CN108375532A - Infiltration experiment device and test method - Google Patents
Infiltration experiment device and test method Download PDFInfo
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- CN108375532A CN108375532A CN201810015805.1A CN201810015805A CN108375532A CN 108375532 A CN108375532 A CN 108375532A CN 201810015805 A CN201810015805 A CN 201810015805A CN 108375532 A CN108375532 A CN 108375532A
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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
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
Abstract
The present invention relates to infiltration experiment device and test methods, experimental rig includes the pedestal for being internally provided with horizontal perforative channel, it covers balancing gate pit, opening block set set on pedestal top, sample cap, seepy material and pressure-measuring pipe, it is equipped with seepy material successively from low to high above the indoor opening block set of pressure that pedestal and balancing gate pit's cover surround, soil sample, seepy material and sample cap, it is wrapped up and is connected in opening block set using the flexible material of sealing, opening block set is connected to the channel of pedestal, it covers top and is equipped with water outlet and water inlet in balancing gate pit, sample cap is equipped with and extends vertically through the perforation channels of itself, the perforation channels are connected by water pipe with the water outlet on balancing gate pit's cover, the water inlet of base passages is connected with pressure-measuring pipe.The present invention, to the flexible contact of sample, can be well adapted for specimen size variation, confining pressure secondly is arranged to sample using the flexible material of sealing, realize and fitted closely between the flexible material of sealing and sample, keep the infiltration coefficient measured more accurate.
Description
Technical field
The invention belongs to civil engineering experimental technique fields, and are specifically related to infiltration experiment device and test method.
Background technology
The permeability test of traditional soil body is divided into constant head and variable head permeability test, and wherein variable head permeability test is suitable for
Fine grained soil (clay soil and slity soil), there are two types of the permeability apparatus mainly used, first, earthwork test rule (SL237-1999)
Defined southern 55 type infiltration experiment device；Second is that varying head infiltration examination as defined in highway earthwork test rule (JTGE40-2007)
Experiment device.The permeability vessel of the two is mainly made of upper cover, pedestal, block set, cutting ring, seepy material, screw rod etc., is being hung down with cutting ring
Straight or parallel soil sample level cuts undisturbed sample or disturbed soil is prepared into the sample of given density, fully after saturation, according to experiment
Operating procedure measures infiltration coefficient.
For freeze thawing or the permeability test of drying and watering cycle sample, earthwork test rule (SL237-1999) and highway geotechnique examination
Regulation (JTGE40-2007) is tested temporarily to be not directed to about this respect content.During actual tests, sample is followed through freeze thawing or dry and wet
Breathing phenomenon can occur for volume when ring acts on, if cutting ring is on the one hand carried out sample preparation as mold, sample is together with cutting ring by freezing
Melt or drying and watering cycle after because cutting ring is different from the breathing attribute that sample varies with temperature, then will appear disengagement phenomenon between the two；
If on the other hand taking out sample from cutting ring, sample individually after freeze thawing or drying and watering cycle, places into cutting ring, even if trying
Vaseline is smeared around sample, it is also difficult to accomplish to fit closely with cutting ring.Once the pore channel between sample and cutting ring is as one
Partial percolation path then causes the infiltration coefficient of test measurement bigger than normal.In conclusion the infiltration experiment device of traditional soil body is suitable
With being limited in scope, permeability apparatus need to be further improved perfect.
Invention content
The present invention provides one kind and can accurately measure the soil body and ooze for insufficient existing for existing geotechnological infiltration experiment device
The experimental rig and test method and soil sample of saturating coefficient cause specimen size to be sent out through freeze thawing, drying and watering cycle or other effects
Infiltration coefficient after changing.
In order to achieve the above object, the technical solution adopted by the present invention is：
A kind of infiltration experiment device, including the balancing gate pit that is internally provided with the pedestal in horizontal perforative channel, is connected with pedestal
Cover, the opening block set set on pedestal top, sample cap, seepy material and the pressure measurement that percolating fluid and infiltration hydraulic pressure are provided for soil sample
It is equipped with seepy material, soil sample, saturating above pipe, pedestal and the indoor opening block set of the pressure that surrounds of balancing gate pit's cover successively from low to high
Seepy material, soil sample and sample cap are wrapped up using the flexible material of sealing and are connected to opening block set by water material and sample cap
On, the opening block set is connected to the channel of pedestal, and balancing gate pit covers top and is equipped with water outlet and water inlet, and sample cap is equipped with vertical
Through the perforation channels of itself, the perforation channels are connected by the water outlet on water pipe and balancing gate pit cover, base passages into
Pipeline between the mouth of a river and pressure-measuring pipe is equipped with inlet valve one.
Further, the top of balancing gate pit's cover is equipped with first exhaust valve.
Further, the other end of the base passages is equipped with second exhaust valve.
Further, which further includes water supply installation, and it is first that the main water outlet pipe of water supply installation is punished in first node
Branch pipe and the second branch pipe, the first branch pipe are connected with the water inlet that balancing gate pit is covered, and the water inlet of balancing gate pit's cover is equipped with inlet valve
Two, the second branch pipe is third branch pipe and the 4th branch pipe in second node punishment, the water inlet in third branch pipe connect base channel, the
Four branch pipes connect the pressure-measuring pipe, and inlet valve one is located on the 4th branch pipe, and the second branch pipe is equipped with inlet valve three, described
The lowest water level of water supply installation is higher than the peak level of pressure-measuring pipe, and the water supply installation provides percolating fluid and the balancing gate pit of pressure-measuring pipe
Soil sample confining pressure.
Further, opening block set is internally provided with through-hole, upper end opening and is higher by pedestal, outside dimension and soil sample size one
It causes, the base passages are connected to the through-hole of the opening block set.
Further, it is tightly connected between the pedestal and balancing gate pit's cover, sealed connection mode is preferably pedestal and pressure
By sealing ring and being bolted between the cover of power room.
Using the test method of above-mentioned infiltration experiment device, include the following steps：
(1) soil sample is prepared；
(2) it is sequentially placed seepy material, soil sample, seepy material and sample cap from low to high in opening block set, then uses
It seals flexible material to wrap seepy material, soil sample, seepy material and sample cap together with opening block set, tightens sealing
The contact position of flexible material and opening block set, sample cap, and install the infiltration experiment device；
(3) water inlet covered by balancing gate pit is filled to full of balancing gate pit；
(4) by the water inlet water filling of base passages until fill channel and opening block set inner via hole；
(5) inlet valve one is opened, piezometric level is adjusted to experiment desired height, the water level of water supply installation carries for soil sample
For confining pressure, pressure-measuring pipe provides percolating fluid；
(6) it waits for that the water outlet of balancing gate pit's cover has water spilling, start timing and reads initial head, after time t, then read
Head at this time is taken, it is continuous to survey numeration time, so that piezometric head is gone up to needing height, then continuous survey numeration time, experiment
It terminates；
(7) water temperature for surveying note experiment substitutes into following calculation formula (1), obtains unearthed in conjunction with the relative dimensions parameter of device
The infiltration coefficient of sample：
In formula：A-pressure-measuring pipe sectional area, unit：cm2；L-seepage paths is equal to soil sample height, unit：cm；H1-initial water
Head, unit：cm；Head when h2-termination, unit：cm；The basal area of A-soil sample, unit：cm2；T-time, unit：s；
The conversion coefficient of 2.3-ln and lg.
Further, device leak check step is also carried out between step (2) and (3).
Further, in the step (3) and/or step (4) while water filling the indoor air of pressure release and/or
Air in base passages.
Using the test method of above-mentioned infiltration experiment device, include the following steps：
(1) soil sample is prepared；
(2) it is sequentially placed seepy material, soil sample, seepy material and sample cap from low to high in opening block set, then uses
It seals flexible material to wrap seepy material, soil sample, seepy material and sample cap together with opening block set, tightens sealing
The contact position of flexible material and opening block set, sample cap, and install the infiltration experiment device；
(3) before experiment is carried out, all valves are all in closed state；Then, inlet valve four and inlet valve two are opened,
When water enter balancing gate pit flow velocity slow down gradually until stop, illustrating that balancing gate pit's leakproofness is good, next step experiment can be carried out,
Otherwise the leakproofness of check device；
(4) the first exhaust valve for opening balancing gate pit cover top, until first exhaust valve closes first row when having water spilling
Air valve, inlet valve four remain open state, and the water level of water supply installation provides enclosing for soil sample during entire experiment
Pressure；
(5) the second exhaust valve of inlet valve three and base passages is opened, pedestal is edge-on, it excludes in base passages
Air, until the bubble-free from the water that the second exhaust valve of base passages overflows, closes second exhaust valve, be then laid flat bottom
Seat；
(6) inlet valve one is opened, piezometric level is adjusted to experiment desired height, is then shut off inlet valve three, this
When water supply installation confining pressure is only provided, pressure-measuring pipe provides percolating fluid；
(7) it waits for that the water outlet of balancing gate pit's cover has water spilling, start timing and reads initial head, after time t, then read
Head at this time is taken, it is continuous to survey numeration time, so that piezometric head is gone up to needing height, then continuous survey numeration time, experiment
It terminates；
(8) water temperature for surveying note experiment substitutes into following calculation formula (1), obtains unearthed in conjunction with the relative dimensions parameter of device
The infiltration coefficient of sample：
In formula：A-pressure-measuring pipe sectional area, unit：cm2；L-seepage paths is equal to soil sample height, unit：cm；H1-initial water
Head, unit：cm；Head when h2-termination, unit：cm；The basal area of A-soil sample, unit：cm2；T-time, unit：s；
The conversion coefficient of 2.3-ln and lg.
Advantages of the present invention and effect are：(1) using flexible material is sealed to the flexible contact of sample, ring is avoided
Knife there is a possibility that gap leak to the rigid contact of sample, keep the infiltration coefficient measured more accurate；(2) preferably, it is close
The change in size of sample and the material property of each soil sample can be well adapted for by sealing flexible material；(3) balancing gate pit's cover air bleeding valve
The design of door can ensure in the smooth injection pressure room of penetrating fluid, and certain confining pressure is provided for sample, further increases rubber membrane
Laminating degree between sample；(4) design of pedestal sealing ring has fully ensured that the leakproofness connected with pedestal is covered by balancing gate pit.
The above is only the general introduction of technical solution of the present invention, in order to be better understood upon the technological means of the present invention, under
In conjunction with attached drawing, the invention will be further described in face.
Description of the drawings
Fig. 1 is novel permeation experimental rig structural schematic diagram；
Fig. 2 is the lower 0.8g/cm of 1 Frozen-thawed cycled of embodiment effect3Air bubble mix light-textured soil infiltration coefficient change curve.
Specific implementation mode
With reference to the accompanying drawings of the specification, the present invention is further illustrated.
As shown in Figure 1, a kind of infiltration experiment device, including it is internally provided with the pedestal 1 and pedestal 1 in horizontal perforative channel
It covers 2, the opening block set 21 set on 1 top of pedestal, sample cap 3, seepy material 19 and provides seepage flow for soil sample in connected balancing gate pit
Indoor 21 top of opening block set of pressure that the pressure-measuring pipe 11 of liquid and infiltration hydraulic pressure, pedestal 1 and balancing gate pit's cover 2 surround is from low to high
It is equipped with seepy material 19, soil sample 27, seepy material 19 and sample cap 3 successively, using sealing flexible material 20 by seepy material
19, soil sample 27 and sample cap 3 are wrapped up and are connected in opening block set 21, and the opening block set 21 is connected to the channel of pedestal 1, pressure
Power room covers 2 tops and is equipped with water outlet and water inlet, and sample cap 3 is equipped with and extends vertically through the perforation channels of itself, the perforation channels
It is connected with the water outlet on balancing gate pit's cover 2 by water pipe 14, is set on the pipeline between the water inlet and pressure-measuring pipe 11 in 1 channel of pedestal
There is inlet valve 1.Pressure-measuring pipe 11 carries scale plate 23.
It is connected by sealing ring 24 and bolt 25,26 between the pedestal 1 and balancing gate pit's cover 2, preferably mode is：
1 upper end of pedestal is equipped with circular groove, places a circular seal ring in circular groove, is bolted, is being pressed by two~tetra-
The corresponding position of power room cover 2 and pedestal 1 opens two~tetra- holes, and nut lower end is equipped with gasket.Sealing ring is preferably rubber ring.
The seepy material 19 is preferably permeable stone；It is preferably rubber membrane to seal flexible material 20；Water supply installation 10 is excellent
It is selected as water supply bottle.
Infiltration experiment device further includes Pneumatic quick connector 15, Pneumatic quick connector 16,17 and Pneumatic quick connector 18.
The size of 3~5 times of base passages of thickness of pedestal 1；Inner passage section configuration is preferably circular, diameter dimension
For 1~2cm, channel connection opening 21 interior bone of block set, passage end water inlet is equipped with Pneumatic quick connector 15, and channel is another
End is equipped with Pneumatic quick connector 16.
The water outlet of balancing gate pit's cover 2 forms Pneumatic quick connector 18 by being docked inside and outside two Pneumatic quick connectors, therein
Internal Pneumatic quick connector is connect with sample cap 3 by water pipe.
3 vertical channel upper end of the sample cap is equipped with Pneumatic quick connector 17, passes through water with the water outlet of balancing gate pit's cover 2
Pipe connects.
The top of balancing gate pit's cover 2 is equipped with first exhaust valve 9.The other end in 1 channel of the pedestal and 13 phase of water pipe
Even, water pipe 13 is equipped with second exhaust valve 8.
The device further includes water supply installation 10, the main water outlet pipe of water supply installation 10 first node punishment be the first branch pipe and
Second branch pipe, the first branch pipe are connected with the water inlet of balancing gate pit's cover 2, and the water inlet of balancing gate pit's cover 2 is equipped with inlet valve 27,
Second branch pipe second node punishment be third branch pipe and the 4th branch pipe, the water inlet in 1 channel of third branch pipe connect base, the 4th
Branch pipe connects the pressure-measuring pipe 11, and inlet valve 1 is located on the 4th branch pipe, and the second branch pipe is equipped with inlet valve 35, described
Water supply installation 10 lowest water level be higher than pressure-measuring pipe 11 peak level, the water supply installation 10 provide pressure-measuring pipe 11 seepage flow
The soil sample confining pressure of liquid and balancing gate pit.
Opening block set 21 is internally provided with through-hole, upper end opening and is higher by pedestal, and outside dimension is in the same size with soil sample, the bottom
1 channel of seat is connected to the through-hole of the opening block set 21.
It is tightly connected between the pedestal 1 and balancing gate pit's cover 2.
Using the test method of above-mentioned infiltration experiment device, include the following steps：
(1) soil sample 27 is prepared；
(2) it is sequentially placed seepy material 19, soil sample 27, seepy material 19 and sample cap from low to high in opening block set 21
3, then with sealing flexible material 20 together with opening block set 21 by seepy material 19, soil sample 27, seepy material 19 and sample cap 3
It wraps together, tightens the contact position for sealing flexible material 20 and opening block set 21, sample cap 3, and install the infiltration
Experimental rig；
(3) before experiment is carried out, all valves are all in closed state；Then, inlet valve 44 and inlet valve two are opened
7, when the flow velocity that water enters balancing gate pit slows down gradually until stopping, illustrating that balancing gate pit's leakproofness is good, can carry out next step examination
It tests, otherwise the leakproofness of check device；
(4) the first exhaust valve 9 for covering 2 tops in balancing gate pit is opened, until first exhaust valve 9 closes first when having water spilling
Drain tap 9, inlet valve 44 and inlet valve 27 remain open state, water supply installation 10 during entire experiment
Water level provides the confining pressure of soil sample 27；
(5) the second exhaust valve 8 of inlet valve 35 and 1 channel of pedestal is opened, pedestal 1 is edge-on, it is logical to exclude pedestal 1
Air in road, until the bubble-free from the water that the second exhaust valve 8 in 1 channel of pedestal overflows, closes second exhaust valve 8,
Then it is laid flat pedestal 1；
(6) inlet valve 1 is opened, 11 water level of pressure-measuring pipe is adjusted to experiment desired height, is then shut off inlet valve three
5,10 offer confining pressures of water supply installation at this time, pressure-measuring pipe 11 provides percolating fluid；
(7) it waits for that the water outlet of balancing gate pit's cover 2 has water spilling, starts timing and read initial head, after time t, then
Read head at this time, it is continuous to survey numeration time, so that 11 head of pressure-measuring pipe is gone up to needing height, then it is continuous survey numeration time,
Experiment terminates；
(8) water temperature for surveying note experiment substitutes into following calculation formula (1), obtains unearthed in conjunction with the relative dimensions parameter of device
The infiltration coefficient of sample, wherein
In formula：A-pressure-measuring pipe sectional area, unit：cm2；L-seepage paths is equal to soil sample height, unit：cm；H1-initial water
Head, unit：cm；Head when h2-termination, unit：cm；The basal area of A-soil sample, unit：cm2；T-time, unit：s；
The conversion coefficient of 2.3-ln and lg.
Embodiment 1
Air bubble mix light-textured soil sample is used below, and experimental test has been carried out to a kind of permeability test device of the present invention,
Concrete operation step and result are as follows：
1. preparing 10 pieces of a diameter of 61.8mm, the density of a height of 40mm is 0.8g/cm3Air bubble mix light-textured soil sample 27,
It is divided into 5 groups, every group of two Duplicate Samples, sample is poured by the mixing of sand, cement, water and bubble in being formed in cutting ring, in sky
Demoulded after standing 24 hours in gas, then conserve 28 days in constant-temp. and-moisture maintenance, then carry out respectively Frozen-thawed cycled 0,1,
3,5,10 times, after vacuumizing saturation, its infiltration coefficient is surveyed using novel flexible wall permeability apparatus；
2. rubber membrane is hunted leak, rubber membrane is wrapped into sample 27 by suction tube, two pieces of permeable stones are soaked in advance, in pedestal 1
Block set 21 on be sequentially placed permeable stone, sample 27, permeable stone, sample cap 3 from low to high, finally use rubber membrane together with block set 21
It is wrapped together, rubber band is used in combination to tighten the contact position of rubber membrane and block set 21, sample cap 3；
3. 3 connector 17 of sample cap is covered 2 water outlets with balancing gate pit with water pipe 14 to connect, alignment bolt 24,25 positions will press
Power room cover 2 is connected on pedestal 1, tightens bolt 24,25；
Before 4. experiment is carried out, all valves are all in closed state.Inlet valve 44 is first opened, balancing gate pit's cover 2 is opened
Inlet valve 27, when the flow velocity that water enters balancing gate pit slows down gradually until stopping, illustrating that balancing gate pit's leakproofness is good, Ke Yijin
It goes in next step, otherwise the leakproofness of check device；
5. open first exhaust valve 9, until first exhaust valve 9 closes first exhaust valve 9 when having water spilling, pay attention into
Penstock 44 and inlet valve 27 remain open state, and the water level of water supply bottle provides sample 27 during entire experiment
Confining pressure.
6. inlet valve 35 and second exhaust valve 8 are opened, pedestal 1 is edge-on, the air in channel 22 is excluded, until overflowing
Bubble-free in water outlet closes second exhaust valve 8, is laid flat pedestal 1；
7. opening inlet valve 1,11 water level of pressure-measuring pipe is adjusted to experiment desired height, is then shut off inlet valve 35,
10 offer confining pressures of water supply bottle at this time, pressure-measuring pipe 11 provide percolating fluid, and percolating fluid herein is common pure water；
The water outlet of the balancing gate pits ⑧Dai cover 2 has water spilling, starts timing and reads initial head, after time t, then reads
Head at this time is taken, this is continuous to survey note 2~3 times, and 11 head of pressure-measuring pipe is then made to go up to needing height, then continuous surveys numeration
It is secondary, need 6 times or more, experiment terminates；
9. the water temperature for surveying note experiment substitutes into following calculation formula of existing specification in conjunction with the relative dimensions parameter of device
(1), the infiltration coefficient for obtaining air bubble mix light-textured soil sample observes its infiltration coefficient after Frozen-thawed cycled 0,1,3,5,10 times
Changing rule (as shown in Figure 2), wherein
In formula：A-pressure-measuring pipe sectional area, unit：cm2；L-seepage paths is equal to soil sample height, unit：cm；H1-initial water
Head, unit：cm；Head when h2-termination, unit：cm；The basal area of A-soil sample, unit：cm2；T-time, unit：s；
The conversion coefficient of 2.3-ln and lg.
The basic principles and main features and advantage of the present invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the originals of the present invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (10)
1. a kind of infiltration experiment device, which is characterized in that pedestal (1) and pedestal including being internally provided with horizontal perforative channel
(1) connected balancing gate pit covers (2), the opening block set (21) for being set to pedestal (1) top, sample cap (3), seepy material (19), is
Soil sample provides percolating fluid and permeates the pressure-measuring pipe (11) of hydraulic pressure；In pedestal (1) and balancing gate pit cover (2) pressure for surrounding is indoor opens
It is equipped with seepy material (19), soil sample, seepy material (19) and sample cap (3) above muzzle seat (21) successively from the bottom to top, uses
Flexible material is sealed to wrap up seepy material (19), soil sample and sample cap (3) and be connected in opening block set (21)；It is described to open
Muzzle seat (21) is connected to the channel of pedestal (1), and balancing gate pit covers (2) top and is equipped with water outlet and water inlet, and sample cap (3) is equipped with
The perforation channels of itself are extended vertically through, the perforation channels are connected by water pipe (14) with the water outlet on balancing gate pit's cover (2), bottom
Pipeline between the water inlet and pressure-measuring pipe (11) in seat (1) channel is equipped with inlet valve one (6).
2. infiltration experiment device according to claim 1, which is characterized in that the top of balancing gate pit cover (2) is equipped with the
One drain tap (9).
3. infiltration experiment device according to claim 1, which is characterized in that the other end in pedestal (1) channel is equipped with
Second exhaust valve (8).
4. according to claim 1-3 any one of them infiltration experiment devices, which is characterized in that the device further includes water supply installation
(10), the main water outlet pipe of water supply installation (10) is the first branch pipe and the second branch pipe, the first branch pipe and pressure in first node punishment
The water inlet that (2) are covered in room is connected, and the water inlet that (2) are covered by balancing gate pit is equipped with inlet valve two (7), and the second branch pipe is in second node
Punishment is third branch pipe and the 4th branch pipe, the water inlet in third branch pipe connect base (1) channel, the 4th branch pipe connection pressure measurement
It manages (11), inlet valve one (6) is located on the 4th branch pipe, and the second branch pipe is equipped with inlet valve three (5), the water supply installation
(10) lowest water level is higher than the peak level of pressure-measuring pipe (11), and the water supply installation (10) provides the percolating fluid of pressure-measuring pipe (11)
With the soil sample confining pressure of balancing gate pit.
5. infiltration experiment device according to claim 1, which is characterized in that opening block set (21) is internally provided with through-hole, on
End opening and be higher by pedestal, outside dimension is in the same size with soil sample, pedestal (1) the channel connection opening block set (21) it is logical
Hole.
6. infiltration experiment device according to claim 1, which is characterized in that the pedestal (1) and balancing gate pit's cover (2) it
Between the sealed connection mode that is tightly connected be preferably between pedestal (1) and balancing gate pit's cover (2) by sealing ring (24) and bolt company
It connects.
7. using the test method of infiltration experiment device described in claim 1, which is characterized in that include the following steps：
(1) soil sample (27) is prepared；
(2) seepy material (19), soil sample (27), seepy material (19) and examination are sequentially placed from low to high in opening block set (21)
Sample cap (3), then with sealing flexible material (20) together with opening block set (21) by seepy material (19), soil sample (27), permeable
Material (19) and sample cap (3) wrap together, tighten the flexible material (20) of sealing and opening block set (21), sample cap (3)
Contact position, and install the infiltration experiment device；
(3) it is filled to full of balancing gate pit by the water inlet on balancing gate pit's cover (2)；
(4) by the water inlet water filling in pedestal (1) channel until fill channel and opening block set inner via hole；
(5) inlet valve one (6) is opened, pressure-measuring pipe (11) water level is adjusted to experiment desired height, the water level of water supply installation (10)
Confining pressure is provided for soil sample, pressure-measuring pipe (11) provides percolating fluid；
(6) it waits for that the water outlet of balancing gate pit's cover (2) has water spilling, start timing and reads initial head, after time t, then read
Take head at this time, it is continuous to survey numeration time, so that pressure-measuring pipe (11) head is gone up to needing height, then it is continuous survey numeration time,
Experiment terminates；
(7) water temperature for surveying note experiment substitutes into following calculation formula (1), obtains soil sample in conjunction with the relative dimensions parameter of device
Coefficient of permeability KT：
In formula：A-pressure-measuring pipe sectional area, unit：cm2；L-seepage paths is equal to soil sample height, unit：cm；h1- initial head, it is single
Position：cm；h2Head when-termination, unit：cm；The basal area of A-soil sample, unit：cm2；T-time, unit：s；2.3-ln and
The conversion coefficient of lg.
8. test method according to claim 7, which is characterized in that also carry out device sealing between step (2) and (3)
Property checking step.
9. test method according to claim 7, which is characterized in that in water filling in the step (3) and/or step (4)
While the indoor air of pressure release and/or pedestal (1) channel in air.
10. using the test method of infiltration experiment device as claimed in claim 4, which is characterized in that include the following steps：
(1) soil sample (27) is prepared；
(2) seepy material (19), soil sample (27), seepy material (19) and examination are sequentially placed from low to high in opening block set (21)
Sample cap (3), then with sealing flexible material (20) together with opening block set (21) by seepy material (19), soil sample (27), permeable
Material (19) and sample cap (3) wrap together, tighten the flexible material (20) of sealing and opening block set (21), sample cap (3)
Contact position, and install the infiltration experiment device；
(3) before experiment is carried out, all valves are all in closed state；Then, inlet valve four (4) and inlet valve two are opened
(7), when water enter balancing gate pit flow velocity slow down gradually until stop, illustrating that balancing gate pit's leakproofness is good, can carry out in next step
It tests, otherwise the leakproofness of check device；
(4) the first exhaust valve (9) on balancing gate pit cover (2) top is opened, until first exhaust valve (9) closes the when having water spilling
One drain tap (9), inlet valve four (4) and inlet valve two (7) remain open state, supply water during entire experiment
The water level of device (10) provides the confining pressure of soil sample (27)；
(5) the second exhaust valve (8) in inlet valve three (5) and pedestal (1) channel is opened, pedestal (1) is edge-on, exclude pedestal
(1) air in channel, until the bubble-free from the water that the second exhaust valve (8) in pedestal (1) channel overflows, closes second row
Air valve (8) is then laid flat pedestal (1)；
(6) inlet valve one (6) is opened, pressure-measuring pipe (11) water level is adjusted to experiment desired height, is then shut off inlet valve three
(5), water supply installation (10) at this time only provides confining pressure, and pressure-measuring pipe (11) provides percolating fluid；
(7) it waits for that the water outlet of balancing gate pit's cover (2) has water spilling, start timing and reads initial head, after time t, then read
Take head at this time, it is continuous to survey numeration time, so that pressure-measuring pipe (11) head is gone up to needing height, then it is continuous survey numeration time,
Experiment terminates；
(8) water temperature for surveying note experiment substitutes into following calculation formula (1), obtains soil sample in conjunction with the relative dimensions parameter of device
Infiltration coefficient：
In formula：A-pressure-measuring pipe sectional area, unit：cm2；L-seepage paths is equal to soil sample height, unit：cm；The initial heads of h1-,
Unit：cm；Head when h2-termination, unit：cm；The basal area of A-soil sample, unit：cm2；T-time, unit：s；2.3-ln
With the conversion coefficient of lg.
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| CN110082178A (en) * | 2019-04-29 | 2019-08-02 | 长安大学 | A kind of earthen foundation environment in-situ condition sample curing means and method |
| CN110108620A (en) * | 2019-05-29 | 2019-08-09 | 天津大学 | A kind of self-saturation automatic collection lysimeter |
| CN110530775A (en) * | 2019-09-23 | 2019-12-03 | 中南大学 | Respectively to the soil body gas-liquid infiltration experiment system of isobaric dry and wet chemical cycle |
| CN110595977A (en) * | 2019-08-19 | 2019-12-20 | 太原理工大学 | Test device and test method for testing permeability of sandy soil by gas-water coupling pressure |
| CN110736692A (en) * | 2019-11-04 | 2020-01-31 | 三峡大学 | automatic device and method for measuring permeability coefficient of soil body |
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| CN110082178A (en) * | 2019-04-29 | 2019-08-02 | 长安大学 | A kind of earthen foundation environment in-situ condition sample curing means and method |
| CN110108620A (en) * | 2019-05-29 | 2019-08-09 | 天津大学 | A kind of self-saturation automatic collection lysimeter |
| CN110595977A (en) * | 2019-08-19 | 2019-12-20 | 太原理工大学 | Test device and test method for testing permeability of sandy soil by gas-water coupling pressure |
| CN110530775A (en) * | 2019-09-23 | 2019-12-03 | 中南大学 | Respectively to the soil body gas-liquid infiltration experiment system of isobaric dry and wet chemical cycle |
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