CN113311489A - Coupling cable for ground cross-hole resistivity CT detection - Google Patents
Coupling cable for ground cross-hole resistivity CT detection Download PDFInfo
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- CN113311489A CN113311489A CN202110596041.1A CN202110596041A CN113311489A CN 113311489 A CN113311489 A CN 113311489A CN 202110596041 A CN202110596041 A CN 202110596041A CN 113311489 A CN113311489 A CN 113311489A
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- 238000010168 coupling process Methods 0.000 title claims abstract description 58
- 230000008878 coupling Effects 0.000 title claims abstract description 57
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 57
- 238000001514 detection method Methods 0.000 title claims abstract description 41
- 239000006260 foam Substances 0.000 claims abstract description 28
- 230000005611 electricity Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 24
- 238000005553 drilling Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 19
- 238000010276 construction Methods 0.000 description 9
- 239000011435 rock Substances 0.000 description 6
- 230000001808 coupling effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000002247 constant time method Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention provides a coupling cable for ground cross-hole resistivity CT detection, which comprises a detection cable and a couplant pipe, wherein the detection cable and the couplant pipe are arranged side by side, a plurality of electrode holders are sleeved and connected in series on the detection cable and the couplant pipe, coupling electrodes are arranged in the electrode holders, the detection cable is electrically connected with the coupling electrodes, couplant holes are formed in the electrode holders or the coupling electrodes, and the couplant pipe is communicated with the couplant holes. Before the cable is used, according to actual working conditions, a drilling machine drills a drill hole with a diameter slightly larger than that of an electrode seat, then a cable is unfolded and placed into the drill hole, a water couplant is replaced by a foam couplant, the foam couplant is conveyed into the drill hole through a couplant pipe, the coupling electrode is well connected with the wall of the drill hole, a good measuring effect is achieved, the cable is taken back after measurement is finished, and the cable is used for completing measurement.
Description
Technical Field
The invention belongs to the technical field of engineering geophysical exploration, and particularly relates to a coupling cable for ground cross-hole resistivity CT exploration.
Background
In recent years, various construction facilities have been developed vigorously with the increasing investment of the country in infrastructure construction. For some larger building facilities, including above-ground and underground buildings, the geological condition of the foundation or surrounding rock to be built is often required to be evaluated or evaluated more comprehensively before the building is built, and in order to better know the geological condition of the foundation or surrounding rock, some detection measures are usually required to be taken so as to know whether the geological safety hazard exists in the foundation or surrounding rock. Especially for underground engineering construction, if the geological condition of surrounding rocks cannot be found effectively in the construction and excavation process, unexpected geological disasters such as water inrush, mud inrush, collapse and the like are likely to occur. The consequences caused by the geological disasters are that machines are easily destroyed or knocked down to submerge the tunnel, and the normal construction is forcibly interrupted; and serious casualties are caused, huge economic losses are caused, and even some underground projects are forced to be stopped or changed. Therefore, an effective detection method is adopted to find out whether the foundation or the surrounding rock has geological defects, which is very necessary and has practical engineering significance.
The cross-hole resistivity CT method is an important geophysical exploration method, and has the unique advantages of economy, no damage, rapidness, long detection distance, high detection precision, rich detection information and the like, and has wide application in engineering detection. The working principle of the cross-hole resistivity CT method is that electrodes distributed on a measuring cable are used for supplying power to surrounding rocks or the ground, the resistivity of a target body is measured through the measuring electrodes, and then inversion imaging can be carried out on the resistivity and geological interpretation can be carried out, so that the corresponding detection purpose is achieved.
When cross-hole resistivity CT is measured, two drill holes need to be drilled on the ground underground, then a measuring cable is placed in the drill holes for measurement, in order to facilitate the placing in and taking out of the measuring cable, the diameter of the drilled hole needs to be larger than the diameter of a cable electrode, and therefore the problem of insufficient contact or even no contact between the electrode and the wall of the drill hole is caused to measurement, and further the measurement work cannot be completed.
In order to solve the problem of contact between the electrode and the hole wall of the drill hole, the existing method is to adopt a water coupling method, namely, water is injected into the drill hole, and the electrode and the hole wall are coupled by using water. The method has several disadvantages, firstly, when the underground fracture is relatively developed, especially when a relatively large water-guiding fracture exists, the injected water can be quickly guided away and can not be continuously stored in the drilled hole; secondly, when the geological condition is poor, collapse of the drill hole is easily caused after water injection, and measurement is affected; thirdly, the cable is easy to be trapped in the drilled hole and difficult to be taken out after water injection, so that economic loss is caused; fourthly, water injection can only be generally injected to the underground water level, and partial electrodes above the underground water level are difficult to use, so that the measurement effect is influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a coupling cable for ground cross-hole resistivity CT detection, wherein a water couplant is replaced by a foam couplant, the foam couplant is conveyed into a drill hole through a couplant pipe, so that a coupling electrode is well connected with the wall of the drill hole, a better measuring effect is achieved, and the technical problem of inaccurate measurement is effectively solved.
The invention relates to a purpose and an effect of a coupling cable for ground cross-hole resistivity CT detection, which are achieved by the following specific technical means:
the utility model provides a coupling cable for hole resistivity CT is surveyed across on ground, it is including detecting cable and couplant pipe, it arranges side by side to detect cable and couplant pipe, and it has a plurality of electrode holders to cup joint the series connection on detecting cable and couplant pipe, the inside coupling electrode that is equipped with of electrode holder detects the cable and is connected with the coupling electrode electricity, is equipped with the couplant hole in electrode holder or coupling electrode, and the couplant pipe communicates with the couplant hole.
The electrode holder is cylindrical structure, and detection cable and couplant pipe are located the middle part of electrode holder and vertical arrangement.
The electrode seat is made of insulating plastic or rubber materials.
The coupling electrode is positioned in the middle of the electrode holder and is horizontally arranged.
The couplant hole is located inside the coupling electrode and is horizontally arranged.
The couplant hole is positioned inside the electrode holder and is horizontally arranged.
The couplant holes are positioned on the side edges of the coupling electrodes and are arranged in parallel side by side.
And a foam couplant is arranged in the couplant pipe.
The invention at least comprises the following beneficial effects:
the method has the advantages that the operation of the practical application process is simple, before the method is used, according to practical working conditions, a drilling machine drills a drilling hole with a diameter slightly larger than that of an electrode seat, then a cable is unfolded and placed into the drilling hole, the water couplant is replaced by the foam couplant, the foam couplant is conveyed into the drilling hole through the couplant pipe, the coupling electrode is well connected with the wall of the drilling hole, a good measurement effect is achieved, the cable is taken back to complete measurement after the measurement is finished, in addition, the method can be used for both dry holes and water holes, the construction period is saved, the use is convenient, and the method is a safe and efficient ground cross-hole resistivity CT measurement cable.
Description of the drawings:
FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 2 is a top view of embodiment 1 of the present invention;
FIG. 3 is a schematic structural diagram of embodiment 2 of the present invention;
FIG. 4 is a top view of embodiment 2 of the present invention;
fig. 5 is a state diagram of the present invention in use.
Detailed Description
Embodiments of the present invention are described in further detail below by way of examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "two ends," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing and simplifying the description, and are not intended to indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be understood broadly, and for example, they may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Example 1:
the invention provides a coupling cable for ground cross-hole resistivity CT detection, which comprises a detection cable 5 and a couplant pipe 4, wherein the detection cable 5 and the couplant pipe 4 are arranged side by side, a plurality of electrode holders 2 are sleeved and connected in series on the detection cable 5 and the couplant pipe 4, a coupling electrode 1 is arranged in each electrode holder 2, the detection cable 5 is electrically connected with the coupling electrode 1, a couplant hole 3 is arranged in each electrode holder 2 or the coupling electrode 1, and the couplant pipe 4 is communicated with the couplant hole 3, as shown in the attached drawings 1, 2 and 5. The water couplant is replaced by the foam couplant, the foam couplant is conveyed into the drill hole through the couplant pipe, the coupling electrode is well connected with the wall of the drill hole, a good measuring effect is achieved, the cable is taken back to complete measuring after measuring is finished, and the water couplant can be used for both dry holes and water holes, the construction period is saved, and the use is convenient.
Further, the electrode holder 2 is a cylindrical structure, and the detection cable 5 and the couplant pipe 4 are located in the middle of the electrode holder 2 and are vertically arranged. A plurality of electrode holders 2 are connected in series from top to bottom to form a set of electrode group, and the purpose of measurement can be achieved by two groups of electrodes.
Further, the electrode holder 2 is made of insulating plastic or rubber material.
Further, the coupling electrode 1 is located in the middle of the electrode holder 2 and is horizontally arranged. The coupling electrode 1 is made of metal materials, and the axis of the coupling electrode 1 is perpendicular to the axis of the electrode holder 2, so that the coupling electrode 1 can be electrically connected with the hole wall 6 well, and a good measuring effect is achieved.
Further, the couplant holes 3 are located inside the coupling electrode 1 and are horizontally arranged. The foam couplant is sprayed into the drill hole through the couplant hole 3, so that a good coupling effect is achieved.
Furthermore, there is foam couplant in couplant pipe 4, and the couplant adopts the foam, and the top and the foam source of couplant pipe 4 are connected, and the bottom of couplant pipe 4 is sealed, and when detecting, the foam is sent to the inspection hole through couplant pipe 4, and coupling electrode 1 forms the electricity through the coupling effect of foam and pore wall 6 and is connected, can also detect in dry hole.
Furthermore, the detection cable 5 is externally connected with a measuring instrument, the measuring instrument analyzes the measured signal to obtain the geological structure condition, and the cable is taken back to complete the measurement after the measurement is finished.
The method has the advantages that the operation of the practical application process is simple, before the method is used, according to practical working conditions, a drilling machine drills a drilling hole with a diameter slightly larger than that of an electrode seat, then a cable is unfolded and placed into the drilling hole, the water couplant is replaced by the foam couplant, the foam couplant is conveyed into the drilling hole through the couplant pipe, the coupling electrode is well connected with the wall of the drilling hole, a good measurement effect is achieved, the cable is taken back to complete measurement after the measurement is finished, in addition, the method can be used for both dry holes and water holes, the construction period is saved, the use is convenient, and the method is a safe and efficient ground cross-hole resistivity CT measurement cable.
Example 2:
the invention provides a coupling cable for ground cross-hole resistivity CT detection, which comprises a detection cable 5 and a couplant pipe 4, wherein the detection cable 5 and the couplant pipe 4 are arranged side by side, a plurality of electrode holders 2 are sleeved and connected in series on the detection cable 5 and the couplant pipe 4, a coupling electrode 1 is arranged in each electrode holder 2, the detection cable 5 is electrically connected with the coupling electrode 1, the couplant hole 3 is arranged in each electrode holder 2 or the coupling electrode 1, and the couplant pipe 4 is communicated with the couplant hole 3, as shown in attached figures 3-5. The water couplant is replaced by the foam couplant, the foam couplant is conveyed into the drill hole through the couplant pipe, the coupling electrode is well connected with the wall of the drill hole, a good measuring effect is achieved, the cable is taken back to complete measuring after measuring is finished, and the water couplant can be used for both dry holes and water holes, the construction period is saved, and the use is convenient.
Further, the electrode holder 2 is a cylindrical structure, and the detection cable 5 and the couplant pipe 4 are located in the middle of the electrode holder 2 and are vertically arranged. A plurality of electrode holders 2 are connected in series from top to bottom to form a set of electrode group, and the purpose of measurement can be achieved by two groups of electrodes.
Further, the electrode holder 2 is made of insulating plastic or rubber material.
Further, the coupling electrode 1 is located in the middle of the electrode holder 2 and is horizontally arranged. The coupling electrode 1 is made of metal materials, and the axis of the coupling electrode 1 is perpendicular to the axis of the electrode holder 2, so that the coupling electrode 1 can be electrically connected with the hole wall 6 well, and a good measuring effect is achieved.
Further, the couplant holes 3 are located inside the electrode holder 2 and are horizontally arranged. The foam couplant is sprayed into the drill hole through the couplant hole 3, so that a good coupling effect is achieved.
Further, the couplant holes 3 are located at the side of the coupling electrode 1 and arranged in parallel side by side.
Furthermore, there is foam couplant in couplant pipe 4, and the couplant adopts the foam, and the top and the foam source of couplant pipe 4 are connected, and the bottom of couplant pipe 4 is sealed, and when detecting, the foam is sent to the inspection hole through couplant pipe 4, and coupling electrode 1 forms the electricity through the coupling effect of foam and pore wall 6 and is connected, can also detect in dry hole.
Furthermore, the detection cable 5 is externally connected with a measuring instrument, the measuring instrument analyzes the measured signal to obtain the geological structure condition, and the cable is taken back to complete the measurement after the measurement is finished.
The method has the advantages that the operation of the practical application process is simple, before the method is used, according to practical working conditions, a drilling machine drills a drilling hole with a diameter slightly larger than that of an electrode seat, then a cable is unfolded and placed into the drilling hole, the water couplant is replaced by the foam couplant, the foam couplant is conveyed into the drilling hole through the couplant pipe, the coupling electrode is well connected with the wall of the drilling hole, a good measurement effect is achieved, the cable is taken back to complete measurement after the measurement is finished, in addition, the method can be used for both dry holes and water holes, the construction period is saved, the use is convenient, and the method is a safe and efficient ground cross-hole resistivity CT measurement.
The invention is not described in detail, but is well known to those skilled in the art.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (8)
1. A coupling cable for ground cross-hole resistivity CT detection, characterized in that: it is including detecting cable (5) and couplant pipe (4), detect cable (5) and couplant pipe (4) and arrange side by side, cup joint on detecting cable (5) and couplant pipe (4) and establish ties a plurality of electrode holders (2), electrode holder (2) inside is equipped with coupling electrode (1), and detection cable (5) are connected with coupling electrode (1) electricity, are equipped with couplant hole (3) in electrode holder (2) or coupling electrode (1), and couplant pipe (4) and couplant hole (3) intercommunication.
2. The coupling cable for ground cross-hole resistivity CT detection of claim 1, wherein: the electrode holder (2) is of a cylindrical structure, and the detection cable (5) and the couplant pipe (4) are located in the middle of the electrode holder (2) and are vertically arranged.
3. The coupling cable for ground cross-hole resistivity CT detection of claim 2, wherein: the electrode holder (2) is made of insulating plastic or rubber materials.
4. The coupling cable for ground cross-hole resistivity CT detection of claim 1, wherein: the coupling electrode (1) is positioned in the middle of the electrode holder (2) and is horizontally arranged.
5. The coupling cable for ground cross-hole resistivity CT detection of claim 1, wherein: the couplant holes (3) are positioned inside the coupling electrode (1) and are horizontally arranged.
6. The coupling cable for ground cross-hole resistivity CT detection of claim 1, wherein: the couplant hole (3) is positioned inside the electrode holder (2) and is horizontally arranged.
7. The coupling cable for ground cross-hole resistivity CT detection of claim 6, wherein: the couplant holes (3) are positioned on the side edges of the coupling electrodes (1) and are arranged in parallel side by side.
8. The coupling cable for ground cross-hole resistivity CT detection of claim 1, wherein: and a foam couplant is arranged in the couplant pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110596041.1A CN113311489A (en) | 2021-05-29 | 2021-05-29 | Coupling cable for ground cross-hole resistivity CT detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110596041.1A CN113311489A (en) | 2021-05-29 | 2021-05-29 | Coupling cable for ground cross-hole resistivity CT detection |
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| Publication Number | Publication Date |
|---|---|
| CN113311489A true CN113311489A (en) | 2021-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110596041.1A Pending CN113311489A (en) | 2021-05-29 | 2021-05-29 | Coupling cable for ground cross-hole resistivity CT detection |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2845416A1 (en) * | 2002-10-02 | 2004-04-09 | Inst Rech Developpement Ird | Electrical diagraph probe, for measuring resistivity of bore wall, has electrodes held against bore wall by flexible extensible element inflated by pressurized fluid |
| CN201628703U (en) * | 2010-02-26 | 2010-11-10 | 中国水电顾问集团华东勘测设计研究院 | Hydraulically-coupling cross-hole acoustic wave test device |
| CN102928881A (en) * | 2012-11-07 | 2013-02-13 | 山东大学 | Coupled cable for cross-hole resistivity computed tomography (CT) on ground |
| US20170115204A1 (en) * | 2015-10-27 | 2017-04-27 | Southwest Research Institute | Magnetostrictive Probe With Mechanical and Fluid Coupling for Guided Wave Testing of Tubular Structures |
| CN208447632U (en) * | 2017-06-29 | 2019-02-01 | 深圳市必利胜电子有限公司 | The Ultrasonic-B probe of couplant can be carried |
| CN214669642U (en) * | 2021-05-29 | 2021-11-09 | 贵州晶禾科技有限公司 | Coupling cable for ground cross-hole resistivity CT detection |
-
2021
- 2021-05-29 CN CN202110596041.1A patent/CN113311489A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2845416A1 (en) * | 2002-10-02 | 2004-04-09 | Inst Rech Developpement Ird | Electrical diagraph probe, for measuring resistivity of bore wall, has electrodes held against bore wall by flexible extensible element inflated by pressurized fluid |
| CN201628703U (en) * | 2010-02-26 | 2010-11-10 | 中国水电顾问集团华东勘测设计研究院 | Hydraulically-coupling cross-hole acoustic wave test device |
| CN102928881A (en) * | 2012-11-07 | 2013-02-13 | 山东大学 | Coupled cable for cross-hole resistivity computed tomography (CT) on ground |
| US20170115204A1 (en) * | 2015-10-27 | 2017-04-27 | Southwest Research Institute | Magnetostrictive Probe With Mechanical and Fluid Coupling for Guided Wave Testing of Tubular Structures |
| CN208447632U (en) * | 2017-06-29 | 2019-02-01 | 深圳市必利胜电子有限公司 | The Ultrasonic-B probe of couplant can be carried |
| CN214669642U (en) * | 2021-05-29 | 2021-11-09 | 贵州晶禾科技有限公司 | Coupling cable for ground cross-hole resistivity CT detection |
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