CN103353516B - Large movable lateral uplifting composite lading slope physical model test apparatus - Google PatentsLarge movable lateral uplifting composite lading slope physical model test apparatus Download PDF
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- CN103353516B CN103353516B CN201310201039.5A CN201310201039A CN103353516B CN 103353516 B CN103353516 B CN 103353516B CN 201310201039 A CN201310201039 A CN 201310201039A CN 103353516 B CN103353516 B CN 103353516B
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A large movable lateral uplifting composite lading slope physical model test apparatus comprises a test framework, a bottom uplifting mechanism, a rear portion loading mechanism and a water level elevating simulation mechanism; the bottom of the front portion of the test frame is hinged to the test site ground surface, the test frame is formed by mutually splicing a front panel at the front portion, at least two vertically-arranged guard boards and a frame baseboard at the bottom portion, and the spacing between adjacent guard boards is adjustable; the bottom uplifting mechanism is arranged below the test frame and is used for driving the rotation of the test frame around the hinge pint at the front portion; and the rear portion loading mechanism comprises a loading steel board, an electro-hydraulic servo loading machine and a counterforce wall, the counterforce wall is arranged behind the test frame, the rear end of the electro-hydraulic servo loading machine is hinged to the counterforce wall, the front end of the electro-hydraulic servo loading machine is connected with the loading steel board, and the rear portion loading mechanism is used for applying action force to a slope physical model in the test frame from the rear end of the test frame. The apparatus is suitable for large-size slope physical models, and can realize the establishment of three-dimensional models better satisfying geometric similarity conditions than real slopes.
The invention belongs to geologic hazard model test field, relate to the test apparatus that landslide physical model test is relevant, a kind of large-scale mobilizable side direction lifting compound loading landslide physical model test device of concrete finger.
China is the multiple country of the geologic hazards such as landslide, avalanche, rubble flow, and this kind of geologic hazard of wherein coming down occupies larger proportion.In addition, due to the continuous aggravation of Human dried bloodstains, Landslide Hazards has become one of global Geological Hazards.At present, in order to effectively prevent and treat landslide, Chinese scholars attempts to utilize experimental technique to seek the Forming Mechanism on landslide, wherein landslide physical model test is to one of effective means that landslide Conduce Disciplinarian is studied, the accuracy that it both can be used for inspection theoretical analysis and numerical simulation calculation result, directly can instruct again the design and construction of engineering practice.Since the nineties in 20th century, China achieves outstanding progress in the research such as theoretical research, analog material development, experimental technique of landslide physical model test.Since 21 century, landslide physical make on, researchers to model framework design achieve a collection of achievement in research, wherein representative landslide physical model test device experiment platform and SYSTEM SUMMARY as follows.
2004, the people such as Zhang Junfeng with casing, porous disc, backstop, plate for main member discloses a kind of water induced landslide stimulation test device, on the impact on landslide, and concrete test method is proposed on this basis for simulated reservoir fluctuation in stage, upstream water supply, WATER LEVEL CHANGES.
The same year, the people such as Li Shihai have developed water induced landslide model test, the sliding mass that this experimental provision mainly comprises testing table, chamber, water system and is arranged in chamber, can conduct a research to critical pore-water pressure during landslide failure, relation between sliding mass unstability and piestic water area.
2005, Zhang Qiangyong etc. proposed a kind of combined type geomechanics model test stand device, were mainly combined by some boxlike steel stand bodies and chassis, were applicable to the simulation of Large-sized Communication tunnel, underground workshop, mine high gradient slope etc.
2006, the people such as Luo Xianqi have developed a kind of major landslip physical model experiment system considering rainfall, and this system integrates landing system, rainfall system, monitoring system, achieved integrated, the robotization of system.
2009, the people such as what full sea disclose the advanced sliding force physical simulation experiment method in a kind of landslide and device, mainly utilize change and the gliding mass displacement of internal stress on strain gauge and the sliding bed model inclination face of displacement transducer detection, achieve the simulation that overall process occurs on landslide.
2010, the people such as Liu Dongyan provided a kind of landslide simulation test device be made up of uncovered experimental box, horizontal stand, experimental box drive unit and automatic angle measurement instrument, can change the width of experimental box, automatically can also measure slope angle according to testing requirements.
2011, the human hairs such as Wang Shimei understood a kind of slope model test device be made up of front panel, rear panel, left panel, right panel, and its great advantage is to be convenient to adjustment, disassembly and assembly, conveniently to carry mobile and after testing repacking.
2011, Fan Yongbo etc. disclosed the major landslip physical model experiment system under a kind of multifactor effect comprising reservoir level fluctuation analogue unit, landslide experimental tank section, rainfall simulation unit and measuring unit.
Although the research and development of above-mentioned landslide physical model test device facilitate the development of geomechanical model test research method to a certain extent, consider above-mentioned multiple model test apparatus or system, the limitation that discovery all still exists to a certain degree or defect:
(1) conventional model test unit scale size is less, causes in process of the test landslide physical to affect significantly by the boundary effect of two body side frames; Part landslide physical model test device is only applicable to applying to teaching, adopts transparent material to be made into bench model framework to show landslide forming process, cannot carry out analog simulation to reality landslide; In process of the test, the external force-responsive of landslide physical is responsive, and trickle disturbance all can make test figure occur obvious deviation; Due to size restriction, scrutiny can not be carried out to the control structure thing in the interaction of landslide-control structure system; Landslide physical heap builds narrow space, is not easy to layout that is shaping and monitoring equipment;
(2) conventional model test unit is mostly fixed frame, the width of landslide physical framework can only be changed at most in very limited scope, the physical dimension adjusting framework can not be needed according to research, be difficult to meet the requirement that a framework is applicable to different landslide physical, so that need to develop different landslide physical frameworks for different research objects, cause the significant wastage of experimentation cost;
(3) stress condition change of coming down is difficult to simulation.Come down often not unalterable at evolutionary process China and foreign countries force boundary condition, thus the change applying in test extra acting force simulation external force condition is needed, existing test unit often not by applying external load, realizes the simulation of incomplete landslide geomechanics model;
(4) three-dimensional landslide geologic model is difficult to simulation.At present, landslide physical model test mainly extracts according to the survey data of landslide field condition the landslide physical that the crucial section of Landslide Model sets up generalization, but be limited to the limitation of traditional Landslide Model framework functions, the landslide physical of this generalization can not the stress deformation feature on actual response landslide, after carrying out the generalizing processing of plane strain model, compared with the simulation that landslide physical and reality come down, there is error.
Summary of the invention
Technical matters to be solved by this invention is just to provide a kind of large-scale mobilizable side direction lifting compound loading landslide physical model test device, above-mentioned prior art problem can be overcome, be suitable for the landslide physical of large-size, and can realize testing the size adjustment of framework and the simulation of gliding mass trailing edge loading, set up the three-dimensional space model of meeting geometric simulated condition compared with truly coming down.
For solving the problems of the technologies described above, the large-scale mobilizable side direction lifting compound loading landslide physical model test device of one provided by the invention, comprises test framework, bottom lifting mechanism, rear load mechanism and fluctuation in stage simulation mechanism; Described test frame front bottom and surface, test site hinged, it is spliced to form mutually by the chassis base of the front panel of front portion, at least two pieces of backplates vertically arranged and bottom, and the spacing of adjacent plates is adjustable; Described bottom lifting mechanism is arranged at below test framework, rotates around anterior pin joint for driving test framework; Described rear load mechanism comprises loading steel plate, electro-hydraulic loading machine and counter force wall, counter force wall is arranged at the rear of described test framework, electro-hydraulic loading machine rear end is hinged with counter force wall, front end is connected with loading steel plate, for applying acting force from test back-end framework to the landslide physical in test framework.
In technique scheme, in described backplate, have backplate chute inside two pieces of backplates of outer end, the both sides of front panel are provided with front panel side wheel, and front panel side wheel coordinates with backplate chute, for the location of front panel and outer end two pieces of backplates.
In technique scheme, described chassis base has some base plate chutes, described backplate bottom is provided with the backplate return pulley mated with base plate chute, for being installed on the spacing of different base plate chute adjustment adjacent plates by backplate; Described front panel is spliced to form by the plate of at least one sliding panel and both sides, for consistent with the spacing of outer end two backplate by arranging sliding panel quantity adjustment front panel width.
In technique scheme, the base arranged in lifting mechanism one end, described bottom and test site groove is hinged, and the other end is with to test frame rear portion bottom hinged.
In technique scheme, described bottom lifting mechanism is hydraulic jack.
In technique scheme, the hinged place of described test framework is provided with tiltmeter, for reading the elevation angle of test framework.
In technique scheme, described counter force wall is provided with by earth anchor and set bolt and adds carrier aircraft free bearing, described electro-hydraulic loading machine rear end is connected with free bearing.
In technique scheme, described fluctuation in stage simulation mechanism comprises inlet opening and osculum that front panel is offered, and inlet opening is connected external water pump mechanism with osculum, tests the fluctuation in stage in framework for realizing.
Compared with prior art, beneficial effect of the present invention is:
(1) test unit of the present invention is applicable to that length is greater than 3m, width is greater than 1m, be highly greater than the landslide physical of 2m size, meet the requirement of major landslip physical experiments, avoid medium and small landslide physical size effect obviously, comparatively large by Boundary Condition Effect, the problem that prevention and cure project is implanted cannot be considered;
(2) the test framework of test unit of the present invention can flexible assembled adjustment, there is structure opening, assemble remarkable advantage that is flexible, size adjustable, multiple landslide physical can be applicable to, and achieve the recycling of test framework, can test framework be taken apart recovery after having tested, be conducive to saving test site and the rear Landslide Model of process destruction;
(3) this test unit is by the stroke of hydraulic jack, robotization regulates the elevation angle of landslide physical, has higher control accuracy, achieves continuous, stability contorting to the test framework elevation angle, be equipped with after tiltmeter, also can real-time reception record the angle of lifting;
(4) simulation of complete and incomplete geomechanics model is achieved.This test unit both can realize complete geomechanics model research of coming down, realize the loading requirement under the incomplete geomechanics model complex working conditions in landslide by bottom lifting mechanism and rear load mechanism again, decrease the making intensity of complete geomechanics model;
(5) function of side direction lifting compound loading is possessed.The electro-hydraulic loading machine that is applied through of landslide physical rear portion stress boundary condition accurately controls, and can realize the applying of complex external force load; Traditional landslide physical model test changes the elevation angle of Landslide Model by means of only bottom lifting, and then changes the stress condition of sliding mass inside, and this test unit can realize the compound loading of bottom lifting and rear load;
(6) compared with the test framework of traditional landslide physical, the test framework flexibly changing backplate spacing of this device thus Adjustment Tests frame width, unit width can be set up according to key landslide section and generally change Landslide Model, according to landform fluctuations condition, the three-dimensional space model of meeting geometric simulated condition compared with truly coming down can be set up again;
(7) this test unit integral rigidity is high, good stability, durability are good, reusable.Because this bulking block intensity is high, rigidity large, component is accidental occurs that the possibility destroyed is very little, even if occur damaged, is also easy to repair or change; This device can be widely used in and comprises the research of the type such as landslide o earth slope, rock landslip geomechanical model test, has a extensive future, remarkable in economical benefits;
(8) this test unit can pass through the splicing of chassis base, multiple backplate, sliding panel and plate, realizes the object that single test completes the parallel experiment of many groups, adds the comparative of test group, eliminate plenty of time and workload simultaneously.
Accompanying drawing explanation
Fig. 1 is the perspective view of one embodiment of the invention.
Fig. 2 is the front view of Fig. 1 device.
Fig. 3 be Fig. 1 device middle frame base plate overlook enlarged drawing.
Fig. 4 is the cross-sectional view of 3.
Fig. 5 is that enlarged drawing is looked on a left side for backplate in Fig. 1 device.
Fig. 6 is a kind of structural representation of front panel in Fig. 1 device.
Fig. 7 is the structural representation of counter force wall in Fig. 1 device.
Fig. 8 is the vertical view of Fig. 1 device.
In figure: 1-test framework, 2-frame member axle, 3-contiguous block, 4-hydraulic jack, 5-base, 6-load steel plate, 7-electro-hydraulic loading machine, 8-add carrier aircraft free bearing, 9-counter force wall, 10-chassis base, 11-base plate chute, 12-backplate, 13-backplate chute, 14-backplate return pulley, 15-front panel, 16-front panel side wheel, 17-inlet opening, 18-osculum, 19-anchor hole, 20-earth anchor, 21-set bolt, 22-standing screw, 23-sliding panel, 24-plate.
Below in conjunction with accompanying drawing, specific embodiments of the invention are described in further detail.
As shown in Figures 1 to 8, the large-scale mobilizable side direction lifting compound loading landslide physical model test device of one of the present invention, comprises test framework 1, bottom lifting mechanism, rear load mechanism and fluctuation in stage simulation mechanism.
Test framework 1 is spliced to form mutually by the chassis base 10 of the front panel 15 of front portion, the backplate 12 of both sides and bottom.The front panel 15 of the present embodiment is made up of, by quantity adjustable front panel 15 width of sliding panel 23 the mutual grafting of plate 24 of at least one sliding panel 23 and both sides.The material that chassis base 10 preferably adopts corrosion resistant plate etc. to have high strength, not easily corrosion is made, the first-class spacing of chassis base 10 has some base plate chutes 11, backplate 12 bottom is provided with the backplate return pulley 14 mated with base plate chute 11, be installed on different base plate chutes 11 by backplate 12 and can adjust two backplate 12 spacing, and then adapt to the landslide physical of different in width.The inner side of two backplates 12 has backplate chute 13, after two backplate 12 spacing are determined, splice the front panel 15 that width is consistent with backplate 12 spacing, the outside of plate 24 is provided with front panel side wheel 16, front panel side wheel 16 coordinates with backplate chute 13, front panel 15 can be made to move forward and backward along two backplates 12, front panel 15 position can be regulated according to testing requirements thus change the length testing framework 1.The frame member axle 2 on chassis base 10 front end and the surface, test site of test framework 1 is hinged, and frame member axle 2 is fixed by standing screw 22 and test site, guarantees that testing framework 1 in process of the test is not moved.Chassis base 10 rear end connects bottom lifting mechanism.
The interior base 5 arranged of bottom lifting mechanism one end and test site groove is hinged, and the contiguous block 3 of the other end and bottom, chassis base 10 rear portion is hinged.The bottom lifting mechanism of the present embodiment is hydraulic jack 4, and its elongation and voltage stabilizing process carry out accurate control and regulation by external hydraulic control system, to regulate and control the elevation angle of test framework 1.For ease of reading and record the elevation angle of test framework 1 in real time, tiltmeter can be set at said frame rotation axis 2 place, the tiltmeter at this place utilizes its Sensor monitoring to test the corner of framework 1 around frame member axle 2, and real-time reception also records the elevation information not testing framework 1 in the same time.
Rear load mechanism comprises loading steel plate 6, electro-hydraulic loading machine 7 and counter force wall 9.Counter force wall 9 is arranged at the rear of above-mentioned test framework 1, counter force wall 9 is provided with by earth anchor 20 and set bolt 21 and adds carrier aircraft free bearing 8, as the actuator of Based on Electro-hydraulic Loading Servo System, electro-hydraulic loading machine 7 rear end is connected with free bearing 8, front end connects and loads steel plate 6, for applying acting force from test framework 1 rear end to the landslide physical in test framework 1.The present invention selects electro-hydraulic loading machine 7 but not Normal hydraulic cylinder etc. are because it is under control system controls, and can carry out coordinated multi-point loading, not only can be controlled in real time process, and can control last result well to test specimen.It has the remarkable advantages such as fast response time, output power is large, control accuracy is high, utilizes computer technology to realize degree of freedom cooperation control, loading performance is improved.In particular: first, under the condition that incomplete landslide physical or external stress boundary condition change, electro-hydraulic loading machine 7 can apply dissimilar load to model trailing edge, as simulated the notch cuttype external load of sinusoidal simple harmonic wave, the periodically Loading of dynamic loading, the constant load etc. of landslide thrust-drag margin; Secondly, because landslide destructive process has conditions of the current stage, not flash disruption, the force value of setting can not really effectively be loaded in landslide physical, therefore the stress that conventional hydraulic loaded mode cannot meticulously complete in Landslide Deformation destructive process applies, and the control system of electro-hydraulic loading machine 7 can gather the acting force between the landslide physical trailing edge soil body and electro-hydraulic loading machine 7 and regulate the size applying acting force after feeding back to control system, and make practical function consistent with test design load to the load on side slope model; Finally, the control system of electro-hydraulic loading machine 7 have recorded its displacement exact value in loading procedure synchronously, in real time, supplements and the perfect data of landslide physical data acquisition.
Fluctuation in stage simulation mechanism comprises inlet opening 17 and osculum 18 that front panel 15 is offered, and inlet opening 17 is connected external intake pump and unwatering pump respectively with osculum 18, tests the fluctuation in stage in framework 1, mimic water-depth fluctuation and souring for realizing.
The roughly process that application the present invention carries out testing is:
One, Landslide Model design and test unit assembled
1, for Research Requirements, according to the principle of similitude, the landslide scale model after generalization is drafted;
2, according to model width, splicing backplate 12, and with similarity model test result for standard, the analog material of preparation sliding bed, slide strips, gliding mass and control structure thing (such as friction pile etc.) respectively.Accurately make landslide physical according to the landslide scale model spatial shape drafted and bury the inner and surperficial monitoring equipment in landslide underground;
3, according to landslide physical width splicing sliding panel 23 and plate 24, composition meets the front panel 15 of width requirement; Promote front panel 15 until the ahead boundaries of close landslide physical; Adopt the fixed front panels 15 such as jig, and arrange that sealing adhesive tape does airtight waterproof process in front panel 15 and backplate 12, chassis base 10 contact position; At landslide physical rear portion, erection loads steel plate 6, loads steel plate 6 parallel with loading surface;
Two, test loads
4, open the control system of hydraulic jack 4, hydraulic jack 4 length continuous elongation, meanwhile test the elevation angle of framework 1 also at consecutive variations; Voltage stabilizing control can be carried out to hydraulic jack 4 when the elevation angle reaches specified angle, guarantee that its elongation remains unchanged, and then guarantee that the elevation angle of testing framework 1 remains unchanged; Elevation angle size is by tiltmeter real-time measurement, display record;
5, the thrust size applied needed for the landslide physical rear portion gone out according to theory calculate, applies constant or fluctuating load by controlling electro-hydraulic loading machine 7 at rear portion, landslide;
6, open intake pump, to the intracontour waterflooding of test framework 1, mimic water-depth rises; Close intake pump, externally drained to test framework 1, mimic water-depth declines; The discharge water yield and the working time of drainage pump is controlled according to simulated condition condition;
Three, data acquisition
7, by related equipment acquisition test data, such as, soil pressure, gliding mass inner absolute displacement and friction pile pile strain etc. is gathered;
Four, data processing
8, arrangement, analytical test data;
9, the water in test framework 1 is extracted by unwatering pump;
10, close electro-hydraulic loading machine 7, reclaim and load steel plate 6;
11, slow releasing hydraulic jack 4;
12, extract front panel 15 out, and be disassembled into sliding panel 23 and plate 24;
13, backplate 12 is dismantled, the landslide physical after then adopting artificial or mechanical system to remove destruction;
14, cleaning framework base plate 10, backplate 12, sliding panel 23, plate 24, reclaims and waits for that next time uses.
In addition, owing to chassis base 10 being provided with multiple base plate chute 11, therefore also can according to test needs, chassis base 10 inserts two or more backplate 12, and wherein as hereinbefore, the backplate 12 of inner side can not offer backplate chute 13 to two backplates 12 of outer end.After splicing sliding panel 23, plate 24, namely in test framework 1, form multiple separate space.During test, in each separate space, preparation meets the landslide physical of different tests requirement respectively, carries out the parallel experiment of being correlated with, and such as: the sliding mass of same physical dimension, changes the physical and mechanical parameter of material; The landslide physical of same physico-mechanical properties, adopts different geometric shapes; Under simulating different fluctuation in stage condition, the deformation on landslide of the same race; Whether friction skidding device is arranged, or model test when arranging the friction skidding device of multi-form, size; Arrange different landslide physical width, research boundary effect is on the impact etc. of landslide physical.The object that single test completes the parallel experiment of many groups can be realized, add the comparative of test group, eliminate plenty of time and workload simultaneously.
Core of the present invention is the test framework 1 that front panel 15, backplate 12 and chassis base 10 splice and combine, can adjust according to landslide physical size, thus be applicable to the requirement of multiple landslide physical, to set up the three-dimensional space model of meeting geometric simulated condition compared with truly coming down, and achieve the recycling of test framework 1.So its protection domain is not limited to above-described embodiment.Obviously, those skilled in the art can carry out various change and distortion to the present invention and not depart from the scope of the present invention and spirit, such as: the structure that backplate 12 spacing regulative mode adopts base plate chute 11 and backplate return pulley 14 to coordinate is convenient to install and carry out airtight waterproof process, but be not limited to this example structure, adopt other conventional fixed form to be also feasible; Similarly, the connecting method of front panel 15 is also not limited to the form of the grafting mutually of sliding panel 23 and plate 24 in embodiment, if front panel 15 width can be adjusted and with two backplates 12 inside fixing; Bottom lifting mechanism, rear load mechanism and fluctuation in stage simulation mechanism also can utilize existing mechanism to replace.If these are changed and distortion belongs in the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these changes and distortion.
1. a large-scale mobilizable side direction lifting compound loading landslide physical model test device, is characterized in that: it comprises test framework (1), bottom lifting mechanism, rear load mechanism and fluctuation in stage simulation mechanism; Described test framework (1) front bottom end and surface, test site hinged, it is spliced to form mutually by the chassis base (10) of the front panel (15) of front portion, at least two pieces of backplates (12) vertically arranged and bottom, and the spacing of adjacent plates (12) is adjustable; Described bottom lifting mechanism is arranged at test framework (1) below, rotates around anterior pin joint for driving test framework (1); Described rear load mechanism comprises loading steel plate (6), electro-hydraulic loading machine (7) and counter force wall (9), counter force wall (9) is arranged at the rear of described test framework (1), electro-hydraulic loading machine (7) rear end is hinged with counter force wall (9), front end is connected with loading steel plate (6), for applying acting force from test framework (1) rear end to the landslide physical in test framework (1).
2. large-scale mobilizable side direction lifting compound loading landslide physical model test device according to claim 1, it is characterized in that: in described backplate (12), two pieces of backplate (12) inner sides of outer end have backplate chute (13), the both sides of front panel (15) are provided with front panel side wheel (16), front panel side wheel (16) coordinates with backplate chute (13), for the location of front panel (15) with the two pieces of backplates (12) in outer end.
3. large-scale mobilizable side direction lifting compound loading landslide physical model test device according to claim 1 and 2, it is characterized in that: described chassis base (10) has some base plate chutes (11), described backplate (12) bottom is provided with the backplate return pulley (14) mated with base plate chute (11), for being installed on the spacing of different base plate chutes (11) adjustment adjacent plates (12) by backplate (12); Described front panel (15) is spliced to form by the plate (24) of at least one sliding panel (23) and both sides, for consistent with the spacing of outer end two backplate (12) by arranging sliding panel (23) quantity adjustment front panel (15) width.
4. large-scale mobilizable side direction lifting compound loading landslide physical model test device according to claim 1 and 2, it is characterized in that: the base (5) arranged in lifting mechanism one end, described bottom and test site groove is hinged, the other end is with to test framework (1) bottom, rear portion hinged.
5. large-scale mobilizable side direction lifting compound loading landslide physical model test device according to claim 3, it is characterized in that: the base (5) arranged in lifting mechanism one end, described bottom and test site groove is hinged, the other end is with to test framework (1) bottom, rear portion hinged.
6. large-scale mobilizable side direction lifting compound loading landslide physical model test device according to claim 1 and 2, is characterized in that: described bottom lifting mechanism is hydraulic jack (4).
7. large-scale mobilizable side direction lifting compound loading landslide physical model test device according to claim 1 and 2, is characterized in that: the hinged place of described test framework (1) is provided with tiltmeter, for reading the elevation angle of test framework (1).
8. large-scale mobilizable side direction lifting compound loading landslide physical model test device according to claim 1 and 2, it is characterized in that: described counter force wall (9) is provided with by earth anchor (20) and set bolt (21) and adds carrier aircraft free bearing (8), described electro-hydraulic loading machine (7) rear end with add carrier aircraft free bearing (8) and be connected.
9. large-scale mobilizable side direction lifting compound loading landslide physical model test device according to claim 1 and 2, it is characterized in that: described fluctuation in stage simulation mechanism comprises inlet opening (17) and osculum (18) that front panel (15) is offered, inlet opening (17) is connected external water pump mechanism with osculum (18), tests the fluctuation in stage in framework (1) for realizing.
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|CN201310201039.5A CN103353516B (en)||2013-05-27||2013-05-27||Large movable lateral uplifting composite lading slope physical model test apparatus|
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|CN201310201039.5A CN103353516B (en)||2013-05-27||2013-05-27||Large movable lateral uplifting composite lading slope physical model test apparatus|
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