CN105486589B - The vacuum consolidation testing device of three Spindle Status lower unit soil samples - Google Patents
The vacuum consolidation testing device of three Spindle Status lower unit soil samples Download PDFInfo
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- CN105486589B CN105486589B CN201511002368.2A CN201511002368A CN105486589B CN 105486589 B CN105486589 B CN 105486589B CN 201511002368 A CN201511002368 A CN 201511002368A CN 105486589 B CN105486589 B CN 105486589B
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- soil sample
- outer barrel
- vacuum
- inner cylinder
- pressure sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
Abstract
The invention discloses a kind of vacuum consolidation testing device of three Spindle Status lower unit soil sample,Liquid is injected with outer barrel,Confined pressure pressure sensor is provided with cavity between outer barrel and inner cylinder,Liquid-tight envelope at the cooperation of base and top cover and outer barrel,Inner cylinder is provided with outer barrel,Soil sample is provided with inner cylinder,Pore water pressure sensor is provided with soil sample,Drainpipe is provided with soil sample,Drainpipe side offers through hole,Inner cylinder lower end is provided with outer barrel pedestal,The upper end of inner cylinder is provided with piston plate,Lifting shaft is connected with piston plate,Lifting shaft is upward through top cover,Lifting shaft upper end is provided with pressing plate,Main shaft upper end is provided with sedimentometer,Supercharging device is connected with pressurized hole,Drainpipe upper end is connected by vacuum lead with vacuum extractor,The inlet channel turned on drain bar is offered on base,Inlet channel is connected with outside water inlet,Intake pressure sensor is provided with inlet channel.Experimental rig provided by the invention can complete soil sample pore water pressure change experiment under vacuum preloading, soil sample settling test, and every experiment in the case of preloading, the experimental rig and can be also used for drain bar water-flowing amount testing experiment.
Description
Technical field
The present invention relates to a kind of vacuum consolidation testing device of three Spindle Status lower unit soil sample, more particularly to fixed vacuum
The experimental study of the lower soil sample interstitial hydraulic pressure using during circular drainpipe..
Background technology
Before making the present invention, it is very immature for the vacuum consolidation testing device of three Spindle Status lower unit soil samples, experiment dress
Put and only include vacuum pressure system, confined pressure pore pressure monitoring system and settlement monitoring three parts.Most of indoor soil body model of element
Experiment is mainly reversed in dynamic triaxial apparatus, hollow cylinder and carried out in the equipment such as instrument.The research object of these experiments is all soil sample, is passed through
Characteristic of the soil sample cell cube under experimental enviroment is analyzed, studies mechanical characteristic and deformation rule under vacuum preloading effect indirectly.
This research technique is more indirect, and experimental condition is ideal.Also different with soil sample actual conditions, which results in experiment to grind
Studying carefully result and measured result has bigger difference.Meanwhile many parameters also can not be monitored and observed.
In a word, the vacuum consolidation test research for three Spindle Status lower unit soil samples is seldom, is especially a lack of soil sample and exists
The research of particle movement and pore pressure change under vacuum preloading, but this exactly studies soil sample settlement law, consolidates for the soil body
Knot provides the key point of scientific basis.
The content of the invention
In view of insufficient existing for background technology, the technical problems to be solved by the invention are to provide a kind of three Spindle Status and placed an order
The vacuum consolidation testing device of first soil sample, the experimental rig can more accurately test natural environment of the soil sample in various simulations
In, the soil sample interstitial hydraulic pressure under fixed vacuum.
The present invention is adopted the following technical scheme that to complete：The vacuum consolidation test dress of three Spindle Status lower unit soil samples
Put, including base, main shaft and top cover, outer barrel is provided between base and top cover, liquid, the base and top are injected with outer barrel
Liquid-tight envelope at the cooperation with outer barrel is covered, inner cylinder is provided with the outer barrel, is provided with the cavity between the outer barrel and inner cylinder
Confined pressure pressure sensor, soil sample is provided with inner cylinder, pore water pressure sensor is provided with soil sample, draining is provided with soil sample
Pipe, drainpipe side offer through hole, and the inner cylinder lower end is provided with outer barrel pedestal, and the upper end of the inner cylinder is provided with piston
Plate, lifting shaft is connected with piston plate, lifting shaft is upward through the top cover, and lifting shaft upper end is provided with pressing plate, the main shaft
Upper end is provided with sedimentometer, and the pressing plate is pressed closer downwards on the thimble of sedimentometer, and supercharging is offered on the top cover or outer barrel
Hole, supercharging device is connected with pressurized hole, the drainpipe upper end is connected by vacuum lead with vacuum extractor, the bottom
The inlet channel turned on drainpipe is offered on seat, inlet channel is connected with outside water inlet, the inlet channel
Place is provided with intake pressure sensor；The pore water pressure sensor, intake pressure sensor, confined pressure pressure sensor, increasing
Pressure device and vacuum extractor are connected with PLC and are shown by PLC and controlled.
In the present invention, operator can simulate the soil body confined pressure in true environment by supercharging device, pass through inlet channel
Water filling to simulate the moisture under true environment in the soil body, by PLC receive pore water pressure sensor, intake pressure sensor,
The data of confined pressure pressure sensor, supercharging device and vacuum extractor, by observing the settling height data of sedimentometer, Ran Houjin
Row COMPREHENSIVE CALCULATING, it can obtain soil sample space of the more real soil sample in the natural environment of various simulations, under fixed vacuum
Water pressure.The plant automation degree is higher, and operation is more convenient, is advantageous to various teaching and test operation.
Brief description of the drawings
The present invention has drawings described below：
Fig. 1 is the structural representation of the vacuum consolidation testing device for the three Spindle Status lower unit soil samples that invention provides.
Fig. 2 is the cross-sectional view of the soil sample and drainpipe in the inner cylinder in Fig. 1.
Embodiment
Accompanying drawing illustrates technical scheme and embodiment, further describes embodiment in conjunction with accompanying drawing below
Each relevant details and its operation principle.
Shown in reference picture 1, Fig. 2, the vacuum consolidation testing device of three Spindle Status lower unit soil sample provided by the invention, including
Base 1, main shaft 2 and top cover 3, in order to improve the accuracy of experiment, air level 4 is provided with the base 1, the base 1
Corner is provided with horizontal level screw regulator 5, whether observes base 1 in level by air level 4, is adjusted by reconciling spiral
Base 1 can be transferred to horizontal level by section device 5, and outer barrel 6 is provided between base 1 and top cover 3, liquid is injected with outer barrel 6, described
Base 1 and top cover 3 and liquid-tight envelope at the cooperation of outer barrel 6, inner cylinder 7 are provided with the outer barrel 6, between the outer barrel 6 and inner cylinder 7
Cavity in be provided with confined pressure pressure sensor 8, soil sample 9 is provided with inner cylinder 7, be provided with soil sample 9 pore water pressure sensing
Device 10, in the present embodiment, soil sample 9 loads is arranged at the soil sample 9 in rubber membrane 26, the pore water pressure sensor 10
Side wall, bottom wall and inside, drainpipe 11 are provided with soil sample 9, the side of drainpipe 11 offers through hole, and gas and liquid can lead to
Through hole disengaging is crossed, the lower end of inner cylinder 7 is provided with outer barrel pedestal 12, and the upper end of the inner cylinder 7 is provided with piston plate 13, piston plate
Lifting shaft 14 is connected with 13, lifting shaft 14 is upward through the top cover 3, and the upper end of lifting shaft 14 is provided with pressing plate 15, the master
The upper end of axle 2 is provided with sedimentometer 16, and the pressing plate 15 is pressed closer on the thimble of sedimentometer 16 downwards, on the top cover 3 or outer barrel 6
Pressurized hole 17 is offered, pressurized hole 17 is generally located on top cover 3, and supercharging device 18, supercharging device are connected with pressurized hole 17
18 can be using the Air pressurizer of injection air manner or using the liquid pressurizing apparatus for injecting liquid mode, the row
The upper end of water pipe 11 is connected by vacuum lead 19 with vacuum extractor 20, and vacuum extractor 20 is generally vavuum pump, vacuumizes
Magnetic valve 21 is provided with pipeline 19, magnetic valve 21 is connected with PLC22, and magnetic valve 21 can close after predetermined vacuum level is reached
To fix vacuum, the inlet channel 23 turned on drainpipe 11 is offered on the base 1, inlet channel 23 is with being in outside
Water inlet 24 connect, the hydraulic pressure and output in the soil body, the water inlet can be adjusted by reconciling the water level at water inlet 24
Intake pressure sensor 25 is provided with pipeline 23；The pore water pressure sensor 10, intake pressure sensor 25, confined pressure pressure
Force snesor 8, supercharging device 18 and vacuum extractor 19 are connected with PLC22 and are shown by PLC22 and controlled.
Shown in reference picture 1, in the above-described embodiments, operator can simulate the soil in true environment by supercharging device 18
Body confined pressure, by the water filling of inlet channel 23 to simulate the moisture under true environment in the soil body, pore water pressure is received by PLC22
Sensor 10, intake pressure sensor 25, confined pressure pressure sensor 8, the data of supercharging device 18 and vacuum extractor 19, pass through
The settling height data of sedimentometer 16 are observed, then carry out COMPREHENSIVE CALCULATING, can obtain more real soil sample in various simulations
Soil sample interstitial hydraulic pressure data in natural environment, under fixed vacuum.
Claims (5)
1. a kind of vacuum consolidation testing device of three Spindle Status lower unit soil sample, it is characterized in that：Including base, main shaft and top cover,
Outer barrel is provided between base and top cover, is injected with liquid in outer barrel, liquid-tight envelope at the cooperation of the base and top cover and outer barrel,
Inner cylinder is provided with the outer barrel, confined pressure pressure sensor is provided with the cavity between the outer barrel and inner cylinder, is set in inner cylinder
Soil sample is equipped with, pore water pressure sensor is provided with soil sample, drainpipe is provided with soil sample, drainpipe side offers logical
Hole, the inner cylinder lower end are provided with outer barrel pedestal, and the upper end of the inner cylinder is provided with piston plate, lifting is connected with piston plate
Axle, lifting shaft are upward through the top cover, and lifting shaft upper end is provided with pressing plate, and the main shaft upper end is provided with sedimentometer, described
Pressing plate is pressed closer downwards on the thimble of sedimentometer, and pressurized hole is offered on the top cover or outer barrel, supercharging is connected with pressurized hole
Device, the drainpipe upper end are connected with vacuum extractor by vacuum lead, offer on the base and led with drainpipe
Logical inlet channel, inlet channel are connected with outside water inlet, and intake pressure sensing is provided with the inlet channel
Device；The pore water pressure sensor, intake pressure sensor, confined pressure pressure sensor, supercharging device and vacuum extractor are equal
It is connected with PLC and is shown by PLC and controlled.
2. the vacuum consolidation testing device of three Spindle Status lower unit soil sample according to claim 1, it is characterized in that：The bottom
Air level is provided with seat, the corner of the base is provided with horizontal level screw regulator.
3. the vacuum consolidation testing device of three Spindle Status lower unit soil sample according to claim 1 or 2, it is characterized in that：Institute
State soil sample to load in rubber membrane, the pore water pressure sensor is arranged at side wall, bottom wall and the inside of the soil sample.
4. the vacuum consolidation testing device of three Spindle Status lower unit soil sample according to claim 1 or 2, it is characterized in that：Institute
State and magnetic valve is provided with vacuum lead, magnetic valve is connected with PLC.
5. the vacuum consolidation testing device of three Spindle Status lower unit soil sample according to claim 3, it is characterized in that：It is described to take out
Magnetic valve is provided with vacuum pipe, magnetic valve is connected with PLC.
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| CN201511002368.2A CN105486589B (en) | 2015-12-29 | 2015-12-29 | The vacuum consolidation testing device of three Spindle Status lower unit soil samples |
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| CN201511002368.2A CN105486589B (en) | 2015-12-29 | 2015-12-29 | The vacuum consolidation testing device of three Spindle Status lower unit soil samples |
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| CN105486589A CN105486589A (en) | 2016-04-13 |
| CN105486589B true CN105486589B (en) | 2018-03-20 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954109A (en) * | 2016-04-29 | 2016-09-21 | 温州大学 | Vacuum consolidation test device of unit soil sample under triaxial state |
| CN106018741B (en) * | 2016-05-24 | 2017-11-14 | 山西省交通科学研究院 | A kind of new three axles soil sample body becomes measurement apparatus and measuring method |
| CN106644746A (en) * | 2016-12-07 | 2017-05-10 | 山西省交通科学研究院 | Measurement device and method of consolidation and deformation of soil body under vacuum pre-pressing effect |
| CN107976164A (en) * | 2017-11-16 | 2018-05-01 | 温州大学 | Measure the bath scaled model experimental device and its measuring method of displacement model in high-moisture stream silt particle well consolidation process under vacuum pressure |
| CN109883851B (en) * | 2019-04-03 | 2024-04-16 | 水利部交通运输部国家能源局南京水利科学研究院 | Gas injection-vacuum consolidation test device and method for high-water-content sludge |
| CN110160880A (en) * | 2019-05-16 | 2019-08-23 | 浙江工业大学 | The Vacuum-Heaped United Pre-compressed experimental rig and method of soil sample under a kind of three Spindle Status |
| CN112747983B (en) * | 2020-12-30 | 2022-09-16 | 南京工业大学 | Hollow cylindrical sample preparation device for microorganism solidified sandy soil and use method |
| CN114166645B (en) * | 2022-02-14 | 2022-04-12 | 潍坊学院 | Indoor soil body negative pressure consolidation device |
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| CN105486589A (en) | 2016-04-13 |
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