CN104697865B - Asphalt concrete pavement material shear behavior research equipment - Google Patents
Asphalt concrete pavement material shear behavior research equipment Download PDFInfo
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- CN104697865B CN104697865B CN201510139912.1A CN201510139912A CN104697865B CN 104697865 B CN104697865 B CN 104697865B CN 201510139912 A CN201510139912 A CN 201510139912A CN 104697865 B CN104697865 B CN 104697865B
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Abstract
A kind of asphalt concrete pavement material shear behavior research equipment, including plant bottom case, fixing plummer, movable plummer, hydraulic pump, vertical contraction pole, displacement transducer, vertical loading component and temperature-controlled member；Fixing plummer and movable plummer are arranged on plant bottom case；Hydraulic pump and displacement transducer are arranged between plant bottom case and movable plummer；Asphalt concrete material includes the first structure sheaf, the second structure sheaf and surface layer；First structure sheaf and the second structure sheaf are separately positioned on fixing plummer and movable plummer；First structure sheaf and the second structure sheaf have gap in the horizontal direction；Surface layer is layered on the first structure sheaf and the second structure sheaf；Vertical loading component is arranged on surface layer；Temperature-controlled member is arranged in the second structure sheaf.The present invention can more truly simulate asphalt concrete pavement force-bearing situation under load action, can evaluate material shear behavior and elastic recovery properties, it is ensured that the design of asphalt concrete pavement surface is more reasonable.
Description
Technical field
The invention belongs to field of road, relate to a kind of road engineering road surface pavement performance research equipment, specifically
Relate to a kind of asphalt concrete pavement material shear behavior research equipment.
Background technology
Asphalt concrete pavement has that initial stage cost is low, noise is low, surface evenness is good, road-ability is good
Advantage, therefore worldwide should have a lot of.The high-grade highway of China more than 95% all uses bituminous paving,
Cement concrete pavement in low-grade highway is also progressively transforming bituminous paving as, to increase road-ability also
Recover road surface pavement performance.And old cement concrete road is often associated with plat-bottom escape, disease such as disconnected plate and crack etc., overlay
After bituminous concrete at crack, be highly prone to excessive vertical shear stress and destroy, i.e. crack reflection
Disease.
Prior art mainly solution crack reflection problem in terms of improving pavement structure and improving the strength of materials two:
Improve pavement structure mainly increase overlay thickness or relax at cement layer and Colophonium interlayer increase functional layer
Road surface shear stress, this not only adds difficulty of construction, more improves economic cost；Improve the strength of materials main
Including tension and two aspects of shearing strength of raising material, tension and the shearing strength of material are ground by prior art
Studying carefully the most of common occurrence, shearing strength focuses primarily upon the performance study of interlayer, and the structural shearing resistance to material is strong
Degree does not has relevant research, and bituminous concrete Shear Analysis in pavement structure more can exist by close simulation material
Force-bearing situation under load action, the shearing strength of existing scholar's testimonial material is also to weigh material plasticity deformation
Major influence factors.Existing material shearing strength research method is mainly triaxial shear test, uniaxial penetration examination
Test, rotational shear test etc., all there is no to be analyzed from structural angle the shear behavior of material, more there is no phase
The research equipment closed.
Summary of the invention
The vacancy evaluated for the structural shear behavior of existing Asphalt Concrete Overlay, it is an object of the invention to
A kind of Asphalt Concrete Overlay of simulation more really force-bearing situation under load action is provided, evaluation can be taken into account
The shear behavior of material and elastic recovery properties and guarantee the design more adduction of overlay on concrete pavement
The asphalt concrete pavement material shear behavior research equipment of reason.
The technical solution adopted in the present invention is as follows:
A kind of asphalt concrete pavement material shear behavior research equipment, it is characterised in that: described bituminous concrete
Surface material shear behavior research equipment includes plant bottom case, fixing plummer, movable plummer, vertically shrinks
Bar, hydraulic pump, displacement transducer, vertical loading component and temperature-controlled member；Described fixing plummer is fixing to be set
Put on plant bottom case；Described movable plummer is arranged on plant bottom case by vertical contraction pole；Described hydraulic pressure
Pump and displacement transducer are arranged between plant bottom case and movable plummer；Described hydraulic pump drive activity is held
Microscope carrier carries out vertically movable；The upper surface of the upper surface of described fixing plummer and movable plummer is in naturalness
Under be in same level；Asphalt concrete pavement material to be tested includes structure sheaf and surface layer；Structure sheaf bag
Include the first structure sheaf and the second structure sheaf；First structure sheaf is arranged on the upper surface of fixing plummer；Second knot
Structure layer is arranged on the upper surface of movable plummer；First structure sheaf and the second structure sheaf are provided with in the horizontal direction
Gap；First structure sheaf and the second structure sheaf are spliced to form structure sheaf in the horizontal plane；Topping laying is in structure
The upper surface of layer；The upper surface that described vertical loading component is arranged on surface layer is placed in just going up of the first structure sheaf
Side；Described temperature-controlled member is arranged in the second structure sheaf.
As preferably, the gap between the first structure sheaf of the present invention and the second structure sheaf is adjustable
's.
As preferably, asphalt concrete pavement material shear behavior research equipment of the present invention also includes setting
Put the interstitial site adjusting apparatus on fixing plummer；Described interstitial site adjusting apparatus include bolt,
Floating holder and moving track；Described moving track is arranged on the upper surface of fixing plummer, described movable folder
Tool is arranged on moving track and can move horizontally on moving track；Described first structure sheaf is arranged on work
On dynamic fixture；Described bolt drives the first structure sheaf to move in the horizontal plane by floating holder.
As preferably, moving track of the present invention is screw thread, leading screw or cutting.
As preferably, vertical loading component of the present invention includes load dish and is arranged on load dish
Counterweight；The upper surface that described load dish is arranged on surface layer is placed in the surface of the first structure sheaf.
As preferably, the end face of load dish of the present invention and the first structure sheaf is generally flush with.
As preferably, temperature-controlled member of the present invention includes that power supply, temperature controller, thermocouple and temperature are visited
Head；Described temperature probe is embedded in the second structure sheaf；Described thermocouple is placed in the second structure sheaf and movable carrying
Between platform upper surface；Described temperature probe and thermocouple are connected with temperature controller respectively；Described temperature controller and power supply
It is connected.
As preferably, vertical contraction pole of the present invention includes first fixing bar, second fixing bar and pressure
Contracting spring；Described first to fix bar be tubular；Described second fixes bar stretches into first and fixes inside bar；Described
Two fix bar and first fixes and is provided with compression spring between bar；Described first fixes bar and movable plummer following table
Face is connected；Described second fixes bar is connected with plant bottom case.
Compared with prior art, it is an advantage of the current invention that:
The invention provides a kind of asphalt concrete pavement material shear behavior research equipment, mainly carried by load
Parts, displacement loading component and temperature-controlled member are constituted.Load load bearing component includes that fixing plummer, activity are held
Microscope carrier and vertical contraction pole；Displacement loading component includes hydraulic pump, displacement transducer, load dish, counterweight, work
Dynamic fixture and bolt；Temperature-controlled member includes temperature probe, thermocouple and temperature controller.The half of structure sheaf is glued
Being attached on floating holder, second half pastes on movable plummer, and surface layer is taped against on structure sheaf, load dish execute
Pressure so that it is side is fixed.Hydraulic pump makes wherein structure sheaf half do vertical displacement, and second half holding is static,
Mechanics feature is analyzed, here it is surface layer is tested the shearing of structure at gap location by shear action, displacement transducer
Deflection.The repeat function of hydraulic pump, makes what surface layer repeated to receive shear action, from failure by shear number of times, position
Shifting amount evaluates the anti-shear performance of surface material.The present invention fully simulate asphalt concrete material bear cut should
The working condition of power, from the shear behavior of structural shearing resistance angle measurement asphalt concrete material, and can be able to hold concurrently
Turn round and look at the recoverable force ability evaluating bituminous concrete.Different temperatures, different load action, different distortion can be studied
Shear behavior under operating mode and anti-fatigue performance.Old cement concrete overlay and composite pavement are set
Meter, construction all have direct directive significance.
Accompanying drawing explanation
Fig. 1 is the structural representation of asphalt concrete pavement material shear behavior research equipment provided by the present invention
Figure；
Fig. 2 is the principle schematic of temperature-controlled member of the present invention；
Fig. 3 is the structural representation of vertical contraction pole of the present invention；
Wherein, entitled corresponding to the reference in accompanying drawing:
1-fixes plummer；2-activity plummer；The vertical contraction pole of 3-；4-hydraulic pump；5-displacement transducer；
6-load dish；7-counterweight；8-floating holder；9-bolt；10-temperature probe；11-thermocouple；12-
Power supply；13-temperature controller；14-structure sheaf；15-surface layer；16-first fixes bar；17-second fixes bar；18-
Compression spring.
Detailed description of the invention
With detailed description of the invention, technical scheme provided by the present invention is described in detail below in conjunction with the accompanying drawings:
See Fig. 1 and Fig. 2, the invention provides a kind of asphalt concrete pavement material shear behavior research and set
Standby, including plant bottom case, load load bearing component, displacement loading component and temperature-controlled member.Wherein, load carrying
Parts include fixing plummer 1, movable plummer 2 and vertical contraction pole 3；Displacement loading component include hydraulic pump 4,
Displacement transducer 5, load dish 6, counterweight 7, floating holder 8 and bolt 9；Temperature-controlled member includes that temperature is visited
10, thermocouple 11 and temperature controller 13.
Fixing plummer 1 is fixedly installed on plant bottom case；Movable plummer 2 is arranged on by vertical contraction pole 3
On plant bottom case；Hydraulic pump 4 and displacement transducer 5 are arranged between plant bottom case and movable plummer 2；
Hydraulic pump 4 driving activity plummer 2 carries out vertically movable；The upper surface of fixing plummer 1 and movable plummer 2
Upper surface be in same level in its natural state；Asphalt concrete pavement material to be tested includes structure sheaf
14 and surface layer 15；Structure sheaf 14 includes the first structure sheaf and the second structure sheaf；First structure sheaf is arranged on solid
Determine the upper surface of plummer 1；Second structure sheaf is arranged on the upper surface of movable plummer 2；First structure sheaf and
Two structure sheafs are provided with gap in the horizontal direction；First structure sheaf and the second structure sheaf splice in the horizontal plane
Form structure sheaf；Surface layer 15 is laid on the upper surface of structure sheaf 14；Vertical loading component is arranged on the upper table of surface layer
Face is placed in the surface of the first structure sheaf；Temperature-controlled member is arranged in the second structure sheaf.
Load load bearing component: fixing plummer 1 and movable plummer 2 constitute bearing system, and vertical contraction pole 3 is protected
The stability that card activity plummer 2 is vertically movable.
Displacement loading component: displacement transducer 5 controls hydraulic pump 4 load movable plummer 2, on load dish 6 not
The shear action to test specimen, bolt 9 is provided to promote floating holder 8 to control with the counterweight 7 of quantity with hydraulic pump 4
Fracture width.
Temperature-controlled member: temperature controller 13 controls power supply 12 by temperature probe 10 and is energized to thermocouple 11.Temperature probe
It is to be deployed in structure sheaf during structure sheaf molding；Thermocouple is laid in the floating holder below structure sheaf and activity is held
The top layer of microscope carrier.
Structure sheaf 14 includes independent two halves (the first structure sheaf and the second structure sheaf), wherein half (first
Structure sheaf) paste on floating holder 8, second half (second structure sheaf) pastes on movable plummer 2, face
Layer 15 is taped against on structure sheaf 14, load dish 6 press so that it is side (part on the first structure sheaf) fixes.
Load dish 6 is used to hold counterweight 7, and load dish 6 is placed directly on the top of surface layer 15, on the right side of it and structure
The left side alignment in layer 14 gap, with floating holder 8 without being connected.Bolt 9 is directly connected to floating holder 8,
Bolt 9 can promote, pull floating holder 8 to move, and makes the gap in the middle of structure sheaf 14 be decreased or increased.
Floating holder 8 is connected with fixing plummer 1 by having the cutting of certain intervals, i.e. by cutting one by one
The fixed value in the gap in the middle of guarantee structure sheaf 14, it is ensured that floating holder 8 is at the shadow of movable plummer 2 vertical displacement
Under sound, there is not lateral displacement.
Displacement transducer 5 controls hydraulic pump 4 and loads movable plummer 2, the counterweight 7 of varying number on load dish 6
The shear action to test specimen, bolt 9 is provided to promote floating holder 8 control critical eigenvalue width with hydraulic pump 4.
Fixing plummer 1 is provided separately in the middle of movable plummer 2, and gap therein is according to workmanship precision setting
It is 3～5mm, it is ensured that movable plummer 2, during vertical displacement, is mutually dawdled due to centre-of gravity shift, impact
Measuring accuracy.
On fixing plummer 1 structure fixing-stable platform or on other fixing objects, it is ensured that test specimen in test process
Left side part keep stationary state.Movable plummer 2 is provided load by hydraulic pump 4 so that it is make vertical displacement,
And vertically contraction pole 3 is to ensure that live load platform does not occur centre-of gravity shift to arrange in displacement process, simply exist
Laterally carry out retraining live load platform.Seeing Fig. 3, vertical contraction pole of the present invention includes that first fixes
Bar 16, second fix bar 17 and compression spring 18；First fixes bar 16 in tubular；Second fixes bar 17 stretches into
First fixes bar 16 inside；Second fixes bar 17 and first fixes and is provided with compression spring 18 between bar；First is solid
Fixed pole 16 is connected with movable plummer 2 lower surface；Second fixes bar 17 is connected with plant bottom case.
The principle of the present invention is: the half of structure sheaf 14 pastes on floating holder 8, and second half pastes activity
On plummer 2, on surface material paving 15 to structure sheaf 14, load dish 6 press so that it is side is fixed.Hydraulic pressure
Pump makes wherein structure sheaf half do vertical displacement, and second half holding is static, mechanics feature analysis, here it is face
Layer 15 is tested the shearing strain quantity of structure at gap location by shear action, displacement transducer 5.The weight of hydraulic pump 4
Multiple effect, makes what surface layer 15 repeated to receive shear action, and from failure by shear number of times, displacement evaluates surface layer material
The anti-shear performance of material.The present invention simulates Asphalt Concrete Overlay stress under load action more really
Situation, can take into account shear behavior and the elastic recovery properties evaluating material, it is ensured that overlay on concrete pavement
Design more reasonable.
Above-mentioned detailed description of the invention is a preferred embodiment of the present invention, is not for limiting the present invention's
Implement and right, all equivalences made according to the content described in the present patent application scope of patent protection
Change and modification, in the range of all should being included in present patent application.
Claims (8)
1. an asphalt concrete pavement material shear behavior research equipment, it is characterised in that: described asphalt concrete pavement material shear behavior research equipment includes plant bottom case, fixing plummer, movable plummer, vertical contraction pole, hydraulic pump, displacement transducer, vertical loading component and temperature-controlled member；Described fixing plummer is fixedly installed on plant bottom case；Described movable plummer is arranged on plant bottom case by vertical contraction pole；Described hydraulic pump and displacement transducer are arranged between plant bottom case and movable plummer；Described hydraulic pump drive activity plummer carries out vertically movable；The upper surface of described fixing plummer is in same level in its natural state with the upper surface of movable plummer；Asphalt concrete pavement material to be tested includes structure sheaf and surface layer；Structure sheaf includes the first structure sheaf and the second structure sheaf；First structure sheaf is arranged on the upper surface of fixing plummer；Second structure sheaf is arranged on the upper surface of movable plummer；First structure sheaf and the second structure sheaf are provided with gap in the horizontal direction；First structure sheaf and the second structure sheaf are spliced to form structure sheaf in the horizontal plane；Topping laying is at the upper surface of structure sheaf；The upper surface that described vertical loading component is arranged on surface layer is placed in the surface of the first structure sheaf；Described temperature-controlled member is arranged in the second structure sheaf.
Asphalt concrete pavement material shear behavior research equipment the most according to claim 1, it is characterised in that: the gap between described first structure sheaf and the second structure sheaf is adjustable.
Asphalt concrete pavement material shear behavior research equipment the most according to claim 2, it is characterised in that: described asphalt concrete pavement material shear behavior research equipment also includes the interstitial site adjusting apparatus being arranged on fixing plummer；Described interstitial site adjusting apparatus includes bolt, floating holder and moving track；Described moving track is arranged on the upper surface of fixing plummer, and described floating holder is arranged on moving track and can move horizontally on moving track；Described first structure sheaf is arranged on floating holder；Described bolt drives the first structure sheaf to move in the horizontal plane by floating holder.
Asphalt concrete pavement material shear behavior research equipment the most according to claim 3, it is characterised in that: described moving track is screw thread, leading screw or cutting.
5. according to the asphalt concrete pavement material shear behavior research equipment described in claim 1 or 2 or 3 or 4, it is characterised in that: described vertical loading component includes load dish and is arranged on the counterweight on load dish；The upper surface that described load dish is arranged on surface layer is placed in the surface of the first structure sheaf.
Asphalt concrete pavement material shear behavior research equipment the most according to claim 5, it is characterised in that: the end face of described load dish and the first structure sheaf is generally flush with.
Asphalt concrete pavement material shear behavior research equipment the most according to claim 6, it is characterised in that: described temperature-controlled member includes power supply, temperature controller, thermocouple and temperature probe；Described temperature probe is embedded in the second structure sheaf；Described thermocouple is placed between the second structure sheaf and movable plummer upper surface；Described temperature probe and thermocouple are connected with temperature controller respectively；Described temperature controller is connected with power supply.
Asphalt concrete pavement material shear behavior research equipment the most according to claim 7, it is characterised in that: described vertical contraction pole includes first fixing bar, second fixing bar and compression spring；Described first to fix bar be tubular；Described second fixes bar stretches into first and fixes inside bar；Described second fixes bar and first fixes and is provided with compression spring between bar；Described first fixes bar is connected with movable plummer lower surface；Described second fixes bar is connected with plant bottom case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510139912.1A CN104697865B (en) | 2015-03-27 | 2015-03-27 | Asphalt concrete pavement material shear behavior research equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510139912.1A CN104697865B (en) | 2015-03-27 | 2015-03-27 | Asphalt concrete pavement material shear behavior research equipment |
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| Publication Number | Publication Date |
|---|---|
| CN104697865A CN104697865A (en) | 2015-06-10 |
| CN104697865B true CN104697865B (en) | 2016-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510139912.1A Active CN104697865B (en) | 2015-03-27 | 2015-03-27 | Asphalt concrete pavement material shear behavior research equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105043870B (en) * | 2015-07-08 | 2018-01-02 | 中国石油天然气股份有限公司 | A kind of storage tank preserving and sealing detection means |
| CN108956334A (en) * | 2018-08-14 | 2018-12-07 | 长沙理工大学 | The test device of paving mix and its structure Interlaminar shear strengths |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2723087A1 (en) * | 1977-05-21 | 1978-11-23 | Eberhard Dipl Ing Wernick | Shear strength measurement for granular and cohesive materials - involves sample container whose two halves can move only in shearing direction |
| CN101464239A (en) * | 2009-01-09 | 2009-06-24 | 长安大学 | Interlayer shear strength detecting instrument for asphalt pavement |
| CN102426143A (en) * | 2011-09-22 | 2012-04-25 | 中国建筑科学研究院 | Method and device for detecting compressive strength of concrete by shearing resistance method |
| CN203595640U (en) * | 2013-11-28 | 2014-05-14 | 长安大学 | Device for testing interlaminar shear strength of pavement |
| CN204575462U (en) * | 2015-03-27 | 2015-08-19 | 山西省交通科学研究院 | Asphalt concrete pavement material shear behavior research equipment |
-
2015
- 2015-03-27 CN CN201510139912.1A patent/CN104697865B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2723087A1 (en) * | 1977-05-21 | 1978-11-23 | Eberhard Dipl Ing Wernick | Shear strength measurement for granular and cohesive materials - involves sample container whose two halves can move only in shearing direction |
| CN101464239A (en) * | 2009-01-09 | 2009-06-24 | 长安大学 | Interlayer shear strength detecting instrument for asphalt pavement |
| CN102426143A (en) * | 2011-09-22 | 2012-04-25 | 中国建筑科学研究院 | Method and device for detecting compressive strength of concrete by shearing resistance method |
| CN203595640U (en) * | 2013-11-28 | 2014-05-14 | 长安大学 | Device for testing interlaminar shear strength of pavement |
| CN204575462U (en) * | 2015-03-27 | 2015-08-19 | 山西省交通科学研究院 | Asphalt concrete pavement material shear behavior research equipment |
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| CN104697865A (en) | 2015-06-10 |
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