CN107677586A - A kind of new geotextile silting experiment instrument - Google Patents
A kind of new geotextile silting experiment instrument Download PDFInfo
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- CN107677586A CN107677586A CN201711154520.8A CN201711154520A CN107677586A CN 107677586 A CN107677586 A CN 107677586A CN 201711154520 A CN201711154520 A CN 201711154520A CN 107677586 A CN107677586 A CN 107677586A
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- 239000004746 geotextile Substances 0.000 title claims abstract description 87
- 238000002474 experimental method Methods 0.000 title claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 97
- 238000005406 washing Methods 0.000 claims abstract description 16
- 229920001296 polysiloxane Polymers 0.000 claims description 20
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 210000003739 neck Anatomy 0.000 claims description 11
- 239000004575 stone Substances 0.000 claims description 8
- 238000009530 blood pressure measurement Methods 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 5
- 239000002689 soil Substances 0.000 description 27
- 238000012360 testing method Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 238000011010 flushing procedure Methods 0.000 description 8
- 230000008595 infiltration Effects 0.000 description 8
- 238000001764 infiltration Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000035515 penetration Effects 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 206010003504 Aspiration Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention relates to geotextile materials detecting instrument technical field, discloses a kind of new geotextile silting experiment instrument, including：Silting cylinder main body, head control device, pressure tester, vacuum suction saturation system and obstetric pressurizing washing device；The silting cylinder main body includes：Top cover, upper cylinder, middle cylinder, lower cylinder and base, filter paper or filter screen are provided between upper cylinder and middle cylinder, geotextile is provided between middle cylinder and lower cylinder, the top cover is provided with water inlet and exhaust outlet, base is provided with discharge outlet, upper cylinder is connected with vacuum suction saturation system, multiple radial direction pressure taps are equipped with the middle cylinder of geotextile both sides and lower cylinder, multiple radial direction pressure taps connect pressure tester respectively, lower cylinder is connected with obstetric pressurizing washing device, this new geotextile silting experiment instrument, vacuum suction saturation can be carried out, can accurate judgement geotextile whether the degree of silting and silting；Detect, work well after the geotextile of silting being rinsed and be rinsed.
Description
Technical field
The present invention relates to geotextile materials detecting instrument technical field, more particularly to a kind of new geotextile silting
Experiment instrument, it is mainly used in the penetration clogging characteristic test of geotextile and the test of silting developing result.
Background technology
Geotextile is the new geomaterial made of high molecular synthetic material, has good water penetration and less
Hole, it disclosure satisfy that requirement of the engineering to filtering material.As a result, the anti-filter performance of geosynthetics flood control and disaster reduction,
Reclaiming land around sea, across fields such as the remote water transfer in basin, environmental protection and urban construction obtain more and more extensive application.To ensure
Water can smoothly be discharged by geotextile, and and can makes to be protected the unlikely loss of soil body particle, and geotechnical fibre filter design often needs
Meet soil conservation, permeable and three criterions of silting blocking.But geotextile silting phenomenon is universal in engineer applied, makes it in anti-filter
Using receiving larger limitation, and geotextile it is stifled with it is in close relations by the property of the protection soil body.
Can silting be big problem that long-term use of about geotechnical fibre filter layer, to judge whether geotextile meets to prevent
Clogging criterion, gradient need to be carried out than experiment.China's water conservancy industry standard《Geosynthetics test procedure》(SL235-2012)
In specially show " experiment of 33. siltings " of geotextile, experiment regulation is determined under certain flow condition using gradient ratio method
Infiltration coefficient and infiltration ratio in soil-geotextile system and its interface, pass through infiltration coefficient and infiltration ratio drastically change
Change to judge the block possibility of geotextile.Existing experimental provision our experiments show that following defect be present：
(1) existing silting experimental provision is confined to saturation capillary saturation of soaking for soil body saturation process, it is clear that this is right
It is inapplicable in cohesive soil.Clay vacuum suction-immersion saturation, can be only achieved higher saturated soil.Soil body saturation
Insufficient effect that will directly affect seepage flow sludge plugging.
(2) existing silting experiment instrument using gradient than judgment criteria, also in place of Shortcomings.In penetration clogging experimentation
In, fine grained migrates in soil, if producing silting in geotextile, can make the reduction of its penetrating power.But in turn,
Penetrating power diminishes, and it is exactly to occur in geotextile that may not necessarily illustrate silting, because soil layer is in itself it can also happen that silting.I.e.
Soil geotextile thrashing has two aspects：On the one hand it is geotextile by silting, is on the other hand then soil sample by silting.
And existing silting experiment instrument can only measure the infiltration of the total system that soil sample is formed in the range of geotextile and its top 25mm
Coefficient, and the infiltration coefficient of soil sample in the range of independent measurement geotextile or its top 25mm is unable to, so just can not be well
Judge position caused by silting, can cause be in fact soil layer in itself caused silting be considered as at geotextile caused by silting
Erroneous judgement.
(3) existing experimental provision can only be carried out from unidirectional experiment of the beginning without silting-silting, it is impossible to geotechnique is knitted
Thing be rinsed after by silting-reverse experiment without silting, i.e., can not detect developing result.
This patent is to solve three technological deficiencies existing for existing geotextile silting experimental provision：(1) can not enter
Row vacuum suction saturation, soil sample-air existing for geotextile system are difficult to fully discharge, and can have a strong impact on experimental result；(2)
Be unable to accurate judgement geotextile whether the degree of silting and silting；(3) geotextile of silting can not be rushed
Wash and detected after rinsing.
The experimental provision of the application patent is exactly to solve above-mentioned three major issues design.
The content of the invention
The present invention provides a kind of new geotextile silting experiment instrument, can solve above mentioned problem of the prior art.
The invention provides a kind of new geotextile silting experiment instrument, including：Silting cylinder main body, head control dress
Put, pressure tester, vacuum suction saturation system and obstetric pressurizing washing device；
The silting cylinder main body includes：Top cover, upper cylinder, middle cylinder, lower cylinder and base, top cover, upper cylinder, middle cylinder, lower cylinder and bottom
Sealing is detachably connected seat successively, is connected inside upper cylinder, middle cylinder and lower cylinder, filter paper is detachably provided between upper cylinder and middle cylinder
Or filter screen, geotextile is detachably provided between middle cylinder and lower cylinder, the top cover is provided with water inlet and exhaust outlet, head control
Device processed is located at the top of water inlet, and water inlet is connected by silicone tube with head control device, and silicone tube is provided with tongs,
Silicone tube is connected on exhaust outlet, silicone tube presss from both sides provided with only gas, and base is provided with discharge outlet, discharge outlet connection drainpipe, draining
Pipe is provided with draining valve, and upper cylinder is connected with vacuum suction saturation system, is equipped with the middle cylinder of geotextile both sides and lower cylinder more
Individual radial direction pressure tap, multiple radial direction pressure taps connect pressure tester by sebific duct respectively, and lower cylinder is connected with obstetric pressurizing washing device.
It is preferred that the upper cylinder, middle cylinder and lower cylinder include：Cylindrical tube and two blocks of square plates, square plate
Center overlaps with the axis of cylindrical tube；The upper and lower port of cylindrical tube is fixedly connected with square plate respectively, the side
Shape plate is offered with cylindrical tube internal diameter circular hole of the same size by the center of circle of center, the square plate on the outside of circular hole
The different annular groove of two radius sizes is provided with, the center of circle of circular hole overlaps with the axis of two annular grooves, two annulars
O-ring seal is equipped with groove；Filter paper or filter screen are clamped in the interior side ring on two square plates between upper cylinder and middle cylinder
Between O-ring seal in connected in star, geotextile is clamped in the interior side ring on two square plates between middle cylinder and lower cylinder
Between O-ring seal in connected in star, two radius size differences corresponding with square plate also are provided with top cover and base
Annular groove, on top cover, base and two neighboring square plate it is circumferential offer it is multiple corresponding to bolts hole, it is two neighboring
Bolt hole on square plate is arranged between two annular grooves, and top cover, upper cylinder, middle cylinder, lower cylinder and base pass sequentially through more
Individual bolt is fixed through multiple bolts hole, and O-ring seal is cased between bolt hole and bolt to seal.
Pass through it is preferred that the head control device includes hand capstan, overflow water supply cylinder and water system, hand capstan
The steel wire rope that lower end is provided with hook is connected around fixed pulley with overflow water supply cylinder, and the hand capstan is closing self-locking, per lattice
Precision 5mm, the overflow water supply cylinder open up three holes at cylinder bottom；Three holes are fixedly connected with three height in cylinder respectively
Different pvc pipes, it is senior executive, middle pipe and low pipe；The lower end connection overflow pipe of senior executive, the lower end connection water system of middle pipe are low
The lower end of pipe connects water inlet by silicone tube, and silicone tube is provided with water check valve, dividing plate is provided between the middle pipe and low pipe.
It is preferred that the pressure tester includes pressure measurement plate and Duo Gen sebific ducts, the perpendicular of more 1.5m length is installed on pressure measurement plate
Straight pressure-measuring pipe, and the graph paper that minimum scale is 1mm is posted, more vertical pressure-measuring pipe lower ends pass through sebific duct and multiple radial directions respectively
Pressure tap connects one to one.
It is preferred that the vacuum suction saturation system includes：Vacuum meter valve, vavuum pump and deionized water water case, vacuum
Table valve is arranged on top cover by three-way connection, and is connected with upper cylinder, and three-way connection connects vavuum pump, deionization by pipeline
Water supply tank connects draining valve by pipeline.
It is preferred that the obstetric pressurizing washing device includes：Connect soon three-way connection, circular openings flush pipe, pressurised water tank, manually
Force (forcing) pump, pressure gauge, air-stopping valve and connect feed pipe soon, circular openings flush pipe 7 is set in lower cylinder, positioned at geotextile just under
Side, three-way connection is connect soon on lower cylinder, connect the both ends connection circular openings flush pipe that three-way connection is located on the inside of lower cylinder soon
Both ends, connect one end that three-way connection is located on the outside of lower cylinder soon and be connected by connecing feed pipe soon with pressurised water tank, air-stopping valve set
Connecing soon on feed pipe, Manual pressurization pump and pressure gauge are arranged on pressurised water tank.
It is preferred that the porous pressure-bearing porous disc for fixed placement permeable stone or bead is additionally provided with the upper cylinder inwall
Four the first necks.
It is preferred that the lower cylinder inwall is provided with multiple second necks for being used for placing porous pressure-bearing porous disc；Under described
Four through holes are radially offered on cylinder, be fixedly mounted one on four through holes connects straight coupling soon, connects straight coupling and glue soon
Pipe connects.
It is preferred that the straight coupling that connects soon selects 316L stainless steels.
It is preferred that the multiple pressure tap is 14,7 are that a component is distributed at middle cylinder and lower cylinder different height, two
Radial symmetric is distributed.
Compared with prior art, the beneficial effects of the present invention are：
By the way that test cylinder is divided into three upper cylinder, middle cylinder and lower cylinder parts, three parts connect and divided the work bright the present invention
Really, upper cylinder is mainly used in vacuum suction and water supply, and middle cylinder is the sticky soil sample of filling；Lower cylinder installs geotextile, passes through water inlet
Mouth, exhaust outlet, discharge outlet, vacuum suction saturation system carry out vacuum suction and enter water saturation, realize the high saturation of specimen sample
Degree, solves the problems, such as that traditional instrument can not make the abundant saturation of soil sample；Pass through multiple pressure taps of geotextile both sides and pressure measurement
Device, geotextile silting situation is directly monitored, traditional instrument is solved and is unable to asking for itself silting of accurate measurement geotextile
Topic；By the circular openings flush pipe and obstetric pressurizing washing device below geotextile, realize that press water is directed at geotextile
Progress mutually backwashes with former seepage direction, and geotextile is again that silting experiment can measure gradient again by Seepage Experiment after flushing
Than can detect developing result, solving the problems, such as flushing and effect detection that traditional instrument can not simulate geotextile.
The present invention is feasible by multigroup simulated experiment proof, can carry out vacuum suction saturation, can accurate judgement geotextile
Whether the degree of silting and silting；Detected after the geotextile of silting being rinsed and be rinsed, and effect is good
It is good.
Brief description of the drawings
Fig. 1 is a kind of structural representation of new geotextile silting experiment instrument provided by the invention.
Fig. 2 is Section A-A in a kind of new geotextile silting experiment instrument structural representation Fig. 1 provided by the invention
Profile.
Fig. 3 is section B-B in a kind of new geotextile silting experiment instrument structural representation Fig. 1 provided by the invention
Profile.
Description of reference numerals：
1- silting cylinder main bodys, 2- head control devices, 3- pressure testers, 4- vacuum suction saturation systems, 5- pressure flush
Device, 6- top covers, the upper cylinders of 7-, cylinder in 8-, cylinder under 9-, 10- bases, 11- water inlets, 12- exhaust outlets, 13- vacuum meter valves, 14-
Pressure tap, 15- meet three-way connection, 16- overflow water supply cylinders, 17- perforate flush pipes, 18- draining valves, 19- hand capstans, 20- soon
First neck, 21- permeable stones, 22- geotextiles, the square plates of 23-, 24- annular grooves, 25- bolts hole, 26- air-stopping valves.
Embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of the present invention is described in detail, it is to be understood that of the invention
Protection domain do not limited by embodiment.
As shown in Figure 1, Figure 2 and Figure 3, a kind of new geotextile silting experiment instrument provided in an embodiment of the present invention, bag
Include：Silting cylinder main body 1, head control device 2, pressure tester 3, vacuum suction saturation system 4 and obstetric pressurizing washing device 5；
The silting cylinder main body 1 includes：Top cover 6, upper cylinder 7, middle cylinder 8, lower cylinder 9 and base 10, top cover 6, upper cylinder 7, middle cylinder
8th, lower cylinder 9 and base 10 seal successively is detachably connected, and is connected inside upper cylinder 7, middle cylinder 8 and lower cylinder 9, upper cylinder 7 and middle cylinder 8 it
Between be detachably provided with filter paper or filter screen, geotextile 22 is detachably provided between middle cylinder 8 and lower cylinder 9, is set on the top cover 6
There are water inlet 11 and exhaust outlet 12, head control device 2 is located at the top of water inlet 11, and water inlet 11 passes through silicone tube and head
Control device 2 is connected, and silicone tube is provided with tongs, and silicone tube is connected on exhaust outlet 12, and silicone tube presss from both sides provided with only gas, base
10 are provided with discharge outlet, discharge outlet connection drainpipe, and drainpipe is provided with draining valve 18, upper cylinder 7 and vacuum suction saturation system 4
Connect, be equipped with multiple radial direction pressure taps 14 on the middle cylinder 8 of the both sides of geotextile 22 and lower cylinder 9, multiple radial direction pressure taps 14 divide
Pressure tester 3 is not connected by sebific duct, lower cylinder 9 is connected with obstetric pressurizing washing device 5.
It is preferred that the upper cylinder 7, middle cylinder 8 and lower cylinder 9 include：Cylindrical tube and two blocks of square plates 23, square plate
The center of part 23 overlaps with the axis of cylindrical tube；The upper and lower port of cylindrical tube is fixed with square plate 23 respectively to be connected
Connect, the square plate 23 using center as the center of circle offer with cylindrical tube internal diameter circular hole of the same size, outside circular hole
The square plate 23 of side is provided with the different annular groove 24 of two radius sizes, the center of circle of circular hole and two annular grooves 24
Axis is overlapped, and O-ring seal is equipped with two annular grooves 24；Filter paper or filter screen are clamped in two between upper cylinder 7 and middle cylinder 8
Between the O-ring seal in outer annular groove 24 on individual square plate 23, geotextile 22 is clamped in middle cylinder 8 and lower cylinder 9
Between two square plates 23 on outer annular groove 24 in O-ring seal between, also be provided with top cover 6 and base 10
The annular groove 24 different from corresponding two radius sizes on square plate 23, top cover 6, base 10 and two neighboring square plate
On part 23 it is circumferential offer it is multiple corresponding to bolts hole 25, the bolt hole 25 on two neighboring square plate 23 is arranged on two
Between annular groove 24, top cover 6, upper cylinder 7, middle cylinder 8, lower cylinder 9 and base 10 pass sequentially through multiple bolts and pass through multiple bolts hole
25 are fixed, and O-ring seal is cased between bolt hole 25 and bolt to seal.
The upper cylinder 7, middle cylinder 8, lower cylinder 9 are fixed with the square combination sealing of plate 23 by cylindrical tube body portion and formed；
The square plate 23 offers the circular hole consistent with cylindrical tube internal diameter in its middle, seals and connects with cylinder lower edges
Connect；The square plate offers annular groove 24 along 10mm, 25mm on the outside of circular hole, O-shaped to be placed when being contacted between cylinder
Sealing ring；8 diameter 6mm bolt hole 25 is circumferentially uniformly offered between two annular groove 24, so as to mutual between cylinder
It is fixed.
Inner side o types circle is additionally operable to clamp filter paper when being evacuated saturation between the upper cylinder 7 and middle cylinder 8, in seepage flow sludge plugging mistake
It is used to clamp nylon leaching net in journey；The o types sealing ring directly contacts with square plate 23 between cylinder, and internal diameter is not less than 7mm, line
Footpath thickness of geotextile 22 clamped by adjusts, it is ensured that sealing ring has enough deformations when tightening bolt, typically uses line footpath 2-3mm
Left and right O-ring stack combinations.
It is preferred that the head control device 2 includes hand capstan 19, overflow water supply cylinder 16 and water system, hand strand
The steel wire rope that disk 19 is provided with hook by lower end is connected around fixed pulley with overflow water supply cylinder 16, and the hand capstan 19 is closing
Self-locking, per lattice precision 5mm, the overflow water supply cylinder 16 opens up three holes at cylinder bottom；Three holes are solid in cylinder respectively
Surely three highly different pvc pipes are connected, are senior executive, middle pipe and low pipe；The lower end connection overflow pipe of senior executive, the lower end of middle pipe connects
Water system is connect, the lower end of low pipe connects water inlet 11 by silicone tube, and silicone tube is provided with water check valve, the middle pipe and low pipe
Between be provided with dividing plate.
Air free water is entered in overflow water supply cylinder 16 from water system by middle pipe, then passes through low pipe, silicone tube and water inlet
Mouthfuls 11 enter in upper cylinders 7, and senior executive causes water level in overflow water supply cylinder 16 to remain at the height of senior executive's upper port, unnecessary water
Flowed away by overflow pipe, you can keep ordinary water level state.Dividing plate is set between middle pipe and low pipe, entered with reducing bubble by low hole
Enter silting system.
It is preferred that the pressure tester 3 includes pressure measurement plate and Duo Gen sebific ducts, the perpendicular of more 1.5m length is installed on pressure measurement plate
Straight pressure-measuring pipe, and the graph paper that minimum scale is 1mm is posted, more vertical pressure-measuring pipe lower ends pass through sebific duct and multiple radial directions respectively
Pressure tap 14 connects one to one.
It is preferred that the vacuum suction saturation system 4 includes：Vacuum meter valve 13, vavuum pump and deionized water water case, very
Empty table valve 13 is arranged on top cover 6 by three-way connection, and is connected with upper cylinder 7, and three-way connection connects vavuum pump by pipeline,
Deionized water water case connects draining valve 18 by pipeline.
It is preferred that the obstetric pressurizing washing device 5 includes：Three-way connection 15, circular openings flush pipe 17, pressure (hydraulic) water are connect soon
Case, Manual pressurization pump, pressure gauge, air-stopping valve 26 and feed pipe is connect soon, circular openings flush pipe 17 is set in lower cylinder 9, positioned at soil
The underface of work fabric 22, three-way connection 15 is connect soon on lower cylinder 9, connect three-way connection 15 soon positioned at the two of the lower inner side of cylinder 9
The both ends of end connection circular openings flush pipe 17, three-way connection 15 is connect soon positioned at the one end in the lower outside of cylinder 9 by connecing feed pipe soon
It is connected with pressurised water tank, air-stopping valve 26 is arranged on to be connect on feed pipe soon, and Manual pressurization pump and pressure gauge are arranged at pressurised water tank
On.
It is preferred that it is additionally provided with the inwall of upper cylinder 7 saturating for the porous pressure-bearing of fixed placement permeable stone 21 or bead
Four the first necks 20 of water plate.
The first neck is provided with the upper lower edge 15mm of cylinder 7, it is fixed in system pumping saturation history to meet
The needs of permeable stone 21；First neck 20 is distributed in four positions of cylinder inboard wall, and two-way with the position transverse and longitudinal of pressure tap 14
Stagger, to prevent influenceing head at pressure tap 14.
It is preferred that the inwall of lower cylinder 9 is provided with multiple second necks for being used for placing porous pressure-bearing porous disc；Under described
Four through holes are radially offered on cylinder 9, be fixedly mounted one on four through holes connects straight coupling soon, connects straight coupling and glue soon
Pipe connects.
The second neck is provided with the lower lower edge 50mm of cylinder 9, to meet to place the need of porous pressure-bearing porous disc
Will, four through holes are radial direction pressure tap 14, connect the connection that straight coupling facilitates radial direction pressure tap 14 and sebific duct soon.
It is preferred that the straight coupling that connects soon selects 316L stainless steels, from 316L stainless steels, meet that straight coupling is acidproof
The requirement of caustic corrosion.
It is preferred that the multiple pressure tap 14 is 14,7 are that a component is distributed at middle cylinder 8 and the lower different height of cylinder 9,
Two radial symmetric distributions.
Top cover 6 opens up 2 screw thread mouths, and 1 screw thread mouth is opened up on base 10, for installing water check valve, the and of vacuum meter valve 13
Draining valve 18.
The vacuum meter valve 13 uses tee joint vacuum valve door table, and the threeway part is used to connect top cover 6, vacuum meter valve 13
And vavuum pump；The vacuum meter valve 13 is in open state when being evacuated saturation to system using vavuum pump, in flow event
It is closed.
Through hole radially is opened up at the lower top edge 50mm of cylinder 9, and fixed threeway quick union is installed；The threeway connects soon
Joint is when being rinsed experiment, both ends connection perforate annular high voltage pipe；The straight-through quick union connects in process of osmosis
Seal plug, obstetric pressurizing washing device 5 is connected in irrigation tests.
Application method and the course of work：As shown in Figure 1, Figure 2 and Figure 3, the square plate 23 of stripping device is ring flange, is taken out
Middle cylinder 8, sticky soil sample is prepared on demand and is tamped to required density, fills up middle cylinder 8；Take cylinder 7 to be inverted, place permeable stone and filter
Paper, filter paper diameter are slightly larger than the annular groove 24 of inner side；O-ring seal is laid in the annular groove 24 of upper cylinder 7, by
The middle cylinder 8 for filling sample preparation clay is moved to above the bottom of cylinder 7, and the bolt tightened between two is fixed；Between middle cylinder 8 and lower cylinder 9
Circular geotextile 22 and pressure-bearing filter screen to be measured are fixed, fixing means is identical with filter paper fixing means, tightens bolt；Will dress
Horizontalization is put, and lower cylinder 9 installs fixed roof 6, tighten bolt under；Close the water check valve on water inlet 11, close on drainpipe
Draining valve 18, the silicone tube that pressure tap 14 and exhaust outlet 12 connect sealed with tongs, rinse the three-way connection of mouth of pipe connection
One end is sealed with plug outside cylinder；Threeway vacuum meter valve 13 is connected into vavuum pump, while opens the valve of vacuum meter valve 13 and true
Empty pump, start to be evacuated saturation；When the reading of vacuum meter valve 13 reaches setting negative pressure, and maintain 1h, you can drainpipe is inserted and filled
It is micro- to open draining valve 18 in the tank of full distilled water, control water intake velocity so that vacuum meter reading kept stable；Treat water level
Cover sticky soil sample, you can close draining valve 18 and stop water inlet；Water inlet finishes, and closes vavuum pump, vacuum meter valve 13, unclamps exhaust
Tongs on pipe, stands overnight, and using air saturation soil sample, that is, completes vacuum suction saturation history.
Cylinder 7 is unloaded, withdraws from permeable stone 21, original filter paper is changed into nylon leaching net, cylinder 7 in refitting, unloads top cover 6,
One layer of bead is paved with nylon leaching net, resets top cover 6, opens water check valve water filling into device on water inlet 11, control
Water intake velocity is in order to avoid impact soil sample, until water overflows from the exhaust 12 of top cover 6, then system saturation is fully completed.
Overflow water supply cylinder 16 and drainpipe outlet height are adjusted with control system head size, if experiment requires ordinary water top news
Part then no longer adjusts in the process.
The tongs of draining valve 18 and each pressure tap 14 is opened, compresses the tongs of blast pipe, starts seepage flow sludge plugging process.
During, the reading of each pressure-measuring pipe is recorded, determines discharge outlet changes in flow rate, observes draining muddiness degree.To the end of silting process,
Determine geotextile oven-dry weight.
Rinse, solubility test embodiment：Repeat the above steps, analyze pressure-measuring pipe reading, until show that geotechnique knits
Thing infiltration coefficient reduces and stablizes conclusion within the specific limits, and connection connects three-way connection 15 and obstetric pressurizing washing device soon, keeps
It is sufficient with water in pressurised water tank, Manual pressurization pump is controlled, the reading on pressure gauge is remained stable substantially, in flushing process, note
Time and the pressure size of geotextile 22 are rinsed in record.After completing flushing process, flow event is reentered, treats pressure-measuring pipe reading
After basicly stable, the reading of each pressure-measuring pipe is recorded, and with the numeric ratio before flushing compared with the change of the analysis infiltration coefficient of geotextile 22
Change.Solubility test is designed in the case of being directed to geotextile chemical colmatage, and corresponding chemical reagent, remaining step need to be added in water tank
It is identical.
By the way that test cylinder is divided into three upper cylinder, middle cylinder and lower cylinder parts, three parts connect and divided the work bright the present invention
Really, upper cylinder 7 is mainly used in vacuum suction and water supply, inside sets neck and is used to fix permeable stone in saturation history is evacuated；Middle cylinder 8 is high
Degree is set to 50mm, and the depth of fill of cohesive soil is as generally by protection soil sample；Geotechnique is installed in the internal layer groove of lower cylinder 9 to knit
Thing 22, between mounting cylinder during connecting bolt on the set of junction miniature O-ring seal, traditional silting can be avoided to knit geotechnique in testing
Thing is placed directly in caused border on porous disc and streamed.
The top cover 6 on the upper top of cylinder 7 also opens up the vacuum meter mouth of pipe, vacuum meter valve 13 is true in addition to water inlet 11, exhaust outlet 12
Empty air aspiration stage is open and connects vavuum pump, and remaining situation is then closed.To meet the requirement of vacuum saturation high leakproofness, connect between cylinder
Inside and outside double-deck annular groove 24 is opened up on the square plate 23 at the place of connecing, for placing O-ring seal, these measures allow to pair
Whole test cylinder is vacuumized and entered water saturation, realizes the high saturation of specimen sample, solving traditional instrument can not make
The problem of soil sample abundant saturation.
In addition to by traditional silting experiment instrument, pressure tap 14 is set, in the range of close geotextile clamping zone 5mm, up and down
Radial direction pressure tap 14 is opened up, for directly monitoring geotextile silting situation, traditional instrument is solved and is unable to accurate measurement soil
The problem of itself silting of work fabric.
To simulate the flushing to silting thing, in the middle part of lower cylinder, side wall is radially opened at geotextile clip position 50mm
If the diameter 15mm mouths of pipe, and install pneumatically connect three-way connection 15 soon, wherein connect soon the both ends of three-way connection 15 be located in cylinder respectively with
Circular openings flush pipe 17 is end to end, and the other end is located on the outside of cylinder, is connected when rinsing with obstetric pressurizing washing device 5；Pressurization
Flusher 5 includes water tank, Manual pressurization pump and pressure gauge.Available pressure water alignment geotextile is carried out and former seepage direction phase
Backwash.Testing cylinder can be horizontal positioned, then does not deposit particulate silting thing on geotextile after rinsing, then by Seepage Experiment is silting
Experiment can measure gradient ratio again, can detect developing result.If there being chemical colmatage material on geotextile, it can be selected and close
It is rinsed in suitable reagent incorporation water, can dissolve chemical colmatage thing.This method, which solves traditional instrument, can not simulate geotechnique
The flushing of fabric and effect detection problem.
The invention discloses the experiment dress that a kind of new geotechnical fibre filter system silting performance test and silting are rinsed
Put, be mainly used in the penetration clogging characteristic test of geotextile and the test of silting developing result.The device includes：Silting device
Main body, head control device, pressure tester and obstetric pressurizing washing device.Technical solution of the present invention is carried out to traditional silting experiment instrument
Many improvement, the device after improvement can be vacuumized to whole test cylinder and enter water saturation, realize specimen sample
High saturation, solve the problems, such as that traditional instrument can not make the abundant saturation of soil sample；Close to geotextile clamping zone 5mm models
In enclosing, radial direction pressure tap 14 is opened up up and down, and for directly monitoring geotextile silting situation, solving traditional instrument can not be accurate
The problem of really measuring geotextile itself silting；The flusher to geotextile is mounted with, available pressure water is to geotextile
It is rinsed, developing result is detected by Seepage Experiment class.If there being chemical colmatage material on geotextile, it can be selected and close
It is rinsed in suitable reagent incorporation water, can dissolve chemical colmatage thing.This method, which solves traditional instrument, can not simulate geotechnique
The flushing of fabric and effect detection problem.
Disclosed above is only several specific embodiments of the present invention, and still, the embodiment of the present invention is not limited to this, is appointed
What what those skilled in the art can think change should all fall into protection scope of the present invention.
Claims (10)
- A kind of 1. new geotextile silting experiment instrument, it is characterised in that including：Silting cylinder main body (1), head control device (2), pressure tester (3), vacuum suction saturation system (4) and obstetric pressurizing washing device (5)；The silting cylinder main body (1) includes：Top cover (6), upper cylinder (7), middle cylinder (8), lower cylinder (9) and base (10), top cover (6), Upper cylinder (7), middle cylinder (8), lower cylinder (9) and base (10) seal be detachably connected successively, upper cylinder (7), middle cylinder (8) and lower cylinder (9) Inside is connected, and filter paper or filter screen are detachably provided between upper cylinder (7) and middle cylinder (8), can between middle cylinder (8) and lower cylinder (9) Dismounting is provided with geotextile (22), and the top cover (6) is provided with water inlet (11) and exhaust outlet (12), head control device (2) it is located at the top of water inlet (11), water inlet (11) is connected with head control device (2) by silicone tube, set on silicone tube There is tongs, silicone tube is connected on exhaust outlet (12), silicone tube presss from both sides provided with only gas, and base (10) is provided with discharge outlet, draining Mouth connection drainpipe, drainpipe are provided with draining valve (18), and upper cylinder (7) is connected with vacuum suction saturation system (4), positioned at geotechnique Multiple radial direction pressure taps (14), multiple radial direction pressure taps (14) point are equipped with the middle cylinder (8) and lower cylinder (9) of fabric (22) both sides Pressure tester (3) is not connected by sebific duct, lower cylinder (9) is connected with obstetric pressurizing washing device (5).
- 2. new geotextile silting experiment instrument as claimed in claim 1, it is characterised in that the upper cylinder (7), middle cylinder (8) include with lower cylinder (9)：Cylindrical tube and two pieces of square plates (23), the center of square plate (23) and cylindrical tube The axis of body overlaps；The upper and lower port of cylindrical tube is fixedly connected with square plate (23) respectively, the square plate (23) Offered by the center of circle of center with cylindrical tube internal diameter circular hole of the same size, on the square plate (23) on the outside of circular hole Provided with the different annular groove (24) of two radius sizes, the center of circle of circular hole overlaps with the axis of two annular grooves (24), and two O-ring seal is equipped with individual annular groove (24)；Filter paper or filter screen are clamped in two sides between upper cylinder (7) and middle cylinder (8) Between the O-ring seal in outer annular groove (24) on shape plate (23), geotextile (22) is clamped in middle cylinder (8) with Between the O-ring seal in the outer annular groove (24) on two square plates (23) between cylinder (9), top cover (6) and bottom The annular groove (24) different from corresponding two radius sizes on square plate (23), top cover (6), bottom also are provided with seat (10) It is circumferential on seat (10) and two neighboring square plate (23) to offer multiple corresponding bolts hole (25), two neighboring square plate Bolt hole (25) on part (23) is arranged between two annular grooves (24), top cover (6), upper cylinder (7), middle cylinder (8), lower cylinder (9) multiple bolts are passed sequentially through and are fixed through multiple bolts hole (25) with base (10), bolt hole (25) is between bolt O-ring seal is cased with to seal.
- 3. new geotextile silting experiment instrument as claimed in claim 1, it is characterised in that the head control device (2) Including hand capstan (19), overflow water supply cylinder (16) and water system, hand capstan (19) is provided with the steel wire of hook by lower end Rope is connected around fixed pulley with overflow water supply cylinder (16), and the hand capstan (19) is closing self-locking, per lattice precision 5mm, institute State overflow water supply cylinder (16) and three holes are opened up at cylinder bottom；Three holes be fixedly connected respectively in cylinder three it is highly different Pvc pipe, it is senior executive, middle pipe and low pipe；The lower end connection overflow pipe of senior executive, the lower end connection water system of middle pipe, under low pipe End connects water inlet (11) by silicone tube, and silicone tube is provided with water check valve, dividing plate is provided between the middle pipe and low pipe.
- 4. new geotextile silting experiment instrument as claimed in claim 1, it is characterised in that the pressure tester (3) includes Pressure measurement plate and Duo Gen sebific ducts, the vertical pressure-measuring pipe of more 1.5m length is provided with pressure measurement plate, and posts the seat that minimum scale is 1mm Millimeter paper, more vertical pressure-measuring pipe lower ends are connected one to one by sebific duct and multiple radial direction pressure taps (14) respectively.
- 5. new geotextile silting experiment instrument as claimed in claim 1, it is characterised in that the vacuum suction saturation system System (4) includes：Vacuum meter valve (13), vavuum pump and deionized water water case, vacuum meter valve (13) are arranged on by three-way connection On top cover (6), and it is connected with upper cylinder (7), three-way connection connects vavuum pump by pipeline, and deionized water water case passes through pipeline Connect draining valve (18).
- 6. new geotextile silting experiment instrument as claimed in claim 1, it is characterised in that the obstetric pressurizing washing device (5) include：Three-way connection (15), circular openings flush pipe (17), pressurised water tank, Manual pressurization pump, pressure gauge, air-stopping valve are connect soon (26) feed pipe and is soon connect, circular openings flush pipe (17) is set in lower cylinder (9), positioned at the underface of geotextile (22), soon Three-way connection (15) is connect on lower cylinder (9), the both ends connection annular that three-way connection (15) is located on the inside of lower cylinder (9) is connect soon and opens The both ends of hole flush pipe (17), one end that three-way connection (15) is located on the outside of lower cylinder (9) is connect soon by connecing feed pipe and pressurization soon Water tank is connected, and air-stopping valve (26) is arranged on to be connect on feed pipe soon, and Manual pressurization pump and pressure gauge are arranged on pressurised water tank.
- 7. new geotextile silting experiment instrument as claimed in claim 1, it is characterised in that on upper cylinder (7) inwall It is additionally provided with four the first necks (20) of the porous pressure-bearing porous disc for fixed placement permeable stone (21) or bead.
- 8. new geotextile silting experiment instrument as claimed in claim 1, it is characterised in that on lower cylinder (9) inwall Provided with multiple second necks for placing porous pressure-bearing porous disc；Radially offer four through holes on the lower cylinder (9), four One is fixedly mounted on through hole and connects straight coupling soon, connects straight coupling soon and is connected with sebific duct.
- 9. new geotextile silting experiment instrument as claimed in claim 8, it is characterised in that described to connect straight coupling choosing soon With 316L stainless steels.
- 10. new geotextile silting experiment instrument as claimed in claim 1, it is characterised in that the multiple pressure tap (14) it is 14,7 are that a component is distributed at middle cylinder (8) and lower cylinder (9) different height, two radial symmetric distributions.
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| CN201711154520.8A CN107677586B (en) | 2017-11-20 | 2017-11-20 | Geotextile silting experiment instrument |
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| CN109406363A (en) * | 2018-10-18 | 2019-03-01 | 昆明理工大学 | A kind of silting experimental provision of tailings material and its geotextile |
| CN109406367A (en) * | 2018-12-06 | 2019-03-01 | 中国科学院武汉岩土力学研究所 | A kind of geotextiles silting and permeability simulation experimental device |
| CN110044796A (en) * | 2019-05-15 | 2019-07-23 | 河海大学 | Geotechnical fibre filter performance and multifunctional tester |
| CN110595985A (en) * | 2019-10-29 | 2019-12-20 | 中南大学 | Geotextile performance testing system and method for compacted grouting soil nails |
| CN112540038A (en) * | 2020-12-21 | 2021-03-23 | 滁州学院 | Test device and method for testing coupling permeability characteristics of geotextile and sandy soil |
| CN113218841A (en) * | 2021-04-29 | 2021-08-06 | 同济大学 | Device and method for testing reverse filtration characteristic of geotextile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109406363A (en) * | 2018-10-18 | 2019-03-01 | 昆明理工大学 | A kind of silting experimental provision of tailings material and its geotextile |
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| CN109406367A (en) * | 2018-12-06 | 2019-03-01 | 中国科学院武汉岩土力学研究所 | A kind of geotextiles silting and permeability simulation experimental device |
| CN110044796A (en) * | 2019-05-15 | 2019-07-23 | 河海大学 | Geotechnical fibre filter performance and multifunctional tester |
| CN110595985A (en) * | 2019-10-29 | 2019-12-20 | 中南大学 | Geotextile performance testing system and method for compacted grouting soil nails |
| CN112540038A (en) * | 2020-12-21 | 2021-03-23 | 滁州学院 | Test device and method for testing coupling permeability characteristics of geotextile and sandy soil |
| CN113218841A (en) * | 2021-04-29 | 2021-08-06 | 同济大学 | Device and method for testing reverse filtration characteristic of geotextile |
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| CN107677586B (en) | 2024-06-21 |
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