CN105891084A - Detachable mud film formation and mud film airtightness testing device and method - Google Patents
Detachable mud film formation and mud film airtightness testing device and method Download PDFInfo
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- CN105891084A CN105891084A CN201610209931.1A CN201610209931A CN105891084A CN 105891084 A CN105891084 A CN 105891084A CN 201610209931 A CN201610209931 A CN 201610209931A CN 105891084 A CN105891084 A CN 105891084A
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- 238000012360 testing method Methods 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 40
- 230000035699 permeability Effects 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 230000035515 penetration Effects 0.000 claims description 43
- 238000001914 filtration Methods 0.000 claims description 23
- 238000001764 infiltration Methods 0.000 claims description 14
- 230000008595 infiltration Effects 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 229920005479 Lucite® Polymers 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000009412 basement excavation Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001914 calming effect Effects 0.000 description 2
- 238000012407 engineering method Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/086—Investigating permeability, pore-volume, or surface area of porous materials of films, membranes or pellicules
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a detachable mud film formation and mud film airtightness testing device. The device comprises a test cylinder, a flange plate and a base, wherein the flange plate and the base are arranged at the top end and bottom end of the test cylinder respectively, the test cylinder is formed by sequential connection of a detachable upper cylinder body, a mud permeation box, a stratum layer and a filter layer box, a pressure regulating device and an air compressor are sequentially connected to the top end of the upper cylinder body, an air inlet valve is arranged between the upper cylinder body and the pressure regulating device, a mud valve is arranged on the lower portion of the upper cylinder body, a water collection device and a data acquisition device are sequentially connected to the bottom end of the filter layer box, and a drain valve is arranged between the filter layer box and the water collection device. The invention further discloses a using method of the device. The permeation process of mud on a slurry shield excavation face in the stratum can be simulated, the permeability coefficient of a mud cake, the permeability coefficient of a permeation zone or the permeability coefficient of the mud cake and permeation zone can be measured, airtightness testing can be conducted, and a basis is provided for selecting mud in the opening process under pressure; furthermore, the method is simple and easy to implement, workload is small, and time consumption is low.
Description
Technical field
The present invention relates to dismountable mud film forming and mud film tightness test device and using method.Utilize this device can be right
Slurry shield excavation face mud process of osmosis in the earth formation is simulated, can measure respectively simultaneously mud skin, permeable belt or mud skin+
The infiltration coefficient of permeable belt or carry out Air-tight Test, and method of testing involved in the present invention is simple, and workload is little, consumption
Time short, be lab simulation mud film forming and test mud skin, permeable belt, the infiltration coefficient of mud skin+permeable belt and the test of simple possible
The bubble-tight method of mud film.
Background technology
During the submerged tunnel that China's employing shield method is built, the stratum such as the sandy gravel of high osmosis, high quartz content are passed through in many meetings,
Often meet with that cutter head of shield machine tool wear is serious, the situation such as cutterhead molding and barrier, and by forced-stopping machine carry out opening the cabin cleaning or
The operations such as maintenance.Owing to being had the waters such as river, lake, structures or other reasons to be affected, from earth's surface by top, tunnel
The method that strengthening stratum-normal pressure opens the cabin is limited, and the method for opening the cabin with pressure based on engineering method of calming the anger gets more and more and used.Conventional
Engineering method of calming the anger apply in general to infiltration coefficient less than 10-2The soil layer of cm/s, for infiltration coefficient more than 10-2The coarse-grained soil of cm/s
Stratum, forms the householder methods such as the good mud film of holding one's breath property to reduce the breathability on stratum in excavation face frequently with mud, it is ensured that
The stability of excavation face.Owing to mud film is a kind of special porous media, how generally it is made up of mud skin and permeable belt two parts
To evaluate mud film and form the quality of quality be numerous workmens concern the most, logical mud skin, permeable belt, mud skin+permeable belt
Infiltration coefficient can be evaluated with mud quality of forming film in the earth formation opening the cabin as one of index evaluating mud film quality, have
It is beneficial to the safety opened the cabin with pressure carry out.And carry out permeability test or the test of mud holding one's breath property of film at the scene, the most uneconomical, and
There is also bigger risk.
Summary of the invention:
Goal of the invention: for problems of the prior art, the present invention proposes a kind of dismountable mud film forming and mud film is airtight
Property assay device and using method, slurry shield excavation face mud process of osmosis in the earth formation can be simulated, can divide simultaneously
Ce Ding mud skin, permeable belt or the infiltration coefficient of mud skin+permeable belt or carry out Air-tight Test.
Technical scheme: a kind of dismountable mud film forming and mud film tightness test device, including test cylinder, is respectively arranged on examination
Testing cylinder top and the ring flange of bottom and base, described test cylinder is by dismountable top cylinder, slurry penetration case, stratum
Case, filtering layer case are sequentially connected with composition, and cylinder top, described top is sequentially connected with regulator and air compressor machine, at top cylinder and tune
It is provided with intake valve between pressure device, is provided with mud valve in cylinder bottom, top, described be sequentially connected with captation at filtering layer bottom end
And data acquisition unit, between filtering layer case and captation, it is provided with drain valve.
Described test cylinder is the lucite cylinder of diameter 10cm, and described upper post height is 40cm, described slurry penetration
Case, stratum case height are 5cm, and it is the stainless steel mesh of 0.1mm that box bottom is one layer of aperture, described filtering layer case height
For 10cm.
Described dismountable each tank ends all has ring flange, is bolted each other.
Described each casing junction is provided with O-shaped rubber ring, for improving the sealing of device.
A kind of dismountable mud film forming and the using method of mud film tightness test device, comprise the following steps:
A) sand granule thick for loading 10cm in filtering layer case is as filtering layer, then by controlling the method for dry density at slurry penetration
Case and stratum case are respectively charged into the thick test stratum of 1cm, 5cm, by top cylinder, slurry penetration case, stratum case, filtering layer
Case bolt is fixing to be sequentially connected with, and reverse saturated stratum；
B) above slurry penetration case stratum, test mud high for about 10cm is loaded, after the cylinder of flangeseal top, regulation
Air compressor machine and regulator, set the atmospheric pressure value of slurry penetration, then open intake valve and drain valve, carries out the infiltration examination of mud
Test；
C) mud forms layer of mud skin at surface of stratum, and forms one section of permeable belt in the earth formation, by captation and data acquisition
The drainage amount of acquisition means record mud, measures the thickness of mud skin with millimeter rule；
D) terminate slurry penetration test after certain time, close drain valve, open the mud valve in the middle part of testing column, by testing column
Residue mud discharge, then slurry penetration case or stratum case removed or do not remove；
E) intake valve being again turned on testing column and drain valve, make air pressure act directly on mud skin or permeable belt, measures mud skin
Or the infiltration coefficient of permeable belt, or carry out the Air-tight Test of mud film.
In step a), filtering layer is the single particle size layer of sand of particle diameter 2-5mm, and stratum determines according to the geological environment on stratum residing for shield machine,
The dry density test of same stratum being kept to stratum is consistent.
The mud that in step b), mud is intended that in being actual engineering of opening the cabin.
Air pressure in step b) is provided by air compressor machine and is regulated by regulator, choosing and actual slurry penetration mistake of atmospheric pressure value
Mud pressure value in journey is consistent.
In step d), the time of penetration of mud should determine according to the time of penetration that mud in engineering is actual.
Whether step d) removes slurry penetration case or stratum case determines according to test objective, if the permeability measuring mud skin should will have
The stratum case of permeable belt is removed, if the slurry penetration case having mud skin should be removed by the permeability measuring permeable belt, if it is whole to measure mud film
The permeability of body or carry out the Air-tight Test of mud film, does not removes.
Beneficial effect: utilize this device can be simulated slurry shield excavation face mud process of osmosis in the earth formation, simultaneously can
Measure mud skin, permeable belt or the infiltration coefficient of mud skin+permeable belt respectively or carry out Air-tight Test, to mud during with pressure opening the cabin
Offer foundation is provided；And method of testing involved in the present invention is simple, workload is little, the shortest, is simple possible
Lab simulation mud film forming and test mud skin, permeable belt, the infiltration coefficient of mud skin+permeable belt and the test bubble-tight method of mud film.
Accompanying drawing explanation
Fig. 1 is the structural representation of the slurry penetration device of the present invention；
Fig. 2 is slurry penetration case and the main diagram of stratum case of the present invention；
Fig. 3 is slurry penetration case and the upward view of stratum case of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, it is further elucidated with the present invention, it should be understood that these embodiments are merely to illustrate the present invention and need not
In limiting the scope of the present invention, after having read the present invention, those skilled in the art repair the various equivalent form of values of the present invention
Change and all fall within the application claims limited range.
As Figure 1-3, dismountable mud film forming and mud film tightness test device, including test cylinder, it is respectively arranged on examination
Test the ring flange 1 of cylinder top and bottom；Described test cylinder is the lucite cylinder of diameter 10cm, by dismountable top
Cylinder 2, slurry penetration case 3, stratum case 4, filtering layer case 5 form, and each tank ends all has ring flange 6, passes through each other
Bolt connects, and each casing junction is equipped with O-shaped rubber ring, for improving the sealing of device；Cylinder 2 top, described top
It is sequentially connected with regulator 8 and air compressor machine 9, between top cylinder 2 and regulator 8, is provided with intake valve 7, at top cylinder
2 bottoms are provided with mud valve 10；Described it is sequentially connected with captation 12 and data acquisition unit 13 in filtering layer case 5 bottom, in filter
It is provided with drain valve 11 between layer case 5 and captation 12.Described upper post height is 40cm, described slurry penetration case and ground
Layer case height is 5cm, and it is the stainless steel mesh of 0.1mm that box bottom is one layer of aperture, and described filtering layer case height is 10cm.
Above-mentioned dismountable mud film forming and the using method of mud film tightness test device, comprise the following steps:
A) for the geological condition residing for shield machine, it is simulated experiment, filtering layer case loads the thick sand granule conduct of 10cm
Filtering layer, then the method by controlling dry density is respectively charged into 1cm, 5cm thickness experimental field in slurry penetration case and stratum case
Layer, is sequentially connected with fixing to top cylinder, slurry penetration case, stratum case and filtering layer case bolt, and reverse saturated stratum, its
Middle filtering layer is the single particle size layer of sand of particle diameter 2-5mm, and stratum is selected according to stratum, shield machine position, tries for same stratum
The dry density testing holding stratum is consistent.
B) above slurry penetration case stratum, test mud high for about 10cm is loaded, after the cylinder of flangeseal top, regulation
Air compressor machine and regulator, set the atmospheric pressure value of slurry penetration, then open intake valve and drain valve, carries out the infiltration examination of mud
Test；The mud that wherein mud is intended that in being actual engineering of opening the cabin, air pressure is provided by air compressor machine and is regulated by regulator, gas
Choosing of pressure value should be consistent with the mud pressure value during actual slurry penetration.
C) mud forms layer of mud skin at surface of stratum, and forms one section of permeable belt in the earth formation, by captation and data acquisition
The drainage amount of acquisition means record mud, measures the thickness of mud skin with millimeter rule.
D) pass through after slurry penetration certain time (time of penetration of mud should determine according to the time of penetration that mud in engineering is actual)
Air pressure in cylinder is discharged by regulator, terminates slurry penetration test.Close drain valve, open the mud valve in the middle part of testing column,
Residue mud in testing column is discharged, then one of stratum case (top be mud skin, bottom be slurry penetration band) is removed or
Do not remove；Wherein, the time of penetration of mud sets according to the mud film formation time in concrete engineering, if remove slurry penetration
Case or stratum case determine according to test objective, if the stratum case having permeable belt should be removed by the permeability measuring mud skin, ooze if measuring
The slurry penetration case having mud skin should be removed by the permeability of band thoroughly, if measuring the overall permeability of mud film or carrying out the examination of holding one's breath of mud film
Test, do not remove.
E) intake valve being again turned on testing column and drain valve, make air pressure act directly on mud skin or permeable belt, measures mud skin
Or the infiltration coefficient of permeable belt, or carry out the Air-tight Test of mud film.
Claims (10)
1. dismountable mud film forming and a mud film tightness test device, including test cylinder, sets respectively
In testing cylinder top and the ring flange of bottom and base, it is characterised in that described test cylinder is by dismountable
Top cylinder, slurry penetration case, stratum case, filtering layer case are sequentially connected with composition, and cylinder top, described top is successively
Connect regulator and air compressor machine, between top cylinder and regulator, be provided with intake valve, under the cylinder of top
Portion is provided with mud valve, described is sequentially connected with captation and data acquisition unit at filtering layer bottom end, at filtering layer case
And between captation, it is provided with drain valve.
Dismountable mud film forming the most according to claim 1 and mud film tightness test device, it is special
Levying and be, described test cylinder is the lucite cylinder of diameter 10cm, and described upper post height is 40cm,
Described slurry penetration case and stratum case height are 5cm, box bottom be one layer of aperture be 0.1mm not
Rust steel screen cloth, described filtering layer case height is 10cm.
Dismountable mud film forming the most according to claim 1 and mud film tightness test device, it is special
Levying and be, described dismountable each tank ends all has ring flange, is bolted each other.
Dismountable mud film forming the most according to claim 1 and mud film tightness test device, it is special
Levying and be, described each casing junction is provided with O-shaped rubber ring, for improving the sealing of device.
5. according to the dismountable mud film forming described in claim 1-4 any one and mud film air-tight test
The using method of device, it is characterised in that comprise the following steps:
A) sand granule thick for loading 10cm in filtering layer case is as filtering layer, then by the method controlling dry density
The thick test stratum of 1cm, 5cm it is respectively charged into, by top cylinder, mud in slurry penetration case and stratum case
Infiltration case, stratum case, filtering layer case bolt are fixing to be sequentially connected with, and reverse saturated stratum；
B) above slurry penetration case stratum, load test mud high for about 10cm, use flangeseal upper post
After body, regulation air compressor machine and regulator, set the atmospheric pressure value of slurry penetration, then open intake valve and draining
Valve, carries out the permeability test of mud；
C) mud forms layer of mud skin at surface of stratum, and forms one section of permeable belt in the earth formation, by catchmenting
Device and the drainage amount of data acquisition unit record mud, measure the thickness of mud skin with millimeter rule；
D) terminate slurry penetration test after certain time, close drain valve, open the mud valve in the middle part of testing column,
Residue mud in testing column is discharged, then slurry penetration case or stratum case is removed or both of which is not removed；
E) intake valve being again turned on testing column and drain valve, make air pressure act directly on mud skin or permeable belt
On, measure mud skin or the infiltration coefficient of permeable belt, or carry out the Air-tight Test of mud film.
Dismountable mud film forming the most according to claim 5 and the use of mud film tightness test device
Method, it is characterised in that in step a), filtering layer is the single particle size layer of sand of particle diameter 2-5mm, and stratum is according to shield
Residing for structure machine, the geological environment on stratum determines, the dry density test of same stratum being kept to stratum is consistent.
Dismountable mud film forming the most according to claim 5 and the use of mud film tightness test device
Method, it is characterised in that the mud that in step b), mud is intended that in being actual engineering of opening the cabin.
Dismountable mud film forming the most according to claim 5 and the use of mud film tightness test device
Method, it is characterised in that the air pressure in step b) is provided by air compressor machine and regulated by regulator, air pressure
Choosing of value is consistent with the mud pressure value during actual slurry penetration.
Dismountable mud film forming the most according to claim 5 and the use of mud film tightness test device
Method, it is characterised in that in step d), the time of penetration of mud should be according to the time of penetration of mud reality in engineering
Determine.
Dismountable mud film forming the most according to claim 5 and the use of mud film tightness test device
Method, it is characterised in that whether remove slurry penetration case in step d) or stratum case determines according to test objective,
If the stratum case having permeable belt should be removed, if the permeability measuring permeable belt should will have by the permeability measuring mud skin
The slurry penetration case of mud skin is removed, if measuring the overall permeability of mud film or carrying out the Air-tight Test of mud film, the most all
Do not remove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610209931.1A CN105891084B (en) | 2016-04-06 | 2016-04-06 | Dismountable mud film forming and mud film tightness test device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610209931.1A CN105891084B (en) | 2016-04-06 | 2016-04-06 | Dismountable mud film forming and mud film tightness test device and method |
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| CN105891084A true CN105891084A (en) | 2016-08-24 |
| CN105891084B CN105891084B (en) | 2019-06-14 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106769754A (en) * | 2016-11-29 | 2017-05-31 | 南京林业大学 | It is a kind of can synchro measure mud film hold one's breath during filter loss and air leakage device and method |
| CN108061696A (en) * | 2017-11-29 | 2018-05-22 | 河海大学 | A kind of device and method of indoor test mud film infiltration coefficient |
| CN108872027A (en) * | 2018-06-29 | 2018-11-23 | 东北大学 | It is a kind of it is efficient realize build-up of particles densification gas rush equipment |
| CN109307628A (en) * | 2018-09-29 | 2019-02-05 | 中铁隧道局集团有限公司 | A kind of mud film shear strength test instrument and its method for measuring mud film shearing strength |
| CN109900599A (en) * | 2019-04-16 | 2019-06-18 | 盾构及掘进技术国家重点实验室 | A kind of method slurry penetration film forming experimental provision and its measure slurry penetration performance |
| CN109975514A (en) * | 2019-04-02 | 2019-07-05 | 中山大学 | A kind of fully transparent experimental rig that the lower mud film forming of high pressure effect is held one's breath |
| CN110456027A (en) * | 2019-08-22 | 2019-11-15 | 江苏建筑职业技术学院 | A kind of slurry shield knife cutting soil body generation mud membrane pilot unit contained |
| CN112683746A (en) * | 2020-12-04 | 2021-04-20 | 山东大学 | Device and method for measuring effective stress conversion rate of slurry film forming |
| CN113640192A (en) * | 2021-08-16 | 2021-11-12 | 天津大学 | Visual penetration test device and method for simulating muddy water construction |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769754B (en) * | 2016-11-29 | 2019-05-03 | 南京林业大学 | It is a kind of can synchro measure mud film hold one's breath during filter loss and air leakage device and method |
| CN106769754A (en) * | 2016-11-29 | 2017-05-31 | 南京林业大学 | It is a kind of can synchro measure mud film hold one's breath during filter loss and air leakage device and method |
| CN108061696B (en) * | 2017-11-29 | 2021-02-09 | 河海大学 | Device and method for testing permeability coefficient of mud membrane indoors |
| CN108061696A (en) * | 2017-11-29 | 2018-05-22 | 河海大学 | A kind of device and method of indoor test mud film infiltration coefficient |
| CN108872027A (en) * | 2018-06-29 | 2018-11-23 | 东北大学 | It is a kind of it is efficient realize build-up of particles densification gas rush equipment |
| CN109307628A (en) * | 2018-09-29 | 2019-02-05 | 中铁隧道局集团有限公司 | A kind of mud film shear strength test instrument and its method for measuring mud film shearing strength |
| CN109307628B (en) * | 2018-09-29 | 2024-04-26 | 中铁隧道局集团有限公司 | Mud film shear strength test instrument and mud film shear strength measurement method thereof |
| CN109975514A (en) * | 2019-04-02 | 2019-07-05 | 中山大学 | A kind of fully transparent experimental rig that the lower mud film forming of high pressure effect is held one's breath |
| CN109900599A (en) * | 2019-04-16 | 2019-06-18 | 盾构及掘进技术国家重点实验室 | A kind of method slurry penetration film forming experimental provision and its measure slurry penetration performance |
| CN110456027A (en) * | 2019-08-22 | 2019-11-15 | 江苏建筑职业技术学院 | A kind of slurry shield knife cutting soil body generation mud membrane pilot unit contained |
| CN110456027B (en) * | 2019-08-22 | 2021-12-31 | 江苏建筑职业技术学院 | Test device for producing mud film by cutting soil body with cutter head of mud shield |
| CN112683746A (en) * | 2020-12-04 | 2021-04-20 | 山东大学 | Device and method for measuring effective stress conversion rate of slurry film forming |
| CN112683746B (en) * | 2020-12-04 | 2022-08-02 | 山东大学 | Device and method for measuring effective stress conversion rate of slurry film forming |
| CN113640192A (en) * | 2021-08-16 | 2021-11-12 | 天津大学 | Visual penetration test device and method for simulating muddy water construction |
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