CN209167034U - A kind of mud film shear strength test instrument - Google Patents
A kind of mud film shear strength test instrument Download PDFInfo
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- CN209167034U CN209167034U CN201821603105.6U CN201821603105U CN209167034U CN 209167034 U CN209167034 U CN 209167034U CN 201821603105 U CN201821603105 U CN 201821603105U CN 209167034 U CN209167034 U CN 209167034U
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- mud film
- sample
- mud
- bottom base
- lower bottom
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Abstract
The utility model discloses a kind of mud film shear strength test instrument, which includes air pressurized module, mud film sample shear module, pressure monitoring sensor, water yield monitoring modular.Mud film sample shear module is made of upper end cover, lower bottom base, ring gasket, mud film test cutting ring, sample annular seat, fixed link.Mud film sample is placed on sample annular seat, is pressurizeed by air pressurization device to sample face layer and is realized that mud film sample upper and lower level face pressure is poor, forms shear action in sample annular seat inner wall.Water yield monitoring modular is measured cylinder, beaker, balance weighing apparatus etc. and is formed by watered cup, water outlet, calculates shearing mud film displacement by drainage amount in change of water level in water outlet measurement cylinder or beaker.The utility model is easy to use, simple, can effectively measure mud film load-displacement relationship, determines that mud film shearing strength value and maximum are held one's breath pressure.
Description
Technical field
The utility model relates to a kind of mud film shear strength test instrument more particularly to city undergrounds, the tunnel across Jiang Yuehai
Deng using film forming shear strength test instrument in slurry penetration stratum in slurry-water balance type shield.
Background technique
Compared to earth pressure balanced shield, EPBS, slurry balance shield is more suitable for complicated geological environment, as high water level stratum, it is strong thoroughly
Water sand pebble layer etc..The setting of mud attribute and muddy water storehouse pressure is that slurry shield maintains stable important of excavation face in muddy water storehouse
Controlling element.Therefore, the strong mud of geological adaptability is prepared, it is most important to form high quality mud film.
Traditional Slurry confection only considers the parameters such as the specific gravity, viscosity, filter loss of mud itself, but seldom considers mud
To the Penetration Signature on stratum, cause mud unsatisfactory to the osmotic effect on stratum.The bad adaptability of mud and geological conditions is normal
It often shows mud or stratum can not be penetrated into, or infiltration number of dropouts is excessive, the mudcake of formation is too thin, and intensity is too low, is unable to maintain that
Excavate face stability.Therefore, mud must want the Penetration Signature on stratum as the important control of evaluation mud geological adaptability
Element.
Currently, domestic Ji Jia scientific research institution, such as Hohai University, Southwest Jiaotong University, mud can be carried out to stratum
Permeability test, but the appearance for being only limitted to mud film to the description of experimental result describes, or uses scale ruler measurement mud film thickness, not
The mechanical attribute of mud film is tested, quality of forming film can not be evaluated by the mechanical attribute of mud film.But the mechanics of mud film
Property excavates surface intensity to effective transmitting muddy water storehouse pressure, enhancing, and maintaining excavation face to stablize has significant impact.Since mud seeps
The mud film-strength that saturating stratum is formed is not high, Yi Fasheng disturbance deformation and influence itself mechanical property, therefore, acquisition is not disturbed
Mud film sample, design reasonable mud film shear strength test instrument and necessitate.
Summary of the invention
Aiming at the problem that slurry penetration stratum, film forming shearing strength cannot be measured effectively, the utility model provides a kind of mud film
Shear strength test instrument has many advantages, such as that small to the disturbance of mud film, test is convenient, accurate and reliable, strong applicability, can effectively supervise
The load-deformation curve of mud film is surveyed, shearing strength value is obtained.Meanwhile the maximum that can effectively measure mud film is held one's breath pressure.
To realize the function of effectively measuring mud film shearing strength and pressure of holding one's breath, technical solution adopted in the utility model
Be: a kind of mud film shear strength test instrument, it includes being fitted in by upper end cover, lower bottom base and by more fixed links
Main frame structure composed by mud film test cutting ring between end cap and lower bottom base；Sample is provided in the middle part of the lower bottom base
Annular ledge has cut mud film sample in the inner cavity of the mud film test cutting ring, and the lower part of mud film test cutting ring is sleeved on sample
On the periphery of annular ledge, mud film sample is made to be located at the surface of sample ring support；It is respectively set on the upper end cover
There is the air pressurized instrument for pressurizeing into mud film test cutting ring upper lumen and for measuring mud film test cutting ring top
The pressure sensor of pressure in inner cavity；The centre of the lower bottom base has water outlet to measure cylinder by piping connection；The water outlet
Measure and be provided with scale on the barrel of cylinder, water outlet measure the upper end of cylinder by be arranged valvular pipeline connection have watered cup with
Beaker；The beaker is placed on balance weighing apparatus.
Further, the utility model is fluted in the setting of the middle part of the lower bottom base, is placed in the groove permeable
Stone；
Further, the surface area of permeable stone described in the utility model is greater than the intracavity section face of sample ring support
Product.
Further, mud film test cutting ring described in the utility model is upper and lower equal between face and upper end cover and lower bottom base
It is provided with ring gasket.
Further, the whole height that water outlet described in the utility model measures cylinder is higher than the height of lower bottom base.
Further, the height that water outlet described in the utility model measures the pipe water outlet being connected between cylinder and beaker is big
In the whole height of sample ring support.
Specifically: the mud film shear strength test instrument of the utility model, the instrument include air pressurized module, the examination of mud film
Sample shear module, pressure monitoring sensor, water yield monitoring modular etc..Mud film sample shear module can be divided into main frame structure
And subjects, main frame structure are made of upper end cover, lower bottom base, ring gasket, fixed link, subjects directly utilize
The test cutting ring ring cutting mud film of mud film sample ring cutting instrument, avoids the Secondary Disturbance to mud film；Water yield monitoring modular is by adding
Hyponome, water outlet measure cylinder, beaker, balance weighing apparatus composition.Watered cup adds water for mud film sample subsurface.Water outlet measures cylinder side
Face indicates scale, monitors change of water level.
Before test, be sequentially placed on lower bottom base permeable stone, sample ring support, ring gasket, mud film test cutting ring,
Mud film sample, upper end cover, upper end cover are connected to air pressurized instrument, pressure sensor, and lower bottom base connection water outlet measures cylinder plus water
Funnel, and certain head is added water to mud film subsurface to by watered cup.During test, pass through air pressurized instrument pair
Mud film face layer slowly pressurizes, and realizes that mud film upper and lower level face pressure is poor, realizes sample ring support inner wall to the shear action of mud film.
It observes water yield and surveys drainage amount variation in cylinder change of water level or beaker.
The beneficial effects of the utility model are: the mud film shear strength test equipment configuration of the utility model is simple, function
It is clear, mud film shearing strength, holding one's breath property can be effectively measured, for evaluating mud to the adaptability of all kinds of formation conditions.
Detailed description of the invention
Fig. 1 is the schematic diagram of mud film shear strength test instrument of the present invention.
Specific embodiment
With reference to the accompanying drawing with apparatus structure introduction, the utility model embodiment is described further:
As shown in Figure 1, the mud film shear strength test instrument of the utility model, it include by upper end cover 1, lower bottom base 5, with
And by more fixed links 4 be fitted in the mud film test cutting ring 3(between upper end cover and lower bottom base it is substantially cylinder) formed
Main frame structure；Middle face is provided with sample ring support 6 on the lower bottom base 5, the mud film test cutting ring 3 it is interior
Mud film sample 14 is cut in chamber, the lower part of mud film test cutting ring is sleeved on the periphery of sample ring support 6, tries mud film
Sample 14 is located at the surface of sample ring support 6；It is separately provided on the upper end cover 1 to mud film test cutting ring top
The air pressurized instrument 9 to pressurize in inner cavity and the pressure sensor 8 for measuring pressure in mud film test cutting ring upper lumen；
Centre has water outlet to measure cylinder 10 by piping connection below the lower bottom base 5；The water outlet measures on the barrel of cylinder 10
It is provided with scale, there are watered cup 13 and beaker in the upper end that water outlet measures cylinder 10 by being provided with the pipeline connection of valve 11
12；The beaker 12 is placed on balance weighing apparatus 15.
Preferably, the present embodiment setting in the middle part of the upper surface of described lower bottom base 5 is fluted, it is placed in the groove permeable
Stone 7；The surface area of the permeable stone 7 is greater than the intracavity section area of sample ring support 6.
Preferably, the upper and lower of the mud film test cutting ring 3 is provided with ring between face and upper end cover 1 and lower bottom base 5
Gasket 2.
Preferably, the whole height that the water outlet measures cylinder 10 is higher than the height of lower bottom base 5；The water outlet measure cylinder 10 with
The height for the pipe water outlet being connected between beaker 12 is greater than the whole height of sample ring support 6.
Specifically, the mud film shear strength test instrument of the present embodiment includes by upper end cover 1, lower bottom base 5, ring gasket
2, the main frame structure that fixed link 4 forms is sequentially placed permeable stone 7, sample ring support 6, ring gasket on lower bottom base 5
2, mud film test cutting ring 3 and mud film sample 14.Upper end cover 1 connects air pressurized instrument 9, pressure sensor 8.Lower bottom base 5 connects
Water outlet measures cylinder 10, watered cup 13, and water and monitoring change of water level, drainage amount can be added to sample bottom.
The method of the mud film shear strength test apparatus measures mud film shearing strength of the present embodiment is as follows:
A, mud film sample 14 is cut with mud film sample ring cutting device 3, and scabbles mud film sample subsurface with native knife is cut；
B, it is sequentially placed permeable stone 7, sample ring support 6, ring gasket 2 on lower bottom base 5, and mud film will have been cut
3 lower part of mud film test cutting ring of sample 14 is sleeved on sample ring support 6；
C, air pressurized instrument 9, pressure sensor 8 are connected on upper end cover 1；
D, ring gasket 2 is attached on mud film test cutting ring 3 along face, upper end cover 1 is placed in mud film test cutting ring 3
On；It is inserted into fixed link 4, and screws both ends nut, makes sufficiently to compress between upper end cover and lower bottom base and mud film test cutting ring
Sealing；
E, by watered cup 13 to Ni Mo sample lower layer Jia Shui, until the certain quarter reached inside water outlet measuring cylinder 10
Angle value；Or by watered cup 13 to Ni Mo sample lower layer Jia Shui, until from bend pipe outflow water to beaker 12；
F, it is slowly pressurizeed to 14 face layer of mud film sample with certain speed by air pressurization device 9, observation water yield is surveyed
Change of water level in cylinder 10, bubble production, and record the maximum value of head；Or the weight change by weighing beaker 12,
Bubble production is observed, drainage amount is recorded；
G, by the mud film sample deformation amount that record pressure sensor 8 and water outlet measure cylinder 10, beaker 12 calculates, lotus is drawn
Load-deformation curve determines mud film shearing strength and holding one's breath property.
Claims (6)
1. a kind of mud film shear strength test instrument, it is characterised in that: it includes by upper end cover (1), lower bottom base (5), Yi Jitong
Excessive root fixed link (4) is fitted in main frame structure composed by the mud film test cutting ring (3) between upper end cover and lower bottom base；
Middle face is provided with sample ring support (6) on the lower bottom base (5), is cut in the inner cavity of the mud film test cutting ring (3)
There is mud film sample (14), the lower part of mud film test cutting ring is sleeved on the periphery of sample ring support (6), makes mud film sample
(14) it is located at the upper surface of sample ring support (6)；It is separately provided on the upper end cover (1) to mud film test ring
The air pressurized instrument (9) to pressurize in knife upper lumen and the pressure for measuring pressure in mud film test cutting ring upper lumen
Sensor (8)；Centre has water outlet to measure cylinder (10) by piping connection below the lower bottom base (5)；The water yield
Survey on the barrel of cylinder (10) and be provided with scale, the upper end that water outlet measures cylinder (10) pass through the valvular pipeline connection of setting have plus
Hyponome (13) and beaker (12)；The beaker (12) is placed on balance weighing apparatus (15).
2. the mud film shear strength test instrument according to claim 1, it is characterised in that: in the lower bottom base (5)
Portion's setting is fluted, and permeable stone (7) are placed in the groove.
3. the mud film shear strength test instrument according to claim 2, it is characterised in that: the surface of the permeable stone (7)
Area is greater than the intracavity section area of sample ring support (6).
4. the mud film shear strength test instrument according to claim 1, it is characterised in that: the mud film test cutting ring (3)
Upper and lower ring gasket (2) are provided between face and upper end cover (1) and lower bottom base (5).
5. the mud film shear strength test instrument according to claim 1, it is characterised in that: the water outlet measures cylinder (10)
Whole height is higher than the height of lower bottom base (5).
6. the mud film shear strength test instrument according to claim 1, it is characterised in that: the water outlet measure cylinder (10) with
The height for the pipe water outlet being connected between beaker (12) is greater than the whole height of sample ring support (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821603105.6U CN209167034U (en) | 2018-09-29 | 2018-09-29 | A kind of mud film shear strength test instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821603105.6U CN209167034U (en) | 2018-09-29 | 2018-09-29 | A kind of mud film shear strength test instrument |
Publications (1)
| Publication Number | Publication Date |
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| CN209167034U true CN209167034U (en) | 2019-07-26 |
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ID=67332610
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821603105.6U Active CN209167034U (en) | 2018-09-29 | 2018-09-29 | A kind of mud film shear strength test instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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2018
- 2018-09-29 CN CN201821603105.6U patent/CN209167034U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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