CN206671332U - A kind of soil arching effect model test apparatus - Google Patents
A kind of soil arching effect model test apparatus Download PDFInfo
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- CN206671332U CN206671332U CN201720494654.3U CN201720494654U CN206671332U CN 206671332 U CN206671332 U CN 206671332U CN 201720494654 U CN201720494654 U CN 201720494654U CN 206671332 U CN206671332 U CN 206671332U
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Abstract
The utility model discloses a kind of soil arching effect model test apparatus, including support, bolster model box on the support, the model box upper opening, model box bottom sets moveable first bottom plate and the second bottom plate, first bottom plate and the second backplanes support set retainer plate on support between the first bottom plate and the second bottom plate；First bottom plate and the second bottom base plate fix rotatable pressing plate, during press plate rotary to working position, are contacted with retainer plate and support retainer plate；During press plate rotary to inoperative position, depart from retainer plate, retainer plate drops.Press plate rotary to inoperative position, retainer plate is dropped, resistance to shear of soil redistribution inside model box, carrys out observing earth arch shape whereby, analyzes soil arching effect.The spacing between the first bottom plate and the second bottom plate can be changed, change the size of retainer plate, then can simulate influence of the different openings size to resistance to shear of soil in 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,
Specifically, it is a kind of soil arching effect model test apparatus, the level of understanding to improving the slope reinforcement mechanism of action, analysis stake soil
Between stress transferring rule, determine that pile-soil interaction mode etc. 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 underground engineering
In, such as tunnel excavation, pattern foundation pit supporting structure engineering.Its essence is a kind of phenomenon of stress transfer.The transfer of this stress is due to
By external force inhomogeneous deformation is occurred for the soil body, is realized by the performance of shear strength.
At this stage, " soil arching effect " has considerable effect, therefore pile formula road for resistance to shear of soil transfer law
The reinforcement techniques such as dike, sheet pile wall, friction pile, anchorage pile all deploy to study to it.In conventional Piled Embankments design method first
The soil arching effect limit capacity of embankment filled soil is determined, reinforcement material need are then determined according to the load for acting on reinforcement material top surface
The pulling force and selected reinforcement material born.Pile plate wall dorsal part is due to the appearance of soil arching effect so that stake dorsal part and baffle plate dorsal part institute
Larger difference be present by load, soil arching effect generates significant impact to the mode of pile plate wall dorsal part soil pressure transmission.Soil
The presence of arch changes original stress state in the friction pile soil body, causes stresses re-distribution, the pressure acted on soil arch
Power is delivered in steady soil around.Most of soil pressure after anchorage pile pile slab structure is formed by soil body inhomogeneous deformation
Space soil arch be directly delivered to anchor head, the soil pressure of remainder is just delivered to anchor head again through pile slab structure.Fully research " soil
The mechanism of action of arching ", the characteristics of its stresses re-distribution is made full use of to become main research direction.
Utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of new soil arching effect model examination
Experiment device and test method, improve it is above-mentioned it is existing probe into " soil arching effect " laboratory test, enter by using the utility model device
Row laboratory test, to probe into " 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 model test apparatus, including support, bolster model box on the support, the model box top is opened
Mouthful, model box bottom sets moveable first bottom plate and the second bottom plate, and first bottom plate and the second backplanes support are in support
On, retainer plate is set between the first bottom plate and the second bottom plate；First bottom plate and the second bottom base plate are fixed rotatable
Pressing plate, during press plate rotary to working position, contacted with retainer plate and support retainer plate；During press plate rotary to inoperative position, with support
Flitch departs from, and retainer plate drops.
The 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 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, the 3rd side plate
Box body is surrounded with the 4th side plate.
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 with second
Side plate is fixedly connected.
First side plate and the second side plate bottom are fixed on support by the first connector.Incline to prevent model box
Cover.
First side plate with the first bottom plate cooperation at multiple first connecting holes are set, the is set on first bottom plate
Two connecting holes, the first connecting hole and the second connecting hole are connected by the second connector.
Preferably, second connecting hole is slotted hole.
First side plate with the second bottom plate cooperation at multiple 3rd connecting holes are set, the is set on second bottom plate
Four connecting holes, the 3rd connecting hole and the 4th connecting hole are connected by the 3rd connector.
Preferably, the 4th connecting hole is slotted hole.
Second side plate with the first bottom plate cooperation at multiple 5th connecting holes are set, the is set on first bottom plate
Six connecting holes, the 5th connecting hole and the 6th connecting hole are connected by the 4th connector.
Preferably, the 6th connecting hole is slotted hole.
Second side plate with the second bottom plate cooperation at multiple 7th connecting holes are set, the is set on second bottom plate
Eight connecting holes, the 7th connecting hole and the 8th connecting hole are connected by the 5th connector.
Preferably, the 8th connecting hole is slotted hole.
First plate upper surface and the 3rd side plate lower surface flush, the first bottom plate lower surface and the first side plate and the
The equal flush in lower surface of two side plates.
Second plate upper surface and the 4th side plate lower surface flush, the second bottom plate lower surface and the first side plate and the
The equal flush in lower surface of two side plates.
Preferably, the cradle top fixes the first top plate and the second top plate, and the first backplanes support is on the first top plate, and
Two backplanes supports are on the second top plate.
Spacing between first top plate and the second top plate is more than the spacing between the first bottom plate and the second bottom plate.
The retainer plate is spliced by least one key dimension retainer plate.
The test method of soil arching effect model test apparatus, comprises the following steps：
Step 1：According to the setting moisture content mix soil body, setting time is stood after mix；
Step 2：First bottom plate and the second bottom plate are pulled open into setpoint distance, the retainer plate being sized is positioned over the first bottom
Between plate and the second bottom plate, press plate rotary is extremely contacted with retainer plate；
Step 3：To set the embedding soil pressure sensor in interval in model box, by the soil body after mix by setting compactness
Point multilayer is filled to model box；
Step 4：Press plate rotary is departed to retainer plate, retainer plate drops, and the redistribution of soil body internal force, monitors soil pressure
Situation of change；
Step 5：The size of retainer plate is changed, repeats step 1- steps 4, completes experiment.
Operation principle of the present utility model is：
, will be with the first bottom plate and the second bottom plate after moveable first bottom plate and the second bottom plate are moved to distance to a declared goal position
The corresponding retainer plate splicing of spacing is completed, and by parbuckle screw, press plate rotary to working position is held retainer plate, then by thing
The soil sample first configured is filled in model box for 3 layers according to certain compactness point, after the completion for the treatment of that sample fills, unclamps bottom pressure
Bolt on plate, after pressing plate is rotated by 90 °, retainer plate drops, and resistance to shear of soil redistribution, soil is tested by soil pressure cell
The change of pressure.
The beneficial effects of the utility model are：
1st, the utility model proposes one kind to probe into " soil arching effect " New device structures and its application method, available for pair
Various soil mass " soil arching effect " is probed into, and overcomes the deficiency that existing " soil arching effect " laboratory test is probed into, and can be " soil arching effect "
Offer new approaches are provided.
2nd, the utility model mould processing is convenient, is readily disassembled and carries, can reuse.
3rd, the utility model only realizes the soil body " soil to different spacing by the mobile bottom plate of bottom first and the second bottom plate
Arching " is probed into, and saves material, while is also easy to transform model groove.Retainer plate may be configured as being spelled by key dimension retainer plate
Connect and form, splicing, convenient for production without producing the retainer plate of each size as needed, and can reuse, and saves material
Material.
4th, the utility model drops press plate rotary to inoperative position, retainer plate, and resistance to shear of soil is from new point inside model box
Cloth, carry out observing earth arch shape whereby, analyze soil arching effect.The spacing between the first bottom plate and the second bottom plate can be changed, change support
The size of flitch, then it can simulate influence of the different openings size to resistance to shear of soil in model box.
5th, the first bottom plate of the utility model model box and the second bottom plate and the link position of the first side plate and the second side plate
It can be adjusted, can be with so that the spacing of the first bottom plate and the second bottom plate reaches demand, and sets slotted hole to be attached
It is finely adjusted.
6th, the first bottom plate of the present utility model and the second bottom plate top are concordant with the 3rd side plate and the 4th side plate bottom, and first
Bottom plate and the second bottom plate bottom are concordant with the first side plate and the second side plate bottom, it is ensured that the globality of model box, model box
The interior soil body will not be dropped out by the gap of bottom plate and side plate.
Brief description of the drawings
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 retainer plates；
Fig. 7 is left plate schematic diagram；
Fig. 8 is front side board schematic diagram；
Fig. 9 is bottom plate and pressing plate 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 retainer plates, 10, positioning bolt hole, 11,20 centimetres of retainer plates, 12,15 centimetres of retainer plates, 13,10 centimetres of retainers
Plate, 14, key dimension retainer plate, the 15, first bottom plate, the 16, second bottom plate, 17, pressing plate, 18, connecting hole, the 19, first top plate, 20
Second top plate, 21, drilling.
Embodiment
The utility model is further illustrated with reference to the accompanying drawings and examples.
As shown in figures 1 to 6, a kind of " soil arching effect " probes into model equipment, including by support 1, bottom plate 2, front side board 3
(i.e. the first side plate), left plate 4 (i.e. the 3rd side plate), bolt hole 5, back side panel 6 (i.e. the second side plate), (the i.e. first connection of angle steel 7
Part), right plate 8 (i.e. the 4th side plate), the grade of key dimension retainer plate 14 composition.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 top plate 19 and the second top plate 20 are fixed in the top of support 1, and the first bottom plate 15 is supported on the first top plate 19, and second
Bottom plate 16 is supported on the second top plate 20.Angle steel 7 is securable on the first top plate 19 and the second top plate 20.
Spacing between first top plate 19 and the second top plate 20 is more than the spacing between the first bottom plate 15 and the second bottom plate 16.
As shown in Fig. 2-Fig. 8, model equipment bottom plate is by bottom plate 2, and key dimension retainer plate 14 is formed by combining, on model box
Portion's opening, the bottom plate 2 of model box bottom are made up of the moveable bottom plate 16 of first bottom plate 15 and second, the first bottom plate 15 and second
Variable-sized retainer plate is set between bottom plate 16, such as 25 centimetres of retainer plates 9 or 20 centimetres of retainer plates 11 or 15 centimetres of retainer plates
12 or 10 centimetres of retainer plates 13.The upper surface of first bottom plate 15 and the lower surface flush of left plate 4, the lower surface of the first bottom plate 15 is with before
Side plate 3, the equal flush in the lower surface of back side panel 6.The upper surface of second bottom plate 16 and the lower surface flush of right plate 8, the second bottom plate
16 lower surfaces and front side board 3, the equal flush in the lower surface of back side panel 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, the bottom of front side board 3
Portion both 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, the first bottom plate 15 and the second bottom
Plate 16 is respectively provided with positioning bolt hole 10 (i.e. connecting hole), and positioning bolt hole 10 is slotted hole, and the first bottom plate 15, the second bottom plate 16 are equal
It is connected with front side board 3, back side panel 6 by positioning bolt hole 10, connecting hole 18, passes through different connecting holes 18 and positioning bolt hole 10
Connection, or the connection of the diverse location of positioning bolt hole 10 and connecting hole 18, thus it is possible to vary the first bottom plate 15 and the second bottom
The position of plate 16.
As shown in figure 9, rotatable pressing plate 17 is fixed in the first bottom plate 15 and the bottom of the second bottom plate 16, pressing plate 17 turns to
During working position, contacted with retainer plate and support retainer plate；When pressing plate 17 turns to inoperative position, depart from retainer plate, retainer
Plate drops.4 pressing plates 17 are fixed on 2 bottom plates 2 by stove bolt, and the rotation of pressing plate 17 is realized by elasticity bolt, when
Pressing plate 17 rotate it is parallel with front side board 3 when, various sizes of retainer plate can be supported, when pressing plate 17 turns to and front side board 3
When vertical, retainer plate is fallen down, and internal resistance to shear of soil carrys out observing earth arch shape, analyze soil arching effect whereby from new distribution.
The minimum spacing of first bottom plate 15 and the second bottom plate 16 is 10 centimeters, now by 10 centimetres of pressing plates 17 of retainer plate 13
It is fixed between the first bottom plate 15 and the second bottom plate 16, completes the pilot model apparatus that spacing is 10 centimetres and splice；Spiral shell will be positioned
Bolt is unclamped on keyhole 10, and the first bottom plate 15 and the second bottom plate 16 are moved into 2.5 centimetres laterally respectively, tighten bolt, now
First bottom plate 15 and the spacing of the second bottom plate 16 are 15 centimeters, then 15 centimetres of retainer plates 12 are stuck in into the first bottom plate 15 by pressing plate 17
And second can complete the pilot model apparatus that spacing is 15 centimetres between bottom plate 16 and splice.The like complete spacing be 20 lis
Rice and spacing are that 25 centimetres of experimental rigs splice.
As shown in figures 3 to 6, various sizes of retainer plate is spliced by least one key dimension retainer plate 14, to protect
Its globality is demonstrate,proved, retainer plate side wall leaves drilling 21, and the docking of two pieces of key dimension retainer plates 14 is realized by a bolt.
The key dimension retainer plate 14 of two kinds of sizes is set in the present embodiment, and left side is 5cm key dimensions retainer plate 14 in Fig. 6, right side
For 10cm key dimensions retainer plate 14.To ensure its globality, in screw connection built in the use of stitching portion.
15 centimetres of retainer plates 12 have been docked by 10 centimetres of key dimension retainer plates 14 and 5 centimetres of key dimension retainer plates 14
Into；20 centimetres of retainer plates 11 dock completion by 2 10 centimetres of key dimension retainer plates 14；25 centimetres of retainer plates 9 are by 2 10 centimetres
Key dimension retainer plate 14 and 15 centimetres of key dimension retainer plates 14 docking are completed.Retainer plate passes through 1 piece 5 centimetres, 2 pieces 10 lis
10 centimetres, 15 centimetres, 20 centimetres, 4 retainer plates installations such as 25 centimetres are realized in the splicing of rice key dimension retainer plate 14, save material
Material.
" soil arching effect " probes into test method, comprises the following steps that：
1) soil body is mixed and stirred according to certain moisture content, after the completion of mixing and stirring, be placed in bucket static 1 day；
2) bottom plate 15 of pressing plate 17 and first, the bolt of the second bottom plate 16 connection are unclamped, pressing plate 17 is rotated to and front side board 3
It is parallel, bolt is tightened, 10 centimetres of retainer plates 13 are being placed on the first bottom plate 15, the gap location of the second bottom plate 16；
3) embedding soil pressure cell at certain intervals on a base plate 2；
4) divide 3 layers by the soil body mixed to insert in model box, plucking disposal is carried out on every layer of contact surface, to ensure soil
Body uniform force；
5) bolt of pressing plate 17 is unclamped, be rotated by 90 °, now retainer plate is fallen down, and the redistribution of soil body internal force, observes computer
Upper strain value changes；Whether the soil body between observation gap has arching, completes experiment process during 10cm gaps.
6) soil body is taken out out of model casing, unclamps front side board 3, the bottom plate 15 of back side panel 6 and first, the spiral shell of the second bottom plate 16
Bolt, the first bottom plate 15, the second bottom plate 16 are displaced outwardly 2.5 centimetres, by 10 centimetres of key dimension retainer plates 14 and 5 centimetres of bases
Size retainer plate 14 forms 15 centimetres of retainer plates 12 after splicing, then 15 centimetres of retainer plates 12 are placed on into the first bottom plate 15, the second bottom
Between plate 16, the step such as repeat step 1,3,4,5；Complete experiment process during 15cm gaps.
7) it is identical with step 6, it is sequentially completed 20 cm clearances, the experiment of 25 cm clearances；Different openings size can be simulated
Influence to resistance to shear of soil.
8) arrangement and processing data.
Embodiment：
After clay is crossed into 5mm sieve apertures, uniform mixing is placed in sealing bucket, after standing 1 day, will be configured to most preferably contain in bucket
The soil body of water rate 18.1%, 1 day is stood being placed into sealing bucket；First bottom plate and the second bottom plate spacing are adjusted to 20 centimetres,
2 10 centimetres of retainer plates are spliced with screw again and completed, are stuck in pressing plate between the first bottom plate and the second bottom plate；According to
80% point 3 layers are filled, and " plucking " disposal is carried out between each contact surface；After filling completion, the bolt on pressing plate is unclamped, holds support
Flitch makes it slowly drop, and after soil pressure cell registration is stable, reads the numerical value on soil pressure cell.
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 (10)
1. soil arching effect model test apparatus, it is characterized in that, including support, bolster model box on the support, the model box
Upper opening, model box bottom set moveable first bottom plate and the second bottom plate, first bottom plate and the second backplanes support
In on support, retainer plate is set between the first bottom plate and the second bottom plate；First bottom plate and the fixation of the second bottom base plate can
The pressing plate of rotation, during press plate rotary to working position, contacted with retainer plate and support retainer plate；Press plate rotary is to inoperative position
When, depart from retainer plate, retainer plate drops.
2. experimental rig as claimed in claim 1, it is characterized in that, the model box also includes vertical with the first bottom plate first
Side plate, the second side plate, the 3rd side plate and the 4th side plate, first side plate and the second side plate are relative, the 3rd side plate and the 4th side
Plate is relative, and the first side plate, the second side plate, the 3rd side plate and the 4th side plate surround box body.
3. experimental rig as claimed in claim 2, it is characterized in that, the 3rd side plate and the 4th side plate are consolidated with the first side plate
Fixed connection, the 3rd side plate and the 4th side plate are fixedly connected with the second side plate；First side plate and the second side plate bottom are logical
The first connector is crossed to be fixed on support.
4. experimental rig as claimed in claim 2, it is characterized in that, first side plate with the first bottom plate cooperation at set it is more
Individual first connecting hole, the second connecting hole, the first connecting hole and the second connecting hole is set on first bottom plate to pass through the second connection
Part connects；Second connecting hole is slotted hole.
5. experimental rig as claimed in claim 2, it is characterized in that, first side plate with the second bottom plate cooperation at set it is more
Individual 3rd connecting hole, the 4th connecting hole is set on second bottom plate, and the 3rd connecting hole and the 4th connecting hole pass through the 3rd connection
Part connects；4th connecting hole is slotted hole.
6. experimental rig as claimed in claim 2, it is characterized in that, second side plate with the first bottom plate cooperation at set it is more
Individual 5th connecting hole, the 6th connecting hole is set on first bottom plate, and the 5th connecting hole and the 6th connecting hole pass through the 4th connection
Part connects；6th connecting hole is slotted hole.
7. experimental rig as claimed in claim 2, it is characterized in that, second side plate with the second bottom plate cooperation at set it is more
Individual 7th connecting hole, the 8th connecting hole is set on second bottom plate, and the 7th connecting hole and the 8th connecting hole pass through the 5th connection
Part connects；8th connecting hole is slotted hole.
8. experimental rig as claimed in claim 2, it is characterized in that, first plate upper surface and the 3rd side plate lower surface phase
Concordantly, the first bottom plate lower surface and the equal flush in lower surface of the first side plate and the second side plate；
Second plate upper surface and the 4th side plate lower surface flush, the second bottom plate lower surface and the first side plate and the second side
The equal flush in lower surface of plate.
9. experimental rig as claimed in claim 1, it is characterized in that, the cradle top fixes the first top plate and the second top plate,
First backplanes support is on the first top plate, and the second backplanes support is on the second top plate；Between first top plate and the second top plate
Spacing be more than spacing between the first bottom plate and the second bottom plate.
10. experimental rig as claimed in claim 1, it is characterized in that, the retainer plate is by least one key dimension retainer plate
It is spliced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720494654.3U CN206671332U (en) | 2017-05-05 | 2017-05-05 | A kind of soil arching effect model test apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720494654.3U CN206671332U (en) | 2017-05-05 | 2017-05-05 | A kind of soil arching effect model test apparatus |
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| Publication Number | Publication Date |
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| CN206671332U true CN206671332U (en) | 2017-11-24 |
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ID=60370614
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720494654.3U Expired - Fee Related CN206671332U (en) | 2017-05-05 | 2017-05-05 | A kind of soil arching effect model test apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020114149A1 (en) * | 2018-12-03 | 2020-06-11 | 中国科学院地质与地球物理研究所 | Sample making die for rock body structural surface shear test |
-
2017
- 2017-05-05 CN CN201720494654.3U patent/CN206671332U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020114149A1 (en) * | 2018-12-03 | 2020-06-11 | 中国科学院地质与地球物理研究所 | Sample making die for rock body structural surface shear test |
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Granted publication date: 20171124 Termination date: 20190505 |