CN108344850A - By load soil mass water-Re-power-shift assays system and method under freezing-thawing - Google Patents
By load soil mass water-Re-power-shift assays system and method under freezing-thawing Download PDFInfo
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- CN108344850A CN108344850A CN201711478646.0A CN201711478646A CN108344850A CN 108344850 A CN108344850 A CN 108344850A CN 201711478646 A CN201711478646 A CN 201711478646A CN 108344850 A CN108344850 A CN 108344850A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
Abstract
The present invention provides under a kind of freezing-thawing by load soil mass water heating power shift assays system and method, belong to seasonal frozen ground area roadbed foundation soil body indoor freezing and thawing experimental test field, include by freezing or heating the top constant temperature unit to being freezed or being melted at the top of the experiment soil body and keep the lower part constant temperature unit of soil body bottom constant temperature, the constant temperature water supply unit of simulated groundwater supply, accommodate the bearing tube of the soil body, soil temperature moisture, the state of soil monitoring unit of internal pressure and soil body soil water potential, the soil body loads and load monitoring unit, the loading testing stand and monitoring of soil displacement unit of adjustable horizontal.The system may be implemented in the soil body frozen process experiment process under indoor loading condition, and the hydro-thermal power to the soil body, entirety and layering displacement are monitored on-line, and support is provided for soil body freeze thawing research.
Description
Technical field
The invention belongs to seasonal frozen ground area roadbed foundation soil body indoor freezing and thawing experimental test fields, and in particular to a kind of jelly
Melt under environment by load soil mass water-Re-power-shift assays system and method.
Background technology
China's seasonal frozen ground is widely distributed, and distribution area accounts for about the 53.5% of national territorial area, is built in Frozen Area
Roadbed ground is there are various forms of failure modes, the frost heave such as roadbed and frost boiling, the differential settlement of ground.Above destruction
Form is all the result of soil mass water-Re-power comprehensive function although the form of expression is different.
It is efficient because laboratory test is at low cost, various factors can be tested, so laboratory test is still to grind
Study carefully the main means of soil body liquid-heat-stress coupling characteristic, has at present for indoor soil body liquid-heat-stress coupling test unit
Relevant report, such as Lee sea roc in 2013 propose a kind of large scale high pressure soil body frozen-thaw process liquid-heat-stress coupling effect experiment
System is (referring to Li Haipeng, Hu Chenchen, Song Lei, Wang Rufeng, Zhang Tao, Ren Yanlong, the rivers Yang Zhi large scale high pressure soil body frozen-thaw processes
Liquid-heat-stress coupling acts on experimental system [P] river CN103116014A, 2013-05-22.), which can be to experiment
The soil body is further applied load, but it will be fixed at the top of the soil body using the iron plate for limiting displacement after being further applied load so that the soil body is fixed empty
Interior carry out frost heave test, defines the frozen swell and melt settlement displacement of the soil body in this way, and to water translocation, pressure change etc. also produces one
Fixing is rung；Hair deodar in 2015 etc. propose a kind of Freezing Soils hydro-thermal power comprehensive experimental system and test method (referring to
Hair deodar, Hou Zhongjie, Zhang Huijun, Wang Tie weigh Freezing Soils hydro-thermal power comprehensive experimental system and the Shaanxi test method [P]：
CN104749205A,2015-07-01.)；The experimental system can make the free frost heave of the soil body and test related liquid-heat-stress coupling
Parameter, but the experimental system does not provide load to the experiment soil body, can be only used for research soil body freezing process under the condition of self-weight
Liquid-heat-stress coupling mechanism.
It can be to the soil body that top is further applied load under freezing-thawing as described above, yet there are no that a kind of report illustrates
Temperature change, water translocation, pressure change, and the soil body caused by frozen swell and melt settlement is whole and internal displacement is monitored
Test unit, but under the conditions of general Practical Project, roadbed soil matrix top is all existing for load to be had, and in upper load
Under the conditions of freeze and melt there is frost heave and thaw collapse phenomenon, the frost heave or thaw collapse phenomenon are soil mass water-Re-power comprehensive functions
As a result, and by the temperature change of the soil body, water translocation, pressure change, change in displacement shows,
Therefore one comprehensive experimental system of design is realized under freezing-thawing by the temperature of the load soil body, moisture, pressure, displacement
Test has Practical Project and scientific research meaning.
Invention content
It is of the existing technology in order to solve the problems, such as, the present invention provides under a kind of freezing-thawing by load soil mass water-heat-
Power-shift assays system and method.
To achieve the goals above, the present invention provides the following technical solutions：
By load soil mass water-Re-power-shift assays system, including bearing tube, loading testing stand, top under freezing-thawing
Constant temperature unit, lower part constant temperature unit, constant temperature water supply unit, state of soil monitoring unit, the soil body load with load monitoring unit and
Monitoring of soil displacement unit；
The bearing tube is arranged on the loading testing stand, and the bearing tube is the cylinder steel cylinder opened up and down, institute
It states carrying drum outer wall and is pasted with PVC roll material insulating layer, cricoid flange, the bearing tube both sides are provided at the top of the bearing tube
It is both provided with screw rod, the top and bottom of the screw rod are each passed through the flange and loading testing stand and are fixed by nut,
The bearing tube inside bottom is covered with fine sand layer；
The top constant temperature unit includes top low temperature thermostat, top temperature-constant plate backplate, top temperature-constant plate, top constant temperature
Liquid return duct and top constant temperature liquid stream enter pipe, and top ring thermostat tube, the top temperature-constant plate are housed inside the top temperature-constant plate
It is arranged in the upper end inlet of the bearing tube, the top temperature-constant plate backplate is arranged on the top temperature-constant plate, described
Top low temperature thermostat, top constant temperature liquid stream enter pipe, top ring thermostat tube, top constant temperature liquid return duct, top low temperature thermostat
It is sequentially communicated to form circulation path；
The lower part constant temperature unit includes bottom low temperature thermostat bath, bottom constant temperature plate backplate, bottom constant temperature plate, bottom constant temperature
Liquid return duct, bottom constant temperature liquid stream enter pipe, and the bottom constant temperature intralamellar part is equipped with bottom constant temperature coil pipe, the bottom constant temperature plate shield
Plate is arranged on the bottom constant temperature plate, and the bottom constant temperature plate backplate and bottom constant temperature plate are arranged in the bearing tube simultaneously
Positioned at the fine sand layer in the following, the bottom low temperature thermostat bath, bottom constant temperature liquid stream enter pipe, bottom constant temperature coil pipe, bottom perseverance
Warm liquid return duct, bottom low temperature thermostat bath are sequentially communicated to form circulation path；
The constant temperature water supply unit includes rubber water supply pipe, drainage tracheae, Markov bottle, temperature measurer probe and temperature measurer,
The bottom constant temperature liquid stream enters pipe and is uniformly coiled in the Markov bottle, and the temperature measurer probe is arranged in the Markov bottle,
Glass tube is socketed on the temperature measurer probe, the signal wire of the temperature measurer probe is connect with the temperature measurer, the rubber
Water supply pipe one end is connected with the fine sand layer, and the rubber water supply pipe other end is connected to the Markov bottle, the draining
Exhaust pipe one end is connected to the fine sand layer, and the other end is located at outside the bearing tube；
The state of soil monitoring unit includes data acquisition device and is arranged at the bearing tube inner wall different depth
Multiple Soil Temperature And Moisture sensors, multiple soil pressure sensors and multiple soil water potential sensors, multiple Soil Temperature And Moisture sensors,
Soil pressure sensor and soil water potential sensor are electrically connected with the data acquisition device；
The soil body load includes counter-force steel plate, top power transmission steel plate, load transducer, load biography with load monitoring unit
Sensor fixed plate, mechanic jacks and jack fixation steel plate, the load transducer fixed plate, jack fixation steel plate, on
Portion's power transmission steel plate and counter-force steel plate are successively set on from bottom to top above the top temperature-constant plate backplate, the top power transmission steel plate
It is connect by fixed screw with the counter-force steel plate, the screw rod upper end, which upwardly extends, to be sequentially passed through the load transducer and fix
Plate, jack fixation steel plate and counter-force steel plate are simultaneously fixed by nut, the pedestal of the mechanic jacks and the top power transmission
Steel plate abuts, and the top plate of the mechanic jacks passes through the jack fixation steel plate and abutted with the load transducer, institute
Stating load transducer passes through the load transducer fixed plate, the load transducer to be electrically connected with the data acquisition device；
The monitoring of soil displacement unit includes lower part power transmission steel plate, nitrogen gas spring, multiple digital display dial gauges, multiple freeze thawing
Displacement transmission lever and multiple layering displacement transmission levers, the lower part power transmission steel plate are arranged on the top temperature-constant plate backplate, institute
It states nitrogen gas spring upper end to abut with the load transducer, the nitrogen gas spring lower end is abutted with the lower part power transmission steel plate, more
A digital display dial gauge is uniformly arranged on along ring-type above the jack fixation steel plate, the freeze thawing displacement transmission lever upper end
It is abutted with the digital display dial gauge, the freeze thawing displacement transmission lever lower end penetrates in the top temperature-constant plate backplate, the layering
Displacement transmission lever upper end is abutted with the digital display dial gauge, and layering displacement transmission lever lower end is stretched into the bearing tube, institute
Digital display dial gauge is stated to be electrically connected with data acquisition device.
Preferably, the loading testing stand includes load-bearing steel plate and is arranged load-bearing branch in the load-bearing steel plate two bottom sides
Column and Level tune support castor, the bearing tube to be arranged on the load-bearing steel plate, and the screw rod lower end passes through the load-bearing
Steel plate is simultaneously fixed by nut, and the bearing column upper end is connect with the load-bearing Interal fixation, the bearing column lower end with
The Level tune support castor welds, and universal level bulb is provided on the load-bearing steel plate.
Preferably, the electric connection line of the Soil Temperature And Moisture sensor, soil pressure sensor and soil water potential sensor is respectively provided with
There is electric connection line protecting box.
Preferably, multiple Soil Temperature And Moisture sensors are arranged on the first vertical plane, multiple soil water potential sensings
Device is arranged on the second vertical plane, and multiple soil pressure sensors are arranged on third vertical plane, and described first is vertical
Face, the angle of the second vertical plane and third vertical plane between any two are 120 °.
Preferably, watertight rubber ring, the rubber are provided between the bearing tube and the contact surface of the load-bearing steel plate
It is separated with permeable stone among water supply pipe and the drainage tracheae and the fine sand layer, moisturizing is provided on the rubber water supply pipe
Tongs are provided with drainage exhaust tongs on the drainage tracheae.
Preferably, the top ring thermostat tube and the bottom constant temperature coil pipe are copper coil pipe.
Preferably, the freeze thawing displacement transmission lever includes the first rod piece and multiple second rod pieces, the first rod piece top
With cavity, first rod piece and second rod piece bottom all have groove, and the groove inner wall has internal thread, described
There is groove outer wall external screw thread, second rod piece upper end to have convex block, and the convex block outer wall is provided with matches with the internal thread
The external screw thread of conjunction, first rod piece and multiple second rod pieces are spirally connected successively, divide with the digital display thousand at the top of first rod piece
Table abuts, and second rod piece lower end is spirally connected with the top temperature-constant plate backplate.
Another object of the present invention is to provide under a kind of freezing-thawing by load soil mass water-Re-power-shift assays side
Method includes the following steps：
1) after the assembling for completing experimental system, pure water is loaded onto in the low temperature thermostat bath of bottom, by data acquisition device and electricity
Brain connects；
2) computer is opened, temperature, moisture, pressure, soil water potential, the land movement data of the soil body are monitored by data acquisition device
The payload data being subject to the soil body；
3) drainage exhaust tongs are opened, keep drainage tracheae unimpeded, the load that the soil body is applied according to schedule, manually
The control machinery jack pair soil body carries out load consolidation, in consolidation process the draining and exhaust of the soil body by drainage tracheae into
Row, until the stabilization by consolidation of the soil body, consolidation process terminate；
4) Markov bottle position is adjusted, makes Markov bottle inner glass tube bottom and on a horizontal plane, is reached at the top of fine sand layer
The purpose of the soil body is fed to analog constant level of ground water；Bottom low temperature thermostat bath is opened, is mended according to underground water to be simulated is designed
To temperature, the operating temperature of bottom low temperature thermostat bath is set, after reaching operating temperature, opens outer loop pump, passes through bottom perseverance
Warm liquid stream enters pipe and the water in Markov bottle is heated or cooled down, and when the displays temperature of temperature measurer reaches design value, opens and mends
Water tongs supply water, when the glass bottom of the tube in the endotracheal water level of drainage and Markov bottle is in the same horizontal plane
When, carry out next step；
5) thermostatic medium alcohol is added in top low temperature thermostat, opens top low temperature thermostat, it is right according to designing
The operating temperature for the temperature setting top low temperature thermostat that the soil body is freezed after reaching operating temperature, opens outer loop pump,
The soil body is freezed, when the temperature of the soil body, moisture, pressure, soil water potential, entirety and layering displacement data, the lotus that the soil body is subject to
When load data reach stable, end is freezed to test, and carries out next step；
6) top low temperature thermostat is closed, the thermostatic medium alcohol in the thermostat of discharge top is added water and is situated between as constant temperature
Matter；Top low temperature thermostat is opened, it will be to the work for the temperature setting top low temperature thermostat that the soil body is melted according to design
Temperature after reaching operating temperature, is opened outer loop pump, is melted to the soil body, when the temperature of the soil body reaches the temperature before freezing
Degree, moisture, pressure, soil water potential, entirety and the layering displacement data of the soil body, when the payload data that the soil body is subject to reaches stable, knot
Shu Ronghua is tested；
7) collected data are sent to computer by data acquisition device, are analyzed data.
Had with following by load soil mass water-Re-power-shift assays system and method under freezing-thawing provided by the invention
Beneficial effect：
1) Flexible element being introduced into so that frozen swell and melt settlement can be carried out in freezing-thawing test by the load soil body, in conjunction with existing sensing
Device and data acquisition technology so that the temperature of soil body during by frozen swell and melt settlement of the load soil body in freezing-thawing test, moisture,
Soil water potential, pressure, displacement and payload data can monitor in real time；The experimental system is closer compared to previous soil body experiment system
Practical Project is true；
2) Flexible element of the nitrogen gas spring as reference is a kind of using high pressure nitrogen as the novel elastic group of working media
Part, it has, and elastic force is big, small, stroke is long, stable working, and service life is long, and spring curve gently waits metal springs, rubber
The advantageous property not having with common elastics components such as air cushions is a kind of ideal elastic portion of a new generation with flex capability
Part, and the manufacturing process of nitrogen gas spring comparative maturity, there are many purchase customization channel, can according to different testing programs,
Select its volume, elastic force and stroke range；
3) the constant temperature water supply unit designed more really simulates underground water and is mended to the permanent water level of roadbed soil matrix and permanent water temperature
It gives；
4) it is pasted with PVC roll material thermal insulation board in the bearing tube periphery for accommodating the soil body, external temperature ring can be effectively reduced
Test error caused by border；
5) the adjustable horizontal loading testing stand designed ensure that bearing tube and test the vertical of the soil body, ensure that experiment number
According to not influenced by horizontal force；
6) design sensor electric connection line protection location by electric connection line protecting box inner disk around certain length
Electric connection line avoids body frost heaving thaw collapse may to the destruction (stretch or compress) of sensor electric connection line and this destruction
Caused bearing tube leakproofness is destroyed；
7) by the combination of computer and data acquisition device, automatic collection and the storage of test data are realized.
Description of the drawings
Fig. 1 is the vertical section structural schematic diagram of the experimental system of the present invention；
Fig. 2 is the floor map of sensor arrangement；
Fig. 3 is the planar structure schematic diagram of top temperature-constant plate backplate；
Fig. 4 is the planar structure schematic diagram of top temperature-constant plate；
Fig. 5 is the planar structure schematic diagram of bottom constant temperature plate backplate；
Fig. 6 is the plane and vertical cross-section structural schematic diagram of bottom constant temperature plate；
Fig. 7 is nitrogen gas spring snap-gauge planar structure schematic diagram；
Fig. 8 is freeze thawing displacement transmission lever structural schematic diagram；
Fig. 9 is the structural schematic diagram for being layered displacement transmission lever and its sleeve partial enlargement；
Figure 10 is the structural schematic diagram of electric connection line protecting box.
Specific implementation mode
Below in conjunction with the accompanying drawings, the specific implementation mode of the present invention is further described.Following embodiment is only used for more
Technical scheme of the present invention is clearly demonstrated, and not intended to limit the protection scope of the present invention.
Embodiment 1
The present invention provides under a kind of freezing-thawing by load soil mass water-Re-power-shift assays system, specifically such as Fig. 1 institutes
Show, including bearing tube 18, loading testing stand, top constant temperature unit, lower part constant temperature unit, constant temperature water supply unit, state of soil prison
Survey unit, soil body load and load monitoring unit and monitoring of soil displacement unit.Bearing tube 18 is carried for accommodating the experiment soil body 46
Object testing stand is used to freeze 46 top of the experiment soil body by refrigeration or heating for placing bearing tube 18, top constant temperature unit
Knot or thawing processing, lower part constant temperature unit is for keeping 46 bottom constant temperature of the soil body, constant temperature water supply unit to be mended for simulated groundwater
It gives, state of soil monitoring unit is for being monitored the parameters such as the humiture, internal pressure, the flow of water of the soil body 46；
Bearing tube 18 is arranged on loading testing stand, and bearing tube 18 is open up and down cylinder steel cylinder, outside bearing tube 18
Wall is pasted with PVC roll material insulating layer 19, and 18 top of bearing tube is provided with cricoid flange 47, and 18 both sides of bearing tube are both provided with spiral shell
The top and bottom of bar 4, screw rod 4 are each passed through flange 47 and loading testing stand and are fixed by nut 5,18 inside bottom of bearing tube
Portion is covered with fine sand layer 20；Several electric connection line outlets 16 are offered on 18 side wall of bearing tube and PVC roll material insulating layer 19, are used for
Each sensor signal lines pick out.
Top constant temperature unit includes top low temperature thermostat 48, top temperature-constant plate backplate 11, top temperature-constant plate 12, top
Constant temperature liquid return duct 49 and top constant temperature liquid stream enter pipe 50, and top constant temperature unit is arranged in the 18 outside upper right corner of bearing tube.Top
12 inside of temperature-constant plate is equipped with top ring thermostat tube 13, and top temperature-constant plate 12 is arranged in the upper end inlet of bearing tube 18, and top is permanent
Warm plate backplate 11 is arranged on top temperature-constant plate 12, and top low temperature thermostat 48, top constant temperature liquid stream enter pipe 50, top constant temperature
Coil pipe 13, top constant temperature liquid return duct 49, top low temperature thermostat 48 are sequentially communicated to form circulation path；Top low temperature thermostat
48 thermostatic mediums being equipped with are divided into alcohol and water according to the difference of operating temperature, and 48 operating temperature of top low temperature thermostat is less than 5
DEG C when select alcohol as thermostatic medium, 48 operating temperature of top low temperature thermostat selects pure water at 5-80 DEG C.
Further, as shown in Figure 3 and Figure 4, top temperature-constant plate backplate 11 and top temperature-constant plate 12 are cylinder, and half
The radius that diameter compares bearing tube 18 is smaller, and top temperature-constant plate backplate 11, which is equipped with, to be entered pipe 50 for top constant temperature liquid stream and penetrate and top
The top constant temperature fluid flow tube access hole 58-1 that constant temperature liquid return duct 49 is pierced by, the nitrogen gas spring card of fixed nitrogen gas spring snap-gauge 51
Plate screw perforation 58-4, passes through for casing 45 and can fix the threaded cased perforated 58-2 of freeze thawing displacement transmission lever 10, top
Temperature-constant plate 12 is equipped with the groove for placing top ring thermostat tube 13.
Top ring thermostat tube 13 is equipped with enters the top that pipe 50 and top constant temperature liquid return duct 49 connect for top constant temperature liquid stream
Portion ring thermostat tube starting point 59-1 and top ring thermostat tube terminal 59-2, equipped with the cased perforated 58-5 passed through for casing 45, top
The fixed screw perforation 58-3 that temperature-constant plate backplate 11 and top temperature-constant plate 12 are designed with by screw by them is attached.
In the present embodiment, lower part constant temperature unit includes bottom low temperature thermostat bath 39, bottom constant temperature plate backplate 22, bottom constant temperature
Plate 23, bottom constant temperature liquid return duct 28, bottom constant temperature liquid stream enter pipe 32, and lower part constant temperature unit is arranged under 18 external right of bearing tube
Angle.23 inside of bottom constant temperature plate is equipped with bottom constant temperature coil pipe 24, and bottom constant temperature plate backplate 22 is arranged on bottom constant temperature plate 23,
Bottom constant temperature plate backplate 22 and the setting of bottom constant temperature plate 23 in bearing tube 18 and are located at fine sand layer 20 in the following, bottom low temperature
Thermostat 39, bottom constant temperature liquid stream enter pipe 32, bottom constant temperature coil pipe 24, bottom constant temperature liquid return duct 28, bottom low temperature thermostat bath
39 are sequentially communicated to form circulation path, and the thermostatic medium that bottom low temperature thermostat bath 39 is equipped with is pure water；
Further, as shown in Figure 5 and Figure 6, bottom constant temperature plate backplate 22 and bottom constant temperature plate 23 are cylinder, and half
The radius that diameter compares bearing tube 18 is smaller；Bottom constant temperature plate backplate 22 is equipped with can be with rubber water supply pipe 30 and drainage tracheae 33
The rubber tube connecting hole 58-9 of connection and the permeable stone for placing permeable stone 21 place groove 60-1；Bottom constant temperature plate 23 is set
Have and enter pipe 32 for bottom constant temperature liquid stream and penetrate the bottom constant temperature fluid flow tube access hole 58-6 being pierced by with top constant temperature liquid return duct 28,
Enter the bottom constant temperature coil pipe starting point 59-3 and bottom constant temperature that pipe 32 and bottom constant temperature liquid return duct 28 connect for bottom constant temperature liquid stream
Coil pipe terminal 59-4 is additionally provided with for the rubber tube perforation 58-7 that rubber water supply pipe 30 and drainage tracheae 33 pass through and places bottom
The groove of ring thermostat tube 24.
Constant temperature water supply unit includes rubber water supply pipe 30, drainage tracheae 33, Markov bottle 35, temperature measurer probe 40 and thermometric
Instrument 41, bottom constant temperature liquid stream enter pipe 32 and are uniformly coiled in Markov bottle 35, and temperature measurer probe 40 is arranged in Markov bottle 35, thermometric
Glass tube 36 is socketed on instrument probe 40, the signal wire of temperature measurer probe 40 is connect with temperature measurer 41,30 one end of rubber water supply pipe
It is connected with fine sand layer 20, other end Markov bottle 35 is connected to, and 33 one end of drainage tracheae is connected to fine sand layer 20, the other end
Outside bearing tube 18.Further, in this embodiment the temperature of water in Markov bottle 35 can be monitored by temperature measurer 41.
State of soil monitoring unit includes data acquisition device 17 and is arranged multiple at 18 inner wall different depth of bearing tube
Soil Temperature And Moisture sensor 14, multiple soil pressure sensors 57 and multiple soil water potential sensors 42, multiple Soil Temperature And Moisture sensors 14,
Soil pressure sensor 57 and soil water potential sensor 42 are electrically connected with data acquisition device 17, and Soil Temperature And Moisture senses in the present embodiment
Device 14, soil pressure sensor 57 and soil water potential sensor 42 are 8；As shown in Fig. 2, 8 Soil Temperature And Moisture sensors 14 are uniformly distributed
It sets on the first vertical plane, 8 soil water potential sensors 42 are arranged on the second vertical plane, and 8 soil pressure sensors 57 are uniformly distributed
It sets on third vertical plane, the first vertical plane, the angle of the second vertical plane and third vertical plane between any two are 120 °.
It includes counter-force steel plate 2, top power transmission steel plate 3-1, load transducer 9, load that the soil body, which is loaded with load monitoring unit,
Sensor fixation plate 53, mechanic jacks 56 and jack fixation steel plate 54, load transducer fixed plate 53, jack fix steel
Plate 54, top power transmission steel plate 3-1 and counter-force steel plate 2 are successively set on 11 top of top temperature-constant plate backplate from bottom to top, and top passes
Power steel plate 3-1 is connect with counter-force steel plate 2 by fixed screw 1, and 4 upper end of screw rod upwardly extends that sequentially pass through load transducer solid
Fixed board 53, jack fixation steel plate 54 and counter-force steel plate 2 are simultaneously fixed by nut 5, and pedestal and the top of mechanic jacks 56 pass
Power steel plate 3-1 is abutted, and the top plate of mechanic jacks 56 passes through jack fixation steel plate 54 and abutted with load transducer 9, load
Sensor 9 passes through load transducer fixed plate 53, load transducer 9 to be electrically connected with data acquisition device 17；
Monitoring of soil displacement unit includes lower part power transmission steel plate 3-2, nitrogen gas spring 52, multiple digital display dial gauges 6, multiple jellies
Melting displacement transmission lever 10 and multiple layering displacement transmission levers 44, lower part power transmission steel plate 3-2 is arranged on top temperature-constant plate backplate 11,
52 upper end of nitrogen gas spring is abutted with load transducer 9, and 52 lower end of nitrogen gas spring is abutted with lower part power transmission steel plate 3-2, multiple digital displays
Amesdial 6 is uniformly arranged on along ring-type above jack fixation steel plate 54,10 upper end of freeze thawing displacement transmission lever and digital display dial gauge 6
It abuts, 10 lower end of freeze thawing displacement transmission lever penetrates in top temperature-constant plate backplate 11,44 upper end of layering displacement transmission lever and digital display thousand
Table 6 is divided to abut, 44 lower end of layering displacement transmission lever is stretched into bearing tube 18, and digital display dial gauge 6 is electrically connected with data acquisition device 17.
Further, counter-force steel plate 2, fixation steel plate 54, load transducer fixed plate 53, flange 47,25 and of load-bearing steel plate
Top power transmission steel plate 3-1 is cylindrical shape and is horizontal positioned；
It is all disposed on top power transmission steel plate 3-1 and counter-force steel plate 2 and top power transmission steel plate 3-1 is carried out for fixed screw 1
The fixed screw of connection is perforated；It is disposed with the perforation of mechanic jacks top plate on fixation steel plate 54, digital display dial gauge 6 is auxiliarily fixed
Digital display dial gauge is perforated, another device that digital display dial gauge 6 is auxiliarily fixed is the digital display dial gauge pedestal 55 in Fig. 1；
The load transducer mounting hole of fixed load sensor 9 is disposed in load transducer fixed plate 53；Mechanical jack
Top 56 is perforated by the mechanic jacks top plate on fixation steel plate and is contacted with lower part load transducer 9, and 56 He of mechanic jacks
Load transducer 9 is vertical places；Counter-force steel plate 2, fixation steel plate 54, load transducer fixed plate 53 and flange are all by high-strength
Screw rod and nut 5 are fixedly connected with the loading testing stand of adjustable horizontal；
As shown in figure 9,44 top of layering displacement transmission lever is no more than 45 top of casing；Digital display dial gauge 6 is in casing 45
Portion is in contact with layering displacement transmission lever 44；It is cross structure 44-1 to be layered 44 bottom of displacement transmission lever, and 45 bottom of casing is three
Angular tip 45-1.When institute's stress is less than the power that itself nitrogen generates, nitrogen gas spring 52 extends nitrogen gas spring 52, suffered
When power is more than the power that itself nitrogen generates, nitrogen gas spring 52 is shunk, and when nitrogen gas spring 52 is extended or shunk, is fixed on top
Freeze thawing displacement transmission lever 10 on portion's temperature-constant plate backplate 11 is moved accordingly, multiple layering displacement transmission levers in the soil body 46
44 are also moved.
It is all disposed with nitrogen gas spring card on top temperature-constant plate backplate 11, lower part power transmission steel plate 3-2 and nitrogen gas spring snap-gauge 51
Plate screw is perforated, as shown in fig. 7, nitrogen gas spring snap-gauge 51 is two pieces of half-moon-shaped iron props.
Loading testing stand includes load-bearing steel plate 25 and is arranged bearing column 26 and level in 25 two bottom sides of load-bearing steel plate
Support castor 27 is adjusted, bearing tube 18 is arranged on load-bearing steel plate 25, and 4 lower end of screw rod passes through load-bearing steel plate 25 and passes through nut 5
Fixed, 26 upper end of bearing column is fixedly connected with load-bearing steel plate 25, and 26 lower end of bearing column is welded with Level tune support castor 27
It connects, universal level bulb 31 is provided on load-bearing steel plate 25.
Further, the fixed screw being attached with bearing column 26 is disposed on load-bearing steel plate 25 to perforate, for bottom
Constant temperature liquid stream enters pipe 32 and penetrates the bottom constant temperature fluid flow tube access hole being pierced by with bottom constant temperature liquid return duct 28, for rubber water supply pipe
30 and drainage tracheae 33 pass through rubber tube pipe perforation, load-bearing steel plate 25 is fixed for high-strength bolt 4 and nut 5
Screw rod is perforated, and there also is provided the universal level bulb placement groove for placing universal level bulb and the steel cylinder for placing steel cylinder 18 is placed
Groove；26 top of bearing column carries threaded groove, passes through the fixed screw perforation 58-3 on screw and load-bearing steel plate 25
Also the connection of weight steel plate 25 and bearing column 26 is realized on 26 top of bearing column with threaded groove.
In order to which the electric connection line to sensor is protected, the present embodiment is in Soil Temperature And Moisture sensor 14, soil pressure sensing
It is both provided with electric connection line protecting box 15 outside device 57 and soil water potential sensor 42.As shown in Figure 10, protecting box 15 is by carrying storage
Two of space and half moon shape hole 15-1 are connected by screw with nut without top iron and screw box 15-2, each without top iron and screw box 15-2
On also set up that there are two perforate for screw and the fixed screw of nut fixation.Top ring thermostat tube 13 and bottom in the present embodiment
Ring thermostat tube 24 is copper coil pipe.
In the present embodiment, watertight rubber ring 38 is provided between bearing tube 18 and the contact surface of load-bearing steel plate 25, rubber is mended
It is separated with permeable stone 21 among water pipe 30 and drainage tracheae 33 and fine sand layer 20, moisturizing sealing is provided on rubber water supply pipe 30
34-1 is pressed from both sides, drainage exhaust tongs 34-2 is provided on drainage tracheae 33.
Further, as shown in figure 8, freeze thawing displacement transmission lever 10 includes the first rod piece 10-1 and multiple second rod piece 10-
There is cavity at the top of 2, the first rod piece 10-1, the first rod piece 10-1 and the second bottoms rod piece 10-2 all have groove, groove inner wall
With internal thread, there is groove outer wall external screw thread, the second upper ends rod piece 10-2 to have convex block, and convex block outer wall is provided with and internal thread
The external screw thread of cooperation, the first rod piece 10-1 and multiple second rod piece 10-2 are spirally connected successively, the first tops rod piece 10-1 and digital display thousand
Table 6 is divided to abut, the second lower ends rod piece 10-2 are spirally connected with top temperature-constant plate backplate 11.
It is by the assembling steps of load soil mass water-Re-power-shift assays system under freezing-thawing provided in this embodiment：
1) assembling and leveling loading testing stand：Bearing column 26 and Level tune support castor 27 are welded by manual metal-arc welding, are held
Weight steel plate 25 and four bearing columns 26 are held by four fixed screws perforation 58-3 on load-bearing steel plate 25 with four by screw
Weight pillar 26 is fixedly connected respectively, and after the completion of connection, the universal level bulb placement groove 60-2 on load-bearing steel plate 25 is put
Universal level bulb 31 is set, after the completion, supports castor 27 and universal level bulb 31 that load-bearing steel plate 25 is adjusted to water by Level tune
It is flat；
2) assembly keeps the lower part constant temperature unit of 46 bottom constant temperature of the soil body：By bottom constant temperature return duct 28 and bottom constant temperature liquid
It flows into pipe 32 to pass through from 25 bottom of load-bearing steel plate by bottom constant temperature fluid flow tube access hole 58-6, after passing through, bottom constant temperature is returned
Flow tube 28 and bottom constant temperature liquid stream enter pipe 32 and are risen with the bottom constant temperature coil pipe on the bottom constant temperature coil pipe 24 in bottom constant temperature plate 23
Point 59-3 is connected with bottom constant temperature coil pipe terminal 59-4；Bottom constant temperature plate 23 and bottom constant temperature plate backplate 22 are placed on load-bearing
On steel plate 25, bottom constant temperature plate backplate 22 is placed on the upper surface of bottom constant temperature plate 23, and placing range is holding on load-bearing steel plate 25
It carries cylinder to place in the inside diameter ranges of groove 60-3, and bottom constant temperature plate backplate 22 places the one side of groove 60-1 with permeable stone
Above；
3) constant temperature water supply unit is assembled：Rubber water supply pipe 30 and drainage tracheae 33 are each passed through load-bearing steel plate 25 and bottom
Rubber tube perforation 58-7, the rubber tube connecting hole 58-9 passed through on bottom constant temperature plate backplate 22 on portion's temperature-constant plate 23 realize bottom
Moisturizing tongs are installed in the connection of temperature-constant plate backplate 22 and rubber water supply pipe 30 and drainage tracheae 33 on rubber water supply pipe 30
34-1 installs drainage exhaust tongs 34-2 on drainage tracheae 33；It will be packed into pure water in Markov bottle 35, rubber stopper is installed
37 and glass tube 36, temperature measurer probe is put by glass tube 36 in the water in Markov bottle 35, by electric connection line by thermometric
Instrument probe is connected with temperature measurer 41；Bottom constant temperature liquid stream is entered pipe 32 to be uniformly coiled in Markov bottle, by bottom cryogenic thermostat
Slot 39 enters pipe 32 with bottom constant temperature liquid stream and bottom constant temperature liquid return duct 28 is connect；
4) bearing tube is assembled：Bearing tube on load-bearing steel plate 25, which is placed, places watertight rubber ring 38 on groove 60-3, so
Bearing tube 18 is placed afterwards, pastes PVC roll material insulating layer 19 in 18 periphery of bearing tube, flange 47 is placed on bearing tube 18, is passed through
Bearing tube 18 is fixed in high-strength bolt 4, nut 5, flange 47, load-bearing steel plate 25；
5) back-up sand places groove 60-1 in two permeable stones of bottom constant temperature plate backplate 22 and permeable stone 21 is placed above, so
It is laid with fine sand layer 20 afterwards；
6) it bankets, buries temperature moisture monitoring unit, pressure monitoring unit, soil water potential monitoring unit, sensor electrical connection
Line protection location is embedded, bearing tube sealing：It is layered according to " earthwork test rule SL237-1999 " in the upper surface of fine sand layer 20
It bankets, is compacted, until the electric connection line reached on the bearing tube 18 and PVC roll material insulating layer 19 of design exports 16 positions, it will be native
The warm and humid sensor 14 of earth, soil water potential sensor 42 electric connection line corresponding with them with soil pressure sensor 57 connect, and are put into
Bearing tube 18 draws electric connection line from electric connection line outlet 16, is connect with data acquisition device 17, when arrangement, three of this layer
Sensor is on the same horizontal plane, and the angle between them is 120 °；Each sensor and electric connection line outlet 16 it
Between electric connection line protecting box 15 is added, after electric connection line is coiled several circles, with two with half moon shape hole 15-1 without top iron and screw
Box 15-2 is buckled, and is connected two without top iron and screw box 15-2 with nut with screw, in this way, there is sufficiently long electric connection line to be stored in
In electric connection line protecting box 15, soil body freeze thawing lifting will not be to leading to the destruction of electric connection line；Drawing electric connection line
Bearing tube 18 on electric connection line outlet 16 in encapsulating, be sealed；
7) first layering displacement transmission lever 44 and sleeve 45 are placed, cross structure 44-1 is under layering displacement transmission lever 44
Portion, triangular tip 45-1 are 45 lower part of sleeve, then place fixation steel plate 54, true by the cased perforated on fixation steel plate 54
The position for determining casing 45 further determines that the position of layering displacement transmission lever 44；Determine the position of layering displacement transmission lever 44
Afterwards, it is made marks, is marked in having hit on the real soil body for their lower parts by sleeve 45 and layering displacement transmission lever 44
Afterwards, take away fixation steel plate 54, keep sleeve 45 vertical on the label of place, continue layering and banket and hit reality, banket and
It hits and notices that 45 bottom of sleeve is higher by 2-3cm than layering displacement transmission lever 44 in real time；Until hitting the real bearing tube to next design
18 and PVC roll material insulating layer 19 on electric connection line export 16 positions after, repeat step 6) and 7) until reach setting for the soil body 46
It is horizontal to notice that the upper surface of the top layer soil body requires for meter height；
8) the top constant temperature unit that refrigeration or heating are freezed or melted to the experiment soil body 46 is fitted through：By top perseverance
Warm return duct 49 and top constant temperature liquid stream enter pipe and are worn from top temperature-constant plate backplate 11 by top constant temperature fluid flow tube access hole 58-1
It crosses, after passing through, top constant temperature return duct 49 and top constant temperature liquid stream is entered into pipe 50 and the top constant temperature disk in top temperature-constant plate 12
Top ring thermostat tube starting point 59-1 on pipe 13 is connected with top ring thermostat tube terminal 59-2, after connection, passes through top with screw
4 fixed screws perforation 58-3 on portion's temperature-constant plate backplate 11 and top temperature-constant plate 12 is permanent by top temperature-constant plate backplate 11 and top
Warm plate 12 connects, and after connection, the layering displacement transmission lever 44 buried and casing 45 is made to pass through top temperature-constant plate 12 and top
Top temperature-constant plate 12 and top temperature-constant plate backplate 11 are placed on the soil body 46 by portion's temperature-constant plate backplate 11；
9) nitrogen gas spring is assembled：Nitrogen gas spring snap-gauge 51 is placed on lower part power transmission steel plate 3-2, nitrogen gas spring 52 is put
It sets among nitrogen gas spring snap-gauge 51, lower part power transmission steel plate 3-2 is placed on top temperature-constant plate backplate 11, passes through nitrogen with screw
Gas spring snap-gauge 51, the nitrogen gas spring snap-gauge screw perforation 58-4 on lower part power transmission steel plate 3-2 and top temperature-constant plate backplate 11 are real
The fixation of existing nitrogen gas spring 52 and nitrogen gas spring snap-gauge 51, lower part power transmission steel plate 3-2, the connection of top temperature-constant plate backplate 11；
10) freeze thawing displacement transmission lever is assembled：Height according to top temperature-constant plate backplate 11 apart from 52 top of nitrogen gas spring is high
The height for going out 2-3 centimetres determines the number (Design of length of the second rod piece 10-2 is 2cm) of the second rod piece 10-2, passes through first
The bottom thread of rod piece 10-1 connects the first rod piece 10-1 and the second rod piece 10-2 with the second rod piece 10-2 screw tops, passes through
Two rod piece 10-2 bottom threads connect multiple second rod piece 10-2 with the second rod piece 10-2 screw tops and finally form freeze thawing displacement
Transmission lever 10 passes through the threaded cased perforated 58-2 on 10 bottom thread of freeze thawing displacement transmission lever and top temperature-constant plate backplate 11
Fixed freeze thawing displacement transmission lever 10；
11) unit for assembling 46 load monitoring unit of the soil body and the soil body 46 being loaded：Make freeze thawing displacement transmission lever 10 and more
A casing 45 is by the cased perforated in load transducer fixed plate 53, in 2-3 centimetres of height higher than 52 top of nitrogen gas spring
It is upper to pass through 5 fixed load sensor fixation plate 53 of high-strength bolt 4 and nut, load transducer 9 is placed on load transducer and is consolidated
In load transducer mounting hole on fixed board 53, and load transducer 9 is made to be contacted with 52 top of nitrogen gas spring；It is sensed than load
The fixation steel plate 54 for passing through 5 solid mechanical jack of high-strength bolt 4 and nut at the 9 high 2-3cm in top of device, on fixation steel plate 54
Inverted mechanic jacks 56 are installed, adjusting mechanic jacks 56 makes the top plate of mechanic jacks 56 pass through on fixation steel plate 54
Mechanic jacks top plate perforation be connected with the top of load transducer 9；Multiple digital display dial gauges on fixation steel plate 54
Multiple digital display dial gauge pedestals 55 are placed in the upper surface of perforation, are then placed multiple digital display dial gauges 6, are determined digital display dial gauge 6
Bottom is in contact with the top of layering displacement transmission lever 44, determines the top of the bottom and the first rod piece 10-1 of digital display dial gauge 6
The bottom connection of groove touches, and is connect digital display dial gauge 6 with data acquisition device 17 by electric connection line；In inverted mechanical jack
Top power transmission steel plate 3-1 is placed at the top on top 56, is placed counter-force steel plate 2 on the top of top power transmission steel plate 3-1, is passed through fixed spiral shell
Silk 1 connects top power transmission steel plate 3-1 and counter-force steel plate 2；Counter-force steel plate 2 is fixed by high-strength bolt 4 and nut 5；
12) it is connect with computer by data acquisition device 17, by electric connection line.
The present embodiment additionally provides real by load soil mass water-Re-power-displacement under the freezing-thawing based on the experimental system
It tests, is as follows：
1) after the assembling for completing experimental system, pure water is loaded onto in bottom low temperature thermostat bath 39, by data acquisition device 17
It is connect with computer；
2) computer is opened, the temperature of the monitoring soil body 46 of data acquisition device 17, moisture, pressure, soil water potential, land movement are passed through
The payload data that data and the soil body are subject to；
3) drainage exhaust tongs 34-2 is opened, keeps drainage tracheae 33 unimpeded, the soil body 46 is applied according to schedule
Load manually controls mechanical jack 56 and carries out load consolidation to the soil body 46, and the draining and exhaust of the soil body 46 are logical in consolidation process
The progress of drainage tracheae 33 is crossed, until the stabilization by consolidation of the soil body 46, consolidation process terminate；
4) 35 position of Markov bottle is adjusted, makes 35 inner glass tube of Markov bottle, 36 bottom with 20 top of fine sand layer in a level
On face, achieve the purpose that analog constant level of ground water feeds the soil body 46；Bottom low temperature thermostat bath 39 is opened, to be simulated according to design
Recharge of ground water temperature, be arranged bottom low temperature thermostat bath 39 operating temperature, after reaching operating temperature, open outer loop
Pump, enters pipe 32 by bottom constant temperature liquid stream and the water in Markov bottle 35 is heated or cooled down, when the displays temperature of temperature measurer 41
It when reaching design value, opens moisturizing tongs 34-1 and supplies water, when in the water level and Markov bottle 35 in drainage tracheae 33
36 bottom of glass tube carries out next step in the same horizontal plane；
5) thermostatic medium alcohol is added in top low temperature thermostat 48, top low temperature thermostat 48 is opened, according to design
It to be opened outer to the operating temperature for the temperature setting top low temperature thermostat 48 that the soil body 46 is freezed, after reaching operating temperature
Portion's circulating pump freezes the soil body 46, when the temperature of the soil body 46, moisture, pressure, soil water potential, entirety and is layered displacement data,
When the payload data that the soil body is subject to reaches stable, end is freezed to test, and carries out next step；
6) top low temperature thermostat 48 is closed, water is added as constant temperature in the thermostatic medium alcohol in the thermostat of discharge top
Medium；Top low temperature thermostat 48 is opened, it will be to temperature setting top low temperature thermostat that the soil body 46 is melted according to design
48 operating temperature after reaching operating temperature, is opened outer loop pump, is melted to the soil body 46, when the temperature of the soil body 46 reaches
Temperature to before freezing, moisture, pressure, soil water potential, entirety and the layering displacement data of the soil body 46, the payload data that the soil body is subject to
When reaching stable, terminate to melt experiment；
7) collected data are sent to computer by data acquisition device 17, are analyzed data.
Embodiment described above is merely preferred embodiments of the present invention, and protection scope of the present invention is without being limited thereto,
Any technical person familiar with the field in the technical scope of present disclosure, the technical solution that can become apparent to
Simple change or equivalence replacement, all belong to the scope of protection of the present invention.
Claims (8)
1. by load soil mass water-Re-power-shift assays system under a kind of freezing-thawing, which is characterized in that including bearing tube
(18), loading testing stand, top constant temperature unit, lower part constant temperature unit, constant temperature water supply unit, state of soil monitoring unit, the soil body
Load and load monitoring unit and monitoring of soil displacement unit；
The bearing tube (18) is arranged on the loading testing stand, and the bearing tube (18) is the cylinder steel opened up and down
Cylinder, bearing tube (18) outer wall are pasted with PVC roll material insulating layer (19), cricoid method are provided at the top of the bearing tube (18)
Blue (47), bearing tube (18) both sides are both provided with screw rod (4), and the top and bottom of the screw rod (4) are each passed through described
Flange (47) and loading testing stand are simultaneously fixed by nut (5), and bearing tube (18) inside bottom is covered with fine sand layer (20)；
The top constant temperature unit include top low temperature thermostat (48), top temperature-constant plate backplate (11), top temperature-constant plate (12),
Top constant temperature liquid return duct (49) and top constant temperature liquid stream enter pipe (50), and top constant temperature is housed inside the top temperature-constant plate (12)
Coil pipe (13), top temperature-constant plate (12) setting is in the upper end inlet of the bearing tube (18), the top temperature-constant plate shield
Plate (11) setting the top temperature-constant plate (12) above, the top low temperature thermostat (48), top constant temperature liquid stream enter pipe
(50), top ring thermostat tube (13), top constant temperature liquid return duct (49), top low temperature thermostat (48) are sequentially communicated to form cycle
Access；
The lower part constant temperature unit include bottom low temperature thermostat bath (39), bottom constant temperature plate backplate (22), bottom constant temperature plate (23),
Bottom constant temperature liquid return duct (28), bottom constant temperature liquid stream enter pipe (32), and bottom constant temperature is housed inside the bottom constant temperature plate (23)
Coil pipe (24), the bottom constant temperature plate backplate (22) setting the bottom constant temperature plate (23) above, the bottom constant temperature plate shield
Plate (22) and bottom constant temperature plate (23) setting in the bearing tube (18) and are located at the fine sand layer (20) in the following, the bottom
Portion's low temperature thermostat bath (39), bottom constant temperature liquid stream enter pipe (32), bottom constant temperature coil pipe (24), bottom constant temperature liquid return duct (28),
Bottom low temperature thermostat bath (39) is sequentially communicated to form circulation path；
The constant temperature water supply unit includes rubber water supply pipe (30), drainage tracheae (33), Markov bottle (35), temperature measurer probe
(40) enter pipe (32) with temperature measurer (41), the bottom constant temperature liquid stream and be uniformly coiled in the Markov bottle (35), the thermometric
Instrument probe (40) setting is socketed with glass tube (36), the survey in the Markov bottle (35) on the temperature measurer probe (40)
The signal wire of warm instrument probe (40) is connect with the temperature measurer (41), described rubber water supply pipe (30) one end and the fine sand layer
(20) it is connected, rubber water supply pipe (30) other end is connected to the Markov bottle (35), the drainage tracheae (33) one
End is connected with the fine sand layer (20), and the other end is located at the bearing tube (18) outside；
The state of soil monitoring unit includes data acquisition device (17) and is arranged in the bearing tube (18) inner wall different depth
Multiple Soil Temperature And Moisture sensors (14), multiple soil pressure sensors (57) and multiple soil water potential sensors (42) at place, Duo Gesuo
State Soil Temperature And Moisture sensor (14), soil pressure sensor (57) and soil water potential sensor (42) with the data acquisition device (17)
Electrical connection；
The soil body load and load monitoring unit include counter-force steel plate (2), top power transmission steel plate (3-1), load transducer
(9), load transducer fixed plate (53), mechanic jacks (56) and jack fixation steel plate (54), the load transducer are solid
Fixed board (53), jack fixation steel plate (54), top power transmission steel plate (3-1) and counter-force steel plate (2) are successively set on from bottom to top
Above the top temperature-constant plate backplate (11), the top power transmission steel plate (3-1) passes through fixed screw with the counter-force steel plate (2)
(1) it connects, screw rod (4) upper end upwardly extends and sequentially passes through the load transducer fixed plate (53), jack fixes steel
Plate (54) and counter-force steel plate (2) are simultaneously fixed by nut (5), pedestal and the top power transmission steel of the mechanic jacks (56)
Plate (3-1) abuts, and the top plate of the mechanic jacks (56) passes through the jack fixation steel plate (54) and passed with the load
Sensor (9) abut, the load transducer (9) pass through the load transducer fixed plate (53), the load transducer (9) with
Data acquisition device (17) electrical connection；
The monitoring of soil displacement unit include lower part power transmission steel plate (3-2), nitrogen gas spring (52), multiple digital display dial gauges (6),
Multiple freeze thawing displacement transmission levers (10) and multiple layering displacement transmission levers (44), the lower part power transmission steel plate (3-2) are arranged in institute
It states on top temperature-constant plate backplate (11), nitrogen gas spring (52) upper end is abutted with the load transducer (9), the nitrogen bullet
Spring (52) lower end is abutted with the lower part power transmission steel plate (3-2), and multiple digital display dial gauges (6) are uniformly arranged on institute along ring-type
It states above jack fixation steel plate (54), the freeze thawing displacement transmission lever (10) upper end is abutted with the digital display dial gauge (6), institute
It states freeze thawing displacement transmission lever (10) lower end to penetrate in the top temperature-constant plate backplate (11), on the layering displacement transmission lever (44)
End is abutted with the digital display dial gauge (6), and layering displacement transmission lever (44) lower end is stretched into the bearing tube (18), described
Digital display dial gauge (6) is electrically connected with data acquisition device (17).
2. being existed by load soil mass water-Re-power-shift assays system, feature under freezing-thawing according to claim 1
In the loading testing stand includes the bearing column of load-bearing steel plate (25) and setting in load-bearing steel plate (25) two bottom sides
(26) it is arranged on the load-bearing steel plate (25) with Level tune support castor (27), the bearing tube (18), the screw rod (4)
Lower end passes through the load-bearing steel plate (25) and, bearing column (26) upper end and the load-bearing steel plate fixed by nut (5)
(25) it is fixedly connected, bearing column (26) lower end is welded with Level tune support castor (27), the load-bearing steel plate
(25) universal level bulb (31) is provided on.
3. being existed by load soil mass water-Re-power-shift assays system, feature under freezing-thawing according to claim 1
In the electric connection line of the Soil Temperature And Moisture sensor (14), soil pressure sensor (57) and soil water potential sensor (42) is respectively provided with
There is electric connection line protecting box (15).
4. being existed by load soil mass water-Re-power-shift assays system, feature under freezing-thawing according to claim 1
In multiple Soil Temperature And Moisture sensors (14) are arranged on the first vertical plane, and multiple soil water potential sensors (42) are equal
It is arranged on the second vertical plane, multiple soil pressure sensors (57) are arranged on third vertical plane, and described first is vertical
Face, the angle of the second vertical plane and third vertical plane between any two are 120 °.
5. being existed by load soil mass water-Re-power-shift assays system, feature under freezing-thawing according to claim 1
In being provided with watertight rubber ring (38), the rubber between the bearing tube (18) and the contact surface of the load-bearing steel plate (25)
It is separated with permeable stone (21) among water supply pipe (30) and the drainage tracheae (33) and the fine sand layer (20), the rubber is mended
It is provided with moisturizing tongs (34-1) on water pipe (30), drainage exhaust tongs (34- is provided on the drainage tracheae (33)
2)。
6. being existed by load soil mass water-Re-power-shift assays system, feature under freezing-thawing according to claim 1
In the top ring thermostat tube (13) and the bottom constant temperature coil pipe (24) are copper coil pipe.
7. being existed by load soil mass water-Re-power-shift assays system, feature under freezing-thawing according to claim 1
In the freeze thawing displacement transmission lever (10) includes the first rod piece (10-1) and multiple second rod pieces (10-2), first rod piece
There is cavity, first rod piece (10-1) and the bottom second rod piece (10-2) all have groove, described at the top of (10-1)
There is groove inner wall internal thread, the groove outer wall to have external screw thread, and the second rod piece (10-2) upper end has convex block, described
Convex block outer wall is provided with the external screw thread with the screw-internal thread fit, first rod piece (10-1) and multiple second rod pieces (10-2)
It is spirally connected, is abutted with the digital display dial gauge (6) at the top of first rod piece (10-1), the second rod piece (10-2) lower end successively
It is spirally connected with the top temperature-constant plate backplate (11).
8. by load soil mass water-Re-power-shift assays method under a kind of freezing-thawing, which is characterized in that include the following steps：
1) after the assembling for completing experimental system, pure water is loaded onto in low temperature thermostat bath (39) in bottom, by data acquisition device (17)
It is connect with computer；
2) computer is opened, the temperature of data acquisition device (17) the monitoring soil body (46), moisture, pressure, soil water potential, land movement are passed through
The payload data that data and the soil body are subject to；
3) drainage exhaust tongs (34-2) are opened, keeps drainage tracheae (33) unimpeded, the soil body (46) is applied according to schedule
Load, manually control mechanical jack (56) and load consolidation carried out to the soil body (46), the draining of the soil body (46) in consolidation process
It is carried out by drainage tracheae (33) with exhaust, until the stabilization by consolidation of the soil body (46), consolidation process terminate；
4) Markov bottle (35) position is adjusted, makes Markov bottle (35) inner glass tube (36) bottom with fine sand layer (20) top at one
On horizontal plane, achieve the purpose that analog constant level of ground water feeds the soil body (46)；Bottom low temperature thermostat bath (39) is opened, according to setting
Recharge of ground water temperature to be simulated is counted, the operating temperature of setting bottom low temperature thermostat bath (39) after reaching operating temperature, is opened
Outer loop pumps, and enters pipe (32) by bottom constant temperature liquid stream and the water in Markov bottle (35) is heated or cooled down, work as temperature measurer
(41) when displays temperature reaches design value, moisturizing tongs (34-1) is opened and are supplied water, when in drainage tracheae (33)
Water level in the same horizontal plane, carries out next step with glass tube (36) bottom in Markov bottle (35)；
5) thermostatic medium alcohol is added in top low temperature thermostat (48), top low temperature thermostat (48) is opened, according to design
The operating temperature for the temperature setting top low temperature thermostat (48) that the soil body (46) are freezed after reaching operating temperature, is opened
Outer loop pump is opened, the soil body (46) is freezed, when the temperature of the soil body (46), moisture, pressure, soil water potential, entirety and layering
Displacement data, when the payload data that the soil body is subject to reaches stable, end is freezed to test, and carries out next step；
6) top low temperature thermostat (48) is closed, the thermostatic medium alcohol in the thermostat of discharge top is added water and is situated between as constant temperature
Matter；Top low temperature thermostat (48) is opened, it will be to temperature setting top low temperature constant temperature that the soil body (46) are melted according to design
The operating temperature of slot (48) after reaching operating temperature, is opened outer loop pump, is melted to the soil body (46), when the soil body (46)
Temperature reach the temperature before freezing, moisture, pressure, soil water potential, entirety and the layering displacement data and the soil body of the soil body (46) by
To payload data reach stable when, terminate melt experiment；
7) collected data are sent to computer by data acquisition device (17), are analyzed data.
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| CN201711478646.0A CN108344850B (en) | 2017-12-29 | 2017-12-29 | Water-heat-force-displacement experimental system and method for loaded soil body in freeze-thaw environment |
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| CN114018970A (en) * | 2021-11-08 | 2022-02-08 | 哈尔滨工业大学 | Multifunctional freezing low-temperature model test device for cold region |
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| CN114755092A (en) * | 2022-03-23 | 2022-07-15 | 哈尔滨商业大学 | Special device and method for seasonal frozen soil indoor test |
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