CN109238883A - The Microseismic monitoring system and micro seismic monitoring and analysis method of runtime concrete gravity dam body crack extension - Google Patents
The Microseismic monitoring system and micro seismic monitoring and analysis method of runtime concrete gravity dam body crack extension Download PDFInfo
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Abstract
The invention discloses a kind of Microseismic monitoring systems of runtime concrete gravity dam body crack extension, including microseismic sensors, data collection system, data processing system and Calculation and analysis system.Its micro seismic monitoring and analysis method include the following steps: that (1) arranges microseismic sensors；(2) establishes dam body space coordinates；(3) edits the equivalent velocity of wave of concrete P wave；(4) provides focus and acquires microseism information, handles and records microseismic event；Dimensional orientation with the ribbon distribution characteristics of microseismic event, as dam concrete crack.It is an object of the invention to: for the problem that runtime concrete gravity dam body crack conventional test methodologies, there are fracture detections to have limitations, provides a kind of Microseismic monitoring system and micro seismic monitoring and analysis method.The present invention is based on On Microseismic Monitoring Techniques, the crack micro seismic monitoring and analytical plan of a kind of three-dimensional " body " form are proposed, to overcome limitation existing for conventional test methodologies.
Description
Technical field
The invention belongs to water conservancy structure safety monitoring technology fields.In particular it relates to a kind of runtime concrete
The Microseismic monitoring system and micro seismic monitoring and analysis method of gravity crack in dam body extension.
Background technique
As economic development is continuously increased energy demand, many large water conservancy hydroelectric engineerings in In Southwest China are successive
It puts into operation.For barrage dam as main structures important in hydraulic and hydroelectric engineering, runtime stability is even more directly to close
It is the success or failure to engineering.Wherein, concrete gravity dam is due to good to landform, geological conditions adaptability, and structure is relatively easy, substantially
Product is conducive to the advantages that mechanized construction, it has also become most widely used one of the dam type of hydraulic and hydroelectric engineering.
For concrete gravity dam, crack is the key reaction of its structure aging and lesion, due to concrete gravity
Dam is often bulky, and the runtime will be influenced by many factors such as temperature, Reservoir Water Level, earthquake, chemical reactions, crack
Origin mechanism is complicated.As time goes by, distress in concrete may further expand, or even form through channel, destroy dam body
Globality and impermeability accelerate the carbonization and corrosion of concrete, seriously endanger the strength and stability of dam structure, influence water conservancy
The normal operation of engineering works.
Currently, crack problem has become one of concrete gravity dam runtime most common disease.Runtime concrete weight
The traditional monitoring mode of power crack in dam body is mainly to be monitored using instruments such as crack gauge, slit gauges to dam body.However, this
A little equipment or method are " point " the form monitoring implemented on concrete dam body surface, and the three-dimensional inside concrete dam body is split
Slit state is then difficult to effectively be captured or detected.
Summary of the invention
It is an object of the invention to: above-mentioned runtime concrete gravity dam body crack conventional test methodologies are directed to, it is existing
Fracture detection there is the problem of limitations, a kind of micro seismic monitoring of runtime concrete gravity dam body crack extension is provided
System and micro seismic monitoring and analysis method.The present invention is based on On Microseismic Monitoring Technique, propose that a kind of crack of three-dimensional " body " form is micro-
Shake monitoring and analytical plan, to overcome limitation existing for conventional test methodologies.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of Microseismic monitoring system of runtime concrete gravity dam body crack extension, including being arranged in corridor in dam
For detecting the microseismic sensors of microseism information, microseismic sensors are connect with the data collection system for acquiring microseism information,
Data collection system connect with the data processing system for handling microseism information, data processing system be used to calculate and analyze
Microseism information is to obtain the Calculation and analysis system connection of fracture spaces Position result.In implementation process, concrete weight is chosen
Potential fractue spacing monolith in power dam operational process, the preferred arrangement multichannel microseismic sensors in corresponding monolith gallery；It establishes
Dam body space coordinates determine sensor space coordinate；Concrete P wave velocity of wave approximate range is determined using live sonic test,
The equivalent velocity of wave of concrete P wave is edited by Knock test；Carry out Reservoir Water Level process inside concrete fracturing features to exist in real time
Line monitoring, obtain microseismic event when, sky, strong information；With microseismic event quantity rising appreciably within certain period and form item
Foundation of the zonal distribution as concrete crack expansion, determines dam concrete fracture spaces orientation and extended characteristics.The program
The crack extension feature of concrete gravity dam body can three-dimensional, be nondestructively monitored, and operate relative ease, it is practical, for
The application range and water conservancy structure safe operation for expanding On Microseismic Monitoring Technique are of great significance.
Preferably, microseismic sensors are arranged in the gallery of different elevations, and the microseism sensing in same gallery
Device arranged for interval makes each microseismic sensors spatially form antarafacial distribution.Ensure to cover the concrete of monolith to be measured, and according to
Monolith region concrete bodies range to be measured suitably encrypts arrangement microseismic sensors in potential fracture development risk large area.
Preferably, microseismic sensors are connect by cable with data collection system, and data collection system passes through net
Line is connect with data processing system, and data processing system and Calculation and analysis system pass through wireless network connection.
Preferably, data processing system setting exists at dam on-site working center, Calculation and analysis system setting
Campsite office calculates and analysis center.
Preferably, dam on-site working is provided centrally with wireless transmitting terminals, and data processing system passes through local area network
It is connect with wireless transmitting terminals, wireless transmitting terminals and Calculation and analysis system pass through wireless network connection.
A kind of micro seismic monitoring and analysis method of the extension of runtime concrete gravity dam body crack, include the following steps:
(1) arranges microseismic sensors in corridor in dam；
(2) establishes dam body space coordinates, and determines microseismic sensors space coordinate；
(3) measures concrete P wave velocity of wave range, and Knock test point is arranged in corridor in dam, implements Knock test with school
Determine the equivalent velocity of wave of concrete P wave；
(4) provides focus in Knock test point, and acquires microseism information in real time by microseismic sensors, handles and records
The microseismic event of monitoring period of time；The ribbon distribution characteristics for being in microseismic event, the space side as dam concrete crack
Position.
Using monolith as zoning monitoring unit, supervised in corresponding monolith interior optimization arrangement multichannel microseismic sensors
It surveys, edits concrete material microseismic signals velocity of wave, the crack being likely to occur inside dam body caused by Reservoir Water Level process is expanded
Real time on-line monitoring is opened up, the seismic source information of concrete rupture is obtained, analyzes the temporal and spatial evolution of microseismic signals, discloses concrete
Gravity dam body fracture orientation feature applies model for expansion On Microseismic Monitoring Technique to take control measure to provide technical support
It encloses and water conservancy structure safe operation is of great significance.
Preferably, in step (1), microseismic sensors are arranged in the gallery of different elevations, and in same gallery
Microseismic sensors arranged for interval, avoid multiple sensors from being located on same straight line or same plane, make each microseismic sensors
Spatially form antarafacial distribution.Ensure to cover the concrete of monolith to be measured, and according to monolith region concrete bodies range to be measured,
Arrangement microseismic sensors are suitably encrypted in potential fracture development risk large area.
Preferably, it in step (2), is built using live significant fixed point or a certain microseismic sensors as coordinate origin
Vertical three-dimensional system of coordinate, and each microseismic sensors three-dimensional coordinate is measured, the space coordinate of note sensor i is (xsi,ysi,zsi)。
Preferably, step (3) is realized by following steps:
(3.1) uses live sonic test to determine concrete P wave velocity of wave range for V1~Vm, in V1~VmBetween interval draw
Divide V1, V2... Vk, Vk+1... VmTotal m different concrete P wave value of wave speed；
(3.2) several Knock test points of arranged for interval in different elevation gallerys, and measure each Knock test point three-dimensional and sit
Mark, the space coordinate of note Knock test point j are (xqj,yqj,zqj)；
(3.3) acquires the shape information of each secondary Knock test in real time, for jth time Knock test, chooses n channel, meter
Calculate microseismic sensors first arrival triggered time average value
(3.4) calculates the difference in each microseismic sensors triggered time and average value
(3.5) is directed to different concrete P wave values of wave speed, calculates Knock test point j to each microseismic sensors propagation time
(3.6) calculates Knock test point j to each microseismic sensors propagation time average value
(3.7) difference of the calculating Knock test point j to each microseismic sensors propagation time and average value
(3.8) constructs objective functionTo m concrete P wave value of wave speed of multiple Knock test
Under fjkIt sums respectively, the smallest concrete P wave velocity of wave of the calculated result, that is, equivalent velocity of wave of concrete P wave.
Preferably, in step (4), microseismic event is analyzed in real time, with microseismic event quantity continuously not
Propagation direction with the increase feature of period, as dam concrete fracture spaces orientation.Existing detection scheme can not fracture
Extension is predicted, to have time-lag effect；And this programme passes through the distribution situation of analysis microseismic event, it can be to coagulation
The evolution trend of soil cracking seam is differentiated and is predicted.
In conclusion by adopting the above-described technical solution, compared with the prior art, the beneficial effects of the present invention are: this
Invention is it is intended that the extension of runtime concrete gravity dam crack provides a kind of new monitoring and analytical plan, realization distress in concrete
The three dimensional lossless of extension trend monitors and differentiates.On Microseismic Monitoring Technique is introduced into the extension of runtime concrete gravity dam body crack
Monitoring and analysis, have expanded the application range of On Microseismic Monitoring Technique.This programme can disclose distress in concrete from three-dimensional perspective
Breed and evolutionary process, fracture extension trend is differentiated and is predicted, breach traditional " point " form monitoring limitation and
Hysteresis quality is conducive to timely, effective assessment of water conservancy structure safety.In time, effectively monitor and handle crack extension
The problem of bringing provides safeguard for the normal operation of hydraulic engineering.
Detailed description of the invention
Fig. 1 is monitoring monolith structure chart: (a) oblique view, (b) sectional view.
Fig. 2 is microseismic sensors space layout figure.
Fig. 3 is Microseismic monitoring system network topology structure.
Microseismic event Annual distribution during Fig. 4 is monitoring.
Fig. 5 is 6~8 weeks spatial distributions of microseismic event: (a) oblique view, (b) front view, (c) top view.(sphere represents micro-
Shake event).
Fig. 6~8 are 6~8 weeks spatial evolution processes of microseismic event: (Fig. 6) the 6th week, (Fig. 7) the 7th week, (Fig. 8) the 8th week.
(sphere represents microseismic event, and i, ii, iii are respectively oblique view, front view, top view).
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Present embodiment discloses a kind of Microseismic monitoring system of runtime concrete gravity dam body crack extension, micro seismic monitorings
System network topology as shown in figure 3, include be arranged in corridor in dam for detecting the microseismic sensors of microseism information,
Microseismic sensors connects with the data collection system for acquiring microseism information, data collection system be used to handle microseism information
Data processing system connection, data processing system connect with being used to calculating and analyzing the Calculation and analysis system of microseism information,
To obtain crack in dam body dimensional orientation result.
Microseismic sensors are arranged in the gallery of different elevations, and the microseismic sensors arranged for interval in same gallery, are made
Each microseismic sensors spatially form antarafacial distribution.Microseismic sensors are connected by three-core shielding cable and data collection system
It connects, data collection system is connect by cable with data processing system, and data processing system and Calculation and analysis system pass through nothing
Line network connection.Data processing system setting is arranged in dam on-site working center, Calculation and analysis system in campsite office
Calculating and analysis center.Dam on-site working is provided centrally with wireless transmitting terminals, and data processing system is by local area network and wirelessly
Transmitting terminal connection, wireless transmitting terminals and Calculation and analysis system pass through wireless network connection.
The present embodiment also discloses the micro seismic monitoring and analysis method of a kind of runtime concrete gravity dam body crack extension,
Include the following steps:
(1) arranges microseismic sensors in corridor in dam；
(2) establishes dam body space coordinates, and determines microseismic sensors space coordinate；
(3) measures concrete P wave velocity of wave range, and Knock test point is arranged in corridor in dam, implements Knock test with school
Determine the equivalent velocity of wave of concrete P wave；
(4) provides focus in Knock test point, and acquires microseism information in real time by microseismic sensors, handles and records
The microseismic event of monitoring period of time；The ribbon distribution characteristics for being in microseismic event, the space side as dam concrete crack
Position.
In step (1), microseismic sensors are arranged in the gallery of different elevations, and between the microseismic sensors in same gallery
Every arrangement, each microseismic sensors is made spatially to form antarafacial distribution.
In step (2), three-dimensional system of coordinate is established using live significant fixed point or a certain microseismic sensors as coordinate origin,
And each microseismic sensors three-dimensional coordinate is measured, the space coordinate of note sensor i is (xsi,ysi,zsi)。
Step (3) is realized by following steps:
(3.1) uses live sonic test to determine concrete P wave velocity of wave range for V1~Vm, in V1~VmBetween interval draw
Divide V1, V2... Vk, Vk+1... VmTotal m different concrete P wave value of wave speed；
(3.2) several Knock test points of arranged for interval in different elevation gallerys, and measure each Knock test point three-dimensional and sit
Mark, the space coordinate of note Knock test point j are (xqj,yqj,zqj)；
(3.3) acquires the shape information of each secondary Knock test in real time, for jth time Knock test, chooses n channel, meter
Calculate microseismic sensors first arrival triggered time average value
(3.4) calculates the difference in each microseismic sensors triggered time and average value
(3.5) is directed to different concrete P wave values of wave speed, calculates Knock test point j to each microseismic sensors propagation time
(3.6) calculates Knock test point j to each microseismic sensors propagation time average value
(3.7) difference of the calculating Knock test point j to each microseismic sensors propagation time and average value
(3.8) constructs objective functionTo m concrete P wave value of wave speed of multiple Knock test
Under fjkIt sums respectively, the smallest concrete P wave velocity of wave of the calculated result, that is, equivalent velocity of wave of concrete P wave.
In step (4), microseismic event is analyzed in real time, with microseismic event quantity continuous different periods quick increasing
Add feature, the propagation direction as dam concrete fracture spaces orientation.
In conjunction with concrete gravity dam construction time situation and runtime infiltration measure feature, the present embodiment chooses a representative monolith
Carry out crack extension monitoring and analysis.The monolith section pattern, structure size and elevation are as shown in Figure 1, wherein monolith width
25.0m, height of dam 129.0m, width at dam crest 20.0m, dam bottom width degree 90.0m.Gallery section pattern is gateway opening shape, having a size of 4.0
× 4.0m, gallery are respectively arranged in tetra- elevations of 5.0m, 15.0m, 55.0m and 90.0m.
As shown in Fig. 2, being total to 8 microseism acceleration type sensors of preferred arrangement in four different elevation gallerys, frequency is rung
Answer range not less than 50Hz~2000Hz, every elevation gallery arranges 2, respectively number S1, S2 ... S8.Microseismic sensors arrangement
In gallery mounting hole, mounting hole aperture is not less than 40mm, and hole depth is not less than 2.0m, and angle is not less than 30 ° obliquely, same height
10~30m of adjacent sensors spacing in journey gallery.And arrangement is suitably encrypted in crack risk large area, it avoids as far as possible multiple
Sensor is located on same straight line or same plane, and multiple sensors form the distribution of space antarafacial, it is ensured that cover monolith to be measured
Concrete.
Left side endpoint is called in person as coordinate origin using this monolith dam, establishes three-dimensional system of coordinate, is measured each microseismic sensors space and is sat
Mark connects as shown in table 1 below and debugs the operation of microseism positioning system.
Table 1- microseismic sensors space coordinate
In the middle part of 5.0m, 15.0m elevation gallery and in the middle part of 55.0m, 90.0m elevation gallery and a water is respectively arranged in side
Even tone wave hole, hole depth 3m measure the average P wave velocity of wave of each drilling, and to surveyed minimum, the average P wave value of wave speed of highest drilling
Vmin、Vmax100m/s is respectively reduced and increased, is denoted as V respectively1And Vm, thereby determine that concrete P wave velocity of wave approximate range is V1~
Vm, in V1~VmBetween using 20~50m/s as interval divide V1、V2…VmTotal m different value of wave speed.
2 Knock test points are arranged in the middle part of every gallery and side, amount to 8, respectively number Q1, Q2 ... Q8, measurement
The space coordinate of Knock test point, as shown in table 2 below.
Table 2- Knock test space of points coordinate
It is to numberQjKnock test point calculating be analyzed as follows:
According to this Knock test shape information collected, the preferable channel of n waveform is chosen, calculates and participates in positioning biography
Sensor triggered time (first arrival) average valueObtain the difference of each sensor-triggered time and average value
Calculate separately different concrete P wave velocity of wave VkLower beating point is to each sensor propagation timeFocus is acquired to each sensor propagation time average value
Calculate different concrete P wave velocity of wave VkDifference of the lower beating point to each sensor propagation time and average valueIt seeks
F when as shown in table 3, to 8 Knock tests under each P wave value of wave speedjkSummation, i.e.,It is corresponded to
In velocity of wave V1, V2... Vk, Vk+1... VmUnder fkValue, f=min { f1,f2,…fk,fk+1…,fmWhen concrete P wave value of wave speed
The as equivalent P wave velocity of wave of micro seismic monitoring.
Table 3- Knock test measures concrete P wave velocity of wave
Note: the corresponding concrete P wave value of wave speed of f is the equivalent P wave velocity of wave of Microseismic monitoring system.
In the present embodiment, concrete gravity dam monitors the Annual distribution of monolith microseismic event as shown in figure 4, microseismic event number
Amount is relatively fewer at the 1st~5 week, and obviously increases at the 6th~8 week.Spatial distribution such as Fig. 5 institute of the microseismic event at 6~8 weeks
Show, microseismic event forms ribbon from top to bottom from upstream to downstream inside dam body and is distributed, deducibility dam body inner concrete
Crack occurs in the region.
In the present embodiment, microseismic event the 6th~8 week cumulative distribution feature as can be seen from figures 6 to 8, Fig. 6 sphere represents
6 weeks microseismic events, Fig. 7 represent the 7th week microseismic event relative to the increased sphere of Fig. 6, and Fig. 8 is relative to Fig. 7 increased sphere generation
The 8th week microseismic event of table.By the space coordinate of microseismic event it is found that over time, distress in concrete is attached in Z-direction 15m
From dam body upstream side elevation 40m, X to 20m near zone, downstream elevation 30m, X constantly expands to 45m near zone near field
Exhibition.Therefore, the monolith be located at Z-direction 15m, downstream side elevation 30m, X to region near 45m be distress in concrete pay close attention to and
Prevention and control region.
In addition, On Microseismic Monitoring Technique is inside fragile material specifically, when there is crack, by installing in effective range
Sensor can receive the elastic wave information of rupture, carry out processing analysis to elastic wave information, can Inversion Calculation go out microseism thing
The focal shock parameters information such as time, spatial position, the energy of part (rupture).It, can by analyzing the spatio-temporal activity rule of microseismic event
Infer the evolution Feature of rupture, disclose crack and potentially extend trend, to control or avoid the generation of peril.Currently,
On Microseismic Monitoring Technique is well used and promotes in engineering rock mass estimation of stability, and concrete works apply compared with
It is few.On Microseismic Monitoring Technique as a kind of three-dimensional " body " monitoring method, can real time on-line monitoring concrete microseism information, disclose mixed
The solidifying internal micro rupture of soil germinates, develops, expansion process, breaches the monitoring of traditional monitoring technology " point " form and crack propagation develops
Trend discrimination, the space-time limitation of prediction, new idea and method is provided for the safety evaluation of concrete dam body runtime.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of Microseismic monitoring system of runtime concrete gravity dam body crack extension, it is characterised in that: including being arranged on dam
The microseismic sensors for being used to detect microseism information in body gallery, microseismic sensors are acquired with the data for acquiring microseism information
System connection, data collection system are connect with being used to handle the data processing system of microseism information, data processing system be used for
It calculates and is connect with analysis microseism information with the Calculation and analysis system for obtaining fracture spaces Position result.
2. the Microseismic monitoring system of runtime concrete gravity dam body crack extension according to claim 1, feature exist
In: microseismic sensors are arranged in the gallery of different elevations, and the microseismic sensors arranged for interval in same gallery, make each microseism
Sensor spatially forms antarafacial distribution.
3. the Microseismic monitoring system of runtime concrete gravity dam body crack extension according to claim 1, feature exist
In: microseismic sensors are connect by cable with data collection system, and data collection system is connected by cable and data processing system
It connects, data processing system and Calculation and analysis system pass through wireless network connection.
4. the Microseismic monitoring system of runtime concrete gravity dam body crack extension according to claim 3, feature exist
In: data processing system setting calculates and divides in campsite office in dam on-site working center, Calculation and analysis system setting
Analysis center.
5. the Microseismic monitoring system of runtime concrete gravity dam body crack extension according to claim 4, feature exist
In: dam on-site working is provided centrally with wireless transmitting terminals, and data processing system is connect by local area network with wireless transmitting terminals, nothing
Line transmitting terminal and Calculation and analysis system pass through wireless network connection.
6. a kind of micro seismic monitoring and analysis method of the extension of runtime concrete gravity dam body crack, which is characterized in that including such as
Lower step:
(1) arranges microseismic sensors in corridor in dam；
(2) establishes dam body space coordinates, and determines microseismic sensors space coordinate；
(3) measures concrete P wave velocity of wave range, and Knock test point is arranged in corridor in dam, and it is mixed to edit to implement Knock test
The solidifying equivalent velocity of wave of soil P wave；
(4) provides focus in Knock test point, and acquires microseism information in real time by microseismic sensors, handles and records monitoring
The microseismic event of period；The ribbon distribution characteristics for being in microseismic event, the dimensional orientation as dam concrete crack.
7. the micro seismic monitoring and analysis method of runtime concrete gravity dam body crack extension according to claim 6,
Be characterized in that: in step (1), microseismic sensors are arranged in the gallery of different elevations, and the microseismic sensors in same gallery
Arranged for interval makes each microseismic sensors spatially form antarafacial distribution.
8. the micro seismic monitoring and analysis method of runtime concrete gravity dam body crack extension according to claim 7,
It is characterized in that: in step (2), establishing three-dimensional coordinate using live significant fixed point or a certain microseismic sensors as coordinate origin
System, and each microseismic sensors three-dimensional coordinate is measured, the space coordinate of note sensor i is (xsi,ysi,zsi)。
9. the micro seismic monitoring and analysis method of runtime concrete gravity dam body crack extension according to claim 8,
It is characterized in that, step (3) is realized by following steps:
(3.1) uses live sonic test to determine concrete P wave velocity of wave range for V1~Vm, in V1~VmBetween interval divide V1,
V2... Vk, Vk+1... VmTotal m different concrete P wave value of wave speed；
(3.2) several Knock test points of arranged for interval in different elevation gallerys, and each Knock test point three-dimensional coordinate is measured,
The space coordinate for remembering Knock test point j is (xqj,yqj,zqj)；
(3.3) acquires the shape information of each secondary Knock test in real time, for jth time Knock test, chooses n channel, calculates micro-
Shake sensor first arrival triggered time average value
(3.4) calculates the difference in each microseismic sensors triggered time and average value
(3.5) is directed to different concrete P wave values of wave speed, calculates Knock test point j to each microseismic sensors propagation time
(3.6) calculates Knock test point j to each microseismic sensors propagation time average value
(3.7) difference of the calculating Knock test point j to each microseismic sensors propagation time and average value
(3.8) constructs objective functionTo under m concrete P wave value of wave speed of multiple Knock test
fjkIt sums respectively, the smallest concrete P wave velocity of wave of the calculated result, that is, equivalent velocity of wave of concrete P wave.
10. the micro seismic monitoring and analysis method of runtime concrete gravity dam body crack extension according to claim 9,
Be characterized in that: in step (4), microseismic event being analyzed in real time, with microseismic event quantity continuous different periods increase
Feature, the propagation direction as dam concrete fracture spaces orientation.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946735A (en) * | 2021-02-23 | 2021-06-11 | 石家庄铁道大学 | Rockfall impact positioning method and device based on micro-seismic monitoring system |
| CN114935513A (en) * | 2022-07-26 | 2022-08-23 | 四川中水成勘院工程物探检测有限公司 | Method for predicting generation and expansion of concrete dam body crack based on microseismic signal characteristics |
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| CN112946735B (en) * | 2021-02-23 | 2023-03-31 | 石家庄铁道大学 | Rockfall impact positioning method and device based on micro-seismic monitoring system |
| CN114935513A (en) * | 2022-07-26 | 2022-08-23 | 四川中水成勘院工程物探检测有限公司 | Method for predicting generation and expansion of concrete dam body crack based on microseismic signal characteristics |
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