CN212845971U - Earth and rockfill dam time domain electric field monitoring devices - Google Patents
Earth and rockfill dam time domain electric field monitoring devices Download PDFInfo
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- CN212845971U CN212845971U CN202021984275.0U CN202021984275U CN212845971U CN 212845971 U CN212845971 U CN 212845971U CN 202021984275 U CN202021984275 U CN 202021984275U CN 212845971 U CN212845971 U CN 212845971U
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- 230000005684 electric field Effects 0.000 title claims abstract description 37
- 238000012806 monitoring device Methods 0.000 title claims abstract description 25
- 238000005553 drilling Methods 0.000 claims abstract description 42
- 238000004891 communication Methods 0.000 claims abstract description 38
- 238000012545 processing Methods 0.000 claims abstract description 32
- 238000012544 monitoring process Methods 0.000 claims abstract description 28
- 238000010291 electrical method Methods 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 12
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- 230000007774 longterm Effects 0.000 claims description 3
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- 230000002093 peripheral effect Effects 0.000 description 2
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Abstract
The utility model provides an earth and rockfill dam time domain electric field monitoring devices belongs to the real-time supervision technical field of earth and rockfill dam seepage safety problem, monitoring devices includes communication cable, drilling electrode, integration electric method host computer, data acquisition and processing platform etc. and earth and rockfill dam electric information spreads into the communication cable input into through the drilling cable, reaches integration electric method host computer by its output again, finally reaches data acquisition and processing platform. The precise imaging method comprises data observation and data inversion imaging; the utility model discloses monitoring system utilizes horizontal and vertical, time direction three-dimensional dynamic observation overall arrangement, combines the porous survey line joint observation method of dam body, can realize real-time accurate formation of image of ground electric field, helps earth and rockfill dam complete coverage formula monitoring, once lays, and the life cycle is long, can obtain massive data than traditional method; the utility model discloses observation system application time lapse electric method technique can realize monitoring and detect integration technical breakthrough in the normalized monitoring of earth and rockfill dam.
Description
Technical Field
The utility model relates to an earth and rockfill dam seepage safety problem's real-time supervision technical field specifically is an earth and rockfill dam time domain electric field monitoring devices.
Background
Before the 80 th of the 20 th century, the earth-rock dam is limited by the dam construction technology, and is formed by layering and rolling and layer-by-layer thickening in the construction process of a large number of small and hilly reservoirs. As the time is long, the leakage probability of the constructed earth-rock dam is high, and a large number of earth-rock dam reservoirs have leakage hidden dangers of different degrees, serious safety threats are faced in the flood season. The reservoir dam leakage monitoring work in China is lack of normalization, real-time monitoring projects aiming at reservoir dam leakage are few, and reservoir dam leakage is often detected and monitored only when leakage occurs. Compared with other exploration means, the electrical prospecting method has the advantages of high-efficiency underground water flow direction detection, small interference, high speed, strong consistency, economical and convenient consumables and the like, and is widely applied to reservoir dam leakage detection. In the prior art, the detection of the leakage in the middle of the dam body is mainly focused, the leakage detection of the dam foundation and the dam abutment has large limitation, a certain error exists in the detection depth, and the measurement data amount is relatively small, so that the prior art is difficult to accurately identify the leakage hidden danger position of the reservoir dam, and further brings certain influence on the safe and accurate enforcement of a water conservancy management department.
In view of the above, the applicant has made a special study on earth and rockfill dam ground electric field distribution characteristics, and has determined that the resistivity and the polarizability in the horizontal and vertical directions are both continuous, and the resistivity has a gradual change in the vertical direction, and the spatial distribution characteristics of leakage hidden danger can be determined according to the resistivity and the difference in polarizability between a seepage weak region and a surrounding dam body, so as to provide an earth and rockfill dam time domain electric field monitoring device, which is produced by the above.
Disclosure of Invention
Problem to the prior art existence of method, the utility model provides an earth and rockfill dam time domain electric field monitoring devices realizes further accurate seepage hidden danger position of judging to reservoir dam earth electric field's real-time supervision and accurate formation of image to provide the technical basis for reservoir dam safety. In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses in earth and rockfill dam time domain electric field monitoring devices include communication cable, drilling electrode, integration electric method host computer, server, data wireless transmission basic station, satellite communication platform and data acquisition and processing platform. Earth and rockfill dam earth electricity information is transmitted into the input end of the communication cable through the drilling cable with the drilling electrode, then transmitted to the input end of the integrated electrical method host machine through the output end of the communication cable, transmitted to the server and the data wireless transmission base station through the output end of the integrated electrical method host machine, and finally transmitted back to the data acquisition and processing platform through the satellite communication platform, and finally real-time monitoring and detection of earth and rockfill dam leakage are achieved.
Preferably, the integrated electrical method host comprises a power module, a parameter setting module, a time domain electric field excitation module, a time domain electric field acquisition module and a data transmission module;
preferably, the data acquisition and processing platform is connected with the server, and then the data wireless transmission base station and the satellite communication platform are used for carrying out parameter setting and data acquisition command input operation on the integrated electrical method host, so that the monitoring device is ensured to realize long-term real-time monitoring after being arranged once.
Preferably, the drilling electrode is a weakly polarized or unpolarized electrode having a cylindrical shape and a length of 10 cm.
An earth and rockfill dam time domain electric field monitoring device comprises data observation and data inversion imaging;
a. the data observation comprises the following steps:
(1) and collecting geological and construction data of the earth-rock dam, mastering the burial depth of the dam foundation and the axial length of the dam top, designing the number of the drilled holes and the drilling depth, and designing the number of the electrodes of each drilled hole according to the drilling depth. The spacing between adjacent drill holes is controlled to be less than or equal to 30m, and the depth of the drill holes is controlled to be less than or equal to 1.5 times of the dam foundation burial depth; the distance between the electrodes of adjacent drill holes is less than or equal to 2m, and is generally 1 m;
(2) customizing corresponding drilling cables, drilling electrodes and communication cables according to the design requirements of the step (1), and performing vertical drilling on the dam crest along the axis;
(3) placing the drilling cable and the drilling electrode customized in the step (2) into the drilling hole constructed in the step (2) according to the corresponding sequence, and grouting and sealing each drilling hole to realize the full coupling of the electrode and the earth-rock dam;
(4) connecting a communication cable with each drilling cable, guiding the communication cable to one side of the dam crest to be connected with the integrated electrical method host, and fixing the integrated electrical method host or guiding the integrated electrical method host to be fixed in a peripheral chamber; connecting the integrated electrical method host to a server, and connecting the server with a data wireless transmission base station;
(5) a data acquisition and processing platform is installed in a safety monitoring center of a water conservancy department and is connected with a data wireless transmission base station; based on the satellite communication platform, the data acquisition and processing platform and the server are subjected to communication debugging, and real-time communication between the data acquisition and processing platform and the server is ensured;
(6) numbering the drill holes in the data acquisition and processing platform, wherein the drill holes far away from the integrated electrical method host machine are numbered as No. 1 drill holes, and the numbers of other drill holes which are continuously close to the electrical method host machine are sequentially increased by 1;
(7) the data acquisition and processing platform is used for sending data acquisition instructions (including parameters such as drilling acquisition sequence, data acquisition interval time, power supply square waves and power supply time) to the server through the data wireless transmission base station and the satellite communication platform, and the server synchronously sends the acquisition instructions to the integrated electrical method host;
(8) after receiving an acquisition instruction, the integrated electrical method host acquires a primary electric field and a secondary electric field in each drill hole according to the instruction parameter requirement to obtain apparent resistivity and apparent polarizability profile data; acquiring a cross-hole primary perspective electric field and a cross-hole secondary perspective electric field aiming at two adjacent drill holes to obtain cross-hole apparent resistivity and apparent polarizability data;
(9) actively transmitting the acquired data back to the data acquisition and processing platform through the data wireless transmission base station and the satellite communication platform after the data acquisition is finished;
b. the data inversion imaging comprises the following steps:
(10) establishing a uniform rectangular coordinate system according to the axial length of the dam crest, the position and the depth of a drilling plane and the position of each drilling electrode;
(11) performing system decomposition on actually measured apparent resistivity and apparent polarizability data, giving spatial rectangular coordinates, establishing a data inversion area, forming a format file required by a data acquisition and processing platform, and substituting the format file into the data acquisition and processing platform to perform resistivity and polarizability inversion;
(12) extracting resistivity and polarizability data in the inversion region, performing data statistics to obtain a relatively low resistivity and high polarizability abnormal region, and performing real-time display and expression on a data acquisition and processing platform;
(13) dynamic early warning of the hidden leakage danger of the earth and rockfill dam is realized by contrastively analyzing resistivity and polarizability profiles acquired and inverted at different moments;
preferably, in the step (8), the apparent resistivity and the apparent polarizability data inside a single borehole and the cross-hole apparent resistivity and the apparent polarizability data between two adjacent boreholes may be collected by selecting a dipolar device, a tripolar device, a quadrapole device and the like, and generally selecting a tripolar device;
preferably, in the step (11), the resistivity and the polarizability are inverted by two-dimensionally meshing the detection region, calculating the resistivity and the polarizability in each mesh, and using a smooth constrained least squares inversion algorithm, where the inversion objective function of the resistivity and the polarizability is:
(GTG+λCTC)Δm＝GTΔd
in the formula, Δ d is observed data d and forward theoretical calculation value d0The residual vector between; g is a coefficient matrix; Δ m is a modified vector of the initial model m, and C is a model smooth matrix; λ is a smooth damping factor;
the utility model discloses following beneficial effect has:
(1) the utility model discloses well monitoring devices has proposed the observation point distribution structure of carrying out real-time supervision and location to earth and rockfill dam seepage position based on earth and rockfill dam inner structure, seepage earth electric field, monitoring accuracy and monitoring real-time, has formed horizontal, vertical, the dynamic observation overall arrangement of time direction, has realized effective coverage to the observation of earth and rockfill dam earth electric field distribution law, has solved the problem that electric exploration has the blind area among the traditional earth and rockfill dam monitoring devices, and can effectively detect the dam shoulder and around the seepage condition of dam position;
(2) the utility model discloses monitoring devices passes through the method that the porous survey line of dam body jointly surveyed, can obtain the distribution rule of ground electric field time shift, can accomplish effectual real-time supervision to the seepage of dam foundation, dam body, has realized the seepage monitoring to earth and rockfill dam is whole, has improved the problem that traditional electric method monitoring system has the monitoring blind area to dam abutment and around the dam, has guaranteed systematic, representativeness, reliability, the real-time of earth and rockfill dam seepage's ground electric field change rule observation achievement;
(3) the utility model discloses monitoring devices once lay, and the life cycle is long, and because of its special electrode layout mode makes the measured data that obtains more than the traditional electrical prospecting dozens of times, and mass data is favorable to going on the inversion mapping explanation to the electrical observation data to the accuracy that earth and rockfill dam seepage detected has greatly been improved;
(4) the utility model discloses observation device is applied to earth and rockfill dam's normalized monitoring work with time lapse electric method technique, when monitoring devices full-automatic acquisition, the host computer can return data acquisition and processing platform with gathering data in real time, and form the unusual section view of ground electric field, thereby help monitoring personnel in time to discover earth and rockfill dam seepage condition, and lock infiltration weak area effectively, the monitoring and the detection integration of earth and rockfill dam seepage have been realized, dam body prevention of seepage work for the later stage provides reliable technical guarantee.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is the schematic view of the monitoring device of the middle dam body of the utility model.
Description of the labeling: the method comprises the following steps of 1-communication cable, 2-drilling cable, 3-drilling electrode, 4-dam body, 5-side rock mass, 6-dam foundation, 7-integrated electrical method host, 8-server, 9-data wireless transmission base station, 10-satellite communication platform, 11-data acquisition and processing platform, 12-dam crest axis and 13-drilling.
Detailed Description
In order to make the technical means and the technical effects achieved by the present invention can be more clearly and more perfectly disclosed, the following detailed description is made with reference to the accompanying drawings:
the utility model provides an earth and rockfill dam time domain electric field monitoring devices, as the data observation device of implementing dam seepage dynamic monitoring, specifically as follows:
as shown in fig. 1, fig. 1 is a perspective view of a field structure of an earth and rockfill dam time-domain electric field monitoring device, which comprises a communication cable 1, a drilling cable 2, a drilling electrode 3, a dam body 4, a side rock body 5, a dam foundation 6 and an integrated electric method host 7, the earth and rockfill dam leakage monitoring system comprises a server 8, a data wireless transmission base station 9, a satellite communication platform 10, a data acquisition and processing platform 11, a dam crest axis 12 and a drill hole 13, earth and rockfill dam earth electricity information is transmitted into the input end of the communication cable 1 through the drill hole cable 2 with the drill hole electrode 3, then is transmitted to the input end of an integrated electricity method host 7 through the output end of the communication cable, then is transmitted to the server 8 and the data wireless transmission base station 9 through the output end of the integrated electricity method host 1, finally, acquired data are transmitted back to the data acquisition and processing platform 11 through the satellite communication platform 10, and finally real-time monitoring and detection of earth and.
The utility model discloses among the earth and rockfill dam time domain electric field monitoring devices, drilling electrode 3 is cylindric and length for 10 cm's weak polarization or non-polarizing electrode. The integrated electrical method host 7 comprises a power supply module, a parameter setting module, a time domain electromagnetic excitation module, a time domain electric field acquisition module and a data transmission module. When the data acquisition and processing platform 11 works, the server is connected firstly, and then the integrated electrical method host 7 is subjected to parameter setting and data acquisition command input operation through the data wireless transmission base station 9 and the satellite communication platform 10, so that the monitoring device is ensured to realize long-term real-time monitoring after being arranged once.
The utility model discloses observation device still is applied to the normalized monitoring work of earth and rockfill dam with time lapse electric method technique, when monitoring devices full-automatic acquisition, the host computer can return data acquisition and processing platform 11 in real time, and form the unusual section view of ground electric field, thereby help monitoring personnel in time to discover the earth and rockfill dam seepage condition, and lock the infiltration weak spot effectively, the monitoring and the detection integration of earth and rockfill dam seepage have been realized, dam body prevention of seepage work in the later stage provides reliable technical guarantee.
An earth and rockfill dam time domain electric field monitoring device comprises data observation and data inversion imaging; the method comprises the following specific steps:
a. the data observation comprises the following steps:
(1) and collecting geological and construction data of the earth-rock dam, mastering the burial depth of the dam foundation and the axial length of the dam top, designing the number of the drilled holes and the drilling depth, and designing the number of the electrodes of each drilled hole according to the drilling depth. The spacing between adjacent drill holes is controlled to be less than or equal to 30m, and the depth of the drill holes is controlled to be less than or equal to 1.5 times of the dam foundation burial depth; the distance between the electrodes of adjacent drill holes is less than or equal to 2m, and is generally 1 m;
(2) customizing corresponding drilling cables, drilling electrodes and communication cables according to the design requirements of the step (1), and performing vertical drilling on the dam crest along the axis;
(3) placing the drilling cable and the drilling electrode customized in the step (2) into the drilling hole constructed in the step (2) according to the corresponding sequence, and grouting and sealing each drilling hole to realize the full coupling of the electrode and the earth-rock dam;
(4) connecting a communication cable with each drilling cable, guiding the communication cable to one side of the dam crest to be connected with the integrated electrical method host, and fixing the integrated electrical method host or guiding the integrated electrical method host to be fixed in a peripheral chamber; connecting the integrated electrical method host to a server, and connecting the server with a data wireless transmission base station;
(5) a data acquisition and processing platform is installed in a safety monitoring center of a water conservancy department and is connected with a data wireless transmission base station; based on the satellite communication platform, the data acquisition and processing platform and the server are subjected to communication debugging, and real-time communication between the data acquisition and processing platform and the server is ensured;
(6) numbering the drill holes in the data acquisition and processing platform, wherein the drill holes far away from the integrated electrical method host machine are numbered as No. 1 drill holes, and the numbers of other drill holes which are continuously close to the electrical method host machine are sequentially increased by 1;
(7) the data acquisition and processing platform is used for sending data acquisition instructions (including parameters such as drilling acquisition sequence, data acquisition interval time, power supply square waves and power supply time) to the server through the data wireless transmission base station and the satellite communication platform, and the server synchronously sends the acquisition instructions to the integrated electrical method host;
(8) after receiving an acquisition instruction, the integrated electrical method host acquires a primary electric field and a secondary electric field in each drill hole according to the instruction parameter requirement to obtain apparent resistivity and apparent polarizability profile data; acquiring a cross-hole primary perspective electric field and a cross-hole secondary perspective electric field aiming at two adjacent drill holes to obtain cross-hole apparent resistivity and apparent polarizability data;
(9) actively transmitting the acquired data back to the data acquisition and processing platform through the data wireless transmission base station and the satellite communication platform after the data acquisition is finished;
b. the data inversion imaging comprises the following steps:
(10) establishing a uniform rectangular coordinate system according to the axial length of the dam crest, the position and the depth of a drilling plane and the position of each drilling electrode;
(11) performing system decomposition on actually measured apparent resistivity and apparent polarizability data, giving spatial rectangular coordinates, establishing a data inversion area, forming a format file required by a data acquisition and processing platform, and substituting the format file into the data acquisition and processing platform to perform resistivity and polarizability inversion;
(12) extracting resistivity and polarizability data in the inversion region, performing data statistics to obtain a relatively low resistivity and high polarizability abnormal region, and performing real-time display and expression on a data acquisition and processing platform;
(13) dynamic early warning of the hidden leakage danger of the earth and rockfill dam is realized by contrastively analyzing resistivity and polarizability profiles acquired and inverted at different moments;
in the step (8), the apparent resistivity and the apparent polarizability data inside a single borehole and the cross-hole apparent resistivity and the apparent polarizability data between two adjacent boreholes can be collected by selecting a dipolar device, a tripolar device, a quadrapole device and the like, and the tripolar device is generally selected;
in the step (11), the resistivity and the polarizability are inverted, the detection region is subjected to two-dimensional gridding, the resistivity and the polarizability in each grid are calculated, a smooth constrained least square inversion algorithm is adopted, and the resistivity and the polarizability are inverted by a target function:
(GTG+λCTC)Δm＝GTΔd
in the formula, Δ d is observed data d and forward theoretical calculation value d0The residual vector between; g is a coefficient matrix; Δ m is a modified vector of the initial model m, and C is a model smooth matrix; λ is the smooth damping factor.
The above is a detailed description of the technical solutions provided in connection with the preferred embodiments of the present invention, and it should not be assumed that the embodiments of the present invention are limited to the above description, and it will be apparent to those skilled in the art that the present invention can be implemented in a variety of ways without departing from the spirit and scope of the present invention.
Claims (4)
1. The utility model provides an earth and rockfill dam time domain electric field monitoring devices which characterized in that: the monitoring device comprises a communication cable, a drilling electrode, an integrated electrical method host, a server, a data wireless transmission base station, a satellite communication platform and a data acquisition and processing platform, earth and rockfill dam earth electrical information is transmitted into the input end of the communication cable through the drilling cable with the drilling electrode, then is transmitted to the input end of the integrated electrical method host through the output end of the communication cable, the server is transmitted to the output end of the integrated electrical method host, the data wireless transmission base station, finally, the acquired data is transmitted back to the data acquisition and processing platform through the satellite communication platform, and finally real-time monitoring and detection of the earth and rockfill leakage dam are achieved.
2. The earth and rockfill dam time domain electric field monitoring apparatus of claim 1, wherein: the integrated electrical method host comprises a power supply module, a parameter setting module, a time domain electromagnetic excitation module, a time domain electric field acquisition module and a data transmission module.
3. The earth and rockfill dam time domain electric field monitoring apparatus of claim 1, wherein: the data acquisition and processing platform is connected with the server firstly, and then parameter setting and data acquisition command input operation are carried out on the integrated electrical method host through the data wireless transmission base station and the satellite communication platform, so that the monitoring device is ensured to realize long-term real-time monitoring after being arranged once.
4. The earth and rockfill dam time domain electric field monitoring apparatus of claim 1, wherein: the drilling electrode is a cylindrical weakly polarized or unpolarized electrode with a length of 10 cm.
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| CN202021984275.0U CN212845971U (en) | 2020-09-11 | 2020-09-11 | Earth and rockfill dam time domain electric field monitoring devices |
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| CN202021984275.0U CN212845971U (en) | 2020-09-11 | 2020-09-11 | Earth and rockfill dam time domain electric field monitoring devices |
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