CN109085036A - A kind of device and application method of Quick uniform preparation triaxial test soil sample - Google Patents
A kind of device and application method of Quick uniform preparation triaxial test soil sample Download PDFInfo
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- CN109085036A CN109085036A CN201810982984.6A CN201810982984A CN109085036A CN 109085036 A CN109085036 A CN 109085036A CN 201810982984 A CN201810982984 A CN 201810982984A CN 109085036 A CN109085036 A CN 109085036A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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Abstract
The invention discloses the devices and application method of a kind of Quick uniform preparation triaxial test soil sample.The device includes forming sample cylinder, it is consolidated into sample cylinder upper cover plate, it is consolidated into sample cylinder pedestal, piston rod, piston plate, rigid threaded rod, bolt and drainage tube, it is additionally provided with silica gel air bag, pneumatic nipple, locator and air hose, sample cylinder is consolidated into using micropore steel wire, it can drain, being consolidated on sample cylinder pedestal has conduction hole, has conduction hole in piston plate and piston rod, prepare soil sample when can not only drain up and down again can surrounding drain, there is locator on piston rod, control the soil sample height of preparation, to control the density of soil sample of preparation.Silica gel air bag is placed in consolidation cylinder and connect with the pneumatic nipple on upper cover plate, so that silica gel air bag is expanded extrusion piston plate by air compressor machine pressurization and compresses soil sample downwards, pressure is constant, uniform sample preparation.The present invention is suitable for all kinds of soil properties, uniformly can quickly prepare triaxial test soil sample, and the soil sample of preparation can be applicable to triaxial compressions, in shearing test.
Description
Technical field
The present invention relates to a kind of preparation facilities for preparing triaxial test soil sample, can Quick uniform row more particularly to one kind
Water, constant compression make all well-proportioned sample preparation device of density of soil sample, hardness and stress and its application method of preparation.It can use
In different types of soil property, the soil sample of preparation is can apply in the test such as triaxial compressions, shearing.
Background technique
Triaxial test is that the test method of soil strength index is measured in civil engineering.Indoor preparation soil sample technology substantially may be used
It is divided into two classes.Compacting process: i.e. using determining that the hammer of quality falls from determining height, one layer or layering compacted soil samples are to required
Size.But sample making course uses impact force, compacted soil samples discontinuity, lower layer's soil sample is closeer than upper layer soil sample pressure
It is real.In addition, being easy for air to be encapsulated in sample during test, it is allowed to internal and forms larger hole, be unfavorable for follow-up test
Carry out, and may cause test result distortion.Concretion method: distilled water is added to be made into the thin mud greater than liquid limit wind desiceted soil,
Enter sample preparation cylinder, applies static load at top and accelerate soil sample consolidation, saturated sample is obtained using single slope drainage concretion method in this way, but is adopted
Easily cause the harder centre in the sample of preparation or more top softer with unidirectional discharging consolidation up and down.The present invention is based on above two preparations
On the basis of soil sample, by transformation internal structure and material, invented it is a kind of quickly, uniform preparation triaxial test soil sample
Preparation facilities.
Summary of the invention
The object of the present invention is to provide the preparation facilities and its application method of a kind of Quick uniform preparation triaxial test soil sample.
The preparation facilities of Quick uniform preparation triaxial test soil sample provided by the invention, including Pneumatic controller and consolidation
At sampling device.The Pneumatic controller includes piston rod, piston plate, silica gel air bag, pneumatic nipple and air hose.Institute
It states conduction hole built in piston rod and connect the Free water generated for soil sample consolidation to be discharged with drainage tube, piston rod can pass through upper end
The conduction hole that head thread screws in piston plate is connected to piston plate, and piston rod is equipped with locator, when soil sample is compressed to setting height
Locator blocks piston rod automatically；It is provided with conduction hole above the piston plate, is equipped with O-ring seal in piston plate lateral grooves,
The a piece of permeable stone of setting, the diameter of piston plate are identical as sample cylinder inner diameter is consolidated into piston plate undercut；The silica gel air bag
Touch with the pneumatic nipple and air hose being consolidated on sample cylinder upper cover plate, gives silica gel air bag balloon by air compressor machine
Piston plate is pushed to compress soil sample.The sampling device that is consolidated into includes being consolidated into sample cylinder, being consolidated into sample cylinder upper cover plate and be consolidated into
Sample cylinder pedestal.The described sample cylinder that is consolidated into using micropore steel wire, when applying pressure compression soil sample can surrounding draining, but do not apply
Pressure will not leak mud when compressing soil sample.Piston rod and piston plate, which are placed in, to be consolidated into sample cylinder, and piston rod, which runs through, to be consolidated into
The length of sample cylinder and piston rod, which is greater than, is consolidated into sample cylinder；Described is consolidated into sample cylinder upper cover plate equipped with air inlet, with pneumatic screw thread
Connector connection.It is consolidated into the aperture for being equipped among sample cylinder upper cover plate and piston rod being allowed to pass through.Sample cylinder upper cover plate surrounding is consolidated into set
There are 3 apertures, rigid threaded rod, which may pass through the hole and be bolted, to be consolidated into sample cylinder upper cover plate and be consolidated into sample cylinder, convenient for tearing open
It unloads.It is consolidated into sample cylinder upper cover plate groove and is equipped with O-ring seal, for sealing upper cover plate and at sample cylinder junction；Described consolidates
Forming sample cylinder pedestal includes the conduction hole at center and the conduction hole of side wall, Free water the drawing by base center that soil sample consolidation generates
The conduction hole that discharge orifice flows to side wall is discharged from the side wall of pedestal, is easy for connecing drainage this is because opening conduction hole in base side
Pipe, so that device can be placed smoothly.It is consolidated into sample cylinder pedestal and is surrounded by 3 apertures, rigid threaded rod passes through the hole and passes through spiral shell
Bolt is consolidated into sample cylinder pedestal and is consolidated into sample cylinder, easy to disassemble.It is consolidated into sample cylinder base groove and is equipped with O-ring seal,
Sample cylinder pedestal is consolidated into for sealing and is consolidated into sample cylinder junction.It is consolidated into sample cylinder inner diameter and is consolidated into sample cylinder upper cover plate
Protrusion place among the groove of sample cylinder pedestal is equal with being consolidated into.The present apparatus is to be pushed away by air compressor machine to silica gel air bag balloon
Piston plate, which compresses soil sample and is consolidated into sample cylinder, to be drained, so not having to the air-tightness for considering consolidation device, reduce inspection
Look into the tedious steps of consolidation device air-tightness.The device is only consolidated into sample cylinder and uses using micropore steel wire, remaining device material
Matter is all made of stainless steel.
The aperture of micropore steel wire is 0.05~0.1mm.
The application method of Quick uniform of the present invention preparation triaxial test preparation of soil sample device the following steps are included:
Step 1: soil sample air-dry being sieved 2mm, is configured to the mud that moisture content is 2 times of soil sample liquid limits, stirring 1 day until mud
Slurry is uniform.
Step 2: pneumatic nipple being tightened in the air inlet position being consolidated into above sample cylinder upper cover plate with spanner, then will
Silica gel balloon interface encases air hose one from being consolidated into sample cylinder upper cover plate air inlet and pass beneath pneumatic nipple, then will
The air hose for being connected with silica gel air bag is inserted into pneumatic nipple, and pneumatic nipple can tightly block air hose, such silica gel
Air bag just touches with air hose.Air hose other end is connect with air compressor machine, and ventilation checks the airtight of air hose and silica gel air bag
Property.
Step 3: being consolidated into sample cylinder inner wall one layer of vaseline of painting with hairbrush, be then attached to the identical geotextiles of diameter solid
Form sample cylinder inner wall, and both ends are longer than and are consolidated into sample cylinder.
Step 4: being each passed through with 3 rigid threaded rods and be consolidated into 3 apertures of sample cylinder pedestal by bolt for rigid threaded rod
It is fixed on the base.
Step 5: with hairbrush be consolidated into sample cylinder base groove apply one layer of vaseline, be consolidated into sample cylinder pedestal put it is a piece of
Permeable stone, then the filter paper soaked is put on permeable stone, it then will be consolidated into sample cylinder and be placed in the groove of pedestal (the soil grown
Work cloth, which is crushed on, to be consolidated under sample cylinder) because there is O-ring seal in the groove of pedestal, at sample cylinder and pedestal junction quilt
Sealing, will not leak mud when putting mud.
Step 6: the mud prepared being poured into be consolidated into sample cylinder be consolidated into 3~4 centimeters of sample cylinder top to distance and stop
Only slip casting.
Step 7: piston rod and piston plate being connected, put filter paper that one soaks on the permeable stone of piston plate, then
Piston plate is placed on mud upper surface because piston plate is identical as sample cylinder inner diameter is consolidated into and piston plate lateral grooves in set
There is O-ring seal, so piston plate is closely affixed with sample cylinder is consolidated into, cylinder will not be fallen into when not applying pressure extrusion piston plate
It is interior.Piston plate upper end has 0.5 centimetre or so of space for putting silica gel air bag away from sample cylinder top is consolidated into.
Step 8: being consolidated into one layer of vaseline of painting in sample cylinder upper cover plate groove with hairbrush, then will be consolidated into sample cylinder upper cover
Plate central small hole alignment piston rod is passed down through piston rod, and is consolidated into 3 apertures around sample cylinder upper cover plate and is each passed through fixation
3 rigid threaded rods on pedestal, which make to be consolidated into sample cylinder and are placed in, is consolidated into sample cylinder upper cover plate groove that (geotextiles grown are pressed
In the case where being consolidated into sample cylinder), sample cylinder upper cover plate is consolidated into finally by bolt.It is equipped with O-ring seal in upper cover plate groove, makes
It is consolidated into sample cylinder and upper cover plate junction seals.
Step 9: by the locator on piston rod according to the height setting position of soil sample to be prepared, when soil sample is compressed into institute
When the height needed, locator blocks piston rod automatically.
Step 10: connecting drainage tube respectively in the conduction hole of the conduction hole and piston rod that are consolidated into sample cylinder base side wall, use
In the Free water that discharge soil sample consolidation generates.
Step 11: according to predetermined on-load pressure, so that silica gel air bag is expanded extrusion piston plate using air compressor machine pressurization
Compression soil sample downwards, pressure is constant, uniform sample preparation.
Step 12: after the completion of sample preparation, turning off air compressor machine, unclamp the bolt of firm banking, remove pedestal, remove on piston rod
Locator, then open air compressor machine again, improving pressure makes silica gel air sac pressing piston plate and release the soil sample prepared.
The soil sample of above method preparation is saturation, and the device also can be used in the soil sample to prepare different water cut.
Then mud changes the soil that distilled water to required moisture content is sprayed in wind desiceted soil powder into, and it is uniform to be placed in polybag wetting for 24 hours.
It piston rod and is consolidated into sample cylinder pedestal and changes into without conduction hole.Geotextiles change geomembrane into.It is made according to above-mentioned steps 1~12
Standby soil sample, can be obtained the soil sample of required moisture content.
Beneficial effects of the present invention:
1, the sample cylinder material of the present invention that is consolidated into, can surrounding row when applying pressure extrusion soil sample using micropore steel wire
Water, make preparation density of soil sample, hardness it is uniform, improve by it is unidirectional up and down discharging consolidation cause prepare sample above and below top compared with
Hard intermediate softer disadvantage, and can accelerate to drain, to greatly shorten the time of preparation soil sample.
2, Pneumatic controller of the present invention compresses silica gel air sac pressing piston plate downwards using air compressor machine pressurization
Soil sample, pressure is constant, keeps the soil sample of preparation stress in compressed whole process identical.In addition because the present apparatus is using pneumatic
Nipple can easily connect air hose and silica gel air bag, ensure that the air-tightness of Pneumatic controller well.
3, consolidation device of the present invention is to push piston plate compression soil to silica gel air bag balloon by air compressor machine
It sample and is consolidated into sample cylinder and can also drain, so not having to the air-tightness for considering consolidation device.Reduce and checks that consolidation device is airtight
The tedious steps of property.
4, piston rod of the present invention is equipped with locator, can control soil sample height to be prepared, so that can control will make
Standby density of soil sample, and be consolidated into sample cylinder, be consolidated into sample cylinder upper cover plate, be consolidated into sample cylinder pedestal, be by rigid threaded rod and
Bolt is fixed, easy to disassemble, and sampling is convenient.
In conclusion the present invention be one kind can Quick drainage, constant compression, prepare uniform triaxial test soil sample preparation dress
It sets and its application method.
Detailed description of the invention
Fig. 1 is the device of the invention structural schematic diagram；
Fig. 2 is consolidated into sample cylinder schematic diagram for of the invention；
Fig. 3 is consolidated into schematic diagram above sample cylinder upper cover plate for of the invention；
Fig. 4 is consolidated into schematic diagram below sample cylinder upper cover plate for of the invention；
Fig. 5 is consolidated into sample cylinder submounts schematic diagram for of the invention；
Fig. 6 is consolidated into schematic diagram below sample cylinder pedestal for of the invention；
Fig. 7 is piston rod of the invention, piston plate, locator and its connection schematic diagram；
Fig. 8 is silica gel air bag of the invention and pneumatic nipple connection schematic diagram；
Fig. 9 is rigid threaded rod of the invention and bolt schematic diagram；
Figure 10 is rigid threaded rod firm banking schematic diagram of the invention.
In figure: 1- is consolidated into sample cylinder, and 2- is consolidated into sample cylinder upper cover plate, (2-1)-upper cover plate central small hole, (2-2)-air inlet
Hole, (2-3)-upper cover plate surrounding aperture, (2-4)-O-ring seal, 3- are consolidated into sample cylinder pedestal, the drainage of (3-1)-base center
Hole, (3-2)-base side wall conduction hole, (3-3)-pedestal surrounding aperture, (3-4)-O-ring seal, 4- piston rod, (4-1)-are living
Stopper rod top conduction hole, 5- piston plate, conduction hole above (5-1)-piston plate, (5-2)-O-ring seal, (5-3)-permeable stone,
6- silica gel air bag, (6-1)-silica gel balloon interface, the pneumatic nipple of 7-, 8- locator, 9- rigid threaded rod, 10- bolt, 11-
Drainage tube, 12- air hose.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9 and Figure 10, Quick uniform prepares triaxial test soil
The device of sample, including Pneumatic controller and it is consolidated into sampling device.The Pneumatic controller includes piston rod 4, piston plate
5, silica gel air bag 6, pneumatic nipple 7 and air hose 12.It conduction hole 4-1 built in the piston rod 4 and is connect with drainage tube 11
The Free water generated for soil sample consolidation to be discharged, piston rod 4 can be threaded by upper end the conduction hole 5-1 of piston plate 5 with
Piston plate 5 is connected to, and piston rod 4 is equipped with locator 8, blocks piston rod 4 automatically when soil sample is compressed to setting height locator 8；
The piston plate 5 is provided with conduction hole 5-1 above, is equipped with O-ring seal 5-2 in 5 lateral grooves of piston plate, in 5 undercut of piston plate
A piece of permeable stone 5-3 is set, and the diameter of piston plate 5 is identical as 1 inner diameter of sample cylinder is consolidated into；The silica gel air bag 6 and consolidation
At the pneumatic nipple 7 and the contiguity of air hose 12 on sample cylinder upper cover plate 2, give silica gel air bag 6 balloon by air compressor machine
Piston plate 5 is pushed to compress soil sample.The sampling device that is consolidated into includes being consolidated into sample cylinder 1, being consolidated into sample cylinder upper cover plate 2 and consolidate
At sample cylinder pedestal 3.The described sample cylinder 1 that is consolidated into uses micropore steel wire, when applying pressure compression soil sample can surrounding draining, but not
Mud will not be leaked when applying pressure compression soil sample.Piston rod 4 and piston plate 5, which are placed in, to be consolidated into sample cylinder 1, and piston rod 4 passes through
Fasten form sample cylinder 1 and piston rod 4 length be greater than be consolidated into sample cylinder 1；Described is consolidated into sample cylinder upper cover plate 2 equipped with air inlet
2-2 is connect with pneumatic nipple 7.It is consolidated into the aperture 2-1 for being equipped among sample cylinder upper cover plate 2 and piston rod 4 being allowed to pass through.Gu
Form sample cylinder upper cover plate 2 and be surrounded by 3 aperture 2-3, rigid threaded rod 9 may pass through hole 2-3 and is consolidated by bolt 10
Sample cylinder upper cover plate 2 and it is consolidated into sample cylinder 1, it is easy to disassemble.It is consolidated into 2 groove of sample cylinder upper cover plate and is equipped with O-ring seal 2-4, use
In sealing upper cover plate 2 and it is consolidated into 1 junction of sample cylinder；Described is consolidated into the conduction hole 3-1 and side that sample cylinder pedestal 3 includes center
The conduction hole 3-2 of wall, the Free water that soil sample consolidation generates by the conduction hole 3-1 of base center flow to the conduction hole 3-2 of side wall from
The side wall of pedestal 3 is discharged, and is easy for connecing drainage tube 11 this is because opening conduction hole 3-2 in 3 side wall of pedestal, so that device can be steady
Placement.It is consolidated into sample cylinder pedestal 3 and is surrounded by 3 aperture 3-3, it is fixed by bolt 10 that rigid threaded rod 9 may pass through hole 3-3
Pedestal 3 and it is consolidated into sample cylinder 1, it is easy to disassemble.It is equipped with O-ring seal 3-4 in 3 groove of pedestal, is consolidated into sample cylinder bottom for sealing
Seat 3 and is consolidated into 1 junction of sample cylinder.It is consolidated into 1 inner diameter of sample cylinder and is consolidated into sample cylinder upper cover plate 2 and is consolidated into sample cylinder pedestal
Protrusion place is equal among 3 groove.Because the present apparatus is to push piston plate 5 to 6 balloon of silica gel air bag by air compressor machine
Compressing soil sample and being consolidated into sample cylinder 1 can also drain, so not having to the air-tightness for considering consolidation device, reduce inspection consolidation and fill
Set the tedious steps of air-tightness.
Specifically, being consolidated into sample cylinder 1 is micropore steel wire material, and aperture is 0.05~0.1mm.
Specifically, it is consolidated into sample cylinder upper cover plate 2, is consolidated into sample cylinder pedestal 3, piston rod 4, piston plate 5, pneumatic nipple
7, locator 8, rigid threaded rod 9 and bolt 10 are stainless steel materials.
Specifically, silica gel air bag material 6 is silica gel material.
Specifically, drainage tube 11 and air hose 12 are plastic materials.
The application method provided by the invention for quickly, uniformly preparing triaxial test preparation of soil sample device are as follows:
Step 1: soil sample air-dry being sieved 2mm, is configured to the mud that moisture content is 2 times of soil sample liquid limits, stirring 1 day until mud
Slurry is uniform.
Step 2: pneumatic nipple 7 being tightened at the air inlet 2-2 above upper cover plate 2 with spanner, then by silica gel
Balloon interface 6-1 passes through pneumatic nipple 7 from air inlet 2-2 below upper cover plate 2 and encases air hose 12 1, will then be connected with
The air hose 12 of silica gel air bag 6 is inserted into pneumatic nipple 7, and pneumatic nipple 7 tightly can block air hose 12, such silicon
Glue air bag 6 just touches with air hose 12.12 other end of air hose is connect with air compressor machine, and ventilation checks air hose 12 and silica gel gas
The air-tightness of capsule 6.
Step 3: being consolidated into 1 inner wall of sample cylinder, one layer of vaseline of painting with hairbrush, be then attached to the identical geotextiles of diameter
It is consolidated into 1 inner wall of sample cylinder, and both ends are longer than and are consolidated into sample cylinder 1.
Step 4: be each passed through with 3 rigid threaded rods 9 be consolidated into 3 aperture 3-3 of sample cylinder pedestal 3 will be rigid by bolt 10
Property screw rod 9 is fixed on the base 3.
Step 5: being consolidated into one layer of vaseline of painting in 3 groove of sample cylinder pedestal with hairbrush, putting one being consolidated into sample cylinder pedestal 3
Piece permeable stone, then the filter paper soaked is put on permeable stone, then will be consolidated into sample cylinder 1 and is placed in the groove of pedestal 3 and grow
Geotextiles be crushed on and be consolidated under sample cylinder 1 because there is O-ring seal 3-4 in the groove of pedestal 3, at sample cylinder 1 and pedestal
3 junctions are sealed, and mud will not be leaked when putting mud.
Step 6: the mud prepared being poured into be consolidated into sample cylinder 1 to distance be consolidated into 1 top of sample cylinder, 3~4 centimeters
Stop slip casting.
Step 7: piston rod 4 and piston plate 5 being connected, put filter paper that one soaks in the permeable stone 5-3 of piston plate 5
On, piston plate 5 is then placed on mud upper surface, because piston plate 5 is identical as 1 inner diameter of sample cylinder is consolidated into and piston plate 5
It is equipped with O-ring seal 5-2 in lateral grooves, so piston plate 5 is closely affixed with sample cylinder 1 is consolidated into, it is living not apply pressure extrusion
It will not be fallen into cylinder 1 when seben 5.5 upper end of piston plate has 0.5 centimetre or so of space for putting silicon away from 1 top of sample cylinder is consolidated into
Glue air bag 6.
Step 8: being consolidated into one layer of vaseline of painting in 2 groove of sample cylinder upper cover plate with hairbrush, then will be consolidated on sample cylinder
2 central small hole 2-1 of cover board alignment piston rod 4 is passed down through piston rod 4, and is consolidated into 3 aperture 2-3 around sample cylinder upper cover plate 2
Be each passed through be fixed on the base 33 rigid threaded rods 9 make to be consolidated into sample cylinder 1 be placed in be consolidated into 2 groove of sample cylinder upper cover plate it is long
Geotextiles out, which are crushed on, to be consolidated under sample cylinder 1, is consolidated into sample cylinder upper cover plate 2 finally by bolt 10.It is consolidated into sample cylinder
It is equipped with O-ring seal 2-4 in 2 groove of upper cover plate, make to be consolidated into sample cylinder 1 and is consolidated into the sealing of 2 junction of sample cylinder upper cover plate.
Step 9: by the locator 8 on piston rod 4 according to the height setting position of soil sample to be prepared, when soil sample is compressed into
When required height, locator 8 blocks piston rod 4 automatically.
Step 10: connecting and draw respectively in the conduction hole 4-1 of the conduction hole 3-2 and piston rod 4 that are consolidated into 3 side wall of sample cylinder pedestal
Flow tube 11, the Free water generated for soil sample consolidation to be discharged.
Step 11: according to predetermined on-load pressure, so that silica gel air bag 6 is expanded extrusion piston plate using air compressor machine pressurization
5 compress downwards soil sample, and pressure is constant, uniform sample preparation.
Step 12: after the completion of sample preparation, turning off air compressor machine, unclamp the bolt 10 of firm banking 3, remove pedestal 3, remove piston
Locator 8 on bar 4, then opens air compressor machine again, and improving pressure prepares 6 extrusion piston plate 5 of silica gel air bag and releasing
Soil sample.
The soil sample of above method preparation is saturation, and the device also can be used in the soil sample to prepare different water cut.
Then mud changes the soil that distilled water to required moisture content is sprayed in wind desiceted soil powder into, and it is uniform to be placed in polybag wetting for 24 hours.
It piston rod and is consolidated into sample cylinder pedestal and changes into without conduction hole.Geotextiles change geomembrane into.It is made according to above-mentioned steps 1~12
Standby soil sample, can be obtained the soil sample of required moisture content.
Above in conjunction with attached drawing and technical solution, description of specific embodiments of the present invention.It retouches certain this part
The only present invention is stated to demonstrate and explain, and any equivalent transformation made by technical solution according to the present invention, it should belong to
Protection scope of the present invention.
Claims (5)
1. a kind of device of Quick uniform preparation triaxial test soil sample, including be consolidated into sample cylinder (1), be consolidated into sample cylinder upper cover plate
(2), it is consolidated into sample cylinder pedestal (3), piston rod (4), piston plate (5), rigid threaded rod (9), bolt (10) and drainage tube (11),
It is characterized in that: further including silica gel air bag (6), pneumatic nipple (7), locator (8) and air hose (12), described is consolidated into
Sample cylinder (1) uses micropore steel wire, is consolidated into sample cylinder (1) outer wall and indicates scale；The sample cylinder upper cover plate (2) that is consolidated into is equipped with
Air inlet (2-2), air inlet (2-2) are connect with pneumatic nipple (7)；Sample cylinder upper cover plate (2) center is consolidated into equipped with piston
The aperture (2-1) that bar (4) passes through；It is consolidated into sample cylinder upper cover plate (2) and is surrounded by 3 apertures (2-3), rigid threaded rod (9) passes through
Aperture (2-3) is consolidated into sample cylinder upper cover plate (2) and is consolidated into sample cylinder (1) by bolt (10)；Upper cover plate (2) is fluted,
It is equipped with O-ring seal (2-4) in groove, for sealing upper cover plate (2) and being consolidated into sample cylinder (1) junction；Described is consolidated into
Sample cylinder pedestal (3) includes base center conduction hole (3-1), side wall conduction hole (3-2), side wall conduction hole (3-2) and drainage tube
(11) Free water that connection discharge soil sample consolidation generates；Pedestal (3) is surrounded by 3 apertures (3-3), and rigid threaded rod (9) passes through
The hole (3-3) is by bolt (10) firm banking (3) and is consolidated into sample cylinder (1)；O-ring seal (3- is equipped in pedestal (3) groove
4) sealed base (3), are used for and are consolidated into sample cylinder (1) junction；It is consolidated into the recessed of sample cylinder (1) inner diameter and upper cover plate (2)
Slot, groove intermediate ledge split-phase of pedestal (3) etc.；Scale is indicated on the piston rod (4) and is had locator (8), is used for
Control soil sample height；Conduction hole (4-1) connect the Free water that discharge soil sample consolidation generates with drainage tube (11) on piston rod (4)；
The piston plate (5) is equipped with conduction hole (5-1) above, and conduction hole (5-1) connects with the piston rod (4) with conduction hole (4-1)
It connects and communicates, be equipped with O-ring seal (5-2) in piston plate (5) lateral grooves, a piece of permeable stone (5- of setting in piston plate (5) undercut
3), piston plate (5) diameter is equal with sample cylinder (1) inner diameter is consolidated into；The interface (6-1) of the silica gel air bag (6) is from consolidation
Air inlet (2-2) is passed beneath at sample cylinder upper cover plate (2) to connect with pneumatic nipple (7), air hose (12) also with pneumatic spiral shell
Line connector (7) connection, pressurizes to silica gel air bag (6), silica gel air bag (6) extrusion piston plate (5) is made to compress soil sample downwards.
2. quick, uniform preparation triaxial test soil sample device according to claim 1, it is characterised in that: the consolidation
Use micropore steel wire at sample cylinder (1), when applying pressure extrusion soil sample can surrounding draining, the aperture of micropore steel wire is 0.05~
0.1mm。
3. Quick uniform according to claim 1 prepares triaxial test soil sample device, it is characterised in that: passed through using air compressor machine
Air hose (12) is connected to pneumatic nipple (7) and silica gel air bag (6), and silica gel air bag (6) extrusion piston plate (5) compresses downwards
Soil sample, pressure is constant to make soil sample uniform force, keeps the soil sample of preparation uniform.
4. a kind of method using the preparation triaxial test soil sample device of Quick uniform described in 3 any one of claims 1 to 3,
It is characterized in that including the following steps: that soil sample air-dry is sieved 2mm first, is configured to the mud that moisture content is 2 times of soil sample liquid limits, stirs
It mixes 1 day until mud slurry uniform；Pneumatic nipple (7) is tightened in spanner and is consolidated into the air inlet of sample cylinder upper cover plate (2) above
At hole (2-2), then silica gel balloon interface (6-1) is passed beneath pneumatically from sample cylinder upper cover plate (2) air inlet (2-2) is consolidated into
Nipple (7) encases air hose (12) one, and the air hose (12) for being connected with silica gel air bag (6) is then inserted into pneumatic screw thread and is connect
Head (7), the card primary air pipe (12) of pneumatic nipple (7) tightly, silica gel air bag (6) and air hose (12) are touched；Air hose
(12) other end is connect with air compressor machine, and ventilation checks the air-tightness of air hose (12) and silica gel air bag (6)；Check it is errorless after, use
3 rigid threaded rods (9) are each passed through that be consolidated into 3 apertures (3-3) of sample cylinder pedestal solid by rigid threaded rod (9) by bolt (10)
It is scheduled on and is consolidated on sample cylinder pedestal (3), then place to be placed on permeable stone and permeable stone on being consolidated into sample cylinder pedestal (3) and soak
Filter paper, the sample cylinder (1) that is consolidated into for posting geotextiles is placed on the groove for being consolidated into sample cylinder pedestal (3), groove be equipped with it is O-shaped
Sealing ring (3-4) will be configured to the mud that moisture content is 2 times of soil sample liquid limits and pour into be consolidated into sample cylinder (1) to cylinder top 3~4
Stop grouting when centimeters；By piston rod (4) top with the conduction hole (5-1) for screwing in piston plate (5) at screw thread, work is connected
After stopper rod (4) and piston plate (5), the filter paper soaked is placed on the permeable stone (5-3) of piston plate (5), then piston plate is placed on
Be consolidated at sample cylinder (1) mud surface, piston plate (5) is identical as sample cylinder (1) diameter is consolidated into and piston plate (5) lateral grooves in
It equipped with O-ring seal (5-2), is closely affixed, will not be fallen into when not applying pressure in cylinder (1) with sample cylinder (1) is consolidated into；Consolidation
Piston rod (4) are passed down through at central small hole (2-1) alignment piston rod (4) of sample cylinder upper cover plate (2), and are consolidated into sample cylinder upper cover
3 apertures (2-3), which are each passed through 3 rigid threaded rods (9) for being fixed on and being consolidated on sample cylinder pedestal (3), around plate (2) makes to consolidate
It is placed in and is consolidated into sample cylinder upper cover plate (2) groove at sample cylinder (1), be consolidated into sample cylinder upper cover plate finally by bolt (10)
(2)；Sample cylinder upper cover plate (2) groove is consolidated into equipped with O-ring seal (2-4), make to be consolidated into sample cylinder (1) with upper cover plate (2)
Junction sealing；By the locator (8) on piston rod (4) according to the height setting position that prepare soil sample, when soil sample is compressed
When to required height, locator (8) blocks piston rod (4) automatically；Piston rod (4) conduction hole (4-1) and be consolidated into sample
The conduction hole (3-2) of cylinder pedestal (3) side wall connects drainage tube (11) respectively；According to predetermined on-load pressure, using pneumatics
Machine pressurization makes silica gel air bag (6) extrusion piston plate (5) compress soil sample downwards, and pressure is constant, soil sample uniform force, and device surrounding
It drains up and down, density of soil sample, hardness and the stress of preparation can be made all very uniformly；After the completion of sample preparation, turn off air compressor machine, pine
The bolt (10) for opening firm banking (3), removes pedestal (3), removes the locator (8) on piston rod (4), is then again turned on sky
Press, improving pressure makes silica gel air bag (6) extrusion piston plate (5) release the soil sample prepared.
5. a kind of application method of Quick uniform preparation triaxial test soil sample device as claimed in claim 4, it is characterised in that:
Before mud loading is consolidated into sample cylinder, first it is being consolidated into sample cylinder inner wall and is being consolidated into sample cylinder base groove one layer of vaseline of painting.
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| CN114166601A (en) * | 2021-12-02 | 2022-03-11 | 浙江大学 | Bidirectional press-in type triaxial sample preparation device and method based on soil stress history |
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