CN101520340B - Penetration soil layer original position elastic wave testing device - Google Patents
Penetration soil layer original position elastic wave testing device Download PDFInfo
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- CN101520340B CN101520340B CN2009100682669A CN200910068266A CN101520340B CN 101520340 B CN101520340 B CN 101520340B CN 2009100682669 A CN2009100682669 A CN 2009100682669A CN 200910068266 A CN200910068266 A CN 200910068266A CN 101520340 B CN101520340 B CN 101520340B
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- elastic wave
- soil layer
- connecting link
- piezoelectric ceramics
- original position
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Abstract
The invention discloses a penetration soil layer original position elastic wave testing device which comprises a connecting link, an elastic wave damping block, two radiating bodies, two shells, two piezoelectric ceramic annular vibration generators, a tapered penetrating head, a probe connecting part and two signal wires. The penetration soil layer original position elastic wave testing device can leave out the drilling step of the prior art so as to greatly reduce the testing cost. Meanwhile, the two piezoelectric ceramic annular vibration generators which are separated by a short distance are arranged in the device. A testing frequency which is at least two orders of magnitude higher than the original position shock excitation is adopted so as to greatly enhance the testing accuracy andthe testing speed of the soil layer elastic wave speed in the course of foundation perambulation, thereby the regular pattern of change of the continuous soil layer elastic wave speed following the d epth can be obtained. In addition, the device can simultaneously test the wave speed of transverse waves and longitudinal waves, and be combined with static sounding so as to be convenient for the parallel testing and the intercomparison of various soil indicators.
Description
Technical field
The invention belongs to Geotechnical Engineering exploration technique field, particularly relate to a kind of penetration soil layer original position elastic wave testing device.
Background technology
The elastic wave velocity of soil layer is widely used in foundation soil classification in place soil classification, the seismic regionalization, the design of building aseismicity ground and analyses of shake, and therefore in engineering construction, the test of the elastic wave velocity of place or foundation soil is a very important basic work.In-situ test soil layer elastic wave velocity mainly comprises inspection layer method and two kinds of methods of cross hole method at present.Wherein inspection layer method needs at first to hole in soil layer, then wave detector placed the degree of depth of soil layer to be measured, adopts on the ground afterwards and kowtows exciting in plate method exciting or the hole, thereby record the average elasticity velocity of wave of the above soil layer of wave detector.Cross hole method need be in soil layer two holes of parallel brill simultaneously, vibration source is placed as the vibration source hole in a hole, wave detector is placed as instrument connection in another hole, thereby records the elastic wave velocity of soil layer between vibration source and the wave detector.These two kinds of methods be " Geotechnical Engineering is reconnoitred standard " at present (GB50021-2001) in the method for testing of defined.
But, more than two kinds of methods have following point: at first need in soil layer, hole before the test, so expense height, test speed are slow; In addition, need the probe on the wave detector be contacted with hole wall, so operation be wasted time and energy and coupling effect is relatively poor; In addition, be subjected to the restriction of wave detector resolution, the test spacing can not be very little, for example the vertical spacing minimum of inspection layer method test point is 1m, therefore only can test the average velocity of wave of soil layer in certain thickness range,, can not accomplish continuously, accurately test so only have the meaning of statistical average.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide do not need boring in a kind of test process, test speed is fast, coupling effect good, and can realize the soil layer elastic wave velocity continuously, the accurate penetration soil layer original position elastic wave testing device of test.
In order to achieve the above object, penetration soil layer original position elastic wave testing device provided by the invention comprises connecting link, elastic wave damping block, two radiatoies, two shells, two piezoelectric ceramics ring-type oscillators, taper injection head, probe connecting portion and two signal wires; Wherein the centre of connecting link is formed with a center pit that is used to draw signal wire; The elastic wave damping block is tubular, and is enclosed within the exterior periphery middle part of connecting link; Two radiatoies and are close to the both ends of the surface of elastic wave damping block respectively and are enclosed within on the exterior periphery of connecting link all in the form of a ring; One end of two shells is connected to the edge, outer face of two radiatoies; Two piezoelectric ceramics ring-type oscillators are close to the outer face of two radiatoies respectively and are enclosed within on the exterior periphery of connecting link, and are arranged in the inner space of shell; Inner face centre relative with the awl point on the taper injection head is recessed to form a bolt hole that is used to insert connecting link one end, and the edge then links to each other with the outer end of a shell; The probe connecting portion is the cylinder bodily form, its inner face centre is recessed to form a bolt hole that is used to insert the connecting link other end, and the centre of probe connecting portion connects and to be formed with a fairlead that is used to draw signal wire that is connected with bolt hole, and the edge of this end face then joins with the outer end of another shell; Be coated with electrode respectively on the both ends of the surface of each piezoelectric ceramics ring-type oscillator, two electrodes connect the heart yearn and the screen layer of same signal wire respectively, the other end of signal wire then successively the fairlead on center pit by connecting link and the probe connecting portion cause the outside and link to each other with signal receiving device.
The piezoelectric ceramics ring-type oscillator that inner face on the described taper injection head is close with it spacing setting of being separated by forms annular seal space thus, thereby provides moistureproof, insulation environment for piezoelectric ceramics ring-type oscillator.
The piezoelectric ceramics ring-type oscillator that inner face on the described probe connecting portion is close with it spacing setting of being separated by forms annular seal space thus, thereby provides moistureproof, insulation environment for piezoelectric ceramics ring-type oscillator.
The outer dia of described elastic wave damping block, radiator, shell, taper injection head and the connecting portion of popping one's head in is identical.
Also be with insulation tube on the outer circumference surface of described connecting link.
Penetration soil layer original position elastic wave testing device provided by the invention can save the boring step of prior art, therefore can reduce testing expense greatly.Simultaneously, be provided with two piezoelectric ceramics ring-type oscillators that standoff distance is nearer in this device, employing is than the test frequency of at least two orders of magnitude of original position exciting height, therefore the precision and the speed of the test of soil layer elastic wave velocity can obtain continuous soil layer elastic wave velocity with the change in depth rule in the time of can improving ground greatly and reconnoitre.This device can be tested shear wave and longitudinal wave velocity simultaneously and can combine with static sounding in addition, and the parallel testing of therefore being convenient to multiple soil indicator is with relatively mutual.
Description of drawings
Fig. 1 is a penetration soil layer original position elastic wave testing device vertical structure cut-open view provided by the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments penetration soil layer original position elastic wave testing device provided by the invention is elaborated.
As shown in Figure 1, penetration soil layer original position elastic wave testing device provided by the invention comprises connecting link 5, elastic wave damping block 3, two radiatoies 2, two shells 4, two piezoelectric ceramics ring-type oscillators 1, taper injection 7, probe connecting portion 8 and two signal wires 9; Wherein the centre of connecting link 5 is formed with a center pit 10 that is used to draw signal wire 9; Elastic wave damping block 3 is tubular, and is enclosed within the exterior periphery middle part of connecting link 5; Two radiatoies 2 and are close to the both ends of the surface of elastic wave damping block 3 respectively and are enclosed within on the exterior periphery of connecting link 5 all in the form of a ring; One end of two shells 4 is connected to the edge, outer face of two radiatoies 2; Two piezoelectric ceramics ring-type oscillators 1 are close to the outer face of two radiatoies 2 respectively and are enclosed within on the exterior periphery of connecting link 5, and are arranged in the inner space of shell 4; Inner face centre relative with the awl point in the taper injection 7 is recessed to form a bolt hole 11 that is used to insert connecting link 5 one ends, and the edge then links to each other with the outer end of a shell 4; Probe connecting portion 8 is the cylinder bodily form, its inner face centre is recessed to form a bolt hole 12 that is used to insert connecting link 5 other ends, and the centre of probe connecting portion 8 connects and to be formed with a fairlead 13 that is used to draw signal wire 9 that is connected with bolt hole 12, and the edge of this end face then joins with the outer end of another shell 4; Be coated with electrode respectively on the both ends of the surface of each piezoelectric ceramics ring-type oscillator 1, two electrodes connect the heart yearn and the screen layer of same signal wire 9 respectively, the other end of signal wire 9 then successively the fairlead 13 on center pit 10 by connecting link 5 and the probe connecting portion 8 cause the outside and link to each other with signal receiving device.
The spacing setting of being separated by of the inner face piezoelectric ceramics ring-type oscillator 1 close with it in the described taper injection 7 forms annular seal space 6 thus, thereby provides moistureproof, insulation environment for piezoelectric ceramics ring-type oscillator 1.
The piezoelectric ceramics ring-type oscillator 1 that inner face on the described probe connecting portion 8 is close with it spacing setting of being separated by forms annular seal space 14 thus, thereby provides moistureproof, insulation environment for piezoelectric ceramics ring-type oscillator 1.
Described elastic wave damping block 3, radiator 2, shell 4, taper injection 7 is identical with the outer dia of probe connecting portion 8.
Also be with insulation tube on the outer circumference surface of described connecting link 5.
When assembling penetration soil layer original position elastic wave testing device provided by the invention, at first on the both ends of the surface of each piezoelectric ceramics ring-type oscillator 1, weld top electrode, draw signal wire 9 simultaneously, then two piezoelectric ceramics ring-type oscillators 1 are sticked on respectively on two radiatoies of making by aluminium alloy or organic glass 2.Afterwards signal wire 9 is passed by the center pit on the connecting link 5 10, on the outer circumference surface of connecting link 5, put insulation tube, the exterior periphery middle part of connecting link 5 be will be enclosed within by the tubular elastic wave damping block 3 that the specific rubber material is made then, two radiatoies 2 and two piezoelectric ceramics ring-type oscillators 1 will be inserted in afterwards at connecting link 5 two ends respectively.Then an end of two shells of being made by stainless steel material 4 is connected to the edge, outer face of two radiatoies 2, two signal wires 9 that will pass from center pit 10 on the connecting link 5 cause the outside and link to each other with signal receiving device from the fairlead 13 on the probe connecting portion 8 at last, again taper injection 7 are connected to connecting link 5 two ends with the connecting portion 8 of popping one's head in and can finish whole assembling process.
When needs utilize penetration soil layer original position elastic wave testing device provided by the invention to carry out the elastic wave velocity test of soil layer, at first the degree of depth according to soil layer to be measured connects one or more feeler lever on probe connecting portion 8, make then in the taper injection 7 the awl point down, utilize external force with in the whole penetration soil layer original position elastic wave testing device injection soil layer, afterwards until reaching the required degree of depth.Apply a pulse voltage for a piezoelectric ceramics ring-type oscillator 1 by signal wire 9 then, so that piezoelectric ceramics ring-type oscillator 1 thickness takes place or turns round and cut vibration.This vibrational energy will be propagated in the radiator 2 that is attached thereto with the form of elastic wave, and elastic wave damping block 3 can stop this elasticity wave propagation.Because radiator 2 can closely contact with soil layer on every side, so elastic wave can only enter soil layer on every side.In addition, because unique parts that piezoelectric ceramics ring-type oscillator 1 and soil layer are got in touch are radiator 2, the elastic wave that therefore enters soil layer can only be received by another piezoelectric ceramics ring-type oscillator 1 by another radiator 2 through shortest path.Again it is converted into electric signal after this piezoelectric ceramics ring-type oscillator 1 receives this vibration signal, this electric signal reaches signal receiving device by signal wire 9 again.Suppose to receive pulsed electrical signal during this period of time for Δ t from being issued to of pulse voltage, the clear distance between two radiatoies 2 is L, and then the elastic wave velocity of soil layer is L/ Δ t.
Claims (2)
1. penetration soil layer original position elastic wave testing device is characterized in that: described penetration soil layer original position elastic wave testing device comprises connecting link (5), elastic wave damping block (3), two radiatoies (2), two shells (4), two piezoelectric ceramics ring-type oscillators (1), taper injection head (7), probe connecting portion (8) and two signal wires (9); Wherein the centre of connecting link (5) is formed with a center pit (10) that is used to draw signal wire (9); Elastic wave damping block (3) is tubular, and is enclosed within the exterior periphery middle part of connecting link (5); Two radiatoies (2) and are close to the both ends of the surface of elastic wave damping block (3) respectively and are enclosed within on the exterior periphery of connecting link (5) all in the form of a ring; One end of two shells (4) is connected to the edge, outer face of two radiatoies (2); Two piezoelectric ceramics ring-type oscillators (1) are close to the outer face of two radiatoies (2) respectively and are enclosed within on the exterior periphery of connecting link (5), and are arranged in the inner space of shell (4); Taper injection head (7) is gone up the inner face centre relative with the awl point and is recessed to form a bolt hole (11) that is used to insert connecting link (5) one ends, and the edge then links to each other with the outer end of a shell (4); Probe connecting portion (8) is the cylinder bodily form, its inner face centre is recessed to form a bolt hole (12) that is used to insert connecting link (5) other end, and the centre of probe connecting portion (8) connects and to be formed with a fairlead that is used to draw signal wire (9) (13) that is connected with bolt hole (12), and the edge of this end face then joins with the outer end of another shell (4); Be coated with electrode respectively on the both ends of the surface of each piezoelectric ceramics ring-type oscillator (1), two electrodes connect the heart yearn and the screen layer of same signal wire (9) respectively, the other end of signal wire (9) then successively the fairlead (13) on center pit (10) by connecting link (5) and the probe connecting portion (8) cause the outside and link to each other with signal receiving device; The piezoelectric ceramics ring-type oscillator (1) that inner face on the described taper injection head (7) is close with it spacing setting of being separated by forms annular seal space (6) thus, thereby provides moistureproof, insulation environment for piezoelectric ceramics ring-type oscillator (1); The piezoelectric ceramics ring-type oscillator (1) that inner face on the described probe connecting portion (8) is close with it spacing setting of being separated by forms annular seal space (14) thus, thereby provides moistureproof, insulation environment for piezoelectric ceramics ring-type oscillator (1); The outer dia of described elastic wave damping block (3), radiator (2), shell (4), taper injection head (7) and the connecting portion (8) of popping one's head in is identical.
2. penetration soil layer original position elastic wave testing device according to claim 1 is characterized in that: also be with insulation tube on the outer circumference surface of described connecting link (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100682669A CN101520340B (en) | 2009-03-27 | 2009-03-27 | Penetration soil layer original position elastic wave testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100682669A CN101520340B (en) | 2009-03-27 | 2009-03-27 | Penetration soil layer original position elastic wave testing device |
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| Publication Number | Publication Date |
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| CN101520340A CN101520340A (en) | 2009-09-02 |
| CN101520340B true CN101520340B (en) | 2010-07-28 |
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| CN2009100682669A Expired - Fee Related CN101520340B (en) | 2009-03-27 | 2009-03-27 | Penetration soil layer original position elastic wave testing device |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071671B (en) * | 2010-11-26 | 2012-05-23 | 东南大学 | Energy environment static sounding probe capable of measuring thermal conductivity of soil mass |
| CN102900064B (en) * | 2012-11-14 | 2014-10-29 | 安徽华电工程咨询设计有限公司 | Micro static force penetrometer |
| CN111638269B (en) * | 2020-05-26 | 2021-08-03 | 浙江大学 | Pile side pressing-in probe transmitted wave detection method for high bearing platform pile quality detection |
| CN114217045A (en) * | 2021-11-25 | 2022-03-22 | 东南大学 | Seismic wave static sounding calibration tank system and using method thereof |
| CN115390129A (en) * | 2022-07-21 | 2022-11-25 | 自然资源部第二海洋研究所 | In-situ acoustic penetration device with built-in longitudinal and transverse wave transmitting and receiving transducers |
| CN116559956B (en) * | 2023-04-28 | 2024-04-16 | 上海勘测设计研究院有限公司 | Submarine seismic wave testing equipment and method |
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| CN1458522A (en) * | 2003-05-23 | 2003-11-26 | 天津大学 | New technological method-1 for detecting shear wave speed in geotechnical static and dynamic triaxial instrument |
| CN1458523A (en) * | 2003-05-23 | 2003-11-26 | 天津大学 | New technological method-2 for detecting shear wave speed in geotechnical static and dynamic triaxial instrument |
| CN1699705A (en) * | 2004-05-20 | 2005-11-23 | 金胜 | Cast-in-place peg nondestructive checking method |
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2009
- 2009-03-27 CN CN2009100682669A patent/CN101520340B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1458522A (en) * | 2003-05-23 | 2003-11-26 | 天津大学 | New technological method-1 for detecting shear wave speed in geotechnical static and dynamic triaxial instrument |
| CN1458523A (en) * | 2003-05-23 | 2003-11-26 | 天津大学 | New technological method-2 for detecting shear wave speed in geotechnical static and dynamic triaxial instrument |
| CN1699705A (en) * | 2004-05-20 | 2005-11-23 | 金胜 | Cast-in-place peg nondestructive checking method |
Non-Patent Citations (1)
| Title |
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| 陶莅宁，侯广春.波速测试技术在工程地质勘察中的应用.山东煤炭科技.2008,(2), * |
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Granted publication date: 20100728 Termination date: 20120327 |