CN201156046Y - Simulating experiment frame for water damage of asphalt concrete pavement - Google Patents
Simulating experiment frame for water damage of asphalt concrete pavement Download PDFInfo
- Publication number
- CN201156046Y CN201156046Y CNU2008200173759U CN200820017375U CN201156046Y CN 201156046 Y CN201156046 Y CN 201156046Y CN U2008200173759 U CNU2008200173759 U CN U2008200173759U CN 200820017375 U CN200820017375 U CN 200820017375U CN 201156046 Y CN201156046 Y CN 201156046Y
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- asphalt concrete
- casing
- housing
- pavement
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Abstract
The utility model relates to a simulation test frame for the water damage of an asphalt concrete pavement, which comprises a casing made of transparent material. A groove is arranged at the upper part of the casing, asphalt concrete sample is arranged inside the casing, a heating/refrigerating device is arranged inside the asphalt concrete sample, a plurality of measuring points in different positions are arranged on the casing, measuring resistivity connection points are arranged at the measuring points, and are connected with a testing device outside the casing through a conductor; a plurality of camcorders are arranged in different positions outside the casing. When in use, colored water is sprinkled on the upper part of the asphalt concrete sample, after infiltration, a roller is rolled inside the groove of the casing, the internal temperature variation condition of the asphalt concrete pavement is simulated through the heating/refrigerating device, the running condition of water in the cross section of the road bed is recorded through the high speed camcorders, and the water distribution can be studied by testing the resistivity of different areal sections, and the damage regulation of the road bed pore water to the road bed and the experiment reference can be generalized. Corresponding measures can be taken during the actual application, the pavement damage can be reduced, and the resources can be saved.
Description
Technical field
The utility model relates to a kind of simulation test testing device, and specifically a kind of intuitively observation water is destroyed the simulation test frame of the asphalt concrete pavement water destruct of situation to bituminous concrete pavement.
Background technology
We know that inside, road surface (or structural sheet) draining is not considered in the pavement structure of China design at present traditionally, also do not consider to prevent water enchroachment (invasion) evil basic unit, and the result makes water enter surface layer but can't get out, and lets alone to bring into play in road surface structare layer destruction.
Highway engineering asphalt mat destroy one very important reasons is that water is caused.There is the water of squeezing in surface precipitation and the roadbed in the source of water in the asphalt mat.Atmospheric precipitation is seeped in the asphalt mat and row does not go out, and under the effect of carload and temperature variation, asphalt mat is produced destroy.Winter-spring season, snowfall (melting the back daytime) and precipitation infiltrate the road surface, and freeze night, and melt second day daytime, and freeze night again, and this repeatedly multigelation can make water destruct more serious.
One, the reason of road surface water destruct
The phenomenon of water destruct is ubiquity in the road surface, various places, and highway pavement has been caused very serious destruction.Surface gathered water according to the different retention position of water, under the high vehicle speeds effect, can produce following different breakoff phenomenon after infiltrating surface layer.
(1) surface produces the hole, hole
In the precipitation process, rainwater can enter and be trapped in the space of superficial layer bituminous concrete, under the effect of the impact load that a large amount of high vehicle speeds are produced, the flowing pressure that surface gathered water produced makes pitch get off from the rubble surfacial spalling, local bituminous concrete becomes loose, rubble is thrown away by wheel, and the road surface forms the hole, hole.When adopting the semi-open type bituminous concrete surface layer, the water destruct that the road surface produces is comparatively serious.
(2) superficial layer and middle surface layer produce hole, hole and local surfaces generation check crack and distortion simultaneously
In the precipitation process, infiltrate and be trapped in superficial layer and the middle surface layer as free water, the traffic load effect make two-layer in the bituminous concrete pitch on the part rubble peel off, cause the surface to produce check crack, distortion and push or form the hole, hole laterally.
(3) purt mud, check crack, hole, hole
Road surface water sees through asphalt mat and is trapped in the semi-rigid type base end face, and under the high vehicle speeds effect, the fines on base mixture top layer forms canescence mud under the washing away of the flowing pressure that free water produced.Mortar is driven a vehicle presses purt to road surfaces, makes the road surface one one white mortar occur; Under the big situation of mortar quantity, can progressively form the hole, hole; Under the situation of substrate surface large tracts of land purt mud, basic unit's end face is soft, and distortion or check crack appear in the road surface.Because the distortion and the check crack on road surface, water easier infiltration in road surface produces vicious cycle, finally causes pavement destruction.
The principal element that the bituminous pavement generation destroys is that the voidage of bituminous concrete itself is big, compactness is not enough, pellet is inhomogeneous.When voidage is big, will certainly be in the road surface behind the rain ponding.Water in the asphalt mat can't be discharged, and asphalt building stones behind full water reduce with the pitch adhesive force, easily peels off, loose the shearing strength of reduction bituminous pavement.Behind the winter precipitation, when water freezes volume increase about 9%, at the inner frost heave stress that produces of bituminous pavement; Temperature raises, freeze thawingization.Under the effect of freeze thawing round-robin, asphalt is loose, thus early damages such as hole, appearance hole.
And also do not have a kind of measurement directly perceived to observe the device of the pressure of water in the road surface at present, and can not determine the destruction situation in the road surface in advance, can not prevent in advance the destruction of road.
Summary of the invention
The utility model provides a kind of simple in structure, easy to operate, intuitively the simulation test frame of the asphalt concrete pavement water destruct of the destruction situation of observation water road pavement inside for overcoming above-mentioned the deficiencies in the prior art.
The purpose of this utility model is to adopt following technical proposals to realize: a kind of simulation test frame of asphalt concrete pavement water destruct, comprise housing, housing is made by transparent material, housing top is provided with groove, be provided with the bituminous concrete sample in the housing, be provided with heating and refrigerating plant in the bituminous concrete sample; The measuring point of several diverse locations is set on the housing, and the measuring point place is provided with measuring resistance rate contact, and measuring resistance rate contact is connected by the outer proving installation of lead and housing, is used for testing the resistivity of different sections, reacts this section road surface according to this and includes the regimen condition.Diverse location is provided with some video cameras outside housing.
Described heating arrangement is a heating electrode.
Described refrigerating plant is a refrigerator pipes.
Be provided with heating and refrigerator pipes (rod) in the bituminous concrete sample in the housing, heating electrode is used for simulating the high temperature road surface in summer and acts on, and cooling rod is used for simulated roadway congelation in winter, the pavement destruction that colds and heat succeed each other and cause.
Transparent shell of the present utility model is convenient to observe and the shooting record, arranges a plurality of different measuring points on device, is used for measuring the resistivity size in the bituminous concrete pavement sample, so that analyze the distribution situation of water in the bituminous concrete pavement.
During use, after colored water is sprinkled upon bituminous concrete sample top simulation surface gathered water and infiltrates surface layer, adopt the roller of a constant weight in the groove of housing, to simulate the automotive wheel rolling then, and the bituminous concrete pavement internal temperature by (winter severe cold and summer high temperature) under heated by electrodes or the different natural conditions of refrigeration simulation changes actual conditions, colored water enters in the interior space of bituminous concrete, moving around of roller, cause bituminous concrete inner pore water generates dynamic pressure, damage the road structure different aspects, be clear that and the ruuning situation of high-speed photography record roadbed cross section water by transparent shell, readily appreciate that pore water is to the destruction in the road structure.Resistivity by test zones of different section can further be understood moisture distribution, compare with the water photorecording, sum up the roadbed pore water, can make relative measures in the practical application rule and experimental basis that roadbed destroys, reduce the damage on road surface, economize on resources to greatest extent.
The utlity model has simple in structure, easy to operate, the advantages such as destruction situation of observation water road pavement inside intuitively.
Description of drawings
Fig. 1 is the utility model structural representation;
1. housings wherein, 2. groove, 3. bituminous concrete sample, 4. heating electrode, 5. refrigerator pipes, 6. measuring point 7. rolls and control device, 8. measuring resistance rate contact, 9. resistivity measurement device, 10. high speed video camera.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Among Fig. 1, housing 1 is made by transparent material, housing 1 top is provided with groove 2, be provided with bituminous concrete sample 3 in the housing 1, be provided with heating and refrigerating plant in the bituminous concrete sample 3 in the housing 1, the measuring point 6 of several diverse locations is set on the housing 1, measuring point 6 places are provided with measuring resistance rate contact 8, measuring resistance rate contact 8 is connected by the outer proving installation 9 of lead and housing, is used for testing the resistivity of different sections, reacts this section road surface according to this and includes the regimen condition.Be provided with a plurality of high speed video cameras 10 in housing 1 outside different azimuth.Heating arrangement is a heating electrode 4.Refrigerating plant is a refrigerator pipes 5.
During use, colored water is sprinkled upon bituminous concrete sample 3 tops, simulating automotive wheel by the roller that rolls and control device 7 is controlled a constant weight in the groove 2 of housing 1 then rolls, and by the actual conditions under heating electrode 4 heating or the refrigerator pipes 5 refrigeration simulation different temperatures, colored water enters in the space in the bituminous concrete style 3.Shell at device is arranged a plurality of different measuring points 6, by the resistivity size in resistivity measurement device 9 and the measuring resistance rate contact 8 measurement bituminous concrete samples 3, so that the distribution situation of water in the analysis bituminous concrete pavement, the dynamic change of coloured water in the outside utilizes high-speed camera 10 record experimentation medium pitch concrete styles 3 cross sections simultaneously, thereby the clear effect of seeing water to bituminous concrete pavement, and the inner rotten situation of damaging of bituminous pavement, sum up rule, can make relative measures in the practical application, reduce the damage on road surface, economize on resources to greatest extent.
Claims (3)
1. the simulation test frame of an asphalt concrete pavement water destruct, comprise housing, it is characterized in that: housing is made by transparent material, housing top is provided with groove, be provided with the bituminous concrete sample in the housing, be provided with heating and refrigerating plant in the bituminous concrete sample, the measuring point of several diverse locations is set on the housing, the measuring point place is provided with measuring resistance rate contact, and measuring resistance rate contact is connected by the outer proving installation of lead and housing; Diverse location is provided with some video cameras outside housing.
2. the simulation test frame of asphalt concrete pavement water destruct according to claim 1, it is characterized in that: described heating arrangement is a heating electrode.
3. the simulation test frame of asphalt concrete pavement water destruct according to claim 1, it is characterized in that: described refrigerating plant is a refrigerator pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200173759U CN201156046Y (en) | 2008-02-03 | 2008-02-03 | Simulating experiment frame for water damage of asphalt concrete pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200173759U CN201156046Y (en) | 2008-02-03 | 2008-02-03 | Simulating experiment frame for water damage of asphalt concrete pavement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201156046Y true CN201156046Y (en) | 2008-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200173759U Expired - Fee Related CN201156046Y (en) | 2008-02-03 | 2008-02-03 | Simulating experiment frame for water damage of asphalt concrete pavement |
Country Status (1)
| Country | Link |
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| CN (1) | CN201156046Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226187B (en) * | 2008-02-03 | 2010-12-29 | 山东大学 | Simulation test testing device for asphalt concrete pavement water destruct |
| CN102662044A (en) * | 2012-04-26 | 2012-09-12 | 河海大学 | Device and method for bituminous concrete hydraulic fracture testing |
| CN110823770A (en) * | 2019-11-29 | 2020-02-21 | 郑州航空工业管理学院 | Sponge city permeable pavement dust migration experimental device |
-
2008
- 2008-02-03 CN CNU2008200173759U patent/CN201156046Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226187B (en) * | 2008-02-03 | 2010-12-29 | 山东大学 | Simulation test testing device for asphalt concrete pavement water destruct |
| CN102662044A (en) * | 2012-04-26 | 2012-09-12 | 河海大学 | Device and method for bituminous concrete hydraulic fracture testing |
| CN102662044B (en) * | 2012-04-26 | 2015-03-04 | 河海大学 | Device and method for bituminous concrete hydraulic fracture testing |
| CN110823770A (en) * | 2019-11-29 | 2020-02-21 | 郑州航空工业管理学院 | Sponge city permeable pavement dust migration experimental device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081126 |