CN113295735A - General ground cross-hole resistivity CT detection cable for dry and wet holes - Google Patents
General ground cross-hole resistivity CT detection cable for dry and wet holes Download PDFInfo
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- CN113295735A CN113295735A CN202110664936.4A CN202110664936A CN113295735A CN 113295735 A CN113295735 A CN 113295735A CN 202110664936 A CN202110664936 A CN 202110664936A CN 113295735 A CN113295735 A CN 113295735A
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Abstract
The invention provides a ground cross-hole resistivity CT detection cable universal for dry and wet holes, which comprises a gauge acquisition and analysis cable and a control cable, wherein the gauge acquisition and analysis cable and the control cable are arranged side by side, a plurality of electrode string seats are sleeved and connected in series on the gauge acquisition and analysis cable and the control cable, the outer side wall of each electrode string seat is connected with an elastic sheet, a detection electrode is connected on the elastic sheet, the detection electrode is electrically connected with the gauge acquisition and analysis cable through the elastic sheet, a magnetic coil is arranged on each electrode string seat, the magnetic coil is electrically connected with the control cable, and the elastic sheet is positioned outside the magnetic coil. The opening and closing of the magnetic coil are controlled through the control cable, the detection electrode is controlled to be folded and unfolded, when the detection electrode is folded, the detection electrode is attached to the electrode string seat, the cable can be conveniently placed in a drilled hole, after the cable is placed in place, the power supply of the control cable is closed, the magnetic coil is powered off, the detection electrode is outwards opened under the elastic action of the elastic sheet and is connected to the side wall of the drilled hole, the purpose of electric connection is achieved, and a good measurement effect can be achieved.
Description
Technical Field
The invention belongs to the technical field of engineering geophysical exploration, and particularly relates to a ground cross-hole resistivity CT exploration cable universal for dry and wet holes.
Background
The underground space resource is an important natural resource and has important significance in the aspects of infrastructure construction, civil defense engineering construction, environment construction and the like. Because the underground geologic body is relatively complicated in the process of developing the underground space, if the mutual influence and action of underground space development activities and geological environment are not fully considered, environmental geological problems or geological disasters can be generated under certain conditions. The environmental and geological problems caused by underground space development mainly comprise karst-induced ground deformation or settlement, inrush piping or sandy soil liquefaction caused by uncovering a stratum confined aquifer, ground collapse caused by underground cavities in the development process, building damage caused by fracture and creep or sudden dislocation of active faults, ground disturbance damage possibly caused by boulders in the subway tunnel tunneling process and the like, and the environmental and geological problems and geological disasters caused by underground space development are more difficult to deal with than the ground. Therefore, in order to reduce the risk of the accident disaster in the underground space development process, the most effective solution is to utilize the geophysical advance forecasting technology to detect or determine the unfavorable geological condition of the underground space under the overground structure in the service period in advance, and to make reasonable treatment measures and construction schemes according to the lower geological condition in advance.
How to find out the unfavorable geological condition of the underground space and avoid or prevent in advance geological disasters which harm the life and property safety of people, such as ground collapse, building destruction and the like caused by the unfavorable geology, is now more and more valued by the nation.
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.
Disclosure of Invention
In order to solve the technical problems, the invention provides a ground cross-hole resistivity CT detection cable commonly used for dry and wet holes, wherein a magnetic coil and a magnetic column are arranged on an electrode string seat, the magnetic coil is remotely controlled to be opened and closed through a control cable so as to control the collection and the release of a detection electrode, when the detection electrode is collected, the detection electrode is attached to the electrode string seat, the cable can be conveniently placed in a drilled hole, when the cable is placed in place, a power supply of the control cable is closed, the magnetic coil is powered off, the detection electrode is outwards opened under the elastic force of an elastic sheet and connected to the side wall of the drilled hole, the purpose of electric connection is achieved, a good measurement effect can be achieved, and the technical problem of inaccurate measurement is effectively solved.
The invention relates to a purpose and an effect of a ground cross-hole resistivity CT detection cable universal for dry and wet holes, which are achieved by the following specific technical means:
the utility model provides a hole resistivity CT detection cable is striden on general ground of wet hole futilely, it includes appearance number collection analysis cable and control cable, appearance number collection analysis cable and control cable arrange side by side, cup joint the series connection on appearance number collection analysis cable and control cable and have a plurality of electrode cluster seats, be connected with at least one flexure strip on the electrode cluster seat lateral wall, be connected with detection electrode on the flexure strip, detection electrode passes through the flexure strip and is connected with appearance number collection analysis cable electricity, is equipped with at least one magnetic coil on the electrode cluster seat, and the magnetic coil is connected with the control cable electricity, and the flexure strip is located the magnetic coil outside.
The electrode string seat is provided with the magnetic coil, the magnetic coil is remotely controlled to be opened and closed through the control cable, the detection electrode is controlled to be retracted and released, when the detection electrode is retracted, the detection electrode is attached to the electrode string seat, the cable can be conveniently placed in the drilled hole, after the cable is placed in place, the power supply of the control cable is turned off, the magnetic coil is powered off, the detection electrode is outwards opened and connected to the hole wall of the drilled hole under the elastic action of the elastic sheet, the purpose of electric connection is achieved, a good measurement effect can be achieved, after the measurement is finished, the power supply of the control cable is turned on, the magnetic coil is powered on, the detection electrode is retracted into the groove in the electrode string seat, the cable can be conveniently taken back to complete the measurement, and the electrode string seat can be used for both dry holes and water holes, can save the construction period and is convenient to use.
The electrode string seat is of a cylindrical structure, a threading hole is formed in the middle of the electrode string seat, and the instrument number acquisition and analysis cable and the control cable are located in the threading hole and are vertically arranged. A plurality of upper and lower electrode string seats are connected in series from top to bottom to form an electrode group cable, and the purpose of measurement can be achieved by two groups of electrode group cables.
The outer side wall of the electrode string seat is provided with a vertical groove, and the elastic sheet is positioned in the groove. When the control cable circular telegram, can receive the flexure strip with this moment receipts in the recess, the whole overall dimension of electrode cluster seat is less like this, can be convenient place the cable in the drilling go. After the cable is placed in place, the power supply of the control cable is closed, the elastic sheet is bounced outwards under the action of elastic force, the detection electrode can be connected to the hole wall of the drilled hole, the purpose of electric connection is achieved, and detection work can be carried out.
The electrode string seat is provided with a magnetic column which is horizontally arranged, a cylindrical annular groove is arranged between the magnetic column and the electrode string seat, a magnetic coil is positioned in the annular groove, a cable hole is arranged between the annular groove and the threading hole, and a lead connected with a control cable is positioned in the cable hole.
The magnetic column is made of iron materials, the magnetic coil is wound on the outer surface of the magnetic column, and an insulating material is arranged between the magnetic coil and the magnetic column. When the magnetic coil is electrified, magnetic force is generated, the magnet holder can be attracted to the magnetic column, and the purpose of retracting the detection electrode is achieved. When the magnetic coil is de-energized, the detection electrode is opened outwards under the elastic force of the elastic sheet, so that the purpose of communicating the detection electrode with the hole wall is achieved, and detection work is facilitated.
The elastic sheet is vertically arranged, the top end of the elastic sheet is fixedly connected to the inner wall of the groove of the electrode string seat, the inner side and the outer side of the bottom end of the elastic sheet are fixedly connected with the magnet attraction seat and the detection electrode respectively, and the magnet attraction seat is opposite to the outer side of the magnetic column.
The detection electrode is a hemispherical or conical or cylindrical structure.
The number of the elastic pieces is at least one and corresponds to the grooves, the magnetic columns and the magnetic coils respectively.
The invention at least comprises the following beneficial effects:
through set up magnetic coil and magnetic column on the electrode cluster seat, rethread control cable carries out the opening and shutting of distal end control magnetic coil, reach the receipts and putting of control detection electrode, when detection electrode receives, at this moment detection electrode laminating is on the electrode cluster seat, can be convenient place the cable in the drilling go, after the cable is placed in place, the power of control cable is closed again, at this moment the magnetic coil loses the electricity, detection electrode outwards opens under the elastic force effect of flexure strip and is connected to on the lateral wall of drilling, reach the purpose of electricity connection, can reach better measuring effect. The practical application process is simple to operate, before the cable is used, according to practical working conditions, a drilling machine drills a drill hole with a diameter slightly larger than the diameter of the electrode string seat, then the cable is unfolded and placed into the drill hole, then the power supply of the control cable is turned off, at the moment, the magnetic coil is powered off, the detection electrode is unfolded outwards under the elastic action of the elastic sheet and connected to the side wall of the drill hole, the purpose of electric connection is achieved, a good measurement effect is achieved, after the measurement is finished, the power supply of the control cable is turned on, at the moment, the magnetic coil is powered on, then the detection electrode is folded into the groove in the electrode string seat, the cable can be conveniently taken back to complete the measurement work, the cable can be used for both dry holes and water holes, the construction period is saved, the cable is convenient to use, and the cable is a safe and efficient ground cross-hole resistivity CT measurement cable.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view A-A of the present invention;
fig. 3 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 (b):
the invention provides a ground cross-hole resistivity CT detection cable universal for dry and wet holes, which comprises an instrument number acquisition and analysis cable 2 and a control cable 1, wherein the instrument number acquisition and analysis cable 2 and the control cable 1 are arranged side by side, a plurality of electrode string seats 3 are sleeved and connected in series on the instrument number acquisition and analysis cable 2 and the control cable 1, four elastic sheets 12 are connected on the outer side walls of the electrode string seats 3, detection electrodes 11 are connected on the elastic sheets 12, the detection electrodes 11 are electrically connected with the instrument number acquisition and analysis cable 2 through the elastic sheets 12, four magnetic coils 4 are arranged on the electrode string seats 3, the magnetic coils 4 are electrically connected with the control cable 1, and the elastic sheets 12 are positioned on the outer sides of the magnetic coils 4. The magnetic coil 4 is arranged on the electrode string seat 3, the remote control of the opening and closing of the magnetic coil 4 is carried out through the control cable, the retraction and the release of the detection electrode 11 are controlled, when the detection electrode 11 is retracted, the detection electrode 11 is attached to the electrode string seat 3, the cable can be conveniently placed in a drill hole, when the cable is placed in place, the power supply of the control cable 1 is closed, the magnetic coil 4 is de-energized, the detection electrode 11 is outwards opened and connected to the hole wall 13 of the drill hole under the elastic force of the elastic sheet 12, the purpose of electric connection is achieved, the better measurement effect can be achieved, after the measurement is finished, the power supply of the control cable 1 is opened, the magnetic coil 4 is energized, the detection electrode 11 is retracted into the groove 10 on the electrode string seat 3, the cable can be conveniently taken back to finish the measurement, and the dual-purpose of hole drying and water hole saving, construction period saving, and construction period saving, Is convenient to use.
Further, electrode cluster seat 3 is cylindrical structure, has through wires hole 6 in the centre of electrode cluster seat 3, and appearance number collection analysis cable 2 and control cable 1 are located through wires hole 6 and vertical the arranging. A plurality of upper and lower electrode cluster seats 3 are connected in series from top to bottom to form an electrode group cable, and the purpose of measurement can be achieved by two groups of electrode group cables.
Furthermore, a vertical groove 10 is arranged on the outer side wall of the electrode string seat 3, and the elastic sheet 12 is positioned in the groove 10. When the control cable 1 is electrified, the elastic sheet 12 can be folded in the groove 10, so that the overall dimension of the electrode string seat 3 is small, and the cable can be conveniently placed in a drilled hole. After the cable is placed in place, the power supply of the control cable 1 is turned off, at this time, the elastic sheet 12 is bounced outwards under the action of elastic force, the detection electrode 11 can be connected to the hole wall 13 of the drilled hole, the purpose of electric connection is achieved, and detection work can be carried out.
Further, a magnetic column 9 is horizontally arranged on the electrode string seat 3, a cylindrical annular groove 8 is arranged between the magnetic column 9 and the electrode string seat 3, the magnetic coil 4 is positioned in the annular groove 8, a cable hole 7 is arranged between the annular groove 8 and the threading hole 6, and a lead connected with the control cable 1 of the magnetic coil 4 is positioned in the cable hole 7.
Further, the magnetic column 9 is made of a ferrous material, the magnetic coil 4 is wound on the outer surface of the magnetic column 9, and an insulating material is arranged between the magnetic coil 4 and the magnetic column 9. When the magnetic coil 4 is electrified, magnetic force is generated, the magnet holder 5 can be attracted to the magnetic column 9, and the purpose of folding the detection electrode 11 is achieved. When the magnetic coil 4 is de-energized, the detection electrode 11 is expanded outwards under the elastic force of the elastic sheet 12, so that the purpose of communicating the detection electrode 11 with the hole wall 13 is achieved, and detection work is facilitated.
Further, the elastic sheet 12 is vertically arranged, the top end of the elastic sheet 12 is fixedly connected to the inner wall of the groove 10 of the electrode string seat 3, the inner side and the outer side of the bottom end of the elastic sheet 12 are fixedly connected with the magnet seat 5 and the detection electrode 11 respectively, and the magnet seat 5 is over against the outer side of the magnetic column 9.
Further, the detecting electrode 11 has a hemispherical or conical or cylindrical structure. In this implementation, the hemispherical structure is adopted, which is convenient when placing cables into the drill hole.
Furthermore, the instrument number acquisition and analysis cable 2 and the control cable 1 are externally connected with a measuring instrument, the measured signals are analyzed by the measuring instrument, the geological structure condition can be obtained, the cable is taken back to complete the measurement after the measurement is finished, and the invention has the advantages of dual purposes of dry holes and water holes, construction period saving and convenient use.
Through set up magnetic coil and magnetic column on the electrode cluster seat, rethread control cable carries out the opening and shutting of distal end control magnetic coil, reach the receipts and putting of control detection electrode, when detection electrode receives, at this moment detection electrode laminating is on the electrode cluster seat, can be convenient place the cable in the drilling go, after the cable is placed in place, the power of control cable is closed again, at this moment the magnetic coil loses the electricity, detection electrode outwards opens under the elastic force effect of flexure strip and is connected to on the lateral wall of drilling, reach the purpose of electricity connection, can reach better measuring effect. The practical application process is simple to operate, before the cable is used, according to practical working conditions, a drilling machine drills a drill hole with a diameter slightly larger than the diameter of the electrode string seat, then the cable is unfolded and placed into the drill hole, then the power supply of the control cable is turned off, at the moment, the magnetic coil is powered off, the detection electrode is unfolded outwards under the elastic action of the elastic sheet and connected to the side wall of the drill hole, the purpose of electric connection is achieved, a good measurement effect is achieved, after the measurement is finished, the power supply of the control cable is turned on, at the moment, the magnetic coil is powered on, then the detection electrode is folded into the groove in the electrode string seat, the cable can be conveniently taken back to complete the measurement work, the cable can be used for both dry holes and water holes, the construction period is saved, the cable is convenient to use, and the cable is a safe and efficient ground cross-hole resistivity CT measurement cable.
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. The utility model provides a general ground of dry and wet hole strides hole resistivity CT and surveys cable which characterized in that: it includes appearance number collection analysis cable (2) and control cable (1), appearance number collection analysis cable (2) and control cable (1) are arranged side by side, cup joint on appearance number collection analysis cable (2) and control cable (1) and establish ties and have a plurality of electrode cluster seats (3), be connected with at least one flexure strip (12) on electrode cluster seat (3) lateral wall, be connected with detection electrode (11) on flexure strip (12), detection electrode (11) are connected with appearance number collection analysis cable (2) electricity through flexure strip (12), are equipped with at least one magnetic coil (4) on electrode cluster seat (3), and magnetic coil (4) are connected with control cable (1) electricity, and flexure strip (12) are located the magnetic coil (4) outside.
2. The dry-wet hole universal ground cross-hole resistivity CT detection cable of claim 1, characterized in that: the electrode string seat (3) is of a cylindrical structure, a threading hole (6) is formed in the middle of the electrode string seat (3), and the instrument number acquisition and analysis cable (2) and the control cable (1) are located in the threading hole (6) and are vertically arranged.
3. The dry-wet hole universal ground cross-hole resistivity CT detection cable of claim 1, characterized in that: the outer side wall of the electrode string seat (3) is provided with a vertical groove (10), and the elastic sheet (12) is positioned in the groove (10).
4. The dry-wet hole universal ground cross-hole resistivity CT detection cable of claim 1, characterized in that: the electrode string seat is characterized in that a magnetic column (9) is horizontally arranged on the electrode string seat (3), a cylindrical annular groove (8) is formed between the magnetic column (9) and the electrode string seat (3), the magnetic coil (4) is located in the annular groove (8), a cable hole (7) is formed between the annular groove (8) and the threading hole (6), and a lead connected with the control cable (1) of the magnetic coil (4) is located in the cable hole (7).
5. The CT detection cable for the cross-hole resistivity of the ground for the dry and wet holes in the universal manner according to claim 4, wherein: the magnetic column (9) is made of iron materials, the magnetic coil (4) is wound on the outer surface of the magnetic column (9), and an insulating material is arranged between the magnetic coil (4) and the magnetic column (9).
6. The dry-wet hole universal ground cross-hole resistivity CT detection cable of claim 1, characterized in that: the electrode string seat is characterized in that the elastic pieces (12) are vertically arranged, the top ends of the elastic pieces (12) are fixedly connected to the inner walls of the grooves (10) of the electrode string seat (3), the inner side and the outer side of the bottom end of each elastic piece (12) are fixedly connected with the magnet attraction seat (5) and the detection electrode (11), and the magnet attraction seat (5) is opposite to the outer side of the magnetic column (9).
7. The dry-wet hole universal ground cross-hole resistivity CT detection cable of claim 1, characterized in that: the detection electrode (11) is of a hemispherical or conical or cylindrical structure.
8. The CT detection cable for cross-hole resistivity on the ground for both dry and wet holes in claim 6, wherein: the number of the elastic pieces (12) is at least one and corresponds to the number of the grooves (10), the magnetic columns (9) and the magnetic coils (4).
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2021
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GB683651A (en) * | 1949-10-18 | 1952-12-03 | Schlumberger Overseas | Resistivity apparatus for obtaining indications of permeable formations traversed by a bore hole |
GB844174A (en) * | 1956-08-22 | 1960-08-10 | Jersey Prod Res Co | Well logging apparatus |
GB1322537A (en) * | 1969-07-10 | 1973-07-04 | Schlumberger Prospection | Well logging sonde |
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CN214953200U (en) * | 2021-06-16 | 2021-11-30 | 贵州晶禾科技有限公司 | General ground cross-hole resistivity CT detection cable for dry and wet holes |
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