CN108872042A - Sand level, vertical infiltration coefficient simultaneous determination apparatus and its test method - Google Patents
Sand level, vertical infiltration coefficient simultaneous determination apparatus and its test method Download PDFInfo
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- CN108872042A CN108872042A CN201810665307.1A CN201810665307A CN108872042A CN 108872042 A CN108872042 A CN 108872042A CN 201810665307 A CN201810665307 A CN 201810665307A CN 108872042 A CN108872042 A CN 108872042A
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- 230000008595 infiltration Effects 0.000 title claims abstract description 42
- 238000001764 infiltration Methods 0.000 title claims abstract description 42
- 239000004576 sand Substances 0.000 title claims abstract description 41
- 238000010998 test method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 108
- 239000002689 soil Substances 0.000 claims abstract description 7
- 239000011148 porous material Substances 0.000 claims description 24
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000012360 testing method Methods 0.000 claims description 15
- 230000003204 osmotic effect Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- 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
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- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
It is horizontal that the present invention relates to a kind of sands, vertical infiltration coefficient simultaneous determination apparatus and its test method, including the sample container for holding sand, the upper end of the sample container is connected with flood pattern, the side wall of sample container is arranged at intervals with the side wall drainage hole of several circumferentially spaced settings of circle from top to bottom, it is equipped with outside sample container, the transparent outer cylinder that lower end is tightly connected with sample container respectively, the lower part of the transparent outer cylinder is provided with the first drainpipe towards flood pattern, horizontal direction data collecting instrument is provided on first drainpipe, the sample container lower part is provided with porous plate, the bottom of sample container the second drainpipe funnel-shaped being provided with towards flood pattern, vertical data collecting instrument is provided on second drainpipe.The device can really reflect water in soil in the seepage flow in horizontal and vertical direction, while test method is easy.
Description
Technical field
The present invention relates to a kind of sands horizontal, vertical infiltration coefficient simultaneous determination apparatus and its test method.
Background technique
The phenomenon that water flows in sand soil body hole referred to as seepage flow, due to the effect of head difference or hydraulic gradient, so that
Seepage flow occurs in the soil body for water, and in Practical Project, seepage flow is simultaneous, and mutual shadow with vertical direction in the horizontal direction
It rings.Current seepage flow test device, the device of predominantly independent measurement the sand soil body vertical infiltration coefficient and horizontal-hole blasting,
There are no the test apparatuses of measurement simultaneously.
Summary of the invention
The purpose of the present invention is to provide a kind of sands horizontal, vertical infiltration coefficient simultaneous determination apparatus and its test
Method, the device can really reflect water in soil in the seepage flow in horizontal and vertical direction, while test method is easy.
Technical program of the present invention lies in：A kind of sand is horizontal, vertical infiltration coefficient simultaneous determination apparatus, including with
Be connected in the upper end of the sample container for holding sand, the sample container with flood pattern, the side wall of sample container from upper and
Under be arranged at intervals with the side wall drainage holes of the circumferentially spaced settings of several circles, be equipped with outside sample container upper and lower end respectively with examination
The transparent outer cylinder that sample container is tightly connected, the lower part of the transparent outer cylinder is provided with the first drainpipe towards flood pattern, institute
It states and is provided with horizontal direction data collecting instrument on the first drainpipe, the sample container lower part is provided with porous plate, sample container
Bottom the second drainpipe funnel-shaped being provided with towards flood pattern is provided with vertical data acquisition on second drainpipe
Instrument.
Further, the flood pattern includes water tank, is provided on the water tank and seals with sample container upper end
The water injection pipe of connection is provided with intelligent water pump on the water injection pipe.
Further, the sample container includes the sample bucket being set in supporting table, the upper end setting of the sample bucket
There is the top cover with its releasable connection and sealed processing, the side wall of sample bucket is circumferentially spaced to be provided with and the fixed company of transparent outer cylinder
The fixedly connected part connect is laid with one layer of filter screen between sample bucket inner wall and sand.
Further, annular is respectively arranged on the lateral wall of the sample bucket and on the downside of every circle side wall drainage hole
Inclined-plane is drained, has hole at the center of sample bucket and close to side-walls are symmetrically embedding from top to bottom in the sand of sample bucket
Water pressure gauge.
Further, first drainpipe is upper is provided with first between horizontal direction data collecting instrument and transparent outer cylinder
Water valve, second drainpipe is upper to be provided with the second water valve between vertical data collecting instrument and sample container.
Further, the lower end of the transparent outer cylinder is obliquely installed with the drainage channel that sample container cooperatively forms, described
The least significant end of drainage channel is connected with the first drainpipe.
Further, the transparent outer cylinder is made of transparent organic glass.
Further, the side wall drainage hole is 3 mm of height, the rectangular drainage hole of 10 mm of width, and along sample container
Circumferentially-spaced 5 mm be evenly arranged, it is neighbouring two circle side wall drainage hole spacing be 3 mm；Bottom on the porous plate
Drainage hole aperture is 2mm.
A kind of test method of horizontal, the vertical infiltration coefficient simultaneous determination apparatus of sand, includes the following steps：
（1）Top cover is opened, is packed into test specimen tube in one layer of filter screen of sample bucket disposed inboard, and by sand to be measured, while along sample
Symmetrically embedding 5 pore pressure gauges are distinguished from the bottom to top close to side-walls in bucket center line and same level；
（2）Top cover simultaneously completes fixed, sealing；
（3）Intelligent water pump is opened, initial water pressure is set, is filled the water by water injection pipe into sample bucket, open simultaneously the first, second water
Valve；
（4）To horizontal direction data collecting instrument, the horizontal direction seepage discharge in vertical data collecting instrument the surveyed unit timeq hWith it is perpendicular
To seepage dischargeq vAfter stabilization, horizontal direction seepage discharge of the recording level into the unit time that data collecting instrument is surveyed respectivelyq hWith
The water pressure of horizontal direction drainpipe outflow waterp wh, and the vertical seepage discharge in unit time for being surveyed of vertical data collecting instrumentq v；The pore water pressure count value being embedded in sand is recorded simultaneously, takes the average value of had pore water pressure at center respectively
With the average value of all pore pressure gauges close to sidewall symmetry arrangement；
（5）Acquisition data are input to computer, and horizontal direction and vertical seepage flow in sand while horizontal direction when occurring is calculated
Infiltration coefficient and vertical infiltration coefficient：
,,
Wherein in formula：k hHorizontal direction infiltration coefficient,k vVertical infiltration coefficient,q hHorizontal direction seepage discharge,q vVertical seepage flow
Amount,LSand specimen height,RSand radius of specimen,pWater injection pipe hydraulic pressure,p whHorizontal direction drainpipe hydraulic pressure, γwThe weight of water
Degree,p w1All pore pressure gauge average values on test specimen tube center line are embedded in,p w2Symmetrically it is embedded in test specimen tube side wall place
There is pore pressure gauge average value；
（6）When measuring horizontal osmotic coefficient, the second water valve is closed, repeats step（1）~（3）, acquisition units time water percolating capacityq hWith sand pore water pressure value, step is brought into（5）The calculation formula of middle horizontal osmotic coefficient is calculated；
When measuring vertical infiltration coefficient, the first water valve is closed, repeats step（1）~（3）, analytical unit time water percolating capacityq h
With the water pressure of horizontal direction drainpipe outflow waterp wh, bring step into（5）In the calculation formula of vertical infiltration coefficient calculate.
Compared with prior art, the present invention has the following advantages that：The instrument can really reflect in soil water horizontal and
The seepage flow of vertical direction can measure infiltration coefficient horizontal and vertical when seepage flow occurs simultaneously, can also distinguish testing level, erect
To infiltration coefficient, meet engineering and teaching needs.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is cross-sectional view of the invention；
Fig. 3 is sample container sectional view of the invention；
Fig. 4 is the A-A cross-sectional view of Fig. 2 of the invention；
Fig. 5 is the porous plate top view of test specimen tube bottom of the invention；
In figure：1- water tank, the transparent outer cylinder of 2-, 3- intelligent water pump, 4- horizontal direction data collecting instrument, the first water valve of 5-, 6- are vertical
Data collecting instrument, the second water valve of 7-, 8- supporting table, 9- pore pressure gauge, 10- porous plate, 11- top cover, 12- bolt, the bottom 13-
Portion's drainage hole, 14- side wall drainage hole, 15- annular draining inclined-plane, 16- water injection pipe, the first drainpipe of 17-, the second drainpipe of 18-,
19- filter screen, 20- sample container, 21- fixedly connected part.
Specific embodiment
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and cooperate attached drawing, make detailed
It is carefully described as follows, but the present invention is not limited thereto.
Referring to figs. 1 to Fig. 5
A kind of sand is horizontal, vertical infiltration coefficient simultaneous determination apparatus, described including the sample container for holding sand
The upper end of sample container is connected with flood pattern, between the side wall of sample container is arranged at intervals with several circles circumferentially from top to bottom
Every the side wall drainage hole 14 of setting, the side wall drainage hole is 3 mm of height, the rectangular drainage hole of 10 mm of width, and along sample
Circumferentially-spaced 5 mm of container is evenly arranged, and the spacing of neighbouring two circles side wall drainage hole is 3 mm；Sample container is nested with outside
The transparent outer cylinder 2 for having upper and lower end to be tightly connected respectively with sample container, the lower part of the transparent outer cylinder, which is provided with, leads to water filling system
First drainpipe 17 of system is provided with horizontal direction data collecting instrument 4, the sample container lower part setting on first drainpipe
There are porous plate 10, the bottom of sample container the second drainpipe 18 funnel-shaped being provided with towards flood pattern, the second row
Vertical data collecting instrument 6 is provided on water pipe.
In the present embodiment, the flood pattern includes water tank 1, is provided on the water tank close with sample container upper end
The water injection pipe 16 of connection is sealed, is provided with intelligent water pump 3 on the water injection pipe, the intelligent water pump 3, which can be set in water injection pipe 16, presses
Force value is drawn water from water tank 1 by intelligent water pump 3 and injects sample bucket 20, and injection water pressure invariableness is kept, i.e. head is constant.
In the present embodiment, the sample container includes being set in supporting table 8 and inner cavity diameter for 100 mm, height
The sample bucket 20 of 100 mm.By the way that sample bucket to be set in supporting table, sample bucket is set to be slightly above ground, convenient at sample bucket bottom
Portion disposes drainpipe.The upper end of the sample bucket is provided with the top cover 11 with its releasable connection and sealed processing, and top cover passes through
Fixed with bolt 12, the side wall of sample bucket is circumferentially spaced to be provided with 4 fixedly connected parts being fixedly connected with transparent outer cylinder 21,
Test specimen tube deformation in the presence of hydraulic pressure is prevented, one layer of filter screen 19 is laid between sample bucket inner wall and sand.Water injection pipe 16
Encapsulation process is connect and carried out with top cover 11, sealing strip is set between top cover 11 and sample bucket, prevents from seeping water.
In the present embodiment, ring is respectively arranged on the lateral wall of the sample bucket and on the downside of every circle side wall drainage hole
Shape drains inclined-plane 15, and the water of horizontal direction exudation is flowed out from side wall drainage hole in sand, drains inclined-plane 15 by ring and is drained to
Bright outer cylinder 2 finally converges into the cylinder bottom of transparent outer cylinder.The drainage that the lower end of the transparent outer cylinder and sample container cooperatively form is logical
Road is obliquely installed, and the least significant end of the drainage channel is connected with the first drainpipe, to collect the water that horizontal direction seepage flow goes out.
In the present embodiment, in the sand of sample bucket from top to bottom at the center of sample bucket and close to side-walls symmetrically
It is embedding to have pore pressure gauge 9, head loss when horizontal direction seepage flow occurs to measure.
In the present embodiment, first drainpipe is upper to be provided between horizontal direction data collecting instrument and transparent outer cylinder
One water valve, second drainpipe is upper to be provided with the second water valve between vertical data collecting instrument and sample container.
In the present embodiment, the transparent outer cylinder is made of transparent organic glass, the bottom drain holes hole on the porous plate
Diameter is 2mm, pass through the water of vertical seepage flow, and is vertically permeated by the way that the bottom of sample container is funnel-shaped to collect
Water.
Working principle：The invention device uses intelligent water pump to control initial head as constant, and draws respectively horizontal and perpendicular
Histogram to water, pass through the horizontal direction seepage discharge in the analytical unit timeq hWith vertical seepage dischargeq v, while measuring outflow in pipe
The water pressure of waterp whWithp wv.The first, second water valve is arranged in horizontal and vertical seepage channel exit, controls effluent switch.It is horizontal
The water gone out with vertical direction seepage flow is discharged into water tank, then is injected in sample container by intelligent water pump, and circulation is formed.Horizontal direction
The data that data collecting instrument 4 and vertical data collecting instrument 6 acquire are output to computer, and horizontal direction and vertical is obtained by calculation
The infiltration coefficient in direction.
A kind of test method of horizontal, the vertical infiltration coefficient simultaneous determination apparatus of sand, includes the following steps：
（1）Open top cover prevents sand from flowing from drainage hole in flow event in one layer of filter screen of sample bucket disposed inboard
It loses, filter screen should be replaced before test every time.And sand to be measured is packed into test specimen tube, while along sample bucket center line and same water
Symmetrically embedding 5 pore pressure gauges are distinguished from the bottom to top close to side-walls in plane；
（2）Top cover simultaneously completes fixed, sealing, fixed with bolt 12, checks top seal；
（3）Intelligent water pump is opened, initial water pressure is set, is filled the water by water injection pipe into sample bucket, open simultaneously the first, second water
Valve；
（4）To horizontal direction data collecting instrument, the horizontal direction seepage discharge in vertical data collecting instrument the surveyed unit timeq hWith it is perpendicular
To seepage dischargeq vAfter stabilization, recording level is surveyed to data collecting instrument 4 respectively the horizontal direction seepage discharge in unit timeq hWith
The water pressure of horizontal direction drainpipe outflow waterp wh, and the vertical seepage flow in unit time for being surveyed of vertical data collecting instrument 6
Amountq v；The pore water pressure count value being embedded in sand is recorded simultaneously, takes being averaged for had pore water pressure at center respectively
The average value of value and all pore pressure gauges close to sidewall symmetry arrangement；
（5）Acquisition data are input to computer, and horizontal direction and vertical seepage flow in sand while horizontal direction when occurring is calculated
Infiltration coefficient and vertical infiltration coefficient：
,,
Wherein in formula：k hHorizontal direction infiltration coefficient,k vVertical infiltration coefficient,q hHorizontal direction seepage discharge,q vVertical seepage flow
Amount,LSand specimen height,RSand radius of specimen,pWater injection pipe hydraulic pressure,p whHorizontal direction drainpipe hydraulic pressure, γwThe weight of water
Degree,p w1All pore pressure gauge average values on test specimen tube center line are embedded in,p w2Symmetrically it is embedded in test specimen tube side wall place
There is pore pressure gauge average value；
（6）Horizontal osmotic coefficient and vertical infiltration coefficient can also individually be measured；When measuring horizontal osmotic coefficient, the is closed
Two water valves repeat step（1）~（3）, acquisition units time water percolating capacityq hWith sand pore water pressure value, step is brought into（5）In
The calculation formula of horizontal osmotic coefficient is calculated；
When measuring vertical infiltration coefficient, the first water valve is closed, repeats step（1）~（3）, analytical unit time water percolating capacityq h
With the water pressure of horizontal direction drainpipe outflow waterp wh, bring step into（5）In the calculation formula of vertical infiltration coefficient calculate.
The foregoing is merely presently preferred embodiments of the present invention, for the ordinary skill in the art, according to this hair
Bright introduction designs various forms of sands levels, vertical infiltration coefficient simultaneous determination apparatus and its test method simultaneously
Creative labor is not needed, it is all according to scope of the present invention patent institute without departing from the principles and spirit of the present invention
Equivalent change, modification, the replacement and variant made, are all covered by the present invention.
Claims (9)
1. a kind of sand is horizontal, vertical infiltration coefficient simultaneous determination apparatus, including the sample container for holding sand,
It is characterized in that, the upper end of the sample container is connected with flood pattern, and the side wall of sample container is arranged at intervals with from top to bottom
The side wall drainage hole of several circumferentially spaced settings of circle, sample container, which is equipped with upper and lower end outside and seals respectively with sample container, to be connected
The transparent outer cylinder connect, the lower part of the transparent outer cylinder are provided with the first drainpipe towards flood pattern, first drainpipe
On be provided with horizontal direction data collecting instrument, the sample container lower part is provided with porous plate, and the bottom of sample container is funnel-shaped
It is provided with the second drainpipe towards flood pattern, is provided with vertical data collecting instrument on second drainpipe.
2. sand level according to claim 1, vertical infiltration coefficient simultaneous determination apparatus, which is characterized in that institute
Stating flood pattern includes water tank, and the water injection pipe being tightly connected with sample container upper end, the note are provided on the water tank
Intelligent water pump is provided on water pipe.
3. sand level according to claim 2, vertical infiltration coefficient simultaneous determination apparatus, which is characterized in that institute
Stating sample container includes the sample bucket being set in supporting table, and the upper end of the sample bucket is provided with its releasable connection and through close
The top cover of processing is sealed, the side wall of sample bucket is circumferentially spaced to be provided with the fixedly connected part being fixedly connected with transparent outer cylinder, sample
One layer of filter screen is laid between bucket inner wall and sand.
4. sand level according to claim 3, vertical infiltration coefficient simultaneous determination apparatus, which is characterized in that institute
It states on the lateral wall of sample bucket and is located on the downside of every circle side wall drainage hole and be respectively arranged with annular draining inclined-plane, the sand of sample bucket
There is pore pressure gauge at the center of sample bucket and close to side-walls are symmetrically embedding from top to bottom in soil.
5. sand level according to claim 4, vertical infiltration coefficient simultaneous determination apparatus, which is characterized in that institute
State that the first drainpipe is upper to be provided with the first water valve, second drainpipe between horizontal direction data collecting instrument and transparent outer cylinder
It is upper that the second water valve is provided between vertical data collecting instrument and sample container.
6. sand level according to claim 1, vertical infiltration coefficient simultaneous determination apparatus, which is characterized in that institute
It states the lower end of transparent outer cylinder and drainage channel that sample container cooperatively forms is obliquely installed, the least significant end of the drainage channel and the
One drainpipe is connected.
7. according to claim 1, the level of sand described in 2,3,4,5 or 6, vertical infiltration coefficient simultaneous determination apparatus,
It is characterized in that, the transparent outer cylinder is made of transparent organic glass.
8. according to claim 1, the level of sand described in 2,3,4,5 or 6, vertical infiltration coefficient simultaneous determination apparatus,
It is characterized in that, the side wall drainage hole is 3 mm of height, the rectangular drainage hole of 10 mm of width, and between the circumferential direction of sample container
It is evenly arranged every 5 mm, the spacing of neighbouring two circles side wall drainage hole is 3 mm；Bottom drain holes hole on the porous plate
Diameter is 2mm.
9. a kind of test method using horizontal, the vertical infiltration coefficient simultaneous determination apparatus of sand described in claim 5,
It is characterized by comprising the following steps：
（1）Top cover is opened, is packed into test specimen tube in one layer of filter screen of sample bucket disposed inboard, and by sand to be measured, while along sample
Symmetrically embedding 5 pore pressure gauges are distinguished from the bottom to top close to side-walls in bucket center line and same level；
（2）Top cover simultaneously completes fixed, sealing；
（3）Intelligent water pump is opened, initial water pressure is set, is filled the water by water injection pipe into sample bucket, open simultaneously the first, second water
Valve；
（4）To horizontal direction data collecting instrument, the horizontal direction seepage discharge in vertical data collecting instrument the surveyed unit timeq hWith it is vertical
Seepage dischargeq vAfter stabilization, horizontal direction seepage discharge of the recording level into the unit time that data collecting instrument is surveyed respectivelyq hAnd water
Square to drainpipe outflow water water pressurep wh, and the vertical seepage discharge in unit time for being surveyed of vertical data collecting instrumentq v；The pore water pressure count value being embedded in sand is recorded simultaneously, takes the average value of had pore water pressure at center respectively
With the average value of all pore pressure gauges close to sidewall symmetry arrangement；
（5）Acquisition data are input to computer, and horizontal direction and vertical seepage flow in sand while horizontal direction when occurring is calculated
Infiltration coefficient and vertical infiltration coefficient：
,,
Wherein in formula：k hHorizontal direction infiltration coefficient,k vVertical infiltration coefficient,q hHorizontal direction seepage discharge,q vVertical seepage discharge,LSand specimen height,RSand radius of specimen,pWater injection pipe hydraulic pressure,p whHorizontal direction drainpipe hydraulic pressure, γwThe severe of water,p w1All pore pressure gauge average values on test specimen tube center line are embedded in,p w2It is all to be symmetrically embedded in test specimen tube side-walls
Pore pressure gauge average value；
（6）When measuring horizontal osmotic coefficient, the second water valve is closed, repeats step（1）~（3）, acquisition units time water percolating capacityq hWith sand pore water pressure value, step is brought into（5）The calculation formula of middle horizontal osmotic coefficient is calculated；
When measuring vertical infiltration coefficient, the first water valve is closed, repeats step（1）~（3）, analytical unit time water percolating capacityq hWith
The water pressure of horizontal direction drainpipe outflow waterp wh, bring step into（5）In the calculation formula of vertical infiltration coefficient calculate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810665307.1A CN108872042A (en) | 2018-06-26 | 2018-06-26 | Sand level, vertical infiltration coefficient simultaneous determination apparatus and its test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810665307.1A CN108872042A (en) | 2018-06-26 | 2018-06-26 | Sand level, vertical infiltration coefficient simultaneous determination apparatus and its test method |
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|---|---|
| CN108872042A true CN108872042A (en) | 2018-11-23 |
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|---|---|---|---|
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| CN109723025A (en) * | 2018-12-28 | 2019-05-07 | 青岛理工大学 | A kind of underground structure boundary seepage flow test device and its application method |
| CN110221040A (en) * | 2019-05-27 | 2019-09-10 | 中国地震局工程力学研究所 | A kind of equipment for the detection of sand saturation degree |
| CN111693436A (en) * | 2020-06-28 | 2020-09-22 | 浙江工业大学 | Coarse sandy soil horizontal seepage model box and test method thereof |
| CN114354434A (en) * | 2021-12-28 | 2022-04-15 | 中国路桥工程有限责任公司 | Roadbed material dry-wet cycle test device and test method |
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| CN110221040A (en) * | 2019-05-27 | 2019-09-10 | 中国地震局工程力学研究所 | A kind of equipment for the detection of sand saturation degree |
| CN111693436A (en) * | 2020-06-28 | 2020-09-22 | 浙江工业大学 | Coarse sandy soil horizontal seepage model box and test method thereof |
| CN114354434A (en) * | 2021-12-28 | 2022-04-15 | 中国路桥工程有限责任公司 | Roadbed material dry-wet cycle test device and test method |
| CN114354434B (en) * | 2021-12-28 | 2023-11-21 | 中国路桥工程有限责任公司 | Roadbed material dry-wet cycle test device and test method |
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Application publication date: 20181123 |