CN203701160U - Model test device for pile foundation in frozen soil environment - Google Patents
Model test device for pile foundation in frozen soil environment Download PDFInfo
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- CN203701160U CN203701160U CN201420061845.7U CN201420061845U CN203701160U CN 203701160 U CN203701160 U CN 203701160U CN 201420061845 U CN201420061845 U CN 201420061845U CN 203701160 U CN203701160 U CN 203701160U
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Abstract
The utility model relates to the technical field of pile foundation simulation devices, in particular to a model test device for a pile foundation in a frozen soil environment. The model test device for the pile foundation in the frozen soil environment comprises one or two or more horizontal loading mechanisms, wherein each horizontal loading mechanism is used for applying horizontal loading force to a model pile and is provided with an axis extending in the loading direction. The model test device for the pile foundation in the frozen soil environment further comprises a vertical loading mechanism, wherein the vertical loading mechanism is used for applying vertical loading force to the model pile, and the vertical loading mechanism is arranged on a traveling mechanism used for compensating for horizontal displacement of the model pile. According to the model test device for the pile foundation in the frozen soil environment, the working conditions of stress of the pile foundation in the frozen oil environment can be simulated, the similarity between the simulated working conditions and the actual working conditions is high, a horizontal static loading test and a vertical static loading test can be independently accomplished, and a static loading test with the combined action of a horizontal load and a vertical load can be accomplished; when static power loading in the horizontal direction is carried out, the vertical load generated by an upper portion structure in an actual project can be simulated. The model test device for the pile foundation in the frozen soil environment can provide a good foundation for research of the bearing characteristics of the pile foundation in the frozen soil environment.
Description
Technical field
The utility model relates to pile foundation simulation device technique field, particularly a kind of frozen soil environment pile foundation model test apparatus.
Background technology
Mostly be confined under vertical or horizontal loading independent role for the load transfer mechanism of foundation pile in frozen soil environment, the analysis and research of destruction proterties, supporting capacity and inner force and displacement at present, it is little that in Practical Project, foundation pile bears merely the situation of vertical or transverse load effect, often, in bearing axial load, also bear the effect of horizontal loading.When horizontal loading and vertical load acting in conjunction are during in foundation pile, horizontal loading will make pile body produce larger moment of flexure and deflection deformation occurs.Experimental study to frozen soil environment pile foundation at present, adopts the method for field trial to be conventionally difficult for realizing, and operation sequence complexity, and cost is larger, adopts the research method of laboratory test more.
In frozen soil environment, stake – soil dynamic interaction is the problem that need study, but owing to being subject to the restriction of various conditions, lacks enough field datas, has restricted the research of this direction correlation theory, and therefore indoor model test becomes particularly important.
In Chinese periodical file " rock mechanics " the 33rd volume the 2nd interim " research of a Freezing-Melting Condition drag pile foundation level dynamic test " literary composition, announce a kind of dynamic pile testing device, this dynamic test device comprises loading frame, soil case and refrigeration system, in soil case, the soil body is housed, refrigeration system obtains frozen soil for regulating the temperature of the soil body, in soil case, be fitted with the Model Pile of vertical setting, on loading frame, be equipped with one for apply the horizontal load maintainer of horizontal loading force to Model Pile, the axis of horizontal load maintainer extends along loading direction, and the intersect vertical axis with Model Pile, horizontal load maintainer comprises loading axle, load axle for directly transmitting horizontal vibration load to Model Pile, but, this device can only carry out horizontal single-headed vibration research to Model Pile, differ far away with actual condition.
Existing dynamic pile testing device, conventionally only comprise separately vertical load maintainer or horizontal load maintainer, because in the time comprising vertical load maintainer and horizontal load maintainer simultaneously like this, in the time of the displacement of Model Pile occurred level, vertical load maintainer can not move horizontally with Model Pile, and vertical load maintainer can separate with Model Pile and can not apply vertical active force to Model Pile.
Utility model content
The purpose of this utility model is to provide a kind of frozen soil environment pile foundation model test apparatus, to improve the similarity of experimental rig simulation pile foundation actual condition.
To achieve these goals, the utility model adopts following scheme: a kind of frozen soil environment pile foundation model test apparatus, comprise the horizontal load maintainer for apply horizontal loading force to Model Pile, horizontal load maintainer has the axis extending along loading direction, also comprise the vertical load maintainer for apply vertical loading force to Model Pile, described horizontal load maintainer has one or more, and described vertical load maintainer is located at the walking mechanism for the horizontal movement of compensation model stake.
Described horizontal load maintainer comprises loading spring, the axis conllinear of the axis of loading spring and its affiliated horizontal load maintainer.
Horizontal load maintainer also comprises the reciprocating drive mechanism that loads axle and be connected with loading through-drive, and loading spring is located at and loads between axle and reciprocating drive mechanism or for being arranged between loading axle and Model Pile.
Reciprocating drive mechanism comprise axis of rotation and only spinning fit over the output wheel on axis of rotation, output wheel has for pushing up presses the outer peripheral face that drives corresponding loading axle.
Output wheel comprises core wheel and be enclosed within the antifriction bearing on core wheel, and the outer peripheral face of output wheel is made up of the outer peripheral face of antifriction bearing.
The quantity of described horizontal load maintainer is one.
Described vertical load maintainer comprises jackscrew moving up and down.
Described walking mechanism comprises that guide rail and slide-and-guide are assemblied in the slide block structure on guide rail, and slide block structure is connected with vertical load maintainer, and the axis of guide rail is parallel with the axis of horizontal load maintainer.
Described guide rail is reaction beam, slide block structure comprises centering case, on centering case, offer the bit architecture that allows passing through for reaction beam, in centering case, be provided with and roll bar, the axis that rolls bar extends along the width of reaction beam, the downside of reaction beam has and rolls the bar upper fitting face coordinating that rolls, the top of centering case is provided with upper bearing, the axis of upper bearing extends along the width of reaction beam, the downside of reaction beam has the lower fitting face coordinating with upper bearing rolling guiding, and centering case is suspended on reaction beam by upper bearing.
Described centering case is provided with for limiting the Limit Bearing of centering case to reaction beam two side shiftings, downward-extension on the axis of Limit Bearing, and Limit Bearing is located at the two sides of reaction beam and is rolled and coordinate with reaction beam.
The beneficial effects of the utility model: frozen soil environment pile foundation model test apparatus of the present utility model can be at simulation frozen soil environment pile foundation force status, and high with the similarity of actual condition, not only can complete separately level and vertical static loading experiment, also can complete the coefficient static loading experiment of level and vertical load; In the time that the quiet power that carries out horizontal direction loads, can simulate the vertical load of Practical Project middle and upper part structure generation.The bearer properties research that the utility model is frozen soil environment king-pile basis provides good basis.
Further, because horizontal load maintainer comprises loading spring, therefore can realize the change of the oscillating load amplitude of loading by changing the coefficient of rigidity of loading spring.
Further, the frictional force between antifriction bearing and loading axle is little, can guarantee that antifriction bearing contacts and transmitted load with loading stabilizer shaft in vibration processes.
Further, walking mechanism comprises guide rail and slide block, and its operating principle and simple in structure is convenient to processing.
Further, Limit Bearing can limit centering case to reaction beam two side shiftings, can avoid centering case generation sidesway, and then can avoid vertical load maintainer generation sidesway, has improved test accuracy.
Accompanying drawing explanation
Fig. 1 is the front view of the embodiment 1 of frozen soil environment pile foundation model test apparatus of the present utility model;
Fig. 2 is the rear elevation of the embodiment 1 of frozen soil environment pile foundation model test apparatus of the present utility model;
Fig. 3 is the left view (band is analysed and observe) of the embodiment 1 of frozen soil environment pile foundation model test apparatus of the present utility model;
Fig. 4 is the top view of the embodiment 1 of frozen soil environment pile foundation model test apparatus of the present utility model;
Fig. 5 is the structural representation of refrigeration system;
Fig. 6 is the front view of vertical load maintainer;
Fig. 7 is the left view of vertical load maintainer;
Fig. 8 is the sectional elevation of walking mechanism;
Fig. 9 is the longitudinal section of walking mechanism;
Figure 10 is the top view of walking mechanism;
Figure 11 is the structural representation of horizontal loading load maintainer;
Figure 12 is the syndeton schematic diagram of axial bearing and base;
Figure 13 is the structural representation of base.
The specific embodiment
The embodiment 1 of frozen soil environment pile foundation model test apparatus of the present utility model, as shown in Fig. 1-13: this frozen soil environment pile foundation model test apparatus comprises native case 1, loading frame 2, Model Pile 3, horizontal load maintainer 4, vertical load maintainer 101, cooling system 102 and walking mechanism 103.
Soil case 1 is cube structure, in native case 1, is filled with the soil body 11.Downward-extension in Model Pile 3, Model Pile 3 is provided with in native case 1, Model Pile 3 is positioned at the center position of native case 1, the bottom of Model Pile 3 is embedded in native case 1 and is fixed by the soil body in native case 1, the soil body of the top of Model Pile 3 in native case 1, stretch out, the side face of the upper end of Model Pile is provided with displacement transducer 104, and displacement transducer 104 is for horizontal movement and the vertical displacement of test model stake.
Loading frame is fixedly arranged on the periphery of native case.Loading frame 2 is steel material.Horizontal load maintainer 4 and vertical load maintainer 101 are assemblied on loading frame 2.
Horizontal load maintainer 4 is for apply horizontal loading force to Model Pile, and horizontal load maintainer 4 has the axis extending along loading direction.The axis of the axis of horizontal load maintainer 4 and Model Pile 3 is vertical setting.The quantity of horizontal load maintainer is one.In the present embodiment, extend the axis of horizontal load maintainer left and right.
Horizontal load maintainer 4 includes loading spring 5, loads axle 6 and reciprocating drive mechanism.The axis conllinear of the axis of loading spring 5 and its affiliated horizontal load maintainer.Reciprocating drive mechanism is in transmission connection with loading axle 6, and loading spring 5 is located at and loads between axle 6 and Model Pile 3.On loading spring 5, the end of a side of close reciprocating drive mechanism is provided with snap ring 7.Snap ring 7 is fixedly arranged on and loads on axle 6, and one end of loading spring 5 is that fixed end, the other end are free end, and the fixed end of loading spring is fixedly assemblied in and is loaded on axle 6 by snap ring 7, and the free end of loading spring 5 is towards Model Pile 3.Can limit the fixed end of loading spring 5 by snap ring 7 towards reciprocating drive mechanism one side shifting.Being that forward moves by loading spring towards the movement definition of Model Pile one side, is oppositely mobile by loading spring away from the movement definition of Model Pile one side.The direction that in the present embodiment, can limit loading spring 5 by snap ring 7 moves.
Reciprocating drive mechanism comprise axis of rotation 81 and only spinning fit over the output wheel 82 on axis of rotation 81, output wheel 81 has for pushing up presses the outer peripheral face that drives corresponding loading axle 6.In the present embodiment, output wheel 82 comprises core wheel 821 and is enclosed within the antifriction bearing 822 on core wheel 821, and the outer peripheral face of output wheel 82 is made up of the outer peripheral face of antifriction bearing 822.This core wheel 821 is eccentric wheel, in use, by changing the eccentric method of different sizes, can realize different eccentric throws, thereby can change the size of input load.In other embodiments, output wheel can also not comprise antifriction bearing, and the outer peripheral face of output wheel is made up of the outer peripheral face of core wheel.
In the present embodiment, axis of rotation 81 is motor shaft, on axis of rotation 81, be connected with the motor 91 for driving axis of rotation 81 to rotate, motor 91 is fixedly arranged on motor pedestal 92, motor pedestal 92 is fixedly connected with loading frame 2, motor 91 is fixedly assemblied on loading frame 2 by motor pedestal 92, and motor pedestal 92 is formed by Plate Welding.On motor 91, be connected with digital variable frequency control instrument 93, can control the rotating speed of motor 91 by digital variable frequency control instrument 93, and then can realize different loading frequencies and acceleration.In other embodiments, axis of rotation can also adopt other power source, as oil cylinder.
In the present embodiment, on loading axle 6, be arranged with the axial bearing 61 that loads axle 6 radial positions for limiting.Each loading axle 6 is provided with two along the spaced axial bearing 61 of axis that loads axle.Axially bearing 61 has the axis hole 611 that loads axle for installing, and in this axis hole 611, is provided with oil-bearing structure.Oil-bearing structure can inject lubrication oil, can play and reduce the frictional force loading between axle and axial bearing.This oil-bearing structure is oil storage tank, and this oil storage tank is annular groove 6111, is provided with steel ball 6112 in annular groove.Steel ball can reduce axial bearing and load the frictional force between axle.In other embodiments, all right arc groove of oil storage tank; Or oil-bearing structure can also be oil storage hole; Or can also save this oil-bearing structure.On motor pedestal 92, be installed with base 62, axially bearing 61 is fixedly assemblied on base 62.Base 62 is located at the bottom of axial bearing 61, is fixed together between the two by bolt.Axially bearing 61 is fixedly assemblied on motor pedestal 92 by base 62.Base 62 comprises support platform 621 and the support bar 622 of being located at support platform 621 bottoms, and this support bar 622 is hollow-core construction.
The change of the horizontal vibration load amplitude of system input can realize by two kinds of methods: the one, by changing the eccentric wheel of different sizes or realizing by the size of adjusting the OA line on eccentric wheel and the angle α between vertical direction OB line, in the time of α=0 °, eccentric throw maximum, load the stroke maximum of axle, load amplitude maximum; In the time of α=180 °, eccentric throw minimum, loads the stroke minimum of axle, load amplitude minimum; The 2nd, realize by the stiffness factor that changes loading spring.
The horizontal loading frequency of system input and acceleration can regulate by digital variable frequency control instrument, thereby can realize the size change of infinitely variable speeds and acceleration.
Vertical load maintainer 101 is for apply vertical loading force to Model Pile, and walking mechanism 103 is for the horizontal movement of compensation model stake, and vertical load maintainer 101 is located in walking mechanism 103.
Vertical load maintainer 101 comprises jackscrew 1011 moving up and down, and the bottom of jackscrew 1011 is provided with pressure sensor 1012, and this pressure sensor 1012 is for reading the size of applied vertical dead-load.
Walking mechanism 103 comprises that guide rail and slide-and-guide are assemblied in the slide block structure on guide rail, and slide block structure is connected with vertical load maintainer, and the axis of guide rail is parallel with the axis of horizontal load maintainer.In the present embodiment, guide rail is reaction beam 1031, reaction beam 1031 is fixedly assemblied on loading frame, the cross section of reaction beam 1031 is square, slide block structure comprises centering case 1032, on centering case 1032, offer pass through for reaction beam 1031 allow bit architecture, this allows the bit architecture be slot to make way 1033, in other embodiments, can also be resigning hole.The interior rolling of centering case 1032 is equipped with rolls bar 1034, the axis that rolls bar 1034 extends along the width of reaction beam 1031, the downside of reaction beam 1031 has and rolls the bar 1034 upper fitting face coordinating that rolls, the top of centering case 1032 is provided with upper bearing 1035, the axis of upper bearing 1035 extends along the width of reaction beam 1031, the downside of reaction beam 1031 has the lower fitting face coordinating with upper bearing 1035 rolling guiding, and centering case is suspended on reaction beam by upper bearing.Centering case 1032 is provided with for limiting the Limit Bearing 1036 of centering case to reaction beam front and back two side shiftings, downward-extension on the axis of Limit Bearing 1036, and Limit Bearing 1036 is located at the two sides of reaction beam and is rolled and coordinate with reaction beam.Enlarged footing 1013 by upper downward-extension between centering case 1032 and jackscrew 1011 is connected.In the present embodiment, upper bearing 1035 has two, lays respectively at the forward and backward both sides of reaction beam 1031; Limit Bearing 1036 has four, and wherein two front side and intervals that are positioned at reaction beam 1031 arrange, and another two rear side and intervals that are positioned at reaction beam 1031 arrange; The two ends of rolling bar 1034 are assemblied on centering case 1032 by end bearing 1037.
Cooling system 102 is for the soil body 11 is prepared as to frozen soil, and can regulate the temperature of frozen soil.Because cooling system 102 comprises refrigerator pipes 1021, refrigerator pipes 1021 is located in the periphery of the soil body, refrigerator pipes 1021 is provided with capillary tube 1022, between the inwall of the soil body 11 and native case 1, be provided with heat insulating material 1023, the outside of soil case 1 is provided with condenser 1024, condenser 1024 is connected with one end of refrigerator pipes 1021, condenser 1024 is connected with compressor 1027 by air inlet pipe 1026, compressor 1027 is connected with the other end of refrigerator pipes 1021 by escape pipe 1025, on compressor 1027, be also connected with temperature controller 1028, on temperature controller 1028, be connected with temperature pick up 1029, this temperature pick up is located in the soil body 11.
Process of the test while adopting the embodiment 1 of frozen soil environment pile foundation model test apparatus of the present utility model to test is as follows:
Before operation test, first carry out the temperature of the frozen soil in casing 1 to regulate.Before imposed load, first complete cooling to the soil body, first cold-producing medium will be filled with in refrigeration system, start compressor 1027, according to needed soil body subzero temperature environment, set the upper limit and the lower limit temperature of compressor operating by temperature controller 1028, by after normal temperature pressurizes refrigerant, make it to flow into condenser 1024 by air inlet pipe 1026, after fin heat radiation, gaseous refrigerant is condensed into liquid state.The cold-producing medium of high-pressure liquid enters after refrigerator pipes 1021 by capillary tube 1022, pressure sharply reduces, evaporation becomes gas, being accompanied by this process takes away the heat of inside soil body, cold-producing medium enters compressor 1037 by escape pipe 1025 afterwards, so circulate, reach the object of the cooling soil body, regulate by temperature controller 1028 frozen soil that obtains different temperatures.In process of the test, can make layer of plastic film, tightly be covered in chamber open topped place in Freezing Soils, Shi Zhuan – soil body system separates with extraneous hot air, in the subzero temperature environment of only building in refrigeration system.
One, the operating procedure applying to dead load:
Turn jackscrew, realize different vertical forces by the length that regulates screw thread, read the size of applied vertical pressure by pressure sensor, record the settling amount of Model Pile by displacement transducer.Regulate the frozen soil that obtains different temperatures by temperature controller.
Two, the operating procedure that horizontal dead load applies:
In the horizontal direction, cut off the power supply of motor, screw up with a wrench motor shaft slowly rotation, motor shaft band movable eccentric wheel rotates, and antifriction bearing 822 contacts and promotes loading spring 5 with the end that loads axle 6 load is imposed on to Model Pile.Regulate by temperature controller 1028 frozen soil that obtains different temperatures.
Three, vertical and horizontal static load acting in conjunction operating procedure:
In the horizontal direction, screw up with a wrench motor shaft slowly rotation, motor shaft band movable eccentric wheel rotates, and antifriction bearing 822 contacts and promotes loading spring 5 with the end that loads axle 6 load is imposed on to Model Pile.In the vertical direction, turns jackscrew, realizes different vertical forces by the length that regulates screw thread, reads the size of applied vertical pressure by pressure sensor.In loading procedure, in the time that Model Pile produces horizontal movement, centering case can follow Model Pile closely and move the horizontal movement that produces same direction along reaction beam, guarantees that the vertical dead-load applying is uninterrupted simultaneously.Regulate the frozen soil that obtains different temperatures by temperature controller instrument.
Four, consider press horizontal mobile load operating procedure under vertical uniform load q:
Carry out, before load test, first Model Pile being embedded in frozen soil, motor is switched on power.
In the horizontal direction, starter motor, motor shaft band movable eccentric wheel rotates, and antifriction bearing 822 contacts and promotes loading spring 5 with the end that loads axle 6 load is imposed on to Model Pile.
At vertical direction, in the time that Model Pile produces the displacement in horizontal direction, rolling bar in centering case is with reaction beam contact and produce identical displacement along reaction beam direction, four Limit Bearings of slip upper box part setting can strictly limit the lateral displacement of centering case, two tops make centering case can be suspended on reaction beam and be along the longitudinal movement to bearing, stablize continual applying thereby realize vertical load, and an application point that acts on stake top does not change.The size of vertical load is mainly by the bolt tightening length decision of jackscrew, and its size is read by the pressure sensor measurement that is connected to jackscrew lower end.
In other embodiments, loading spring can also be arranged on and load between axle and Model Pile, now, loads axle and directly apply horizontal vibration load to Model Pile when use; In addition, can also snap ring be all set at the two ends of loading spring, or only on loading spring, on the end of a side of close reciprocating drive mechanism, be provided for limiting the snap ring of loading spring towards reciprocating drive mechanism one side shifting.
In other embodiments, can also save loading spring.
In other embodiments, horizontal load maintainer can also be slider-crank mechanism or screw-nut body.
In other embodiments, horizontal load maintainer can also be two or more, and the axis of each horizontal load maintainer, except coplanar square crossing, can also have living space vertically and the situation of intersecting; Angle between the axis of adjacent level load maintainer can also be other numerical value except 0 degree and 180 degree.
In other embodiments, loading frame can also be made by other metal, as copper, aluminium alloys etc.
In other embodiments, can also save end bearing; Can also save Limit Bearing.
In other embodiments, guide rail and slide block structure can also adopt other fit structure, and as the lower surface of guide rail is provided with guide groove, the both sides on the top of slide block structure have protuberance, and protuberance stretches in guide groove and is slidably matched with guide groove; Or offer chute on the two side of slide block structure, on slide construction, there is the insertion fit structure coordinating with chute.
Claims (10)
1. a frozen soil environment pile foundation model test apparatus, comprise the horizontal load maintainer for apply horizontal loading force to Model Pile, horizontal load maintainer has the axis extending along loading direction, it is characterized in that: also comprise the vertical load maintainer for apply vertical loading force to Model Pile, described horizontal load maintainer has one or more, and described vertical load maintainer is located at the walking mechanism for the horizontal movement of compensation model stake.
2. frozen soil environment pile foundation model test apparatus according to claim 1, is characterized in that: described horizontal load maintainer comprises loading spring, the axis conllinear of the axis of loading spring and its affiliated horizontal load maintainer.
3. frozen soil environment pile foundation model test apparatus according to claim 2, it is characterized in that: horizontal load maintainer also comprises the reciprocating drive mechanism that loads axle and be connected with loading through-drive, loading spring is located at and loads between axle and reciprocating drive mechanism or for being arranged between loading axle and Model Pile.
4. frozen soil environment pile foundation model test apparatus according to claim 3, is characterized in that: reciprocating drive mechanism comprise axis of rotation and only spinning fit over the output wheel on axis of rotation, output wheel has for pushing up presses the outer peripheral face that drives corresponding loading axle.
5. frozen soil environment pile foundation model test apparatus according to claim 4, is characterized in that: output wheel comprises core wheel and be enclosed within the antifriction bearing on core wheel, and the outer peripheral face of output wheel is made up of the outer peripheral face of antifriction bearing.
6. frozen soil environment pile foundation model test apparatus according to claim 1, is characterized in that: the quantity of described horizontal load maintainer is one.
7. frozen soil environment pile foundation model test apparatus according to claim 1, is characterized in that: described vertical load maintainer comprises jackscrew moving up and down.
8. frozen soil environment pile foundation model test apparatus according to claim 6, it is characterized in that: described walking mechanism comprises that guide rail and slide-and-guide are assemblied in the slide block structure on guide rail, slide block structure is connected with vertical load maintainer, and the axis of guide rail is parallel with the axis of horizontal load maintainer.
9. frozen soil environment pile foundation model test apparatus according to claim 8, it is characterized in that: described guide rail is reaction beam, slide block structure comprises centering case, on centering case, offer the bit architecture that allows passing through for reaction beam, in centering case, be provided with and roll bar, the axis that rolls bar extends along the width of reaction beam, the downside of reaction beam has and rolls the bar upper fitting face coordinating that rolls, the top of centering case is provided with upper bearing, the axis of upper bearing extends along the width of reaction beam, the downside of reaction beam has the lower fitting face coordinating with upper bearing rolling guiding, centering case is suspended on reaction beam by upper bearing.
10. frozen soil environment pile foundation model test apparatus according to claim 9, it is characterized in that: described centering case is provided with for limiting the Limit Bearing of centering case to reaction beam two side shiftings, downward-extension on the axis of Limit Bearing, Limit Bearing is located at the two sides of reaction beam and is rolled and coordinate with reaction beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420061845.7U CN203701160U (en) | 2014-02-11 | 2014-02-11 | Model test device for pile foundation in frozen soil environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420061845.7U CN203701160U (en) | 2014-02-11 | 2014-02-11 | Model test device for pile foundation in frozen soil environment |
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| CN203701160U true CN203701160U (en) | 2014-07-09 |
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| CN201420061845.7U Withdrawn - After Issue CN203701160U (en) | 2014-02-11 | 2014-02-11 | Model test device for pile foundation in frozen soil environment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821186A (en) * | 2014-02-11 | 2014-05-28 | 河南科技大学 | Pile foundation model test device in frozen soil environment |
| CN105178366A (en) * | 2015-06-12 | 2015-12-23 | 同济大学 | Model test device for vertical long-time settling character test of pile foundation and application of model test device |
| CN106193133A (en) * | 2016-06-21 | 2016-12-07 | 长沙理工大学 | A kind of slope section bridge pile foundation three-dimensional stress model assay device |
| CN109883822A (en) * | 2019-03-29 | 2019-06-14 | 贵州民族大学 | A kind of horizontal dead load test device and method for CT scan |
-
2014
- 2014-02-11 CN CN201420061845.7U patent/CN203701160U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821186A (en) * | 2014-02-11 | 2014-05-28 | 河南科技大学 | Pile foundation model test device in frozen soil environment |
| CN105178366A (en) * | 2015-06-12 | 2015-12-23 | 同济大学 | Model test device for vertical long-time settling character test of pile foundation and application of model test device |
| CN106193133A (en) * | 2016-06-21 | 2016-12-07 | 长沙理工大学 | A kind of slope section bridge pile foundation three-dimensional stress model assay device |
| CN109883822A (en) * | 2019-03-29 | 2019-06-14 | 贵州民族大学 | A kind of horizontal dead load test device and method for CT scan |
| CN109883822B (en) * | 2019-03-29 | 2024-04-02 | 贵州民族大学 | Horizontal static load test device and method for CT scanning |
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Granted publication date: 20140709 Effective date of abandoning: 20160518 |
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