CN110031337A - Roadbed filling and Earthworking reinforced bar interface mechanics characteristic detecting apparatus and measuring method - Google Patents
Roadbed filling and Earthworking reinforced bar interface mechanics characteristic detecting apparatus and measuring method Download PDFInfo
- Publication number
- CN110031337A CN110031337A CN201910350797.0A CN201910350797A CN110031337A CN 110031337 A CN110031337 A CN 110031337A CN 201910350797 A CN201910350797 A CN 201910350797A CN 110031337 A CN110031337 A CN 110031337A
- Authority
- CN
- China
- Prior art keywords
- packing cavity
- reinforced bar
- cover board
- earthworking reinforced
- interior packing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
- G01N2203/0051—Piezoelectric means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0611—Hydraulic or pneumatic indicating, recording or sensing means
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Road Repair (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of roadbed fillings and Earthworking reinforced bar interface mechanics characteristic detecting apparatus and measuring method, the device includes horizontally disposed bottom plate, bottom plate is equipped with shearing rotating disk, shearing rotating disk includes the interior packing cavity of cartridge type, the outside of interior packing cavity is equipped with the outer packing cavity of circular ring shape, the bottom centre of interior packing cavity is connected by the output end of shaft and device for revolving and driving, the relative rotation face of interior packing cavity and outer packing cavity is equipped with the Earthworking reinforced bar of circular ring shape, connection is freely rolled between interior packing cavity and bottom plate, the center of interior packing cavity is equipped with cylindrical the blowing pressure device, interior packing cavity, pressing device is equipped with above the cover board of outer packing cavity, interior packing cavity, the cover board of outer filler freely rolls connection between corresponding pressing device respectively.Roadbed filling and the contact area at Earthworking reinforced bar interface are constant always in shear history in the present invention, and interface normal direction stress stability, and the measurement result of interface mechanics characteristic index is accurate, reliable.
Description
Technical field
The invention belongs to technical field of civil engineering, it is related to a kind of roadbed filling and Earthworking reinforced bar interface mechanics characteristic measurement
Device and measuring method.
Background technique
With the continuous propulsion of China railways, highway engineering infrastructure, especially high-speed rail transport undertaking flourish,
Subgrade protection in its Process of Engineering Construction is most important to the safe operation of road transport, sends out when using Earthworking reinforced bar class material
Wave its friction-bar theory between roadbed filling with it is reinforcing road bed when, earth structure reinforce synthesis mechanical property be work
Key problem in journey design, and the section of the contact interface of roadbed filling and Earthworking reinforced bar shear strength under certain stress condition
The basic problem of urgent need to resolve when, accurate measurement are then engineer applications.
It is existing to be primarily present following several points about filler and Earthworking reinforced bar interface mechanics characteristic detecting apparatus and measuring method
Defect: (1) when the conventional filler of separated subgrade up and down and Earthworking reinforced bar interface shear strength measure, contact area is continuous
It reduces, measured shear strength is too conservative compared with actual conditions；(2) general shear box measurement device is mainly based upon lever and adds
Load acts on vertical stress and sets interface normal direction stress state, and size is unstable with the variation of the section of shear and is difficult to control
System.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of roadbed filling and Earthworking reinforced bar interface mechanics characteristic measurement fills
It sets, roadbed filling and the contact area at Earthworking reinforced bar interface are constant always in shear history, and interface normal direction stress stability, boundary
The measurement result of face mechanical characteristic index is accurate, reliable, solves problems of the prior art.
It is another object of the invention to provide a kind of roadbed fillings and Earthworking reinforced bar interface mechanics characteristic measurement method.
The technical scheme adopted by the invention is that a kind of roadbed filling and Earthworking reinforced bar interface mechanics characteristic detecting apparatus,
Including horizontally disposed bottom plate, bottom plate is equipped with shearing rotating disk, and shearing rotating disk includes the interior packing cavity of cartridge type, interior packing cavity
Outside be equipped with the outer packing cavity of circular ring shape, interior packing cavity is relatively rotatable to each other with outer packing cavity, the bottom centre of interior packing cavity
It is connected by the output end of shaft and device for revolving and driving, the relative rotation face of interior packing cavity and outer packing cavity is equipped with circular ring shape
Earthworking reinforced bar, freely roll connection between interior packing cavity and bottom plate, the center of interior packing cavity is equipped with cylindrical the blowing pressure
Device, interior packing cavity, outer packing cavity, Earthworking reinforced bar, the blowing pressure device coaxial line and height are identical；Interior packing cavity, outer filler
Be equipped with pressing device above the cover board of chamber, interior packing cavity, outer filler cover board freely rolled between corresponding pressing device respectively
Dynamic connection.
Further, the center of the bottom plate is equipped with circular groove, is equipped with rotary-tray in circular groove, rotary-tray with
Rolling element is equipped between circular groove, rotary-tray is coaxial with interior packing cavity and is detachably connected, and the center of rotary-tray is equipped with
Shaft, shaft are connect by bearing with bottom plate, and the lower end of shaft is across the bearing running-on of bearing and defeated with device for revolving and driving
Outlet snaps connection, and the lower end build-in of shaft is inside bearing running-on.
Further, the bottom of the rotary-tray is equipped with the first roller marks groove, rolls and is connected in the first roller marks groove
Ball.
Further, the pressing device includes top panel, and top panel is horizontally placed on the top of bottom plate, bottom plate with above
Multiple collateral hack levers being used to support are equipped between plate, collateral hack lever is mutually perpendicular to bottom plate, and collateral hack lever passes through the second positioning
Screw is connect with top panel, and the bottom of bottom plate is equipped with pedestal；The upper port of interior packing cavity be equipped with inner ring cover board, outer packing cavity it is upper
Port is equipped with outer ring cover board, and the top of inner ring cover board is equipped with bottom panel, and shape, the size of bottom panel and inner ring cover board match,
Rolling element is equipped between inner ring cover board and bottom panel；The top of outer ring cover board is equipped with pressing plate, is equipped between outer ring cover board and pressing plate
Rolling element, pressing plate are connect by the first positioning screw with collateral hack lever, and bottom panel passes through vertical center bearing bracket bar and top panel
Connection, center bearing bracket bar are connect by fastening screw with top panel；Collateral hack lever, center bearing bracket bar surface be equipped with screw thread.
Further, the upper surface of the inner ring cover board is equipped with the second roller marks groove of annular, the upper surface of outer ring cover board
Equipped with annular third roller marks groove, is rolled in the second roller marks groove, third roller marks groove and be connected with ball.
Further, the top center of the bottom panel is twisted by threaded hole with center bearing bracket bar and is solidly connected, threaded hole
Edge is equipped with the high edge of a wing projected upwards.
Further, the centre of the blowing pressure device is equipped with hollow cavity, and shaft protrudes into hollow cavity.
Further, the blowing pressure device is the blowing pressure pouch, and the blowing pressure pouch is equipped with forced air valve
Interface, the blowing pressure pouch use rubber material.
Further, the device for revolving and driving is stepper motor.
A kind of measuring method of roadbed filling and Earthworking reinforced bar interface mechanics characteristic detecting apparatus, specifically according to the following steps
It carries out:
S1 debugs the levelness of bottom plate, adjusts pressing device and guarantees to press vertically to shearing rotating disk；
S2 uniformly smears lubricant layer, placement in layers roadbed filling in shearing rotating disk inner wall and bottom surface, and filling-up thickness is shearing rotation
When the 1/5-1/6 of turntable height, the Earthworking reinforced bar of circular ring shape is vertically inserted into roadbed filling, Earthworking reinforced bar be placed in interior packing cavity with
On the relative rotation face of outer packing cavity, scheduled pressure value is applied to the blowing pressure device, is controlled after plucking filler surface using layering
Dry density method processed disposably fills filler to shearing rotating disk top surface；
S3, the inflating pressure into the blowing pressure device, compacting filler until close to shearing rotating disk port, cover inner ring cover board,
Interior packing cavity is mounted on rotary-tray by outer ring cover board, positioning, is adjusted pressing device and is pressed respectively against interior packing cavity, outer filler
On the cover board of chamber, interior packing cavity, outer filler cover board connection is freely rolled between corresponding pressing device respectively；
S4 sets the slewing rate of device for revolving and driving and starting, and interior packing cavity is rotated relative to outer packing cavity, simulates roadbed filling
With the interface shearing of Earthworking reinforced bar；
S5 obtains the atmospheric pressure value of the blowing pressure device under setting slewing rate, and the interface of roadbed filling layer and Earthworking reinforced bar, which is cut, answers
Power is determined according to the slewing rate of device for revolving and driving；It is by abscissa, shear stress on interface of the atmospheric pressure value of the blowing pressure device
Ordinate does law curve, is fitted linear relationship between the two, and the interface mechanics for obtaining roadbed filling layer and Earthworking reinforced bar are special
Property index.
The invention has the advantages that having the advantage that
1. can guarantee that roadbed filling contacts work with the interface of Earthworking reinforced bar always the present invention is based on rotational circle cylinder cut mode
With contact area remains unchanged, and overcomes and separate type shear box is conventionally descended constantly to reduce in shear history contact surface, causes to survey
Determine the defect of result inaccuracy.During conventional staight scissors method measurement roadbed filling and Earthworking reinforced bar interface mechanics characteristic, cut
Section is fixed but shearing contact area can reduce with shear history and constantly, leads to test result and reality so not
It accords with, the reinforcement material sample of selection standard area in test, the practical basis area than banketing is much smaller, in reinforcement material industry
In actual contact surface it is bigger, the result measured is closer to actual value.Compared with conventional staight scissors method, the present invention uses rotating cylindrical
Face cut mode, so that roadbed filling and Earthworking reinforced bar contact area are big, it can more superior, intuitive reflection Earthworking reinforced bar and filler
The friction of contact interface, embedded squeezing mechanical function improve the accuracy of roadbed filling and Earthworking reinforced bar interface mechanics characteristic index.
2. the cylindrical the blowing pressure device of present invention shearing rotating disk internal axis position can be realized radial pressure
Apply, in shearing overall process steady implementation contact surface normal pressure, guarantees interface normal direction stress stability, overcome conventional dislocation type
Contact stress, which is reduced, with the section of shear acts on changed defect.
3. surfaces of revolution measuring method of the invention be roadbed filling and Earthworking reinforced bar interact quantitative target research with
Judgement provides a kind of new thinking, and a full set of component is packed system, it can be achieved that local part exchanging,
4. continuous mode of the present invention is simple and fast, measurement result is accurate, reliable, can obtain accurate roadbed filling and geotechnique adds
Muscle interface mechanics characteristic index, the determination for crucial ceramic-metal bond mechanics parameter in reinforced structure design calculating provide foundation, are
The Safety Evaluation Analysis of system provides scientific basis, practical application value with higher.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
Fig. 2 is the structural schematic diagram that rotating disk is sheared in the embodiment of the present invention.
Fig. 3 is the structural schematic diagram of insole board of the embodiment of the present invention.
Fig. 4 is the top view of insole board of the embodiment of the present invention.
Fig. 5 is the structural schematic diagram of external ring lid plate in the embodiment of the present invention, inner ring cover board.
Fig. 6 is the fixed form schematic diagram of collateral hack lever in the embodiment of the present invention.
In figure, 1. shearing rotating disks, 2. bottom plates, 3. center bearing bracket bars, 4. stepper motors, 5. pedestals, 6. top panels, 7. is tight
Gu screw, 8. bottom panels, 9. pressing plates, 10. collateral hack levers, 11. Earthworking reinforced bars, 12. shafts, 13. balls, 14. outer ring cover boards,
15. inner ring cover board, 16. roadbed filling layers, 17. the blowing pressure pouches, 18. bearings, 19. bearing running-ons, 20. rotary-trays, 21.
Circular groove, 22. first roller marks grooves, 23. anchor apertures, 24. second roller marks grooves, 25. third roller marks grooves, 26. first
Positioning screw, 27. second positioning screws.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
The structure of measurement device of the present invention, as shown in Figs. 1-2, including horizontally disposed bottom plate 2, bottom plate 2 are equipped with shearing
Rotating disk 1, shearing rotating disk 1 include the interior packing cavity of cartridge type, and the outside of interior packing cavity is equipped with the outer packing cavity of circular ring shape, inside fills out
Material chamber is relatively rotatable to each other with outer packing cavity, and the bottom centre of interior packing cavity is connected by the output end of shaft 12 and stepper motor 4
It connects, the relative rotation face of interior packing cavity and outer packing cavity is equipped with the Earthworking reinforced bar 11 of circular ring shape, between interior packing cavity and bottom plate 2
Freely to roll connection, the center of interior packing cavity is equipped with cylindrical the blowing pressure device, and the blowing pressure device passes through inflation pressure
Roadbed filling pressure in the internal packing cavity of power, and pressure value can be surveyed, and guarantee interface normal direction stress stability；It is inflated in the present embodiment
Pressure apparatus uses the blowing pressure pouch 17, interior packing cavity, outer packing cavity, Earthworking reinforced bar 11,17 coaxial line of the blowing pressure pouch
And height is identical；Interior packing cavity, outer packing cavity cover board above be equipped with pressing device, the cover board point of interior packing cavity, outer filler
Do not roll connection freely between corresponding pressing device.
Pressing device includes top panel 6, and top panel 6 is horizontally placed on the top of bottom plate 2, sets between bottom plate 2 and top panel 6
There are multiple collateral hack levers 10 being used to support, collateral hack lever 10 is mutually perpendicular to bottom plate 2, and the bottom of bottom plate 2 is equipped with pedestal 5, is used
In support whole device；The upper port of interior packing cavity is equipped with inner ring cover board 15, and the upper port of outer packing cavity is equipped with outer ring cover board 14,
The top of inner ring cover board 15 is equipped with bottom panel 8, and bottom panel 8 and shape, the size of inner ring cover board 15 match, inner ring cover board 15 and
Rolling element is equipped between bottom panel 8, the top of outer ring cover board 14 is equipped with pressing plate 9, is equipped with and rolls between outer ring cover board 14 and pressing plate 9
Body, bottom panel 8 are connect by vertical center bearing bracket bar 3 with top panel 6, and center bearing bracket bar 3 passes through fastening screw 7 and top panel
6 connections；It is twisted and is solidly connected by threaded hole with center bearing bracket bar 3 among the top of bottom panel 8, the edge of threaded hole is equipped with prominent upwards
The height on the high edge of a wing out, Gao Yiyuan is 4cm, plays the role of the pressing to bottom panel 8, so that shearing rotating disk 1 is in rotation
It will not loosen.
As shown in fig. 6, the surface of collateral hack lever 10, center bearing bracket bar 3 is equipped with screw thread, collateral hack lever 10 is fixed by second
Position screw 27 is connect with top panel 6, and pressing plate 9 is connect by the first positioning screw 26 with collateral hack lever 10, to push down bottom panel 8,
But the constant speed rotation of shear history will not be influenced；Pressing plate 9 is positioned by the first positioning screw 26, and bottom panel 8 passes through fastening screw 7
Positioning, pressing plate 9 push down outer ring cover board 14, and bottom panel 8 pushes down inner ring cover board 15, to the roadbed filling layer 16 in shearing rotating disk 1
Apply vertical surface constraint with the Earthworking reinforced bar 11 vertically laid, will not cause when starting stepper motor 4 and carrying out shearing test
Sample protuberance slips.
The structure of bottom plate 2, as shown in Figure 3-4, the center of bottom plate 2 are equipped with circular groove 21, are equipped with rotation in circular groove 21
Ask disk 20, and rolling element is equipped between rotary-tray 20 and circular groove 21, specifically, the bottom of rotary-tray 20 is equipped with first
Roller marks groove 22, interior roll of the first roller marks groove 22 are connected with ball 13；Rotary-tray 20 is coaxial with interior packing cavity and detachable
Connection, the center of rotary-tray 20 are equipped with shaft 12, and shaft 12 is connect by bearing 18 with bottom plate 2, and the lower end of shaft 12 passes through
The bearing running-on 19 of bearing 18 is simultaneously snapped connection with the output end of stepper motor 4, and 12 lower end build-in of shaft is in bearing running-on 19
Portion, shaft 12 can be rotated around the outer sleeve of bearing 18 with extremely low resistance；Bottom plate 2, which is equipped with, is anchored aperture 23, collateral hack lever 10
Lower end, which passes through, to be anchored aperture 23 and connect with bottom plate 2.
The structure of inner ring cover board 15, outer ring cover board 14, as shown in figure 5, the upper surface of inner ring cover board 15 is equipped with the of annular
Two roller marks grooves 24, the upper surface of outer ring cover board 14 are equipped with the third roller marks groove 25 of annular, the second roller marks groove 24, third rolling
It is rolled in trace groove 25 and is connected with ball 13, realized and freely roll connection, outer ring cover board between inner ring cover board 15 and bottom panel 8
Connection is rolled between 14 and pressing plate 9, freely in favor of rotating with shearing rotating disk 1；The ball 13 at 14 top of outer ring cover board is accepted
The embankment fill material that outer packing cavity is passed in the pressure and perpendicular acting to outer ring cover board 14 of pressing plate 9, so that shearing rotates
Roadbed filling in disk 1 integrally reaches uniform stress, and keeps the original state filled, in order to shearing test
Implement.
Wherein, ball 13 is not provided between the bottom of outer packing cavity and bottom plate 2, avoid outer packing cavity with interior packing cavity and
Rotation；When filling roadbed packing layer 16, outer ring cover board 14 needs to open, and the needs of outer ring cover board 14 are covered after the completion of filling and pass through rolling
Pearl 13 transmits the pressure of pressing plate 9 to outer packing cavity, while needing to reduce the frictional resistance between pressing plate 9 and outer ring cover board 14；Pressing plate 9
Frictional resistance between outer ring cover board 14 can make twisting resistance bigger than normal, i.e., excessively estimate the boundary of practical reinforcement material and filler
Face effect, obtained intensity index are higher.Thus freely roll connection between outer ring cover board 14 and pressing plate 9, in the present embodiment
Ball 13 is equipped between pressing plate 9 and outer ring cover board 14.
The blowing pressure pouch 17 is equipped with forced air valve interface, and the blowing pressure pouch 17 uses rubber material, gas cell
Bag 17 centre be equipped with hollow cavity, shaft 12 protrudes into hollow cavity, after 17 inflating pressure of the blowing pressure pouch, using turn
Axis 12 limits the position of the blowing pressure pouch 17, can accurately apply horizontally pressure to roadbed filling layer 16, improve interface
The stability of normal stress.
The diameter of outer packing cavity is 50cm, and the diameter of interior packing cavity is 29.8cm, and the diameter of the blowing pressure pouch 17 is
15cm, interior packing cavity, outer packing cavity, Earthworking reinforced bar 11, the blowing pressure pouch 17 height be 30cm；Interior packing cavity is filled out outside
The sidewall thickness for expecting chamber is 1cm；Inner ring cover board 15 is the stainless steel plate of diameter 29.8cm, thickness 1cm, and outer ring cover board 14 is straight
Diameter is the stainless ring steel plate of 50cm, width 10cm.
Bottom edge 5cm of the first roller marks groove 22 away from rotary-tray 20, the second roller marks groove 24 is away from inner ring cover board 15
Edge 5cm, third roller marks groove 25 are set to 14 center of outer ring cover board, so that between rotary-tray 20 and circular groove 21,
It can be freely rotated between inner ring cover board 15 and bottom panel 8, between outer ring cover board 14 and pressing plate 9, and load is uniform；First roller marks
Groove 22, the second roller marks groove 24, third roller marks groove 25 section be semicircle, respectively with the shape of corresponding ball 13,
Size matching.
In the present embodiment, bottom plate 2 with a thickness of 8cm, the diameter of circular groove 21 is 30cm, depth 3cm, rotary-tray
20 diameter is 29.8cm, and the depth of the first roller marks groove 22 is 1cm, and the diameter of bearing running-on 19 is 4cm, outer with shaft 12
Diameter matches, and the housing ring diameter of bearing 18 is 8cm.
Collateral hack lever 10 is the solid stainless steel that diameter is 5cm, and it is 2mm, groove depth that usual range, which is processed into trace spacing,
For the forward screw thread of 1mm, for fastening screw 7 with a thickness of 2cm, the diameter of center bearing bracket bar 3 is 6cm, screw thread setting and collateral hack lever
10 is identical.
The working principle of measurement device of the present invention is carried by screwed collateral hack lever 10 and 27 pairs of the second positioning screw
There is the bottom plate 2 of shearing rotating disk 1 to be fixed, device is first adjusted into calibration before test and assists flattening by spirit level；Stepping
Motor 4 drives rotary-tray 20 to rotate by shaft 12, and then drives interior packing cavity constant speed rotation, and outer packing cavity is remain stationary,
Can exist when first motion it is mobile may, but after swing offset increases, the roadbed filling of outer packing cavity by pressing plate 9 pressure and cut
It cuts the inner sidewall frictional resistance of rotating disk 1 and resists the frictional resistance rotated through interior packing cavity, and necessarily sent out at 11 layers of Earthworking reinforced bar
Raw shearing slip, so that the cylindrical surface that Earthworking reinforced bar 11 surrounds is shear surface, to realize roadbed filling layer 16 and Earthworking reinforced bar
11 interface mechanics characteristic measurement obtains interface shear strength.
Roadbed filling of the present invention and Earthworking reinforced bar interface mechanics characteristic measurement method, specifically follow the steps below:
S1 installs and debugs entire experimental rig, and the levelness including debugging bottom plate 2 adjusts the force direction of pressing device, protects
Card presses to shearing rotating disk 1 vertically；Specifically, being adjusted by the levelness of regulating base board 2, top panel 6, bottom panel 8, pressing plate 9
The vertical degree of center bearing bracket bar 3, collateral hack lever 10 guarantees that center bearing bracket bar 3, collateral hack lever 10 are applied to shearing rotating disk 1 vertically
Power；Roadbed filling to be tested and Earthworking reinforced bar material are grouped, Earthworking reinforced bar 11 is annular.
S2 uniformly smears lubricant layer in shearing 1 inner wall of rotating disk and bottom surface, by every group of roadbed filling in shearing rotating disk 1
In pave, placement in layers roadbed filling, filling-up thickness be shear 1 height of rotating disk 1/5-1/6(the present embodiment in paving thickness
When for 5-6cm), by the Earthworking reinforced bar 11 of circular ring shape, vertically insertion roadbed filling, Earthworking reinforced bar 11 are placed in interior packing cavity and fill out outside
On the relative rotation face for expecting chamber, scheduled pressure value is applied to the blowing pressure pouch 17, uses hierarchical control after plucking filler surface
Dry density method disposably fills filler to shearing 1 top surface of rotating disk, controls the geometric shape and stress shape of roadbed filling layer 16
State.
S3, the inflating pressure into the blowing pressure pouch 17, compacting filler shear 1 port of rotating disk up to close, specifically,
1 port 1-3cm of rotating disk is sheared, is allowed some leeway to the inner ring cover board 15 covered on subsequent, it is unrestrained to prevent roadbed filling layer 16, it covers
Inner ring cover board 15, outer ring cover board 14, interior packing cavity is mounted on rotary-tray 20, positioning, covers bottom panel 8, side fastening pressure
Rotating disk 1 is sheared in 9 side manual adjustment fine motion of plate will not be stuck；Bottom panel 8, pressing plate 9 are pressed respectively against interior packing cavity, outer packing cavity
On cover board, interior packing cavity, outer filler cover board connection is freely rolled by ball 13 between bottom panel 8, pressing plate 9 respectively, guarantor
Packing cavity is freely rotated in demonstrate,proving.
S4 sets 4 slewing rate V rad/min of stepper motor, starts stepper motor 4, the relatively outer packing cavity of interior packing cavity
The interface shearing of roadbed filling and Earthworking reinforced bar 11 is simulated in rotation, carries out roadbed filling layer 16 and 11 interface shearing of Earthworking reinforced bar
Test.
S5 obtains the atmospheric pressure value of the blowing pressure pouch 17 under setting slewing rate, roadbed filling layer 16 and Earthworking reinforced bar 11
Shear stress on interface determine that the atmospheric pressure value of the blowing pressure pouch 17 is numerically equivalent to according to the slewing rate of stepper motor 4
The interfacial pressure value of roadbed filling layer 16 and Earthworking reinforced bar 11, every group of roadbed filling to be tested and Earthworking reinforced bar material at least obtain
3 groups of above-mentioned data are obtained, are that ordinate does law curve using interfacial pressure value as abscissa, shear stress on interface, fitting is between the two
Linear relationship, shear strength envelope curve can be obtained in the coordinate system, the envelope curve have certain intercept and inclination angle, as try
Test the mechanical characteristic to be obtained (shear strength) index.
The shear stress on interface of roadbed filling layer 16 and Earthworking reinforced bar 11 is determined according to the slewing rate of stepper motor 4, is passed through
Measured value under different rotating speeds determines, is known in this field；With existing apparatus compared with method, the present invention can guarantee to stablize
Constant contact surface and stress, can obtain more reliable index.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of roadbed filling and Earthworking reinforced bar interface mechanics characteristic detecting apparatus, which is characterized in that including horizontally disposed bottom
Plate (2), bottom plate (2) are equipped with shearing rotating disk (1), and shearing rotating disk (1) includes the interior packing cavity of cartridge type, interior packing cavity it is outer
Portion is equipped with the outer packing cavity of circular ring shape, and interior packing cavity is relatively rotatable to each other with outer packing cavity, and the bottom centre of interior packing cavity passes through
Shaft (12) is connect with the output end of device for revolving and driving, and the relative rotation face of interior packing cavity and outer packing cavity is equipped with circular ring shape
Earthworking reinforced bar (11), freely roll connection between interior packing cavity and bottom plate (2), the center of interior packing cavity is equipped with cylindrical filling
Atmospheric pressure device, interior packing cavity, outer packing cavity, Earthworking reinforced bar (11), the blowing pressure device coaxial line and height are identical；Interior filler
Chamber, outer packing cavity cover board above be equipped with pressing device, interior packing cavity, outer filler cover board respectively with corresponding pressing device it
Between freely roll connection.
2. a kind of roadbed filling according to claim 1 and Earthworking reinforced bar interface mechanics characteristic detecting apparatus, feature exist
In the center of the bottom plate (2) is equipped with circular groove (21), is equipped with rotary-tray (20) in circular groove (21), rotary-tray
(20) rolling element is equipped between circular groove (21), rotary-tray (20) is coaxial with interior packing cavity and is detachably connected, rotation
The center of pallet (20) is equipped with shaft (12), and shaft (12) is connect by bearing (18) with bottom plate (2), and the lower end of shaft (12) is worn
It crosses the bearing running-on (19) of bearing (18) and is snapped connection with the output end of device for revolving and driving, the lower end build-in of shaft (12)
It is internal in bearing running-on (19).
3. a kind of roadbed filling according to claim 2 and Earthworking reinforced bar interface mechanics characteristic detecting apparatus, feature exist
In the bottom of the rotary-tray (20) is equipped with the first roller marks groove (22), rolls in the first roller marks groove (22) and is connected with rolling
Pearl (13).
4. a kind of roadbed filling according to claim 1 and Earthworking reinforced bar interface mechanics characteristic detecting apparatus, feature exist
In the pressing device includes top panel (6), and top panel (6) is horizontally placed on the top of bottom plate (2), bottom plate (2) and top panel
(6) multiple collateral hack levers (10) being used to support are equipped between, collateral hack lever (10) is mutually perpendicular to bottom plate (2), collateral hack lever
(10) it is connect by the second positioning screw (27) with top panel (6), the bottom of bottom plate (2) is equipped with pedestal (5)；Interior packing cavity it is upper
Port is equipped with inner ring cover board (15), and the upper port of outer packing cavity is equipped with outer ring cover board (14), and the top of inner ring cover board (15) is equipped with
Bottom panel (8), bottom panel (8) and shape, the size of inner ring cover board (15) match, inner ring cover board (15) and bottom panel (8) it
Between be equipped with rolling element；The top of outer ring cover board (14) is equipped with pressing plate (9), is equipped with and rolls between outer ring cover board (14) and pressing plate (9)
Body, pressing plate (9) are connect by the first positioning screw (26) with collateral hack lever (10), and bottom panel (8) passes through vertical center bearing bracket
Bar (3) is connect with top panel (6), and center bearing bracket bar (3) is connect by fastening screw (7) with top panel (6)；Collateral hack lever
(10), the surface of center bearing bracket bar (3) is equipped with screw thread.
5. a kind of roadbed filling according to claim 4 and Earthworking reinforced bar interface mechanics characteristic detecting apparatus, feature exist
In the upper surface of the inner ring cover board (15) is equipped with the second roller marks groove (24) of annular, and the upper surface of outer ring cover board (14) is set
There is the third roller marks groove (25) of annular, is rolled in the second roller marks groove (24), third roller marks groove (25) and be connected with ball
(13).
6. a kind of roadbed filling according to claim 4 and Earthworking reinforced bar interface mechanics characteristic detecting apparatus, feature exist
In the top center of the bottom panel (8), which is twisted with center bearing bracket bar (3) by threaded hole, to be solidly connected, and the edge of threaded hole is equipped with
The high edge of a wing projected upwards.
7. a kind of roadbed filling according to claim 1 and Earthworking reinforced bar interface mechanics characteristic detecting apparatus, feature exist
In the centre of the blowing pressure device is equipped with hollow cavity, and shaft (12) protrudes into hollow cavity.
8. a kind of roadbed filling according to claim 1 or claim 7 and Earthworking reinforced bar interface mechanics characteristic detecting apparatus, feature
It is, the blowing pressure device is the blowing pressure pouch (17), and the blowing pressure pouch (17) is equipped with forced air valve interface,
The blowing pressure pouch (17) uses rubber material.
9. a kind of roadbed filling according to claim 1 or 2 and Earthworking reinforced bar interface mechanics characteristic detecting apparatus, feature
It is, the device for revolving and driving is stepper motor (4).
10. a kind of roadbed filling and Earthworking reinforced bar interface mechanics characteristic measurement method, which is characterized in that using such as claim 1-
Any one of 7 roadbed fillings and Earthworking reinforced bar interface mechanics characteristic detecting apparatus, specifically follow the steps below:
S1 debugs the levelness of bottom plate (2), adjusts pressing device and guarantees to press vertically to shearing rotating disk (1)；
S2 uniformly smears lubricant layer, placement in layers roadbed filling in shearing rotating disk (1) inner wall and bottom surface, and filling-up thickness is to cut
When cutting the 1/5-1/6 of rotating disk (1) height, the Earthworking reinforced bar (11) of circular ring shape is vertically inserted into roadbed filling, Earthworking reinforced bar
(11) it is placed on the relative rotation face of interior packing cavity and outer packing cavity, scheduled pressure value is applied to the blowing pressure device, plucking is filled out
Filler is disposably filled to shearing rotating disk (1) top surface using hierarchical control dry density method behind material surface；
S3, the inflating pressure into the blowing pressure device, compacting filler cover interior ring cowling until close to shearing rotating disk (1) port
Plate (15), outer ring cover board (14), interior packing cavity is mounted on rotary-tray (20), positioning, is adjusted pressing device and is pressed respectively against
Interior packing cavity, outer packing cavity cover board on, interior packing cavity, outer filler cover board freely rolled between corresponding pressing device respectively
Connection；
S4 sets the slewing rate of device for revolving and driving and starting, and interior packing cavity is rotated relative to outer packing cavity, simulates roadbed filling
With the interface shearing of Earthworking reinforced bar (11)；
S5 obtains the atmospheric pressure value of the blowing pressure device under setting slewing rate, roadbed filling layer (16) and Earthworking reinforced bar (11)
Shear stress on interface is determined according to the slewing rate of device for revolving and driving；Using the atmospheric pressure value of the blowing pressure device as abscissa, interface
Shear stress is that ordinate does law curve, is fitted linear relationship between the two, obtains roadbed filling layer (16) and Earthworking reinforced bar
(11) interface mechanics characteristic index.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910350797.0A CN110031337B (en) | 2019-04-28 | 2019-04-28 | Device and method for measuring mechanical properties of roadbed filler and geotechnical reinforcement interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910350797.0A CN110031337B (en) | 2019-04-28 | 2019-04-28 | Device and method for measuring mechanical properties of roadbed filler and geotechnical reinforcement interface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110031337A true CN110031337A (en) | 2019-07-19 |
| CN110031337B CN110031337B (en) | 2021-11-19 |
Family
ID=67240590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910350797.0A Active CN110031337B (en) | 2019-04-28 | 2019-04-28 | Device and method for measuring mechanical properties of roadbed filler and geotechnical reinforcement interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110031337B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114166659A (en) * | 2021-12-07 | 2022-03-11 | 长沙学院 | Device for testing shearing characteristic of waste tire-soil vertical interface |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101256137A (en) * | 2008-03-24 | 2008-09-03 | 山东省交通科学研究所 | Dynamic simulation tester for highroad and deck paving interlaminar action |
| CN101373174A (en) * | 2008-07-16 | 2009-02-25 | 中国科学院武汉岩土力学研究所 | Direct shear apparatus capable of directly measuring interface friction force |
| CN102226745A (en) * | 2011-04-07 | 2011-10-26 | 河海大学 | Method and device for testing dynamic shear properties of aggregate-mortar transition region |
| CN104833592A (en) * | 2015-05-16 | 2015-08-12 | 山西省交通科学研究院 | Direct shear test system for anisotropy of geosynthetics and implementation method of direct shear test system |
| CN106596297A (en) * | 2017-03-05 | 2017-04-26 | 南京大学 | Test apparatus and method of mechanical behavior characteristic of pile-soil interface of energy pile |
| CN106644765A (en) * | 2017-01-09 | 2017-05-10 | 浙江大学 | Ring-shearing instrument used in indoor test pile soil interface and detection method |
| CN108801806A (en) * | 2018-05-03 | 2018-11-13 | 南昌大学 | A kind of multifunctional large-scale temperature control saturation staight scissors simple shear double-purpose instrument |
| CN108801804A (en) * | 2018-03-21 | 2018-11-13 | 中国地质大学（武汉） | A kind of vertical shearing face ring scissor test instrument applying confining pressure |
| CN108844892A (en) * | 2018-08-31 | 2018-11-20 | 中铁第五勘察设计院集团有限公司 | The experiment of friction performance device and measuring method of ceramic-metal bond in Reinforced Material with Clay Engineering |
| CN109580387A (en) * | 2019-01-17 | 2019-04-05 | 郑州大学 | A kind of soil layer interface shear testing maschine and soil layer interface shearing test case |
-
2019
- 2019-04-28 CN CN201910350797.0A patent/CN110031337B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101256137A (en) * | 2008-03-24 | 2008-09-03 | 山东省交通科学研究所 | Dynamic simulation tester for highroad and deck paving interlaminar action |
| CN101373174A (en) * | 2008-07-16 | 2009-02-25 | 中国科学院武汉岩土力学研究所 | Direct shear apparatus capable of directly measuring interface friction force |
| CN102226745A (en) * | 2011-04-07 | 2011-10-26 | 河海大学 | Method and device for testing dynamic shear properties of aggregate-mortar transition region |
| CN104833592A (en) * | 2015-05-16 | 2015-08-12 | 山西省交通科学研究院 | Direct shear test system for anisotropy of geosynthetics and implementation method of direct shear test system |
| CN106644765A (en) * | 2017-01-09 | 2017-05-10 | 浙江大学 | Ring-shearing instrument used in indoor test pile soil interface and detection method |
| CN106596297A (en) * | 2017-03-05 | 2017-04-26 | 南京大学 | Test apparatus and method of mechanical behavior characteristic of pile-soil interface of energy pile |
| CN108801804A (en) * | 2018-03-21 | 2018-11-13 | 中国地质大学（武汉） | A kind of vertical shearing face ring scissor test instrument applying confining pressure |
| CN108801806A (en) * | 2018-05-03 | 2018-11-13 | 南昌大学 | A kind of multifunctional large-scale temperature control saturation staight scissors simple shear double-purpose instrument |
| CN108844892A (en) * | 2018-08-31 | 2018-11-20 | 中铁第五勘察设计院集团有限公司 | The experiment of friction performance device and measuring method of ceramic-metal bond in Reinforced Material with Clay Engineering |
| CN109580387A (en) * | 2019-01-17 | 2019-04-05 | 郑州大学 | A kind of soil layer interface shear testing maschine and soil layer interface shearing test case |
Non-Patent Citations (2)
| Title |
|---|
| 冯研: "弥勒非低矮路基超固结膨胀土地基沉降特征", 《中国公路学报》 * |
| 邓爱平: "基于冻融界面对路基土体抗剪强度的影响研究", 《湖南交通科技》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114166659A (en) * | 2021-12-07 | 2022-03-11 | 长沙学院 | Device for testing shearing characteristic of waste tire-soil vertical interface |
| CN114166659B (en) * | 2021-12-07 | 2024-04-12 | 长沙学院 | Junked tire-soil vertical interface shear characteristic testing arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110031337B (en) | 2021-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109163985B (en) | In-situ testing device and method for testing shear strength and long-term creep deformation of rock sample | |
| CN110726822B (en) | Method for testing expansibility and shear strength of carbonized soil in carbonization process of magnesium oxide solidified soil | |
| CN104713788B (en) | Strain-control type tension-shearing direct shear apparatus | |
| US5911164A (en) | Compaction and pavement design testing machine and method for testing flexible pavement materials | |
| CN105675409A (en) | Integrated type rock mass structural surface direct shear apparatus and direct shear test method | |
| CN101839831B (en) | Bond strength testing method of concrete rough aggregate interface | |
| CN201191175Y (en) | Road surface paving material loosepaving thickness measuring instrument | |
| CN110031337A (en) | Roadbed filling and Earthworking reinforced bar interface mechanics characteristic detecting apparatus and measuring method | |
| CN109856001A (en) | A kind of rosette-Soil Interface shearing mechanical behavior synthesis measuring device and application method | |
| CN108801357A (en) | A kind of portable multi-function soil body injection integrated test facility and device based on fiber grating | |
| CN209706704U (en) | A kind of thickness detection apparatus for asphalt pavement construction management | |
| CN114965077A (en) | Automatic high-precision rock expansion test device and application method thereof | |
| CN205483741U (en) | Compaction test device of cyclic annular sample of preparation remolded soil | |
| CN213142734U (en) | Detection apparatus for highway engineering bituminous paving loose thickness | |
| CN106644633A (en) | Multifunctional geo-technical testing sample cutting device | |
| CN212410304U (en) | High-speed railway foundation dynamic loading model test device for underlying underground engineering | |
| CN211601937U (en) | Static detection inclinometer for surveying high-rise building | |
| CN111305179A (en) | Natural gravel roadbed quality detection and evaluation method based on vibration frequency | |
| CN209099338U (en) | A kind of ground loaded densification degree detector | |
| Loach | Repeated loading of fine grained soils for pavement design | |
| CN106556542A (en) | A kind of soil-rock mixture staight scissors relaxation test device and test method | |
| CN207964415U (en) | Sand replacement method detects fill subgrade compactness excavating device of testing pits | |
| CN206146815U (en) | Indoor survey device of frictional force between soil body and structure thing | |
| CN206329335U (en) | A kind of testing equipment of rational evaluation rock mass TBM constructions suitability | |
| CN212432128U (en) | Road grade rod for engineering supervision |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |