CN106525980B - A kind of on-site testing device and method of Rock And Soil dynamic parameter damping ratio - Google Patents
A kind of on-site testing device and method of Rock And Soil dynamic parameter damping ratio Download PDFInfo
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Abstract
The invention discloses the on-site testing device and method of a kind of Rock And Soil dynamic parameter damping ratio, described device includes spark source electrode, dual pressure controller, sensor device, control and data collecting instrument, the computer that can control direction；Test method is as follows: first drilling in test site, including an exciting hole and two instrument connections, focus hole and instrument connection are on same profile, place spark source in focus hole, the speed sensor implementations of controllable direction are installed on instrument connection, pass through sensor, data collecting instrument and computer testing record the vibration information on same survey line from focus different distance, Fourier transformation is carried out to the time domain data of two sensors, obtain the amplitude-frequency relationship of seismic wave, cross-correlation analysis is carried out by the data to two sensors, obtain the phase and frequency relationship of test point vibration；Finally according to the relationship of each measuring point amplitude and measuring point and hypocentral distance and damping ratio, the damping ratio that rock-soil layer corresponds to different frequency vibration is calculated.
Description
Technical field
The invention belongs to geotechnical engineering testing fields, and in particular to a kind of on-the-spot test of Rock And Soil dynamic parameter damping ratio
Device further relates to the on-the-spot test method of damping ratio.
Background technique
Damping ratio is one of ground dynamic parameter, has critically important status in Aseismic Design.Ground is tested at present
The method of damping ratio mainly has laboratory test and field test.Laboratory test includes (soil) dynamic triaxial tests, the examination of (soil) Resonant Column
It tests, (rock) Izod test etc.；Field test is mainly in-situ precast concret block exciter test.Rock And Soil is come
It says, the above test method there are problems that some not overcoming.Firstly, laboratory test sampling and sample preparation are difficult, soil body sampling and
Disturbance inevitably is generated to soil structures when sample processing, undisturbed soil will not be substantially got when especially sampling, or even finally add
The sample of work inherently remolds body, and the true of the live soil body cannot be reflected certainly by carrying out laboratory test its result with non-undisturbed sample
Real state；It is intact rock that rock Izod test, which requires subjects, and practical rock mass includes that a large amount of joint fissures etc. do not connect
The mechanical property difference of continuous face, sillar and rock mass is big, cannot substitute mutually.Secondly, live exciter test is at high cost, it is typically only capable to
It is tested on a small quantity in a certain Rock And Soil level exposed, the exciter test of the following rock-soil layer of earth's surface can not be carried out, tested
As a result entire stratum cannot be represented.Third, test result include that information content is few, and damping ratio is that reflection stress wave passes in Rock And Soil
The parameter of energy loss during broadcasting, related with the frequency of stress wave, test method cannot provide damping ratio and frequency at present
Correlation between rate.
The drawbacks of in view of current test method, it is necessary to develop a kind of new damping ratio test device and method, the device
And method requires to can be carried out field test for rock mass and the soil body, test principle is clear, and easy to implement, test result can be anti-
The real conditions of Rock And Soil, and abundant information are reflected, is used convenient for designer.
Summary of the invention
The purpose of the invention is to provide a kind of on-site testing device of Rock And Soil dynamic parameter damping ratio, the devices
Structure is simple, easy to operate, adapts to the various conditions in scene.
Another object of the present invention is to be the provision of a kind of on-the-spot test method of Rock And Soil dynamic parameter damping ratio,
This method has taken into account rock mass and the soil body, is drilled by Rock And Soil scene, the damping ratio of each layer of position of Rock And Soil between testing bore holes, surveys
Examination process does not have any restrictions requirement to rock-soil layer property, and test process does not have any disturbance to Rock And Soil, maintains
The nature of Rock And Soil.In addition, can test as needed the rock-soil layer in different depth and direction.Test result packet
The damping ratio that lower rock-soil layer is vibrated containing different frequency, can provide foundation for Aseismic Design.
In order to achieve the above purpose, the invention adopts the following technical scheme:
A kind of on-site testing device of Rock And Soil dynamic parameter damping ratio, the device include spark source electrode,
Dual pressure controller, the sensor device in the first, second controllable direction, control and data collecting instrument, computer.Spark source
Electrode is placed in exciting hole, and spark source electrode is connected with dual pressure controller by coaxial cable；Control and signal sampler
It is connected by the synchronism output interface of coaxial cable and dual pressure controller, the sensor device in direction can control to access by cable
The interface of control and data collecting instrument, computer are connect by USB line with control and data collecting instrument.The controllable direction
Sensor device be two, be individually fixed in instrument connection, including lower bottom base, upper bed-plate, lower bottom base include air bag, slow down electricity
Machine, air bag are equipped with aeration aperture, and air bag is wrapped in the side wall of lower bottom base, is filled by the inflated hose being connected on stomata to air bag
Gas makes lower bottom base be fixed on the designated depth of instrument connection, and decelerating motor is fixed on the center of lower bottom base, and axis is fixed with upper bed-plate
Connection, decelerating motor rotation drive upper bed-plate to change direction；Upper bed-plate includes push-rod electric machine, sensor, electronic compass, support
Boots, supporting boot is located at the two sides of upper bed-plate, and is fixedly connected with the push rod of push-rod electric machine, pushes supporting boot by push-rod electric machine,
Upper bed-plate is fixed on hole wall, sensor is located at the top of push-rod electric machine, and electronic compass is fixed on the top of sensor, sensing
The X of device, Y-direction are consistent with the X of electronic compass, Y-direction.
A kind of on-the-spot test method of Rock And Soil dynamic parameter damping ratio, step is:
1) it drills in test site, drilling hole amount is three, and three drilling respectively swashs in the same section
Shake hole, the first instrument connection, the second instrument connection, drills into the rock-soil layer of test；
2) the spark source electrode in above-mentioned on-site testing device is put into exciting hole designated depth, first, second can
Control direction sensor device is respectively put into the designated depth of the first instrument connection, the second instrument connection, spark source electrode and
For two sensor devices on same straight line, the designated depth is the place depth of tested Rock And Soil；
3) azimuth for using electronic compass testing bore holes line, adjusts the direction of sensor, makes its X-direction and drilling line
Direction is consistent；
4) dual pressure controller charges, and control and data collecting instrument are in acquisition wait state；
5) dual pressure controller discharges, and generates pinking, control and data collecting instrument and computer record saves each sensor
Vibration information；
6) data of acquisition are handled according to the following steps, calculate rock-soil layer different frequency and vibrates corresponding damping ratio:
A. time-domain signal y is tested to two sensors1(t) and y2(t) Fourier transformation is carried out:
B. the time-domain signal y of two sensors is calculated1(t) and y2(t) correlation function Ry1y2(τ):
C. the time-domain signal y of two sensors is calculated1(t) and y2(t) crosspower spectrum function Sy1y2(f):
D. phase is calculatedFunction:
E. it calculates rock-soil layer different frequency and vibrates corresponding damping ratio:
Wherein:
A1(f)、A2It (f) is respectively the measuring point particle amplitude of the first instrument connection (2), the second instrument connection (3)；
R1, R2 are respectively the first instrument connection (2) measuring point, the second instrument connection (3) measuring point at a distance from the pore electrod that impulses (4)；
t1: propagation time of the stress wave between two instrument connections；
T: the period of wave.
Preferably, the exciting hole and the first, second instrument connection are vertical hole.
Further, it is the accurate distance determined between sensor, bore inclining test is carried out before the drilling formal test.
Preferably, the spark source electrode and sensor are on same elevation.If rock-soil layer is inclined, electrical fire
Flower focus electrode and sensor can not also be on the same elevations, but line should be straight line.
It preferably, is the accuracy for guaranteeing the dynamic signal phase of each sensor institute's vibration measuring, the control and data collecting instrument
Each sensor passage synchronous carry out data acquisition.
Preferably, the top of the controllable direction sensor device is equipped with hanging ring, and the hanging ring is indicated with scale
Wirerope connection, sensor device moved in the borehole by wirerope.
Preferably, what the vibration that spark source electrode generates was made of the harmonic wave of multiple and different frequencies and amplitude, be
It determines relationship between the amplitude and phase and frequency of each harmonic wave, Fourier transformation and mutually is carried out to vibration time-domain signal collected
Thus correlation analysis obtains the corresponding damping ratio of vibration of different frequency.
The present invention is that its hammer vibration energy is controllable using the purpose of spark source, and its excited vibrational low-frequency component energy
Height, dominant frequency and seismic wave dominant frequency are close, therefore the vibration of spark source excitation can preferably simulation seismic wave be in the earth formation
Propagation.The test object of the test method is live rock-soil layer, and the sensor being mounted in instrument connection can be according to survey
Examination needs accurate adjustment orientation, therefore can test the damping ratio of rock-soil layer each depth and direction.The analysis method can
To calculate the corresponding damping ratio of vibration of Rock And Soil layer different frequency.
Compared with prior art, the present invention having the following advantages that and effect:
Firstly, the innovation of test method.Damping ratio be reflection vibration in communication process due to the interior friction of material and its
The index of energy dissipation caused by it is hindered, the present invention is by test vibration from focus different distance particle on same survey line
Oscillation Amplitude variation calculates damping ratio, is the truly expressed to damping ratio concept, and the method to be decayed at present using particle vibration,
Rock mass is generalized as the spring with damping, analysis free damping rule determines damping ratio；Or by dynamically load to add unloading it is stagnant
Loop analysis calculates damping ratio according to energy absorption and release relationship, these methods weaken the behavioral characteristics of damping.
Secondly, test object has extensive representativeness.Test object of the present invention be comprising a certain range under natural conditions
Rock And Soil, and the Rock And Soil of different depth can be tested.Laboratory test test object is spot sampling at present, experiment
Room sample preparation, subjects are inevitably disturbed or even test object inherently remolds sample, are to live Rock And Soil
A kind of simple representative, can not reflect the complexity of Rock-soil Mass Structure and local environment；Although live exciter test test object
It is also original state ground, but its result only represents the behavioral characteristics of small range Rock And Soil near exciting block, and cannot reflects ground
The behavioral characteristics of the following rock-soil layer of table.
Furthermore test result is true and reliable.The obtained damping ratio of the present invention and frequency relation really reflect Rock And Soil
Vibration characteristics, existing test method all assumes that the damping ratio of Rock And Soil is unrelated with vibration frequency, is not inconsistent with actual conditions.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of the on-site testing device of Rock And Soil dynamic parameter damping ratio.
Fig. 2 is the structural schematic diagram of the sensor device in controllable direction.
Wherein: 1- exciting hole, the first instrument connection of 2-, the second instrument connection of 3-, 4- spark source electrode, 5- high pressure
Controller, 6- first can control the sensor device in direction, and 7- second can control the sensor device in direction, 8- control and
Data collecting instrument, 9- computer, 10- inflated hose, 11- wirerope, 12- lower bottom base, 13- upper bed-plate, 14- air bag,
15- decelerating motor, 16- push-rod electric machine, 17- sensor, 18- electronic compass, 19- supporting boot, 20- hanging ring.
Fig. 3 is that sensors X direction vibrates time-domain curve figure in embodiment 2.
Fig. 4 is to calculate resulting damping ratio and frequency relation scatter plot in embodiment 2.
Specific embodiment
Below according to attached drawing, present invention is further described in detail:
Embodiment 1:
As shown in Figure 1, a kind of on-site testing device of Rock And Soil dynamic parameter damping ratio, it includes spark source electrode
4, dual pressure controller 5, the sensor device 6 in the first controllable direction, the second controllable direction sensor device 7, control and
Data collecting instrument 8, computer 9 can be divided into four subsystems:
Excitation system: it is shaken using spark source as excitation system, including dual pressure controller 5 (XW512C), electric spark
Source electrode 4 (common), dual pressure controller 5 are connected with spark source electrode 4 by coaxial cable, and spark source electrode 4 is set
In exciting hole 1；It is that its hammer vibration energy is controllable using the purpose of spark source, and its excited vibrational low-frequency component energy
Height, dominant frequency and seismic wave dominant frequency are close, therefore the vibration of spark source excitation can preferably simulation seismic wave be in the earth formation
Propagation；
Sensing system: due to needing to test the Vibration propagation rule along drilling line direction, the direction of sensor is necessary
Keep consistent with drilling line direction, therefore using the sensor device in controllable orientation, the sensor dress in the first controllable direction
The sensor device 7 for setting the 6, second controllable direction is individually fixed in the first instrument connection 2, in the second instrument connection 3, passes through integrated line
Cable is connected with control and data collecting instrument 8；The sensor device in the controllable direction includes lower bottom base 12, upper bed-plate 13,
Upper bed-plate 13 includes push-rod electric machine 16 (A58SW31ZY), sensor 17 (velocity sensor TCS-B3), electronic compass 18
(DCM220B), supporting boot 19, supporting boot 19 is located at the two sides of upper bed-plate, and is fixedly connected with the push rod of push-rod electric machine 16, passes through
Push-rod electric machine 16 pushes supporting boot 19, and upper bed-plate 13 is fixed on hole wall, and sensor 17 is located at the top of push-rod electric machine 16, electricity
Sub- compass 18 is fixed on the top of sensor 17, and the X of sensor 17, Y-direction are consistent with the X of electronic compass 18, Y-direction；Bottom
Seat 12 includes air bag 14, decelerating motor 15 (JGY-2838), and air bag 14 is equipped with aeration aperture, and air bag 14 is wrapped in the side of lower bottom base 12
Wall inflates air bag 14 by the inflated hose 10 being connected on stomata, the lower bottom base 12 of sensor device is made to be fixed on drilling
Designated depth, decelerating motor 15 is fixed on the center of lower bottom base；The axis and upper bed-plate 13 of lower bottom base decelerating motor 15 are fixed to be connected
It connects, decelerating motor 15 is rotated by control and data collecting instrument 8 and electronic compass 18 and determines the direction of sensor 17；The biography
Sensor arrangement is moved in the borehole by the wirerope 11 of connection hanging ring 20, and wirerope 11 is indicated with scale.
Control and data collection system: control and data collecting instrument 8 (DASP) have to sensor orientation control function and
Sensor vibration Signals collecting function, control and data collecting instrument 8 pass through coaxial cable and spark source dual pressure controller 5
The connection of synchronism output interface, the sensor device 6 in the first controllable direction, the sensor device 7 in the second controllable direction pass through
The corresponding interface of cable access control and data collecting instrument 8, computer 9 are connect by USB line with control and data collecting instrument 8；
Data acquisition and analysis system: including computer 9 and acquisition software (COIN DASP V10), which can be completed
Time domain data acquisition, and have and acquired data are filtered, quick Fourier analysis, autocorrelation analysis, cross-correlation point
The functions such as analysis, Cross Spectra Analysis.
The present invention provides a kind of device of rock-soil layer scene damping ratio testing method, its packet spark source electrode 4 is high
Pressure controller 5, the sensor device 6 in the first controllable direction, the second controllable direction sensor device 7, control and data
Acquisition Instrument 8, computer 9.Its connection relationship is: spark source electrode 4 is placed in exciting hole, spark source electrode 4 and height
Pressure controller 5 is connected by coaxial cable；Control and data collecting instrument 8 are synchronous defeated with dual pressure controller 5 by coaxial cable
Outgoing interface connection can control the sensor device 6,7 in direction to access the interface of control and data collecting instrument 8 by cable respectively,
Computer 9 is connect by USB line with control and data collecting instrument 8.
Embodiment 2:
A kind of on-the-spot test method of Rock And Soil dynamic parameter damping ratio, the steps include:
1) it drills in test site, the quantity of drilling is three, and three drillings must be in the same section
On, respectively exciting hole 1, the first instrument connection 2, the second instrument connection 3, drilling into needs in rock-soil layer to be tested；
2) spacing of wells is determined to be accurate, bore inclining is tested with clinograph (SINCO)；
3) spark source electrode 4 is put at the test depth in exciting hole 1 by the (depth where tested Rock And Soil by cable
Degree), the synchronism output interface of dual pressure controller 5 passes through coaxial with the synchronous input interface of control and data collecting instrument 8 (DASP)
Cable is connected；
4) sensor device 6 in the first controllable direction is put by (quilt at the test depth of instrument connection 2 by integrated cable
Survey the depth where Rock And Soil), air bag 14 is inflated by inflated hose 10, makes the sensor device 6 in the first controllable direction
Lower bottom base 12 be fixed at the test depth of the first instrument connection 2 (tested Rock And Soil where depth)；
5) bottom of the sensor 7 in the second controllable direction is fixed in the second instrument connection 3 according to step 4) the method
Seat；
6) sensor device 7 in the sensor device 6 in the first controllable direction, the second controllable direction is distinguished
It is connected with control and 8 the corresponding interface of data collecting instrument, control and data collecting instrument 8 are connected by USB line with computer 9；
7) azimuth for passing through compass testing bore holes aperture line adjusts the first controllable direction by decelerating motor 15
Sensor device 6, the second controllable direction sensor device 7 upper bed-plate 13, make the X-direction and drilling of the sensor
Line direction is consistent, stretches out supporting boot 19 by push-rod electric machine 16, can by the sensor device 6, second in the first controllable direction
The upper bed-plate 13 for controlling the sensor device 7 in direction is separately fixed on the hole wall of the first instrument connection 2 and the second instrument connection 3；
8) dual pressure controller 5 charges, and control and data collecting instrument 8 are in acquisition wait state；
9) dual pressure controller 5 discharges, and generates pinking, control and data collecting instrument 8 and the preservation first of the record of computer 9 is controllable
The vibration information of the sensor device 6 in direction processed, the sensor device 7 in the second controllable direction；
10) data of acquisition are handled, calculates rock-soil layer different frequency and vibrates corresponding damping ratio, viscous damping ratio
D is found out by following formula:
Wherein:
A1, A2 are respectively the measuring point particle amplitude of the first instrument connection 2, the second instrument connection 3；
R1, R2 are respectively 2 measuring point of the first instrument connection, 3 measuring point of the second instrument connection at a distance from 1 electrode of hole that impulses；
t1: propagation time of the stress wave between two instrument connections；
T: the period of wave
Above-mentioned formula is only for simple harmonic oscillation, the i.e. single vibration of frequency, since spot sensor received signal is
Multi-frequency vibrations synthesis, amplitude A and phase are all the functions of frequency f.Fourier transformation is carried out to vibration signal, it can be with
Obtain A~f relationship:
By y1(t) and y2(t) crosspower spectrum function:
Available phaseFunction:
Wherein: correlation functionAre as follows:
By carrying out the above analysis to two sensor received signals, obtained not finally by damping ratio calculation formula
The damping ratio D of rock-soil layer under same frequency.
Spark source electrode 4 and two sensor devices 6,7 must be on same straight lines (if rock-soil layer is to incline
Oblique, spark source electrode and sensor can not be on the same elevations, but line equally should be straight line), two sensings
Rock-soil layer between device is test object, it is preferred to use vertical drilling.
To guarantee that each biography of the accuracy of signal phase, the control and data collecting instrument 8 is moved in 17 vibration measurings of sensor
Sensor Channel Synchronous carries out data acquisition.
Applicating example:
Certain engineering ground stratum is mainly made of silty clay, granite gneiss, amphibolite and diorite-porphyrite, wherein
Based on granite gneiss, amphibolite and diorite-porphyrite are distributed basement rock in dyke rock shape.For the resistance for testing granite gneiss layer
Buddhist nun's ratio, in the vertical drilling that 3 diameters of Ground arrangement are 90mm, respectively ZK1, ZK2 and ZK3, wherein ZK1 is focus hole, ZK2
It is instrument connection with ZK3,3 drillings are arranged in a linear, and pitch-row 3000mm, drilling depth 19m enter 15 meters of granite gneiss layer,
This measuring point depth is 8m and 11m.Before test, each bore inclining situation is tested using SINCO inclinometer first, with standard
The really distance between measurement measuring point, then testing bore holes line azimuth, finally places spark source, sensor, and to sensing
Device angle is adjusted, and keeps its X-direction consistent with drilling line direction.DASP control and sampler for data, sample frequency are set
For 1000Hz, duration 2s is sampled, when spark source electric discharge, DASP while the vibration information for recording two sensors, two
It is as shown in Figure 3 that sensors X direction vibrates time-domain curve.
Fourier transformation first is carried out to the X-direction vibration signal of two sensors, obtains A1 (f) and A2 (f), then calculate
The correlation function and crosspower spectrum function of the X-direction vibration signal of two sensors, obtain phaseFunction finally calculates
T1/T out substitutes into damping ratio calculation formula, can obtain the damping ratio under granite gneiss different frequency.Fig. 4 is to be calculated
The damping ratio and frequency relation scatter plot of granite gneiss can be obtained damping ratio and frequency relation fitting are bent by regression analysis
Line, curve show a damping ratio not instead of steady state value, increase and increased changing value, test result and reality with frequency
It is consistent.
Claims (5)
1. a kind of on-site testing device of Rock And Soil dynamic parameter damping ratio, including spark source electrode (4), dual pressure controller
(5), the sensor device (6) in the first controllable direction, the sensor device (7) in the second controllable direction, control and data are adopted
Collect instrument (8), computer (9), it is characterised in that: spark source electrode (4) is placed in exciting hole (1), spark source electrode
(4) it is connected with dual pressure controller (5) by coaxial cable；Control and data collecting instrument (8) pass through coaxial cable and high voltage control
The synchronism output interface of device (5) connects, and the sensor device (6) in the first, second controllable direction, (7) are accessed by cable to be controlled
The interface of system and data collecting instrument (8), computer (9) are connect by USB line with control and data collecting instrument (8)；Described can
The sensor device in control direction is individually fixed in the first instrument connection (2), in the second instrument connection (3), can control the sensing in direction
Device device includes lower bottom base (12), upper bed-plate (13), and lower bottom base (12) includes air bag (14), decelerating motor (15), air bag (14)
Equipped with aeration aperture, air bag (14) is wrapped in the side wall of lower bottom base (12), and decelerating motor (15) is fixed on the center of lower bottom base (12),
The axis of decelerating motor (15) is fixedly connected with upper bed-plate (13), and upper bed-plate (13) includes push-rod electric machine (16), sensor (17), electricity
Sub- compass (18), supporting boot (19), supporting boot (19) are located at the two sides of upper bed-plate (13), and solid with the push rod of push-rod electric machine (16)
Fixed connection, sensor (17) are located at the top of push-rod electric machine (16), and electronic compass (18) is fixed on the top of sensor (17), pass
The X of sensor (17), Y-direction are consistent with the X of electronic compass (18), Y-direction.
2. a kind of on-site testing device of Rock And Soil dynamic parameter damping ratio according to claim 1, which is characterized in that institute
The sensor device (6) in the controllable direction of first stated, the top of the sensor device (7) in the second controllable direction are equipped with hanging ring
(20), the wirerope (11) equipped with scale mark is connected with hanging ring (20).
3. a kind of on-the-spot test method of Rock And Soil dynamic parameter damping ratio, the steps include:
1) it drills in test site, drilling hole amount is three, and three drillings are in the same section, respectively exciting
Hole (1), the first instrument connection (2), the second instrument connection (3), drill into the rock-soil layer of test；
2) the spark source electrode (4) in on-site testing device described in claim 1 is put into the specified depth in exciting hole (1)
Degree, the first, second controllable direction sensor device (6), (7) are respectively put into the first instrument connection (2), the second instrument connection (3)
On same straight line, described is specified for designated depth, spark source electrode (4) and two sensor devices (6), (7)
Depth is depth where tested Rock And Soil；
3) azimuth for using electronic compass testing bore holes line, adjusts the direction of sensor (17), makes its X-direction and drilling line
Direction is consistent；
4) dual pressure controller (5) charges, and control and data collecting instrument (8) are in acquisition wait state；
5) dual pressure controller (5) discharges, and generates pinking, control and data collecting instrument (8) and computer (9) record saves each biography
The vibration information of sensor；
6) data of acquisition are handled according to the following steps, calculate rock-soil layer different frequency and vibrates corresponding damping ratio:
A. time-domain signal y is tested to two sensors1(t) and y2(t) Fourier transformation is carried out:
B. the time-domain signal y of two sensors is calculated1(t) and y2(t) correlation function Ry1y2(τ):
C. the time-domain signal y of two sensors is calculated1(t) and y2(t) crosspower spectrum function Sy1y2(f):
D. phase is calculatedFunction:
E. it calculates rock-soil layer different frequency and vibrates corresponding damping ratio:
Wherein:
A1(f)、A2It (f) is respectively the measuring point particle amplitude of the first instrument connection (2), the second instrument connection (3)；
R1, R2 are respectively the first instrument connection (2) measuring point, the second instrument connection (3) measuring point at a distance from the pore electrod that impulses (4)；
t1: propagation time of the stress wave between two instrument connections；
T: the period of wave.
4. the on-the-spot test method of Rock And Soil dynamic parameter damping ratio according to claim 3, it is characterised in that:
The exciting hole (1) and the first instrument connection (2), the second instrument connection (3) are vertical hole.
5. the on-the-spot test method of Rock And Soil dynamic parameter damping ratio according to claim 3, which is characterized in that
The control and data collecting instrument is to each measuring point synchronized sampling.
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