CN108225610A - Suitable for the energy stake centrifugal model experimental provision and application method of drum centrifuge - Google Patents
Suitable for the energy stake centrifugal model experimental provision and application method of drum centrifuge Download PDFInfo
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- CN108225610A CN108225610A CN201810063483.8A CN201810063483A CN108225610A CN 108225610 A CN108225610 A CN 108225610A CN 201810063483 A CN201810063483 A CN 201810063483A CN 108225610 A CN108225610 A CN 108225610A
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- stake
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000002689 soil Substances 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 230000001351 cycling effect Effects 0.000 claims abstract description 11
- 230000002787 reinforcement Effects 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000011888 foil Substances 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 230000008859 change Effects 0.000 claims abstract description 7
- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 230000036760 body temperature Effects 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000012774 insulation material Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- WMGSQTMJHBYJMQ-UHFFFAOYSA-N aluminum;magnesium;silicate Chemical compound [Mg+2].[Al+3].[O-][Si]([O-])([O-])[O-] WMGSQTMJHBYJMQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 6
- 230000010534 mechanism of action Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to Geotechnical Engineering fields, are related to a kind of energy stake centrifugal model experimental provision and application method suitable for drum centrifuge.The device includes energy stake model and measurement system, and energy stake model includes concrete, miniature heat exchanger tube, foil gauge and steel reinforcement cage；Measurement system includes displacement meter, force snesor, miniature soil pressure cell and array of temperature sensor.The present invention effectively controls pile body temperature, realizes cold cycling by setting miniature heat-exchange tube inside energy stake model；Pile body arranges foil gauge, can measure pile strain；Pile peripheral earth lays array of temperature sensor, it can be achieved that measurement to pile peripheral earth temperature change value；Miniature soil pressure cell is arranged in stake side, can measure in experimentation stake week horizontal earth pressure and vertical earth pressure knots modification；Model casing is arranged in drum centrifuge, its mechanism of action is studied in deployable energy stake centrifugal model test.The configuration of the present invention is simple, economic and practical, operability is strong, it is easy to accomplish.
Description
Technical field
The invention belongs to Geotechnical Engineering fields, are related to a kind of centrifugal model experiment of ground-source heat pump system energy piles,
More particularly to a kind of energy stake centrifugal model experimental provision and application method suitable for drum centrifuge.
Background technology
In pile foundation, since single-pile stress feature is mainly influenced by interaction between pile and soil, pile body stress characteristic often makes
It is simulated with linear elasticity.It interacts between feasible simulation Pile Soil, the resistance to shear of soil for reproducing GRAVITY CONTROL is horizontal, for pile foundation model
Experiment is of great significance.The basic principle of centrifugal model experiment is that geotechnical model is placed in high-speed rotating centrifuge, is made
Bear higher centrifugal acceleration, to compensate the loss of the gravity caused by model scale.With soil test technique
Fast development, centrifugal model test the important means for having become pile foundation research.
Ground source heat pump technology is a kind of novel energy-saving emission-reducing technology using geothermal source, for improving traditional petrochemical industry
Energy resource structure promotes the development of society to be of great significance.The technology is not occurred using geothermal source temperature with season substantially
The characteristic of change flows upper building by liquid in heat exchanger tube and energy exchange occurs for geothermal source, so as to reach
To refrigeration or the purpose of heating.Heat exchanger tube and conventional concrete bored concrete pile are organically combined, the novel pile basis formed is
Energy stake.Energy stake has both pile foundation and earth source heat pump effect, can undertake top-out load and improve earth source heat pump
Heat exchange efficiency, while cost can also be greatly lowered, solve the problems, such as that heat exchanger tube occupies the underground space, thus gradually by engineering skill
The concern of art personnel.
As a kind of special pile foundation, energy stake is acted at work by Thermal-mechanical Coupling, load-carrying properties it is totally different in
Common pile foundation.Under the conditions of ng, energy stake working performance is studied by centrifugal model test, for clearly recognizing heat
Power coupling factor has particularly important meaning to the mechanism of action of energy stake and its application and popularization.Recent domestic needle
Model experiment under the conditions of a large amount of 1g is carried out to energy stake technology and has achieved certain achievement, however model experiment is still under the conditions of ng
Relatively fewer and more coarse in temperature control aspect, this greatly hinders the progress of energy stake.
Invention content
Present invention aims to overcome that the deficiency of existing experimental provision, provides a kind of energy stake suitable for drum centrifuge
Centrifugal model experimental provision and application method can be unfolded to study under the conditions of ng to the working mechanism of energy stake.
The present invention adopts the following technical scheme that：
A kind of energy stake centrifugal model experimental provision suitable for drum centrifuge including energy stake model 10 and measures system
System；
The energy stake model 10, mainly by 19 groups of concrete 20, miniature heat-exchange tube 18, foil gauge and steel reinforcement cage
Into；The miniature heat-exchange tube 18, outside are supported and are surrounded by steel reinforcement cage 19, and 19 periphery covering of steel reinforcement cage and inside are filled with
Concrete 20 forms the pile body of cylindrical energy stake model 10；Multiple foil gauges are posted on the outside of pile body, it should for measuring pile body
Become；Loading cover board 16 is provided at the pile crown of pile body, convenient for loading and measuring pile deflection；The energy stake model 10 is inserted in
In pile peripheral earth 17 in model casing 8；The madial wall of the model casing 8 is coated with thermal insulation material 14, and heat is prevented to scatter and disappear；
The measurement system, including displacement meter 11, force snesor 12, miniature soil pressure cell 13 and array of temperature sensor
15；The displacement meter 11 is installed on loading cover board 16, measures pile deflection；The force snesor 12 is sleeved on pile crown,
It is fixed on loading cover board 16, measures pile head load；The miniature soil pressure cell 13 is arranged in pile peripheral earth 17, positioned at energy
The side and bottom of stake model 10 are measured, measures the changing value with pile body bottom level soil pressure and vertical soil pressure around pile body；It is described
Array of temperature sensor 15 be arranged in pile peripheral earth 17, positioned at the opposite side of energy stake model 10, respectively apart from pile body axis
At one times of the heart, two times, three times and four times of stake diameters, the changing value of pile peripheral earth temperature is measured.
The energy stake model 10, section are circle.
The intensity of the concrete 20 is C20~C60, is polished or glues layer of fine sand in pile body, to change
Pile body roughness.
The miniature heat-exchange tube 18, is polythene material, and pipe laying form is U-shaped.
The thermal insulation material 14 is composite aluminium-magnesium-silicate heat-barrier material.
A kind of application method of energy stake centrifugal model experimental provision suitable for drum centrifuge, 10 He of energy stake model
Measurement system is placed in the pile peripheral earth 17 of model casing 8；Drum 2 is located at the inside of drum centrifuge external drum 1 in drum centrifuge,
Cold cycling water pump 3 is located at the outside of drum centrifuge external drum 1；Two model casings 8 are symmetrically fixed on drum 2 in drum centrifuge
In, the central axes of two model casings 8 is made to be overlapped with the central axes of drum centrifuge report control platform 7, drum centrifuge actuator 9；Energy
Miniature heat-exchange tube 18 in stake model 10 is measured by rotary joint 6, respectively with the outlet pipe of cold cycling water pump 34 and water inlet
Pipe 5 is connected, and to change pile body temperature, realizes cold cycling.
Beneficial effects of the present invention：By setting miniature heat-exchange tube inside energy stake model, miniature heat-exchange tube and
Cold cycling water pump connects, and pile body temperature effectively can be controlled, and realizes cold cycling；Pile body arranges foil gauge, can measure pile body
Strain；Pile peripheral earth lays array of temperature sensor, it can be achieved that measurement to pile peripheral earth temperature change value；Stake side arrangement is miniature
Soil pressure cell, can measure experimentation in stake week horizontal earth pressure and vertical earth pressure knots modification；Model casing is arranged in
In drum centrifuge, its mechanism of action is studied in deployable energy stake centrifugal model test.The configuration of the present invention is simple, it is economic and practical,
Operability is strong, it is easy to accomplish.
Description of the drawings
Fig. 1 is the general arrangement schematic of the embodiment of the present invention；
Fig. 2 is the model casing arrangement schematic diagram of the embodiment of the present invention；
Fig. 3 is the measurement system schematic diagram of the embodiment of the present invention；
Fig. 4 is the energy stake model schematic of the embodiment of the present invention；
Fig. 5 is the vertical view of the energy stake model of the embodiment of the present invention.
In figure：1 drum centrifuge external drum；Drum in 2 drum centrifuges；3 cold cycling water pumps；4 outlet pipes；
5 water inlet pipes；6 rotary joints；7 drum centrifuge report control platforms；8 model casings；
9 drum centrifuge actuator；10 energy stake models；11 displacement meters；12 force snesors；
13 miniature soil pressure cells；14 thermal insulation materials；15 array of temperature sensor；16 loading cover boards；
17 pile peripheral earths；18 miniature heat-exchange tubes；19 steel reinforcement cages；20 concrete.
Specific embodiment
The specific embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.Protection scope of the present invention is not limited solely to this reality
Apply the description of mode.
General arrangement schematic for the present invention as shown in Figure 1 is model casing arrangement schematic diagram as shown in Figure 2.In use,
Model casing 8 is symmetrically fixed in drum centrifuge in drum 2, be allowed to central axes and drum centrifuge report control platform 7 and drum-type from
Scheming actuator 9 flushes；Cold cycling water pump 3 is set to outside drum centrifuge, with the miniature heat inside energy stake model 10
Pipe connection is exchanged, energy stake model 10 is placed in the pile peripheral earth 17 inside model casing 8.
It is illustrated in figure 3 the measurement system schematic diagram of the present invention.In use, applying thermal insulation material 14 in 8 inner wall of model casing, prevent
Only heat scatters and disappears, and the layering of pile peripheral earth 17 then is hit actual arrival setting value.In the process, by miniature soil pressure cell 13, temperature
Sensor array 15 and energy stake model 10 are respectively arranged in pile peripheral earth 17.Wherein, miniature soil pressure cell 13 is according to experiment
It needs to be arranged, array of temperature sensor 15 is laid in respectively apart from 10 1 times of energy stake model, two times, three times and four times of stakes
At diameter.Loading cover board 16 is installed, convenient for loading and measuring pile deflection, pile head load passes through power at 10 pile crown of energy stake model
Sensor 12 and loading cover board 16 are applied on energy stake model 10.Displacement meter 11 is set on loading cover board 16, to measure
Pile deflection.
If Fig. 4 is energy stake model schematic of the present invention.When making, according to requirement of experiment configuration reinforcement cage 19, and and
Miniature heat-exchange tube 18 is fixed together, and the concrete 20 of certain label is then poured according to test requirements document, at the standard conditions
Maintenance 28 days can be used after demoulding.10 pile body of energy stake model posts foil gauge, can measure pile strain；Miniature heat exchange
Pipe 18 is connect by outlet pipe 4 and water inlet pipe 5 with hot and cold water water circulating pump 3, to reach so that 10 pile body of energy stake model by
The purpose of the temperature load of cold cycling.
Claims (9)
1. a kind of energy stake centrifugal model experimental provision suitable for drum centrifuge, which is characterized in that including energy stake model
(10) and measurement system；
The energy stake model (10), mainly by concrete (20), miniature heat-exchange tube (18), foil gauge and steel reinforcement cage (19)
Composition；The miniature heat-exchange tube (18), external to be supported and surrounded by steel reinforcement cage (19), steel reinforcement cage (19) periphery covering and interior
Portion is filled with concrete (20), forms the pile body of cylindrical energy stake model (10)；Multiple foil gauges are posted on the outside of pile body, are used for
Measure pile strain；Loading cover board (16) is provided at the pile crown of pile body, convenient for loading and measuring pile deflection；The energy
Stake model (10) is inserted in the pile peripheral earth (17) in model casing (8) Nei；The madial wall of the model casing (8) is coated with thermal insulation material
(14), heat is prevented to scatter and disappear；
The measurement system, including displacement meter (11), force snesor (12), miniature soil pressure cell (13) and temperature sensor battle array
It arranges (15)；The displacement meter (11) is installed on loading cover board (16), measures pile deflection；Force snesor (12) set
It on pile crown, is fixed on loading cover board (16), measures pile head load；The miniature soil pressure cell (13) is arranged in soil around pile
In body () 17, with pile body bottom level soil pressure and vertically around the side and bottom of energy stake model (10), measurement pile body
The changing value of soil pressure；The array of temperature sensor (15) is arranged in pile peripheral earth (17), positioned at energy stake model (10)
Opposite side, respectively at one times of pile body axle center, two times, three times and four times of stake diameters, measure the changing value of pile peripheral earth temperature.
2. a kind of energy stake centrifugal model experimental provision suitable for drum centrifuge according to claim 1, feature
It is, the energy stake model (10), section is circle.
3. a kind of energy stake centrifugal model experimental provision suitable for drum centrifuge according to claim 1 or 2, special
Sign is that the intensity of the concrete (20) is C20~C60, is polished or glues layer of fine sand in pile body, to change
Pile body roughness.
4. a kind of energy stake centrifugal model experimental provision suitable for drum centrifuge according to claim 1 or 2, special
Sign is that the miniature heat-exchange tube (18) is polythene material, and pipe laying form is U-shaped.
5. a kind of energy stake centrifugal model experimental provision suitable for drum centrifuge according to claim 3, feature
It is, the miniature heat-exchange tube (18), is polythene material, pipe laying form is U-shaped.
6. a kind of energy stake centrifugal model experimental provision suitable for drum centrifuge according to claim 1,2 or 5,
It is characterized in that, the thermal insulation material (14), is composite aluminium-magnesium-silicate heat-barrier material.
7. a kind of energy stake centrifugal model experimental provision suitable for drum centrifuge according to claim 3, feature
It is, the thermal insulation material (14), is composite aluminium-magnesium-silicate heat-barrier material.
8. a kind of energy stake centrifugal model experimental provision suitable for drum centrifuge according to claim 4, feature
It is, the thermal insulation material (14), is composite aluminium-magnesium-silicate heat-barrier material.
A kind of 9. application method of energy stake centrifugal model experimental provision suitable for drum centrifuge, which is characterized in that energy
Stake model (10) and measurement system are placed in the pile peripheral earth (17) of model casing (8)；Drum (2) is positioned at drum-type in drum centrifuge
The inside of centrifuge external drum (1), cold cycling water pump (3) is positioned at the outside of drum centrifuge external drum (1)；By two model casings (8)
Being symmetrically fixed in drum (2), makes the central axes of two model casings (8) and drum centrifuge report control platform (7), drum in drum centrifuge
The central axes of formula centrifuge actuator (9) overlap；Miniature heat-exchange tube (18) in energy stake model (10) passes through rotary joint
(6), it is connected respectively with the outlet pipe of cold cycling water pump (3) (4) and water inlet pipe (5), to change pile body temperature, realizes cold and hot
Cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810063483.8A CN108225610A (en) | 2018-01-19 | 2018-01-19 | Suitable for the energy stake centrifugal model experimental provision and application method of drum centrifuge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810063483.8A CN108225610A (en) | 2018-01-19 | 2018-01-19 | Suitable for the energy stake centrifugal model experimental provision and application method of drum centrifuge |
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| Publication Number | Publication Date |
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| CN108225610A true CN108225610A (en) | 2018-06-29 |
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ID=62668664
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810063483.8A Pending CN108225610A (en) | 2018-01-19 | 2018-01-19 | Suitable for the energy stake centrifugal model experimental provision and application method of drum centrifuge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067325A (en) * | 2020-07-17 | 2020-12-11 | 浙江大学 | Heating and refrigerating system applied to supergravity model test |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090079615A (en) * | 2008-01-18 | 2009-07-22 | 연세대학교 산학협력단 | Model horizontal load test apparatus |
| CN104142357A (en) * | 2014-08-06 | 2014-11-12 | 河海大学 | Energy pile measurement device and method |
| CN107064456A (en) * | 2017-03-10 | 2017-08-18 | 长沙理工大学 | Inclined slope pile pile-soil interaction partial model experimental rig |
| CN207662537U (en) * | 2018-01-19 | 2018-07-27 | 大连理工大学 | Energy stake centrifugal model experimental provision suitable for drum centrifuge |
-
2018
- 2018-01-19 CN CN201810063483.8A patent/CN108225610A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090079615A (en) * | 2008-01-18 | 2009-07-22 | 연세대학교 산학협력단 | Model horizontal load test apparatus |
| CN104142357A (en) * | 2014-08-06 | 2014-11-12 | 河海大学 | Energy pile measurement device and method |
| CN107064456A (en) * | 2017-03-10 | 2017-08-18 | 长沙理工大学 | Inclined slope pile pile-soil interaction partial model experimental rig |
| CN207662537U (en) * | 2018-01-19 | 2018-07-27 | 大连理工大学 | Energy stake centrifugal model experimental provision suitable for drum centrifuge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067325A (en) * | 2020-07-17 | 2020-12-11 | 浙江大学 | Heating and refrigerating system applied to supergravity model test |
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