CN105372130A - Temperature control-type high suction unsaturated soil consolidation apparatus - Google Patents
Temperature control-type high suction unsaturated soil consolidation apparatus Download PDFInfo
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- CN105372130A CN105372130A CN201510893739.4A CN201510893739A CN105372130A CN 105372130 A CN105372130 A CN 105372130A CN 201510893739 A CN201510893739 A CN 201510893739A CN 105372130 A CN105372130 A CN 105372130A
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Abstract
The invention discloses a temperature control-type high suction unsaturated soil consolidation apparatus, and belongs to the soil test technology in the field of geotechnical engineering. A specimen to be measured (00) is included, and the apparatus is provided with a suction control device (10), a temperature control device (20), a pressure chamber (30) and a loading device (40). The specimen (00) is arranged in the pressure chamber (30); the pressure chamber (30) is placed in the temperature control device (20); the suction control device (10) is connected to the pressure chamber (30) through a pipe, and controls the suction of the pressure chamber (30); and the loading device (40) is connected to the pressure chamber (30), and provides pressure to the specimen (00). The invention adopts a relative humidity control technology to realize suction control in a high suction range; the high pressure loading device is used for the realization of the high pressure loading; and the temperature control device is employed to realize the temperature control. The apparatus has the advantages of simple principle of suction control, easiness to operate, convenience for installation and measurement and strong practicability, and is applicable to unsaturated soil test under the conditions of high pressure and controlled temperature and controlled humidity.
Description
Technical field
The present invention relates to the soil test technique in Geotechnical Engineering field, particularly relate to a kind of Temperature Control Type height suction unsaturated soil consolidometer.
Specifically, according to concrete engineering situation, test the compressibility coefficient that unsaturated soil in different temperature environments is in high suction section, the deformation characteristic of high suction section unsaturated soil under research condition of different temperatures.
Background technology
Unsaturated soil is widely distributed, can produce distortion, impact engineering structures such as various side slope, roadbeds in drying and watering cycle and load-bearing process.Particularly unsaturated expansive soil, under unsaturated state, suction is higher, can produce obvious impact to soil deformation.In addition, in recent years in the dark geological disposal storehouse of high radioactive nucleus waste, the high-pressure solid bentonitic clay as padded coaming is subject to the impact of high temperature, high pressure and high suction for a long time.Therefore, under research different temperatures, in high suction situation, the alternating compression characteristic of unsaturated soil is significant.
Existing unsaturated soil consolidometer generally adopts axial translation technology controlled suction, and suction range of control is the highest can only arrive 1500kPa, only can measure the deformation characteristic under bargain-hunting power condition, can not meet the requirement of high suction situation far away, and the suction equalization time is long.It is more loaded down with trivial details that the high suction unsaturated soil consolidometer adopting vapor equalization method to improve all must change solution under every one-level suction, there is the problem that equilibration time is very long equally.Therefore need a kind of easy device providing high suction to control, and control to provide temperature to control.Through retrieval, pertinent instruments and method have not been reported.
Summary of the invention
Object of the present invention is just the shortcoming and defect overcoming traditional unsaturated soil consolidometer, provides a kind of Temperature Control Type height suction unsaturated soil consolidometer, becomes the experimental study of characteristic for soil body body under high suction, high pressure and hot conditions.
Technical scheme of the present invention is:
This consolidometer comprises measurand---sample;
Be provided with device for controlling sucking force, temperature control equipment, pressure chamber and charger;
Sample is placed in pressure chamber;
Pressure chamber is placed in temperature control equipment;
Device for controlling sucking force by tubes connection to pressure chamber, controlled pressure room suction;
Charger is connected with pressure chamber, provides pressure to sample.
Compared with prior art, the present invention has following outstanding advantages and beneficial effect:
1. adopt relative humidity control technology, the suction achieved in high suction force range controls, and in process of the test, suction controls simple, and applying suction force level can control, and substantially reduces the unsaturated soil testing time;
2. adopt high pressure charger, achieve high pressure and load;
3. adopt temperature control equipment, achieve temperature and control, can be used for the impact that research temperature becomes the unsaturation soil body;
In a word, controlled suction principle of the present invention is simple, easy and simple to handle, and installation testing is convenient, practical, is applicable to high-pressure temperature control control and wets unsaturated soil testing under condition.
Accompanying drawing explanation
Fig. 1 is the structural representation of this consolidometer;
Fig. 2 is the structural representation of device for controlling sucking force;
Fig. 3 is the structural representation of relative humidity controller;
Fig. 4 is the structural representation of temperature control equipment;
The structural representation of Tu5Shi pressure chamber;
Fig. 6 is the structural representation of pressure chamber base.
In figure:
00-sample;
10-device for controlling sucking force,
11-computerized control system,
12-ultrasonic humidifier,
121-power circuit, 122-blower fan, 123-oscillatory circuit, 124-transducer,
13-dry source of the gas,
131-air compressor, 132-reduction valve, 133-exsiccator, 134-drying agent,
14-the first gas bottle, the 15-the 2 gas bottle, the 16-the 3 gas bottle,
S1-the 1st Temperature Humidity Sensor, S2-the 2nd Temperature Humidity Sensor;
20-temperature control equipment,
21-temperature control liquid, 22-calibration cell, 23-water-circulating pump,
24-ball valve,
25-temperature controller,
251-heating arrangement, 252-thermocouple temperature sensor;
30-pressure chamber,
31-annular cover plate,
32-base,
321 base air admission holes, 322-base venthole, 323-base convolution groove, 324-base threaded hole (; )
33-sample chamber,
34-sample cap,
343-sample cap air admission hole, 344-sample cap venthole;
35-piston load bar, 36-fastening bolt, 37-top permeable stone,
38-bottom permeable stone, 39-O RunddichtringO;
40-charger,
41-digital display dial gauge.
V1, V2-1st, 2 pressure control valves, V3, V4-1st, 2 T-valve,
S1, S2-1st, 2 Temperature Humidity Sensors, C1, C2-1st, 2 conduits.
Embodiment
Describe in detail below in conjunction with drawings and Examples:
One, the structure of consolidometer
1, overall
As Fig. 1, this consolidometer comprises measurand---sample 00;
Be provided with device for controlling sucking force 10, temperature control equipment 20, pressure chamber 30 and charger 40;
Sample 00 is placed in pressure chamber 30;
Pressure chamber 30 is placed in temperature control equipment 20;
Device for controlling sucking force 10 by tubes connection to pressure chamber 30, controlled pressure room 30 suction;
Charger 40 is connected with pressure chamber 30, provides pressure to sample 00.
2, functional part
0) sample 00
Sample 00 is undisturbed, compacting sample, hits full pattern or mud sample.
1) device for controlling sucking force 10
As Fig. 2, device for controlling sucking force 10 comprises computerized control system 11, ultrasonic humidifier 12, dry source of the gas the 13,1st gas bottle the 14,2nd gas bottle the 15,3rd gas bottle the 16,1st humiture probe S1, the 2nd humiture probe S2 and conduit;
Its annexation is:
Ultrasonic humidifier 12 is communicated with the 1st gas bottle 14 respectively with dry source of the gas 13,1st gas bottle 14, the 2nd gas bottle 15, pressure chamber 30 are communicated with successively with the 3rd gas bottle 16,1st humiture probe S1 inserts in the 2nd gas bottle 15, and the 2nd humiture probe S2 inserts in the 3rd gas bottle 16;
Computerized control system 11 is connected with ultrasonic humidifier 12, dry source of the gas 13, the 1st humiture probe S1 and the 2nd humiture probe S2 respectively, carries out suction control to system.
The working mechanism of device for controlling sucking force 10 is:
By ultrasonic humidifier 12 and dry source of the gas 13 obtain and in the 1st gas bottle 14, produce the dry humid gas of certain relative humidity after mixing, flow into the 2nd gas bottle the 15,1st humiture probe S1 monitor the relative humidity in the 2nd gas bottle 15 and feed back to ultrasonic humidifier 12 and the dry humid gas ratio of dry source of the gas 13 control generation by computerized control system 11; Produce the gas of required relative humidity after dry humid gas mixing, relative humidity range of control can from dry gas 0 to complete wet gas 100%; The gas of the controlled humidity produced in the 2nd gas bottle 15 is by the 1st conduit C1 feed pressure room 30, the 3rd gas bottle 16 is flowed into by the 2nd conduit C2 after circulation in pressure chamber 30,2nd Temperature Humidity Sensor S2 is placed in the 3rd gas bottle 16, is monitored by pressure chamber 30 gas relative humidity by computerized control system 11.
(1) ultrasonic humidifier 12
As Fig. 3, ultrasonic humidifier 12 has off-the-shelf, is made up of power circuit 121, blower fan 122, oscillatory circuit 123 and transducer 124.
Its working mechanism is: utilize the intrinsic supersonic oscillations feature of piezoelectric ceramics, produced by certain oscillation frequency and piezoelectric ceramics natural mode shape and resonate, just directly the liquid mist contacted with piezoelectric ceramics can be changed into the molecule of 1-5 micron, and then produce the gas of certain relative humidity, flow via a conduit in the 1st gas bottle 14, the humidity in domination set gas cylinder.
(2) dry source of the gas 13
As Fig. 3, dry source of the gas 13 has off-the-shelf, is made up of air compressor machine 131, reduction valve 132, exsiccator 133 and drying agent 134.
Its working mechanism is: drying agent 134 adopts discolour silica gel, au bleu under drying regime, and after water suction, pulverize is red; The air that air compressor machine 131 produces reduces pressure via reduction valve 132 and in the dry rear inflow of exsiccator 133 first gas bottle 14, provides dry air.
2) temperature control equipment 20
As Fig. 4, temperature control equipment 20 comprises temperature control liquid 21, calibration cell 22, water-circulating pump 23, ball valve 24, heating arrangement 25, and heating arrangement 25 comprises thermocouple temperature sensor 251 and temperature controller 252;
Its annexation is: be built-in with temperature control liquid 21 at calibration cell 22, two, left and right bottom calibration cell 22 is respectively arranged with water-circulating pump 23 and ball valve 24, and thermocouple temperature sensor 251 and the temperature controller 252 of heating arrangement 25 are placed in calibration cell 22 respectively.
Its working mechanism is:
Calibration cell 22 is a kind of rectangular tanks, adopts polystyrene foam to be incubated, avoids thermal loss, improve control accuracy;
Thermocouple temperature sensor 251 and temperature controller 252 control the temperature of calibration cell 22 temp liquid 21, and temperature control scope is 25-90 DEG C, precision 0.5 DEG C;
Water-circulating pump 23 circulates for calibration cell 22 temp liquid 21, and then makes homogeneous temperature;
Ball valve 24 water supply and sewage.
3) pressure chamber 30
As Fig. 5,6, pressure chamber 30 adopts the stainless steel that wearing quality is good and rigidity is large to make, and comprises annular cover plate 31, base 32, sample chamber 33, sample cap 34, piston load bar 35, fastening bolt 36, top permeable stone 37, bottom permeable stone 38 and O RunddichtringO 39;
Its annexation is:
From top to bottom, annular cover plate 31, sample chamber 33 are connected by fastening bolt 36 successively with base 32, between and sealed by O RunddichtringO 39, prevent soft air from overflowing from sample chamber 33;
In sample chamber 33, from top to bottom, piston load bar 35, sample cap 34, top permeable stone 37, sample 00, bottom permeable stone 38 are connected successively with base 32;
Sample cap 34 is a kind of metal nahlocks, is provided with the sample cap air admission hole 343 and sample cap venthole 344 that are communicated with successively
Base 32 is a kind of metal nahlocks, is provided with connection base air admission hole 321, base convolution groove 323 and base venthole 322,4 base threaded hole 324 successively and is evenly arranged at nahlock circumferentially;
Device for controlling sucking force 10 connects base air admission hole 321 and sample cap air admission hole 343 by the 1st conduit C1, and base venthole 322 and sample cap venthole 344 are connected into the 3rd gas bottle 16 by the 2nd conduit C2, provide soft air to sample 00.
4) charger 40
As Fig. 1, charger 40 is a kind of lever chargers, is connected, is also vertically connected with digital display with piston load bar 35
Clock gauge 41, applies certain consolidation pressure to sample 00 and monitors sample vertical deformation.
Digital display dial gauge 41: range is 0-12.7mm, precision is 0.001mm.
Two, test method
Embodiment one:
By the sample 00(undisturbed, the compacting sample that make, hit full pattern, mud sample) put into pressure chamber 30, according to Fig. 2, base 32, bottom permeable stone 38, O RunddichtringO 39, sample 00, top permeable stone 37, sample lid 34, sample chamber 33, annular cover plate 31 are pressed by pressure chamber 30, piston load bar 35 assembles successively; The suction of 0 to 1000MPa is provided to pressure chamber 30 by device for controlling sucking force 10, different suction force level can be set as required, carry out the wetting-drying test under normal loading condition and the consolidation test under normal suction condition.
Embodiment two:
Sample 00 is installed by embodiment one, by device for controlling sucking force 10 controlled pressure room 30 inner suction, apply certain pressure to sample 00 by charger 40, after sample 00 stabilization, under the condition of constant suction and constant pressure, by temperature control equipment 20 to sample 00 for the temperature of 25-95 DEG C, different temperature grade can be set as required and carry out wetting-drying test under temperature controlled condition and consolidation test.
Claims (5)
1. a Temperature Control Type height suction unsaturated soil consolidometer, comprises measurand---sample (00);
It is characterized in that:
Be provided with device for controlling sucking force (10), temperature control equipment (20), pressure chamber (30) and charger (40);
Sample (00) is placed in pressure chamber (30);
Pressure chamber (30) is placed in temperature control equipment (20);
Device for controlling sucking force (10) by tubes connection to pressure chamber (30), controlled pressure room (30) suction;
Charger (40) is connected with pressure chamber (30), provides pressure to sample (00).
2., by Temperature Control Type height suction unsaturated soil consolidometer according to claim 1, it is characterized in that:
Described device for controlling sucking force (10) comprises computerized control system (11), ultrasonic humidifier (12), dry source of the gas (13), the 1st gas bottle (14), the 2nd gas bottle (15), the 3rd gas bottle (16), the 1st humiture probe (S1), the 2nd humiture probe (S2) and conduit;
Its annexation is:
Ultrasonic humidifier (12) and dry source of the gas (13) are communicated with the 1st gas bottle (14) respectively, 1st gas bottle (14), the 2nd gas bottle (15), pressure chamber (30) are communicated with successively with the 3rd gas bottle (16), 1st humiture probe (S1) is placed in the 2nd gas bottle (15), and the 2nd humiture probe (S2) is placed in the 3rd gas bottle (16);
Computerized control system (11) is connected with ultrasonic humidifier (12), dry source of the gas (13), the 1st humiture probe (S1) and the 2nd humiture probe (S2) respectively, carries out suction control to system.
3., by Temperature Control Type height suction unsaturated soil consolidometer according to claim 1, it is characterized in that:
Described temperature control equipment (20) comprises temperature control liquid (21), calibration cell (22), water-circulating pump (23), ball valve (24), heating arrangement (25), and heating arrangement (25) comprises thermocouple temperature sensor (251) and temperature controller (252);
Its annexation is: be built-in with temperature control liquid (21) at calibration cell (22), be respectively arranged with water-circulating pump (23) and ball valve (24) at two, left and right of calibration cell (22) bottom, thermocouple temperature sensor (251) and the temperature controller (252) of heating arrangement (25) are placed in calibration cell (22) respectively.
4., by Temperature Control Type height suction unsaturated soil consolidometer according to claim 1, it is characterized in that:
Described pressure chamber (30) comprises annular cover plate (31), base (32), sample chamber (33), sample cap (34), piston load bar (35), fastening bolt (36), top permeable stone (37), bottom permeable stone (38) and O RunddichtringO (39);
Its annexation is:
From top to bottom, annular cover plate (31), sample chamber (33) are connected by fastening bolt (36) successively with base (32), between and by O RunddichtringO (39) sealing, prevent soft air from overflowing from sample chamber 33;
In sample chamber 33, from top to bottom, piston load bar (35), sample cap (34), top permeable stone (37), sample (00), bottom permeable stone (38) are connected successively with base 32;
Described sample cap (34) is a kind of metal nahlock, is provided with the sample cap air admission hole (343) and sample cap venthole (344) that are communicated with successively;
Described base (32) is a kind of metal nahlock, and be provided with and be communicated with base air admission hole (321), base convolution groove (323) and base venthole (322) successively, 4 base threaded hole (324) are evenly arranged at nahlock circumferentially;
Device for controlling sucking force (10) connects base air admission hole (321) and sample cap air admission hole (343) by the 1st conduit (C1), base venthole (322) and sample cap venthole (344) are connected into the 3rd gas bottle (16) by the 2nd conduit (C2), provide dry soft air to sample (00).
5., by Temperature Control Type height suction unsaturated soil consolidometer according to claim 1, it is characterized in that:
Described charger (40) is a kind of lever charger, is connected with piston load bar (35), is also vertically connected with digital display dial gauge (41), applies certain consolidation pressure and monitor the vertical deformation of sample (00) to sample (00).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510893739.4A CN105372130B (en) | 2015-12-08 | 2015-12-08 | The high suction unsaturated soil consolidation apparatus of Temperature Control Type |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510893739.4A CN105372130B (en) | 2015-12-08 | 2015-12-08 | The high suction unsaturated soil consolidation apparatus of Temperature Control Type |
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| CN105372130B CN105372130B (en) | 2018-04-10 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107340333A (en) * | 2017-08-01 | 2017-11-10 | 华侨大学 | Three-dimensional large power supersonic control bubbles silt consolidation pilot system and its method |
| CN107621534A (en) * | 2017-11-03 | 2018-01-23 | 北京交通大学 | The device of expansive force is measured under isoperibol |
| CN108717014A (en) * | 2018-05-30 | 2018-10-30 | 浙江大学宁波理工学院 | Water recycles temperature control one-dimensional consolidation instrument |
| CN109406301A (en) * | 2018-12-20 | 2019-03-01 | 新疆维吾尔自治区交通规划勘察设计研究院 | Combined indoor consolidates boxshear apparatus |
| CN110389100A (en) * | 2019-08-21 | 2019-10-29 | 桂林理工大学 | Temperature Control Type permeameter and its experimental method |
| CN111504793A (en) * | 2020-04-23 | 2020-08-07 | 中南大学 | Device and method for measuring saturated and unsaturated strength of polluted soil body |
| CN113125274A (en) * | 2021-05-17 | 2021-07-16 | 西南交通大学 | Rock internal capillary action fluctuation test device and method under suction control |
| CN113702418A (en) * | 2021-07-14 | 2021-11-26 | 浙江工业大学 | Temperature control type saturated soil consolidation apparatus |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340333A (en) * | 2017-08-01 | 2017-11-10 | 华侨大学 | Three-dimensional large power supersonic control bubbles silt consolidation pilot system and its method |
| CN107340333B (en) * | 2017-08-01 | 2023-04-07 | 华侨大学 | Three-dimensional high-power ultrasonic control consolidation test system and method for bubble-containing sludge |
| CN107621534A (en) * | 2017-11-03 | 2018-01-23 | 北京交通大学 | The device of expansive force is measured under isoperibol |
| CN108717014A (en) * | 2018-05-30 | 2018-10-30 | 浙江大学宁波理工学院 | Water recycles temperature control one-dimensional consolidation instrument |
| CN109406301A (en) * | 2018-12-20 | 2019-03-01 | 新疆维吾尔自治区交通规划勘察设计研究院 | Combined indoor consolidates boxshear apparatus |
| CN109406301B (en) * | 2018-12-20 | 2024-04-26 | 新疆维吾尔自治区交通规划勘察设计研究院 | Combined indoor consolidation shearing instrument |
| CN110389100A (en) * | 2019-08-21 | 2019-10-29 | 桂林理工大学 | Temperature Control Type permeameter and its experimental method |
| CN111504793A (en) * | 2020-04-23 | 2020-08-07 | 中南大学 | Device and method for measuring saturated and unsaturated strength of polluted soil body |
| CN111504793B (en) * | 2020-04-23 | 2021-06-15 | 中南大学 | Device and method for measuring saturated and unsaturated strength of polluted soil body |
| CN113125274A (en) * | 2021-05-17 | 2021-07-16 | 西南交通大学 | Rock internal capillary action fluctuation test device and method under suction control |
| CN113702418A (en) * | 2021-07-14 | 2021-11-26 | 浙江工业大学 | Temperature control type saturated soil consolidation apparatus |
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