CN104614297A - Geotechnical composite drainage material filter membrane horizontal seepage clogging discounting test device and test method thereof - Google Patents
Geotechnical composite drainage material filter membrane horizontal seepage clogging discounting test device and test method thereof Download PDFInfo
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- CN104614297A CN104614297A CN201510043584.5A CN201510043584A CN104614297A CN 104614297 A CN104614297 A CN 104614297A CN 201510043584 A CN201510043584 A CN 201510043584A CN 104614297 A CN104614297 A CN 104614297A
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- 239000012528 membrane Substances 0.000 title claims abstract description 72
- 239000000463 material Substances 0.000 title claims abstract description 49
- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 239000002131 composite material Substances 0.000 title claims abstract description 13
- 238000010998 test method Methods 0.000 title abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 94
- 238000009434 installation Methods 0.000 claims description 22
- 230000035515 penetration Effects 0.000 claims description 20
- 238000005422 blasting Methods 0.000 claims description 12
- 238000001764 infiltration Methods 0.000 claims description 7
- 230000008595 infiltration Effects 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 6
- 229920002379 silicone rubber Polymers 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 239000002689 soil Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 abstract 2
- 239000004927 clay Substances 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 238000005464 sample preparation method Methods 0.000 abstract 1
- 238000004062 sedimentation Methods 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000007596 consolidation process Methods 0.000 description 6
- 238000012113 quantitative test Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012279 drainage procedure Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000001363 water suppression through gradient tailored excitation Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Abstract
The invention relates to a geotechnical composite drainage material filter membrane horizontal seepage clogging discounting test method. The method comprises the following processes: filter membrane sample manufacturing comprises taking out geotechnical composite drainage material non-disturbance sample in clogging from a soil layer, and manufacturing a sample containing deposited clay on the surface layer of the filter membrane according to a specific sample preparation method, wherein the discounting of the geotechnical composite drainage material filter membrane horizontal seepage coefficient caused by sedimentation clogging after being used in the soil layer can be really simulated through the sample preparation; and meanwhile, a set of horizontal seepage coefficient test device is researched, the device can be used for simulating and testing the horizontal seepage coefficient of the filter membrane in different hydraulic gradient and different lateral pressure coefficient conditions, the sample prepared by using the above method and the unused filter membrane sample are used for performing contrast test to obtain a filter membrane clogging discounting index. The invention firstly provides the method and corresponding device for quantitatively testing the geotechnical composite drainage material filter membrane horizontal seepage clogging discounting, the device is simple, the operation is simple and easy to implement, and the measurement precision is high; the device can be used for testing the geotechnical composite drainage material filter membrane horizontal seepage coefficient.
Description
Technical field
The invention belongs to geosynthetics technical field of measurement and test, can be used for the quantitative test of geosynthetics draining material filter membrane silting reduction.
Background technology
Geosynthetics draining material is that the difform core material composition made with slim geotextile parcel different materials becomes a kind of composite draining material, and this material can the usual draining of drainage channel of core in the horizontal direction.
In recent years, along with the development of geosynthetics draining material, be widely used and indulge the fields such as cross drainage, buildings underdrainage passage, dykes and dams pumping equipment in Soft Ground, roadbed.At geosynthetics draining material in drainage procedure, outer filter membrane is an important component part of geosynthetics draining total displacement along the discharge that filter membrane in-plane is dredged, but due to soil particle assemble be deposited on filter membrane space inner by, reduce the effective discharge area of passage gradually, and then reduce the drainage efficiency (hydraulic conductivity) along filter membrane in-plane.At present, what the silting for filter membrane caused does not set up unified standard along filter membrane in-plane drainage efficiency reduction index, and rarely has report especially for reduction quantitative test, and related experiment equipment is also in conceptual phase.The present invention by the new method for making sample of development and related experiment equipment for geosynthetics draining material filter membrane provides reference along the quantitative test of filter membrane in-plane silting reduction index.
Summary of the invention
Be the quantitative test problem in order to solve geosynthetics draining material filter membrane silting reduction index, and propose a kind of geosynthetics draining material filter membrane horizontal penetration clogging reduction proving installation and method of testing thereof.
The present invention is achieved through the following technical solutions:
A kind of geosynthetics draining material filter membrane horizontal penetration clogging reduction proving installation, is characterized in that comprising with lower device, water feed apparatus, load means, drainage arrangement;
Described water feed apparatus comprises assembly type water level pipe, sealing lock, draining ozzle, slidably hold-down support, connecting hose, filling pipe, described assembly type water level pipe one end connects filling pipe, and the other end connects connecting hose, the sidewall side of described assembly type water level pipe has multiple draining ozzle, this draining ozzle is by only water gate control, and opposite side has slidably hold-down support, and the other end of this slidably hold-down support has rule;
Described load means has water inlet, water delivering orifice, shell, sample groove, glass outer wall, assembly and connection mouth, water pressure room connector, scale, bearing, the bottom of the both sides of described sample groove respectively has a shell, and the bottom of this shell has bearing, one of them connection water inlet of described shell, another connects water delivering orifice, and described water inlet is connected with connecting hose, and described sample groove has glass outer wall, the top of this sample groove is assembly and connection mouth, and bottom is water pressure room connector;
Described drainage arrangement has header tank and collector pipe, and described collector pipe one end connects water delivering orifice, and the other end connects header tank.
A kind of geosynthetics draining material filter membrane horizontal penetration clogging reduction proving installation, it is characterized in that described sample groove is for placing sample, this sample is layer structure, be followed successively by geosynthetics draining material filter membrane from bottom to top, filter membrane top layer silt seam and silicon rubber skin, the thickness of described sample is the even rectangular pieces of 0.4cm, and test piece bed-plate dimension is divided into 14 × 10cm, 14 × 8cm, 14 × 6cm, 10 × 10cm, 10 × 8cm, 10 × 6cm, six kinds of specifications, the thickness of described silicon rubber skin is 0.1cm.
A kind of geosynthetics draining material filter membrane horizontal penetration clogging reduction proving installation, this device also comprises a specimen holder, this clamping device comprises rubber peel and support, described specimen holder is hollow-core construction, upper and lower both sides are rubber peel, and the left and right sides is support, and inner space is for placing sample, this hollow-core construction and specimen size match, and can guarantee that geosynthetics draining material filter membrane all can water proof with external position.
Geosynthetics draining material filter membrane horizontal penetration clogging reduction proving installation carries out a method for sample testing, it is characterized in that comprising the following steps:
Step one, carries out assembling and testing device according to claim 1;
Step 2, according to sample standard according to claim 2, carries out making sample;
Step 3, test, puts into clamper by sample, and puts into sample groove by the flexible pipe gap height control that connects load means water delivering orifice to a little more than starting toward combining the in-built water of water level pipe behind shell upper end, slow draining also observes interior situation, until bubble emptying in device;
Step 4, infiltration coefficient is tested.According to test head requirement for height, open the corresponding tongs of combined water level pipe, and continue to add water toward combined water level pipe to guarantee that water level remains unchanged, and collect the load means water delivering orifice discharge water yield and corresponding time.Composite sample infiltration coefficient can be recorded according to data, the size of silting reduction coefficient can be calculated according to related data.
Horizontal-hole blasting calculating formula is:
In formula: k
t-horizontal-hole blasting (cm/s);
L-seepage direction length (cm
3);
Δ h-piezometric tube differential water pressures (cm);
T-mensuration dredges water yield time (s);
The water yield (cm is dredged in W-t time
3);
B-specimen width (cm);
δ-sample thickness (cm).
Filter membrane silting reduction coefficient calculating formula is:
In formula: φ-silting reduction coefficient;
K
t1-use filtering membrane sample permeability rate (cm/s);
K
t0-do not use filtering membrane sample permeability rate (cm/s).
The silting reduction situation after the use of geotechnological composite, water-drain material filter membrane horizontal-hole blasting can be gone out by quantificational expression by above filter membrane sample horizontal-hole blasting and silting reduction coefficient.
Beneficial effect:
According to geosynthetics draining material filter membrane silting testing feature and demand, adopt special method for making sample, comparatively truly can reflect filter membrane horizontal direction seepage flow situation in the silting situation of filter membrane and use procedure, propose filter membrane silting reduction coefficient calculating formula simultaneously and can be quantificational expression filter membrane silting situation reference is provided.
According to geosynthetics draining material filter membrane silting test major influence factors and test main points, testing apparatus has good watertightness and impermeability, can simulate Penetration Signature under the seepage effect of different wall pressure and hydraulic gradient, device has that equipment is simple, easy and simple to handle, measuring accuracy high.
Accompanying drawing explanation
Below in conjunction with drawings and the embodiments, the present invention is further detailed explanation:
Fig. 1 is that the filter membrane sample of geosynthetics draining material filter membrane of the present invention horizontal Penetration Signature silting reduction proving installation and method is by effect of water pressure schematic diagram.
Fig. 2 is the filter membrane sample water seepage direction schematic diagram of geosynthetics draining material filter membrane of the present invention vertical Penetration Signature silting reduction proving installation and method.
Fig. 3 is the schematic diagram of the specimen holder of geosynthetics draining material filter membrane of the present invention vertical Penetration Signature silting reduction proving installation and method.
Fig. 4 is the load pipe schematic diagram of geosynthetics draining material filter membrane of the present invention vertical Penetration Signature silting reduction proving installation and method.
Fig. 5 is the water pressure room schematic diagram of geosynthetics draining material filter membrane of the present invention vertical Penetration Signature silting reduction proving installation and method.
Fig. 6 is water pressure room and the load pipe assembling schematic diagram of geosynthetics draining material filter membrane of the present invention vertical Penetration Signature silting reduction proving installation and method.
Fig. 7 is the overall package schematic diagram of geosynthetics draining material filter membrane of the present invention vertical Penetration Signature silting reduction proving installation and method.
Embodiment
Below in conjunction with specific embodiment, set forth the present invention further.
A kind of geosynthetics draining material filter membrane horizontal penetration clogging reduction proving installation, is characterized in that comprising with lower device, water feed apparatus, load means, drainage arrangement;
Described water feed apparatus comprises assembly type water level pipe 14, sealing lock 15, draining ozzle 16, slidably hold-down support 17, connecting hose 18, filling pipe 19, described assembly type water level pipe 14 one end connects filling pipe 19, and the other end connects connecting hose 18, the sidewall side of described assembly type water level pipe 14 has multiple draining ozzle 16, this draining ozzle 16 is controlled by sealing lock 15, and opposite side has slidably hold-down support 17, and the other end of this slidably hold-down support 17 has rule;
Described load means has water inlet 5, water delivering orifice 6, shell 7, sample groove 8, glass outer wall 9, assembly and connection mouth 10, water pressure room connector 11, scale 12, bearing 13, the bottom of the both sides of described sample groove 8 respectively has a shell 7, and the bottom of this shell 7 has bearing 13, one of them connection water inlet 5 of described shell 7, another connects water delivering orifice 6, and described water inlet 5 is connected with connecting hose 18, and described sample groove 8 has glass outer wall 9, the top of this sample groove 8 is assembly and connection mouth 10, and bottom is water pressure room connector 11;
Described drainage arrangement has header tank 20 and collector pipe 21, and described collector pipe 21 one end connects water delivering orifice 6, and the other end connects header tank 20.
Described sample groove 8 is for placing sample, this sample is layer structure, is followed successively by geosynthetics draining material filter membrane 1 from bottom to top, filter membrane top layer silt seam 1-1 and silicon rubber skin 2, the thickness of described sample is the even rectangular pieces of 0.4cm, test piece bed-plate dimension is divided into 14 × 10cm, 14 × 8cm, 14 × 6cm, 10 × 10cm, 10 × 8cm, 10 × 6cm six kinds of specifications, the thickness of described silicon rubber skin 2 is 0.1cm.
This device also comprises a specimen holder, this clamping device comprises rubber peel 3 and support 4, described specimen holder is hollow-core construction, upper and lower both sides are rubber peel 3, the left and right sides is support 4, inner space is for placing sample, and this hollow-core construction and specimen size match, and can guarantee that geosynthetics draining material filter membrane 1 all can water proof with external position.
Adopt foregoing a kind of geosynthetics draining material filter membrane horizontal penetration clogging reduction proving installation to carry out a method for sample testing, it is characterized in that comprising the following steps:
Device using method describes:
1, device installation and adjustment.
(1) load means is installed.After load means each several part has been assembled, can tentatively install after testing fixture strength of joint.Carry out precision leveling after preliminary installation, concrete grammar is: use level meter to make base plane be on surface level, guarantee that base plane fixedly secures base after being in surface level, avoids, due to external interference, the displacements such as skew occur.
(2) water feed apparatus is installed.After rule and combination water level pipe have been connected, can tentatively install after checking strength of joint.Carry out precision leveling after preliminary installation, concrete grammar is: first adjust rule height, is that on rule 0 scale mark and load means base, plane is in same level; Adjustment rule attitude, makes it perpendicular to base surface level, even if water level pipe centerline is on pedal line.Fixedly secure water feed apparatus after having adjusted, avoid, due to external interference, the displacements such as skew occur.
(3) drainage arrangement is installed.Drainage arrangement is installed on height lower than below load means base plane height, guarantees that water surface curve in header tank inner product water tank is lower than load means base plane, prevent water level harmony height from affecting the seepage flow of sample in load means.
(4) testing fixture watertightness.After each several part has been connected, load means water delivering orifice is sealed, topped up with water in combined water level pipe, whether testing fixture each several part has water oozes out phenomenon, if there is not the phenomenon that seeps water, can carry out next step test, if there is infiltration phenomenon, then need to re-start assembling, and testing fixture watertightness again, until next step test can be carried out after guaranteeing device watertightness.
2, sample production.
Because test needs, this test combinations sample needs to make various sample according to the difference of top layer silt depth and the degree of consolidation thereof, 0.2cm, 0.3cm, 0.4cm, 05cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm, 1cm nine kinds of specifications can be divided into according to top layer silt depth difference, 25%, 50%, 75%, 100% Four types can be divided into according to top layer silt seam degree of consolidation difference, 14 × 10cm can be divided into according to sample bed-plate dimension difference, 14 × 8cm, 14 × 6cm, 10 × 10cm, 10 × 8cm, 10 × 6cm six kinds of specifications.When making sample, carry out combination respectively and make all kinds sample, the sample being 25% as the top layer silt seam degree of consolidation makes the sample that silt depth is 0.2cm, 0.3cm, 0.4cm, 05cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm, 1cm nine kinds of specifications respectively, and often kind of specification needs making 14 × 10cm, 14 × 8cm, 14 × 6cm, 10 × 10cm, 10 × 8cm, 10 × 6cm six kinds of specifications.
Be 25% by the making top layer silt seam degree of consolidation below, thickness is 0.2cm, and bed-plate dimension is 14 × 10cm is that example is described in detail to sample production process:
Prepare through overtesting geosynthetics draining in early stage material discharging consolidation, after the soil body reaches the degree of consolidation 25%, stop draining, geosynthetics draining material surrounding soil is excavated, and stops top layer silt depth, remove inner core after cutting off geosynthetics draining material, take out the filter membrane with top layer mud.Using geotechnological cutter to cut geosynthetics draining material top layer silt seam makes it reach 0.2cm, accurately cuts out according to bed-plate dimension 14 × 10cm, after put into sample holder internal fixtion.
3, sample testing.
(1) be vented.Test experiments starts, and should first drain bubble in whole test unit.Exhaust concrete grammar is: first loaded in sample groove by the sample holder that soil body sample is housed, cover sample lid and carry out water-proofing treatment with underwater paint; The flexible pipe gap height control connecting load means water delivering orifice is combined the in-built water of water level pipe to a little more than beginning behind shell upper end is past, and slow draining also observes interior situation, until bubble emptying in device.
(2) infiltration coefficient test.According to test head requirement for height, open the corresponding tongs of combined water level pipe, and continue to add water toward combined water level pipe to guarantee that water level remains unchanged, and collect the load means water delivering orifice discharge water yield and corresponding time.Composite sample infiltration coefficient can be recorded according to data, silting reduction size can be calculated according to related data.
Horizontal-hole blasting calculating formula is:
In formula: k
t-horizontal-hole blasting (cm/s);
L-seepage direction length (cm
3);
Δ h-piezometric tube differential water pressures (cm);
T-mensuration dredges water yield time (s);
The water yield (cm is dredged in W-t time
3);
B-specimen width (cm);
δ-sample thickness (cm).
Filter membrane silting reduction coefficient calculating formula is:
In formula: φ-silting reduction coefficient;
K
t1-use filtering membrane sample permeability rate (cm/s);
K
t0-do not use filtering membrane sample permeability rate (cm/s).
The silting reduction situation after the use of geotechnological composite, water-drain material filter membrane horizontal-hole blasting can be gone out by quantificational expression by above filter membrane sample horizontal-hole blasting and silting reduction coefficient.
Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Claims (4)
1. a geosynthetics draining material filter membrane horizontal penetration clogging reduction proving installation, is characterized in that comprising with lower device, water feed apparatus, load means, drainage arrangement;
Described water feed apparatus comprises assembly type water level pipe (14), sealing lock (15), draining ozzle (16), slidably hold-down support (17), connecting hose (18), filling pipe (19), described assembly type water level pipe (14) one end connects filling pipe (19), the other end connects connecting hose (18), the sidewall side of described assembly type water level pipe (14) has multiple draining ozzle (16), this draining ozzle (16) is controlled by sealing lock (15), opposite side has slidably hold-down support (17), the other end of this slidably hold-down support (17) has rule,
Described load means has water inlet (5), water delivering orifice (6), shell (7), sample groove (8), glass outer wall (9), assembly and connection mouth (10), water pressure room connector (11), scale (12), bearing (13), the bottom of the both sides of described sample groove (8) respectively has a shell (7), the bottom of this shell (7) has bearing (13), one of them connection water inlet (5) of described shell (7), another connects water delivering orifice (6), described water inlet (5) is connected with connecting hose (18), described sample groove (8) has glass outer wall (9), the top of this sample groove (8) is assembly and connection mouth (10), bottom is water pressure room connector (11),
Described drainage arrangement has header tank (20) and collector pipe (21), and described collector pipe (21) one end connects water delivering orifice (6), and the other end connects header tank (20).
2. a kind of geosynthetics draining material filter membrane as claimed in claim 1 horizontal penetration clogging reduction proving installation, it is characterized in that described sample groove (8) is for placing sample, this sample is layer structure, be followed successively by geosynthetics draining material filter membrane (1) from bottom to top, filter membrane top layer silt seam (1-1) and silicon rubber skin (2), the thickness of described sample is the even rectangular pieces of 0.4cm, test piece bed-plate dimension is divided into 14 × 10cm, 14 × 8cm, 14 × 6cm, 10 × 10cm, 10 × 8cm, 10 × 6cm, six kinds of specifications, the thickness of described silicon rubber skin (2) is 0.1cm.
3. a kind of geosynthetics draining material filter membrane as claimed in claim 2 horizontal penetration clogging reduction proving installation, this device also comprises a specimen holder, this clamping device comprises rubber peel (3) and support (4), described specimen holder is hollow-core construction, upper and lower both sides are rubber peel (3), the left and right sides is support (4), inner space is for placing sample, this hollow-core construction and specimen size match, and can guarantee that geosynthetics draining material filter membrane (1) all can water proof with external position.
4. adopt a kind of geosynthetics draining material filter membrane horizontal penetration clogging reduction proving installation as described in claim 1-3 to carry out a method for sample testing, it is characterized in that comprising the following steps:
Step one, carries out assembling and testing device according to claim 1;
Step 2, according to sample standard according to claim 2, carries out making sample;
Step 3, test, puts into clamper by sample, and puts into sample groove by the flexible pipe gap height control that connects load means water delivering orifice to a little more than starting toward combining the in-built water of water level pipe behind shell upper end, slow draining also observes interior situation, until bubble emptying in device;
Step 4, infiltration coefficient is tested, according to test head requirement for height, open the corresponding tongs of combined water level pipe, and continue to add water toward combined water level pipe to guarantee that water level remains unchanged, and collect the load means water delivering orifice discharge water yield and corresponding time, composite sample infiltration coefficient can be recorded according to data, the size of silting reduction coefficient can be calculated according to related data;
Horizontal-hole blasting calculating formula is:
In formula: k
t-horizontal-hole blasting (cm/s);
L-seepage direction length (cm
3);
Δ h-piezometric tube differential water pressures (cm);
T-mensuration dredges water yield time (s);
The water yield (cm is dredged in W-t time
3);
B-specimen width (cm);
δ-sample thickness (cm);
Filter membrane silting reduction coefficient calculating formula is:
In formula: φ-silting reduction coefficient;
K
t1-use filtering membrane sample permeability rate (cm/s);
K
t0-do not use filtering membrane sample permeability rate (cm/s),
The silting reduction situation after the use of geotechnological composite, water-drain material filter membrane horizontal-hole blasting can be gone out by quantificational expression by above filter membrane sample horizontal-hole blasting and silting reduction coefficient.
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| CN104897188A (en) * | 2015-06-17 | 2015-09-09 | 上海水顿智能科技有限公司 | Method and experiment apparatus for analyzing drainage pipeline siltation characteristics |
| CN105866001A (en) * | 2016-04-18 | 2016-08-17 | 三峡大学 | Device and method for measuring rock-soil body osmotic coefficient based on water-based fluorescent agent dilution method |
| CN106248558A (en) * | 2016-10-14 | 2016-12-21 | 山东大学 | Fill big particle diameter rubber lamellar body and hit device for testing permeability coefficient and the method for real soil |
| CN106353237A (en) * | 2016-09-21 | 2017-01-25 | 内蒙古自治区水利科学研究院 | Net type filter system testing device of water-saving irrigation project |
| CN107703038A (en) * | 2017-09-19 | 2018-02-16 | 中交天津港湾工程研究院有限公司 | Geotextile is compressed axially method clogging test device and method |
| CN108680484A (en) * | 2018-06-11 | 2018-10-19 | 三峡大学 | A kind of pervious concrete blocks the assay method of permeance property decaying |
| CN108956409A (en) * | 2017-05-19 | 2018-12-07 | 中国地质科学院水文地质环境地质研究所 | A kind of minute-pressure permeameter and test method |
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| CN111103225A (en) * | 2020-01-23 | 2020-05-05 | 中铁第四勘察设计院集团有限公司 | Tunnel geotextile physical clogging measuring device and method |
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