CN104198299B - interlayer direct shear test device and test method - Google Patents
interlayer direct shear test device and test method Download PDFInfo
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- CN104198299B CN104198299B CN201410377404.2A CN201410377404A CN104198299B CN 104198299 B CN104198299 B CN 104198299B CN 201410377404 A CN201410377404 A CN 201410377404A CN 104198299 B CN104198299 B CN 104198299B
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Abstract
The present invention relates to interlayer direct shear test device and test method.The invention provides a kind of interlayer direct shear test device for pavement structure two-layer equation test specimen, comprising: upper shear box, be configured to change its receiving volume thus adapt with the superstructure of tested pavement structure two-layer equation test specimen；Down cut box, is configured to change its receiving volume thus adapts with the understructure of tested pavement structure two-layer equation test specimen；Vertical loading device, is configured to apply predetermined vertical load to tested pavement structure two-layer equation test specimen directly or indirectly；With horizontal charger, it is configured to apply predetermined shearing force to the upper strata component of tested pavement structure two-layer equation test specimen and the interface layer of lower floor's component directly or indirectly.Additionally, present invention also offers a kind of test method for above-mentioned interlayer direct shear test device.The interlayer direct shear test device of the present invention can be applied to the pavement structure two-layer equation test specimen of Different Plane size and differing heights.
Description
Technical field
The present invention relates to interlayer direct shear test device, particularly relate to a kind of for pavement structure two-layer equation
The interlayer direct shear test device of test specimen and test method.
Background technology
Existing asphalt pavement structural layer interface layer the most non-fully continuous print, and according to the layer described in specification
Between its shearing strength of the bituminous paving the most relatively safety of complete continuously theory hypothesis design, it is impossible to true
Reflect the actual bonding state at interface.Therefore, obtain road surface actual binding ability parameter and just seem the heaviest
Want.At present, the sample plane size as direct shear test is fixing, nonadjustable, and tests power
The research in field is it has been shown that result of the test is had and compares large effect by the sample dimensions that used of test
(that is so-called dimensional effect), the necessary planar dimension making test specimen from the point of view of the angle of theoretical research
Adjustable.And each Laminate construction thickness of difference engineering, different pavement is the most different (such as surface layer
The thickness of asphalt often only has 4cm, and the thickness of semi-rigid type base is at about 20cm).But
The shear box of the fixing test specimen of the direct shear test device used by pavement engineering field is all fixed structure, this
Mean that it can not be applicable to the angle of theoretical research so that the planar dimension of test specimen is adjustable, also imply that
The sample taken out at engineering site also needs to secondary cut and just can serve as test, so can cause test specimen structure
Destruction, reduce test effect accuracy.
Additionally, the cylinder that the field investigation and sampling being used as direct shear test obtains often by scene, road surface drill core
Shape sample, and core drilling machine is in drilling through extractive process, may objective due to subjective anthropic factor or equipment
Reason and core sample is produced disturbance so that interface layer is destroyed, and the interface parameter measured of test is the trueest
Real.
Summary of the invention
One purpose of first aspect present invention is intended to overcome shearing test device of the prior art at least
One defect, it is provided that a kind of interlayer direct shear test device for pavement structure two-layer equation test specimen, its energy
Enough apply various sizes of pavement structure two-layer equation test specimen.
One of first aspect present invention further objective is that and improves upper shear box and/or down cut box as far as possible
The convenience of regulation.
One purpose of second aspect present invention is to provide a kind of for above-mentioned interlayer direct shear test device
Test method.
According to the first aspect of the invention, the invention provides a kind of layer for pavement structure two-layer equation test specimen
Between direct shear test device, wherein, including:
Upper shear box, it is opening down, is configured to: is vertically extended or reclaims, horizontal along level
It is extended to direction or reclaims, and/or be extended along horizontal longitudinal direction or reclaim, to change its receiving
Volume thus adapt with the superstructure of tested pavement structure two-layer equation test specimen；
Down cut box, it is opening up, is configured to: is vertically extended or reclaims, horizontal along level
It is extended to direction or reclaims, and/or be extended along horizontal longitudinal direction or reclaim, to change its receiving
Volume thus adapt with the understructure of tested pavement structure two-layer equation test specimen；
Vertical loading device, is configured to apply to make a reservation for tested pavement structure two-layer equation test specimen directly or indirectly
Vertical load；With
Laterally charger, is configured to directly or indirectly to the upper strata structure of tested pavement structure two-layer equation test specimen
The interface layer of part and lower floor's component applies predetermined shearing force.
Further, also including: above shear platform, it has platform part and is positioned at above described platform part
Upper cover part, described upper shearing platform is formed with accommodation space, to place described upper shear box, described platform
The upper strata component of the lower surface in portion and tested pavement structure two-layer equation test specimen and the interface layer position of lower floor's component
On same plane.
Further, described vertical loading device includes: vertically load passage, and it passes in described upper cover part
Vertical passageway, and the diapire of its one end and described upper shear box is fixing is connected；Vertical loading disc, is arranged on
The top of described vertical loading passage, by pull rope or trussed shore directly or indirectly with described down cut box
Connect；Pressure conduction post, in the described vertical loading passage of its one end insertion, its other end vertically adds with described
The basal surface of load plate contacts against；Hydraulic pump, is configured to delivery hydraulic pressure oil in described vertical loading passage.
Further, also including: down cut platform, it has platform part and is positioned at below described platform part
Base portion, described down cut platform is formed with accommodation space, to place described down cut box, described platform
The upper strata component of the upper surface in portion and tested pavement structure two-layer equation test specimen and the interface layer position of lower floor's component
On same plane.
Further, the base portion of described down cut platform is additionally provided with screw-nut body, is configured to band
The diapire of dynamic described down cut box vertically moves and reaches pre-determined bit at the diapire of described down cut box
Postpone and keep it in this position.
Further, described horizontal charger includes: laterally load passage, and its one end is directly or indirectly
Fix with described upper shear box and be connected；Laterally loading disc, by pull rope or trussed shore be connected to described under cut
Cut flat with platform；Pressure conduction post, its one end inserts in described horizontal loading passage, its other end with described laterally
The vertical contacts side surfaces of loading disc against；Hydraulic pump, is configured to delivery hydraulic pressure in described horizontal loading passage
Oil.
Further, described upper shear box and described down cut box are and have four sidewalls and a diapire
Quadrangle box；
Each sidewall of described upper shear box and/or each sidewall of described down cut box all include that one is stretched
Board component, described expansion plate assembly includes: outer sleeve-board, is formed with receiving cavity in it；And inner sleeve plate, join
It is set to can stretch out to extend sleeve-board described in the area of respective side walls or indentation in described outer sleeve-board to subtract
The area of little respective side walls；
Or, each sidewall of described upper shear box and/or each sidewall of described down cut box all include at least two
Individual expansion plate assembly, each described expansion plate assembly includes: outer sleeve-board, is formed with receiving cavity in it；With
Inner sleeve plate, being configured to stretch out to extend described in the area of respective side walls or indentation in described outer sleeve-board
Sleeve-board is to reduce the area of respective side walls；Each expansion plate assembly in expansion plate assembly described at least two
Flag is configured to along being perpendicular to the direction of telescopic direction of inner sleeve plate at the expansion plate assembly being adjacent
Move on one side of flag, with extension or the area of reduction respective side walls.
Further, each sidewall of described upper shear box and/or each sidewall of described down cut box all include
Two expansion plate assemblies；Each described inner sleeve plate in the horizontal direction in corresponding sleeve-board extended or retracted accordingly
Outer sleeve-board, each described inner sleeve plate is fixing with corresponding outer sleeve-board after moving to precalculated position to be connected；Described in two
The flag of an expansion plate assembly in expansion plate assembly another expansion plate assembly flag one
Vertically move on individual side, and move to behind precalculated position fixing with another expansion plate assembly even
Connect.
Further, also including: multiple girts, each described girt is configured to drive on described
Each sidewall of shear box and/or each sidewall of described down cut box move in the horizontal direction, each described water
Horizontal drawing bar is perpendicular to respective side walls and respective side walls is fixed in its one end.
According to the second aspect of the invention, the invention provides one for any of the above-described kind of interlayer direct shearing
The test method of assay device, including:
Described tested pavement structure two-layer equation test specimen is obtained by the cutting mode of non-drill core；
The receiving that lower floor's component of described tested pavement structure two-layer equation test specimen is put into described down cut box is empty
In, and adjust the receiving space of described down cut box, so that described tested pavement structure two-layer equation test specimen
The sidewall contact accommodating space of the sidewall of lower floor's component and described down cut box against, and make described tested
The upper strata component of pavement structure two-layer equation test specimen and the interface layer of lower floor's component and opening of described down cut box
Mouth end face is in the same plane；
Described upper shear box cover is buckled in described down cut box, and the receiving adjusting described upper shear box is empty
Between, so that the sidewall of lower floor's component of described tested pavement structure two-layer equation test specimen and the appearance of described upper shear box
Receive space sidewall contact against, and make described tested pavement structure two-layer equation test specimen upper strata component and under
The interface layer of layer component is in the same plane with the open end of described upper shear box；
Predetermined vertical load is applied to tested pavement structure two-layer equation test specimen；
Apply predetermined to the upper strata component of tested pavement structure two-layer equation test specimen and the interface layer of lower floor's component
Shearing force.
The interlayer direct shear test device of the present invention because upper shear box and the size adjustable of down cut box, because of
This its can be applied to the pavement structure two-layer equation test specimen of Different Plane size and differing heights, to prevent from satisfying the need
The structural damage of the test specimen that the secondary cut of face structure two-layer equation test specimen causes, significantly improves test effect
Accuracy.
Further, due to shear box upper in the interlayer direct shear test device of the present invention and/or down cut box
Special structure, significantly improve shear box and/or down cut box extension or reclaim convenience.
Further, the interlayer direct shear test device of the present invention both may be used for testing each layer of asphalt surface course
Between the anti-shear performance parameter at interface, may be used for again testing the anti-shearing of interface between the various basic unit in road surface
Performance parameter, it is also possible to for testing the anti-shear performance parameter at interface between top course and basic unit.Additionally,
This interlayer direct shear test device can be not only used for on-the-spot actual road surface cutting sample shearing test it can also be used to
The direct shear test of indoor forming double-layer formula test specimen.
Further, owing to the test method for interlayer direct shear test device of the present invention is by non-brill
The cutting mode of core obtains described tested pavement structure two-layer equation test specimen, preventing due to subjective anthropic factor or
The odjective cause of equipment and core sample is produced disturbance so that interface layer is destroyed.
According to below in conjunction with the accompanying drawing detailed description to the specific embodiment of the invention, those skilled in the art will
More understand the above-mentioned of the present invention and other purposes, advantage and feature.
Accompanying drawing explanation
Some describing the present invention the most by way of example, and not by way of limitation in detail are concrete
Embodiment.Reference identical in accompanying drawing denotes same or similar parts or part.Art technology
Personnel are it should be understood that what these accompanying drawings were not necessarily drawn to scale.In accompanying drawing:
Fig. 1 is the schematic diagram of interlayer direct shear test device according to an embodiment of the invention；
Fig. 2 is the down cut platform in interlayer direct shear test device in accordance with another embodiment of the present invention
Schematic plan；
Fig. 3 is the down cut platform in interlayer direct shear test device in accordance with another embodiment of the present invention
Schematic partial structurtes front view；
Fig. 4 is the diagrammatic top of interlayer direct shear test device in accordance with another embodiment of the present invention
Figure；
Fig. 5 is that the schematically local of interlayer direct shear test device in accordance with another embodiment of the present invention is main
View.
Detailed description of the invention
Fig. 1 is the schematic diagram of interlayer direct shear test device according to an embodiment of the invention.
Embodiments provide a kind of interlayer direct shear test device for pavement structure two-layer equation test specimen,
It includes shear box 11, down cut box 21, vertical loading device and horizontal charger.Upper shear box
11 opening down, it is for accommodating the superstructure of tested pavement structure two-layer equation test specimen；Down cut box
21 opening up, it is for accommodating the understructure of tested pavement structure two-layer equation test specimen；Vertically add and carry
Put and apply predetermined vertical load so that quilt for directly or indirectly to tested pavement structure two-layer equation test specimen
Surveying pavement structure two-layer equation test specimen and bear predetermined vertical load, horizontal charger is configured to directly or indirectly
Ground applies predetermined to the upper strata component of tested pavement structure two-layer equation test specimen and the interface layer of lower floor's component
Shearing force；According to apply vertical load and computation of cutting force or use other method to obtain tested pavement structure
The anti-shear performance parameter of two-layer equation test specimen.
Especially, in order to adapt to various sizes of pavement structure two-layer equation test specimen, upper shear box 11 is configured to:
Vertically it is extended or reclaims, be extended along horizontal transverse direction or reclaim, and/or indulging along level
Be extended to direction or reclaim, with change its receiving volume thus with tested pavement structure two-layer equation test specimen
Superstructure adapts；Down cut box 21 is configured to: is vertically extended or reclaims, along level
Horizontal direction is extended or reclaims, and/or is extended along horizontal longitudinal direction or reclaims, to change its appearance
Receive volume thus adapt with the understructure of tested pavement structure two-layer equation test specimen.
In another embodiment of the presently claimed invention, this interlayer direct shear test device also includes that shearing is put down
Platform 10 and down cut platform 20.Upper shearing platform 10 has platform part and is positioned at the upper cover part above platform part,
Be formed with accommodation space 12 on upper shearing platform 10, to place upper shear box 11, the lower surface of platform part with
The upper strata component of tested pavement structure two-layer equation test specimen and the interface layer of lower floor's component are in the same plane,
It is to say, the lower surface of the platform part of upper shearing platform 10 is positioned at same with the plane of the opening of upper shear box 11
In one plane.Down cut platform 20 has platform part and is positioned at the base portion below platform part, and down cut is put down
Accommodation space 22 it is formed with on platform 20, to place down cut box 21, the platform part of down cut platform 20
Upper surface and the tested upper strata component of pavement structure two-layer equation test specimen and the interface layer of lower floor's component are positioned at same
In one plane, i.e. the upper surface of the platform part of down cut platform 20 is positioned at the plane of the opening of down cut box 21
On same plane.During experiment, upper shearing platform 10 and down cut platform 20 are in the effect of horizontal charger
The lower the most micro-shifting of generation such that it is able to make upper strata component and lower floor's component of tested pavement structure two-layer equation test specimen
Interface layer bear predetermined shearing force.
In embodiments of the present invention, upper shear box 11 and down cut box 21 are and have four sidewalls and one
The quadrangle box of diapire.Each sidewall of upper shear box 11 and/or each sidewall of down cut box 21 all include
One expansion plate assembly, expansion plate assembly includes: outer sleeve-board, is formed with receiving cavity in it；And inner sleeve plate,
It is configured in outer sleeve-board, stretch out to extend the area of respective side walls or the outer sleeve-board of indentation is corresponding to reduce
The area of sidewall.In this inventive embodiments, when each inner sleeve plate is stretched in the horizontal direction in corresponding sleeve-board
Go out or during the outer sleeve-board of indentation, be suitable for the change of the horizontal size of tested pavement structure two-layer equation test specimen,
And do not adapt to the change of the height dimension of tested pavement structure two-layer equation test specimen.When each inner sleeve plate is along vertically
Direction during extended or retracted corresponding outer sleeve-board, is suitable for the examination of tested pavement structure two-layer equation in corresponding sleeve-board
The change of the height dimension of part, and do not adapt to the change of the horizontal size of tested pavement structure two-layer equation test specimen
Change.
In a preferred embodiment of the invention, each sidewall of upper shear box 11 and/or down cut box
Each sidewall of 21 all includes at least two expansion plate assembly.Each expansion plate assembly comprises the steps that outer sleeve-board,
Receiving cavity it is formed with in it；And inner sleeve plate, it is configured to stretch out to extend respective side walls in outer sleeve-board
Area or the outer sleeve-board of indentation to reduce the area of respective side walls.Each at least two expansion plate assembly stretches
The flag of contracting board component is configured to along being perpendicular to the direction of telescopic direction of inner sleeve plate stretching of being adjacent
Move on one side of the flag of contracting board component, with extension or the area of reduction respective side walls.
Fig. 2 is the down cut platform in interlayer direct shear test device in accordance with another embodiment of the present invention
Schematic plan；Fig. 3 is in accordance with another embodiment of the present invention in interlayer direct shear test device
The schematic partial structurtes front view of down cut platform.As shown in Figures 2 and 3, upper shear box is each
Each sidewall of sidewall and/or down cut box all includes two expansion plate assemblies.Each inner sleeve plate is in the horizontal direction
Extended or retracted corresponding outer sleeve-board in corresponding sleeve-board；Each inner sleeve plate moves to behind precalculated position with corresponding
Outer sleeve-board is fixing to be connected.Such as, each inner sleeve plate and outside plate put the spiral shell being both provided with arranging in the horizontal direction
Nail, when the screw hole pair that inner sleeve plate moves to the screw hole on precalculated position and inner sleeve plate and outside plate puts
Should, screw in screw and make inner sleeve plate and the fixing connection of outer sleeve-board.For the ease of each inner sleeve plate in the horizontal direction from
Extended or retracted corresponding outer sleeve-board in corresponding outer sleeve-board, this interlayer direct shear test device also includes multiple water
Horizontal drawing bar 30, each girt 30 is configured to drive each sidewall of shear box and/or down cut box
Each sidewall moves in the horizontal direction, and each girt 30 is perpendicular to respective side walls and its one end is fixed on
Respective side walls.
The flag of an expansion plate assembly in two expansion plate assemblies is outside another expansion plate assembly
Vertically move on one side of cage plate, and move to behind precalculated position with another expansion plate assembly
Fixing connection.Such as, each inner sleeve plate and outside plate put the screw hole being both provided with vertically arranging,
When flag edge on a side of the flag of another expansion plate assembly of an expansion plate assembly is perpendicular
Nogata is corresponding to the screw hole moved on precalculated position and two expansion plate assemblies, screws in screw and makes two to stretch
Contracting board component is fixing to be connected.Screw-nut body it is additionally provided with, configuration in the base portion of down cut platform 20
Become and drive the diapire of down cut box 21 vertically to move and reach pre-determined bit at the diapire of down cut box 21
Postpone and keep it in this position.During it is to say, adjust the height of down cut box 21, due to down cut
The invariant position of the plane of the opening of box, then need the diapire making down cut box 21 to move down, and uses leading screw
Nut body can make the diapire of down cut box conveniently move down, and can facilitate after reaching precalculated position
Keep it in this position.Screw-nut body can include leading screw 41 and adjusting nut 42, adjusting nut
During 42 rotation, leading screw 41 is promoted to move downward or upward, so that the diapire of down cut box 21 is along vertically side
To movement.
Fig. 4 is the diagrammatic top of interlayer direct shear test device in accordance with another embodiment of the present invention
Figure.In embodiments of the present invention, horizontal charger can include laterally loading passage 51, horizontal loading disc
52, pressure conduction post 53 and hydraulic pump (not shown).Laterally load one end of passage 51 directly or
Indirectly fix with upper shear box 11 and be connected, such as, can be directly fixed on shearing platform 10.Laterally
Loading disc 52 is connected to down cut platform 20 by pull rope 54 or trussed shore.The one of pressure conduction post 53
End inserts and laterally loads in passage 51, the vertical contacts side surfaces of the other end and horizontal loading disc 52 against.Liquid
Press pump is configured to delivery hydraulic pressure oil in laterally loading passage 51.Laterally charger is to tested pavement structure
The upper strata component of two-layer equation test specimen and the interface layer of lower floor's component apply to pass through hydraulic pressure during predetermined shearing force
Pump is delivery hydraulic pressure oil in laterally loading passage, and hydraulic oil drives pressure conductive post 53 to move, due to pressure
Conductive post 53 is resisted against on horizontal loading disc 51, then cause laterally loading passage 51 and reversely move, to upper
Shear platform 10 apply horizontal thrust so that the upper strata component of tested pavement structure two-layer equation test specimen and under
The interface layer of layer component bears predetermined shearing force.During experiment, refer to hydraulic pressure reading dial,
Constantly adjust hydraulic pump, constantly to change the size of horizontal thrust.Alternatively real in some of the present invention
Executing in example, horizontal charger applies horizontal pull to upper shearing platform, so that tested pavement structure is double-deck
The upper strata component of formula test specimen and the interface layer of lower floor's component bear predetermined shearing force.This horizontal charger
Comprising the steps that and laterally load passage 51, its one end is fixing with down cut box 20 to be connected；Laterally loading disc 52,
It is connected with upper shear box 11 directly or indirectly by pull rope 54 or trussed shore；Pressure conduction post 53, its
One end is inserted and is laterally loaded in passage 51, the vertical contacts side surfaces of its other end and horizontal loading disc 52 against；
Hydraulic pump, is configured to delivery hydraulic pressure oil in laterally loading passage.
Fig. 5 is that the schematically local of interlayer direct shear test device in accordance with another embodiment of the present invention is main
View.Vertical loading device includes vertically loading passage 61, vertical loading disc 62, pressure conduction post 63 and
Hydraulic pump (not shown).The vertical passage 61 that loads is through the vertical passageway in upper cover part, and one
Hold the diapire with upper shear box 11 to fix to be connected.Vertical loading disc 62 is arranged on vertical loading passage 61
Top, is connected with down cut box 21 directly or indirectly by pull rope 64 or trussed shore, specifically draws
One end of rope 64 or trussed shore can be directly fixed on down cut platform 20.One end of pressure conduction post 63
Inserting vertical loading in passage 61, its other end contacts against with the basal surface of vertical loading disc 62.Hydraulic pressure
Pump is configured to delivery hydraulic pressure oil in vertical loading passage.
The embodiment of the present invention additionally provides a kind of interlayer direct shear test in any of the above-described embodiment
The test method of device, including:
Obtain tested pavement structure two-layer equation test specimen by the cutting mode of non-drill core, obtained by cutting mode
Test specimen can prevent from, due to subjective anthropic factor or the odjective cause of equipment, core sample produces disturbance so that interlayer
Interface is destroyed；
Lower floor's component of tested pavement structure two-layer equation test specimen is put into the receiving space of down cut box, and adjusts
The receiving space of whole down cut box so that the sidewall of lower floor's component of tested pavement structure two-layer equation test specimen with under
The sidewall contact accommodating space of shear box against, and make the upper strata structure of tested pavement structure two-layer equation test specimen
The interface layer of part and lower floor's component is in the same plane with the open end of down cut box；
Upper shear box cover is buckled in down cut box, and the receiving space of the upper shear box of adjustment, so that tested road surface
The sidewall contact accommodating space of the sidewall of lower floor's component of structure two-layer equation test specimen and upper shear box against, and
Make the upper strata component of tested pavement structure two-layer equation test specimen and the interface layer of lower floor's component and upper shear box
Open end in the same plane；
Predetermined vertical load is applied to tested pavement structure two-layer equation test specimen；
Apply predetermined to the upper strata component of tested pavement structure two-layer equation test specimen and the interface layer of lower floor's component
Shearing force, when applying predetermined shearing force, with reference to hydraulic pressure reading dial, constantly adjust hydraulic pump, with
Constantly change the size of horizontal thrust.
Specifically, this test method also includes: the receiving space of first successive step down cut box, with tested road surface
The receiving space of down cut box put into by lower floor's component of structure two-layer equation test specimen such that it is able under again adjusting
The receiving space of shear box, so that the sidewall of lower floor's component of tested pavement structure two-layer equation test specimen and down cut
Box accommodate space sidewall contact against, and make tested pavement structure two-layer equation test specimen upper strata component and
The interface layer of lower floor's component is in the same plane with the open end of down cut box.
This test method may also include that the receiving space of shear box on first successive step, and above shear box cover is buckled in
Down cut box such that it is able to again adjust the receiving space of upper shear box, so that tested pavement structure two-layer equation
The sidewall contact accommodating space of the sidewall of lower floor's component of test specimen and upper shear box against, and make tested road
The open end of the upper strata component of face structure two-layer equation test specimen and the interface layer of lower floor's component and upper shear box
In the same plane.
So far, although those skilled in the art will appreciate that and the most detailed illustrate and describing the present invention's
Multiple exemplary embodiments, but, without departing from the spirit and scope of the present invention, still can be according to this
Disclosure of invention directly determines or derives other variations or modifications of many meeting the principle of the invention.Cause
This, the scope of the present invention is it is understood that and regard as covering other variations or modifications all these.
Claims (9)
1. the interlayer direct shear test device for pavement structure two-layer equation test specimen, it is characterised in that
Including:
Upper shear box, it is opening down, is configured to: is vertically extended or reclaims, horizontal along level
It is extended to direction or reclaims, and/or be extended along horizontal longitudinal direction or reclaim, to change its receiving
Volume thus adapt with the superstructure of tested pavement structure two-layer equation test specimen；
Down cut box, it is opening up, is configured to: is vertically extended or reclaims, horizontal along level
It is extended to direction or reclaims, and/or be extended along horizontal longitudinal direction or reclaim, to change its receiving
Volume thus adapt with the understructure of tested pavement structure two-layer equation test specimen；
Vertical loading device, is configured to apply to make a reservation for tested pavement structure two-layer equation test specimen directly or indirectly
Vertical load；With
Laterally charger, is configured to directly or indirectly to the upper strata structure of tested pavement structure two-layer equation test specimen
The interface layer of part and lower floor's component applies predetermined shearing force；And
Each sidewall of described upper shear box and/or each sidewall of described down cut box all include at least two
Expansion plate assembly, each described expansion plate assembly includes:
Outer sleeve-board, is formed with receiving cavity in it；With
Inner sleeve plate, is configured to stretch out to extend the area of respective side walls or indentation institute in described outer sleeve-board
State outer sleeve-board to reduce the area of respective side walls；
The flag of each expansion plate assembly in expansion plate assembly described at least two is configured to along being perpendicular to
The direction of the telescopic direction of inner sleeve plate is moved on a side of the flag of the expansion plate assembly being adjacent
Dynamic, with extension or the area of reduction respective side walls.
Interlayer direct shear test device the most according to claim 1, it is characterised in that also include:
Upper shearing platform, it has platform part and is positioned at the upper cover part above described platform part, described upper shearing
Accommodation space it is formed with on platform, to place described upper shear box, the lower surface of described platform part and tested road
The upper strata component of face structure two-layer equation test specimen and the interface layer of lower floor's component are in the same plane.
Interlayer direct shear test device the most according to claim 2, it is characterised in that
Described vertical loading device includes:
Vertically loading passage, it is through the vertical passageway in described upper cover part, and its one end and described upper shearing
The diapire of box is fixing to be connected；
Vertical loading disc, is arranged on the top of described vertical loading passage, direct by pull rope or trussed shore
Or be indirectly connected with described down cut box；
Pressure conduction post, its one end is inserted in described vertical loading passage, its other end and described vertical loading
The basal surface of dish contacts against；
Hydraulic pump, is configured to delivery hydraulic pressure oil in described vertical loading passage.
Interlayer direct shear test device the most according to claim 1, it is characterised in that also include:
Down cut platform, it has platform part and is positioned at the base portion below described platform part, described down cut
Accommodation space it is formed with on platform, to place described down cut box, the upper surface of described platform part and tested road
The upper strata component of face structure two-layer equation test specimen and the interface layer of lower floor's component are in the same plane.
Interlayer direct shear test device the most according to claim 4, it is characterised in that cut under described
Cut flat with and in the base portion of platform, be additionally provided with screw-nut body, be configured to drive the diapire edge of described down cut box
Vertical direction moves and keeps it in this position after the diapire of described down cut box reaches precalculated position.
Interlayer direct shear test device the most according to claim 4, it is characterised in that
Described horizontal charger includes:
Laterally loading passage, its one end is fixing with described upper shear box directly or indirectly to be connected；
Laterally loading disc, is connected to described down cut platform by pull rope or trussed shore；
Pressure conduction post, its one end is inserted in described horizontal loading passage, its other end and described horizontal loading
The vertical contacts side surfaces of dish against；
Hydraulic pump, is configured to delivery hydraulic pressure oil in described horizontal loading passage.
Interlayer direct shear test device the most according to claim 1, it is characterised in that
Each sidewall of described upper shear box and/or each sidewall of described down cut box all include that two are stretched
Board component；
Each described inner sleeve plate extended or retracted corresponding outer sleeve-board in corresponding sleeve-board in the horizontal direction, each
Described inner sleeve plate is fixing with corresponding outer sleeve-board after moving to precalculated position to be connected；
The flag of an expansion plate assembly in two described expansion plate assemblies is at another expansion plate assembly
Flag a side on vertically move, and move to behind precalculated position with another expansion plate
Assembly is fixing to be connected.
Interlayer direct shear test device the most according to claim 7, it is characterised in that also include:
Multiple girts, each described girt be configured to drive described upper shear box each sidewall and
/ or each sidewall of described down cut box move in the horizontal direction, each described girt is perpendicular to corresponding side
Respective side walls is fixed in wall and its one end.
9. for a test method for the interlayer direct shear test device described in claim 1, its feature
It is, including:
Described tested pavement structure two-layer equation test specimen is obtained by the cutting mode of non-drill core；
The receiving that lower floor's component of described tested pavement structure two-layer equation test specimen is put into described down cut box is empty
In, and adjust the receiving space of described down cut box, so that described tested pavement structure two-layer equation test specimen
The sidewall contact accommodating space of the sidewall of lower floor's component and described down cut box against, and make described tested
The upper strata component of pavement structure two-layer equation test specimen and the interface layer of lower floor's component and opening of described down cut box
Mouth end face is in the same plane；
Described upper shear box cover is buckled in described down cut box, and adjusts the receiving space of described upper shear box,
So that the sidewall of lower floor's component of described tested pavement structure two-layer equation test specimen and the receiving of described upper shear box
The sidewall contact in space against, and make upper strata component and the lower floor of described tested pavement structure two-layer equation test specimen
The interface layer of component is in the same plane with the open end of described upper shear box；
Predetermined vertical load is applied to tested pavement structure two-layer equation test specimen；
Apply predetermined to the upper strata component of tested pavement structure two-layer equation test specimen and the interface layer of lower floor's component
Shearing force.
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| CN104819903A (en) * | 2015-01-20 | 2015-08-05 | 中山大学 | Soil direct shear rheometer |
| CN106769411B (en) * | 2016-12-23 | 2023-08-01 | 同济大学 | Interlayer shear test device for pavement structure |
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| CN108593459A (en) * | 2017-12-15 | 2018-09-28 | 浙江科技学院 | Based on the more dimensional structure face shear boxs of limited block combined type |
| CN108088755A (en) * | 2017-12-15 | 2018-05-29 | 浙江科技学院 | Suitable for the stepless adjustable shear box of height and arbitrary plane size rule shape structural plane such as having |
| CN107991172A (en) * | 2017-12-15 | 2018-05-04 | 浙江科技学院 | One kind is based on the more dimensional structure face shear box assemble methods of limited block combined type |
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| CN108007799A (en) * | 2017-12-15 | 2018-05-08 | 浙江科技学院 | Suitable for the stepless adjustable shear box for waiting height and arbitrary plane size square structure face |
| CN108562500A (en) * | 2017-12-15 | 2018-09-21 | 浙江科技学院 | It is a kind of to be suitable for the stepless adjustable shear box assemble method for waiting height and arbitrary plane size square structure face |
| CN108267359B (en) * | 2017-12-15 | 2020-08-21 | 浙江科技学院 | Horizontal stepless orthogonal limiting shear box assembling method suitable for multi-size structural surface |
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| JP3068763B2 (en) * | 1995-02-20 | 2000-07-24 | 元 松岡 | Single shear tester |
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