CN110398516B - Partitioned electroosmosis viscosity reduction test device and method for strain control between soil body and metal interface - Google Patents
Partitioned electroosmosis viscosity reduction test device and method for strain control between soil body and metal interface Download PDFInfo
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- CN110398516B CN110398516B CN201910798832.5A CN201910798832A CN110398516B CN 110398516 B CN110398516 B CN 110398516B CN 201910798832 A CN201910798832 A CN 201910798832A CN 110398516 B CN110398516 B CN 110398516B
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- 238000005370 electroosmosis Methods 0.000 title claims abstract description 104
- 239000002184 metal Substances 0.000 title claims abstract description 40
- 239000002689 soil Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims description 12
- 238000010998 test method Methods 0.000 claims abstract description 9
- 238000005192 partition Methods 0.000 claims description 16
- 230000002209 hydrophobic effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000011664 nicotinic acid Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 silt and the like Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 239000002699 waste 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
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- General Health & Medical Sciences (AREA)
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a zoned electroosmosis viscosity reduction test device and a test method for strain control between a soil body and a metal interface, wherein the device comprises a device base, an electroosmosis anode, an electroosmosis cathode, an insulating strip, a hard insulating base, a thin metal sheet, a resistance strain gauge, a flexible insulating pad, a controller, a power connector, a pull rod, a power connector output port, a signal receiving port and a bolt; when the device is in contact with soil, the thin metal sheet deforms, the strain of different parts of the resistance strain gauge measuring device is transmitted to the controller, the controller transmits the adaptive voltage to the corresponding electroosmosis area, and electroosmosis viscosity reduction control of different degrees can be carried out on each part according to feedback of different adhesion conditions of each part of the device and the soil, so that the device is an effective means for optimizing viscosity reduction and resistance reduction between the soil and a metal interface.
Description
Technical Field
The invention belongs to the technical field of tunnel and underground engineering test instruments, and particularly relates to a zoned electroosmosis viscosity reduction test device and a test method for strain control between a soil body and a metal interface.
Technical Field
With the continuous deep urban process in China, the construction of urban underground traffic networks is greatly developed. The shield construction plays a great role in urban tunnel construction by virtue of the characteristics of rapidness, high efficiency and the like. However, when the shield passes through clay strata such as mucky soil, silt and the like, mud cakes are formed on the surface of the cutterhead after the dregs cut by the cutterhead are extruded, and the formation and diffusion of the mud cakes can cause adverse effects such as abrasion of a shield cutter, reduction of tunneling capability, increase of torque of the cutterhead and the like. Therefore, the method aims at the problem of mud cake formation of the cutter disc, researches on the formation of mud cakes, how to avoid the formation of mud cakes and the like, and has very important engineering value and academic value.
At present, there are many researches on electroosmosis tests of viscosity reduction and resistance reduction between soil and metal interface, such as: ren Louquan in the study of electroosmosis viscosity-reducing and resistance-reducing application of a non-smooth surface, electroosmosis is applied to a loader bucket, and experiments prove that the electroosmosis bucket has good soil removing effect; hou Lei in the "bionic micro electro-osmosis viscosity reduction desorption exploration", experimental researches on the influence of factors such as electro-osmosis voltage, electro-osmosis anode and cathode area, electro-osmosis effect and the like on electro-osmosis viscosity reduction are carried out, a carriage model of the dumper is designed and processed, and the electro-osmosis method is found to have a good soil removal effect through the bionic electro-osmosis experimental researches. However, in actual situations, the adhesion conditions of different parts of the device and the soil body are different, the above electroosmosis test device is used for electrifying the whole device by rated voltage, the area with larger adhesion often cannot obtain a sufficient viscosity reduction effect, the area with smaller adhesion obtains sufficient electroosmosis but inevitably causes resource waste, and the electroosmosis test cannot be carried out by selecting the voltage size which is suitable for the actual adhesion conditions of different parts of the device and the soil body.
In order to overcome the defects, the invention provides a zoned electroosmosis viscosity reduction test device and a test method for strain control between a soil body and a metal interface, wherein a resistance strain gauge is used for measuring the strain of different areas of an electroosmosis device, an electric signal is transmitted to a controller, and finally, a proper voltage is transmitted to a corresponding electroosmosis area through the controller, so that electroosmosis viscosity reduction control of different degrees can be carried out on each part according to feedback of different adhesion conditions of each part of the device and the soil body, and the optimal viscosity reduction resistance reduction effect is achieved.
Disclosure of Invention
The invention provides a zoned electroosmosis viscosity reduction test device and a test method for strain control between a soil body and a metal interface, which aim to solve the problem that the current test means cannot select proper voltage according to the actual adhesion condition between the soil body and the metal interface to carry out electroosmosis test, and the resistance strain gauge 7 is used for measuring the strain conditions of different parts of the electroosmosis device, and the proper voltage is transmitted to the corresponding electroosmosis area through the controller 9 so as to achieve the optimal electroosmosis effect.
The zoned electroosmosis viscosity reduction test device for strain control between soil and metal interface is characterized by comprising a device base 1, an electroosmosis anode 2, an electroosmosis cathode 3, an insulating strip 4, a hard insulating base 5, a thin metal sheet 6, a resistance strain gauge 7, a flexible insulating pad 8, a controller 9, a power connector 10, a pull rod 11, a power output port 12, a signal receiving port 13 and a bolt 14;
the side length of the device base 1 is 9.2cm, the thickness is 1cm, the device base is used for fixing electroosmosis cathodes 3 of different upper partitions, and the center position of the lower part is connected with a pull rod 11 through a bolt 14;
the electroosmosis cathodes 3 are 2-3 cm in side length and are arranged on the upper part of the device base 1, 9 electroosmosis cathodes 3 are uniformly distributed on the device base 1 in a pasting mode, adjacent electroosmosis cathodes 3 are separated through insulating strips 4, and the thickness of the insulating strips 4 is 0.1cm;
the electroosmosis cathode 3 is provided with a square hole at the center, a thin metal sheet 6 is arranged at the upper part of the hole, a resistance strain gauge 7 is arranged below the thin metal sheet 6, a flexible insulating pad 8 is arranged below the resistance strain gauge 7, the resistance strain gauge 7 is wrapped, and a square groove with the same width is formed in the corresponding position of the device base 1 to accommodate the resistance strain gauge 7 and the flexible insulating pad 8;
the hard insulating base 5 is made of hydrophobic material, the section of the hard insulating base is trapezoid, and the hard insulating base is arranged at the upper part of the electroosmosis cathode 3 and distributed in a ring shape; the hard insulating base 5 can avoid short circuit between the electroosmosis anode 2 and the electroosmosis cathode 3 caused by more water accumulated at the electroosmosis cathode 3 in the electroosmosis process;
the electroosmosis anode 2 is stuck on the hard insulating base 5 and is also distributed in a ring shape;
the controller 9 is arranged on the pull rod 11; the controller 9 is provided with a power connector 10 for connecting an input direct current power supply;
the pull rod 11 is provided with a groove at the tail part, and the groove wall is provided with a hole for arranging a bolt 14 for connecting with a tension measuring device.
Further, the controller 9 is provided with a power output port 12 and a signal receiving port 13, the signal receiving port 13 is connected with the resistance strain gauge 7 by using a wire, and the power output port 12 is connected with the electroosmosis anode 2 and the electroosmosis cathode 3;
the electroosmosis anode 2 of each partition is provided with a lead which passes through the hard insulating base 5 at any point and is connected with the positive electrode of the power output port 12;
the electroosmosis cathode 3 of each partition is provided with a lead downwards at any point thereof and is connected with the cathode of the power output port 12;
the zonal electroosmosis viscosity reduction test method for the strain control type between the soil body and the metal interface adopts the zonal electroosmosis viscosity reduction test device for the strain control type between the soil body and the metal interface for test, and comprises the following steps:
step 1: the power connector 10 is connected with a power supply, so that the thin metal sheet 6 is not affected by pressure, and the power output port 12 does not output current;
step 2: applying normal pressure to the pull rod 11 to enable the device to be in contact with a test soil body, after the device is pressed, the thin metal sheet 6 deforms, the resistance strain gauge 7 transmits the measured strain to the controller 9, the controller 9 judges the pressure of each partition according to strain feedback, and controls the output voltage so that the device stands on the soil body to perform electroosmosis;
step 3: after standing for t min, normal pulling force is applied to the pull rod 11 to pull the device out of the soil body, the thin metal sheet 6 deforms in the pulling process, the resistance strain sheet 7 transmits the measured strain to the controller 9, the controller 9 judges the pressure of each partition according to strain feedback, and the output voltage is controlled until the device is not affected by soil body adhesion after being pulled out completely, and electroosmosis is finished.
Advantageous effects
The invention provides a zoned electroosmosis viscosity reduction test device and a test method for strain control between a soil body and a metal interface, wherein the test device comprises a device base 1, an electroosmosis anode 2, an electroosmosis cathode 3, an insulating strip 4, a hard insulating base 5, a thin metal sheet 6, a resistance strain gauge 7, a flexible insulating pad 8, a controller 9, a power connector 10, a pull rod 11, a power output port 12, a signal receiving port 13 and a bolt 14; the resistance strain gauge 7 transmits the measured strain to the controller 9, and the controller 9 judges the pressure of each partition according to strain feedback and controls the output voltage, so that the problem that the current test means can not select the voltage suitable for the actual adhesion condition of different parts of the device and soil to carry out electroosmosis test is effectively solved.
Drawings
FIG. 1 is a schematic view of a device according to the present invention, wherein (a) is a cross-sectional view of the device and (b) is a top view of the device;
FIG. 2 is a schematic diagram of a connection of a resistive strain gauge to a controller;
description of the reference numerals: the device comprises a device base 1, an electroosmosis anode 2, an electroosmosis cathode 3, an insulating strip 4, a hard insulating base 5, a thin metal sheet 6, a resistance strain gauge 7, a flexible insulating pad 8, a controller 9, a power connector 10, a pull rod 11, a power output port 12, a signal receiving port 13 and a bolt 14.
Detailed Description
The invention will be further described with reference to the drawings and examples.
1-2, a zoned electroosmosis viscosity reduction test device for strain control between soil and metal interface is characterized by comprising a device base 1, an electroosmosis anode 2, an electroosmosis cathode 3, an insulating strip 4, a hard insulating base 5, a thin metal sheet 6, a resistance strain gauge 7, a flexible insulating pad 8, a controller 9, a power connector 10, a pull rod 11, a power output port 12, a signal receiving port 13 and a bolt 14;
the side length of the device base 1 is 9.2cm, the thickness is 1cm, the device base is used for fixing electroosmosis cathodes 3 of different upper partitions, and the center position of the lower part is connected with a pull rod 11 through a bolt 14;
the electroosmosis cathodes 3 are 2-3 cm in side length and are arranged on the upper part of the device base 1, 9 electroosmosis cathodes 3 are uniformly distributed on the device base 1 in a pasting mode, adjacent electroosmosis cathodes 3 are separated through insulating strips 4, and the thickness of the insulating strips 4 is 0.1cm;
the electroosmosis cathode 3 is provided with a square hole at the center, a thin metal sheet 6 is arranged at the upper part of the hole, a resistance strain gauge 7 is arranged below the thin metal sheet 6, a flexible insulating pad 8 is arranged below the resistance strain gauge 7, the resistance strain gauge 7 is wrapped, and a square groove with the same width is formed in the corresponding position of the device base 1 to accommodate the resistance strain gauge 7 and the flexible insulating pad 8;
the hard insulating base 5 is made of hydrophobic material, the section of the hard insulating base is trapezoid, and the hard insulating base is arranged at the upper part of the electroosmosis cathode 3 and distributed in a ring shape; the hard insulating base 5 can avoid short circuit between the electroosmosis anode 2 and the electroosmosis cathode 3 caused by more water accumulated at the electroosmosis cathode 3 in the electroosmosis process;
the electroosmosis anode 2 is stuck on the hard insulating base 5 and is also distributed in a ring shape;
the controller 9 is arranged on the pull rod 11; the controller 9 is provided with a power connector 10 for connecting an input direct current power supply;
the pull rod 11 is provided with a groove at the tail part, and the groove wall is provided with a hole for arranging a bolt 14 for connecting with a tension measuring device.
Further, the controller 9 is provided with a power output port 12 and a signal receiving port 13, the signal receiving port 13 is connected with the resistance strain gauge 7 by using a wire, and the power output port 12 is connected with the electroosmosis anode 2 and the electroosmosis cathode 3;
the electroosmosis anode 2 of each partition is provided with a lead which passes through the hard insulating base 5 at any point and is connected with the positive electrode of the power output port 12;
the electroosmosis cathode 3 of each partition is provided with a lead downwards at any point thereof and is connected with the cathode of the power output port 12;
the zonal electroosmosis viscosity reduction test method for the strain control type between the soil body and the metal interface adopts the zonal electroosmosis viscosity reduction test device for the strain control type between the soil body and the metal interface for test, and comprises the following steps:
step 1: the power connector 10 is connected with a power supply, so that the thin metal sheet 6 is not affected by pressure, and the power output port 12 does not output current;
step 2: applying normal pressure to the pull rod 11 to enable the device to be in contact with a test soil body, after the device is pressed, the thin metal sheet 6 deforms, the resistance strain gauge 7 transmits the measured strain to the controller 9, the controller 9 judges the pressure of each partition according to strain feedback, and controls the output voltage so that the device stands on the soil body to perform electroosmosis;
step 3: after standing for t min, normal pulling force is applied to the pull rod 11 to pull the device out of the soil body, the thin metal sheet 6 deforms in the pulling process, the resistance strain sheet 7 transmits the measured strain to the controller 9, the controller 9 judges the pressure of each partition according to strain feedback, and the output voltage is controlled until the device is not affected by soil body adhesion after being pulled out completely, and electroosmosis is finished.
The principles and embodiments of the present invention have been described with reference to specific examples, which are provided herein to facilitate understanding of the methods and core concepts of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the invention in view of the above.
Claims (2)
1. The zoned electroosmosis viscosity reduction test method for the strain control type between the soil body and the metal interface is characterized by adopting the zoned electroosmosis viscosity reduction test device for the strain control type between the soil body and the metal interface for test and comprising the following steps:
step 1: the power connector (10) is connected with a power supply, so that the thin metal sheet (6) is not affected by pressure, and the power output port (12) does not output current;
step 2: applying normal pressure to the pull rod (11) to enable the device to be in contact with a test soil body, after the device is pressed, the thin metal sheet (6) deforms, the resistance strain sheet (7) transmits the measured strain to the controller (9), and the controller (9) judges the pressure of each partition according to strain feedback and controls the output voltage so as to enable the device to stand on the soil body for electroosmosis;
step 3: after standing for t min, applying normal pulling force to the pull rod (11) to pull the device out of the soil body, wherein in the pulling process, the thin metal sheet (6) deforms, the resistance strain gauge (7) transmits the measured strain to the controller (9), the controller (9) judges the pressure of each partition according to strain feedback, and the output voltage is controlled until the device is not affected by the soil body adhesion force any more after the device is completely pulled out, and electroosmosis is finished;
the electroosmosis viscosity reduction test device comprises a device base (1), an electroosmosis anode (2), an electroosmosis cathode (3), an insulating strip (4), a hard insulating base (5), a thin metal sheet (6), a resistance strain gauge (7), a flexible insulating pad (8), a controller (9), a power connector (10), a pull rod (11), a power output port (12), a signal receiving port (13) and a bolt (14);
the side length of the device base (1) is 9.2cm, the thickness of the device base is 1cm, the device base is used for fixing electroosmosis cathodes (3) of different partitions at the upper part, and the center position of the lower part is connected with a pull rod (11) through a bolt (14);
the electroosmosis cathodes (3) are 2-3 cm in side length and are arranged on the upper part of the device base (1), 9 electroosmosis cathodes (3) are uniformly distributed on the device base (1) in a pasting mode, adjacent electroosmosis cathodes (3) are separated through insulating strips (4), and the thickness of the insulating strips (4) is 0.1cm;
the electroosmosis cathode (3) is provided with a square hole at the center, a thin metal sheet (6) is arranged at the upper part of the hole, a resistance strain gauge (7) is arranged under the thin metal sheet (6), a flexible insulating pad (8) is arranged under the resistance strain gauge (7), the resistance strain gauge (7) is wrapped, a square groove with the same width is formed in the corresponding position of the device base (1), and the resistance strain gauge (7) and the flexible insulating pad (8) are accommodated;
the hard insulating base (5) is made of a hydrophobic material, the section of the hard insulating base is trapezoid, and the hard insulating base is arranged at the upper part of the electroosmosis cathode (3) and distributed in an annular shape; the hard insulating base (5) is arranged to avoid short circuit between the electroosmosis anode (2) and the electroosmosis cathode (3) caused by more water gathered at the electroosmosis cathode (3) in the electroosmosis process;
the electroosmosis anode (2) is stuck on the hard insulating base (5) and is also distributed in a ring shape;
the controller (9) is arranged on the pull rod (11); a power connector (10) is arranged on the controller (9) and is used for being connected with an input direct current power supply;
the pull rod (11) is provided with a groove at the tail part, and a bolt (14) is arranged on the groove wall opening for connecting with the tension measuring device.
2. The test method according to claim 1, characterized in that the controller (9) is provided with a power output port (12) and a signal receiving port (13), the signal receiving port (13) is connected with the resistance strain gauge (7) by using a wire, and the power output port (12) is connected with the electroosmosis anode (2) and the electroosmosis cathode (3);
the electroosmosis anode (2) of each partition is downwards provided with a wire at any point thereof, penetrates through the hard insulating base (5) and is connected with the positive electrode of the power output port (12);
the electroosmosis cathode (3) of each partition is downwards provided with a lead at any point of the electroosmosis cathode and is connected with the cathode of the power output port (12).
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112405834B (en) * | 2020-11-13 | 2022-04-05 | 景德镇陶瓷大学 | Bionic electroosmosis structure for pug mill |
| CN114397337B (en) * | 2022-01-29 | 2023-11-07 | 江苏徐工工程机械研究院有限公司 | Soil adhesion testing device and method |
| CN114739708B (en) * | 2022-03-07 | 2024-07-12 | 西安建筑科技大学 | Simulated shield tunneling test equipment for researching electroosmosis viscosity reduction and research method |
| CN116203103B (en) * | 2023-03-10 | 2023-11-03 | 中国矿业大学 | Test device for reducing cohesive soil adhesiveness by electroosmosis method |
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| SU1712859A1 (en) * | 1988-05-19 | 1992-02-15 | Специальное конструкторско-технологическое бюро Морского гидрофизического института АН УССР | Electrochemical gas analyzer |
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| CN207703767U (en) * | 2018-01-16 | 2018-08-07 | 西安建筑科技大学 | A kind of soil electric osmose experimental provision |
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| US5192413A (en) * | 1987-04-13 | 1993-03-09 | Fuji Electric Co., Ltd. | Electroosmotic dewaterer |
| SU1712859A1 (en) * | 1988-05-19 | 1992-02-15 | Специальное конструкторско-технологическое бюро Морского гидрофизического института АН УССР | Electrochemical gas analyzer |
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