CN110512586A - A kind of ejection type T-type flows perforation device entirely - Google Patents
A kind of ejection type T-type flows perforation device entirely Download PDFInfo
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- CN110512586A CN110512586A CN201910763580.2A CN201910763580A CN110512586A CN 110512586 A CN110512586 A CN 110512586A CN 201910763580 A CN201910763580 A CN 201910763580A CN 110512586 A CN110512586 A CN 110512586A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Soil Sciences (AREA)
- Analytical Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (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)
- Geophysics And Detection Of Objects (AREA)
Abstract
The present invention is that a kind of ejection type T-type flows perforation device entirely, the device consists of three parts: the catapult-launching gear (1) of first part is located at top, the guided missile formula empennage (2) of second part is located at middle part, and the T-type of Part III flows probe (3) entirely and is located at lower part.The initial kinetic energy that T-type flows penetrometer entirely is provided by catapult-launching gear, the depth of penetration of penetrometer can be effectively improved, the guided missile formula empennages of page four can be improved the stability and injection point precision of penetrometer, increase acceleration transducer, force snesor, inclination sensor, sensor for pore water pressure can be further improved T-type and flow penetrometer underwater in-situ measuring accuracy entirely.The perforation device is tested for underwater ultra-soft soil strength characteristics, there is quick, economic, easy to operate, high accuracy for examination, is the special strong in-situ test tool of the underwater ultra-soft soil intensity of evaluation.
Description
Technical field
The present invention relates to a kind of ejection type T-types to flow perforation device entirely, is strong for evaluating underwater ultra-soft soil intensity extra-heavy
In-situ test tool, belong to rock-soil engineering in-situ testing field.
Background technique
Coastal and lacustrine deposit area is widely present a large amount of ultra-soft soil, and this ultra-soft soil water content is high (being greater than 100%),
In liquid-plastic state, have the characteristics that high-compressibility, extremely low intensity and high sensitivity, and have structural, such ultra-soft soil is almost
It can not be sampled and laboratory test, existing prospecting measuring technology are difficult to evaluate its intensity and deformation behaviour, original position can only be passed through
Test method.Including vane shear test, the test of CPTU static sounding, ball-type and T-type flow full static sounding test and from
It is tested by falling body type injection.And weak soil intensive action inconvenience is tested in vane shear test under water and test value is discontinuous；By
Under high confining pressure stress condition under water, measurement of traditional CPTU instrument probe load cell in penetration process for ultra-soft soil
Accuracy greatly reduces；Simultaneously can not correctly quantitative description cladding earth pressure effect, wanted so being unable to satisfy engineering design
It asks.Randolph etc. is proposed based on full-flow theory a kind of novel complete by the way of increasing penetrometer projected area
Cone penetrometer (ball-type and T-type flow static sounding entirely) is flowed to solve the above problems.When full stream cone penetrometer is by passing through underwater ultra-soft soil,
The soil flow for being similar to viscous fluid state is generated around probe around detecting head surface, is obtained by the friction of detecting head surface and soil flow
Obtain the undrained shear strength of ultra-soft soil.But static sounding requires loading device to measure, and scene is surveyed on the water
The exploration vessel of profession is needed during surveying, it is costly.And free fall type injection test is by freely falling body mode power
The penetrometer that injection is measured under water, without other loading devices.Mainly there is free fall type taper injection at present
Two kinds of forms of instrument and formula spherical shape penetrometer, but current free fall type penetrometer depth of penetration is limited, and cannot be fine
The stress of simulation bottom pipeline.
Summary of the invention
Technical problem: the object of the present invention is to provide a kind of ejection type T-types to flow perforation device entirely, which passes through ejection dress
Set and T-type is provided flows the initial kinetic energy of penetrometer entirely, carry out dynamic driving, can simulation submerged pipe line very well stress,
And the depth of penetration of penetrometer can be effectively improved, the guided missile formula empennages of page four can be improved the stability and injection point of penetrometer
Precision increases acceleration transducer, sensor for pore water pressure can be further improved T-type and flow penetrometer underwater in-situ measuring accuracy entirely.
The perforation device is tested for underwater ultra-soft soil strength characteristics, is had quick, economic, easy to operate, high accuracy for examination, is to comment
The strong in-situ test tool of the underwater ultra-soft soil strength characteristics of valence.
Technical solution: to solve the shortcomings of the prior art, the present invention provides a kind of ejection type T-types to flow injection dress entirely
It sets, which consists of three parts:
First part is catapult-launching gear, including launching cradle, and elastic force ring launches pedestal, launches slip pipe and elastic sensor；Its
In, elastic force ring is located at the top of ejection pedestal, launches slip pipe and elastic sensor is located on the central axes of catapult-launching gear；
Second part is the guided missile formula empennage for stablizing penetrometer injection direction, and tail portion is four page empennages, and inside is equipped with same
Shaft cable transmits signal and data, and coaxial cable connects internal Digital To Analog converter, and lower bottom part is nipple；
Part III is that T-type flows probe entirely, and the connecting rod including connecting guided missile formula empennage, connecting rod bottom is furnished with inclination angle
Sensor, acceleration transducer and sensor for pore water pressure；
The catapult-launching gear of first part is located at top, and the guided missile formula empennage of second part is located at middle part, the T-type of Part III
Full stream probe is located at lower part.
Catapult-launching gear configures the elastic force ring of different number according to initial kinetic energy demand.
The elastic force ring is connect with ejection pedestal using hook and loop type.
The tail portion of the ejection slip pipe and guided missile formula empennage is using the embedded connection that can be popped up.
The tail portion of the guided missile formula empennage uses four page empennages, and single empennage is right angled triangle.
The second part guided missile formula empennage is connect with nipple with the connecting rod that Part III T-type flows probe entirely.
The T-type flows probe, long 100-500mm, diameter 10-80mm, projected area 10-400cm entirely2。
The speed v that ejection type T-type flows perforation device entirely can be integrated to obtain by the acceleration a that acceleration transducer measures:
Depth of penetration z can be integrated to obtain by speed v:
Existing research shows to flow injection probe entirely due to T-type in acceleration (or deceleration) motion process, will drive periphery soil
Body accelerates (or slow down) movement, it is therefore desirable to the effect for considering additional mass m*, by following formula (calculated:
m*=Cmmsoil (3)
Wherein, CmFor mass coefficient；msoilFlow injection probe entirely for T-type and arrange the quality of the soil body, according to formula (4) into
Row calculates
msoil=VT-barρsoil (4)
Wherein, VT-barFlow the volume that injection probe arranges the soil body, ρ entirely for T-typesoilFor the density of the soil body.
So the effective mass m that T-type flows injection probe entirely can be calculated by following formula:
M=m*+msoil (5)
Penetration resistance qt,,dThe effective mass m that injection probe can be flowed entirely according to T-type is obtained multiplied by the acceleration a of measurement:
Wherein, v is the speed that ejection type T-type flows perforation device entirely；Z is depth of penetration；WbInjection is flowed entirely for ejection type T-type
The buoyant weight of device in water；M is the effective mass that T-type flows injection probe entirely；FDFor towrope resistance (because soil body inertia generates)；Fb
It is equal to the effective weight for arranging soil for buoyancy；Rf,ipThe strain rate coefficient of penetration resistance；Nk,T-barFlow injection probe entirely for T-type
Bearing capacity coefficient；As is that ejection type T-type flows the projected area that perforation device T-type flows probe entirely entirely.
The calculation method of soil body towrope resistance is identical as the calculation method of fluid drag resistance.
Wherein, ρsFor soil body saturated density；CdFor drag coefficient.
The strain rate coefficients R of penetration resistancef,tip, it is calculated by following formula:
Wherein, γ & be strain rate,It is strain rate parameter for the reference strain rate of undrained shear strength, β.
The undrained shear strength s of the soil bodyuIt needs to deduct towrope resistance and soil strength is generated because of strain rate effect
Reduction, can be calculated as follows:
Wherein, qc,dFor the penetration resistance of measurement；u2To measure or estimate the pore pressure at cone shoulder；αcone: it is unequal
The area ratio；σv0For overlying stress；qD(it is equal to F for towrope resistanceD/As)；RF, tipFor the strain rate coefficient of penetration resistance；
Nk,T-barFlow injection probe coefficient of bearing caoacity entirely for T-type；qnet,dFlow the net injection of power of perforation device generation entirely for ejection type T-type
Resistance；qnet,sFlow the net penetration resistance of static(al) injection entirely for T-type.
The utility model has the advantages that compared with prior art, present invention has the advantage that
It is to evaluate underwater ultra-soft in exploration of geotechnical engineering practice that a kind of ejection type T-type provided by the invention flows perforation device entirely
Native strength characteristics provides strong in-situ test tool.The initial kinetic energy that T-type flows penetrometer entirely, energy are provided by catapult-launching gear
The depth of penetration of penetrometer is enough effectively improved, the guided missile formula empennages of page four can be improved the stability and injection point precision of penetrometer,
Increase acceleration transducer, force snesor, inclination sensor, sensor for pore water pressure can be further improved T-type and flow penetrometer water entirely
Lower in-situ test precision is for evaluating the special strong in-situ test tool of underwater ultra-soft soil intensity.
It is provided by the invention that the strong in-situ test tool of underwater ultra-soft soil strength characteristics, apparatus structure letter can be evaluated
Well, easy to use, test speed is fast, and testing efficiency is high, and test result is accurate and reliable, reproducible for single, quality control.
Detailed description of the invention
Fig. 1 is the organigram that a kind of ejection type T-type provided by the invention flows perforation device component arrangement entirely；
Have in figure: catapult-launching gear 1, launching cradle 1a, elastic force ring 1b launch pedestal 1c, launch slip pipe 1d and elastic sensor
1e；Guided missile formula empennage 2, four page empennage 2a, coaxial cable 2b, digital analog converter 2c and nipple 2d；T-type flows probe 3 entirely,
Including connecting rod 3a, slant angle sensor 3b, acceleration transducer 3c and sensor for pore water pressure 3d.
Specific embodiment
Embodiment 1
The present invention provides a kind of ejection type T-types to flow perforation device entirely, which consists of three parts: first part is
Catapult-launching gear 1, including launching cradle 1a, elastic force ring 1b launch pedestal 1c, launch slip pipe 1d and elastic sensor 1e；Second part
For the guided missile formula empennage 2 for stablizing penetrometer injection direction, tail portion is four page empennage 2a, and inside is equipped with coaxial cable 2b transmitting letter
Number and data, coaxial cable 2b connection internal Digital To Analog converter 2c, next top be nipple 2d；Part III is that T-type flows entirely
Probe 3, the connecting rod 3a including connecting guided missile formula empennage 2, connecting rod bottom is furnished with slant angle sensor 3b, acceleration transducer
3c and sensor for pore water pressure 3d.
Wherein:
A kind of ejection type T-type flows perforation device entirely, it is characterised in that: catapult-launching gear 1 according to initial kinetic energy demand,
Configure 8 elastic force ring 1b.
The elastic force ring 1b is connect with ejection pedestal 1c using hook and loop type.
A kind of ejection type T-type flows perforation device entirely, it is characterised in that: the ejection slip pipe 1d and guided missile formula tail
The tail portion of the wing 2 is using the embedded connection that can be popped up.
The tail portion of the guided missile formula empennage 2 uses four page empennage 2a, and single empennage is right angled triangle.
The second part guided missile formula empennage 2 flows the connecting rod 3a of probe 3 with nipple 2d and Part III T-type entirely
Connection.
The T-type flows probe 3, long 250mm, diameter 40mm, projected area 100cm entirely2。
The speed v that ejection type T-type flows perforation device entirely can be integrated to obtain by the acceleration a that acceleration transducer 3c is measured:
Depth of penetration z can be obtained by acceleration quadratic integral:
Existing research shows to flow injection probe 3 entirely due to T-type in acceleration (or deceleration) motion process, will drive periphery soil
Body accelerates (or slow down) movement, it is therefore desirable to the effect for considering additional mass m*, by following formula (calculated:
m*=Cmmsoil (3)
Wherein, CmFor mass coefficient；msoilFlow the quality that injection probe 3 arranges the soil body entirely for T-type, according to formula (4) into
Row calculates
msoil=VT-barρsoil (4)
Wherein, VT-barFlow the volume that injection probe 3 arranges the soil body, ρ entirely for T-typesoilFor the density of the soil body.
So the effective mass m that T-type flows injection probe 3 entirely can be calculated by following formula:
M=m*+msoil (5)
Penetration resistance qt,,dThe effective mass m that injection probe 3 can be flowed entirely according to T-type is obtained multiplied by the acceleration a of measurement:
Wherein, v is the speed that ejection type T-type flows perforation device entirely；Z is depth of penetration；WbInjection is flowed entirely for ejection type T-type
The buoyant weight of device in water；M is the effective mass that T-type flows injection probe 3 entirely；FDFor towrope resistance (because soil body inertia generates)；Fb
It is equal to the effective weight for arranging soil for buoyancy；Rf,ipThe strain rate coefficient of penetration resistance；Nk,T-barFlow injection probe 3 entirely for T-type
Bearing capacity coefficient；As is that ejection type T-type flows the projected area that perforation device T-type flows probe entirely entirely.
The calculation method of soil body towrope resistance is identical as the calculation method of fluid drag resistance.
Wherein, ρsFor soil body saturated density；CdFor drag coefficient.
The strain rate coefficients R of penetration resistancef,tip, it is calculated by following formula:
Wherein, γ & be strain rate,It is strain rate parameter for the reference strain rate of undrained shear strength, β.
The undrained shear strength s of the soil bodyuIt needs to deduct towrope resistance and soil strength is generated because of strain rate effect
Reduction, can be calculated as follows:
Wherein, qc,dFor the penetration resistance of measurement；u2To measure or estimate the pore pressure at cone shoulder；αcone: it is unequal
The area ratio；σv0For overlying stress；qD(it is equal to F for towrope resistanceD/As)；RF, tipFor the strain rate coefficient of penetration resistance；
Nk,T-barFlow injection 3 coefficient of bearing caoacities of probe entirely for T-type；qnet,dThe power for flowing perforation device generation entirely for ejection type T-type passes through only
Enter resistance；qnet,sFlow the net penetration resistance of static(al) injection entirely for T-type.
Claims (7)
1. a kind of ejection type T-type flows perforation device entirely, it is characterised in that: the device consists of three parts:
First part is catapult-launching gear (1), including launching cradle (1a), and elastic force ring (1b) launches pedestal (1c), is launched slip pipe (1d)
With elastic sensor (1e)；Wherein, elastic force ring (1b) is located at the top of ejection pedestal (1c), launches slip pipe (1d) and elastic force sensing
Device (1e) is located on the central axes of catapult-launching gear (1)；
Second part is the guided missile formula empennage (2) for stablizing penetrometer injection direction, and tail portion is four page empennages (2a), and inside is equipped with
Coaxial cable (2b) transmits signal and data, and coaxial cable (2b) connects internal Digital To Analog converter (2c), and lower bottom part connects for screw thread
Head (2d)；
Part III is that T-type flows probe (3) entirely, and the connecting rod (3a) including connecting guided missile formula empennage (2), connecting rod bottom is furnished with
Slant angle sensor (3b), acceleration transducer (3c) and sensor for pore water pressure (3d)；
The catapult-launching gear (1) of first part is located at top, and the guided missile formula empennage (2) of second part is located at middle part, the T of Part III
Type flows probe (3) entirely and is located at lower part.
2. a kind of ejection type T-type as described in claim 1 flows perforation device entirely, it is characterised in that: catapult-launching gear (1) is according to just
Initiating energy demand configures the elastic force ring (1b) of different number.
3. a kind of ejection type T-type as described in claim 1 flows perforation device entirely, it is characterised in that: the elastic force ring (1b)
It is connect with ejection pedestal (1c) using hook and loop type.
4. a kind of ejection type T-type as described in claim 1 flows perforation device entirely, it is characterised in that: the ejection slip pipe
The tail portion of (1d) and guided missile formula empennage (2) is using the embedded connection that can be popped up.
5. a kind of ejection type T-type as described in claim 1 flows perforation device entirely, it is characterised in that: the guided missile formula empennage
(2) tail portion uses four page empennages (2a), and single empennage is right angled triangle.
6. a kind of ejection type T-type as described in claim 1 flows perforation device entirely, it is characterised in that: the second part is led
Bullet formula empennage (2) is connect with nipple (2d) with the connecting rod (3a) that Part III T-type flows probe (3) entirely.
7. a kind of ejection type T-type as described in claim 1 flows perforation device entirely, it is characterised in that: the T-type flows probe entirely
(3), long 100-500mm, diameter 10-80mm, projected area 10-400cm2。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910763580.2A CN110512586B (en) | 2019-08-19 | 2019-08-19 | Ejection type T-shaped full-flow injection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910763580.2A CN110512586B (en) | 2019-08-19 | 2019-08-19 | Ejection type T-shaped full-flow injection device |
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| CN110512586A true CN110512586A (en) | 2019-11-29 |
| CN110512586B CN110512586B (en) | 2021-04-27 |
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Cited By (2)
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| US11391007B2 (en) * | 2020-02-05 | 2022-07-19 | Sol Solution | Measuring device and system for the geomechanical characterization of a soil, and corresponding measuring method |
| CN116124637A (en) * | 2023-02-01 | 2023-05-16 | 中国科学院力学研究所 | Indoor calibration device for impact penetration test |
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| CN110512586B (en) | 2021-04-27 |
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