CN103076636A - Directional induced polarization real-time advance water detecting device and method while drilling for tunnel construction - Google Patents
Directional induced polarization real-time advance water detecting device and method while drilling for tunnel construction Download PDFInfo
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Abstract
The invention discloses a directional induced polarization real-time advance water detecting device while drilling for tunnel construction. The device comprises a drill bit, a high-strength insulated sleeve while drilling, and a directional induced polarization detection system, wherein the drill bit is connected with the high-strength insulated sleeve while drilling through a connecting bearing, and the directional induced polarization detection system is distributed at the periphery of the high-strength insulated sleeve while drilling. The invention also provides a corresponding directional induced polarization real-time advance water detecting method while drilling for tunnel construction. According to the device and the method disclosed by the invention, the interference of the construction environment is avoided, the detection effect is better, the utilization efficiency of an advance borehole is improved, current orientation is realized, the low resistance at the borehole wall is broken through, the detection range is enlarged, an electrode is protected, and a better coupling contact between the electrode and a rock-soil body is guaranteed.
Description
Technical field
The present invention relates to orientation with drilling induced polarization exploration predictor and method in a kind of constructing tunnel process, a kind of relating in the constructing tunnel process specifically, when the workplace drilling rod creeps into forward, do not affecting under the condition of creeping into, adopt directed induced polarization exploration system, the apparatus and method that the moisture situation in workplace the place ahead is made real-time detection and forecast during to constructing tunnel.
Background technology
The prominent mud disaster of gushing water is main challenge and a difficult problem that faces in the constructing tunnel, often causes serious economic loss and production safety problem.At Tunnel during Construction, verify in advance the moisture situation of side in face of the construction working for avoiding the prominent mud disaster of gushing water to have vital role.The advanced levels probing is a kind of detecting water by pilot hole method commonly used at present, by arrange 1-3 boring in the tunnel front, carries out Advance Drilling, and the moisture situation in the place ahead, tunnel front is surveyed.The advanced levels probing is a kind of direct spy water method, if boring can directly disclose moisture tectonic structure, then can verify accurately moisture situation; If but the bore position of choosing is not deposited the zone in moisture architectonic tax, then can't disclose moisture tectonic structure, omit the prominent mud disaster source of gushing water, cause wrong report.Therefore, the bore detecting scope is less, only can make water content situation in the boring aperture and detecting, and has the problem of " a peephole view ".
In order to survey the moisture situation in the Rock And Soil around the boring, improve the investigative range of probing, people mainly adopt geophysical prospecting method in the hole in the probing of ground, such as resistivity method in geological radar method, the hole in seismic wave method, the hole in the hole etc., obtained preferably effect, for the problem that solves the tunnel front Advance Drilling provides reference.But the tunnel front Advance Drilling is visited water and is existed some comparatively special problems, so that the auxiliary geophysical prospecting method of ground probing can't be applied directly in the tunnel.A kind of detecting water by pilot hole predictor that the patent of application number 201210182857.0 proposes since investigation depth low, be subjected to the interference of metallic drilling rod and affect more seriously, extensively promoted in actual applications.For the problems referred to above, the present invention proposes the real-time detecting water by pilot hole apparatus and method of the directed induced polarization of a kind of constructing tunnel.For the present invention, the particular challenge in the tunnel is specific as follows: (1) constructing tunnel duration is generally more urgent, keeps in probing and the hole geophysical exploration time very limited, need to propose a kind of real-time detection apparatus and method with brill; (2) drill bit and drilling rod all are that high-strength steel is made, and be very large to the induced polarization exploration interference, on drill bit and drilling rod the induced polarization exploration system can't be installed directly, needs the special-purpose measurement while drilling device of design invention; (3) the induced polarization exploration degree of depth is limited in one borehole, needs to propose a kind of detection form that improves investigation depth; (4) data process and interpretation of general geophysical exploration is consuming time longer, and Advance Drilling can provide result of detection in real time, for synchronous with Advance Drilling, needs to propose a kind of real time data processing and interpretation procedure.
Summary of the invention
The objective of the invention is in order to overcome above-mentioned the deficiencies in the prior art, provide the induced polarization of a kind of constructing tunnel orientation with drilling real-time detecting water by pilot hole apparatus and method, these apparatus and method can be made the real-time continuous forecast to the place ahead, tunnel front water content situation.
To achieve these goals, the present invention adopts following technical scheme.
The real-time detecting water by pilot hole device of a kind of constructing tunnel orientation with drilling induced polarization, comprise that drill bit, high-strength insulation are with drill bushing cylinder and directed induced polarization exploration system, described drill bit connects high-strength insulation with the drill bushing cylinder by connection bearing, lay directed induced polarization exploration system at high-strength insulation with drill bushing cylinder periphery, realize carrying out in real time synchronously of Advance Drilling and induced polarization exploration, the data communication device that gathers is crossed quick decomposition method, take apparent resistivity and apparent chargeability as parameter, the moisture situation in the place ahead, tunnel front is made the real-time continuous forecast.
Described directed induced polarization exploration system comprises directed transmitting electrode system and observation electrode system, and directed transmitting electrode system comprises transmitting electrode, two auxiliary power supply electrodes and plain metal electrode, and the observation electrode system comprises two observation electrodes that do not polarize; Described two auxiliary power supply electrodes are separately fixed at the transmitting electrode both sides, and the plain metal electrode is positioned at the tunnel; Described observation electrode system is between transmitting electrode and auxiliary power supply electrode, and all electrodes of directed induced polarization exploration system all link to each other with on-the-spot main frame by cable.
Described two auxiliary power supply electrodes equate with the distance of transmitting electrode.
Described observation electrode is equidistantly laid between transmitting electrode and an auxiliary power supply electrode.
When carrying out work, the auxiliary power supply electrode is fed and the equal big or small same sex electric current of transmitting electrode, the place carries out data acquisition at the observation electrode system.The transmitting electrode transmitter current can be to parallel probing and vertical probing directional divergence under the general state, and namely the vertical linear electric current density of drilling on the direction is little to cause the required detection direction of induced polarization, and investigation depth is restricted.The auxiliary power supply electrode is parallel to the power supply of probing direction among the present invention, and orientable compressing transmitting electrode transmitter current is concentrated to vertical probing direction is directed, realizes current oriention, increases the strength of current on the required detection direction of induced polarization, increases investigation depth.
Described connection bearing rear end connects high-strength insulation with the drill bushing cylinder with the form of draw-in groove.
Described high-strength insulation is with the drill bushing cylinder, and entire body adopts high-strength PVC insulating material, and diameter is connected with drill bit by connection bearing less than bore diameter.Connection bearing is fixed on the drill bit, and the rear end is connected with the drill bushing cylinder with high-strength insulation with the draw-in groove form.Orientation induced polarization exploration system is laid in high-strength insulation with on the drill bushing cylinder, and in drilling process, high-strength insulation only advances with drilling rod with the drill bushing cylinder, but does not rotate with drilling rod, can guarantee the stable operation of directed induced polarization exploration security of system.High-strength insulation is opened metal drill pipe and directed induced polarization electrode isolation with the drill bushing cylinder, so that induced polarization exploration is not subjected to the interference of metallic drilling rod and affects, has realized simultaneously carrying out in real time synchronously of Advance Drilling and directed induced polarization exploration.
In the orientation induced polarization exploration system, except the plain metal electrode, all the other all electrodes all are to be laid in high-strength insulation with the elastic annular roller electrode on the drill bushing cylinder.
Described elastic annular roller electrode comprises elastic sheet and ball, and elastic annular roller electrode most peripheral slightly larger in diameter is in bore diameter.Groove is set on the elastic sheet, lays ball, the frictional resistance in the time of can reducing the induced polarization exploration system and advance shields to exploring electrode.Under the elastic sheet uncompressed state, elastic annular roller electrode most peripheral slightly larger in diameter is in bore diameter, and after electrode entered boring, elastic sheet was brought into play elastic reaction immediately, guarantees that preferably coupling of electrode and Rock And Soil realization contacts.Set elastic annular roller electrode is realized and the communicating by letter of on-the-spot main frame by cable.
In the observation electrode, elastic sheet outside surface, groove and ball surface all scribble solid electrolyte, and cable tail is located in the solid electrolyte.Directed transmitting electrode is then need not smear solid electrolyte, and cable tail directly draws the own elasticity thin slice.
The present invention also provides the induced polarization of a kind of constructing tunnel orientation with drilling real-time detecting water by pilot hole method, comprises the steps:
(1) on the drill bit that carries out the advanced levels probing, connection bearing is installed, the connection bearing rear end connects high-strength insulation with the drill bushing cylinder.
(2) lay directed transmitting electrode system and observation electrode system at high-strength insulation with drill bushing cylinder periphery, two auxiliary power supply electrodes are separately fixed at the transmitting electrode both sides in the described directed transmitting electrode system, and the plain metal electrode is positioned at the tunnel; Described observation electrode system is between transmitting electrode and auxiliary power supply electrode, and all electrodes of directed induced polarization exploration system all link to each other with on-the-spot main frame by cable.
(3) carry out the advanced levels probing, drill the certain depth that whenever advances, namely implement directed induced polarization forward probe.In the situation that does not stop to creep into, feed equal big or small same sex electric current to transmitting electrode, auxiliary power supply electrode, form the loop with the plain metal electrode, simultaneously at observation electrode place collection signal.
(4) on-the-spot main frame carries out the real-time detection decipher to observation electrode collection signal, obtains visual apparent resistivity and apparent chargeability result of detection.In conjunction with results of drilling, the place ahead, tunnel front water content situation is made forecast.
Described is to carry out fast in real time decipher with the scene is signal collected with boring the real-time detection decomposition method, and obtain the visual apparent resistivity of investigative range and apparent chargeability: apparent resistivity is low, and when apparent chargeability was high, the Rock And Soil property of water-bearing of detection was strong; Apparent resistivity is high, and apparent chargeability is low, a little less than the Rock And Soil property of water-bearing of detection.In conjunction with the Advance Drilling result, the place ahead, tunnel front water content situation is made forecast.
Beneficial effect of the present invention: 1. the present invention combines Advance Drilling and directed induced polarization forward probe, and directed induced polarization exploration carries out in boring, has avoided the interference of construction environment, and Effect on Detecting is better, has improved the utilization ratio of advance borehole.Directed leading induced polarization forward probe can carry out in real time with drilling process, does not need to extract out drilling rod in the detection process, does not even need to stop to creep into, and has improved the work efficiency of the place ahead, tunnel front water content being carried out advanced prediction.
2. the present invention uses high-strength insulation with the drill bushing cylinder, directed induced polarization forward probe with drilling process is separated with Advance Drilling, high-strength insulation is connected with drill bit with connection bearing with the drill bushing cylinder, in drilling process, high-strength insulation only moves forward with the drill bushing cylinder and does not rotate, two kinds of methods are carried out simultaneously, but fully separation is implemented in concrete operations, really realizes the real-time detecting water by pilot hole of orientation with drilling induced polarization.
3. the present invention adopts directed induced polarization forward probe, being provided with the directed transmitting electrode that is parallel to drilling direction is, transmitting electrode and auxiliary power supply electrode feed the same sex electric current of equal size simultaneously, make electric current concentrate on vertical drilling direction, realize current oriention, break through hole wall place low-resistance, enlarged investigative range, effectively solved the problem of Advance Drilling " a peephole view ".Directed induced polarization exploration system uses the elastic annular roller electrode, and ball can reduce advance friction force in the process of electrode, plays the effect of guard electrode, and elastic sheet can guarantee that electrode and Rock And Soil realize being coupled preferably contacting.
4. the present invention carries out fast in real time decipher to directed induced polarization forward probe is signal collected, according to parameters such as apparent chargeability and apparent resistivities, in conjunction with the Advance Drilling result, the place ahead, tunnel front water content is made the advanced prediction of real-time continuous.
Description of drawings
Fig. 1 is mounting structure synoptic diagram of the present invention.
Fig. 2 is structural representation of the present invention.
Fig. 3 is that drill bit of the present invention and high-strength insulation are with the structural representation of drill bushing cylinder.
Fig. 4 is elastic annular roller electrode three-dimensional structure diagram of the present invention.
Fig. 5 is the elastic annular roller electrode sectional view that the present invention polarizes.
Fig. 6 is the elastic annular roller electrode sectional view that the present invention does not polarize.
Fig. 7 is detection method process flow diagram of the present invention.
Fig. 8 is apparent resistivity and the apparent chargeability data plot in certain tunnel in the embodiment of the invention.
Among the figure: 1. drill bit, 2. connection bearing, 3. high-strength insulation is with the drill bushing cylinder, 4. elastic annular roller electrode, 5. elastic sheet, 6. ball, 7. solid electrolyte, 8. cable.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment.
Take certain tunnel as example, tunnel cross-section is arch, and the high 10m of span 12m, constructing tunnel proceed near the mileage YK15+533, and may there be water content in the place ahead.In order to verify front geological condition, for construction provides foundation and guidance, adopt the real-time detecting water by pilot hole forecasting procedure of orientation with drilling to survey, method flow diagram is as shown in Figure 7.
(1) on the drill bit 1 that carries out the advanced levels probing, connection bearing 2 is installed, connection bearing 2 rear ends connect high-strength insulation with drill bushing cylinder 3, as shown in Figure 3 with the form of draw-in groove.
(2) lay elastic annular roller electrode 4 at high-strength insulation with drill bushing cylinder 3 peripheries, electrodes of A is wherein arranged, be positioned at high-strength insulation with the centre position of drill bushing cylinder 3, the auxiliary power supply electrode A
1, the auxiliary power supply electrode A
2, be located at respectively high-strength insulation with the place, two ends of drill bushing cylinder 3, and equate that with the electrodes of A distance observation electrode M that does not polarize, the observation electrode N that does not polarize are in electrodes of A, auxiliary power supply electrode A
1Between equidistantly lay.The plain metal electrode B is laid in infinite point in the tunnel.All electrodes all pass through cable 8 and link to each other with on-the-spot main frame; As depicted in figs. 1 and 2.
(3) carry out the advanced levels probing, drill the certain depth that whenever advances, namely implement directed induced polarization forward probe.In the situation that does not stop to creep into, to electrodes of A, auxiliary power supply electrode A
1, the auxiliary power supply electrode A
2Feed the same sex electric current of equal size, form the loop with the plain metal electrode B, simultaneously at observation electrode M, observation electrode N place collection signal.
(4) on-the-spot main frame carries out the real-time detection decipher to observation electrode M, observation electrode N collection signal, and obtain visual apparent resistivity and apparent chargeability result of detection: apparent resistivity is low, and when apparent chargeability was high, the Rock And Soil property of water-bearing of detection was strong; Apparent resistivity is high, and apparent chargeability is low, a little less than the Rock And Soil property of water-bearing of detection.In conjunction with results of drilling, the place ahead, tunnel front water content situation is made forecast.Fig. 8 is apparent resistivity and the apparent chargeability data plot in certain tunnel in the present embodiment, and wherein the property of water-bearing at 545m-548m place is strong.
Described elastic annular roller electrode 4 is made of elastic sheet 5 and ball 6, and the diameter of elastic annular roller electrode 4 arranges groove greater than bore diameter on the elastic sheet 4, lays ball 6, such as Fig. 4-shown in Figure 6.
In observation electrode M and observation electrode N, elastic sheet 5 outside surfaces, groove and ball 6 surfaces all scribble solid electrolyte 7, and cable tail is located in the solid electrolyte 7.
Although above-mentionedly by reference to the accompanying drawings the specific embodiment of the present invention is described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (10)
1. the real-time detecting water by pilot hole device of constructing tunnel orientation with drilling induced polarization, it is characterized in that, comprise that drill bit, high-strength insulation are with drill bushing cylinder and directed induced polarization exploration system, described drill bit connects high-strength insulation with the drill bushing cylinder by connection bearing, lays directed induced polarization exploration system at high-strength insulation with drill bushing cylinder periphery; Described directed induced polarization exploration system comprises directed transmitting electrode system and observation electrode system, and directed transmitting electrode system comprises transmitting electrode, two auxiliary power supply electrodes and plain metal electrode, and the observation electrode system comprises two observation electrodes that do not polarize; Described two auxiliary power supply electrodes are separately fixed at the transmitting electrode both sides, and the plain metal electrode is positioned at the tunnel; Described observation electrode system is between transmitting electrode and auxiliary power supply electrode, and directed induced polarization exploration system links to each other with on-the-spot main frame by cable.
2. the real-time detecting water by pilot hole device of constructing tunnel orientation with drilling as claimed in claim 1 induced polarization is characterized in that, described two auxiliary power supply electrodes equate with the distance of transmitting electrode.
3. the real-time detecting water by pilot hole device of constructing tunnel orientation with drilling as claimed in claim 1 induced polarization is characterized in that, described observation electrode is equidistantly laid between transmitting electrode and an auxiliary power supply electrode.
4. the real-time detecting water by pilot hole device of constructing tunnel orientation with drilling as claimed in claim 1 induced polarization is characterized in that, described connection bearing rear end connects high-strength insulation with the drill bushing cylinder with the form of draw-in groove.
5. the real-time detecting water by pilot hole device of constructing tunnel orientation with drilling as claimed in claim 1 induced polarization is characterized in that, described high-strength insulation adopts high-strength PVC insulating material with the drill bushing cylinder, and diameter is less than bore diameter.
6. the real-time detecting water by pilot hole device of constructing tunnel orientation with drilling as claimed in claim 1 induced polarization is characterized in that, in the described directed induced polarization exploration system, except the plain metal electrode, is the elastic annular roller electrode that is laid on the high-strength insulation sleeve; Described elastic annular roller electrode comprises elastic sheet and ball, and the diameter of elastic annular roller electrode is greater than bore diameter; Groove is set on the elastic sheet, lays ball.
7. the real-time detecting water by pilot hole device of constructing tunnel orientation with drilling as claimed in claim 6 induced polarization is characterized in that, described observation electrode, and elastic sheet outside surface, groove and ball surface all scribble solid electrolyte, are provided with cable tail in the solid electrolyte.
8. the real-time detecting water by pilot hole method of constructing tunnel orientation with drilling induced polarization is characterized in that, comprises the steps:
(1) on the drill bit that carries out the advanced levels probing, connection bearing is installed, the connection bearing rear end connects high-strength insulation with the drill bushing cylinder;
(2) lay directed transmitting electrode system and observation electrode system at high-strength insulation with drill bushing cylinder periphery, two auxiliary power supply electrodes are separately fixed at the transmitting electrode both sides in the described directed transmitting electrode system, and the plain metal electrode is positioned at the tunnel; Described observation electrode system is between transmitting electrode and auxiliary power supply electrode, and all electrodes of directed induced polarization exploration system all link to each other with on-the-spot main frame by cable;
(3) carry out the advanced levels probing, drill the certain depth that whenever advances, namely implement directed induced polarization forward probe.In the situation that does not stop to creep into, feed equal big or small same sex electric current to transmitting electrode, auxiliary power supply electrode, form the loop with the plain metal electrode, simultaneously at observation electrode place collection signal;
(4) on-the-spot main frame carries out the real-time detection decipher to observation electrode collection signal, obtains visual apparent resistivity and apparent chargeability result of detection; In conjunction with results of drilling, the place ahead, tunnel front water content situation is made forecast.
9. the real-time detecting water by pilot hole method of constructing tunnel orientation with drilling as claimed in claim 8 induced polarization is characterized in that, described two auxiliary power supply electrodes equate with the distance of transmitting electrode.
10. the real-time detecting water by pilot hole method of constructing tunnel orientation with drilling as claimed in claim 8 induced polarization is characterized in that, described observation electrode is equidistantly laid between transmitting electrode and an auxiliary power supply electrode.
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| CN111622700A (en) * | 2020-06-19 | 2020-09-04 | 中国电建集团华东勘测设计研究院有限公司 | Informatization drilling system and method suitable for advance prediction of unfavorable geological structural surface |
| CN112855261A (en) * | 2020-12-30 | 2021-05-28 | 山东大学 | Drainage device, system and method suitable for TBM tunnel induced polarization instrument |
| CN113216929A (en) * | 2021-04-29 | 2021-08-06 | 中国科学院武汉岩土力学研究所 | Method and device for measuring rock and soil parameters while drilling based on electromagnetic geophysical prospecting |
| CN113216929B (en) * | 2021-04-29 | 2023-12-22 | 中国科学院武汉岩土力学研究所 | Method and equipment for measuring rock and soil parameters while drilling based on electromagnetic geophysical prospecting |
| CN113309506A (en) * | 2021-05-18 | 2021-08-27 | 山东大学 | Advanced observation method and device based on electric dipole emission in hole |
| CN113655541A (en) * | 2021-08-11 | 2021-11-16 | 中国矿业大学 | Underwater shield tunnel safety guarantee method based on directional drilling-detection integration |
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