CN109083206A - A kind of test method and device of geotechnical centrifuge simulation Frozen-thawed cycled process - Google Patents
A kind of test method and device of geotechnical centrifuge simulation Frozen-thawed cycled process Download PDFInfo
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- CN109083206A CN109083206A CN201811113433.2A CN201811113433A CN109083206A CN 109083206 A CN109083206 A CN 109083206A CN 201811113433 A CN201811113433 A CN 201811113433A CN 109083206 A CN109083206 A CN 109083206A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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Abstract
The invention discloses the test methods and device of a kind of geotechnical centrifuge simulation Frozen-thawed cycled process, it include model casing, transparent windows, cold and hot lid, measuring system, it choosing test material, production geotechnical model, starting to test after commissioning device: 1) cold and hot cover cap being located on model casing, set the operation G value of geotechnical centrifuge and runing time and opening geotechnical centrifuge；2) circulation opens refrigerating plant, heating combined equipment, passes through the internal temperature of temperature sensor real-time monitoring geotechnical model；3) by measuring system, unstability situation of geotechnical model during circulating freezing resistance is monitored.Test method and device of the invention can be used for studying soil after one or many circulating freezing resistances comprising the change of the stability including soil stress, shape and its changing rule.
Description
Technical field
The invention mainly relates to geotechnical centrifuge test fields, and in particular to a kind of geotechnical centrifuge simulation Frozen-thawed cycled mistake
The test method and device of journey.
Background technique
Geotechnical centrifuge is used for a kind of testing equipment of geotechnical engineering physical simulation experiment.Usually there are drum centrifuge and arm
Formula centrifuge two major classes.The former is chiefly used in soil mechanics research relevant to clayey soil, and model slot can be longer, can be circumferentially
Arrangement；The latter is used for all kinds of ground physical simulation experiments, and the size that model size depends on model casing limits.It is centrifuged using geotechnique
Machine can simulate the stress of prototype earth structure, deformation and failure, verify design scheme, carry out material parameter research, verifying number
It learns model and numerical analysis result, explore new geotechnical engineering physical phenomenon, therefore have in geotechnical engineering field biggish
Application prospect.
Currently, in for the stability study of NORTH CHINA severe cold area freeze-thaw soils, it is difficult to simulate the jelly of soil
Melt environment, and be temporarily related to the indoor model test in the field not yet, especially there are no use geotechnical centrifuge mould
Type test is come the device and method of studying soil stability after Frozen-thawed cycled.
Summary of the invention
The object of the invention is to remedy the disadvantages of known techniques, provides a kind of geotechnical centrifuge simulation Frozen-thawed cycled mistake
The test method and device of journey.
The present invention is achieved by the following technical solutions:
A kind of test method of geotechnical centrifuge simulation Frozen-thawed cycled process, it is characterised in that the following steps are included:
(1) choose test material: the soil in selection area to be checked takes appropriate soil to be sealed with preservative film；
(2) it makes geotechnical model: the soil being sealed being taken out, the geotechnical model of certain shapes is fabricated to, by geotechnical model
It is placed in model casing, geotechnical model is tightly attached in the bottom and side wall of model casing, is embedded with soil at the different depth of geotechnical model
Pressure cell, geotechnical model middle part are embedded with temperature sensor；
(3) commissioning device: model casing is placed in a suspension bucket of geotechnical centrifuge, is put in another suspension bucket of geotechnical centrifuge
Set counterweight；Video camera is respectively set in the transparent observing of model casing outside window, and the shooting angle for adjusting video camera makes it that can take soil
Work model；
(4) start to test: 1) cold and hot cover cap being located on model casing, set the operation G value and runing time of geotechnical centrifuge
And open geotechnical centrifuge；2) circulation opens refrigerating plant, heating combined equipment, passes through temperature sensor real-time monitoring geotechnical model
Internal temperature；Refrigerating plant is first opened, when the temperature monitored reaches preset geotechnical model cryogenic temperature, stops refrigeration,
Heating combined equipment is opened simultaneously, when the temperature monitored reaches preset geotechnical model melt temperature, stops heating, opens simultaneously
Thus refrigerating plant constantly recycles；3) by measuring system, unstability situation of geotechnical model during circulating freezing resistance is monitored.
A kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process, it is characterised in that include:
Model casing, the model casing are mounted in the suspension bucket of geotechnical centrifuge, and model casing is an open body structure in top；
The side wall of transparent windows, the model casing is equipped at least one transparent windows, for soil in observing and nursing case
Freezing-thawing condition；
Cold and hot lid, the lower end surface sealable lid of the cold and hot lid are located at the top of model casing, on the lower end surface of cold and hot lid
Refrigerating plant, heating combined equipment are installed, to be freezed or be melted the soil in model casing；
Measuring system, the measuring system include soil pressure cell, temperature sensor, video camera, are respectively used to acquire geotechnological mould
The real-time status of the real-time soil stress of type, the inside real time temperature of geotechnical model, geotechnical model.
A kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process, it is characterised in that: the cold and hot lid
The lower end surface of body be equipped with thermal insulating plate, the middle part of thermal insulating plate be vertically equipped with a baffle by cold and hot lid be divided into refrigeration area,
Area is heated, the refrigerating plant is mounted on refrigeration area, and heating combined equipment is mounted on heating area.
A kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process, it is characterised in that: the refrigeration dress
It sets to use and be freezed by the refrigerant circuit that refrigeration compressor, evaporator, condenser, expansion valve are constituted.
A kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process, it is characterised in that: the heating dress
It sets using electric heater unit or steam heating combined equipment.
A kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process, it is characterised in that: the electric heating
Device includes electrically heated rod, and the electrically heated rod is evenly arranged on the heating area end face of cold and hot lid.
A kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process, it is characterised in that: the steam system
Thermal includes steam pipe coil, and the steam disc pipe dish is located on the heating end face of cold and hot lid, and one end of steam pipe coil connects
Connect vapour source, other end connection condenser pipe.
A kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process, it is characterised in that: the soil pressure
Box, temperature sensor, video camera signal output end connect respectively with the signal input part of information process unit, information processing list
The signal output end and refrigerating plant of member, heating device control connect.It can be real by the collected temperature information of temperature sensor
The start and stop switching of refrigerating plant, heating device is now automatically controlled, while information process unit collects soil pressure cell, video camera
Information handled, be soil freezing-thawing research as foundation.
The beneficial effects of the present invention are:
Test method and device of the invention can be used for studying soil after one or many circulating freezing resistances comprising
The change of stability including soil stress, shape and its changing rule.
Detailed description of the invention
Fig. 1 is the schematic diagram of experimental rig of the invention.
Fig. 2 is the functional block diagram of this hair invention.
Specific embodiment
As shown in Figure 1, 2, a kind of test method of geotechnical centrifuge simulation Frozen-thawed cycled process, comprising the following steps:
(1) choose test material: the soil in selection area to be checked takes appropriate soil to be sealed with preservative film；
(2) it makes geotechnical model: the soil being sealed being taken out, the geotechnical model 2 of certain shapes is fabricated to, by geotechnical model
It is placed in model casing 1, geotechnical model 2 is tightly attached in the bottom and side wall of model casing 1, is embedded at the different depth of geotechnical model
Soil pressure cell 3, geotechnical model middle part are embedded with temperature sensor 4；
(3) commissioning device: model casing 1 is placed in a suspension bucket of geotechnical centrifuge, in another suspension bucket of geotechnical centrifuge
Place counterweight；Video camera 6 is respectively set outside the transparent windows 5 of model casing 1, the shooting angle of adjustment video camera 6 clap it can
Take the photograph geotechnical model 2；
(4) start to test: 1) cold and hot lid 7 lid being located on model casing 2, when setting the operation G value and operation of geotechnical centrifuge
Between and open geotechnical centrifuge；2) circulation opens refrigerating plant 8, heating combined equipment 9, passes through temperature sensor 4 real-time monitoring geotechnique
The internal temperature of model 2；Refrigerating plant 8 is first opened to stop when the temperature monitored reaches preset geotechnical model cryogenic temperature
Only freeze, while opening heating combined equipment 9, when the temperature monitored reaches preset geotechnical model melt temperature, stops heating,
Refrigerating plant 8 is opened simultaneously, is thus constantly recycled；3) by measuring system, geotechnical model 2 is monitored during circulating freezing resistance
Unstability situation.
A kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process includes:
Model casing 1, the model casing are mounted in the suspension bucket of geotechnical centrifuge, and model casing is an open body structure in top；
The side wall of transparent windows 5, the model casing is equipped at least one transparent windows, for soil in observing and nursing case
Freezing-thawing condition；
The lower end surface sealable lid of cold and hot lid 7, the cold and hot lid 7 is located at the top of model casing 1, the lower end of cold and hot lid 7
Refrigerating plant 8, heating combined equipment 9 are installed, to be freezed or be melted the soil in model casing 1 on face；
Measuring system, the measuring system include soil pressure cell 3, temperature sensor 4, video camera 6, are respectively used to acquisition geotechnique
The real-time status of the real-time soil stress of model 2, the inside real time temperature of geotechnical model, geotechnical model.
The lower end surface of cold and hot lid 7 is equipped with thermal insulating plate 10, and the middle part of thermal insulating plate 10 is vertically equipped with a baffle 11
Cold and hot lid 7 is divided for refrigeration area, heats area, the refrigerating plant 8 is mounted on refrigeration area, and heating combined equipment 9 is mounted on heating area.
Refrigerating plant 8 is using the refrigerant circuit system being made of refrigeration compressor, evaporator, condenser, expansion valve
It is cold.
Heating combined equipment 9 uses electric heater unit or steam heating combined equipment.
Electric heater unit includes electrically heated rod, and the electrically heated rod is evenly arranged in the heating area end face of cold and hot lid
On.
Steam heating combined equipment includes steam pipe coil, and the steam disc pipe dish is located on the heating end face of cold and hot lid, is steamed
One end connection vapour source, the other end of vapour coil pipe connect condenser pipe.
Soil pressure cell 3, temperature sensor 4, the signal output end of video camera 6 are defeated with the signal of information process unit 12 respectively
Enter end connection, the signal output end and refrigerating plant 8 of information process unit 12, the control of heating device 9 connect.It can be passed by temperature
The collected temperature information of sensor realizes the start and stop switching for automatically controlling refrigerating plant, heating device, while information process unit
Soil pressure cell, the collected information of video camera are handled, are the research of soil freezing-thawing as foundation.
Claims (8)
1. a kind of test method of geotechnical centrifuge simulation Frozen-thawed cycled process, it is characterised in that the following steps are included:
(1) choose test material: the soil in selection area to be checked takes appropriate soil to be sealed with preservative film；
(2) it makes geotechnical model: the soil being sealed being taken out, the geotechnical model of certain shapes is fabricated to, by geotechnical model
It is placed in model casing, geotechnical model is tightly attached in the bottom and side wall of model casing, is embedded with soil at the different depth of geotechnical model
Pressure cell, geotechnical model middle part are embedded with temperature sensor；
(3) commissioning device: model casing is placed in a suspension bucket of geotechnical centrifuge, is put in another suspension bucket of geotechnical centrifuge
Set counterweight；Video camera is respectively set in the transparent observing of model casing outside window, and the shooting angle for adjusting video camera makes it that can take soil
Work model；
(4) start to test: 1) cold and hot cover cap being located on model casing, set the operation G value and runing time of geotechnical centrifuge
And open geotechnical centrifuge；
2) circulation opens refrigerating plant, heating combined equipment, passes through the internal temperature of temperature sensor real-time monitoring geotechnical model；First open
Refrigerating plant is opened, when the temperature monitored reaches preset geotechnical model cryogenic temperature, stops refrigeration, while opening heating dress
It sets, when the temperature monitored reaches preset geotechnical model melt temperature, stops heating, while opening refrigerating plant, thus
Constantly circulation；
3) by measuring system, unstability situation of geotechnical model during circulating freezing resistance is monitored.
2. a kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process, it is characterised in that include:
Model casing, the model casing are mounted in the suspension bucket of geotechnical centrifuge, and model casing is an open body structure in top；
The side wall of transparent windows, the model casing is equipped at least one transparent windows, for soil in observing and nursing case
Freezing-thawing condition；
Cold and hot lid, the lower end surface sealable lid of the cold and hot lid are located at the top of model casing, on the lower end surface of cold and hot lid
Refrigerating plant, heating combined equipment are installed, to be freezed or be melted the soil in model casing；
Measuring system, the measuring system include soil pressure cell, temperature sensor, video camera, are respectively used to acquire geotechnological mould
The real-time status of the real-time soil stress of type, the inside real time temperature of geotechnical model, geotechnical model.
3. a kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process according to claim 2, it is characterised in that:
The lower end surface of the cold and hot lid is equipped with thermal insulating plate, and the middle part of thermal insulating plate is vertically equipped with a baffle for cold and hot lid point
For refrigeration area, heating area, the refrigerating plant is mounted on refrigeration area, and heating combined equipment is mounted on heating area.
4. a kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process according to claim 3, it is characterised in that:
The refrigerating plant is used to be freezed by the refrigerant circuit that refrigeration compressor, evaporator, condenser, expansion valve are constituted.
5. a kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process according to claim 3, it is characterised in that:
The heating combined equipment uses electric heater unit or steam heating combined equipment.
6. a kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process according to claim 5, it is characterised in that:
The electric heater unit includes electrically heated rod, and the electrically heated rod is evenly arranged on the heating area end face of cold and hot lid.
7. a kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process according to claim 4, it is characterised in that:
The steam heating combined equipment includes steam pipe coil, and the steam disc pipe dish is located on the heating end face of cold and hot lid, steam disc
One end connection vapour source, the other end of pipe connect condenser pipe.
8. a kind of experimental rig of geotechnical centrifuge simulation Frozen-thawed cycled process according to claim 2, it is characterised in that:
The soil pressure cell, temperature sensor, video camera signal output end connect respectively with the signal input part of information process unit,
The signal output end and refrigerating plant of information process unit, heating device control connect.
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| CN201811113433.2A CN109083206A (en) | 2018-09-25 | 2018-09-25 | A kind of test method and device of geotechnical centrifuge simulation Frozen-thawed cycled process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133219A (en) * | 2019-05-15 | 2019-08-16 | 水利部交通运输部国家能源局南京水利科学研究院 | Soil body freeze thawing is eroded simulating on coupling loading device under a kind of centrifugal field |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142356A (en) * | 2014-06-26 | 2014-11-12 | 水利部交通运输部国家能源局南京水利科学研究院 | Centrifugal simulation system for freeze thawing deformation of water conveyance canal in salty-cold region |
| CN105004654A (en) * | 2015-07-30 | 2015-10-28 | 中铁西北科学研究院有限公司 | Testing machine and method for analogue simulation of freeze-thaw cycle destruction of sandy soil in well mouth of karez and method |
| CN206460045U (en) * | 2016-12-26 | 2017-09-01 | 山西省交通科学研究院 | A kind of side slope model test apparatus simulated under dry and wet and Frozen-thawed cycled effect |
-
2018
- 2018-09-25 CN CN201811113433.2A patent/CN109083206A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142356A (en) * | 2014-06-26 | 2014-11-12 | 水利部交通运输部国家能源局南京水利科学研究院 | Centrifugal simulation system for freeze thawing deformation of water conveyance canal in salty-cold region |
| CN105004654A (en) * | 2015-07-30 | 2015-10-28 | 中铁西北科学研究院有限公司 | Testing machine and method for analogue simulation of freeze-thaw cycle destruction of sandy soil in well mouth of karez and method |
| CN206460045U (en) * | 2016-12-26 | 2017-09-01 | 山西省交通科学研究院 | A kind of side slope model test apparatus simulated under dry and wet and Frozen-thawed cycled effect |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133219A (en) * | 2019-05-15 | 2019-08-16 | 水利部交通运输部国家能源局南京水利科学研究院 | Soil body freeze thawing is eroded simulating on coupling loading device under a kind of centrifugal field |
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