CN207752003U - A kind of full water and soil body local vibration liquefaction test device - Google Patents
A kind of full water and soil body local vibration liquefaction test device Download PDFInfo
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- CN207752003U CN207752003U CN201820146906.8U CN201820146906U CN207752003U CN 207752003 U CN207752003 U CN 207752003U CN 201820146906 U CN201820146906 U CN 201820146906U CN 207752003 U CN207752003 U CN 207752003U
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Abstract
A kind of full water and soil body local vibration liquefaction test device and method, test method for detecting full water solum Degree of Liquefaction, the device includes at least soil body environmental chamber, vibrating device, acceleration transducer, wherein soil body environmental chamber includes opening up babinet, stone layer is disposed in babinet from the bottom up, full water solum, at least one vibrating device is arranged in full water solum, an at least acceleration transducer is arranged in full water solum, vibrating device is electrically connected with vibration frequency control device, acceleration transducer is electrically connected with acceleration signal harvester.The utility model is simple in structure, easy to operate, experiment is accurate.
Description
Technical field
The utility model is related to a kind of civil engineering test detecting equipment, more particularly to a kind of full water liquefaction of soil mass experiment dress
It sets.
Background technology
Liquefaction refers to the phenomenon that loose powder, the fine sand soil of full water destroy under effect of vibration and liquid are presented suddenly, due to
Pore water pressure rises, and effective stress reduces variation phenomenon of the caused sand from solid-state to liquid.Its mechanism is saturation
Loose powder, the fine sand soil body have the tendency that particle is mobile and it is close to become under effect of vibration, bear to turn to from sand skeleton to stress
Water, since the penetration of powder and fine sand soil is bad, pore water pressure can increased dramatically, when pore water pressure arrives greatly total stress value
When, effective stress just drops to 0, and particle suspends in water, and sand body liquefies.In practice of construction, piling, compacting, machine
The local vibrations such as tool vibration can upset the balanced action of the soil body, and the soil body is caused to liquefy.For the research soil body because local vibration is drawn
The liquefaction phenomenon risen, analog mechanical cause the testing equipment of local vibration up for exploitation.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of soil body local vibration simple in structure, easy to operate
Liquefaction test device.
A kind of full water and soil body local vibration liquefaction test device, including soil body environmental chamber, vibrating device, acceleration pass
Sensor, vibration frequency control device, acceleration signal harvester, soil body environmental chamber include opening up babinet, case
It is disposed with stone layer, full water solum from the bottom up in vivo, at least one vibrating device is arranged in full water solum, until
A few acceleration transducer is arranged in full water solum, and vibrating device is electrically connected with vibration frequency control device, and acceleration passes
Sensor is electrically connected with acceleration signal harvester.
Preferably：Vibrating device includes vibrator, the first cannulated threaded bar, and vibrator is mounted on the first cannulated threaded bar
Bottom, vibrator are located in full water solum.
Preferably：Vibrating device further includes the first conducting wire, and first conducting wire one end is connect with vibrator, the other end and vibration frequency
Rate control device connects.
Preferably：Further include the second cannulated threaded bar, the second conducting wire, acceleration transducer are provided in acceleration transducer
Mounted on the bottom of the second cannulated threaded bar, one end of the second conducting wire passes through the second cannulated threaded bar to be filled with acceleration signal acquisition
Set electrical connection.
Preferably：Further include the first top nut, the first bottom nut, the second top nut, the second bottom nut, the soil body
Environmental chamber further includes head cover, and head cover covers on babinet, and slot transversely or longitudinally, the first cannulated threaded are provided on head cover
Bar, the second cannulated threaded bar are located in slot, and the first top nut, the first bottom nut are threadedly coupled with the first cannulated threaded bar,
First top nut is located on the top surface of head cover, and the first bottom nut is located on the bottom surface of head cover, the second top nut, the second bottom
Portion's nut is threadedly coupled with the second cannulated threaded bar, and the second top nut is located on the top surface of head cover, and the second bottom nut is located at
On the bottom surface of head cover.
Preferably：Vibrator further includes pedestal, shell, motor, eccentric wheel, and shell is tightly connected to form a sealing with pedestal
Chamber, motor, eccentric wheel are located inside seal chamber, are fixedly connected with the bottom surface of pedestal at the top of motor, motor transmission shaft and eccentric wheel
It connects, is provided with first through hole on pedestal, the hollow space of the first cannulated threaded bar is aligned with first through hole, the first cannulated threaded
The top surface fixed seal connection of bar and pedestal, one end of the first conducting wire are electrically connected with motor, the other end sequentially pass through first through hole,
First cannulated threaded bar is electrically connected with vibration frequency control device.
Preferably：Vibration frequency control device includes transformer, power lead, frequency controller, and transformer passes through power supply
Conducting wire is connect with frequency controller, and frequency controller includes at least one frequency control unit, and frequency control unit includes successively
The binding post of electrical connection, frequency show that table, slide rheostat, binding post are electrically connected with the other end of the first conducting wire.
Preferably：Further include fixing device, fixing device makes babinet be fixedly connected with head cover.
Preferably：Fixing device is iron clamp.
Advantageous effect：The utility model is simple in structure, easy to operate, experiment is accurate.
Description of the drawings
Fig. 1 is the schematic diagram of experimental rig.
Fig. 2 is the stereoscopic schematic diagram of soil body environmental chamber.
Fig. 3 is the scheme of installation of vibrator and acceleration transducer.
Fig. 4 is head cover schematic diagram.
Fig. 5 is vibrator schematic diagram.
Fig. 6 is the utility model circuit diagram.
Reference numeral title is as follows：1, soil body environmental chamber；2, vibrating device；3, acceleration transducer；4, vibration frequency
Rate control device；5, acceleration signal harvester；6, the first conducting wire；7, transformer；8, power lead；9, binding post；10, frequency
Rate shows table；11, slide rheostat；12, the first top nut；13, the first bottom nut；14, head cover；15, motor；16, partially
Heart wheel；17, shell；18, pedestal；19, screw；20, the first cannulated threaded bar；21, babinet；22, stone layer；23, full water and soil body
Layer；24, the second cannulated threaded bar；25, the second top nut；26, the second bottom nut；27, the second conducting wire.
Specific implementation mode
As shown in figures 1 to 6.A kind of full water and soil body local vibration liquefaction test device includes soil body environmental chamber 1, vibration
Device 2, acceleration transducer 3, vibration frequency control device 4, acceleration signal harvester 5, fixing device.
Soil body environmental chamber 1 includes opening up babinet 21, head cover 14, fixing device, and head cover 14 is covered in babinet 21
On, fixing device makes babinet 1 be fixedly connected with head cover 14, and fixing device can be iron clamp etc..Head cover 14 is steel material tablet.Top
Multiple transverse grooves or cannelure are provided on lid 14.Stone layer 22, full water solum 23, wherein stone layer 22 are provided in babinet 21
Positioned at the bottom of babinet 21, full water solum 23 is arranged in the top of stone layer 22.At least one vibrating device 2 is arranged in full water
In solum 23, for vibrating full water and soil body, make full water liquefaction of soil mass.Vibrating device 2 passes through the first conducting wire 6 and vibration frequency control
Device 4 processed is electrically connected.The vertical frame of four of babinet 21 uses angle steel, and scale is carved on the vertical frame of wherein at least one, with
The thickness of observation stone layer 22 and full water solum 23, four sides is facilitated to use transparent toughened glass to facilitate the full water and soil of observation
The variation of body, bottom surface use steel material bottom surface.
Vibrating device 2 includes vibrator, the first cannulated threaded bar 20, the first conducting wire 6.Vibrator is mounted on the first hollow spiral shell
The bottom of rasp bar 20, vibrator are located in full water solum 23.Vibrator include steel base 18, metal shell 17, motor 15, partially
Heart wheel 16.By high-strength and waterproofing gluing knot on steel base 18, metal shell 17 is tightly connected metal shell 17 with steel base 18
A seal chamber is formed, provides protection for its internal equipment, motor 15, eccentric wheel 16 are located inside seal chamber.The top of motor 15
Portion is fixedly connected by screw 19 with the bottom surface of steel base 18.The transmission shaft of 15 bottom of motor is connected and fixed with eccentric wheel 16, by
In eccentric wheel 16 center of gravity on the outside of the center of 15 transmission shaft of motor, motor 15, which rotates, can cause the vibration of vibrator, vibration frequency
Rate f=p/60 (Hz), p are that Speed unit is（Rev/min）.First through hole, the first cannulated threaded bar 20 are provided on steel base 18
Hollow space be aligned with first through hole, the top surface fixed seal connection of the first cannulated threaded bar 20 and steel base 18.First leads
One end of line 6 is electrically connected with motor 15, and the other end sequentially passes through first through hole, the first cannulated threaded bar 20 and vibration frequency control
Device 4 is electrically connected.First cannulated threaded bar 20 is located in the transverse groove or cannelure of head cover 14.First top nut 12, first
Bottom nut 13 is threadedly coupled with the first cannulated threaded bar 20, and the first top nut 12 is located on the top surface of head cover 14, the first bottom
Portion's nut 13 is located on the bottom surface of head cover 14.First cannulated threaded bar 20 passes through the first top nut 12, the first bottom nut 13
It is fixed on head cover 14.By adjusting the first top nut 12, the first bottom nut 13 can adjust the first cannulated threaded bar 20
It is inserted into the depth for water solum 23 of satisfying, that is to say, that the depth that vibrator is inserted into water solum 23 of satisfying can be adjusted.
An at least acceleration transducer 3 is arranged in full water solum 23, the variation for acquiring full water and soil body vibration.Add
Velocity sensor 3 is standard piezoelectric acceleration transducer.Second cannulated threaded bar 24 is located in laterally or longitudinally slot.Second top
Nut 25, the second bottom nut 26 are threadedly coupled with the second cannulated threaded bar 24, and the second top nut 25 is located at the top surface of head cover
On, the second bottom nut 26 is located on the bottom surface of head cover.Second cannulated threaded bar 24 passes through the second top nut 25, the second bottom
Nut 26 is fixed on head cover 14.Acceleration transducer 3 is fixedly connected with the bottom of the second cannulated threaded bar 24.Acceleration sensing
The second conducting wire 27 is provided in device 3, one end of the second conducting wire 27 passes through the second cannulated threaded bar 24 to be filled with acceleration signal acquisition
Set 5 electrical connections.It can adjust the second cannulated threaded bar 24 by the second top nut 25 of adjusting, the second bottom nut 26 and be inserted into and satisfy
The depth of water solum 23, that is to say, that the depth that acceleration transducer 3 is inserted into water solum 23 of satisfying can be adjusted.
Vibration frequency control device 4 includes transformer 7, power lead 8, frequency controller.Wherein transformer 7 is used to incite somebody to action
220v alternating currents are converted to 50v direct currents, and provide power supply by power lead 8 for frequency controller.Frequency controller includes
At least one frequency control unit.When frequency controller includes more than two frequency control units, frequency control unit it
Between using being connected in parallel.Frequency control unit includes the binding post 9 being sequentially connected electrically, frequency display table 10, slide rheostat 11.
Binding post 9 is electrically connected with the other end of the first conducting wire 6.Slide rheostat 11 is controlling the extent of vibration of vibrator.
Motor 15 is direct current generator in the present embodiment.The relationship of its rotating speed and electric current abides by formula：
P=(U-IR)/K φ wherein U are armature terminal voltage, and I is armature supply, and R is armature circuit all-in resistance, and φ is per pole
Magnetic flux, K are electric motor structure parameter coefficient.And vibration frequency f=p/60 (Hz).According to above-mentioned formula, it can be deduced that vibration frequency
The data of the vibration frequency can be included on frequency display table 10 by the data of rate.It can be changed by stirring slide rheostat
Become vibration frequency, to change the extent of vibration of vibrator.
A kind of method of full water and soil body local vibration liquefaction test is as follows.
The first step：Soil body environmental chamber 1 middle berth, one layer of stone layer 22 repaves one layer of full water solum 23 in stone layer 22
, stone layer 22, full water solum 23 thickness can be determined according to vertical frame high scale.
Second step：The first bottom nut 13 is screwed on the first cannulated threaded bar 20 with vibrator, it is hollow by first
Threaded rod 20 is put into transverse groove or cannelure, and the first bottom nut 13 is made to be located on the bottom surface of head cover 14, hollow first
The first top nut 12 is screwed on threaded rod 20, the first top nut 12 is made to be located on the top surface of head cover 14, passes through the first top
Nut 12, the first bottom nut 13 adjust vibrator to the distance of 14 bottom surface of head cover, that is, adjust vibrator and be inserted into water and soil of satisfying
The depth of body layer 23, and the first cannulated threaded bar 20 is made to be fixedly connected with head cover 14；In second with acceleration transducer 3
The second bottom nut 26 is screwed on empty threaded rod 24, the second cannulated threaded bar 24 is put into transverse groove or cannelure, and makes
Two bottom nuts 26 are located on the bottom surface of head cover 14, and the second top nut 25 is screwed on the second cannulated threaded bar 24, makes second
Top nut 25 is located on the top surface of head cover 14, and acceleration sensing is adjusted by the second top nut 25, the second bottom nut 26
Device 3 that is, adjusts acceleration transducer 3 and is inserted into the depth for water solum 23 of satisfying to the distance of 14 bottom surface of head cover, and makes second
Cannulated threaded bar 24 is fixedly connected with head cover 14.
Third walks：Head cover 14 is aligned with babinet 21, head cover 14 is pressed down, vibrator and acceleration transducer 3 is made to insert
Enter in full water solum 23, until head cover 14 is in contact with babinet 21, its object is to so that vibrator and acceleration transducer 3 is existed
Depth in full water and soil body reaches design requirement.Head cover 14 and babinet 21 are clamped using iron clamp, can also be used other known
Fixing device so that head cover 14 is fixedly connected with babinet 21.
4th step：The first conducting wire 6 is set to be connect with vibration frequency control device 4, the second conducting wire 27 is acquired with acceleration signal
Device 5 is electrically connected.
5th step：Make acceleration signal harvester 5 start to acquire signal, adjusts slide rheostat 11 to resistance maximum
Value connects 4 power supply of vibration frequency control device, after adjusting slide rheostat 11 makes the vibration frequency of vibrator reach design frequency
Start to test.
6th step：After the test, the power supply for disconnecting vibration frequency control device 4 and acceleration signal harvester 5, makes
First conducting wire 6 is disconnected with vibration frequency control device 4, and the second conducting wire 27 is disconnected with acceleration signal harvester 5,
Iron clamp is finally unclamped, head cover 14 is opened and takes out vibrating device 2 and acceleration transducer 3.
Claims (9)
1. a kind of full water and soil body local vibration liquefaction test device, it is characterised in that：Including soil body environmental chamber, vibration dress
It sets, acceleration transducer, vibration frequency control device, acceleration signal harvester, soil body environmental chamber includes opening court
On babinet, stone layer, full water solum are disposed in babinet from the bottom up, at least one vibrating device is arranged in full water
In solum, an at least acceleration transducer is arranged in full water solum, and vibrating device is electrically connected with vibration frequency control device
It connects, acceleration transducer is electrically connected with acceleration signal harvester.
2. experimental rig according to claim 1, it is characterised in that：Vibrating device includes vibrator, the first cannulated threaded
Bar, vibrator are mounted on the bottom of the first cannulated threaded bar, and vibrator is located in full water solum.
3. experimental rig according to claim 2, it is characterised in that：Vibrating device further includes the first conducting wire, the first conducting wire
One end is connect with vibrator, and the other end is connect with vibration frequency control device.
4. experimental rig according to claim 3, it is characterised in that：Further include the second cannulated threaded bar, acceleration sensing
The second conducting wire is provided in device, acceleration transducer is mounted on the bottom of the second cannulated threaded bar, and one end of the second conducting wire passes through
Second cannulated threaded bar is electrically connected with acceleration signal harvester.
5. experimental rig according to claim 4, it is characterised in that：Further include the first top nut, the first bottom nut,
Second top nut, the second bottom nut, soil body environmental chamber further includes head cover, and head cover covers on babinet, is arranged on head cover
There are slot transversely or longitudinally, the first cannulated threaded bar, the second cannulated threaded bar to be located in slot, the first top nut, the first bottom
Portion's nut is threadedly coupled with the first cannulated threaded bar, and the first top nut is located on the top surface of head cover, and the first bottom nut is located at
On the bottom surface of head cover, the second top nut, the second bottom nut are threadedly coupled with the second cannulated threaded bar, the second top nut position
In on the top surface of head cover, the second bottom nut is located on the bottom surface of head cover.
6. experimental rig according to claim 5, it is characterised in that：Vibrator further includes pedestal, shell, motor, bias
Wheel, shell are tightly connected to form a seal chamber with pedestal, and motor, eccentric wheel are located inside seal chamber, motor top and pedestal
Bottom surface is fixedly connected, and motor transmission shaft is connect with eccentric wheel, is provided with first through hole on pedestal, the first cannulated threaded bar it is hollow
Part is aligned with first through hole, the top surface fixed seal connection of the first cannulated threaded bar and pedestal, one end and the electricity of the first conducting wire
Mechatronics, the other end sequentially passes through first through hole, the first cannulated threaded bar is electrically connected with vibration frequency control device.
7. experimental rig according to claim 6, it is characterised in that：Vibration frequency control device includes transformer, power supply
Conducting wire, frequency controller, transformer are connect by power lead with frequency controller, and frequency controller includes at least one frequency
Control unit, frequency control unit include the binding post being sequentially connected electrically, frequency display table, slide rheostat, binding post and
The other end of one conducting wire is electrically connected.
8. experimental rig according to claim 7, it is characterised in that：Further include fixing device, fixing device make babinet with
Head cover is fixedly connected.
9. experimental rig according to claim 8, it is characterised in that：Fixing device is iron clamp.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820146906.8U CN207752003U (en) | 2018-01-29 | 2018-01-29 | A kind of full water and soil body local vibration liquefaction test device |
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| CN201820146906.8U CN207752003U (en) | 2018-01-29 | 2018-01-29 | A kind of full water and soil body local vibration liquefaction test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107190A (en) * | 2018-01-29 | 2018-06-01 | 铜陵学院 | A kind of full water and soil body local vibration liquefaction test apparatus and method |
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- 2018-01-29 CN CN201820146906.8U patent/CN207752003U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107190A (en) * | 2018-01-29 | 2018-06-01 | 铜陵学院 | A kind of full water and soil body local vibration liquefaction test apparatus and method |
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