CN113390771A - Indoor high-water-content dredged mud permeability test system and permeability test method - Google Patents
Indoor high-water-content dredged mud permeability test system and permeability test method Download PDFInfo
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- CN113390771A CN113390771A CN202110554937.3A CN202110554937A CN113390771A CN 113390771 A CN113390771 A CN 113390771A CN 202110554937 A CN202110554937 A CN 202110554937A CN 113390771 A CN113390771 A CN 113390771A
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- 230000035699 permeability Effects 0.000 title claims abstract description 23
- 238000010998 test method Methods 0.000 title description 3
- 238000004062 sedimentation Methods 0.000 claims abstract description 102
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 84
- 230000035515 penetration Effects 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 19
- 210000005239 tubule Anatomy 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 230000003068 static effect Effects 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims description 22
- 239000002689 soil Substances 0.000 claims description 22
- 230000008859 change Effects 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 13
- 239000011148 porous material Substances 0.000 claims description 9
- 210000003739 neck Anatomy 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 5
- 230000008595 infiltration Effects 0.000 claims description 4
- 238000001764 infiltration Methods 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims 2
- 238000007689 inspection Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
Abstract
The invention discloses an indoor high-water content dredged mud penetration test system in the technical field of dredged mud treatment and geotechnical engineering test intersection, which comprises a segmental sedimentation cylinder unit, wherein a top fixing disc is fixedly installed at the top end of the segmental sedimentation cylinder unit, three full threaded rods are respectively inserted into the left side and the right side of the top fixing disc, the indoor high-water content dredged mud penetration test system is communicated with the atmosphere through a water level control tubule, normal water head pressure control is simultaneously carried out on the water inlet end and the water outlet end of a sample by utilizing the atmospheric pressure and liquid static pressure balance principle, the control of any water head pressure difference is realized, and meanwhile, as the inner diameter of an outer pipe of a penetration device is smaller, the sample water head difference is conveniently controlled, the sample water flow is conveniently monitored, so that the penetration coefficient of the dredged mud with high water content is obtained, the sealing performance is good, the operation process is relatively simple and reliable, and the occupied area is small, Low cost. The invention also discloses a method for carrying out a permeability test on the indoor high-water-content dredged mud permeability test system.
Description
Technical Field
The invention relates to the technical field of dredging sludge treatment and geotechnical engineering test intersection, in particular to an indoor high-water-content dredging sludge penetration test system. The invention also relates to a method for performing a permeability test by adopting the indoor high-water-content dredged mud permeability test system.
Background
With the rapid development of water environment treatment engineering of inland rivers and lakes in China, large-scale river and lake dredging engineering and construction engineering of ports and navigation channels are developed every year in China, a large amount of dredged mud is inevitably generated, and for the generated large-scale high-water-content dredged mud, China often adopts a large-area storage mode for disposal, and dredged mud with extremely high water content is blown into a storage yard to be deposited and solidified under the action of self weight.
The traditional constant head penetration test adopts higher water inlet and outlet pressure difference to obtain the permeability coefficient of the soil body under larger flow, and the variable head test method adopts thinner water head pipes, so that more accurate flow change can be obtained in the penetration test process, but because the water inlet level changes simultaneously when the flow change is obtained, the water quantity change in the water head pipes cannot be obtained when the permeability coefficient of the soil body is too large or the initial water head is too small, so that the traditional penetration test device can only carry out the penetration test on a soil sample with certain rigidity and cannot be suitable for dredging mud in a flowing state, and accordingly, an indoor high-water-content dredging mud penetration test system is provided, the permeability coefficient of the high-water-content dredging mud can be obtained, the operation process is relatively simple and reliable, the occupied area is small, and the cost is low.
Disclosure of Invention
The invention aims to provide an indoor high-water-content dredged mud penetration test system which is simpler and more efficient in structure, more convenient to operate and more accurate in data acquisition. The invention also aims to provide a method for carrying out the permeability test on the indoor high-water-content dredged mud permeability test system.
In order to achieve the purpose, the invention provides the following technical scheme: an indoor high-water content dredged mud penetration test system comprises a sedimentation device and a penetration device, wherein a sample upper water level control mechanism is arranged at the upper part of the sedimentation device, the sedimentation device comprises a plurality of transparent segmental sedimentation cylinder units, the top ends of the segmental sedimentation cylinder units are fixedly provided with special-shaped sedimentation cylinder units, the upper parts of the special-shaped sedimentation cylinder units are provided with long and narrow sedimentation cylinder necks, the lower parts of the special-shaped sedimentation cylinder units are provided with sedimentation cylinder lower parts with diameters corresponding to the segmental sedimentation cylinder units, the bottom ends of the segmental sedimentation cylinder units are fixedly provided with bottom fixing discs, the top fixing discs are provided with sleeve holes, the top fixing discs are sleeved on the sedimentation cylinder necks of the special-shaped sedimentation cylinder units through the sleeve holes of the top fixing discs, the top fixing discs and the bottom fixing discs are in full-threaded rod threaded connection, the special-shaped sedimentation cylinder units and the segmental sedimentation cylinder units are clamped between the top fixing discs and the bottom fixing discs, and sealing rings are arranged at the matching parts of the special-shaped sedimentation cylinder units and the segmental sedimentation cylinder units, a sealing ring is arranged at the matching position of the adjacent segmental sedimentation cylinder units, the top end of each special-shaped sedimentation cylinder unit is sleeved with a rubber cap, and the side wall of each segmental sedimentation cylinder unit is fixedly provided with a pore pressure monitoring meter; the upper side of the bottom fixed disc is provided with a mounting groove, a permeable stone is arranged in the mounting groove, and the bottom of the mounting groove is connected with a bottom drain valve communicating the inside and the outside;
the upper water level control mechanism of the sample comprises the special-shaped sedimentation cylinder unit, a water level control thin pipe, the rubber cap and a vent valve communicated with the inside and the outside, the water level control thin pipe penetrates through the rubber cap and enters the lower part of the sedimentation cylinder of the special-shaped sedimentation cylinder unit, and the vent valve is installed at the top end of the rubber cap;
the infiltration device comprises an organic glass tube with a scale, a rubber cap, a water level control tubule, a vent valve and a bottom support, wherein the rubber cap is sleeved at the upper end of the organic glass tube, the lower end of the organic glass tube is arranged on the bottom support, the rubber cap, the organic glass tube and the bottom support are surrounded to form a sealed cavity, the vent valve is arranged on the rubber cap and communicated with the inside and the outside, the water level control tubule penetrates through the rubber cap and enters the inner cavity of the organic glass tube, the outer wall of the water level control tubule is marked with scales, and the bottom end of the bottom support is provided with a connector;
and the connector of the penetration device is connected with a drain valve at the bottom of the sedimentation device through a pipeline.
Preferably, the infiltration device is connected with the sedimentation device by a rigid plastic pipe.
Preferably, the outer side wall of the segmental sedimentation cylinder unit is symmetrically provided with graduated scales for sedimentation monitoring.
Preferably, the side wall of the organic glass tube is provided with a graduated scale.
Preferably, the lower end of the full threaded rod is connected with an adjusting nut, and the flatness is ensured by rotating the adjusting nut to adjust the flatness of the sedimentation device.
The method for performing the permeability test by adopting the indoor high-water-content dredged mud permeability test system comprises the following steps
a. Uniformly stirring the test soil sample by using a stirrer, and measuring the relevant physical parameters of the soil sample by using an indoor conventional soil test;
b. assembling to form a sedimentation device, and then injecting water into the assembled sedimentation device to check whether each joint and the installation position of the pore pressure monitor 12 are tight or not, so as to ensure the sealing property of the equipment;
c. adjusting a nut of a combined settling column base to further keep the smoothness of the instrument, transferring an initial settling slurry suspension with a concentration used for a configuration test to a sectional settling cylinder unit after the inspection step is finished, and detecting whether water seepage occurs at the sectional settling cylinder unit and the joint of the sectional settling cylinder unit and a bottom fixed disc;
d. the method comprises the following steps that graduated scales are pasted on the side wall of an assembled sedimentation device and the outer wall of a water level control thin tube at symmetrical positions, in the self-weight sedimentation process of slurry suspension, a drain valve at the bottom is in a closed state, so that the slurry is deposited in a static water state in a self-weight mode, and the sedimentation reading and the pore pressure reading of a slurry-water interface are recorded in real time;
e. after the slurry is stably deposited, opening a drain valve at the bottom, and adjusting the height position of a water level control tubule on the sedimentation device and the height position of a water level control tubule on the osmosis device to ensure that the water head pressure difference in the soil sample cannot cause the deformation of the soil sample in the sedimentation device, and simultaneously ensure that the flow measured by the sectional sedimentation cylinder unit reaches a stable value along with the change of time;
f. and observing the liquid level at the uppermost end of the sedimentation device and the position change of the top end of the soil sample in real time corresponding to the graduated scale, observing the liquid level change of an organic glass tube of the penetration device corresponding to the graduated scale, and accurately obtaining the change of the flow of water passing through the sample along with the time in the penetration test process so as to calculate the permeability coefficient of the sample.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the distance between the segmental settling cylinder units is adjusted by adjusting the heights of the three full threaded rods, so that soil samples with different heights can be stored between every two segmental settling cylinder units, and different numbers of segmental settling cylinder units can be placed.
2. According to the invention, the water level control thin tube is communicated with the atmosphere, the constant head pressure control is simultaneously carried out on the water inlet end and the water outlet end of the sample by utilizing the atmospheric pressure and hydrostatic pressure balance principle, the control of any head pressure difference is realized, and meanwhile, the inner diameter of the outer tube of the penetration device is smaller, so that not only is the head difference of the sample conveniently controlled, but also the flow rate of the sample water is conveniently monitored, and further, the more accurate high-water content dredged mud permeability coefficient can be obtained, and the whole tightness of the system is good, so that the system has the advantages of relatively simple and reliable operation process, small occupied area and low cost.
Drawings
Fig. 1 is a schematic view of the overall configuration of an indoor high water content dredged mud penetration test system provided by the present invention;
figure 2 is a front view of the settling device of figure 1;
figure 3 is a rear view of the settling device of figure 1;
FIG. 4 is a front view of the permeation device of FIG. 1;
FIG. 5 is a cross-sectional view of the bottom stationary disk of FIG. 2;
FIG. 6 is a cross-sectional view of the top stationary disk of FIG. 2;
fig. 7 is a top view of the sectional settler unit of fig. 2.
In the figure: 1. a segmental settling cylinder unit; 2. a top fixing disc; 3. three full threaded rods; 4. a bottom fixing disc; 5. a graduated scale; 6. a special-shaped settling cylinder unit; 7. a water level control thin tube; 8. a vent valve; 9. a rubber cap; 10. an organic glass tube; 11. a bottom support; 12. a pore pressure monitor; 13. a seal ring; 14. a permeable stone; 15. a nut; 16. a bottom drain valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, the invention provides an indoor high water content dredged mud penetration test system, which comprises a sedimentation device and a penetration device, wherein a sample upper water level control mechanism is arranged at the upper part of the sedimentation device, the sedimentation device comprises a plurality of transparent segmental sedimentation cylinder units 1, a special-shaped sedimentation cylinder unit 6 is fixedly arranged at the top end of each segmental sedimentation cylinder unit 1, 4 segmental sedimentation cylinder units 1 are vertically stacked in the embodiment, the upper part of each special-shaped sedimentation cylinder unit 6 is provided with a long and narrow sedimentation cylinder neck part, the segmental sedimentation cylinder units 1 and the special-shaped sedimentation cylinder units 6 are made of transparent materials such as transparent resin materials, the transparent segmental sedimentation cylinder units 1 and the special-shaped sedimentation cylinder units 6 are favorable for observing the separation condition of liquid level, soil sample and liquid level, the lower parts of the segmental sedimentation cylinder units 1 are provided with lower sedimentation cylinder parts with diameters corresponding to the diameters, bottom fixing discs 4 are fixedly arranged at the bottom ends of the segmental sedimentation cylinder units 1, the top fixing disc 2 is provided with a sleeve hole, the top fixing disc 2 is sleeved on the neck part of the settling cylinder of the special-shaped settling cylinder unit 6 through the sleeve hole, the top fixing disc 2 is connected with the bottom fixing disc 4 through a full threaded rod 3, the special-shaped settling cylinder unit 6 and the plurality of segmental settling cylinder units 1 are clamped between the top fixing disc 2 and the bottom fixing disc 4, a sealing ring 13 is arranged at the matching part of the special-shaped settling cylinder unit 6 and the segmental settling cylinder units 1, a sealing ring 13 is arranged at the matching part of the adjacent segmental settling cylinder units 1, a rubber cap 9 is sleeved at the top end of the shaped settling cylinder unit 6, and a hole pressure monitoring meter 12 is fixedly arranged on the side wall of the segmental settling cylinder unit 1; the upper side of the bottom fixed disc 4 is provided with a mounting groove, a permeable stone 14 is arranged in the mounting groove, and the bottom of the mounting groove is connected with a bottom drain valve 16 communicating the inside and the outside;
the upper water level control mechanism of the sample comprises a special-shaped sedimentation cylinder unit 6, a water level control thin tube 7, a rubber cap 9 and a vent valve 8 communicating the inside and the outside, the water level control thin tube 7 penetrates through the rubber cap 9 and enters the lower part of the sedimentation cylinder of the special-shaped sedimentation cylinder unit 6, the outer wall of the water level control thin tube 7 is marked with scales 5, and the top end of the rubber cap 9 is provided with the vent valve 8;
the infiltration device comprises an organic glass tube 10 with a scale, a rubber cap 9, a water level control tubule 7, a vent valve 8 and a bottom support 1, wherein the upper end of the organic glass tube 10 is sleeved with the rubber cap 9, the lower end of the organic glass tube is arranged on the bottom support 11, the rubber cap 9, the organic glass tube 10 and the bottom support 11 are surrounded to form a sealed cavity, the vent valve 8 is arranged on the rubber cap 9 and communicated with the inside and the outside, the water level control tubule 7 penetrates through the rubber cap 9 and enters the inner cavity of the organic glass tube 10, the outer wall of the water level control tubule 7 is marked with scales 5, and the bottom end of the bottom support 11 is provided with a connector;
the connector of the penetrating device is connected with a drain valve 16 at the bottom of the sedimentation device through a rigid plastic pipe.
Referring to fig. 2 and 3, the outer side wall of the segmental sedimentation cylinder unit 1 is symmetrically provided with a graduated scale 5 for sedimentation monitoring, the side wall of the organic glass tube 10 is provided with the graduated scale 5, the graduated scale 5 can be a transparent sticker with scales, the transparent sticker is pasted on the outer wall, and the graduated scale 5 is helpful for reading liquid level data.
Referring to fig. 2, the lower end of the full threaded rod is connected with an adjusting nut 15, and the flatness is ensured by rotating the adjusting nut 15 to adjust the flatness of the settling device.
The method for performing the permeability test by adopting the indoor high-water-content dredged mud permeability test system comprises the following steps
a. Uniformly stirring the test soil sample by using a stirrer, and measuring the relevant physical parameters of the soil sample by using an indoor conventional soil test;
b. assembling to form a sedimentation device, and then injecting water into the assembled sedimentation device to check whether each joint and the installation position of the pore pressure monitor 12 are tight or not, so as to ensure the sealing property of the equipment;
c. the flatness of the instrument is further kept by adjusting the nuts 15 of the combined settling column base, after the inspection step is finished, the initial settling slurry suspension with the concentration used for the configuration test is transferred to the segmental settling cylinder unit 1, and whether the water seepage phenomenon exists at the segmental settling cylinder unit 1 and the joint of the segmental settling cylinder unit 1 and the bottom fixed disk 4 is detected;
d. the scale 5 is pasted on the side wall of the assembled sedimentation device and the outer wall of the water level control tubule 7 at symmetrical positions, in the self-weight sedimentation process of the slurry suspension, the bottom drain valve 16 is in a closed state, so that the slurry is deposited in a static water state by self weight, and the sedimentation reading and the pore pressure reading of the slurry-water interface are recorded in real time;
e. after the slurry is settled stably, opening a drain valve 16 at the bottom, and adjusting the height position of a water level control tubule 7 on the settling device and the height position of the water level control tubule 7 on the osmosis device to ensure that the water head pressure difference in the soil sample does not cause the deformation of the slurry sample in the settling device, and simultaneously ensure that the flow measured by the sectional settling cylinder unit 1 reaches a stable value along with the change of time;
f. and observing the liquid level at the uppermost end of the sedimentation device and the position change of the top end of the soil sample in real time corresponding to the graduated scale 5, observing the liquid level change of an organic glass tube 10 of the penetration device corresponding to the graduated scale (5), and accurately obtaining the change of the flow of water passing through the sample along with the time in the penetration test process so as to calculate the permeability coefficient of the sample.
The working principle of the invention is as follows: constant head pressure is controlled at two ends of a dredged mud sample after sedimentation stabilization through a sedimentation device, a water level control device and a penetration device, so that flow change in the mud is accurately obtained under the condition of applying lower constant head pressure difference, the penetration coefficient of the dredged mud with high water content is obtained, the sealing performance is good, the operation process is relatively simple and reliable, the occupied area is small, and the cost is low;
the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The utility model provides an indoor high water content dredged mud permeability test system which characterized in that: comprises a sedimentation device and a penetration device, wherein the upper part of the sedimentation device is provided with a sample upper water level control mechanism, the sedimentation device comprises a plurality of transparent segmental sedimentation cylinder units (1), the top ends of the segmental sedimentation cylinder units (1) are fixedly provided with special-shaped sedimentation cylinder units (6), the upper parts of the special-shaped sedimentation cylinder units (6) are provided with long and narrow sedimentation cylinder necks, the lower parts of the sedimentation cylinder necks are provided with sedimentation cylinder lower parts with diameters corresponding to the segmental sedimentation cylinder units (1), the bottom ends of the segmental sedimentation cylinder units (1) are fixedly provided with bottom fixed disks (4), the top fixed disks (2) are provided with trepanning, the top fixed disks are sleeved on the sedimentation cylinder necks of the special-shaped sedimentation cylinder units (6) through trepanning holes, the top fixed disks (2) and the bottom fixed disks (4) are connected through full threaded rods (3), the special-shaped sedimentation cylinder units (6) and the segmental sedimentation cylinder units (1) are clamped between the top fixed disks (2) and the bottom fixed disks (4), a sealing ring (13) is arranged at the matching position of the special-shaped sedimentation cylinder unit (6) and the sectional sedimentation cylinder unit (1), a sealing ring is arranged at the matching position of the adjacent sectional sedimentation cylinder unit (1), a rubber cap (9) is sleeved at the top end of the special-shaped sedimentation cylinder unit (6), and a pore pressure monitoring meter (12) is fixedly arranged on the side wall of the sectional sedimentation cylinder unit (1); the upper side of the bottom fixed disc (4) is provided with a mounting groove, a permeable stone (14) is arranged in the mounting groove, and the bottom of the mounting groove is connected with a bottom drain valve (16) communicating the inside and the outside;
the upper water level control mechanism of the sample comprises the special-shaped sedimentation cylinder unit (6), a water level control thin pipe (7), the rubber cap (9) and a ventilation valve (8) communicating the inside and the outside, the water level control thin pipe (7) penetrates through the rubber cap (9) to enter the lower part of the sedimentation cylinder of the special-shaped sedimentation cylinder unit (6), and the ventilation valve (8) is installed at the top end of the rubber cap (9);
the infiltration device comprises an organic glass tube (10) with a scale, a rubber cap (9), a water level control tubule (7), a vent valve (8) and a bottom support (11), wherein the upper end of the organic glass tube (10) is sleeved with the rubber cap (9), the lower end of the organic glass tube is arranged on the bottom support (11), the rubber cap (9), the organic glass tube (10) and the bottom support (11) are surrounded to form a sealed cavity, the vent valve (8) is arranged on the rubber cap (9) and communicated with the inside and the outside, the water level control tubule (7) penetrates through the rubber cap (9) to enter an inner cavity of the organic glass tube (10), the outer wall of the water level control tubule (7) is marked with scales (5), and the bottom end of the bottom support (11) is provided with a connector;
the connector of the penetration device is connected with a drain valve (16) at the bottom of the sedimentation device through a pipeline.
2. The indoor high water content dredged mud penetration test system of claim 1, wherein: the penetration device is connected with the sedimentation device by a hard plastic pipe.
3. The indoor high water content dredged mud penetration test system of claim 1, wherein: and graduated scales (5) for settlement monitoring are symmetrically arranged on the outer side wall of the segmental settling cylinder unit (1).
4. The indoor high water content dredged mud penetration test system of claim 1, wherein: the side wall of the organic glass tube (10) is provided with a graduated scale (5).
5. The indoor high water content dredged mud penetration test system of claim 1, wherein: the lower extreme of full threaded rod is connected with adjusting nut (15), and through rotating adjusting nut (15) adjustment settlement device's level and accuracy, ensure to level.
6. A method for performing a permeability test using the indoor high water content dredged mud permeability test system of claim 1, wherein: comprises the following steps
a. Uniformly stirring the test soil sample by using a stirrer, and measuring the relevant physical parameters of the soil sample by using an indoor conventional soil test;
b. assembling to form a sedimentation device, and then injecting water into the assembled sedimentation device to check whether each joint and the installation position of the pore pressure monitor 12 are tight or not, so as to ensure the sealing property of the equipment;
c. the flatness of the instrument is further kept by adjusting a nut (15) of a combined settling column base, after the checking step is finished, initial settling slurry turbid liquid with the concentration used for the configuration test is transferred to the segmental settling cylinder unit (1), and whether the water seepage phenomenon exists at the segmental settling cylinder unit (1) and the joint of the segmental settling cylinder unit and the bottom fixed disk (4) is detected;
d. the method comprises the following steps that graduated scales (5) are pasted on the side wall of an assembled sedimentation device and the outer wall of a water level control thin pipe (7) in symmetrical positions, in the self-weight sedimentation process of slurry suspension, a bottom drain valve (16) is in a closed state, so that the slurry is deposited in a static water state in a self-weight mode, and sedimentation readings and pore pressure readings of a mud-water interface are recorded in real time;
e. after the slurry is settled stably, opening a bottom drain valve (16), and adjusting the height position of a water level control tubule (7) on the settling device and the height position of the water level control tubule (7) on the osmosis device to ensure that the water head pressure difference in the soil sample does not cause the deformation of the soil sample in the settling device and simultaneously ensure that the flow measured by the sectional settling cylinder unit (1) reaches a stable value along with the change of time;
f. the liquid level at the uppermost end of the sedimentation device and the position change of the top end of the soil sample are observed in real time corresponding to the graduated scale (5), the liquid level change of an organic glass tube (10) of the penetration device is observed corresponding to the graduated scale (5), the change of the flow of water passing through the sample along with the time in the penetration test process is accurately obtained, and therefore the penetration coefficient of the sample is calculated.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114034620A (en) * | 2021-11-08 | 2022-02-11 | 四川大学 | Method for determining permeability of cohesive soil body by utilizing columnar experiment |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080061279A (en) * | 2006-12-27 | 2008-07-02 | 한국건설기술연구원 | Constant head permeability test apparatus for porous materials |
| CN101813690A (en) * | 2010-05-11 | 2010-08-25 | 河海大学 | Testing device for simulating warp self-weight settlement consolidation process by settlement column indoors |
| CN103207136A (en) * | 2013-03-19 | 2013-07-17 | 河海大学 | Device and method for measuring hydraulic permeability-electroosmosis coefficients |
| CN205003057U (en) * | 2015-10-16 | 2016-01-27 | 温州际高检测仪器有限公司 | Geotechnique's cloth permeates performance test appearance perpendicularly |
| CN205280549U (en) * | 2016-01-08 | 2016-06-01 | 三峡大学 | Chang shuitou ground body osmotic coefficient testing arrangement is moved in light perturbation |
| CN105938081A (en) * | 2016-07-13 | 2016-09-14 | 长春黄金研究院 | Determination device and method for mine tailing filling grain class distribution rules |
| CN205591195U (en) * | 2016-03-25 | 2016-09-21 | 华中科技大学 | Ultra -soft dredger fill layering sedimentometer |
| CN205670111U (en) * | 2016-04-27 | 2016-11-02 | 上海理工大学 | Simulation constant head permeability apparatus |
| CN207066934U (en) * | 2017-05-24 | 2018-03-02 | 河北天辰仪器设备有限公司 | Geosynthetics Vertical permeameter |
| CN108776095A (en) * | 2018-06-15 | 2018-11-09 | 上海绿地环境科技股份有限公司 | The measurement device and method of a kind of sponge urban green space construction cavernous body infiltration rate |
| CN109085103A (en) * | 2017-06-13 | 2018-12-25 | 南京林业大学 | A kind of test device and test method of big gap bituminous concrete infiltration coefficient |
| CN109269959A (en) * | 2018-11-15 | 2019-01-25 | 重庆大学 | A kind of large size water level controllable type soil permeability coefficient measurement device and measuring method |
| CN109975192A (en) * | 2019-04-22 | 2019-07-05 | 中南大学 | The infiltration measuring device and method of different osmotic gradient lower leaf sand transition process |
| CN110146395A (en) * | 2019-05-14 | 2019-08-20 | 浙江大学 | A kind of laboratory testing rig measuring multilayer soil sample seepage inflow erosion characteristic under pressure in situ |
| CN110487699A (en) * | 2019-08-23 | 2019-11-22 | 淮阴工学院 | A kind of experimental rig and test method of pervious concrete infiltration coefficient |
| CN210604631U (en) * | 2019-07-31 | 2020-05-22 | 盐城市盐都区水务局秦南水务站(468253898) | Indoor tester for high water content dredged soil under low stress and negative pressure state |
| CN111337415A (en) * | 2020-04-18 | 2020-06-26 | 华中科技大学 | Full-automatic hydraulic infiltration consolidation device |
-
2021
- 2021-05-21 CN CN202110554937.3A patent/CN113390771A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080061279A (en) * | 2006-12-27 | 2008-07-02 | 한국건설기술연구원 | Constant head permeability test apparatus for porous materials |
| CN101813690A (en) * | 2010-05-11 | 2010-08-25 | 河海大学 | Testing device for simulating warp self-weight settlement consolidation process by settlement column indoors |
| CN103207136A (en) * | 2013-03-19 | 2013-07-17 | 河海大学 | Device and method for measuring hydraulic permeability-electroosmosis coefficients |
| CN205003057U (en) * | 2015-10-16 | 2016-01-27 | 温州际高检测仪器有限公司 | Geotechnique's cloth permeates performance test appearance perpendicularly |
| CN205280549U (en) * | 2016-01-08 | 2016-06-01 | 三峡大学 | Chang shuitou ground body osmotic coefficient testing arrangement is moved in light perturbation |
| CN205591195U (en) * | 2016-03-25 | 2016-09-21 | 华中科技大学 | Ultra -soft dredger fill layering sedimentometer |
| CN205670111U (en) * | 2016-04-27 | 2016-11-02 | 上海理工大学 | Simulation constant head permeability apparatus |
| CN105938081A (en) * | 2016-07-13 | 2016-09-14 | 长春黄金研究院 | Determination device and method for mine tailing filling grain class distribution rules |
| CN207066934U (en) * | 2017-05-24 | 2018-03-02 | 河北天辰仪器设备有限公司 | Geosynthetics Vertical permeameter |
| CN109085103A (en) * | 2017-06-13 | 2018-12-25 | 南京林业大学 | A kind of test device and test method of big gap bituminous concrete infiltration coefficient |
| CN108776095A (en) * | 2018-06-15 | 2018-11-09 | 上海绿地环境科技股份有限公司 | The measurement device and method of a kind of sponge urban green space construction cavernous body infiltration rate |
| CN109269959A (en) * | 2018-11-15 | 2019-01-25 | 重庆大学 | A kind of large size water level controllable type soil permeability coefficient measurement device and measuring method |
| CN109975192A (en) * | 2019-04-22 | 2019-07-05 | 中南大学 | The infiltration measuring device and method of different osmotic gradient lower leaf sand transition process |
| CN110146395A (en) * | 2019-05-14 | 2019-08-20 | 浙江大学 | A kind of laboratory testing rig measuring multilayer soil sample seepage inflow erosion characteristic under pressure in situ |
| WO2020228230A1 (en) * | 2019-05-14 | 2020-11-19 | 浙江大学 | Indoor test apparatus for measuring seepage erosion characteristics of multilayer soil samples under in-situ pressure |
| CN210604631U (en) * | 2019-07-31 | 2020-05-22 | 盐城市盐都区水务局秦南水务站(468253898) | Indoor tester for high water content dredged soil under low stress and negative pressure state |
| CN110487699A (en) * | 2019-08-23 | 2019-11-22 | 淮阴工学院 | A kind of experimental rig and test method of pervious concrete infiltration coefficient |
| CN111337415A (en) * | 2020-04-18 | 2020-06-26 | 华中科技大学 | Full-automatic hydraulic infiltration consolidation device |
Non-Patent Citations (4)
| Title |
|---|
| S.A. BERILGEN等: "Compression and permeability relationships in high water content clays", 《APPLIED CLAY SCIENCE》 * |
| 丁留谦: "《水利水电工程青年学术论文集》", 30 November 1992, 中国科学技术出版社 * |
| 张力霆等: "一种测定极软粘性土固结参数的方法—水力固结试验", 《河北水利专科学校学报》 * |
| 高梦颖: "流态疏浚泥自重下压缩—渗透性状试验研究", 《中国优秀博硕士学位论文全文数据库(硕士) 工程科技Ⅱ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114034620A (en) * | 2021-11-08 | 2022-02-11 | 四川大学 | Method for determining permeability of cohesive soil body by utilizing columnar experiment |
| CN114034620B (en) * | 2021-11-08 | 2022-09-16 | 四川大学 | Method for determining permeability of cohesive soil body by utilizing columnar experiment |
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