CN104697865A - Bituminous concrete surface material shearing-resisting performance research device - Google Patents
Bituminous concrete surface material shearing-resisting performance research device Download PDFInfo
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- CN104697865A CN104697865A CN201510139912.1A CN201510139912A CN104697865A CN 104697865 A CN104697865 A CN 104697865A CN 201510139912 A CN201510139912 A CN 201510139912A CN 104697865 A CN104697865 A CN 104697865A
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Abstract
The invention provides a bituminous concrete surface material shearing-resisting performance research device which comprises a device base, a fixed bearing platform, a movable bearing platform, a hydraulic pump, a vertical telescopic rod, a displacement sensor, a vertical loading component and a temperature control component. Both the fixed bearing platform and the movable bearing platform are arranged on the device base. Both the hydraulic pump and the displacement sensor are arranged between the device base and the movable bearing platform. A bituminous concrete material comprises a first structural layer, a second structural layer and a surface layer. The first structural layer and the second structural layer are arranged on the fixed bearing platform and the movable bearing platform respectively. A gap is formed between the first structural layer and the second structural layer in the horizontal direction. The surface layer is laid on the first structural layer and the second structural layer. The vertical loading component is arranged on the surface layer. The temperature control component is arranged in the second structural layer. By means of the bituminous concrete surface material shearing-resisting performance research device, the stress condition of the bituminous concrete surface layer under the load action can be simulated more realistically, the shearing-resistant performance and elasticity recovery performance of the material can be evaluated, and it is guaranteed that the bituminous concrete road surface layer is more reasonably designed.
Description
Technical field
The invention belongs to field of road, relate to a kind of road engineering road surface pavement performance research equipment, be specifically related to a kind of asphalt concrete pavement material shear behavior research equipment.
Background technology
Bituminous concrete pavement has the advantages such as initial stage cost is low, noise is low, surface evenness is good, road-ability is good, therefore worldwide should have a lot of.The high-grade highway of China more than 95% all adopts bituminous pavement, and the cement concrete pavement in low-grade highway is also progressively transforming bituminous pavement as, to increase road-ability and to recover road surface pavement performance.And old cement concrete road is usually with plat-bottom escape, disease such as disconnected plate and crack etc., the bituminous concrete after overlay is very easily subject to excessive vertical shear stress at crack place and destroys, i.e. crack reflection disease.
Prior art mainly solves crack reflection problem from improving pavement structure and improving the strength of materials two aspects: improving pavement structure mainly increases overlay thickness or between cement layer and brea bed, increase functional layer to relax road surface shear stress, this not only adds difficulty of construction, more improve economic cost; Improve the strength of materials and mainly comprise the tension and shearing strength two aspects that improve material, prior art to the tension of material and shearing strength research of common occurrence, shearing strength mainly concentrates on the performance study of interlayer, and to the research that the structural shearing strength of material is not correlated with, the Shear Analysis of bituminous concrete in pavement structure more can be close the force-bearing situation of simulation material under load action, the shearing strength of existing scholar's testimonial material is also weigh the major influence factors of material plasticity distortion.Mainly triaxial shear test, uniaxial penetration test, the rotational shear tests etc. of existing material shearing strength research method, all do not have the shear behavior carrying out analysis of material from structural angle, more not relevant research equipment.
Summary of the invention
For the vacancy that the structural shear behavior of existing Asphalt Concrete Overlay is evaluated, the object of the present invention is to provide the force-bearing situation of a kind of simulation Asphalt Concrete Overlay more really under load action, the shear behavior that evaluating material can be taken into account and elastic recovery properties and guarantee the design more reasonably asphalt concrete pavement material shear behavior research equipment of overlay on concrete pavement.
The technical solution adopted in the present invention is as follows:
A kind of asphalt concrete pavement material shear behavior research equipment, is characterized in that: described asphalt concrete pavement material shear behavior research equipment comprises 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 all arranged between plant bottom case and movable plummer; Described hydraulic pump drive activity plummer vertically moves; The upper surface of described fixing plummer and the upper surface of movable plummer are in same level in its natural state; Asphalt concrete material to be tested comprises structural sheet and surface layer; Structural sheet comprises the first structural sheet and the second structural sheet; First structural sheet is arranged on the upper surface of fixing plummer; Second structural sheet is arranged on the upper surface of movable plummer; First structural sheet and the second structural sheet are provided with gap in the horizontal direction; First structural sheet and the second structural sheet are spliced to form structural sheet in the horizontal plane; Topping laying is at the upper surface of structural sheet; Described vertical loading component is arranged on the upper surface of surface layer and is placed in directly over the first structural sheet; Described temperature-controlled member is arranged in the second structural sheet.
As preferably, the gap between the first structural sheet of the present invention and the second structural sheet is adjustable.
As preferably, asphalt concrete pavement material shear behavior research equipment of the present invention also comprises the interstitial site adjusting gear be arranged on fixing plummer; Described interstitial site adjusting gear comprises 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 also can moves horizontally on moving track; Described first structural sheet is arranged on floating holder; Described bolt drives the first structural sheet 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, the counterweight that vertical loading component of the present invention comprises load dish and is arranged on load dish; Described load dish is arranged on the upper surface of surface layer and is placed in directly over the first structural sheet.
As preferably, load dish of the present invention is concordant with the end face of the first structural sheet.
As preferably, temperature-controlled member of the present invention comprises power supply, temperature controller, thermopair and temp probe; Described temp probe is embedded in the second structural sheet; Described thermopair is placed between the second structural sheet and movable plummer upper surface; Described temp probe and thermopair are connected with temperature controller respectively; Described temperature controller is connected with power supply.
As preferably, vertical contraction pole of the present invention comprises the first fixed bar, the second fixed bar and Compress Spring; Described first fixed bar is tubular; It is inner that described second fixed bar stretches into the first fixed bar; Compress Spring is provided with between described second fixed bar and the first fixed bar; Described first fixed bar is connected with movable plummer lower surface; Described second fixed bar is connected with plant bottom case.
Compared with prior art, the invention has the advantages that:
The invention provides a kind of asphalt concrete pavement material shear behavior research equipment, form primarily of load load bearing component, displacement loading component and temperature-controlled member.Load load bearing component comprises fixing plummer, movable plummer and vertical contraction pole; Displacement loading component comprises hydraulic pump, displacement transducer, load dish, counterweight, floating holder and bolt; Temperature-controlled member comprises temp probe, thermopair and temperature controller.The half of structural sheet pastes on floating holder, and second half pastes on movable plummer, and surface layer is taped against on structural sheet, is exerted pressure by load dish, and its side is fixed.Hydraulic pump makes wherein structural sheet half do vertical displacement, and second half maintenance is static, mechanics feature analysis, and Here it is, and surface layer is subject to shear action at gap location, the shearing strain quantity of displacement transducer test structure.The repeat function of hydraulic pump, what surface layer was repeated receives shear action, and from shear failure number of times, displacement evaluates the anti-shear performance of surface material.The present invention fully simulates the working condition that asphalt concrete material bears shear stress, from the shear behavior of structural shearing resistance angle measurement asphalt concrete material, and can take into account the recoverable force ability evaluating bituminous concrete.The shear behavior under different temperatures, different load action, different distortion operating mode and anti-fatigue performance can be studied.To the design of Old cement concrete overlay and composite pavement, construction, all there is 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;
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, the name corresponding to the Reference numeral in accompanying drawing is called:
1-fixes plummer; The movable plummer of 2-; The vertical contraction pole of 3-; 4-hydraulic pump; 5-displacement transducer; 6-load-carrying dish; 7-counterweight; 8-floating holder; 9-bolt; 10-temp probe; 11-thermopair; 12-power supply; 13-temperature controller; 14-structural sheet; 15-surface layer; 16-first fixed bar; 17-second fixed bar; 18-Compress Spring.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme provided by the present invention is described in detail:
See Fig. 1 and Fig. 2, the invention provides a kind of asphalt concrete pavement material shear behavior research equipment, comprise plant bottom case, load load bearing component, displacement loading component and temperature-controlled member.Wherein, load load bearing component comprises fixing plummer 1, movable plummer 2 and vertical contraction pole 3; Displacement loading component comprises hydraulic pump 4, displacement transducer 5, load dish 6, counterweight 7, floating holder 8 and bolt 9; Temperature-controlled member comprises temp probe 10, thermopair 11 and temperature controller 13.
Fixing plummer 1 is fixedly installed on plant bottom case; Movable plummer 2 is arranged on plant bottom case by vertical contraction pole 3; Hydraulic pump 4 and displacement transducer 5 are all arranged between plant bottom case and movable plummer 2; Hydraulic pump 4 driving activity plummer 2 vertically moves; The fixing upper surface of plummer 1 and the upper surface of movable plummer 2 are in same level in its natural state; Asphalt concrete material to be tested comprises structural sheet 14 and surface layer 15; Structural sheet 14 comprises the first structural sheet and the second structural sheet; First structural sheet is arranged on the upper surface of fixing plummer 1; Second structural sheet is arranged on the upper surface of movable plummer 2; First structural sheet and the second structural sheet are provided with gap in the horizontal direction; First structural sheet and the second structural sheet are spliced to form structural sheet in the horizontal plane; Surface layer 15 is laid on the upper surface of structural sheet 14; Vertical loading component is arranged on the upper surface of surface layer and is placed in directly over the first structural sheet; Temperature-controlled member is arranged in the second structural sheet.
Load load bearing component: fixing plummer 1 and movable plummer 2 form bearing system, the stability of the vertical movement of vertical contraction pole 3 guarantee activity plummer 2.
Displacement loading component: displacement transducer 5 hydraulic control pump 4 loads movable plummer 2, on load dish 6, counterweight 7 and the hydraulic pump 4 of varying number provides the shear action to test specimen, and bolt 9 promotes floating holder 8 control critical eigenvalue width.
Temperature-controlled member: temperature controller 13 controls power supply 12 by temp probe 10 and is energized to thermopair 11.Temp probe be structural sheet shaping time be deployed in structural sheet; Thermopair is laid in the top layer of floating holder below structural sheet and movable plummer.
Structural sheet 14 comprises independently two halves (the first structural sheet and the second structural sheet), wherein half (the first structural sheet) pastes on floating holder 8, second half (second structural sheet) pastes on movable plummer 2, surface layer 15 is taped against on structural sheet 14, exerted pressure by load dish 6, its side (part on the first structural sheet) is fixed.
Load dish 6 is used to hold counterweight 7, and load dish 6 is directly put into the top of surface layer 15, aligns on the right side of it with the left side in structural sheet 14 gap, with floating holder 8 without being connected.Bolt 9 is directly connected with floating holder 8, and bolt 9 can promote, pull floating holder 8 to move, and makes the gap in the middle of structural sheet 14 reduce or increase.Floating holder 8 is connected with fixing plummer 1 by the cutting with certain intervals, is namely ensured the fixed value in the gap in the middle of structural sheet 14 by cutting one by one, ensures that floating holder 8 is under the impact of movable plummer 2 vertical displacement, transversal displacement does not occur.
Displacement transducer 5 hydraulic control pump 4 loads movable plummer 2, and on load dish 6, counterweight 7 and the hydraulic pump 4 of varying number provides the shear action to test specimen, and bolt 9 promotes floating holder 8 control critical eigenvalue width.
Be provided separately in the middle of fixing plummer 1 and movable plummer 2, gap is wherein 3 ~ 5mm according to workmanship precision setting, and guarantee activity plummer 2, in vertical displacement process, is mutually dawdled due to centre-of gravity shift, affected measuring accuracy.
On fixing plummer 1 structure fixing-stable platform or on other fixing objects, ensure that the left side part of test specimen in test process keeps stationary state.Movable plummer 2 provides load by hydraulic pump 4, makes it make vertical displacement, and vertical contraction pole 3 ensures that live load platform centre-of gravity shift does not occur and arranges in displacement process, is just laterally carrying out constraint live load platform.See Fig. 3, vertical contraction pole of the present invention comprises the first fixed bar 16, second fixed bar 17 and Compress Spring 18; First fixed bar 16 is in tubular; It is inner that second fixed bar 17 stretches into the first fixed bar 16; Compress Spring 18 is provided with between second fixed bar 17 and the first fixed bar; First fixed bar 16 is connected with movable plummer 2 lower surface; Second fixed bar 17 is connected with plant bottom case.
Principle of the present invention is: the half of structural sheet 14 pastes on floating holder 8, and second half pastes on movable plummer 2, and surface material paving 15, on structural sheet 14, is exerted pressure by load dish 6, its side is fixed.Hydraulic pump makes wherein structural sheet half do vertical displacement, and second half maintenance is static, mechanics feature analysis, and Here it is, and surface layer 15 is subject to shear action at gap location, the shearing strain quantity of displacement transducer 5 test structure.The repeat function of hydraulic pump 4, what surface layer 15 was repeated receives shear action, and from shear failure number of times, displacement evaluates the anti-shear performance of surface material.The present invention simulates the force-bearing situation of Asphalt Concrete Overlay under load action more really, can take into account shear behavior and the elastic recovery properties of evaluating material, guarantees that the design of overlay on concrete pavement is more reasonable.
Above-mentioned embodiment is a preferred embodiment of the present invention; be not for limiting enforcement of the present invention and right; all equivalences made according to the content described in the present patent application scope of patent protection change and modify, and all should be included in patent claim of the present invention.
Claims (8)
1. an asphalt concrete pavement material shear behavior research equipment, is characterized in that: described asphalt concrete pavement material shear behavior research equipment comprises 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 all arranged between plant bottom case and movable plummer; Described hydraulic pump drive activity plummer vertically moves; The upper surface of described fixing plummer and the upper surface of movable plummer are in same level in its natural state; Asphalt concrete material to be tested comprises structural sheet and surface layer; Structural sheet comprises the first structural sheet and the second structural sheet; First structural sheet is arranged on the upper surface of fixing plummer; Second structural sheet is arranged on the upper surface of movable plummer; First structural sheet and the second structural sheet are provided with gap in the horizontal direction; First structural sheet and the second structural sheet are spliced to form structural sheet in the horizontal plane; Topping laying is at the upper surface of structural sheet; Described vertical loading component is arranged on the upper surface of surface layer and is placed in directly over the first structural sheet; Described temperature-controlled member is arranged in the second structural sheet.
2. asphalt concrete pavement material shear behavior research equipment according to claim 1, is characterized in that: the gap between described first structural sheet and the second structural sheet is adjustable.
3. asphalt concrete pavement material shear behavior research equipment according to claim 2, is characterized in that: described asphalt concrete pavement material shear behavior research equipment also comprises the interstitial site adjusting gear be arranged on fixing plummer; Described interstitial site adjusting gear comprises 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 also can moves horizontally on moving track; Described first structural sheet is arranged on floating holder; Described bolt drives the first structural sheet to move in the horizontal plane by floating holder.
4. asphalt concrete pavement material shear behavior research equipment according to claim 3, is characterized in that: described moving track is screw thread, leading screw or cutting.
5. the asphalt concrete pavement material shear behavior research equipment according to claim 1 or 2 or 3 or 4, is characterized in that: the counterweight that described vertical loading component comprises load dish and is arranged on load dish; Described load dish is arranged on the upper surface of surface layer and is placed in directly over the first structural sheet.
6. asphalt concrete pavement material shear behavior research equipment according to claim 5, is characterized in that: described load dish is concordant with the end face of the first structural sheet.
7. asphalt concrete pavement material shear behavior research equipment according to claim 6, is characterized in that: described temperature-controlled member comprises power supply, temperature controller, thermopair and temp probe; Described temp probe is embedded in the second structural sheet; Described thermopair is placed between the second structural sheet and movable plummer upper surface; Described temp probe and thermopair are connected with temperature controller respectively; Described temperature controller is connected with power supply.
8. asphalt concrete pavement material shear behavior research equipment according to claim 7, is characterized in that: described vertical contraction pole comprises the first fixed bar, the second fixed bar and Compress Spring; Described first fixed bar is tubular; It is inner that described second fixed bar stretches into the first fixed bar; Compress Spring is provided with between described second fixed bar and the first fixed bar; Described first fixed bar is connected with movable plummer lower surface; Described second fixed 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 |
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| 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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| CN104697865A true CN104697865A (en) | 2015-06-10 |
| CN104697865B 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043870A (en) * | 2015-07-08 | 2015-11-11 | 中国石油天然气股份有限公司 | Storage tank corrosion-resistant sealing detection device |
| 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 |
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| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043870A (en) * | 2015-07-08 | 2015-11-11 | 中国石油天然气股份有限公司 | Storage tank corrosion-resistant sealing detection device |
| 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 |
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| Publication number | Publication date |
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| CN104697865B (en) | 2016-10-26 |
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