CN108426819B - Concrete that permeates water under vibration stops up and maintains effect testing arrangement - Google Patents
Concrete that permeates water under vibration stops up and maintains effect testing arrangement Download PDFInfo
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- CN108426819B CN108426819B CN201810035213.6A CN201810035213A CN108426819B CN 108426819 B CN108426819 B CN 108426819B CN 201810035213 A CN201810035213 A CN 201810035213A CN 108426819 B CN108426819 B CN 108426819B
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- 238000012360 testing method Methods 0.000 title claims abstract description 140
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 230000000694 effects Effects 0.000 title claims abstract description 30
- 239000004567 concrete Substances 0.000 title claims description 72
- 239000012466 permeate Substances 0.000 title description 2
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 239000011380 pervious concrete Substances 0.000 claims abstract description 29
- 230000035699 permeability Effects 0.000 claims abstract description 24
- 230000008859 change Effects 0.000 claims abstract description 19
- 230000009471 action Effects 0.000 claims abstract description 16
- 238000012423 maintenance Methods 0.000 claims abstract description 15
- 238000011161 development Methods 0.000 claims abstract description 11
- 239000000428 dust Substances 0.000 claims description 24
- 239000000523 sample Substances 0.000 claims description 15
- 238000000429 assembly Methods 0.000 claims description 13
- 230000000712 assembly Effects 0.000 claims description 13
- 229920001971 elastomer Polymers 0.000 claims description 13
- 230000000903 blocking effect Effects 0.000 claims description 11
- 238000009825 accumulation Methods 0.000 claims description 7
- 238000013016 damping Methods 0.000 claims description 6
- 239000004816 latex Substances 0.000 claims description 6
- 229920000126 latex Polymers 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 229940099259 vaseline Drugs 0.000 claims description 3
- 238000011160 research Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
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- Biochemistry (AREA)
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Abstract
The invention discloses a device for testing the blockage and maintenance effects of pervious concrete under the vibration action. The test device comprises a support, a low-frequency vibration mechanism, a main body test device and a metering and analyzing device, wherein the low-frequency vibration mechanism is used for simulating vibration caused by vehicles on a road surface, the metering and analyzing device is used for acquiring a water permeability coefficient in real time, and the influence degree of the vibration on the blockage development of the pervious concrete is determined according to the change of the water permeability coefficient.
Description
Technical Field
The invention relates to the field of permeable pavement performance research, in particular to a permeable concrete blocking and maintaining effect testing device under the vibration action.
Background
The traditional permeable pavement permeability blockage testing device cannot simulate the vertical vibration generated by the running of a vehicle on a pavement, and part of the original devices simulate the vibration of the pavement by a method of mounting a vibration table at the bottom, so that the propagation of the vibration from bottom to top does not accord with the real situation.
Disclosure of Invention
The invention aims to provide a testing device for the permeability of a permeable pavement, which aims to simulate the influence of vibration caused by running of a vehicle on the pavement on the blockage degree of the permeable pavement and the influence of vacuum dust removal on the reduction of the blockage degree.
In order to achieve the purpose, the invention provides the following scheme:
a testing device for the plugging and maintenance effects of pervious concrete under the action of vibration comprises a bracket, a low-frequency vibration mechanism, a main testing device and a metering and analyzing device;
the lower part of the bracket is provided with the main body testing device, a concrete test piece is arranged in the main body testing device, accumulated water with a preset depth is accumulated on the upper part of the concrete test piece in the main body testing device, and the accumulated water flows out through an outlet of the main body testing device after permeating out from the concrete test piece;
the low-frequency vibration mechanism is arranged at the upper part of the bracket, the vibration output end of the low-frequency vibration mechanism is in contact with the concrete test piece, and the low-frequency vibration mechanism generates vibration to act on the concrete test piece, so that the vibration caused by vehicles on a road surface is simulated, and the change of the mass of water permeating from the concrete test piece is changed;
an outlet on the main body testing device is arranged corresponding to the metering analysis device, so that water flowing out of the main body testing device flows into the metering analysis device;
the measuring and analyzing device is used for measuring the change of the mass of the water permeated from the concrete test piece under the vibration simulated by the low-frequency vibration mechanism to obtain the permeation rate, and calculating the water permeability coefficient of the concrete test piece according to the permeation rate; and determining the influence degree of the vibration on the blockage development of the pervious concrete according to the change of the water permeability coefficient.
Optionally, the low-frequency vibration mechanism comprises a low-frequency vibrator, a rigid rod, a damping spring and an arc-shaped rubber pad;
the low-frequency vibrator is fixed on the bracket, and the arc-shaped rubber pad is in contact with the concrete test piece;
the low-frequency vibrator is connected with the circular arc-shaped rubber pad through the rigid rod and the damping spring.
Optionally, the main body testing device comprises a water storage part, a test piece fixing part and a seepage collecting part;
the water accumulation part, the test piece fixing part and the seepage collecting part are communicated barrel-shaped structures formed by organic glass;
the water accumulation part is positioned above the test piece fixing part and is used for accumulating accumulated water with a preset depth;
the test piece fixing part is used for fixing the concrete test piece;
the seepage collecting part is positioned below the test piece fixing part and used for collecting water seeped out by the concrete test piece under vehicle-mounted vibration and outputting the seeped water to the metering and analyzing device.
Optionally, the test piece fixing part further comprises two valve assemblies, and the two valve assemblies are connected through a flange; the concrete test piece is fixed between the two valve assemblies, and when the two valve assemblies fix the concrete test piece, vaseline is firstly smeared on the side face of the concrete test piece.
Optionally, the concrete test piece with set up the waterproof pad of latex between the valve subassembly, the waterproof pad of latex is used for preventing the concrete test piece is in the side infiltration.
Optionally, be provided with the overflow mouth of three co-altitude on the lateral wall of ponding portion, it is three the overflow mouth is used for simulating three kinds of different surface ponding depths.
Optionally, be provided with the outlet pipe on the lateral wall of infiltration collection portion, the delivery port of outlet pipe with the measurement analytical equipment corresponds the setting, the exit position of outlet pipe is provided with the valve, valve control the opening or closing of the delivery port of outlet pipe.
Optionally, the metering and analyzing device comprises a high-precision electronic scale and an upper computer;
a water tank is arranged on the high-precision electronic scale and corresponds to an outlet of the main body testing device, so that water flowing out of the outlet of the main body testing device flows into the water tank;
the high-precision electronic scale is connected with the upper computer and used for measuring the mass of the permeated water and sending the mass of the permeated water to the upper computer;
the upper computer is used for obtaining a penetration rate according to the change of the quality of the permeated water and calculating the water permeability coefficient of the concrete sample according to the penetration rate; and determining the influence degree of vibration on the plugging development of the pervious concrete and the influence of vacuum dust removal on the reduction of the plugging degree through the change of the water permeability coefficient.
Optionally, the support comprises a support platform, two support rods and a cross rod;
the two support rods are vertically fixed on the support platform, and two ends of the cross rod are respectively sleeved on the two support rods and can move up and down along the support rods;
the main body testing device is fixed on the support platform;
the low-frequency vibration mechanism is fixed on the cross rod, and the height of the low-frequency vibration machine is adjusted by adjusting the height of the cross rod, so that the arc-shaped rubber pad of the low-frequency vibration mechanism is in contact with the upper surface of the concrete test piece.
Optionally, the testing device further comprises a vacuum dust collector, and a dust removal probe of the vacuum dust collector extends into the main body testing device to remove dust from the concrete test piece in the main body testing device.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a pervious concrete blocking and maintaining effect testing device under the vibration effect, which adopts a low-frequency vibration mechanism to simulate the vibration caused by vehicles on a road surface, adopts a metering and analyzing device to obtain a permeability coefficient in real time, and reflects the influence of the vibration on the development of the pervious concrete blocking by measuring the change of the permeability coefficient of a pervious concrete test piece in real time.
The traditional device mostly adopts a flowmeter to measure the water flow permeation rate in real time, but the range (more than 10 mm/s) of the high-flow-rate low-precision flowmeter cannot measure the extremely low permeability (0.1-1mm/s) after the permeable concrete is blocked, the range (less than 1mm/s) of the low-flow-rate high-precision flowmeter cannot measure the higher permeability (10-30mm/s) before the permeable concrete is blocked, and after the inside of the permeable concrete is blocked by impurities, fine particle impurities flow into the high-precision flowmeter along with water, so that the instrument is easily damaged. In conclusion, the flowmeter is difficult to meet the research requirements of permeable concrete permeable blockage and maintenance, is expensive and complex to install, and the invention adopts the high-precision electronic scale and is connected with the upper computer to measure and record the change rate of the mass of the water in the water tank in real time, thereby realizing the high-precision real-time monitoring of the seepage velocity and overcoming the defect of the traditional flowmeter in measuring the seepage velocity of the water.
The vacuum dust collector is adopted to remove dust from the concrete test piece, and the influence of vibration caused by the simulated road vehicle on the blockage maintenance is tested by measuring the change of the water permeability coefficient of the permeable concrete test piece in real time.
Drawings
In order to more clearly illustrate the embodiments of the present invention, drawings necessary for the embodiments will be briefly described below. It is obvious that the drawing described below is only one embodiment of the invention, and that for a person skilled in the art, other drawings can be obtained from this drawing without inventive effort.
FIG. 1 is a structural diagram of a pervious concrete blocking and maintaining effect testing device under the action of vibration according to the present invention;
fig. 2 is a structural diagram of two valve assemblies of a pervious concrete blockage and maintenance effect testing device under the vibration action provided by the invention.
Detailed Description
The invention aims to provide a pervious concrete blocking and maintaining effect testing device under the vibration effect, so as to simulate the test of the influence of the vibration caused by the running of a vehicle on a road surface on the blocking degree of the pervious concrete and the test of the influence of vacuum dust removal on the reduction of the blocking degree.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1, the invention provides a device for testing the blockage and maintenance effect of pervious concrete under the action of vibration, which comprises a bracket 1, a low-frequency vibration mechanism 2, a main body testing device 3, a metering and analyzing device 4 and a vacuum dust removal device 5.
The lower part of the support 1 is provided with a main body testing device 3, a concrete test piece is arranged in the main body testing device, accumulated water with a preset depth is accumulated on the upper part of the concrete test piece in the main body testing device, and the accumulated water flows out from an outlet of the main body testing device after permeating out from the concrete test piece.
The upper portion of support 1 is provided with low frequency vibration mechanism 2, the vibration output of low frequency vibration mechanism 2 with the concrete sample contact, low frequency vibration mechanism 2 produces the vibration and acts on the concrete sample, the vibration that the simulation road surface vehicle caused.
The outlet of the main body testing device 3 is arranged corresponding to the metering and analyzing device 4, so that the water which flows out of the main body testing device 3 and seeps out of the concrete sample flows into the metering and analyzing device 4.
The measuring and analyzing device 4 is used for measuring the mass change of water permeated by the concrete test piece under the vibration simulated by the low-frequency vibration mechanism to obtain the permeation rate, and calculating the water permeability coefficient of the concrete test piece according to the permeation rate; and determining the influence degree of the vibration on the blockage development of the pervious concrete according to the change of the water permeability coefficient.
Optionally, the low-frequency vibration mechanism 2 includes a low-frequency vibrator 201, a rigid rod 202, a damper spring 203, and a circular arc-shaped rubber pad 204.
The low-frequency vibrator 201 is fixed on the support 1, and the arc-shaped rubber pad 204 is in contact with the concrete test piece.
The low-frequency vibrator 201 is connected with the arc-shaped rubber pad 204 through the rigid rod 202 and the damping spring 203.
Optionally, the main body testing device comprises a water storage part 301, a test piece fixing part 302 and a seepage collection part 303.
The water reservoir 301, the test piece fixing portion 302, and the seepage collection portion 303 are each a communicated barrel-shaped structure made of organic glass.
The water reservoir 301 is located above the test piece fixing portion 302, and the water reservoir 301 is used for storing accumulated water at a preset depth.
The specimen fixing portion 302 is used to fix a concrete specimen.
The seepage collection part 303 is located below the specimen fixing part 302, and the seepage collection part 303 is used for collecting water seeped out by the concrete specimen under vehicle-mounted vibration and outputting the seeped water to the metering and analyzing device.
Specifically, the parts are connected by a flange 308 and a waterproof cushion layer.
Optionally, as shown in fig. 2, the trial fixing part further includes two valve assemblies a and B, and the two valve assemblies a and B are connected by a flange. The concrete test piece is fixed between the two valve assemblies A and B, and vaseline is coated on the side surface of the concrete test piece when the two valve assemblies A and B fix the concrete test piece.
Optionally, a latex waterproof pad 304 is arranged between the concrete sample and the valve assembly, and the latex waterproof pad 304 is used for preventing the concrete sample from water seepage at the side surface.
Optionally, the lateral wall of the water accumulation portion 301 is provided with three overflow ports 305 with different heights, and the three overflow ports 305 are used for simulating three different depths of surface water accumulation.
Optionally, be provided with outlet pipe 306 on the lateral wall of infiltration collection portion 303, the delivery port of outlet pipe with the measurement analytical equipment corresponds the setting, the exit position of outlet pipe is provided with valve 307, valve 307 control the opening or closing of the delivery port of outlet pipe 306.
Optionally, the metrological analysis apparatus 4 includes a high-precision electronic scale 401 and an upper computer 402.
The high-precision electronic scale 401 is provided with a water tank 403, and the water tank 403 is provided corresponding to an outlet of the main body testing apparatus 3, so that water flowing out of the outlet of the main body testing apparatus 3 flows into the water tank 403.
The high-precision electronic scale 401 is connected with the upper computer 402, and the high-precision electronic scale 401 is used for measuring the mass of the permeated water and sending the mass of the permeated water to the upper computer 402.
The upper computer 402 is used for obtaining a permeation rate according to the change of the quality of the permeated water and calculating the water permeability coefficient of the concrete sample according to the permeation rate; and determining the influence degree of vibration on the blockage development of the pervious concrete according to the change of the water permeability coefficient
Specifically, the calculation method of the water permeability coefficient of the concrete sample is as follows:
wherein k represents a water permeability coefficient (mm/s), v represents a mass change rate (g/s) of the seepage water, and A represents an upper surface area (mm) of the concrete sample2) L represents the height (mm) of the concrete sample, H represents the density (g/mm) of water accumulated by the water head (mm) (. rho)3)。
Optionally, the stand 1 includes a stand platform 101, two support bars 102 and a cross bar 103.
The two support rods 102 are vertically fixed on the support platform 101, and two ends of the cross rod 103 are respectively sleeved on the two support rods 102 and can move up and down along the support rods 102.
The main body testing device 3 is fixed on the support platform 101.
The low-frequency vibration mechanism 2 is fixed on the cross rod, and the height of the low-frequency vibration mechanism 2 is adjusted by adjusting the height of the cross rod 103, so that the arc-shaped rubber 204 of the low-frequency vibration mechanism is in contact with the upper surface of the concrete test piece, and a certain pressure is formed.
Optionally, the testing device further comprises a vacuum dust collector 5, wherein a dust removal probe 501 of the vacuum dust collector extends into the main testing device 3 to remove dust from the concrete test piece in the main testing device 3 to reduce the blockage degree.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a pervious concrete blocking and maintaining effect testing device under the vibration effect, which adopts a low-frequency vibration mechanism to apply vibration to the surface of a test piece from the top so as to realize the simulation of vehicle-mounted vibration under different frequencies, and adopts a metering and analyzing device to realize the real-time measurement and analysis of the influence of different vibration frequencies and vibration duration on the blocking development.
The low-frequency vibrator is connected with the upper surface of the concrete test piece through the rigid rod and the damping spring, and the arc-shaped rubber pad is additionally arranged on the contact surface of the concrete test piece, so that the effect of simulating vehicle-mounted vibration is achieved, the vibration is transmitted from top to bottom, and the low-frequency vibrator is more practical.
The invention adopts the vacuum dust collector to remove dust on the surface of the concrete test piece, can study the influence of the vibration characteristic on the maintenance effect of vacuum dust removal, and conforms to the actual working process of the road dust removal vehicle as far as possible.
The invention adopts a high-precision electronic scale and connects with an upper computer (computer), records the mass of the permeated water in real time, calculates the permeation rate of the water according to the mass, and overcomes the defect that the traditional flowmeter measures the permeation rate of the water.
The test device has the advantages of compact structure, easy assembly, simple operation, visual and convenient test data output, and the following simulation experiments can be performed:
experimental study on the plugging development of pervious concrete at different vehicle-mounted vertical vibration frequencies (0-60 Hz).
And (5) researching the water permeability recovery effect by a vacuum dust removal mode.
And (3) experimental research on the plugging development of the permeable test piece by different water flow depths.
The simulation road surface cleaning vehicle adopts the research of vacuum dust removal to the jam recovery effect under self on-vehicle vibrations.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The technical principle and the embodiments are explained by applying specific examples, the above examples are only for assisting understanding of the technical method and the core idea of the present invention, and the described examples are only examples of the present invention, and not all examples. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.
Claims (10)
1. A testing device for the plugging and maintenance effects of pervious concrete under the vibration action is characterized by comprising a bracket, a low-frequency vibration mechanism, a main testing device and a metering and analyzing device;
the lower part of the bracket is provided with the main body testing device, a concrete test piece is arranged in the main body testing device, accumulated water with a preset depth is accumulated on the upper part of the concrete test piece in the main body testing device, and the accumulated water flows out through an outlet of the main body testing device after permeating out from the concrete test piece;
the low-frequency vibration mechanism is arranged at the upper part of the bracket, the vibration output end of the low-frequency vibration mechanism is in contact with the concrete test piece, and the low-frequency vibration mechanism generates vibration to act on the concrete test piece, so that the vibration caused by vehicles on a road surface is simulated, and the change of the mass of water permeating from the concrete test piece is changed;
an outlet on the main body testing device is arranged corresponding to the metering analysis device, so that water flowing out of the main body testing device flows into the metering analysis device;
the measuring and analyzing device is used for measuring the change of the mass of the water permeated from the concrete test piece under the vibration simulated by the low-frequency vibration mechanism to obtain the permeation rate, and calculating the water permeability coefficient of the concrete test piece according to the permeation rate; and determining the influence degree of the vibration on the blockage development of the pervious concrete according to the change of the water permeability coefficient.
2. The pervious concrete blocking and maintaining effect testing device under the vibration action of claim 1, wherein the low-frequency vibration mechanism comprises a low-frequency vibrator, a rigid rod, a damping spring and an arc-shaped rubber pad;
the low-frequency vibrator is fixed on the bracket, and the arc-shaped rubber pad is in contact with the concrete test piece;
the low-frequency vibrator is connected with the circular arc-shaped rubber pad through the rigid rod and the damping spring.
3. The pervious concrete blockage and maintenance effect testing device under the action of vibration of claim 1, wherein the main body testing device comprises a water storage part, a test piece fixing part and a seepage collecting part;
the water accumulation part, the test piece fixing part and the seepage collecting part are communicated barrel-shaped structures formed by organic glass;
the water accumulation part is positioned above the test piece fixing part and is used for accumulating accumulated water with a preset depth;
the test piece fixing part is used for fixing the concrete test piece;
the seepage collecting part is positioned below the test piece fixing part and used for collecting water seeped out by the concrete test piece under vehicle-mounted vibration and outputting the seeped water to the metering and analyzing device.
4. The pervious concrete blockage and maintenance effect testing device under the action of vibration of claim 3, wherein the test piece fixing part further comprises two valve assemblies, and the two valve assemblies are connected through a flange; the concrete test piece is fixed between the two valve assemblies, and when the two valve assemblies fix the concrete test piece, vaseline is firstly smeared on the side face of the concrete test piece.
5. The device for testing the blockage and maintenance effect of the pervious concrete under the vibration action of claim 4, wherein a latex waterproof pad is arranged between the concrete test piece and the valve assembly, and the latex waterproof pad is used for preventing the concrete test piece from being soaked in water on the side surface.
6. The device for testing the blockage and maintenance effect of the pervious concrete under the vibration action according to claim 3, wherein three overflow ports with different heights are arranged on the side wall of the water accumulation part, and the three overflow ports are used for simulating three different depths of the water accumulated on the road surface.
7. The device for testing the blockage and maintenance effect of the pervious concrete under the vibration action according to claim 3, wherein a water outlet pipe is arranged on the side wall of the seepage collection part, a water outlet of the water outlet pipe is arranged corresponding to the metering and analyzing device, a valve is arranged at the outlet position of the water outlet pipe, and the valve controls the opening or closing of the water outlet pipe.
8. The pervious concrete blocking and maintaining effect testing device under the action of vibration of claim 1, wherein the metering and analyzing device comprises a high-precision electronic scale and an upper computer;
a water tank is arranged on the high-precision electronic scale and corresponds to an outlet of the main body testing device, so that water flowing out of the outlet of the main body testing device flows into the water tank;
the high-precision electronic scale is connected with the upper computer and used for measuring the mass of the permeated water and sending the mass of the permeated water to the upper computer;
the upper computer is used for obtaining a penetration rate according to the change of the quality of the permeated water and calculating the water permeability coefficient of the concrete sample in real time according to the penetration rate; and determining the influence degree of the vibration on the blockage development of the pervious concrete according to the change of the water permeability coefficient.
9. The device for testing the blockage and maintenance effect of the pervious concrete under the vibration action according to claim 1, wherein the bracket comprises a bracket platform, two supporting rods and a cross rod;
the two support rods are vertically fixed on the support platform, and two ends of the cross rod are respectively sleeved on the two support rods and can move up and down along the support rods;
the main body testing device is fixed on the support platform;
the low-frequency vibration mechanism is fixed on the cross rod, and the height of the low-frequency vibration machine is adjusted by adjusting the height of the cross rod, so that the arc-shaped rubber pad of the low-frequency vibration mechanism is in contact with the upper surface of the concrete test piece.
10. The device for testing the blockage and maintenance effect of the pervious concrete under the vibration action according to claim 1, wherein the testing device further comprises a vacuum dust collector, and a dust removal probe of the vacuum dust collector extends into the main body testing device to remove dust from the concrete sample in the main body testing device.
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| CN201810035213.6A CN108426819B (en) | 2018-01-15 | 2018-01-15 | Concrete that permeates water under vibration stops up and maintains effect testing arrangement |
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| CN201810035213.6A CN108426819B (en) | 2018-01-15 | 2018-01-15 | Concrete that permeates water under vibration stops up and maintains effect testing arrangement |
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| CN110823783A (en) * | 2019-11-29 | 2020-02-21 | 郑州航空工业管理学院 | Sponge city permeable pavement plug infiltration simulation experiment device |
| CN111879679A (en) * | 2020-08-03 | 2020-11-03 | 安徽工业大学 | Device for simulating permeable concrete pavement blockage and rainwater purification monitoring and using method thereof |
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