CN102928572B - Hydraulic-lifting self-weight loading device for landslide physical model test - Google Patents
Hydraulic-lifting self-weight loading device for landslide physical model test Download PDFInfo
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- CN102928572B CN102928572B CN201210414258.7A CN201210414258A CN102928572B CN 102928572 B CN102928572 B CN 102928572B CN 201210414258 A CN201210414258 A CN 201210414258A CN 102928572 B CN102928572 B CN 102928572B
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Abstract
The invention discloses a hydraulic-lifting self-weight loading device for a landslide physical model test. The hydraulic-lifting self-weight loading device for a landslide physical model test comprises a base, a lifting mechanism, an angle adjustment mechanism and a thrust loading mechanism. The lifting mechanism is arranged on the base. An upper end of the lifting mechanism is connected to the angle adjustment mechanism. The angle adjustment mechanism comprises a support plate, a sliding panel and an upper hydraulic expansion link. The support plate is connected to the upper end of the lifting mechanism. A front end of the support plate is hinged to a front end of the sliding panel by a rotation shaft. A lower end of the upper hydraulic expansion link is fixed to the support plate and an upper end of the upper hydraulic expansion link supports the bottom of the sliding panel. Through expansion of the upper hydraulic expansion link, an included angle between the support plate and the sliding panel can be elastically adjusted. The thrust loading mechanism comprises a loading platform for bearing heavy items. The bottom surface of the loading platform is in a slip fit relationship with the top surface of the sliding panel and the loading platform can slide forward or backward along the sliding panel. The hydraulic-lifting self-weight loading device for a landslide physical model test can conveniently and fast adjust a value and a direction of a thrust force on a trailing edge of a landslide physical model, makes a thrust force accord with actual edge conditions and provides a stable loading force.
Description
Technical field
The invention belongs to geologic hazard model test field, refer to a kind of landslide physical model test hydraulic lift deadweight charger particularly.
Background technology
Landslide physical model test belongs to the category of geomechanical model test, its theory originates from the structural model test early in the twentieth century set up, and develops gradually at present and extends many research directions such as landslide site-models test, landslide floor friction model test, landslide architecture model test, landslide centrifugal model test and landslide unified model test.Wherein, landslide architecture model test refers in common gravity field, by adopting the analog material analogue formation meeting criterion of similarity in frame model groove, measures its distortion and each mechanics parameters when model meets Main Boundaries conditional likelihood.This test can observe the motion feature of gliding mass in sliding process intuitively, and the parameter such as stress, strain, displacement on acquisition landslide that also can be quantitative, can illustrate from the angle of quantitative and qualitative analysis the mechanism coming down and breed.
Under the architecture model test condition of landslide, landslide physical is generally deform under force conditions outside or destroy.The major way of External Force Acting has: the seismic event of mechanical shock or blasting from simulation; Change the seepage effect that the water-level fluctuation of lower portion height of water level simulated reservoir causes; Seepage effect under rainfall simulator simulated rainfall conditions; The mode of artificial preloading provides Thrust of Landslide at landslide physical trailing edge; On landslide, trailing edge arranges steel plate, applies Thrust of Landslide etc. under hydraulic jack or the effect of MTS hydraulic servo thrust device.
Wherein, also there is following limitation or defect in the mode for landslide physical trailing edge applied thrust:
(1) thrust of existing landslide physical trailing edge loads and control system often complex structure, complex operation, and the landslide trailing edge thrust be difficult to meet fast, stablize, continuing loads requirement;
(2) although the mode of the artificial preloading of existing employing can apply stable acting force at landslide trailing edge, accurate control is difficult to the size of Thrust of Landslide and direction, apply external force boundary condition do not conform to the actual conditions.
Publication number is that the Chinese patent application of CN102681028A discloses the light test unit of a kind of multi-state frame-type landslide geomechanics model, it comprises dead-weight horizontal addload mechanism, dead-weight horizontal addload mechanism comprises carrying platform and by the chute of they sup-port above the tank of right side, chute is to frame beam test gantry tilt, and vergence direction is consistent with Landslide Model trailing edge slide strips direction.The bottom surface of carrying platform coordinates with chute, can be free to slide along chute; The end face of carrying platform is surface level or concavity, for carrying the object through demarcating after weight, make it to glide along chute with carrying platform under deadweight condition, acted on Landslide Model by carrying platform front panel, and the gravity covering preloading above provides corresponding horizontal loading along the component of chute horizontal direction.
Summary of the invention
Technical matters to be solved by this invention is just to provide a kind of landslide physical model test hydraulic lift deadweight charger, the thrust size and Orientation of landslide physical trailing edge can be adjusted easily and quickly, the thrust of applying is consistent with actual boundary condition, and loading force is stablized.
For solving the problems of the technologies described above, a kind of landslide physical model test hydraulic lift deadweight charger provided by the invention, comprises base, elevating mechanism, angle adjusting mechanism and thrust load maintainer; Described elevating mechanism is positioned on base, elevating mechanism upper end connection angle governor motion, for driving the lifting of angle adjusting mechanism; Described angle adjusting mechanism comprises back up pad, slidable panels and top hydraulically extensible bar, back up pad is connected with the upper end of elevating mechanism, it is hinged that rotation axis is passed through in the front end of back up pad and the front end of slidable panels, the lower end of described top hydraulically extensible bar and the bottom that back up pad is fixed, upper end is supported in slidable panels, for by the angle between the telescopic adjustment back up pad of top hydraulically extensible bar and slidable panels; Described thrust load maintainer comprises the weighted platform for carrying weight, the bottom surface of weighted platform and the end face of slidable panels is slidably matched, can along slidable panels slide anteroposterior.
In technique scheme, the bottom surface of described weighted platform is provided with some row's chutes, the end face of described slidable panels has corresponding some round grooves, and arrange ball in hole slot, the bottom surface of weighted platform and the end face of slidable panels are slidably matched by described chute and ball.
In technique scheme, the rear end of described weighted platform is provided with mortise lock, temporary fixed for weighted platform and slidable panels.
In technique scheme, described back up pad has one group of draw-in groove, fixing for top hydraulically extensible bar diverse location on the supporting plate.Object is in order to the selectable scope changing adjustment angle, when top hydraulically extensible bar is arranged at anterior draw-in groove for adjusting wide-angle, when being arranged at the draw-in groove at rear portion for adjusting low-angle.
In technique scheme, described back up pad is connected with the upper end of elevating mechanism by back up pad draw-in groove; The upper end of described back up pad draw-in groove and elevating mechanism is fixed, back up pad be positioned at back up pad draw-in groove, can along back up pad draw-in groove slide anteroposterior to adjust back up pad position.
In technique scheme, described top hydraulically extensible bar is hydraulic jack.
In technique scheme, described elevating mechanism is double shear fork elevating mechanism; Double shear fork elevating mechanism comprises two groups of scissors forks and lower hydraulic expansion link, often organizes scissors fork and consists of the pinned connection at middle part two scissor jibs, be also provided with some bars that reinforces the connection between two scissor jibs; The scissors fork upper end of top is connected with angle adjusting mechanism, upper end thereof pitched by the scissors of lower end and below, the scissors fork lower-end rear portion of below is fixed on base by rotating shaft, the scissors of below fork lower-end front portion by pulley and base contacts, can along base slide anteroposterior; The bar that reinforces the connection that the upper end of described lower hydraulic expansion link and top scissors are pitched is hinged, and the lower end of lower hydraulic expansion link and below scissors are pitched, the bar that reinforces the connection at pulley position place is hinged.
Further, described lower hydraulic expansion link is hydraulic jack.
In technique scheme, described rotation axis place is provided with angle dial, for the reading of angle between back up pad and slidable panels.
In technique scheme, below described base, be provided with several rows travelling wheel.
Compared with prior art, beneficial effect of the present invention is:
(1) this charger can be applicable to landslide architecture model test, by trailing edge dead-weight controlled loading simulation landslide inertial thrust, realizes the research of the incomplete geomechanics model in landslide, greatly reduces the making intensity of complete geomechanics model;
(2) this deadweight charger structure is simple, and be easy to operation, the equipment that loading procedure more traditional employing hydraulic jack etc. directly load is more stable;
(3) this deadweight charger achieves continuous, accurate, the Sustainable Control loading height and load angle by two groups of hydraulically extensible bars, makes the thrust of applying and actual boundary condition meet well;
(4) the landslide physical thrust that this deadweight charger is applicable to differing heights loads, for the Landslide Model of different sliding surface height without the need to making the charger of differing heights one by one;
(5) this deadweight charger is applicable to the Landslide Model of different sliding surface angle, without the need to making the charger of different angles one by one;
(6) in this deadweight charger, the bottom surface of weighted platform and the end face of slidable panels are slidably matched by chute and ball and use, and reduce the frictional resistance effect in weighted platform downslide process greatly, effectively convert gravity load to thrust;
(7) in this deadweight charger, the rear end of weighted platform is provided with mortise lock, achieves the temporary fixed of weighted platform and slidable panels easily;
(8) in test by the quality of adjustment weighted platform top weight, can realize landslide physical trailing edge not the same period subordinate load hierarchical loading;
(9) this deadweight charger is as an independent system, and with landslide physical framework apart, durability is good, reusable;
(10) because this bulking block intensity is high, rigidity large, component occurs that the possibility destroyed is very little once in a while, even if occur damaged, is also easy to repair or change;
(11) setting of base bottom row travelling wheel, is convenient to movement and the transport of whole device;
(12) this deadweight charger can be widely used in the thrust loading comprised in the type such as landslide o earth slope, rock landslip geomechanical model test, has a extensive future, remarkable in economical benefits.
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 is the rear view of Fig. 1 device.
Fig. 4 is the left view of Fig. 1 device.
Fig. 5 is the postrotational vertical view of Fig. 1 device.
Fig. 6 is the using state schematic diagram of Fig. 1 application of installation when the architecture model that comes down is tested.
In figure: 1-weighted platform, 2-mortise lock, 3-chute, 4-ball, 5-rotation axis, 6-slidable panels, 7-top hydraulic jack, 8-lifting jack draw-in groove, 9-back up pad, 10-back up pad draw-in groove, 11-set bolt, 12-scissor jib, 13-bearing pin, 14-reinforce the connection bar, 15-lower hydraulic lifting jack, 16-hydraulic jack oil push tube, 17-pulley, 18-base, 19-road wheel, 20-test framework, 21-sliding bed, 22-gliding mass, 23-slide strips.
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention are described in further detail.
As shown in Figures 1 to 5, a kind of landslide physical model test hydraulic lift deadweight charger of the present invention, comprises base 18, elevating mechanism, angle adjusting mechanism and thrust load maintainer, as follows specifically.
Several rows travelling wheel 19 is provided with, so that the movement of whole device below base 18.
Elevating mechanism is positioned on base 18, and the elevating mechanism of the present embodiment is double shear fork elevating mechanism, and it comprises two groups of scissors forks and lower hydraulic expansion link.Often organize scissors fork to be connected and composed by the bearing pin 13 of two scissor jibs 12 by middle part, between two scissor jibs 12, be also provided with some bars 14 that reinforces the connection.The scissors fork upper end of top is connected with angle adjusting mechanism, upper end thereof pitched by the scissors of lower end and below, the scissors fork lower-end rear portion of below is fixed on base 18 by rotating shaft, and the scissors of below fork lower-end front portion is contacted with base 18 by pulley 17, can along base 18 slide anteroposterior.The lower hydraulic expansion link of the present embodiment is lower hydraulic lifting jack 15.The bar 14 that reinforces the connection that the upper end of lower hydraulic lifting jack 15 and top scissors are pitched is hinged, and the lower end of lower hydraulic lifting jack 15 and below scissors are pitched, the bar 14 that reinforces the connection of pulley 17 position is hinged.Stretching by lower hydraulic lifting jack 15, double shear fork elevating mechanism can drive the lifting of angle adjusting mechanism.
The angle adjusting mechanism of the present embodiment comprises back up pad draw-in groove 10, back up pad 9, slidable panels 6 and top hydraulically extensible bar.Back up pad draw-in groove 10 is pitched upper end with the top scissors of above-mentioned elevating mechanism and is fixed, and back up pad 9 is positioned at back up pad draw-in groove 10, along back up pad draw-in groove 10 slide anteroposterior, after back up pad 9 adjusts to correct position, can fixes with set bolt 11.It is hinged that rotation axis 5 is passed through in the front end of back up pad 9 and the front end of slidable panels 6.The top hydraulically extensible bar of the present embodiment is top hydraulic jack 7, the lower end of top hydraulic jack 7 and the bottom that back up pad 9 is fixing, upper end is supported in slidable panels 6, by the angle between the flexible adjustable support plate 9 of top hydraulic jack 7 and slidable panels 6, to be applicable to different landslide, slide strips 23 inclination angle.Angle dial (not shown in the figures anticipate out) is installed at rotation axis 5 place, the reading of angle between back up pad 9 and slidable panels 6 can be carried out.Back up pad 9 has one group of lifting jack draw-in groove 8, can be used for top hydraulic jack 7 diverse location fixing in back up pad 9.
The thrust load maintainer of the present embodiment comprises the weighted platform 1 for carrying weight, and the inclination angle of weighted platform 1 bottom surface should be identical with slide strips 23 inclination angle of Landslide Model.The bottom surface of weighted platform 1 is provided with some row's chutes 3, the end face of above-mentioned slidable panels 6 has corresponding some round grooves, arrange ball 4 in hole slot, the bottom surface of weighted platform 1 and the end face of slidable panels 6 are slidably matched by chute 3 and ball 4, and weighted platform 1 can be made along slidable panels 6 slide anteroposterior.The end face of weighted platform 1 is surface level or concavity, for carrying the object through demarcating after weight, make it to glide along slidable panels 6 with weighted platform 1 under deadweight condition, acted on Landslide Model by weighted platform 1 front panel, and the gravity covering preloading above provides corresponding horizontal loading along the component of slidable panels 6 horizontal direction.Also be provided with mortise lock 2 in the rear end of weighted platform 1, before using for device, weighted platform 1 and slidable panels 6 is temporary fixed.
Above-mentioned top hydraulic jack 7 and lower hydraulic lifting jack 15 are connected to hydraulic jack oil push tube 16, are controlled by the stroke of external hydraulic control system to two hydraulic jack 7,15.
The roughly process applying the present invention to landslide architecture model test is:
One, early-stage preparations
1, for Research Requirements, according to the principle of similitude, the landslide scale model after generalization is drafted; With similarity model test result for standard, preparation sliding bed 21, slide strips 23, gliding mass 22 analog material respectively.The analog material that preparation is even, water percentage is constant is adopted to make Landslide Model according to the landslide scale model spatial shape drafted;
2, measure the inclination angle of Landslide Model trailing edge slide strips 23, make corresponding weighted platform 1;
Two, the adjustment of device is with fixing
3, deadweight charger of the present invention is pushed into the assigned address of test framework 20, and just to landslide trailing edge, by locked for the road wheel 19 bottom deadweight charger fixing;
4, regulated the stroke of lower hydraulic lifting jack 15 by external hydraulic control system, make back up pad 9 increase highly gradually, stop applying oil pressure when back up pad 9 height and the slide strips 23 on landslide are highly consistent and keep fixing;
5, the position of horizontal adjustment back up pad 9, is made back up pad 9 just contact with landslide trailing edge slide strips 23, back up pad 9 is fixed by set bolt 11;
6, according to the inclination angle of slide strips 23, back up pad 9 is selected suitable lifting jack draw-in groove 8, and place top hydraulic jack 7 in lifting jack draw-in groove 8;
7, regulated the stroke of top hydraulic jack 7 by external hydraulic control system, and then reach the object at the inclination angle changing slidable panels 6.In the process, advise that setting angle index dial reads the inclination angle of slidable panels 6 on rotation axis 5, the inclination angle of slidable panels 6 is identical with the inclination angle of weighted platform 1 bottom surface;
Three, thrust loading process
8, demarcate weighted platform 1 weight, and load size according to Landslide Model trailing edge thrust, the weight required for weighing;
9, on weighted platform 1, vertically, the weight demarcated slowly is placed;
10, open the mortise lock 2 at weighted platform 1 rear portion, hand steered weighted platform 1 make its slip until with landslide trailing edge contact after, unclamp both hands, until Landslide Deformation or destruction.It should be noted that the end face of weighted platform 1 should be not less than gliding mass 22 apical side height in order to avoid gliding mass 22 in loading procedure to extrude from weighted platform 1 top, accordingly, when making weighted platform 1, suitably can improve the height of its vertical loading surface;
Four, off-test
11, the weight of preloading on first removal weighted platform 1, then by weighted platform 1 removal;
12, the oil pressure of top hydraulic jack 7 is first discharged, then removal top hydraulic jack 7;
13, the oil pressure of lower hydraulic lifting jack 15 is discharged;
14, unclamp the braking of base 18 bottom row travelling wheel 19, this deadweight charger is moved to appointed place.
Core of the present invention is the setting of elevating mechanism and angle adjusting mechanism, to make to adopt from the thrust size and Orientation of reloading continuously, accurately adjustable, the thrust of applying is consistent with actual boundary condition, and loading force is stable.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: elevating mechanism is not limited to the double shear fork structure described in embodiment, and adopt other conventional structures, the controllable lift for back up pad 9 is also feasible; Sliding matching mode between weighted platform 1 and slidable panels 6 is also not limited to chute 3 in embodiment and ball 4, as long as be convenient to the relative slide anteroposterior of the two; Upper and lower part hydraulically extensible bar adopts other hydraulic telescopic machanisms such as Electrohydraulic push rod also can realize technical solution of the present invention etc.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.
Claims (9)
1. a landslide physical model test hydraulic lift deadweight charger, is characterized in that: comprise base (18), elevating mechanism, angle adjusting mechanism and thrust load maintainer, described elevating mechanism is positioned on base (18), elevating mechanism upper end connection angle governor motion, for driving the lifting of angle adjusting mechanism, described angle adjusting mechanism comprises back up pad (9), slidable panels (6) and top hydraulically extensible bar, back up pad (9) is connected with the upper end of elevating mechanism, it is hinged that rotation axis (5) is passed through in the front end of back up pad (9) and the front end of slidable panels (6), the lower end of described top hydraulically extensible bar and back up pad (9) are fixed, upper end is supported in the bottom of slidable panels (6), for passing through the angle between the telescopic adjustment back up pad (9) of top hydraulically extensible bar and slidable panels (6), described back up pad (9) has one group of draw-in groove, for top hydraulically extensible bar fixing at the upper diverse location of back up pad (9), described thrust load maintainer comprises the weighted platform (1) for carrying weight, the bottom surface of weighted platform (1) and the end face of slidable panels (6) is slidably matched, can along slidable panels (6) slide anteroposterior.
2. a kind of landslide physical model test hydraulic lift deadweight charger according to claim 1, it is characterized in that: the bottom surface of described weighted platform (1) is provided with some row's chutes (3), the end face of described slidable panels (6) has corresponding some round grooves, arrange ball (4) in hole slot, the bottom surface of weighted platform (1) and the end face of slidable panels (6) are slidably matched by described chute (3) and ball (4).
3. a kind of landslide physical model test hydraulic lift deadweight charger according to claim 1, is characterized in that: the rear end of described weighted platform (1) is provided with mortise lock (2), temporary fixed for weighted platform (1) and slidable panels (6).
4. a kind of landslide physical model test hydraulic lift deadweight charger according to claim arbitrary in claims 1 to 3, is characterized in that: described back up pad (9) is connected with the upper end of elevating mechanism by back up pad draw-in groove (10); The upper end of described back up pad draw-in groove (10) and elevating mechanism is fixed, back up pad (9) be positioned at back up pad draw-in groove (10), can along back up pad draw-in groove (10) slide anteroposterior to adjust back up pad (9) position.
5. a kind of landslide physical model test hydraulic lift deadweight charger according to claim arbitrary in claims 1 to 3, is characterized in that: described top hydraulically extensible bar is hydraulic jack.
6. a kind of landslide physical model test hydraulic lift deadweight charger according to claim arbitrary in claims 1 to 3, is characterized in that: described elevating mechanism is double shear fork elevating mechanism; Double shear fork elevating mechanism comprises two groups of scissors forks and lower hydraulic expansion link, often organizes scissors fork and is connected and composed by the bearing pin (13) of two scissor jibs (12) by middle part, be also provided with some bars that reinforces the connection (14) between two scissor jibs (12); The scissors fork upper end of top is connected with angle adjusting mechanism, upper end thereof pitched by the scissors of lower end and below, the scissors fork lower-end rear portion of below is fixed on base (18) by rotating shaft, and the scissors of below fork lower-end front portion is contacted with base (18) by pulley (17), can along base (18) slide anteroposterior; The bar that reinforces the connection (14) that the upper end of described lower hydraulic expansion link and top scissors are pitched is hinged, and the lower end of lower hydraulic expansion link and below scissors are pitched, a bar that reinforces the connection (14) of pulley (17) position is hinged.
7. a kind of landslide physical model test hydraulic lift deadweight charger according to claim 6, is characterized in that: described lower hydraulic expansion link is hydraulic jack.
8. a kind of landslide physical model test hydraulic lift deadweight charger according to claim arbitrary in claims 1 to 3, it is characterized in that: described rotation axis (5) place is provided with angle dial, for the reading of angle between back up pad (9) and slidable panels (6).
9. a kind of landslide physical model test hydraulic lift deadweight charger according to claim arbitrary in claims 1 to 3, is characterized in that: described base (18) below is provided with several rows travelling wheel (19).
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| CN201210414258.7A CN102928572B (en) | 2012-10-26 | 2012-10-26 | Hydraulic-lifting self-weight loading device for landslide physical model test |
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| CN201210414258.7A CN102928572B (en) | 2012-10-26 | 2012-10-26 | Hydraulic-lifting self-weight loading device for landslide physical model test |
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