CN108398180A - A kind of experimental rig, system and test method measuring coarse-grained soil shear wave velocity - Google Patents
A kind of experimental rig, system and test method measuring coarse-grained soil shear wave velocity Download PDFInfo
- Publication number
- CN108398180A CN108398180A CN201810234567.3A CN201810234567A CN108398180A CN 108398180 A CN108398180 A CN 108398180A CN 201810234567 A CN201810234567 A CN 201810234567A CN 108398180 A CN108398180 A CN 108398180A
- Authority
- CN
- China
- Prior art keywords
- coarse
- grained soil
- shell
- shear wave
- friction element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H5/00—Measuring propagation velocity of ultrasonic, sonic or infrasonic waves, e.g. of pressure waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0284—Bulk material, e.g. powders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of experimental rig, system and test method measuring coarse-grained soil shear wave velocity, including shell, friction element, piezo electric stack and acceleration transducer；The vertical section of friction element is "T"-shaped, " T " shaped horizontal ends are fixed on the top of shell, " T " shaped vertical end is inserted into shell by the top of shell and is fixed with acceleration transducer and piezo electric stack in the "T"-shaped vertical end of friction element, while piezo electric stack is fixedly connected with the madial wall of shell；Friction element is equipped with concave-convex clathrate rubbing surface in the upper surface of "T"-shaped horizontal ends.The experimental rig of the present invention solves the problems, such as piezoelectric material destructible and traditional flexure element and problem that coarse-grained soil degree of coupling is poor, cannot achieve large-scale three axis coarse-grained soil specimen shear wave velocities measures in Large-scale Triaxial Experiments sample compacting and condition of high ground stress loading procedure；The test system architecture connection and reasonable arrangement of the present invention, assembly is simple, test operation is convenient.
Description
Technical field
The present invention relates to soil mechanics Triaxial tester and test method, especially a kind of measurement coarse-grained soil shear wave velocity
Experimental rig, system and test method.
Background technology
Soil body shear wave velocity is one of the key parameter of soil mechanics research and geotechnical engineering design, is dividing stratum and place
Liquefaction, the sunken sedimentation of soil matrix shake, seismic response analysis, calculating rock-soil dynamics parameter and the research that great soil group is other, judges sand are native
Vibration characteristics of body etc. has great importance.
Since Shirley in 1978 etc. uses the shear wave velocity that piezoelectric ceramic bending element tests kaolin sample for the first time,
Since its test philosophy is clear, method simple, intuitive, it is widely used in the rooms such as triaxial apparatus, consolidation apparatus, direct shear apparatus, Resonant Column
On interior instrument.Flexure element usually by two panels can the piezoceramics crystal piece of longitudinal extension be bonded with metal stiffener layer, with outstanding
Arm beam form is mounted on sample both ends, and one is used as excitation element, another is as receiving element.When experiment, excitation member is in arteries and veins
It rushes under voltage and generates shearing wave, shearing wave reaches reception member after earth propagation, and will receive member by data acquisition device generates
Vibration be converted into electric signal, can obtain propagation time of shearing wave, being counted according to soil sample length by electric signal comparison
Calculate the shear wave velocity of the soil body.However, flexure element method is difficult to realize the test of coarse-grained soil shear wave velocity, main cause has：When
Coarse soil particles grain size is larger, and it is poor that flexure element is inserted coupled degree；Second is that in Large-scale Triaxial Experiments sample compacting
And in condition of high ground stress loading procedure, the piezoelectric materials such as flexure element are highly vulnerable to breakage；Third, excitation member is generating the same of shearing wave
When, can generate the judgement of shearing wave initial time dry in both sides generation compressional wave, the compressional wave reflected from balancing gate pit's side wall
It disturbs.
The survey that the devices such as oscillator, piezoelectric ring carry out soil-stone assorted foundation is cut in recent years, occurring turning round both at home and abroad in succession
Examination, but completed in small triaxial test or consolidation test.In addition, existing interior shear wave velocity measuring technique generally use
Single excitation-reception mode is difficult to accurately obtain the practical fortune of excitation element and receiving element in soil sample during experiment
Dynamic behavior, to exciting the Study on dynamic response of element-soil sample-receiving element whole system to cause difficulty.It can be seen that at present
There is an urgent need for a kind of laboratory testing rigs and method that can test coarse-grained soil shear wave velocity.
Invention content
The object of the present invention is to provide it is a kind of it is reasonable for structure, assembly is simple, test operation facilitates and solves piezoelectric material and exists
Destructible and traditional flexure element couple journey with coarse-grained soil in Large-scale Triaxial Experiments sample compacting and condition of high ground stress loading procedure
Spend the experiment of measurement coarse-grained soil shear wave velocity that is poor, cannot achieve the defects of large-scale three axis coarse-grained soil specimen shear wave velocities measure
Device, system and test method.
The present invention solves technical solution used by prior art problem：A kind of experiment dress measuring coarse-grained soil shear wave velocity
It sets, including shell, friction element, piezo electric stack and acceleration transducer；The shell is the shell that lower end opens, the friction
The vertical section of unit is "T"-shaped, and " T " shaped horizontal ends are fixed on the top of shell, and " T " shaped vertical end is inserted by the top of shell
Enter in shell and is fixed with acceleration transducer and piezo electric stack, while piezo electric stack in the "T"-shaped vertical end of friction element
It is fixedly connected with the madial wall of shell；Friction element is equipped with concave-convex clathrate rubbing surface in the upper surface of "T"-shaped horizontal ends.
Groove is provided at the top of the shell, the "T"-shaped horizontal ends of the friction element are placed in the groove, groove with
The cylindrical slideway being mutually parallel is equipped between the "T"-shaped horizontal ends lower face of friction element；The gap of friction element and groove
Place is tightly connected equipped with O-ring and layer of silica gel.
A kind of pilot system measuring coarse-grained soil shear wave velocity includes the experiment dress of two measurement coarse-grained soil shear wave velocities
It sets：Respectively as excitation end and receiving terminal；The pilot system further include sequentially connected signal generator, power amplifier and
Oscillograph；Meanwhile power amplifier is connect with the piezo electric stack at excitation end；Excite the acceleration transducer at end, the pressure of receiving terminal
The acceleration transducer of pile stack and receiving terminal is connected by charge amplifier with oscillograph respectively.
A kind of test method for the pilot system measuring coarse-grained soil shear wave velocity, includes the following steps：
S1, system installation and check：First by the pilot system excitation end and receiving terminal be respectively embedded into triaxial tester
Among pedestal and top cap and the upper surface of the " T " shaped horizontal ends of excitation end and receiving terminal is made to be oppositely arranged, in pedestal and top cap
The cyclic annular porous disc of place's installation, sealing ring is equipped between the ring-type porous disc and excitation end and the shell of receiving terminal；Then into
Row is checked：Lead to full water in triaxial pressure room, and enabling signal generator generates excitation signal, it is ensured that without receiving terminal on oscillograph
Shearing wave signal；
S2, system delay is determined：The coarse-grained soil specimen of saturation is prepared in triaxial tester, and makes the upper and lower of coarse-grained soil specimen
End face of the both ends of the surface respectively with receiving terminal and the friction element at excitation end fits closely；Conventional consolidation examination is carried out to coarse-grained soil specimen
It tests, by applying different confining pressures to coarse-grained soil specimen, determines corresponding system delay Δt s ；
S3, shear wave velocity measurement is carried out：After coarse-grained soil specimen stabilization by consolidation under current confining pressure, enabling signal generator generates
Excitation signal, the excitation signal arrive separately at oscillography after power amplifier, through the first propagation circuit and the second propagation circuit
Device simultaneously shows the propagation time on oscillograph;The first propagation circuit is that excitation signal after power amplifier directly show by arrival
Wave device, the second propagation circuit are that excitation signal is put after power amplifier through excitation end, coarse-grained soil specimen, receiving terminal and charge
Oscillograph is reached after big device, the time difference that circuit and the second propagation circuit arrival oscillograph are propagated through first is the practical survey of signal
Measure time difference Δt r ；The Real-time Monitoring Data of acceleration transducer in excitation end and receiving terminal is shown in oscillograph；
S4, shear wave velocity calculate：The system delay Δ obtained according to step S2 and S3t s Time difference Δ is measured with practicalt r , cut
It is Δ that wave, which is cut, by the propagation time of coarse-grained soil speciment=Δt r -Δt s , and then determine that the shear wave velocity of coarse-grained soil specimen isL/Δt, whereinLFor the height of coarse-grained soil specimen.
Isotonic consolidation confining pressure ranging from 100~1000kPa applied in routine consolidation test；Apply successively from small to large
Confining pressure.
The beneficial effects of the present invention are：The experimental rig of the present invention by the shape of friction element by being designed as vertical section
To be "T"-shaped, and piezo electric stack is fixed in "T"-shaped vertical end, the extensional vibration of piezo electric stack is converted into planar horizontal vibration, it is real
The scissoring vibration excitation for having showed three axis sample end plane of coarse-grained soil, solves piezoelectric material in Large-scale Triaxial Experiments sample compacting
With the problem of destructible in condition of high ground stress loading procedure and traditional flexure element and coarse-grained soil degree of coupling it is poor, cannot achieve
The problem that large-scale three axis coarse-grained soil specimen shear wave velocities measure；By in the fixed acceleration transducer of "T"-shaped vertical end to rubbing
The vibration behavior for wiping unit is monitored in real time, is contributed to exciting end-coarse-grained soil specimen-receiving terminal whole system dynamic response
Research.The test system architecture connection and reasonable arrangement of the present invention, assembly is simple, test operation is convenient.The test method of the present invention can
Strong operability has good promotional value.
Description of the drawings
Fig. 1 is the structural schematic diagram of the experimental rig of the present invention.
Fig. 2 is the structure connection diagram of the pilot system of the present invention at the trial.
Fig. 3 is the attachment structure schematic diagram of the experimental rig and triaxial tester of the present invention.
In figure：1- shells, 2- friction elements, 3- piezo electric stacks, 4- acceleration transducers, 5- cylindrical slideways, 6-O types
Circle, 7- layer of silica gel, 8- excitation end, 9- receiving terminals, 10- signal generators, 11- power amplifiers, 12- charge amplifiers, 13- show
Wave device, 14- coarse-grained soil specimens, 15- triaxial testers, 16- triaxial testers pedestal, 17- triaxial testers top cap, 18- are permeable
Plate, 19- sealing rings, the triaxial cells 20-.
Specific implementation mode
Below in conjunction with the drawings and the specific embodiments, the present invention will be described：
Fig. 1 is a kind of structural schematic diagram for the experimental rig measuring coarse-grained soil shear wave velocity of the present invention.A kind of measurement coarse-grained soil is cut
Cut the experimental rig of velocity of wave, including shell 1, friction element 2, piezo electric stack 3 and acceleration transducer 4；Shell 1 opens for lower end
Shell, the vertical section of friction element 2 is "T"-shaped, and " T " shaped horizontal ends are fixed on the top of shell 1, " T " shaped vertical end
It is inserted into shell 1 by the top of shell 1.Specifically, groove, the "T"-shaped horizontal ends of friction element 2 are provided at the top of shell 1
It is placed in the groove, the cylinder being mutually parallel is equipped between groove and the "T"-shaped horizontal ends lower face of friction element 2 and is led
Rail 5（It is preferably provided with six）, the setting one of the cylindrical slideway 5 is provided a supporting role for friction element 2；Second is that reducing friction
Unit 2 generates the resistance of small horizontal movement during the test.To ensure globality and the sealing of friction element 2 and groove
Property, friction element 2 uses the layer of silica gel 7 with certain deflection at the gap of groove equipped with the sealing of O-ring 6, remaining gap
Carry out waterproof sealing filling.It is fixed with and is added using epoxy resin in the "T"-shaped vertical end of the friction element 2 in being inserted into shell 1
Velocity sensor 4 and piezo electric stack 3, while piezo electric stack 3 is fixedly connected with the madial wall of shell 1；Friction element 2 is "T"-shaped
The upper surface of horizontal ends is equipped with concave-convex clathrate rubbing surface, and ability is engaged with increase friction element 2 and the soil body.
Fig. 2 shows the pilot systems that application measures the experimental rig of coarse-grained soil shear wave velocity, using two measurement coarse grain
The experimental rig of native shear wave velocity, respectively as excitation end 8 and receiving terminal 9；It further include sequentially connected signal in pilot system
Generator 10, power amplifier 11 and oscillograph 13；Meanwhile power amplifier 11 is connect with the piezo electric stack 3 at excitation end 8, is swashed
Acceleration transducer 4, the piezo electric stack 3 of receiving terminal 9 and the acceleration transducer 4 of receiving terminal 9 of originator 8 are put by charge respectively
Big device 12 is connected with oscillograph 13.
The operation principle of pilot system of the present invention is as follows：After signal generator 10 starts, certain frequency is sent out
Voltage pulse is input to the piezoelectric pile in excitation end 8 as excitation signal, the excitation signal after the amplification of power amplifier 11
Stack 3；Piezo electric stack 3 generates extensional vibration, and then extensional vibration is converted to planar horizontal vibration by friction element 2, realizes thick
The scissoring vibration excitation of grain 14 end plane of soil sample, generates shearing wave, while exciting the acceleration transducer 4 in end 8 to swashing
The Vibration Condition of friction element 2 is monitored in real time in originator 8.Piezo electric stack 3 in receiving terminal 9 will pass through coarse-grained soil specimen 14
The shearing wave transmitted is changed into electric signal, shows and is stored on oscillograph 13 after charge amplifier 12, can obtain in this way
To excitation signal by the forward and backward correction data of coarse-grained soil specimen 14.Meanwhile in receiving terminal 9 friction element 2 vibration behavior
It is acquired also by the acceleration transducer 4 in receiving terminal 9, by being shown in real time on oscillograph 13 after charge amplifier 12
Show, to provide the real-time monitoring to 9 Vibration Condition of receiving terminal.
A kind of test method for the pilot system measuring coarse-grained soil shear wave velocity, includes the following steps：
S1, system installation and check：As shown in Figure 2 and Figure 3, by pilot system excitation end 8 and receiving terminal 9 be respectively embedded into three
Among the pedestal 16 and top cap 17 of shaft experiment instrument 15 and keep excitation end 8 opposite with the upper surface of " T " shaped horizontal ends of receiving terminal 9
Setting, the cyclic annular porous disc 18 of installation at pedestal 16 and top cap 17, cyclic annular porous disc 18 and the shell 1 of excitation end 8 and receiving terminal 9 it
Between be equipped with sealing ring 19.Then it is checked：Full water will be led in triaxial cell 20, and enabling signal generator is sent out respectively
Frequency is the excitation signal of 1kHz, 5kHz and 10kHz.Since water can not bear shear stress, it should not be deposited on oscillograph 13
In the shearing wave signal of receiving terminal 9, and if it exists, then check shearing wave whether by the metal structure around triaxial tester 15 into
Row is propagated, last it is ensured that the shearing wave signal without receiving terminal 9 on oscillograph 13.
S2, system delay is determined：It presses《Earthwork test rule》（SL237-1999）Middle conventional methods prepare saturation
The top end face of coarse-grained soil specimen 14, the upper/lower terminal and friction element 2 in excitation end 8 and receiving terminal 9 of coarse-grained soil specimen 14 is close
Fitting carries out routine consolidation test to the coarse-grained soil specimen 14 in triaxial tester 15, by applying not to coarse-grained soil specimen 14
Same confining pressure, determines corresponding system delay Δt s .The isotonic consolidation confining pressure ranging from 100~1000kPa wherein preferably applied,
Apply confining pressure successively from small to large, carries out shear wave velocity measurement after stabilization by consolidation under certain confining pressure, then carry out next stage
The consolidation of confining pressure, and so on.
S3, shear wave velocity measurement is carried out：After the stabilization by consolidation under current confining pressure of coarse-grained soil specimen 14, enabling signal occurs
Device 10 generates excitation signal, which propagates circuit and second after power amplifier 11, through first and propagate circuit point
It is clipped to up to oscillograph 13 and shows the propagation time on oscillograph 13, wherein the first propagation circuit is that excitation signal is put through power
Oscillograph 13 is directly reached after big device 11, the second propagation circuit is for excitation signal through exciting end 8, coarse grain after power amplifier 11
Oscillograph 13 is reached after soil sample 14, receiving terminal 9 and charge amplifier 12, is arrived through the first propagation circuit and the second propagation circuit
Time difference up to oscillograph 13 is the practical measurement time difference Δ of signalt r ；In addition, showing acceleration sensing simultaneously in oscillograph 13
The Real-time Monitoring Data of device 4, with provide to friction element 2 with the vibration behavior in 14 interaction process of coarse-grained soil specimen
Monitoring.
S4, shear wave velocity calculate：The system delay Δ obtained according to step S2 and S3t s Time difference Δ is measured with practicalt r , obtain
The propagation time for passing through coarse-grained soil specimen to shearing wave is Δt=Δt r -Δt s , and then determine that the shear wave velocity of coarse-grained soil specimen isL/Δt, whereinLFor the height of coarse-grained soil specimen.
The above content is combine specific optimal technical scheme it is made for the present invention be further described, and it cannot be said that
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention's
Protection domain.
Claims (5)
1. a kind of experimental rig measuring coarse-grained soil shear wave velocity, which is characterized in that including shell, friction element, piezo electric stack
And acceleration transducer；The shell is the shell that lower end opens, and the vertical section of the friction element is "T"-shaped, " T " shaped water
Flush end is fixed on the top of shell, and " T " shaped vertical end is inserted into shell by the top of shell and is hung down in the "T"-shaped of friction element
Acceleration transducer and piezo electric stack are fixed in straight end, while piezo electric stack is fixedly connected with the madial wall of shell；Friction is single
Member is equipped with concave-convex clathrate rubbing surface in the upper surface of "T"-shaped horizontal ends.
2. a kind of experimental rig measuring coarse-grained soil shear wave velocity according to claim 1, which is characterized in that the shell
Top be provided with groove, the "T"-shaped horizontal ends of the friction element are placed in the groove, in the "T"-shaped of groove and friction element
The cylindrical slideway being mutually parallel is equipped between horizontal ends lower face；O-ring and silicon are equipped at the gap of friction element and groove
Glue-line is tightly connected.
3. a kind of pilot system measuring coarse-grained soil shear wave velocity, which is characterized in that including two measurement coarse-grained soil shear wave velocities
Experimental rig：Respectively as excitation end and receiving terminal；The pilot system further includes sequentially connected signal generator, power
Amplifier and oscillograph；Meanwhile power amplifier is connect with the piezo electric stack at excitation end；It excites the acceleration transducer at end, connect
The piezo electric stack of receiving end and the acceleration transducer of receiving terminal are connected by charge amplifier with oscillograph respectively.
4. a kind of test method of pilot system measuring coarse-grained soil shear wave velocity according to claim 3, feature exist
In including the following steps：
S1, system installation and check：First by the pilot system excitation end and receiving terminal be respectively embedded into triaxial tester
Among pedestal and top cap and the upper surface of the " T " shaped horizontal ends of excitation end and receiving terminal is made to be oppositely arranged, in pedestal and top cap
The cyclic annular porous disc of place's installation, sealing ring is equipped between the ring-type porous disc and excitation end and the shell of receiving terminal；Then into
Row is checked：Lead to full water in triaxial pressure room, and enabling signal generator generates excitation signal, it is ensured that without receiving terminal on oscillograph
Shearing wave signal；
S2, system delay is determined：The coarse-grained soil specimen of saturation is prepared in triaxial tester, and makes the upper and lower of coarse-grained soil specimen
End face of the both ends of the surface respectively with receiving terminal and the friction element at excitation end fits closely；Conventional consolidation examination is carried out to coarse-grained soil specimen
It tests, by applying different confining pressures to coarse-grained soil specimen, determines corresponding system delay Δt s ；
S3, shear wave velocity measurement is carried out：After coarse-grained soil specimen stabilization by consolidation under current confining pressure, enabling signal generator generates
Excitation signal, the excitation signal arrive separately at oscillography after power amplifier, through the first propagation circuit and the second propagation circuit
Device simultaneously shows the propagation time on oscillograph;The first propagation circuit is that excitation signal after power amplifier directly show by arrival
Wave device, the second propagation circuit are that excitation signal is put after power amplifier through excitation end, coarse-grained soil specimen, receiving terminal and charge
Oscillograph is reached after big device, the time difference that circuit and the second propagation circuit arrival oscillograph are propagated through first is the practical survey of signal
Measure time difference Δt r ；The Real-time Monitoring Data of acceleration transducer in excitation end and receiving terminal is shown in oscillograph；
S4, shear wave velocity calculate：The system delay Δ obtained according to step S2 and S3t s Time difference Δ is measured with practicalt r , cut
It is Δ that wave, which is cut, by the propagation time of coarse-grained soil speciment=Δt r -Δt s , and then determine that the shear wave velocity of coarse-grained soil specimen isL/Δt, whereinLFor the height of coarse-grained soil specimen.
5. a kind of test method of pilot system measuring coarse-grained soil shear wave velocity according to claim 4, feature exist
In isotonic consolidation confining pressure ranging from 100~1000kPa applied in routine consolidation test；Apply confining pressure successively from small to large.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810234567.3A CN108398180B (en) | 2018-03-21 | 2018-03-21 | Test device, system and test method for measuring shear wave velocity of coarse-grained soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810234567.3A CN108398180B (en) | 2018-03-21 | 2018-03-21 | Test device, system and test method for measuring shear wave velocity of coarse-grained soil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108398180A true CN108398180A (en) | 2018-08-14 |
| CN108398180B CN108398180B (en) | 2023-04-18 |
Family
ID=63092026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810234567.3A Active CN108398180B (en) | 2018-03-21 | 2018-03-21 | Test device, system and test method for measuring shear wave velocity of coarse-grained soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108398180B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649287A (en) * | 2021-01-18 | 2021-04-13 | 大连理工大学 | External excitation test device, test system and method for measuring shear wave velocity of soil body in large-scale triaxial test |
| CN113029755A (en) * | 2021-03-29 | 2021-06-25 | 大连理工大学 | Coarse-grained soil shear wave velocity testing device, testing system and method based on external vibration source excitation |
| CN118549281A (en) * | 2024-05-16 | 2024-08-27 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Dirty railway ballast mechanical characteristics test device based on bending element shear wave speed |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB806767A (en) * | 1956-01-31 | 1958-12-31 | Sperry Prod Inc | Improvements in or relating to means for transmitting and receiving ultrasonic shearwave motion |
| EP0256627A2 (en) * | 1986-08-18 | 1988-02-24 | Conoco Inc. | Apparatus for generating shear waves in an earth medium |
| 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 |
| US20040226380A1 (en) * | 2003-05-13 | 2004-11-18 | Zeng Xiangwu | Measurement of base and subgrade layer stiffness using bender element technique |
| KR100901083B1 (en) * | 2007-11-29 | 2009-06-03 | 한국수자원공사 | A pre-consolidation testing apparatus equipped with shear wave generators and receivers for measuring shear wave velocity distribution of soils |
| CN201724733U (en) * | 2010-07-15 | 2011-01-26 | 宋文梅 | Shear wave velocity detector for triaxial apparatus |
| CN203259425U (en) * | 2013-04-28 | 2013-10-30 | 河海大学 | Large-scale coarse grain material folding ring horizontal circulation simple shear equipment |
| US20150316526A1 (en) * | 2014-04-02 | 2015-11-05 | Colorado School Of Mines | Intelligent pad foot soil compaction devices and methods of using same |
| CN105388219A (en) * | 2015-10-26 | 2016-03-09 | 东南大学 | Piezoelectric ring excitation device for testing granular material shear wave velocity and indoor testing device |
| CN105738479A (en) * | 2016-02-22 | 2016-07-06 | 浙江大学 | Method and device for testing small strain viscoelasticity parameter of geotechnical engineering material through bending elements |
| CN205483774U (en) * | 2016-03-26 | 2016-08-17 | 中国科学院武汉岩土力学研究所 | Unsaturated soil device is jointly tested to crooked unit resonance post |
| CN106949953A (en) * | 2017-04-12 | 2017-07-14 | 郑州中核岩土工程有限公司 | Continuous in-situ measures shear wave velocity of rock soil tester and its method of testing |
| CN107345883A (en) * | 2017-02-22 | 2017-11-14 | 浙江科技学院（浙江中德科技促进中心） | Ludox reinforces the intensive analysis device and method of a wide range of sand |
| CN208350200U (en) * | 2018-03-21 | 2019-01-08 | 大连理工大学 | A kind of experimental rig and system measuring coarse-grained soil shear wave velocity |
-
2018
- 2018-03-21 CN CN201810234567.3A patent/CN108398180B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB806767A (en) * | 1956-01-31 | 1958-12-31 | Sperry Prod Inc | Improvements in or relating to means for transmitting and receiving ultrasonic shearwave motion |
| EP0256627A2 (en) * | 1986-08-18 | 1988-02-24 | Conoco Inc. | Apparatus for generating shear waves in an earth medium |
| US20040226380A1 (en) * | 2003-05-13 | 2004-11-18 | Zeng Xiangwu | Measurement of base and subgrade layer stiffness using bender element technique |
| 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 |
| KR100901083B1 (en) * | 2007-11-29 | 2009-06-03 | 한국수자원공사 | A pre-consolidation testing apparatus equipped with shear wave generators and receivers for measuring shear wave velocity distribution of soils |
| CN201724733U (en) * | 2010-07-15 | 2011-01-26 | 宋文梅 | Shear wave velocity detector for triaxial apparatus |
| CN203259425U (en) * | 2013-04-28 | 2013-10-30 | 河海大学 | Large-scale coarse grain material folding ring horizontal circulation simple shear equipment |
| US20150316526A1 (en) * | 2014-04-02 | 2015-11-05 | Colorado School Of Mines | Intelligent pad foot soil compaction devices and methods of using same |
| CN105388219A (en) * | 2015-10-26 | 2016-03-09 | 东南大学 | Piezoelectric ring excitation device for testing granular material shear wave velocity and indoor testing device |
| CN105738479A (en) * | 2016-02-22 | 2016-07-06 | 浙江大学 | Method and device for testing small strain viscoelasticity parameter of geotechnical engineering material through bending elements |
| CN205483774U (en) * | 2016-03-26 | 2016-08-17 | 中国科学院武汉岩土力学研究所 | Unsaturated soil device is jointly tested to crooked unit resonance post |
| CN107345883A (en) * | 2017-02-22 | 2017-11-14 | 浙江科技学院（浙江中德科技促进中心） | Ludox reinforces the intensive analysis device and method of a wide range of sand |
| CN106949953A (en) * | 2017-04-12 | 2017-07-14 | 郑州中核岩土工程有限公司 | Continuous in-situ measures shear wave velocity of rock soil tester and its method of testing |
| CN208350200U (en) * | 2018-03-21 | 2019-01-08 | 大连理工大学 | A kind of experimental rig and system measuring coarse-grained soil shear wave velocity |
Non-Patent Citations (3)
| Title |
|---|
| HUABEI LIU: "Constitutive modeling of dense gravelly soils subjected tocyclic loading" * |
| 孔宪京: "堆石料尺寸效应研究面临的问题及多尺度三轴试验平台" * |
| 陈建: "基于振动滤波器的压电泵研究" * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649287A (en) * | 2021-01-18 | 2021-04-13 | 大连理工大学 | External excitation test device, test system and method for measuring shear wave velocity of soil body in large-scale triaxial test |
| CN113029755A (en) * | 2021-03-29 | 2021-06-25 | 大连理工大学 | Coarse-grained soil shear wave velocity testing device, testing system and method based on external vibration source excitation |
| CN118549281A (en) * | 2024-05-16 | 2024-08-27 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Dirty railway ballast mechanical characteristics test device based on bending element shear wave speed |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108398180B (en) | 2023-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Thomann et al. | Laboratory Measurement of Small Strain Shear Modulus Under K Conditions | |
| Carpinteri et al. | Critical defect size distributions in concrete structures detected by the acoustic emission technique | |
| CN101560778B (en) | Geophysical prospection stress wave detection method for building foundation pile | |
| CN108663265A (en) | Measure combined type torsion shear apparatus, the system and method for soil body shear wave velocity | |
| Sang et al. | Quantifying fatigue-damage and failure-precursors using ultrasonic coda wave interferometry | |
| CN208350200U (en) | A kind of experimental rig and system measuring coarse-grained soil shear wave velocity | |
| Ishihara et al. | Cyclic strength of imperfectly saturated sands and analysis of liquefaction | |
| Pellet et al. | Damage evaluation with P-wave velocity measurements during uniaxial compression tests on argillaceous rocks | |
| CN108398180A (en) | A kind of experimental rig, system and test method measuring coarse-grained soil shear wave velocity | |
| Wang et al. | Bender element measurement for small-strain shear modulus of compacted loess | |
| CN201653999U (en) | Intelligent ultrasonic transverse wave and longitudinal wave comprehensive tester | |
| Glaser et al. | Body waves recorded inside an elastic half-space by an embedded, wideband velocity sensor | |
| Li et al. | Study of ultrasonic wave characteristics of shale in triaxial compression tests | |
| Duttine et al. | Anisotropic small strain elastic properties of sands and mixture of sand-clay measured by dynamic and static methods | |
| CN1605862A (en) | Method for nonlinear quantitative non-destructive inspection of bonding interface cohesive force using contact sound | |
| CN114878684A (en) | Steel pipe concrete arch rib compactness detection method based on piezoelectric ceramic ultrasound | |
| CN201993345U (en) | Nondestructive test instrument for concrete structure | |
| Takkabutr | Experimental investigations on small-strain stiffness properties of partially saturated soils via resonant column and bender element testing | |
| Sharifipour et al. | Wave velocities in assemblies of glass beads using bender-extender elements | |
| Verrucci et al. | Cyclic and dynamic behaviour of a soft pyroclastic rock | |
| Sawangsuriya et al. | Dimensionless limits for the collection and interpretation of wave propagation data in soils | |
| CN208520679U (en) | Measure the combined type torsion shear apparatus and system of soil body shear wave velocity | |
| CN214309853U (en) | External excitation test device and test system for measuring shear wave velocity of soil body in large-scale triaxial test | |
| Niu et al. | Laboratory small-strain stiffness measurement using distributed acoustic sensing | |
| Strachan | Alternative test method for ensuring full saturation in triaxial samples |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |