CN208872753U - A kind of experimental rig for testing roadbed filling frost-heaving deformation - Google Patents
A kind of experimental rig for testing roadbed filling frost-heaving deformation Download PDFInfo
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- CN208872753U CN208872753U CN201821490440.XU CN201821490440U CN208872753U CN 208872753 U CN208872753 U CN 208872753U CN 201821490440 U CN201821490440 U CN 201821490440U CN 208872753 U CN208872753 U CN 208872753U
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Abstract
The utility model discloses a kind of experimental rigs for testing roadbed filling frost-heaving deformation, including model casing, refrigerating plant, test specimen tube and data acquisition device, the model casing is the thermal-insulating body that cross section is in rectangle, the model casing upper end is equipped with upper cover, the upper cover bottom is fitted with rubber-plastic sponge, the rubber-plastic sponge lower surface is fitted with magnetic sealing strip, is provided with multiple sensor insertion holes on the upper lid；The model chamber interior wall is wrapped up by PU rigid foam plate, magnetic sealing strip is bonded at the top of the PU rigid foam plate, the PU rigid foam plate outer surface is fixedly installed with channel steel；Two side wall of model casing is provided with air inlet and return air inlet, and the air inlet and return air inlet have been respectively fixedly connected with blast pipe and backwind tube.The experimental rig of test roadbed filling frost-heaving deformation described in the utility model has the advantages that sample replacement is convenient, displacement measurement accuracy is high, test efficiency is high.
Description
Technical field
The utility model relates to soil test technique fields, it particularly relates to a kind of test roadbed filling frost-heaving deformation
Experimental rig.
Background technique
Frozen soil is a kind of temperature lower than 0 DEG C and soil or rock containing ice, and wherein frost zone accounts for about China, face, territory
Long-pending 53.5% is mainly distributed on vast northeast, North China, northwest and Inner Mongolia.In frozen ground regions, because of roadbed
Inhomogeneous deformation caused by frost heave and thaw collapse, extreme influence the ride comfort and durability of track structure, become influence railway
The major hidden danger of the speed of service and safety, while also very big difficulty is caused to railway maintenance maintenance.
Since railway operation environment is in field mostly, field working conditions are complicated, and carrying out field test frequently can lead to expend
A large amount of time, human and material resources and financial resources, to the method that the research of roadbed filling frost heaving characteristic mostly uses laboratory test, but mesh
The preceding device precision for testing its frost heaving amount is lower, and test efficiency is low, and temperature is easy to influence displacement measurement data, and sample is more
Inconvenience is changed, correlation test progress of research is affected.Therefore, in order to solve test problems faced, the utility model is provided
A kind of experimental rig of indoor test roadbed filling frost-heaving deformation, for measuring heterogeneity filler under condition of different temperatures
The variable quantity of frost heave obtains the Con trolling index of the key factor and frost heaving resistant that influence roadbed filling frost heave.
Utility model content
To solve problems of the prior art, the utility model provides a kind of examination for testing roadbed filling frost-heaving deformation
Experiment device has the advantages that sample replacement is convenient, displacement measurement accuracy is high, test efficiency is high.
A kind of in order to achieve the above purposes, the technical solution adopted by the utility model is: test roadbed filling frost-heaving deformation
Experimental rig, including model casing, refrigerating plant, test specimen tube and data acquisition device, the model casing are cross section in rectangle
Thermal-insulating body, the model casing upper end are equipped with upper cover, and the upper cover bottom is fitted with rubber-plastic sponge, the rubber-plastic sponge following table
Face paste closes the sealing strip that is magnetic, and is provided with multiple sensor insertion holes on the upper lid；The model chamber interior wall is by PU rigid foam plate
Package, the PU rigid foam plate top are bonded magnetic sealing strip, and the magnetic sealing strip is buccal glyph shaped structure, the PU rigid foam
Plate outer surface is fixedly installed with channel steel；Two side wall of model casing is provided with air inlet and return air inlet, the air inlet and return air inlet point
Blast pipe and backwind tube are not fixedly connected with it.
The model casing is internally provided with multiple test specimen tubes, and the test specimen tube includes bottom plate, barrel, top cap, top plate, nut
And threaded rod, the groove to match with the barrel size is provided on the bottom plate, the barrel is set in the groove, the cylinder
Two top caps are fixedly mounted in both ends at the top of wall, and central axes central symmetry of two top caps relative to the barrel is described
The position that bottom plate both ends correspond to the top cap is fixedly installed with fixing seat, and through-hole, the fixing seat are provided in the top cap
The upper correspondence through-hole is provided with threaded hole, and the threaded rod lower end is connected through a screw thread with the fixing seat, the threaded rod tip
Across through-hole by the fixed locking of the nut, the test specimen tube inside is equipped with top plate and multiple temperature sensors, the top plate
Above the temperature sensor, the horizontal cross-sectional area of wall inner portion cavity described in the area ratio of the top plate is small, described
Cover top surface center is provided with threaded hole, is equipped with displacement measuring device, institute's displacement measurement dress by screw thread on the top plate
It sets including measurement plate and measuring rod, institute's displacement measurement device is T-shaped structure, and the measuring rod lower end is equipped with and the top plate
On the screw thread that matches of threaded hole, the measuring rod lower end is connected through a screw thread with the top plate, and the measuring rod upper end is logical
It crosses the sensor insertion hole to be pierced by the upper cover and measurement plate is fixedly mounted, is fixedly installed with displacement sensing in the measurement plate
Device；
The refrigerating plant includes air storage chamber, exhaust fan, temperature control cabinet, air blower control cabinet and compressor set, the storage
It is connected between gas chamber and the model casing by the blast pipe and backwind tube, the air storage chamber and the blast pipe junction are solid
Dingan County fills the exhaust fan, and described air storage chamber one end connects the compressor set by pipeline, the temperature control cabinet with it is described
Compressor set is connected by conducting wire, and the air blower control cabinet is connect with the exhaust fan by conducting wire；
The data acquisition device includes temperature sensor, displacement sensor, displacement acquisition instrument and temperature sensor, described
Displacement sensor is connected by conducting wire with the displacement acquisition instrument；The temperature sensor passes through conducting wire and the temperature sensor
It is connected；The displacement acquisition instrument and temperature sensor pass through conducting wire and are connected with computer.
In above structure, sample filler is selected by corresponding specification, according to target moisture content, fine particle content, the compacting of sample filler
Prepared by degree, the test specimen tube is filled by way of placement in layers, multiple test specimen tubes are placed into the model casing
It is interior, the gas storage room temperature is arranged by the temperature control cabinet and is freezed, until the gas storage room temperature is reduced to target
Temperature opens the exhaust fan, by the blast pipe and the backwind tube, cold wind the air storage chamber and the model casing it
Between recycle, air themperature gradually decreases in the model casing, and the temperature sensor and the displacement acquisition instrument are passed through conducting wire
The computer is accessed, above-mentioned Acquisition Instrument and the computer are then opened, debugging is normal, temperature collection and change in displacement, examination
The frost-heaving deformation of sample is transmitted to the top plate of the test specimen tube by vertical displacement, then is transmitted to institute by institute's displacement measurement device
Displacement sensors realize the acquisition to filler frost-heaving deformation amount.
Preferably, the center of institute's displacement sensors, displacement measuring device, sensor insertion hole and test specimen tube should be at
On same central axes, so set, making traverse measurement result more accurate, influence of the external factor to displacement is reduced.
Preferably, the test specimen tube is cube structure, so set, facilitating the movement and filling work of test specimen tube.
Preferably, the test specimen tube is cylindrical structure, so set, facilitating the positioning of test specimen tube.
The beneficial effects of the utility model are:
(1) multiple test specimen tubes can be placed according to test requirements document in model test box, and sample moisture content in each test specimen tube, thin
Grain content, compactness can be different；Multiple groups test can be carried out simultaneously, efficiency is improved；
(2) frost heaving amount of roadbed filling is transmitted to test specimen tube top plate by vertical displacement, then is drawn by displacement measuring device
Model test box out is transmitted to displacement sensor, prevents temperature from improving precision to the influence of test device；
(3) rubber-plastic sponge is covered by magnetic sealing strip and is bonded by upper cover, can reach good heat insulating effect, this
Outside, when replacing sample, displacement measuring device only need to be backed out, magnetic sealing strip is opened, sample can be replaced, easy to operate, examination
Test stock utilization height.
Detailed description of the invention
Fig. 1 is mould in a kind of embodiment 1 of experimental rig for testing roadbed filling frost-heaving deformation described in the utility model
Molding box schematic diagram of internal structure；
Fig. 2 is a kind of 1 pilot scale of embodiment of experimental rig for testing roadbed filling frost-heaving deformation described in the utility model
Sample cylinder cross-sectional view；
Fig. 3 is a kind of the whole of the embodiment 1 of experimental rig for testing roadbed filling frost-heaving deformation described in the utility model
Body structural schematic diagram；
Fig. 4 is position in a kind of embodiment 1 of experimental rig for testing roadbed filling frost-heaving deformation described in the utility model
The main view of measuring system；
Fig. 5 is position in a kind of embodiment 1 of experimental rig for testing roadbed filling frost-heaving deformation described in the utility model
The bottom view of measuring system；
Fig. 6 it is described in the utility model it is a kind of test roadbed filling frost-heaving deformation experimental rig embodiment 1 in sample
The top view of cylinder；
A kind of Fig. 71 insole board of embodiment for the experimental rig for testing roadbed filling frost-heaving deformation described in the utility model
Top view；
Fig. 8 it is described in the utility model it is a kind of test roadbed filling frost-heaving deformation experimental rig embodiment 2 in sample
The top view of cylinder；
A kind of Fig. 92 insole board of embodiment for the experimental rig for testing roadbed filling frost-heaving deformation described in the utility model
Top view；
A kind of Figure 10 circuit theory process for the experimental rig for testing roadbed filling frost-heaving deformation described in the utility model
Block diagram.
Description of symbols:
1, model casing；2, rubber-plastic sponge；3, magnetic sealing strip；4, PU rigid foam plate；5, sensor insertion hole；6, upper cover；
7, refrigerating plant；8, blast pipe；9, backwind tube；10, air storage chamber；11, exhaust fan；12, air blower control cabinet；13, compressor set；
14, temperature control cabinet；15, test specimen tube；16, bottom plate；17, barrel；18, top cap；19, top plate；20, displacement measuring device；21, spiral shell
Cap；22, threaded rod；23, fixing seat；24, measurement plate；25, measuring rod；26, data acquisition device；27, displacement sensor；28,
Displacement acquisition instrument；29, temperature sensor 30, computer；31, temperature sensor；32, channel steel.
Specific embodiment
The embodiments of the present invention are described in detail with reference to the accompanying drawing.
Embodiment 1:
As shown in Fig. 1-7 and Figure 10, a kind of experimental rig for testing roadbed filling frost-heaving deformation, including model casing 1, system
Device for cooling 7, test specimen tube 15 and data acquisition device 26, model casing 1 are the thermal-insulating body that cross section is in rectangle, 1 upper end of model casing
Upper cover 6 is installed, 6 bottom of upper cover is fitted with rubber-plastic sponge 2, and 2 lower surface of rubber-plastic sponge is fitted with magnetic sealing strip 3, in upper cover 6
Sensor insertion hole 5 there are two opening；1 inner wall of model casing is wrapped up by PU rigid foam plate 4, is bonded at the top of PU rigid foam plate 4 magnetic close
Strip of paper used for sealing 3, magnetic sealing strip 3 are buccal glyph shaped structure, and 4 outer surface of PU rigid foam plate is fixedly installed with channel steel 32, and channel steel 32 is as outer
Skeleton；1 liang of side wall of model casing is provided with air inlet and return air inlet, and the air inlet and return air inlet have been respectively fixedly connected with 8 He of blast pipe
Backwind tube 9.
1 inner bottom of model casing is drawn there are two the circular mark for placing test specimen tube 15, and label should be with 15 bottom shape of test specimen tube
Shape size is identical, and mark center is located at same central axes with corresponding sensor insertion hole 5；Test specimen tube 15 is cylindrical body knot
Structure, facilitates the positioning of test specimen tube 15, and test specimen tube 15 includes bottom plate 16, barrel 17, top cap 18, top plate 19, nut 21 and threaded rod
22, the groove to match with 17 size of barrel is provided on bottom plate 16, barrel 17 is set in the groove, 17 top left and right ends of barrel
Two top caps 18 are welded, central axes central symmetry of two top caps 18 relative to barrel 17,16 left and right ends of bottom plate correspond to top cap 18
Position be welded with fixing seat 23, through-hole is provided in top cap 18, the through-hole is corresponded in fixing seat 23 and is provided with threaded hole, threaded rod 22
Lower end is connected through a screw thread with fixing seat 23, and 22 top of threaded rod passes through through-hole and locks by the way that nut 21 is fixed, in test specimen tube 15
Portion is equipped with top plate 19 and three temperature sensors 31, sample are filled in test specimen tube 15 by placement in layers mode, temperature passed
The layering embedment of sensor 31 sample designated position, top plate 19 are set to sample top；Top plate 19 is located at 31 top of temperature sensor, top plate
The horizontal cross-sectional area of 19 17 internal cavities of area ratio barrel is small, and 19 upper surface center of top plate is provided with threaded hole, on top plate 19
Displacement measuring device 20 is installed by screw thread, displacement measuring device 20 includes measurement plate 24 and measuring rod 25, displacement measurement dress
20 are set as T-shaped structure, 25 lower end of measuring rod is equipped with the screw thread to match with the threaded hole on top plate 19,25 lower end of measuring rod with
Top plate 19 is connected through a screw thread, and 25 upper end of measuring rod is pierced by upper cover 6 and welding measurement plate 24, measurement by sensor insertion hole 5
Displacement sensor 27 is fixedly installed on plate 24；
Refrigerating plant 7 includes air storage chamber 10, exhaust fan 11, temperature control cabinet 14, air blower control cabinet 12 and compressor set 13,
It is connected between air storage chamber 10 and model casing 1 by blast pipe 8 and backwind tube 9, air storage chamber 10 and 8 junction of blast pipe are fixedly mounted
Exhaust fan 11, blast pipe 8 are connect with exhaust fan 11, and 10 one end of air storage chamber passes through pipeline connect compressor group 13, temperature control cabinet
14 are connect with compressor set 13 by conducting wire, and air blower control cabinet 12 is connect with exhaust fan 11 by conducting wire；
Data acquisition device 26 includes temperature sensor 31, displacement sensor 27, displacement acquisition instrument 28 and temperature sensor
29, displacement sensor 27 is connected by conducting wire with displacement acquisition instrument 28；Temperature sensor 31 passes through conducting wire and temperature sensor 29
It is connected；Displacement acquisition instrument 28 and temperature sensor 29 are connected by conducting wire with computer 30, displacement sensor 27, displacement measurement
The center of device 20, sensor insertion hole 5 and test specimen tube 15 should be on same central axes, so that traverse measurement result is more
Accurately, influence of the external factor to displacement is reduced.
In above structure, 1 bottom of model casing draw two circular marks for determine place test specimen tube 15 position, mark
Note should be identical as 15 bottom shape size of test specimen tube, and mark center is located at same central axes with corresponding sensor insertion hole 5；
Sample filler is selected by corresponding specification, and according to target prepared by moisture content, fine particle content, compactness for sample filler, passes through layering
The mode filled fills test specimen tube 15, and two test specimen tubes 15 are placed into model casing 1, and gas storage is arranged by temperature control cabinet 14
10 temperature of room is freezed, until 10 temperature of air storage chamber is reduced to target temperature, opens exhaust fan 11, by blast pipe 8 and is returned
Air hose 9, cold wind recycle between air storage chamber 10 and model casing 1, and air themperature gradually decreases in model casing 1, by temperature sensor
29 and displacement acquisition instrument 28 computer 30 accessed by conducting wire, then open above-mentioned Acquisition Instrument and computer 30, debugging is normal, really
Recognize instrument it is working properly after, every two hours record a model casing 1 in various sample different depth temperature change, temperature collection
And change in displacement, the frost-heaving deformation of sample is transmitted to the top plate 19 of test specimen tube 15 by vertical displacement, then is filled by displacement measurement
It sets 20 and is transmitted to displacement sensor 27, realize the acquisition to filler frost-heaving deformation amount.
Embodiment 2:
As Figure 8-9, on the basis of embodiment 1, test specimen tube 15 is cube structure to the present embodiment, in model casing 1
Inner bottom is decorated with the rectangle marked for placing 15 position of test specimen tube, and label should be identical as 15 bottom shape size of test specimen tube, and marks
Note center is located at same central axes with corresponding sensor insertion hole 5；Rectangular configuration can prevent test specimen tube 15 in moving process
It slides, facilitates the movement and filling work of test specimen tube 15.
Remaining structure and working principle of embodiment 2 is the same as embodiment 1.
Specific embodiment of the present utility model above described embodiment only expresses, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.
Claims (4)
1. a kind of experimental rig for testing roadbed filling frost-heaving deformation, including model casing, refrigerating plant, test specimen tube and data acquisition
Device, which is characterized in that the model casing is the thermal-insulating body that cross section is in rectangle, and the model casing upper end is equipped with upper cover,
The upper cover bottom is fitted with rubber-plastic sponge, and the rubber-plastic sponge lower surface is fitted with magnetic sealing strip, is provided on the upper lid
Multiple sensor insertion holes；The model chamber interior wall is wrapped up by PU rigid foam plate, and bonding is magnetic close at the top of the PU rigid foam plate
Strip of paper used for sealing, the magnetic sealing strip are buccal glyph shaped structure, and the PU rigid foam plate outer surface is fixedly installed with channel steel；The model casing
Two side walls are provided with air inlet and return air inlet, and the air inlet and return air inlet have been respectively fixedly connected with blast pipe and backwind tube, the mould
Molding box is internally provided with multiple test specimen tubes, and the test specimen tube includes bottom plate, barrel, top cap, top plate, nut and threaded rod, described
The groove to match with the barrel size is provided on bottom plate, the barrel is set in the groove, and both ends are solid at the top of the barrel
Dingan County fills two top caps, central axes central symmetry of two top caps relative to the barrel, and the bottom plate both ends correspond to
The position of the top cap is fixedly installed with fixing seat, and through-hole is provided in the top cap, and the through-hole is corresponded in the fixing seat and is provided with
Threaded hole, the threaded rod lower end are connected through a screw thread with the fixing seat, and the threaded rod tip passes through through-hole described in
The fixed locking of nut, the test specimen tube inside are equipped with top plate and multiple temperature sensors, and the top plate is located at the temperature sensing
Above device, the horizontal cross-sectional area of wall inner portion cavity described in the area ratio of the top plate is small, and the cover top surface center is opened
There is a threaded hole, displacement measuring device is equipped with by screw thread on the top plate, institute's displacement measurement device includes measurement plate and survey
Gauge rod, institute's displacement measurement device are T-shaped structure, and the measuring rod lower end is equipped with to match with the threaded hole on the top plate
Screw thread, the measuring rod lower end is connected through a screw thread with the top plate, and the measuring rod upper end is inserted by the sensor
Hole is pierced by the upper cover and measurement plate is fixedly mounted, and is fixedly installed with displacement sensor in the measurement plate；
The refrigerating plant includes air storage chamber, exhaust fan, temperature control cabinet, air blower control cabinet and compressor set, the air storage chamber
It is connected between the model casing by the blast pipe and backwind tube, the fixed peace of the air storage chamber and the blast pipe junction
The exhaust fan is filled, described air storage chamber one end connects the compressor set, the temperature control cabinet and the compression by pipeline
Unit is connected by conducting wire, and the air blower control cabinet is connect with the exhaust fan by conducting wire；
The data acquisition device includes temperature sensor, displacement sensor, displacement acquisition instrument and temperature sensor, the displacement
Sensor is connected by conducting wire with the displacement acquisition instrument；The temperature sensor passes through conducting wire and the temperature sensor phase
Even；The displacement acquisition instrument and temperature sensor pass through conducting wire and are connected with computer.
2. a kind of experimental rig for testing roadbed filling frost-heaving deformation according to claim 1, which is characterized in that institute's rheme
Displacement sensor, displacement measuring device, sensor insertion hole and test specimen tube center should be on same central axes.
3. a kind of experimental rig for testing roadbed filling frost-heaving deformation according to claim 1, which is characterized in that the examination
Sample cylinder is cube structure.
4. a kind of experimental rig for testing roadbed filling frost-heaving deformation according to claim 1, which is characterized in that the examination
Sample cylinder is cylindrical structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821490440.XU CN208872753U (en) | 2018-09-12 | 2018-09-12 | A kind of experimental rig for testing roadbed filling frost-heaving deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821490440.XU CN208872753U (en) | 2018-09-12 | 2018-09-12 | A kind of experimental rig for testing roadbed filling frost-heaving deformation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208872753U true CN208872753U (en) | 2019-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821490440.XU Expired - Fee Related CN208872753U (en) | 2018-09-12 | 2018-09-12 | A kind of experimental rig for testing roadbed filling frost-heaving deformation |
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| Country | Link |
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| CN (1) | CN208872753U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111189875A (en) * | 2020-01-17 | 2020-05-22 | 西南交通大学 | Method for testing maximum frost heaving rate of graded broken stone filler of high-speed railway roadbed |
| CN113580322A (en) * | 2021-07-07 | 2021-11-02 | 太原理工大学 | High-frequency light vibration forming device and using method |
-
2018
- 2018-09-12 CN CN201821490440.XU patent/CN208872753U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111189875A (en) * | 2020-01-17 | 2020-05-22 | 西南交通大学 | Method for testing maximum frost heaving rate of graded broken stone filler of high-speed railway roadbed |
| CN111189875B (en) * | 2020-01-17 | 2021-08-10 | 西南交通大学 | Method for testing maximum frost heaving rate of graded broken stone filler of high-speed railway roadbed |
| CN113580322A (en) * | 2021-07-07 | 2021-11-02 | 太原理工大学 | High-frequency light vibration forming device and using method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190517 Termination date: 20190912 |
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| CF01 | Termination of patent right due to non-payment of annual fee |