protection scope of the present invention.
Claims (6)
1. a landslide area rock-soil material multi-parameter monitoring system, it is characterized in that: comprise signal acquiring system (1), signal generator (2), power amplifier (3), several sensor encapsulations (4), sensor encapsulation described in several is embedded at vicinity, potential landslide surface both sides; Described sensor encapsulation comprises encapsulating material (41) and is located at the piezoceramic transducer (42) in described encapsulating material; The piezoceramic transducer chosen successively in sensor encapsulation described in one of them is connected with described power amplifier, described power amplifier is connected with described signal generator, and the piezoceramic transducer in sensor encapsulation described in remaining is connected with described signal acquiring system; Described signal generator can transmit, and apply voltage drive to the piezoceramic transducer of its correspondence after being amplified by this signal by described power amplifier, described signal acquiring system can lead to remaining piezoceramic transducer collection and receive this signal.
2. landslide area according to claim 1 rock-soil material multi-parameter monitoring system, is characterized in that, the sensitive element of described piezoceramic transducer is piezoelectric ceramic piece (421); Described encapsulating material comprises the marble slab (411) that two pieces of areas are greater than described piezoelectric ceramic piece, described piezoelectric ceramic piece is held on the middle part of two pieces of described marble slabs, is filled with epoxy resin (412) between described piezoelectric ceramic piece surrounding, two pieces of marble slabs.
3. landslide area according to claim 2 rock-soil material multi-parameter monitoring system, it is characterized in that, described piezoelectric ceramic piece is square, and area is 1cm
2; Described marble slab is square, and area is 2cm
2, and length breadth ratio is identical with described piezoelectric ceramic piece, thickness is 2mm.
4. a landslide area rock-soil material multi-parameter monitoring method, is characterized in that: comprise the steps:
A. sensor package,
Make several sensor encapsulations, each sensor encapsulation comprises encapsulating material and is located at the piezoceramic transducer in described encapsulating material;
B. the demarcation of sensor,
Choose a piezoceramic transducer to be successively connected with a power amplifier, this power amplifier is connected with a signal generator, is connected by remaining piezoceramic transducer with a signal acquiring system; Signal is produced by signal generator, and after being amplified by this signal by power amplifier, voltage drive is applied to the piezoceramic transducer of its correspondence, by the signal that remaining the piezoceramic transducer collection of signal acquiring system Treatment Analysis receives, set up the relation of ratio along with different soil-structure interactions water percentage, the change of different piezoceramic transducer spacing of signal voltage input and output amplitude;
C. the preferred arrangement of Sensor,
According to soil mechanics ultimate principle, infer potential landslide surface, arrange some described sensor encapsulations in the both sides of this potential landslide surface, form piezoceramic transducer array;
D. signals collecting,
By signal generator and power amplifier, respectively voltage drive is applied to each piezoceramic transducer in piezoceramic transducer array, this signal received by all the other the piezoceramic transducer collections of signal acquiring system Treatment Analysis;
E. the identification of multiparameter,
According to the elastic modulus receiving the density calculation of signal with the mistiming transmitted, transducer spacing and soil-structure interactions and go out the soil body; Ratio and calibration value according to receiving signal and the voltage magnitude that transmits contrast, and draw water percentage and the crack damage situation of the soil body.
5. landslide area according to claim 4 rock-soil material multi-parameter monitoring method, is characterized in that, the sensitive element of described piezoceramic transducer is piezoelectric ceramic piece; Described encapsulating material comprises the marble slab that two pieces of areas are greater than described piezoelectric ceramic piece, and described piezoelectric ceramic piece is held on the middle part of two pieces of described marble slabs, is filled with epoxy resin between described piezoelectric ceramic piece surrounding, two pieces of marble slabs.
6. landslide area according to claim 5 rock-soil material multi-parameter monitoring system, it is characterized in that, described piezoelectric ceramic piece is square, and area is 1cm
2; Described marble slab is square, and area is 2cm
2, and length breadth ratio is identical with described piezoelectric ceramic piece, thickness is 2mm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113356284A (en) * | 2021-06-23 | 2021-09-07 | 中国地质大学（武汉） | Rock slope locking section crack deformation monitoring device and arrangement method |
| CN114001686A (en) * | 2021-09-15 | 2022-02-01 | 湖北震泰建设工程质量检测有限责任公司 | Device for monitoring displacement deformation of sliding surface of soil slope |
| 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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113356284A (en) * | 2021-06-23 | 2021-09-07 | 中国地质大学（武汉） | Rock slope locking section crack deformation monitoring device and arrangement method |
| CN114001686A (en) * | 2021-09-15 | 2022-02-01 | 湖北震泰建设工程质量检测有限责任公司 | Device for monitoring displacement deformation of sliding surface of soil slope |
| 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 |
| CN115574702B (en) * | 2022-09-27 | 2023-09-08 | 武汉地震工程研究院有限公司 | Slope slip monitoring method based on piezoelectric diaphragm and electromechanical impedance method |
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