CN105486589A - Vacuum consolidation test device of unit soil sample under triaxial state - Google Patents
Vacuum consolidation test device of unit soil sample under triaxial state Download PDFInfo
- Publication number
- CN105486589A CN105486589A CN201511002368.2A CN201511002368A CN105486589A CN 105486589 A CN105486589 A CN 105486589A CN 201511002368 A CN201511002368 A CN 201511002368A CN 105486589 A CN105486589 A CN 105486589A
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- soil sample
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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
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a vacuum consolidation test device of a unit soil sample under the triaxial state. Liquid is injected to an outer cylinder; a confining pressure sensor is arranged in a chamber between the outer cylinder and an inner cylinder; the matching positions between a base and the outer cylinder and between a top cover and the outer cylinder are in liquid seal; the inner cylinder is arranged in the outer cylinder; a soil sample is arranged in the inner cylinder; a pore water pressure sensor is arranged on the soil sample; an exhaust water pipe is arranged in the soil sample; a through hole is formed in the side surface of the exhaust water pipe; the lower end of the inner cylinder is provided with an outer cylinder substrate; the upper end of the inner cylinder is provided with a piston plate; the piston plate is connected with a lifting shaft; the lifting shaft upwardly penetrates through the top cover; the upper end of the lifting shaft is provided with a pressure plate; the upper end of a main shaft is provided with a settlement gauge; a pressurizing hole is connected with a pressurizing device; the upper end of the exhaust water pipe is connected with a vacuumizing device through a vacuumizing pipeline; the base is provided with a water inlet pipeline conducted by an exhaust water plate; the water inlet pipeline is connected with the water inlet hole which is at the outer side; and the water inlet pipeline is provided with a water inlet pressure sensor. The test device disclosed by the invention can complete a soil sample pore water pressure change test under vacuum preloading, a soil sample settlement test and various testes under a pile loading condition. The test device disclosed by the invention can also be used for an exhaust water plate discharge capacity test experiment.
Description
Technical field
The present invention relates to a kind of vacuum consolidation testing device of three Spindle Status lower unit soil samples, the experimental study of soil sample interstitial hydraulic pressure when particularly using circular drain bar under fixing vacuum tightness.。
Background technology
Before making the present invention, the vacuum consolidation testing device for three Spindle Status lower unit soil samples is very immature, and test unit only comprises vacuum pressure system, confined pressure hole pressure monitoring system and settlement monitoring three part.The indoor soil body model of element test of major part is mainly reversed on the equipment such as instrument carry out at dynamic triaxial apparatus, hollow cylinder.The research object of these tests is all soil sample, by analyzing the characteristic of soil sample cell cube under experimental enviroment, and the mechanical characteristic indirectly under the effect of research vacuum preloading and deformation rule.This research technique is comparatively indirect, and test condition is ideal.Also different with soil sample actual conditions, which results in experimental study and measured result has bigger difference.Meanwhile, a lot of parameter also cannot be monitored and observe.
In a word, vacuum consolidation test research for three Spindle Status lower unit soil samples is little, especially lack the research of soil sample particle moving and pore pressure change under vacuum preloading, but this studies soil sample settlement law exactly, for soil solidifying provides the key point of scientific basis.
Summary of the invention
In view of the deficiency that background technology exists, technical matters to be solved by this invention is to provide a kind of vacuum consolidation testing device of three Spindle Status lower unit soil samples, and this test unit can test the soil sample interstitial hydraulic pressure of soil sample in the physical environment of various simulation, under fixing vacuum tightness more exactly.
The present invention takes following technical scheme: the vacuum consolidation testing device of three Spindle Status lower unit soil samples, comprise base, main shaft and top cover, urceolus is provided with between base and top cover, liquid is injected with in urceolus, the cooperation place liquid sealing of described base and top cover and urceolus, inner core is provided with in described urceolus, confined pressure pressure transducer is provided with in cavity between described urceolus and inner core, soil sample is provided with in inner core, pore water pressure sensor is provided with in soil sample, drainpipe is provided with in soil sample, drainpipe side opening is provided with through hole, described inner core lower end is provided with urceolus pedestal, the upper end of described inner core is provided with piston plate, piston plate is connected with lifting shaft, lifting shaft is upward through described top cover, lifting shaft upper end is provided with pressing plate, described main shaft upper end is provided with sedimentometer, described pressing plate presses closer downwards on the thimble of sedimentometer, described top cover or urceolus offer pressurized hole, pressurized hole place is connected with supercharging device, described drainpipe upper end is connected with vacuum extractor by vacuum lead, described base offers the inlet channel with drain bar conducting, inlet channel is connected with the water inlet being in outside, described inlet channel place is provided with intake pressure sensor, described pore water pressure sensor, intake pressure sensor, confined pressure pressure transducer, supercharging device and vacuum extractor are all connected with PLC and are undertaken showing and controlling by PLC.
In the present invention, operator can by the soil body confined pressure in supercharging device Reality simulation environment, by inlet channel water filling with the moisture in the soil body under Reality simulation environment, the data of pore water pressure sensor, intake pressure sensor, confined pressure pressure transducer, supercharging device and vacuum extractor are received by PLC, by observing the settling height data of sedimentometer, then carry out COMPREHENSIVE CALCULATING, the soil sample interstitial hydraulic pressure of more real soil sample in the physical environment of various simulation, under fixing vacuum tightness can be obtained.This plant automation degree is higher, more convenient to operate, is conducive to various teaching and test operation.
Accompanying drawing explanation
The present invention has following accompanying drawing:
Fig. 1 is for inventing the structural representation of the vacuum consolidation testing device of the three Spindle Status lower unit soil samples provided.
Fig. 2 is the cross sectional representation of soil sample in the inner core in Fig. 1 and drainpipe.
Embodiment
Drawings illustrate technical scheme of the present invention and embodiment, further describe each details and the principle of work thereof of embodiment below more by reference to the accompanying drawings.
With reference to Fig. 1, shown in Fig. 2, the vacuum consolidation testing device of three Spindle Status lower unit soil samples provided by the invention, comprise base 1, main shaft 2 and top cover 3, in order to improve the accuracy of test, described base 1 is provided with air level 4, the corner of described base 1 is provided with horizontal level screw regulator 5, observe base 1 by air level 4 and whether be in level, base 1 can be transferred to horizontal level by reconciling screw regulator 5, urceolus 6 is provided with between base 1 and top cover 3, liquid is injected with in urceolus 6, the cooperation place liquid sealing of described base 1 and top cover 3 and urceolus 6, inner core 7 is provided with in described urceolus 6, confined pressure pressure transducer 8 is provided with in cavity between described urceolus 6 and inner core 7, soil sample 9 is provided with in inner core 7, pore water pressure sensor 10 is provided with in soil sample 9, in the present embodiment, soil sample 9 loads in rubber diaphragm 26, described pore water pressure sensor 10 is arranged at the sidewall of described soil sample 9, diapire and inside, drainpipe 11 is provided with in soil sample 9, drainpipe 11 side opening is provided with through hole, gas and liquid can be passed in and out by through hole, described inner core 7 lower end is provided with urceolus pedestal 12, the upper end of described inner core 7 is provided with piston plate 13, piston plate 13 is connected with lifting shaft 14, lifting shaft 14 is upward through described top cover 3, lifting shaft 14 upper end is provided with pressing plate 15, described main shaft 2 upper end is provided with sedimentometer 16, described pressing plate 15 presses closer downwards on the thimble of sedimentometer 16, described top cover 3 or urceolus 6 offer pressurized hole 17, pressurized hole 17 is generally arranged on top cover 3, pressurized hole 17 place is connected with supercharging device 18, supercharging device 18 can for adopting the Air pressurizer injecting air manner or the liquid pressurizing apparatus adopting injection liquid mode, described drainpipe 11 upper end is connected with vacuum extractor 20 by vacuum lead 19, vacuum extractor 20 is generally vacuum pump, vacuum lead 19 is provided with solenoid valve 21, solenoid valve 21 is connected with PLC22, solenoid valve 21 can cut out with fixing vacuum tightness after reaching predetermined vacuum level, described base 1 offers the inlet channel 23 with drain bar 11 conducting, inlet channel 23 is connected with the water inlet 24 being in outside, hydraulic pressure in the soil body and output is adjusted by reconciling the water level at water inlet 24 place, described inlet channel 23 place is provided with intake pressure sensor 25, described pore water pressure sensor 10, intake pressure sensor 25, confined pressure pressure transducer 8, supercharging device 18 and vacuum extractor 19 are all connected with PLC22 and are undertaken showing and controlling by PLC22.
With reference to shown in Fig. 1, in the above-described embodiments, operator can by the soil body confined pressure in supercharging device 18 Reality simulation environment, by inlet channel 23 water filling with the moisture in the soil body under Reality simulation environment, pore water pressure sensor 10 is received by PLC22, intake pressure sensor 25, confined pressure pressure transducer 8, the data of supercharging device 18 and vacuum extractor 19, by observing the settling height data of sedimentometer 16, then COMPREHENSIVE CALCULATING is carried out, more real soil sample can be obtained in the physical environment of various simulation, soil sample interstitial hydraulic pressure data under fixing vacuum tightness.
Claims (5)
1. the vacuum consolidation testing device of a Spindle Status lower unit soil sample, it is characterized in that: comprise base, main shaft and top cover, urceolus is provided with between base and top cover, liquid is injected with in urceolus, the cooperation place liquid sealing of described base and top cover and urceolus, inner core is provided with in described urceolus, confined pressure pressure transducer is provided with in cavity between described urceolus and inner core, soil sample is provided with in inner core, pore water pressure sensor is provided with in soil sample, drainpipe is provided with in soil sample, drainpipe side opening is provided with through hole, described inner core lower end is provided with urceolus pedestal, the upper end of described inner core is provided with piston plate, piston plate is connected with lifting shaft, lifting shaft is upward through described top cover, lifting shaft upper end is provided with pressing plate, described main shaft upper end is provided with sedimentometer, described pressing plate presses closer downwards on the thimble of sedimentometer, described top cover or urceolus offer pressurized hole, pressurized hole place is connected with supercharging device, described drainpipe upper end is connected with vacuum extractor by vacuum lead, described base offers the inlet channel with drain bar conducting, inlet channel is connected with the water inlet being in outside, described inlet channel place is provided with intake pressure sensor, described pore water pressure sensor, intake pressure sensor, confined pressure pressure transducer, supercharging device and vacuum extractor are all connected with PLC and are undertaken showing and controlling by PLC.
2. the vacuum consolidation testing device of three Spindle Status lower unit soil samples according to claim 1, it is characterized in that: described base is provided with air level, the corner of described base is provided with horizontal level screw regulator.
3. the vacuum consolidation testing device of three Spindle Status lower unit soil samples according to claim 1 and 2, is characterized in that: described soil sample loads in rubber diaphragm, and described pore water pressure sensor is arranged at the sidewall of described soil sample, diapire and inside.
4. the vacuum consolidation testing device of three Spindle Status lower unit soil samples according to claim 1 and 2, is characterized in that: described vacuum lead is provided with solenoid valve, and solenoid valve is connected with PLC.
5. the vacuum consolidation testing device of three Spindle Status lower unit soil samples according to claim 3, is characterized in that: described vacuum lead is provided with solenoid valve, and solenoid 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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Cited By (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 |
| CN106018741A (en) * | 2016-05-24 | 2016-10-12 | 山西省交通科学研究院 | Novel three-axis soil sample body change measuring device 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 |
| CN109883851A (en) * | 2019-04-03 | 2019-06-14 | 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 testing device and test method for high-moisture percentage mud |
| 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 |
| CN112747983A (en) * | 2020-12-30 | 2021-05-04 | 南京工业大学 | Hollow cylindrical sample preparation device for microorganism solidified sandy soil and use method |
| CN114166645A (en) * | 2022-02-14 | 2022-03-11 | 潍坊学院 | Indoor soil body negative pressure consolidation device |
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Cited By (11)
| 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 |
| CN106018741A (en) * | 2016-05-24 | 2016-10-12 | 山西省交通科学研究院 | Novel three-axis soil sample body change measuring device 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 |
| CN109883851A (en) * | 2019-04-03 | 2019-06-14 | 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 testing device and test method for high-moisture percentage mud |
| 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 |
| CN112747983A (en) * | 2020-12-30 | 2021-05-04 | 南京工业大学 | Hollow cylindrical sample preparation device for microorganism solidified sandy soil and use method |
| 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 |
| CN114166645A (en) * | 2022-02-14 | 2022-03-11 | 潍坊学院 | Indoor soil body negative pressure consolidation device |
| CN114166645B (en) * | 2022-02-14 | 2022-04-12 | 潍坊学院 | Indoor soil body negative pressure consolidation device |
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| CN105486589B (en) | 2018-03-20 |
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