CN207123480U - Soil arching effect probes into experimental rig under a kind of Passive deformation pattern - Google Patents
Soil arching effect probes into experimental rig under a kind of Passive deformation pattern Download PDFInfo
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- CN207123480U CN207123480U CN201721045727.7U CN201721045727U CN207123480U CN 207123480 U CN207123480 U CN 207123480U CN 201721045727 U CN201721045727 U CN 201721045727U CN 207123480 U CN207123480 U CN 207123480U
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Abstract
Experimental rig, including support are probed into the utility model discloses soil arching effect under a kind of Passive deformation pattern, and bolster model box on support, model box bottom sets the first bottom plate and the second bottom plate；Overlap joint places first baffle on the upside of first bottom plate, and overlap joint places second baffle on the upside of the second bottom plate, and variation rigidity baffle plate is set between first baffle and second baffle；Rotatable pressing plate is fixed in first baffle and second baffle bottom, during press plate rotary to working position, is contacted with variation rigidity baffle plate and supports variation rigidity baffle plate；There is bolt hole on first baffle, second baffle and variation rigidity baffle plate, the situation that is rigidly connected is simulated by the small steel disc with bolt hole, it is superimposed on up and down between first baffle and variation rigidity baffle plate and second baffle and variation rigidity baffle plate, it is attached with bolt, now press plate rotary to inoperative position；First baffle loading jack synchronous with the setting of second baffle bottom, jack bottom sets base；High-speed camera is set on the right side of the model box.
Description
Technical field
The utility model belongs to " soil arching effect " and probes into experiment category, is related to a kind of New device structures and type of attachment,
It is a kind of new soil arching effect model test apparatus, to inquiring into affecting laws of the soil arching effect wall stress characteristic anchor, it is determined that
Anchoring wall load share ratio etc. between section and anchor all there is important theory and practice to be worth.
Background technology
The problem of " soil arching effect " is most critical in underground engineering caused by supporting construction, it is widely present in various ground
In engineering, such as tunnel excavation, pattern foundation pit supporting structure, slope supporting engineering.Soil arching effect refers to inside soil body stress from yield range
It is transferred to the phenomenon for closing on stagnant zone.
At this stage, " soil arching effect " has considerable effect, therefore sheet pile wall, stake for resistance to shear of soil transfer law
The reinforcement techniques such as formula embankment, anchorage pile are held all it to be deployed to study.Pile plate wall dorsal part is due to the appearance of soil arching effect so that stake is carried on the back
There is larger difference in side, soil arching effect generates to the mode of pile plate wall dorsal part soil pressure transmission with baffle plate dorsal part load
Significant impact.The soil arching effect limit capacity of embankment filled soil, Ran Hougen are determined in conventional Piled Embankments design method first
Pulling force that reinforcement material is subjected to and selected reinforcement material are determined according to the load for acting on reinforcement material top surface.Anchorage pile peg board knot
Most of soil pressure after structure is directly delivered to anchor head by soil body inhomogeneous deformation and the space soil arch formed, remainder
Soil pressure is just delivered to anchor head again through pile slab structure.Fully study the mechanism of action of " soil arching effect ", make full use of its stress weight
The characteristics of distribution, becomes main research direction.
Utility model content
The purpose of this utility model is for overcome the deficiencies in the prior art, there is provided a kind of new soil arching effect model test dress
Put, improve it is above-mentioned it is existing probe into " soil arching effect " laboratory test, by using the utility model device carry out laboratory test, to visit
Study carefully " soil arching effect " principle, certain theoretical foundation is provided for engineering practice.
To achieve the above object, the utility model uses following technical proposals：
Soil arching effect probes into experimental rig, including support under a kind of Passive deformation pattern, bolster model box on the support,
The model box upper opening, model box bottom set the first bottom plate and the second bottom plate being fixed on support, first bottom
Plate and the whole model box of the second backplanes support；Overlap joint places first baffle on the upside of first bottom plate, and overlap joint is placed on the upside of the second bottom plate
Second baffle, variation rigidity baffle plate is set between first baffle and second baffle；First baffle and the second baffle bottom is solid
Fixed rotatable pressing plate, during press plate rotary to working position, contacted with variation rigidity baffle plate and support variation rigidity baffle plate, for simulating
Be hinged situation；There is bolt hole on the first baffle, second baffle and variation rigidity baffle plate, the situation that is rigidly connected is by with bolt
The small steel disc in hole is simulated, be superimposed on up and down first baffle and variation rigidity baffle plate and second baffle and variation rigidity baffle plate it
Between, it is attached with bolt, now press plate rotary to inoperative position；The first baffle is synchronous with the setting of second baffle bottom to be added
Jack is carried, jack bottom sets base；The model box side sets high-speed camera.
Further, the model box also include first side plate vertical with the first bottom plate, the second side plate, the 3rd side plate and
4th side plate, first side plate and the second side plate are relative, and the 3rd side plate and the 4th side plate are relative, the first side plate, the second side plate,
3rd side plate and the 4th side plate surround box body.
Further, the 3rd side plate and the 4th side plate are fixedly connected with the first side plate, the 3rd side plate and the 4th side
Plate is fixedly connected with the second side plate.
Further, first side plate and the second side plate bottom are fixed on support by the first connector.To prevent
Model box topples.
Further, under the first bottom plate lower surface and the first side plate, the second side plate, the 3rd side plate and the 4th side plate
Surface flush.
Further, under the second bottom plate lower surface and the first side plate, the second side plate, the 3rd side plate and the 4th side plate
Surface flush.
Further, the cradle top fixes the first bottom plate and the second bottom plate, and first baffle is supported on the first bottom plate,
Second baffle is supported on the second bottom plate.
Further, the spacing between first bottom plate and the second bottom plate is more than between first baffle and second baffle
Spacing；Spacing between the first baffle and second baffle is more than the spacing between variation rigidity baffle plate.
Further, the variation rigidity baffle plate is spliced by least one key dimension baffle plate.
Test method when soil arching effect probes into model equipment to be hinged, comprises the following steps：
Step 1：The baffle plate of first rigidity is positioned between first baffle and second baffle, by press plate rotary to first
Rigidity baffle plate contacts；
Step 2：To set the embedding soil pressure sensor in interval in model box；Interval is set on the downside of the first rigidity baffle plate
Arrange foil gauge；Pressure sensor synchronously is being set between loading jack and first baffle and second baffle；Synchronous loading
Among the base of jack, alignment the first rigidity baffle plate setting arranged for interval laser range finder；Set in the side of model box high
Fast video camera；
Step 3：By suprasil sand by setting compactness placement in layers to model box；
Step 4：Start synchronous loading jack, rise 0.6mm per the stage, in the drive of first baffle and second baffle
Under, the first rigidity baffle plate also moves up, and the redistribution of soil body internal force, monitors soil pressure situation of change and the first rigidity baffle plate
Deformation, and imaged with high-speed camera；
Step 5：The first rigidity baffle plate is changed as the second rigidity baffle plate (or changing the first rigidity baffle dimensions), is repeated
Step 1-step 4, complete experiment.
Soil arching effect probes into test method when model equipment is rigid connection, comprises the following steps：
Step 1：The baffle plate of first rigidity is positioned between first baffle and second baffle, by the small steel with bolt hole
Piece mounted on top makes bolt between first baffle and the first rigidity baffle plate, and between second baffle and the first rigidity baffle plate
Hole is directed at hole, and bolt is penetrated and tightened；
Step 2：To set the embedding soil pressure sensor in interval in model box；Interval is set on the downside of the first rigidity baffle plate
Arrange foil gauge；Pressure sensor synchronously is being set between loading jack and first baffle and second baffle；Synchronous loading
Among the base of jack, alignment the first rigidity baffle plate setting arranged for interval laser range finder；Set in the side of model box high
Fast video camera；
Step 3：By suprasil sand by setting compactness placement in layers to model box；
Step 4：Start synchronous loading jack, rise 0.6mm per the stage, in the drive of first baffle and second baffle
Under, the first rigidity baffle plate also moves up, and the redistribution of soil body internal force, monitors soil pressure situation of change and the first rigidity baffle plate
Deformation, and imaged with high-speed camera；
Step 5：The first rigidity baffle plate is changed as the second rigidity baffle plate (or changing the first rigidity baffle dimensions), is repeated
Step 1-step 4, complete experiment.
Operation principle of the present utility model is：
, will be with first baffle and second baffle after moveable first baffle and second baffle are moved to distance to a declared goal position
The corresponding variation rigidity baffle plate splicing of spacing is completed, and press plate rotary to working position is held variation rigidity baffle plate by parbuckle screw
(or with the small steel disc mounted on top with bolt hole in the junction of first baffle and second baffle and variation rigidity baffle plate, and
It is connected with), earth pressure gauge, foil gauge, pressure sensor, laser range finder and high-speed camera have been laid, then will
Preprepared suprasil sand is filled in model box for 3 layers according to certain compactness point, after the completion for the treatment of that sample fills,
Start synchronous loading jack, promote first baffle and second baffle to move up, and drive variation rigidity baffle plate to move up, soil
Body internal stress is redistributed, and the change of soil pressure is tested by earth pressure gauge, and adding for jack is tested by pressure sensor
Size is pressed, the deformation of variation rigidity baffle plate is measured by foil gauge, displacement is measured by laser range finder, and pass through high-speed camera
Obtain testing picture.
The beneficial effects of the utility model are：
1st, the utility model proposes a kind of simulation " Passive deformation pattern cast anchor a wall mechanical characteristic dodge gate experiment "
New device structures and its application method, the affecting laws of " soil arching effect " wall mechanical characteristic anchor are probed into, overcome existing
There is the deficiency that " soil arching effect " laboratory test is probed into, can be that " soil arching effect " probes into offer new approaches.
2nd, the utility model mould processing is convenient, is readily disassembled and carries, can reuse.
3rd, only by mobile first baffle and second baffle, to realize, " soil encircles wall the utility model between the anchor to different spacing
Effect " is probed into, and saves material, while is also easy to transform model groove.Variation rigidity baffle plate may be configured as being spelled by key dimension baffle plate
Connect and form, splicing, convenient for production without producing the baffle plate of each size as needed, and can reuse, and saves material
Material.Different-stiffness baffle plate can simulate wall between different materials anchor.
4th, induced effect of the utility model by first baffle and second baffle to variation rigidity baffle plate so that in model box
Portion's resistance to shear of soil redistribution, carrys out observing earth arch shape, analyzes soil arching effect whereby.Can change first baffle and second baffle it
Between spacing, change variation rigidity baffle plate size, then can simulate influence of the different openings size to resistance to shear of soil in model box.
5th, the utility model simulates be hinged situation by pressing plate, and rigid connection is simulated by covering the small steel disc of fixation up and down
Situation, a model can simulate two kinds of fixing situations, " soil arching effect " research caused by a wall stress of being casted anchor to Passive Mode
It is more comprehensive.
6th, the first baffle of the utility model model box mutually overlaps with the first bottom plate and second baffle with the second bottom plate,
First baffle and second baffle position can be moved, so that the spacing of the two reaches variation rigidity baffle plate demand.
7th, the first side plate of the present utility model, the second side plate, the 3rd side plate and the 4th side plate bottom are concordant, it is ensured that mould
The globality of flask.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.
Fig. 1 is the axonometric drawing of the utility model structure；
Fig. 2 is 25 centimeters of bottom plate axonometric drawings of the utility model structure spacing；
Fig. 3 is 20 centimeters of bottom plate axonometric drawings of the utility model structure spacing；
Fig. 4 is 15 centimeters of bottom plate axonometric drawings of the utility model structure spacing；
Fig. 5 is 10 centimeters of bottom plate axonometric drawings of the utility model structure spacing；
Fig. 6 is cooperation schematic diagram between two key dimension variation rigidity baffle plates；
Fig. 7 is left plate schematic diagram；
Fig. 8 is front side board schematic diagram；
Fig. 9 is simulation be hinged situation lower shoe, baffle plate and pressing plate cooperation schematic diagram；
Figure 10 is simulation rigid connection situation lower baffle plate and steel disc cooperation schematic diagram；
In figure, 1, support, 2, bottom plate, 3, front side board, 4, left plate, 5, bolt hole, 6, back side panel, 7, angle steel, 8, right side
Plate, 9,25 centimetres of baffle plates, 10, positioning bolt hole, 11,20 centimetres of baffle plates, 12,15 centimetres of baffle plates, 13,10 centimetres of baffle plates, 14, base
Plinth size baffle plate, the 15, first bottom plate, the 16, second bottom plate, 17, pressing plate, 18, connecting hole, 19, first baffle, 20 second baffles,
21st, drill, 22, steel disc, 23, synchronous loading jack, 24, high-speed camera.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
Term explains part:Variation rigidity baffle plate described in the utility model refers to, by changing different baffle plates, realize
Variation rigidity, such as：During experiment, the first rigidity baffle plate, the second rigidity baffle plate, the 3rd rigidity baffle plate changed.
The utility model is further illustrated with reference to the accompanying drawings and examples.
As shown in figures 1 to 6, the mould of a kind of simulation " Passive deformation pattern cast anchor a wall mechanical characteristic dodge gate experiment "
Type, " soil arching effect " is probed into, including by support 1, bottom plate 2, front side board 3 (i.e. the first side plate), left plate 4 the (the i.e. the 3rd
Side plate), bolt hole 5, back side panel 6 (i.e. the second side plate), angle steel 7 (i.e. the first connector), right plate 8 (i.e. the 4th side plate), base
The grade of plinth size baffle plate 14 forms.Bottom plate 2, front side board 3, left plate 4, back side panel 6, right plate 8 can be made of steel plate.
Front side board 3, left plate 4, back side panel 6, right plate 8 are vertical with bottom plate 2, front side board 3, left plate 4, back side panel 6,
Right plate 8 surrounds model box box body.Whole test model is placed on support 1, model box be mainly left plate 4, right plate 8,
Front side board 3, back side panel 6 etc. are spliced by bolt.
As shown in Figure 7 and Figure 8, left plate 4, leave drilling in the side wall of right plate 8, be respectively provided with front side board 3, back side panel 6
Bolt hole 5, left plate 4, right plate 8 may be contained between front side board 3, back side panel 6, will by penetrating bolt in bolt hole 5
Left plate 4, right plate 8 are fixedly connected with front side board 3, back side panel 6.By tightening front side board 3, the bolt on back side panel 6 come real
The connection of existing front side board 3, back side panel 6 and left plate 4, right plate 8.
To prevent whole model from toppling over, front side board 3, back side panel 6 are stuck on support 1 by angle steel 7.
The first bottom plate 15 and the second bottom plate 16 are fixed in the top of support 1.Angle steel 7 is securable to the first bottom plate 15 and the second bottom
On plate 16.
As shown in Fig. 2-Fig. 8, model equipment bottom plate is formed by combining by bottom plate 2, key dimension baffle plate 14, model box top
Opening, the bottom plate 2 of model box bottom is made up of the first bottom plate 15 and the second bottom plate 16, between the first bottom plate 15 and the second bottom plate 16
First baffle 19 and second baffle 20 are set, set variable-sized variation rigidity to keep off between first baffle 19 and second baffle 20
Plate, such as 25 centimetres of baffle plates 9 or 20 centimetres of baffle plates 11 or 15 centimetres of baffle plates 12 or 10 centimetres of baffle plates 13.The upper surface of first bottom plate 15
With left plate 4, front side board 3, back side panel 6 lower surface flush, the upper surface of the second bottom plate 16 and right plate 8, front side board 3, after
The lower surface flush of side plate 6.
Back side panel 6 is identical with the structure of front side board 3, and left plate 4 is identical with the structure of right plate 8.In Fig. 8, front side board 3
Two bottom sides are respectively provided with connecting hole 18, likewise, the two bottom sides of back side panel 6 are respectively provided with connecting hole 18.
As shown in figure 9, rotatable pressing plate 17 is fixed in first baffle 19 and the bottom of second baffle 20, pressing plate 17 turns to
During working position, contacted with variation rigidity baffle plate and support baffle plate；When pressing plate 17 turns to inoperative position, taken off with variation rigidity baffle plate
From.4 pressing plates 17 are fixed on first baffle 19 and second baffle 20 by stove bolt, and pressing plate is realized by elasticity bolt
17 rotation, for simulating be hinged state.When pressing plate 17 turns to it is parallel with front side board 3 when, various sizes of change can be supported
Rigidity baffle plate, loaded by synchronous loading jack pair first baffle and second baffle so that first baffle and second baffle production
Raw upward displacement, by the connection of hinged platen, variation rigidity baffle plate also produces under the drive of first baffle and second baffle
Shift up, now internal resistance to shear of soil redistribution, carrys out observing earth arch shape whereby, analyzes the soil arch effect under be hinged state
Should.
As shown in Figure 10, passed through with bolt on first baffle 19, second baffle 20, variation rigidity baffle plate and small steel disc 22
Bolt hole 5, to fix first baffle 19 and variation rigidity baffle plate and second baffle 20 and variation rigidity baffle plate, for simulating rigid connection feelings
Condition.Loaded by synchronous loading jack pair first baffle and second baffle so that first baffle and second baffle produce upwards
Displacement, by the connection of the small steel disc of rigid connection, variation rigidity baffle plate also produces upward under the drive of first baffle and second baffle
Displacement, now internal resistance to shear of soil redistribution, carrys out observing earth arch shape, analyzes the soil arching effect under rigid connection state whereby.
The minimum spacing of first baffle 19 and second baffle 20 is 10 centimeters, now by 10 centimetres of variation rigidity baffle plates 13 pressure
Plate 17 is fixed between first baffle 19 and second baffle 20, is completed the be hinged pilot model apparatus that spacing is 10 centimetres and is spliced；
First baffle 19 and second baffle 20 are moved 2.5 centimetres laterally respectively, now first baffle 19 and the spacing of second baffle 20
For 15 centimeters, then 15 centimetres of variation rigidity baffle plates 12 are stuck between first baffle 19 and second baffle 20 by pressing plate 17 can be complete
Splice into the be hinged pilot model apparatus that spacing is 15 centimetres.The like complete that spacing is 20 centimetres and spacing is 25 centimetres
Be hinged experimental rig splicing.
The minimum spacing of first baffle 19 and second baffle 20 is 10 centimeters, by 10 centimetres of variation rigidity baffle plates 13 with small steel
Piece 22 and it is bolted between first baffle 19 and second baffle 20, completes the rigid connection test model that spacing is 10 centimetres and fill
Put splicing；First baffle 19 and second baffle 20 are moved 2.5 centimetres laterally respectively, now first baffle 19 and second gear
The spacing of plate 20 is 15 centimeters, then by small steel disc 22 and 15 centimetres of variation rigidity baffle plates 12 are bolted into first baffle 19 and the
The rigid connection pilot model apparatus that spacing is 15 centimetres can be completed between two baffle plates 20 to splice.The like complete spacing be 20 lis
Rice and the rigid connection experimental rig that spacing is 25 centimetres splice.
As shown in figures 3 to 6, various sizes of variation rigidity baffle plate is spliced by least one key dimension variation rigidity baffle plate 14
Form, to ensure its globality, key dimension variation rigidity baffle sidewall leaves drilling 21, and two pieces of bases are realized by a bolt
The docking of plinth size variation rigidity baffle plate 14.The key dimension variation rigidity baffle plate 14 of two kinds of sizes is set in the present embodiment, it is left in Fig. 6
Side is 5cm key dimension variation rigidities baffle plate 14, and right side is 10cm key dimension variation rigidities baffle plate 14, thereon in the right and left
Between position be respectively provided with bolt hole 5, to realize rigid connection situation.To ensure its globality, in screw connection built in the use of stitching portion.
15 centimetres of variation rigidity baffle plates 12 are by 10 centimetres of key dimension variation rigidity baffle plates 14 and 5 centimetres of key dimension variation rigidity gears
The docking of plate 14 is completed；20 centimetres of retainer plates 11 dock completion by 2 10 centimetres of key dimension variation rigidity baffle plates 14；25 centimetres of retainers
Plate 9 docks completion by 2 10 centimetres of key dimension variation rigidity baffle plates, 14 and 15 centimetres of key dimension variation rigidity baffle plate 14.Become
Rigidity baffle plate realizes 10 centimetres, 15 centimetres, 20 lis by 1 piece 5 centimetres, 2 pieces of 10 centimetres of key dimension variation rigidity baffle plates 14 splicings
Rice, 4 variation rigidity baffle plates installations such as 25 centimetres, save material.
" soil arching effect " probes into be hinged test method, comprises the following steps that：
1) bolt that pressing plate 17 and first baffle 19, second baffle 20 connect is unclamped, pressing plate 17 is rotated to and front side board 3
It is parallel, bolt is tightened, then 10 centimetres of the first rigidity baffle plate 13 is positioned over first baffle 19 and the gap location of second baffle 20；
2) on 20,10 centimetre of first first baffle 19, second baffle rigidity baffle plate 13 to set the embedding soil pressure in interval
Sensor；In 10 centimetre of first downside of rigidity baffle plate 13 setting arranged for interval foil gauge；Synchronously loading jack 23 and first
Pressure sensor is set between baffle plate 19 and second baffle 20；Among the base of synchronous loading jack 23,10 centimetres are directed at
First rigidity baffle plate 13 sets arranged for interval laser range finder；In the side of model box, high-speed camera 24 is set；
3) by suprasil sand by setting compactness placement in layers to model box；
4) start synchronous loading jack 23, rise 0.6mm per the stage, in the drive of first baffle 19 and second baffle 20
Under, 10 centimetre of first rigidity baffle plate 13 also moves up in the case of be hinged, the redistribution of soil body internal force, observes on computer and straining
Value changes；Whether the soil body between observation gap has arching, completes experiment process during 10cm gaps, and use high-speed camera
Machine 24 is imaged；
5) soil body is taken out out of model casing, first baffle 19, second baffle 20 is displaced outwardly 2.5 centimetres, by 10 lis
Rice key dimension variation rigidity baffle plate 14 and 5 centimetres of key dimension variation rigidity baffle plates 14 form 15 centimetre of first rigidity after splicing and kept off
Plate 12, (or change 10 centimetres of the second rigidity of key dimension baffle plates 14) is again by 15 centimetre of first rigidity baffle plate 12 (or 10 centimetres of bases
The second rigidity of plinth size baffle plate 14) it is placed between first baffle 19, second baffle 20, the step such as repeat step 1,3,4, complete
The be hinged experiment process of (or second rigidity baffle plate) during 15cm gaps.
6) it is identical with step 5, it is sequentially completed 20 cm clearances (or the 3rd rigidity baffle plate), (or the 4th is firm for 25 cm clearances
Spend baffle plate) be hinged experiment；Influence of the different openings size to resistance to shear of soil can be simulated.
7) arrangement and processing data.
" soil arching effect " probes into rigid connection test method, comprises the following steps that：
1) bolt that pressing plate 17 and first baffle 19, second baffle 20 connect is unclamped, pressing plate 17 is rotated to and front side board 3
Vertically, bolt is tightened, 10 centimetres of the first rigidity baffle plate 13 is then positioned over first baffle 19 and the gap location of second baffle 20,
Small steel disc 22 is overlayed into 10 centimetre of first rigidity baffle plate 13 again and on first baffle 19, second baffle 20, blending bolt connects；
2) on 20,10 centimetre of first first baffle 19, second baffle rigidity baffle plate 13 to set the embedding soil pressure in interval
Sensor；In 10 centimetre of first downside of rigidity baffle plate 13 setting arranged for interval foil gauge；Synchronously loading jack 23 and first
Pressure sensor is set between baffle plate 19 and second baffle 20；Among the base of synchronous loading jack 23,10 centimetres are directed at
First rigidity baffle plate 13 sets arranged for interval laser range finder；In the side of model box, high-speed camera 24 is set；
3) by suprasil sand by setting compactness placement in layers to model box；
4) start synchronous loading jack 23, rise 0.6mm per the stage, in the drive of first baffle 19 and second baffle 20
Under, 10 centimetre of first rigidity baffle plate 13 also moves up in the case of rigid connection, the redistribution of soil body internal force, observes on computer and straining
Value changes；Whether the soil body between observation gap has arching, completes experiment process during 10cm gaps, and use high-speed camera
Machine 24 is imaged；
5) soil body is taken out out of model casing, first baffle 19, second baffle 20 is displaced outwardly 2.5 centimetres, by 10 lis
Rice key dimension variation rigidity baffle plate 14 and 5 centimetres of key dimension variation rigidity baffle plates 14 form 15 centimetre of first rigidity after splicing and kept off
Plate 12, (or change 10 centimetres of the second rigidity of key dimension baffle plates 14) is again by 15 centimetre of first rigidity baffle plate 12 (or 10 centimetres of bases
The second rigidity of plinth size baffle plate 14) it is placed between first baffle 19, second baffle 20, the step such as repeat step 1,3,4, complete
The rigid connection experiment process of (or second rigidity baffle plate) during 15cm gaps.
6) it is identical with step 5, it is sequentially completed 20 cm clearances (or the 3rd rigidity baffle plate), (or the 4th is firm for 25 cm clearances
Spend baffle plate) rigid connection experiment；Influence of the different openings size to resistance to shear of soil can be simulated.
7) arrangement and processing data.
Embodiment：
First baffle and second baffle spacing are adjusted to 20 centimetres, then by 2 10 centimetres the first rigidity baffle plate screws
Splicing is completed, and is stuck in pressing plate between first baffle and second baffle；Divide 3 layers and fill suprasil sand；Fill and complete it
Afterwards, synchronous loading jack is started so that first baffle, second baffle and variation rigidity baffle plate slowly rise, synchronous loading thousand
Jin top often rises 0.6mm, reads earth pressure gauge, foil gauge, pressure sensor, the data on laser range finder.
It is not new to this practicality although above-mentioned specific embodiment of the present utility model is described with reference to accompanying drawing
The limitation of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Field technique personnel need not pay the various modifications that creative work can make or deformation still in protection model of the present utility model
Within enclosing.
Claims (8)
1. soil arching effect probes into experimental rig under a kind of Passive deformation pattern, it is characterised in that including support, is propped up on the support
Hold mode flask, the model box upper opening, model box bottom set the first bottom plate and the second bottom plate being fixed on support, institute
State the first bottom plate and the whole model box of the second backplanes support；Overlap joint places first baffle, the second bottom plate upside on the upside of first bottom plate
Overlap joint places second baffle, and variation rigidity baffle plate is set between first baffle and second baffle；The first baffle and second baffle
Rotatable pressing plate is fixed in bottom, during press plate rotary to working position, is contacted with variation rigidity baffle plate and supports variation rigidity baffle plate,
For simulating be hinged situation；Have bolt hole on the first baffle, second baffle and variation rigidity baffle plate, the situation that is rigidly connected by
Small steel disc with bolt hole is simulated, and is superimposed on first baffle and variation rigidity baffle plate and second baffle and variation rigidity up and down
Between baffle plate, it is attached with bolt, now press plate rotary to inoperative position；
Placement in layers suprasil sand in the model box；
Arranged for interval foil gauge is set on the downside of the first rigidity baffle plate；
First baffle loading jack synchronous with the setting of second baffle bottom, jack bottom sets base；
Among the base of synchronous loading jack, alignment the first rigidity baffle plate setting arranged for interval laser range finder；
Pressure sensor synchronously is being set between loading jack and first baffle and second baffle；
The model box side sets high-speed camera.
2. soil arching effect probes into experimental rig under a kind of Passive deformation pattern as claimed in claim 1, it is characterised in that described
Model box also includes first side plate vertical with the first bottom plate, the second side plate, the 3rd side plate and the 4th side plate, first side plate
Relative with the second side plate, the 3rd side plate and the 4th side plate are relative, and the first side plate, the second side plate, the 3rd side plate and the 4th side plate enclose
Into box body.
3. soil arching effect probes into experimental rig under a kind of Passive deformation pattern as claimed in claim 2, it is characterised in that described
3rd side plate and the 4th side plate are fixedly connected with the first side plate, and the 3rd side plate and the 4th side plate are fixed with the second side plate and connected
Connect.
4. soil arching effect probes into experimental rig under a kind of Passive deformation pattern as claimed in claim 2, it is characterised in that described
First side plate and the second side plate bottom are fixed on support by the first connector.
5. soil arching effect probes into experimental rig under a kind of Passive deformation pattern as claimed in claim 2, it is characterised in that described
First bottom plate lower surface and the lower surface flush of the first side plate, the second side plate, the 3rd side plate and the 4th side plate.
6. soil arching effect probes into experimental rig under a kind of Passive deformation pattern as claimed in claim 2, it is characterised in that described
Second bottom plate lower surface and the lower surface flush of the first side plate, the second side plate, the 3rd side plate and the 4th side plate.
7. soil arching effect probes into experimental rig under a kind of Passive deformation pattern as claimed in claim 1, it is characterised in that described
Spacing between first bottom plate and the second bottom plate is more than the spacing between first baffle and second baffle；The first baffle and
Spacing between two baffle plates is more than the spacing between variation rigidity baffle plate.
8. soil arching effect probes into experimental rig under a kind of Passive deformation pattern as claimed in claim 1, it is characterised in that described
Variation rigidity baffle plate is spliced by least one key dimension baffle plate.
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| CN108396791A (en) * | 2018-04-20 | 2018-08-14 | 山东大学 | A kind of multifunctional large-scale roadbed experimental system and experimental method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108396791A (en) * | 2018-04-20 | 2018-08-14 | 山东大学 | A kind of multifunctional large-scale roadbed experimental system and experimental method |
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