CN105259038B - Pipeline Resistant heave performance testing device under the conditions of hypergravity - Google Patents
Pipeline Resistant heave performance testing device under the conditions of hypergravity Download PDFInfo
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- CN105259038B CN105259038B CN201510760649.8A CN201510760649A CN105259038B CN 105259038 B CN105259038 B CN 105259038B CN 201510760649 A CN201510760649 A CN 201510760649A CN 105259038 B CN105259038 B CN 105259038B
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- 238000012360 testing method Methods 0.000 title claims abstract description 30
- 230000005540 biological transmission Effects 0.000 claims abstract description 81
- 238000006073 displacement reaction Methods 0.000 claims abstract description 33
- 239000002689 soil Substances 0.000 claims abstract description 29
- 238000009434 installation Methods 0.000 claims abstract description 21
- 238000009428 plumbing Methods 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 6
- 239000004927 clay Substances 0.000 claims description 4
- 229920005479 Lucite® Polymers 0.000 claims description 3
- 239000004567 concrete Substances 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 230000009183 running Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 8
- 230000005484 gravity Effects 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013401 experimental design Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
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Abstract
Resistance of soil performance testing device when being swelled the invention discloses buried pipeline under the conditions of a kind of hypergravity, belong to pipeline protuberance centrifugal test technical field.The device includes centrifuge, model casing, foundation soil body, plumbing installation, power transmission lever system, displacement tester, pipeline drawing force loading system and reaction beam.Model casing is installed in centrifugal basket, and plumbing installation is buried in model casing foundation soil body.Power transmission lever system includes axle power meter and power transmission cylinder.Displacement tester includes laser displacement sensor and laser blank film, is rigidly connected with load weighted platform.Pipeline drawing force loading system includes motor, deceleration helical riser system, screw rod, load weighted platform and the hex(agonal)screw positioned at screw rod end.Load weighted platform is fixed by bolt and reaction beam.The reaction beam is fixed by bolt and model casing.Apparatus of the present invention construction is simpler, and applicability is wide, is easy to promote, and solves the problems, such as CENTRIFUGAL ACCELERATING stage pipeclay displacement coordination.
Description
Technical field
The invention belongs to pipeline to swell centrifugal test technical field, and in particular to buried pipeline is grand under the conditions of a kind of hypergravity
Play resistance of soil performance testing device.
Background technology
Long distance pipeline is the major way and approach that oil gas transports in global range, with caliber is big, haul distance is long, pressure
High, the characteristics of throughput rate is big.But when tomography, HTHP, shallow embedding pipeline is easier to that bending deformation occurs, wherein big portion
Unstable failure form is divided to show as vertical protuberance deformation.The overlying soil body can be provided vertical during correct offer pipeline protuberance
Drag, rational pipe engineering design is aided in determining whether, targetedly proposes reinforcement measure, ensures the peace of pipe engineering
Entirely.
Centrifuge can reproduce prototype stress-strain field, can direct measurement prototype large-diameter pipeline overlying resistance of soil, be
Research large-diameter pipeline vertically swells the effective tool of characteristic.However, there has been no available for the pipeline Resistant heave on centrifuge
Energy test device, pipeline swell the normal gravity test method of test generally use of resistance of soil performance, are only capable of to small diameter pipeline
Studied；During experiment, pipeline protuberance phenomenon is mainly realized by applying the means of a vertical external force to pipeline, is managed
Road is used with loading device and is rigidly connected.If existing experiment test device is tested applied to model centrifuge, one side thousand
Jin top loading device volume and deadweight are excessive, install and adjust in high acceleration fields and be extremely inconvenient；On the other hand, by loading device
Rigidly connected limitation, displacement can not be coordinated between pipeline and the soil body in centrifuge accelerator, so as to cause experimental test result
Mistake.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide buried pipeline protuberance soil under the conditions of a kind of hypergravity
Body drag performance testing device.
The purpose of the present invention is achieved through the following technical solutions：Pipeline Resistant heave performance under the conditions of a kind of hypergravity
Test device, including centrifuge, model casing, plumbing installation, power transmission lever system, displacement tester, pipeline pulling capacity loading system
System and reaction beam.Described model casing is installed in centrifugal basket, is equipped with foundation soil body in model casing, in foundation soil body
It is embedded with plumbing installation.The plumbing installation includes model pipeline, pipeline force transmission ring and pipeline pull bar three parts；Pipeline force transmission ring
It is enclosed on outside model pipeline, pipeline pull bar mechanically connects with pipeline force transmission ring.The reaction beam is made up of two square steel, two sides
Steel is parallel to be fixed on model casing.The pipeline drawing force loading system includes being installed on motor, the deceleration spiral shell on the outside of model casing
Revolve elevator system, screw rod, load weighted platform and the hex(agonal)screw positioned at screw rod end；Motor is fixed on deceleration spiral liter
Drop in device system, deceleration helical riser system is fixed on load weighted platform, and load weighted platform passes through bolt and counter-force
Beam is fixed.Power transmission lever system includes axle power meter and power transmission cylinder；Axle power meter lower end links together with plumbing installation；Described power transmission
Cylinder includes power transmission cylinder hexagon socket head cap screw, hollow power transmission cylinder and power transmission cylinder connecting rod；Hollow power transmission cylinder passes through hexagon socket head cap screw and axle
Power meter connects, and is fixed by connecting rod and pipeline drawing force loading system, and hollow power transmission cylinder and power transmission cylinder hexagon socket head cap screw is mutual not
Contact.Displacement tester includes laser displacement sensor and laser blank film；Laser displacement sensor and load weighted platform
It is rigidly connected, laser blank film is installed on above axle power meter.
Further, described foundation soil body material need to be selected according to specific experimental condition, including sand, clay, silt
Etc. a variety of earthen foundations.
Further, described model pipeline material can be aluminium, steel, concrete, pvc or lucite etc., specific size
Selected according to test situation；Described pipeline force transmission ring internal diameter is bigger 1mm than model pipeline external diameter, is provided with the top of pipeline force transmission ring straight
Footpath 10mm screws, pipeline pull bar are mechanically connected by the screw and pipeline force transmission ring, pipeline pull bar diameter 10mm.Pipeline force transmission ring
It is made with pull bar by aluminium, deadweight is lighter, and can guarantee that the strength and stiffness needed for experiment.
Further, spacing (about 8mm), electric motor starting are left between described hollow power transmission cylinder and power transmission cylinder hexagon socket head cap screw
Before, it is not in contact with each other between the two, to ensure centrifuge in boost phase pipeclay displacement coordination.
Further, described motor is screwed with deceleration helical riser system, can be conveniently replaced.Motor is transported
Deceleration helical riser system can be driven during row, makes the displacement of screw rod generation upwardly or downwardly.The hexagonal of screw rod end
Screw is used for fixing force transfer lever system, is not produced between screw rod, power transmission cylinder connecting rod and hollow power transmission cylinder during guarantee test
Relative deformation.Load weighted platform is provided with hole at corner, is fixed by 4 a diameter of 12mm bolt and reaction beam.
Further, the reaction beam is made up of two root long 70cm, the square steel that sectional dimension is 4cm × 6cm, square steel both ends
Corresponding position is provided with screw, is fixed by 4 a diameter of 12mm bolt and model casing.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) structure of the invention is simple, strong operability, convenient disassembly, and is easy to transform, and can be opened according to original system framework
The purposes for sending out new.
(2) pipeline drawing force loading system and model casing are separate, and it is internal empty after sample preparation to avoid test model case
Between narrow dimension limitation, and be suitable for various model method of preparing sample.
(3) applicability of the present invention is wide, is applicable to the ground of a variety of soil property types such as clay, silt.
(4) set power transmission wound packages to put in power transmission lever system, on the basis of meeting that loading system is rigidly connected, realize centrifuge
Displacement coordination between pipeline and the soil body in accelerator, guarantee test test result are correctly reliable.
(5) this equipment principle is simple, available for different tube diameters, different embedding position, different buried depth than pipeline swell examination
Test, while different protuberance speed and upwaarping deformation can be simulated.
(6) cost of implementation of the invention is low, and using effect is good, is easy to promote the use of.
Brief description of the drawings
Fig. 1 is the top view of the present invention；
Fig. 2 is the A-A profiles of the present invention；
Fig. 3 is the B-B profiles of the present invention；
Fig. 4 is transmission rod system architecture detail drawing；
Fig. 5 is centrifuge operation principle schematic diagram；
In figure：Centrifuge 1；Centrifugal basket 1-1；Model casing 2；Foundation soil body 3；Plumbing installation 4；Model pipeline 4-1；Pipe
Road force transmission ring 4-2；Pipeline pull bar 4-3；Power transmission lever system 5；Axle power meter 6；Power transmission cylinder 7；Power transmission cylinder hexagon socket head cap screw 7-1；It is hollow
Power transmission cylinder 7-2；Power transmission cylinder connecting rod 7-3；Displacement tester 8；Laser displacement sensor 8-1；Laser blank film 8-2；Pipeline
Drawing force loading system 9；Motor 9-1；Deceleration helical riser system 9-2；Screw rod 9-3；Load weighted platform 9-4；Reaction beam
10。
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
As shown in Figure 1, 2, 3, the present invention is pipeline Resistant heave performance testing device under the conditions of hypergravity, including centrifuge 1,
Model casing 2, plumbing installation 4, power transmission lever system 5, displacement tester 8, pipeline drawing force loading system 9 and reaction beam 10.
Described model casing 2 is installed in the hanging basket 1-1 of centrifuge 1, and foundation soil body 3, foundation soil body are equipped with model casing 2
3 materials are selected according to specific experimental condition, include the ground of a variety of soil property types such as sand, clay, silt.In foundation soil body 3
It is embedded with plumbing installation 4.
The plumbing installation 4 includes model pipeline 4-1, pipeline force transmission ring 4-2 and pipeline pull bar 4-3 three parts.Model
Pipeline 4-1 materials can be aluminium, steel, concrete, pvc or lucite etc., and specific size selects according to test situation.Pipeline power transmission
Ring 4-2 is enclosed on outside model pipeline 4-1, and its internal diameter is bigger 1mm than model pipeline 4-1 external diameters or so, is opened at the top of pipeline force transmission ring 4-2
There are diameter 10mm screws, pipeline pull bar 4-3 is mechanically connected by the screw and pipeline force transmission ring 4-2, pipeline pull bar 4-3 diameters
10mm.Pipeline force transmission ring 4-2 and pull bar 4-3 is made by aluminium, deadweight it is lighter, and can guarantee that experiment needed for intensity and just
Degree.
As shown in figure 4, the power transmission lever system 5 includes axle power meter 6 and power transmission cylinder 7.Described power transmission cylinder 7 includes power transmission cylinder
Hexagon socket head cap screw 7-1, hollow power transmission cylinder 7-2 and power transmission cylinder connecting rod 7-3.Hollow power transmission cylinder 7-2 by hexagon socket head cap screw 7-1 with
Axle power meter 6 connects, and is fixed by connecting rod 7-3 and pipeline drawing force loading system 9.In device installation process, hollow power transmission cylinder
It must be stayed (8mm or so) at regular intervals between 7-2 and power transmission cylinder hexagon socket head cap screw 7-1, not contact condition be kept, to ensure centrifuge
1 boost phase pipeclay displacement coordination.The lower end of axle power meter 6 links together with plumbing installation 4.
As shown in Figure 1, 2, 3, described displacement tester 8 includes laser displacement sensor 8-1 and laser blank film 8-
2.Laser displacement sensor 8-1 is rigidly connected with load weighted platform 9-4, laser displacement sensor 8-1 and mould during experiment
Molding box 2 keeps geo-stationary；Laser blank film 8-2 is installed on the top of axle power meter 6, and geo-stationary is kept with plumbing installation 4.Laser
Sensor 8-1 is by sensing actual displacements of the laser blank film 8-2 come measurement model pipeline 4-1.
The pipeline drawing force loading system 9 includes being installed on motor 9-1 on the outside of model casing, deceleration helical riser system
Unite 9-2, screw rod 9-3, load weighted platform 9-4 and the hex(agonal)screw 9-5 positioned at screw rod 9-3 ends.Deceleration helical riser
System 9-2 is fixed on load weighted platform 9-4, is screwed between motor 9-1 and deceleration helical riser system 9-2,
Can be conveniently replaced.Deceleration helical riser system 9-2 can be driven in motor 9-1 runnings, make screw rod 9-3 produce upwards or
Downward displacement.The hex(agonal)screw 9-5 of screw rod 9-3 ends is used for fixing force transfer lever system 5, screw rod 9-3 during guarantee test,
Relative deformation is not produced between power transmission cylinder connecting rod 7-3 and hollow power transmission cylinder 7-2.Hole is provided with tetra- jiaos of load weighted platform 9-4
Hole, fixed by 4 a diameter of 12mm bolt and reaction beam 10.
The reaction beam 10 is made up of two root long 70cm, the square steel that sectional dimension is 4cm × 6cm, square steel both ends corresponding positions
The place of putting is provided with screw, is fixed by 4 a diameter of 12mm bolt and model casing 2.
Operation principle of the present invention is as follows：
The material of foundation soil body 3 is filled before experiment in model casing 2, when foundation soil body 3 reaches burying depth designed, is placed
Plumbing installation 4, then remaining foundation soil body 3 is covered, complete the preparation that pipeline protuberance tests preceding place model.By axle power meter 6 and pipe
Road connecting rod 4-3 is fixed with lengthening nut, while laser blank film 8-2 is placed above axle power meter 6.Pacify above model casing 2
Reaction beam 10 is filled, pipeline drawing force loading system 9 is then placed in precalculated position, and by plumbing installation 4, power transmission lever system 5
And the three of pipeline drawing force loading system 9 is connected and fixed.In device installation process, hexagon socket head cap screw 7-1 is with
Empty power transmission cylinder 7-2 can not be contacted, and must stay at regular intervals, about 8mm between the two, as shown in Figure 2,3, 4.
As shown in figure 5, model casing 2 is arranged on the hanging basket 1-1 of centrifuge 1, after connecting data collecting instrument, centrifugation is opened
Machine 1 is tested.During CENTRIFUGAL ACCELERATING, by 10 rigidly connected constraint of reaction beam, pipeline drawing force loading system 9, laser
Displacement transducer 8-1, power transmission cylinder connecting rod 7-3 and hollow power transmission cylinder 7-2 do not produce displacement deformation；Foundation soil body 3 is by super
Action of Gravity Field, corresponding sedimentation, about 5mm can be produced；Plumbing installation 4, axle power meter 6 and power transmission cylinder hexagon socket head cap screw 7-1 can be with
The sedimentation and deformation of the soil body and sink.Before experiment, nothing connects between hexagon socket head cap screw 7-1 bolt head and hollow power transmission cylinder 7-3
Touch, and leave enough spacing between the two, thus in the CENTRIFUGAL ACCELERATING stage pipeline pulling capacity loading system 9 without limitation on plumbing installation
4 displacement, displacement coordination, the accuracy of guarantee test result can be kept between pipeline and the soil body.Centrifuge 1 accelerates to setting G
Value, after the soil body no longer deforms, motor 9-1 is opened, 9 screw rod 9-3 is under motor 9-1 drive on drawing force loading system
Start to shift up, power transmission cylinder connecting rod 7-3 and hollow power transmission cylinder 7-2 are also moved.After a period of time, hollow power transmission cylinder
7-2 starts to contact with power transmission cylinder hexagon socket head cap screw 7-1, and plumbing installation 4 is acted on by uplift force and at the uniform velocity shifted up with screw rod 9-3.
During being pulled out on pipeline, laser displacement sensor 8-1 and axle power meter 6 can measure displacement and the axle power of pipeline in real time, until position
Shifting reaches experimental design value, closes motor, stops experiment.
Claims (6)
1. pipeline Resistant heave performance testing device under the conditions of a kind of hypergravity, it is characterised in that including centrifuge (1), model casing
(2), plumbing installation (4), power transmission lever system (5), displacement tester (8), pipeline drawing force loading system (9) and reaction beam
(10)；Described model casing (2) is installed in centrifuge (1) hanging basket (1-1), and foundation soil body (3) is equipped with model casing (2),
Plumbing installation (4) is embedded with foundation soil body (3)；The plumbing installation (4) includes model pipeline (4-1), pipeline force transmission ring (4-2)
And pipeline pull bar (4-3) three parts；It is outside that pipeline force transmission ring (4-2) is enclosed on model pipeline (4-1), pipeline pull bar (4-3) with
Pipeline force transmission ring (4-2) mechanically connects；The reaction beam (10) is made up of two square steel, and two square steel are parallel to be fixed on model casing
(2) on；The pipeline drawing force loading system (9) includes being installed on motor (9-1), the deceleration helical riser on the outside of model casing
System (9-2), screw rod (9-3), load weighted platform (9-4) and the hex(agonal)screw (9-5) positioned at screw rod (9-3) end；Electricity
Machine (9-1) is fixed in deceleration helical riser system (9-2), and deceleration helical riser system (9-2) is fixed on load loading
On platform (9-4), load weighted platform (9-4) is fixed by bolt and reaction beam (10)；Power transmission lever system (5) includes axle power meter
And power transmission cylinder (7) (6)；Axle power meter (6) lower end links together with plumbing installation (4)；Described power transmission cylinder (7) includes power transmission cylinder
Hexagon socket head cap screw (7-1), hollow power transmission cylinder (7-2) and power transmission cylinder connecting rod (7-3)；Hollow power transmission cylinder (7-2) passes through interior hexagonal
Bolt (7-1) is connected with axle power meter (6), fixed by connecting rod (7-3) and pipeline drawing force loading system (9), hollow power transmission
Cylinder (7-2) and power transmission cylinder hexagon socket head cap screw (7-1) are not in contact with each other；Displacement tester (8) includes laser displacement sensor (8-1)
With laser blank film (8-2)；Laser displacement sensor (8-1) is rigidly connected with load weighted platform (9-4), laser blank film
(8-2) is installed on above axle power meter (6).
2. pipeline Resistant heave performance testing device under the conditions of hypergravity according to claim 1, it is characterised in that described
Foundation soil body (3) material includes sand, clay, silt.
3. pipeline Resistant heave performance testing device under the conditions of hypergravity according to claim 1, it is characterised in that described
Model pipeline (4-1) material is aluminium, steel, concrete, pvc or lucite；Described pipeline force transmission ring (4-2) internal diameter compares model
Pipeline (4-1) big 1mm of external diameter, pipeline force transmission ring (4-2) top are provided with diameter 10mm screws, and pipeline pull bar (4-3) passes through the spiral shell
Hole mechanically connects with pipeline force transmission ring (4-2), pipeline pull bar (4-3) diameter 10mm；Pipeline force transmission ring (4-2) and pull bar (4-3)
It is made by aluminium.
4. pipeline Resistant heave performance testing device under the conditions of hypergravity according to claim 1, it is characterised in that described
Spacing is left between hollow power transmission cylinder (7-2) and power transmission cylinder hexagon socket head cap screw (7-1), before motor (9-1) starts, is not connect mutually between the two
Touch.
5. pipeline Resistant heave performance testing device under the conditions of hypergravity according to claim 1, it is characterised in that described
Motor (9-1) is screwed with deceleration helical riser system (9-2)；Deceleration can be driven in motor (9-1) running
Helical riser system (9-2), make the displacement of screw rod (9-3) generation upwardly or downwardly；The hex(agonal)screw of screw rod (9-3) end
(9-5) is used for fixing force transfer lever system (5), screw rod (9-3) during guarantee test, power transmission cylinder connecting rod (7-3) and hollow
Relative deformation is not produced between power transmission cylinder (7-2)；Hole is provided with load weighted platform (9-4) corner, passes through 4 a diameter of 12mm
Bolt and reaction beam (10) it is fixed.
6. pipeline Resistant heave performance testing device under the conditions of hypergravity according to claim 1, it is characterised in that described anti-
Power beam (10) is made up of two root long 70cm, the square steel that sectional dimension is 4cm × 6cm, and square steel both ends corresponding position is provided with screw,
It is fixed by 4 a diameter of 12mm bolt and model casing (2).
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| CN201510760649.8A CN105259038B (en) | 2015-11-10 | 2015-11-10 | Pipeline Resistant heave performance testing device under the conditions of hypergravity |
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| CN201510760649.8A CN105259038B (en) | 2015-11-10 | 2015-11-10 | Pipeline Resistant heave performance testing device under the conditions of hypergravity |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109285436B (en) * | 2018-11-08 | 2022-05-17 | 南京大学 | Physical simulation experiment device and method for walking and sliding structure in hypergravity environment |
| CN110261238B (en) * | 2019-06-20 | 2024-04-05 | 浙江大学 | Material performance testing system under supergravity environment fixed type multi-field coupling effect |
| CN110243413B (en) * | 2019-06-27 | 2021-04-16 | 浙江大学 | Monitoring device and monitoring method for physical state of supergravity centrifugal model |
| CN115184583A (en) * | 2022-06-30 | 2022-10-14 | 浙江大学 | High-temperature pipeline in-place stability simulation device and method under temperature and mechanical load |
| CN116793837B (en) * | 2023-06-07 | 2024-04-05 | 中国科学院力学研究所 | Dynamic stress simulation device and method for pipeline in soft clay seabed environment |
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| CN103411551A (en) * | 2013-08-27 | 2013-11-27 | 西南交通大学 | Soil body sample tiny deformation imaging detecting device and method |
| CN104142356A (en) * | 2014-06-26 | 2014-11-12 | 水利部交通运输部国家能源局南京水利科学研究院 | Centrifugal simulation system for freeze thawing deformation of water conveyance canal in salty-cold region |
| CN104359638A (en) * | 2014-10-21 | 2015-02-18 | 中国电建集团成都勘测设计研究院有限公司 | Overweight force field vibration-table loading device |
| CN104655036A (en) * | 2015-01-26 | 2015-05-27 | 南京大学 | Deformation quasi-distributed fiber optic sensing system in geotechnical centrifuge model body |
| CN205209883U (en) * | 2015-11-10 | 2016-05-04 | 浙江大学 | Anti uplift capability test device of pipeline under hypergravity condition |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3402519B2 (en) * | 1994-07-12 | 2003-05-06 | 西松建設株式会社 | Shield excavation model test method and apparatus |
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| CN103411551A (en) * | 2013-08-27 | 2013-11-27 | 西南交通大学 | Soil body sample tiny deformation imaging detecting device and method |
| CN104142356A (en) * | 2014-06-26 | 2014-11-12 | 水利部交通运输部国家能源局南京水利科学研究院 | Centrifugal simulation system for freeze thawing deformation of water conveyance canal in salty-cold region |
| CN104359638A (en) * | 2014-10-21 | 2015-02-18 | 中国电建集团成都勘测设计研究院有限公司 | Overweight force field vibration-table loading device |
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