CN108362611A - Rheological behavior in-situ measurement device after a kind of liquefaction of bottom sediment - Google Patents
Rheological behavior in-situ measurement device after a kind of liquefaction of bottom sediment Download PDFInfo
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- CN108362611A CN108362611A CN201810283575.7A CN201810283575A CN108362611A CN 108362611 A CN108362611 A CN 108362611A CN 201810283575 A CN201810283575 A CN 201810283575A CN 108362611 A CN108362611 A CN 108362611A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
- G01N11/14—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by using rotary bodies, e.g. vane
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Abstract
Rheological behavior in-situ measurement device after liquefying the invention discloses a kind of bottom sediment, including cross wrench, connecting rod, motor, torque sensor, angular displacement sensor and control module；The cross wrench is for being inserted into bottom sediment；The bottom of the connecting rod connects the cross wrench；The motor drives the cross wrench rotation for driving the connecting rod to rotate；One end of the torque sensor connects the shaft of the motor by shaft coupling, and the other end connects the top of the connecting rod, the torque for detecting connecting rod；What the angular displacement sensor was used to detect cross wrench turns over angle；The control module receives the detection signal of the torque sensor and angular displacement sensor output, and generates measurement result.Cross wrench can be directly inserted into the soil body to be measured by the measuring device of the present invention, and in situ measurement is carried out for the liquefaction rheological behavior to the soil body to be measured, easy to operate, be suitble to onsite application, will not be destroyed state of soil.
Description
Technical field
The invention belongs to Ground crack detection technique fields, specifically, being to be related to one kind for detecting bottom sediment
Liquefaction after rheological behavior in-situ measurement device.
Background technology
Rheology characteristics of soil refers to a series of property of the similar fluids shown after liquefaction of soil mass.In-situ test is in rock
The test that on native original location or substantially rock and soil properties are carried out under state and stress condition in situ.Ordinary circumstance
Under, due to the presence of effective stress, the pore water pressure of the soil body is less than total stress.However, under the action of wave load, sea bed
Pore water pressure in soil can be increased constantly, when pore water pressure is increased to it is equal with total stress when, have effect in seabed soil
Power is equal to zero, and soil skeleton loses active force, and in water, at this moment soil becomes the same substance of imaging fluid, funeral to soil particle " suspension "
Shearing strength and bearing capacity are lost, here it is the liquefaction phenomenons of seabed soil.Seabed soil liquefaction unstability, to marine environment and ocean work
Cheng Douhui brings considerable damage, or even causes a series of geological disasters such as submarine landslide, carrys out grave danger to the life zone of the mankind.
Domestic and foreign scholars are analyzed and researched by experimental study, analysis research and numerical value at present, it is found that liquefying soil is a kind of " shear thinning "
Non-newtonian fluid：I.e. with the increase of shear rate, apparent viscosity continuously decreases.So analysis liquefaction scene seabed soil in situ
The unstable failure situation of body understands scene seabed soil shear rheology property in situ, to ensureing offshore engineering structure under extreme sea condition
The safe and pre- Geological disaster prevention of object is all significant.
In the analysis of the liquefaction earth rheological equationm of state, apparent viscosity and flow curve are all important parameter.Apparent viscosity
It is the physical quantity for the interior friction for indicating fluid, is the resistance that a layer fluid performs relative motion another layer fluid, is defined as cutting and answer
The ratio of power and shear rate.Shear rate is due to a kind of velocity gradient that the laminar velocity of fluid is different and is formed, flowing
The movement of slower liquid layer retardance flows faster liquid layer, is defined as the ratio of shearing strain and time.Flow curve is to indicate fluid
Shear rate and shear stress relation curve.
Environments such as subsea is ever-changing, and there are many unknown influence factors beyond present people cognition, especially sea-bottom deposit
Environment residing for object is increasingly complex.Therefore, to study liquefaction bottom sediment rheological behavior, just must to bottom sediment into
Row scene in situ detection, could solve engineering problem, pre- Geological disaster prevention.It is sticked however, being currently used for detection fluid meter and seeing
The measuring device of degree is only limitted to laboratory applications environment, such as rotational viscometer, capillary viscometer, falling ball viscometer etc..Its
In, the principle of rotational viscometer is that fluid is made to generate shear flow between slit, measures the torque in flow process to calculate stream
The apparent viscosity of body.Capillary viscometer is to make fluid slowly flow across the capillary glass tube that one has been demarcated under the effect of gravity to stick
Degree meter flows through the time of viscosmeter to reflect the viscosity of fluid by measurement fluid.The principle of falling ball viscometer is rigid by one
Property ball be put into the transparent graduated cylinder for filling with fluid, rigid ball with gravity fall, measure rigid ball in a fluid at the uniform velocity by when
Speed calculates the apparent viscosity of fluid.In addition, in terms of model investigation rheology characteristics of soil, domestic and foreign scholars have also been made
A series of exploration sex works, for example, application No. is 201110321240.8 Chinese invention patents to disclose one kind for testing
The Intelligent soil engineering shear rheometer of room；Application No. is 201610081275.1 Chinese invention patent applications to disclose a kind of simulation
The large deformation cross wrench shear rheology pilot system of Debris flow initiation, these patent application technologies are all for studying soil body stream
Become characteristic, but may be only available for laboratory environment.
Why above-mentioned rheology characteristics of soil measurement method is not suitable for the rheological behavior of in situ measurement bottom sediment
The reason is that：
(1) structure of existing apparatus itself is not suitable for onsite application, and the complicated for operation and used time is longer；
(2) existing apparatus must first extract soil sample before measuring, and then soil sample is placed in a specific container.This
The sample meeting serious disturbance soil body, destroys the state of original bottom sediment；
(3) existing apparatus can only be directed to single homogeneous soil, and practical bottom sediment liquefaction process is sufficiently complex, may
There is lamination.Therefore, existing apparatus is unable to measure out the rheological behavior of different depth bottom sediment.
Invention content
Rheological behavior in situ measurement fills after liquefying the purpose of the present invention is to provide a kind of bottom sediment of brand new
It sets.The device is suitble to onsite application and easy to operate, and the rheology that can be measured after the liquefaction of different depth bottom sediment is special
Property.
In order to solve the above technical problems, the present invention is achieved by the following scheme：
Rheological behavior in-situ measurement device after a kind of liquefaction of bottom sediment, includes for being inserted into bottom sediment
Cross wrench, connecting rod, motor, torque sensor, angular displacement sensor and control module；The bottom connection described ten of the connecting rod
Letter stencil head；The motor drives the cross wrench rotation for driving the connecting rod to rotate；The torque sensor
One end connects the shaft of the motor by shaft coupling, and the other end connects the top of the connecting rod, the torque for detecting connecting rod；
What the angular displacement sensor was used to detect cross wrench turns over angle；The control module receives the torsion of torque sensor output
Square signal and the angular displacement signal of angular displacement sensor output, and then converse torque value and turn over angle, utilize formulaCalculate shear stress τf, utilize formulaShear rate S is calculated, and then according to formulaCalculate the apparent viscosity η of bottom sedimenta；Wherein, D is the diameter of cross wrench；H is the height of cross wrench；
Mmax, A, T be respectively the cross wrench after being inserted into a certain depth of bottom sediment, when the depth location rotates
Torque value turns over angle and corresponding rotation duration.
Further, cabinet is additionally provided in the measuring device, the control module is mounted in the cabinet, institute
The outside that motor, shaft coupling, torque sensor, angular displacement sensor, connecting rod, cross wrench are located at the cabinet is stated, described
Supporting rack is installed on the external shell of torque sensor, support frame as described above is mounted on cabinet, to by motor, shaft coupling,
Torque sensor, angular displacement sensor, connecting rod, cross wrench and cabinet fit together.
It is inserted into bottom sediment to control cross wrench, and deep to insertion of the cross wrench in bottom sediment
Degree is accurately measured, and following two preferred embodiments may be used in the present invention：
First, it is extension type connecting rod to design the connecting rod, manually or automatically controls the connecting rod and stretch, described in driving
Cross wrench is inserted into bottom sediment or is withdrawn from bottom sediment；In the length direction of the connecting rod upper edge connecting rod
Graduation mark is set, determines that the cross wrench is inserted into the depth of bottom sediment by the graduation mark；
Second, installing elevating mechanism on the cabinet, support frame as described above is mounted on the elevating mechanism, institute is passed through
It states elevating mechanism driving supporting rack to move up and down, and then the cross wrench is driven to be inserted into bottom sediment or from seabed
It is withdrawn in deposit.The elevating mechanism is controlled using the control module to run, and then can be according to the operation of elevating mechanism
State determines that the cross wrench is inserted into the depth of bottom sediment.
For the ease of the installation of angular displacement sensor, the motor preferably uses dual-axle motor, and one of shaft is led to
It crosses shaft coupling and connects the torque sensor, another shaft connects the angular displacement sensor by another shaft coupling, described
The shaft synchronous rotary of connecting rod and the motor.
In order to realize that the accurate adjusting to motor speed, the present invention are additionally provided with rotational speed regulation rotation in the measuring device
Button and speed probe, the rotational speed regulation knob is mounted on the cabinet, and connects the control module, the control mould
Root tuber adjusts the rotating speed of the motor according to the setting speed inputted by rotational speed regulation knob；The speed probe is mounted on institute
State on motor, the rotating speed for detecting motor, and generate tach signal and be sent to the control module, the control module according to
The actual speed of the tach signal regulation motor received reaches the setting speed, to realize the accurate control to motor speed
System.
Preferably, it is provided with data-interface on the cabinet, connects the control module, the control module passes through institute
State data-interface and external equipment interaction data.
Further, display screen is also equipped on the cabinet, the display screen connects the control module, for showing
Show the torque value Mmax, turn over the data such as angle A and the result of calculation of corresponding duration T and control module, in order to scene
Researcher consults the working condition of measuring device and the liquefaction rheological behavior of the bottom sediment detected.
In order to enable bottom sediment of the measuring device of the present invention to the depth of water more than 5 meters to carry out situ measurement,
The present invention is additionally provided with sealed compartment and communication module in the measuring device；At least one of the cross wrench and connecting rod
Divide and stretch out the sealed compartment, other components of measuring device are built in the sealed compartment；The communication module is built in described
In sealed compartment, and connect the control module, the control module by the communication module in a wired mode or wireless mode
It is communicated with the host computer of distal end, interaction data.
Preferably, digital underwater altimeter is installed on the sealed compartment, for detecting the measuring device to seabed
The distance of deposit, and generate detection signal and be sent to the control module, the measuring device that the control module will detect
Host computer is sent to by communication module at a distance from bottom sediment, to judge whether measuring device drops to bottom sediment
On, and then determine when that starting measuring device is detected the fluid stream characteristic of bottom sediment.
Compared with prior art, the advantages and positive effects of the present invention are：The measuring device of the present invention can be by four-bladed vane
Head is directly inserted into the soil body to be measured, carries out in situ measurement to the rheological behavior of the soil body to be measured, easy to operate, suitable scene makes
With state of soil will not be destroyed.The present invention measures deposit strain using angular displacement sensor, and onsite application is stablized relatively.It will
It is applied in marine monitoring field, not only can be under the premise of not changing the original environment of bottom sediment and state, quickly
Easily measure the rheological behavior of bottom sediment, but also the depth that can be inserted into according to cross wrench in bottom sediment
Degree, measures the rheological behavior of bottom sediment after different depth liquefaction, and then obtains the vertical of bottom sediment rheological behavior
Distribution obtains the parameter for being more in line with engineer application.
After the detailed description of embodiment of the present invention is read in conjunction with the figure, the other features and advantages of the invention will become more
Add clear.
Description of the drawings
Fig. 1 is that a kind of structure of embodiment of bottom sediment liquefaction rheology characteristic measuring device proposed by the invention is shown
It is intended to；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is the structure of another embodiment of bottom sediment liquefaction rheology characteristic measuring device proposed by the invention
Schematic diagram；
Fig. 4 is that a kind of circuit of embodiment of bottom sediment liquefaction rheology characteristic measuring device proposed by the invention is former
Manage block diagram.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2, Figure 4 shows, rheological behavior in-situ measurement device is main after the bottom sediment liquefaction of the present embodiment
It is made of the part such as cabinet 1, motor 2, connecting rod 5, cross wrench 6, angular displacement sensor 16, torque sensor 4, control module.
Wherein, control module can be arranged in the inside of cabinet 1, motor 2, connecting rod 5, cross wrench 6, angular displacement sensor 16, torque
Sensor 4 can be arranged in the outside of cabinet 1.Shaft coupling 3 is installed in the shaft of motor 2, torque is connected by shaft coupling 3
One end of sensor 4 connects connecting rod 5 in the other end of torque sensor 4, can specifically connect the top of connecting rod 5, and then realize electricity
Machine 2 drives the rotation of connecting rod 5.Cross wrench 6 is connected to the bottom end of connecting rod 5, motor 2 is rotated by drive link 5, in turn
Cross wrench 6 is driven to rotate.In the present embodiment, the cross wrench 6 is used to be inserted into the soil body to be measured, such as is inserted into
In bottom sediment, after cross wrench 6 is inserted into a certain set depth h of bottom sediment, control cross wrench 6 is in the depth
The rotation of position original place is spent, and detects the torque of connecting rod 5 using torque sensor 4, and generates detection signal (torque signal) and sends
Control module to cabinet 1, to converse the torque value that cross wrench 6 destroys seabed soil.Due to passing through torque sensing
The torque value that device 4 detects can reflect shear stress of the cross wrench 6 suffered by bottom sediment, and therefore, the present embodiment is set
Following calculation formula is counted, the shear stress τ of bottom sediment is calculatedf：
In formula, D is the diameter of cross wrench 6, is equivalent to cross wrench 6 and is inserted into brill formed in bottom sediment
The diameter in hole；H is the height of cross wrench 6；MmaxIt is cross wrench 6 after being inserted into a certain depth h of bottom sediment,
Torque value when depth location h rotations.In measurement process, after cross wrench 6 must be fully inserted into bottom sediment,
Start the liquefaction rheological behavior to bottom sediment again to measure.
In the present embodiment, the installation in order to facilitate angular displacement sensor 16 is fixed, and the present embodiment preferably uses twin shaft electricity
2 drive link 5 of machine rotates synchronously, as shown in Figure 2.One of dual-axle motor 2 shaft 21 is connected into torque by shaft coupling 3
Sensor 4, another shaft 22 connect angular displacement sensor 16, specifically using another shaft coupling by the another of dual-axle motor 2
A shaft 22 links together with angular displacement sensor 16, and the angle that turns over by detecting machine shaft knows cross wrench 6
Turn over angle.
Turning over angle and can reflect strain due to cross wrench 6, according to the calculation formula of shear rate：Shear rate=
Therefore strain/time can control motor 2 by control module and rotate, and record the rotation duration of motor 2；Then, it utilizes
Following formula, you can calculate shear rate S：
Wherein, A be cross wrench 6 be inserted into liquefaction after bottom sediment a certain depth h after, in the depth location
Angle is turned over when h is rotated；T is the corresponding rotation duration when depth location h is rotated of cross wrench 6, and shear rate S is to turn
Over-angle A and the differential for turning over duration T.
Since apparent viscosity is defined as shear stress and the ratio of shear rate, it is consequently possible to calculate going out bottom sediment
Apparent viscosity ηa：
According to calculated shear stress τfAnd shear rate S can draw out the flow curve of bottom sediment.As a result,
Just two important parameters of the bottom sediment in the Research on rheology character that liquefies have been obtained：Apparent viscosity and flow curve.
In order to control insertion depth h of the cross wrench 6 in bottom sediment, the present embodiment proposes two kinds of design schemes：
One is the connecting rod 5 is designed to extension type connecting rod, manually or automatically control mode control may be used
The connecting rod 5 is extended or is retracted, and then cross wrench 6 is driven to be inserted into bottom sediment or received from bottom sediment
It returns.Since the flexible technology of control extension type connecting rod 5 has been mature technology at present, the present embodiment does not do explain in detail herein
It states.Graduation mark is set on connecting rod 5, the insertion depth h of cross wrench 6 is can be obtained by observing graduation mark.
The second is supporting rack 14 is installed on motor 2 or torque sensor 4, as shown in Fig. 2, on the babinet of cabinet 1
Install elevating mechanism 13, by supporting rack 14 be mounted on the elevating mechanism 13 on, on the one hand may be implemented motor 2, shaft coupling 3,
Torque sensor 4, connecting rod 5 and cross wrench 6 are plug-in on cabinet 1；On the other hand the lifting is controlled by control module
Mechanism 13 is run, and to drive supporting rack 14 to move up and down, and then is controlled cross wrench 6 and is inserted into bottom sediment or from sea
It is withdrawn in bottom sediment.Diversified forms, such as rack and pinion engagement structure etc. may be used in the elevating mechanism, and control module is logical
Cross the operating status of control elevating mechanism, you can know the insertion depth h of cross wrench 6.
Change insertion depth h of the cross wrench 6 in bottom sediment, you can measure bottom sediment different depth
Liquefy rheological behavior, and then obtains the vertical distribution of bottom sediment rheological behavior, obtains the parameter for being more in line with engineer application.
In the present embodiment, the cross wrench 6 can be formed directly into the bottom end of connecting rod 5, i.e., with the one of connecting rod 5 at
Type can also be fixedly connected on the bottom end of the connecting rod 5 by the way of connection.
The present embodiment can also further install display screen 12 on cabinet 1, connect the control module, by control module
The torque value M conversedmaxWith turn over angle A and corresponding rotation duration T and calculated apparent viscosity ηa, generate stream
Moving curve shows that on the display 12 personnel for deliberation observe.
In order to change the rotating speed of motor 2, rotational speed regulation knob 10 can be installed on cabinet 1, as shown in Figure 1, even
Connect the control module.The setting speed of motor, Jin Ertong can be arranged by operating rotational speed regulation knob 10 in researcher
Control module is crossed the rotating speed of motor 2 is adjusted.In order to enable the actual speed of motor 2 to stablize in setting speed, this
Embodiment preferably installs speed probe on the motor 2, the actual speed for detecting motor 2, and generates detection signal
(tach signal) is sent to the control module inside cabinet 1, to converse the tachometer value of motor 2.Control module is according to conversing
Tachometer value regulation motor 2 rotating speed, make the tachometer value be equal to setting speed, then realize the accurate control to motor speed
System.
Handle 11 can also be further arranged at the top of the cabinet 1 in the present embodiment, in order to which researcher carries.
Data-interface 7 can also be set on the babinet of cabinet 1, such as USB interface etc. connects the control mould in conjunction with shown in Fig. 1, Fig. 4
Block realizes that measuring device is set with outside in order to which control module acquisition and calculated measurement data are sent to external equipment
Data interaction between standby.
In the measuring device using the present embodiment to the sea-bottom deposit of the neritic area of 5 meters of seabeach intertidal zone or water depth deficiency
After thing liquid when rheological behavior in situ measurement, cabinet 1 can be placed on the carrying platform on sea, cross wrench 6 is extend into
In seawater, and supporting rack 14 is driven to move down by controlling the elongation of extension type connecting rod 5 or starting elevating mechanism 13, thus by ten
Letter stencil head 6 is inserted into bottom sediment, and reaches required depth h.Cross wrench 6 is controlled in sea-bottom deposit by motor 2
Original place rotates in object, and live in situ detection is carried out to the liquefaction rheological behavior of bottom sediment.
Measuring device shown in Fig. 2 because by cabinet 1 height or 5 collapsing length of connecting rod limited, suitable for application in
The depth of water is more than 5 meters of marine site.In order to carry out in situ measurement to the bottom sediment of blue water, the present embodiment can will scheme
Measuring device shown in 2 is built in a sealed compartment 15, as shown in figure 3, only at least part of cross wrench 6 and connecting rod 5
Sealed compartment 15 is exposed to, so that cross wrench 6 is inserted into bottom sediment.Meanwhile the setting communication mould in cabinet 1
Block, as shown in figure 4, connecting the control module.The control module by communication module with it is on deck or long-range upper
Machine communicates in wired or wireless manner, control module acquisition and calculated measurement data is uploaded to host computer, for grinding
Study carefully personnel's observation.Meanwhile researcher can will need the bottom sediment depth detected to be sent to control mould by host computer
Block, to control the insertion depth h of cross wrench 6.
After launching measuring device shown in Fig. 3 to blue water, in order to accurately learn whether measuring device lands
On sea bed, the present embodiment is also further fitted with digital underwater altimeter on the sealed compartment 15, for examining in real time
Survey the measuring device to bottom sediment distance.Before launching measuring device, start measuring device operation, by measuring device
Marine site to be measured is launched, digital underwater altimeter real-time monitoring device generates detection signal and be sent at a distance from deposit
Control module.The distance detected is uploaded to host computer by control module in real time by communication module, judges to survey for researcher
The down position of device is measured, and is observing measuring device when landing on sea bed, transmitting order to lower levels is risen to control module with controlling
Descending mechanism 13 drives cross wrench 6 to decline, and is inserted into bottom sediment, and reaches required insertion depth, and then to seabed
The liquefaction rheological behavior of deposit carries out situ measurement.
As shown in figure 4, accumulator, charging circuit and power supply conversion can also be further arranged in the present embodiment in cabinet 1
Charging socket 9 and power switch 8 can be arranged, in conjunction with shown in Fig. 1 in circuit on the babinet of cabinet 1.Charging circuit is connected to
Between charging socket 9 and accumulator, in the remaining capacity deficiency of accumulator, can on charging socket 9 external charger, profit
To charge the battery with external power supply, it is each power load power supply in measuring device using the electricity of accumulators store.It will be electric
Source switch 8 is connected between accumulator and power-switching circuit, when needing to start measuring device operation, is closed power switch 8,
It is powered for power-switching circuit using accumulator, the voltage that accumulator exports is converted by each electricity consumption by power-switching circuit and is born
The operating voltage needed for (such as control module, camera, display screen 12, motor 2 etc.) is carried, is powered for each power load.
The measuring device of the present embodiment is simple in structure, easy to operate, both can be applicable to laboratory environment, to bottom sediment
Fluid stream characteristic carry out analog detection, be also applicable in site environment, realize the original to bottom sediment in marine site to be measured
Position measures.
Certainly, the above is only a kind of preferred embodiment of the present invention, it is noted that for the general of the art
For logical technical staff, various improvements and modifications may be made without departing from the principle of the present invention, these improve and
Retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. rheological behavior in-situ measurement device after a kind of bottom sediment liquefaction, which is characterized in that including：
Cross wrench is used to be inserted into the bottom sediment after liquefaction；
Connecting rod, bottom connect the cross wrench；
Motor is used to drive the connecting rod to rotate, and then drives the cross wrench rotation；
Torque sensor, one end connect the shaft of the motor by shaft coupling, and the other end connects the top of the connecting rod, use
In the torque of detection connecting rod；
Angular displacement sensor, be used to detect cross wrench turns over angle；
Control module receives the torque signal of torque sensor output and the angular displacement signal of angular displacement sensor output,
And then converse torque value and turn over angle, utilize formulaCalculate shear stress τf, utilize formulaShear rate S is calculated, and then according to formulaCalculate the apparent viscosity η of bottom sedimenta；Wherein, D
For the diameter of cross wrench；H is the height of cross wrench；Mmax, A, T be respectively that the cross wrench is being inserted into sea-bottom deposit
After a certain depth of object, torque value when the depth location rotates turns over angle and corresponding rotation duration.
2. rheological behavior in-situ measurement device after bottom sediment liquefaction according to claim 1, which is characterized in that also wrap
Include cabinet, the control module is mounted in the cabinet, the motor, shaft coupling, torque sensor, angular displacement sensor,
Connecting rod, cross wrench are located at the outside of the cabinet, and support is equipped on the external shell of the torque sensor or motor
Frame, support frame as described above are mounted on the cabinet.
3. rheological behavior in-situ measurement device after bottom sediment liquefaction according to claim 2, which is characterized in that described
Connecting rod is extension type connecting rod, and the length direction of the connecting rod upper edge connecting rod is provided with graduation mark, true by the graduation mark
The fixed cross wrench is inserted into the depth of bottom sediment.
4. rheological behavior in-situ measurement device after bottom sediment liquefaction according to claim 2, which is characterized in that in institute
It states and elevating mechanism is installed on cabinet, support frame as described above is mounted on the elevating mechanism, and branch is driven by the elevating mechanism
Support moves up and down, and then the cross wrench is driven to be inserted into bottom sediment or withdrawn from bottom sediment.
5. rheological behavior in-situ measurement device after bottom sediment liquefaction according to claim 4, which is characterized in that described
Control module controls the elevating mechanism operation, determines that the cross wrench is inserted into seabed according to the operating status of elevating mechanism
The depth of deposit.
6. rheological behavior in-situ measurement device after bottom sediment liquefaction according to claim 1, which is characterized in that described
Motor is dual-axle motor, and one of shaft connects the torque sensor by the shaft coupling, another shaft passes through another
One shaft coupling connects the angular displacement sensor, the shaft synchronous rotary of the connecting rod and the motor.
7. the rheological behavior in-situ measurement device after bottom sediment liquefaction according to claim 2, which is characterized in that also
Including：
Rotational speed regulation knob is mounted on the cabinet, and connects the control module, and the control module is according to by turning
The setting speed of fast adjusting knob input adjusts the rotating speed of the motor；
Speed probe is mounted on the motor, the rotating speed for detecting motor, and generate tach signal be sent to it is described
Control module, the control module reach the setting speed according to the actual speed of the tach signal regulation motor received.
8. rheological behavior in-situ measurement device after bottom sediment liquefaction according to claim 2, which is characterized in that also wrap
It includes：
Data-interface is arranged on the cabinet, connects the control module, the control module passes through the data-interface
With external equipment interaction data；
Display screen is mounted on the cabinet, and connects the control module, for showing the torque value Mmax, turn over
The result of calculation of angle A, rotation duration T and control module.
9. rheological behavior in-situ measurement device after bottom sediment liquefaction according to any one of claim 1 to 8, special
Sign is, further includes：
At least part of sealed compartment, the cross wrench and connecting rod stretches out the sealed compartment, other components of measuring device
It is built in the sealed compartment；
Communication module is built in the sealed compartment, and connects the control module, and the control module passes through the communication
Module is communicated with the host computer of distal end in a wired mode or wireless mode, interaction data.
10. rheological behavior in-situ measurement device after bottom sediment liquefaction according to claim 9, which is characterized in that
Digital underwater altimeter is installed on the sealed compartment, the distance for detecting the measuring device to bottom sediment, and it is raw
It is sent to the control module at detection signal, and then host computer is uploaded to by the communication module, to determine measuring device
Whether drop on bottom sediment.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111238868A (en) * | 2020-03-11 | 2020-06-05 | 山东省环科院环境科技有限公司 | Intelligent soil sampler |
| CN111257135A (en) * | 2020-01-21 | 2020-06-09 | 同济大学 | Test device and method for measuring shear rheological property of liquefiable soil in centrifugal field |
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