CN216926493U - Road surface water seepage coefficient's survey device - Google Patents
Road surface water seepage coefficient's survey device Download PDFInfo
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- CN216926493U CN216926493U CN202220062458.XU CN202220062458U CN216926493U CN 216926493 U CN216926493 U CN 216926493U CN 202220062458 U CN202220062458 U CN 202220062458U CN 216926493 U CN216926493 U CN 216926493U
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Abstract
The utility model relates to a road maintenance device, in particular to a device for measuring the water permeability coefficient of a road surface, which comprises: a trailer mounted with test tires; a wireless air pressure sensor is arranged on the detection tire; the wireless air pressure sensor is used for measuring the air pressure when the detection tire is in contact with the road surface; the wireless air pressure sensor is connected with the data analysis system. The device for measuring the water seepage coefficient of the pavement can be used for rapidly detecting the water seepage performance of the pavement of various road surface layers such as drainage asphalt pavement in a large area.
Description
Technical Field
The utility model relates to the field of road maintenance devices, in particular to a device for measuring the water permeability coefficient of a road surface.
Background
In the field of road engineering, how to improve the service function of a road surface and how to provide high-safety, more comfortable and more environment-friendly road surface characteristics (road surface characteristics) to the society has become a new pursued object. The drainage asphalt pavement with the large-gap characteristic has the outstanding advantages of high skid resistance, low noise, water mist inhibition, water drift prevention, glare reduction and the like, achieves the top pavement performance in the prior asphalt pavement technology, and becomes a pavement form for realizing the leap of the surface characteristic quality of the road. The drainage pavement is explored and tried for more than ten years, and the popularization and application stage is entered at present. However, as the drainage pavement is built and used, the permeability to water gradually decreases, and the degree of the decrease varies greatly according to different positions.
At present, a field detection method of the water permeability coefficient of the asphalt concrete pavement adopts a T0971-2008 asphalt pavement water permeability coefficient test method in JTG E60-2008 'Highway subgrade pavement field test regulations'. The method for detecting the water permeability coefficient of the indoor asphalt mixture adopts JTG E20-2011 test specification of road engineering asphalt and asphalt mixtureT0730-2011 asphalt mixture water seepage test method. The test principle, test steps and instruments of the two detection methods are the same. The test method for the water seepage coefficient of the asphalt mixture adopts a pavement water seepage instrument, the upper part of the main structure of the test method is an organic glass measuring cylinder marked with volume scales, the measuring cylinder is communicated with a base through a thin tube and is provided with a valve, and the specifications of the diameter of the measuring cylinder, the diameter of the thin tube and the inner and outer diameters of the base have clear requirements. During the test, the base and the road surface are sealed by a sealing material, so that water is prevented from leaking from the base. The water seepage coefficient test method comprises the steps of recording the time for the water surface to descend from a 100mL scale mark to a 500mL scale mark, calculating the water seepage coefficient according to the relation between the amount of water seeping into the pavement in a measuring cylinder and the time, and finally converting the water seepage coefficient into the amount of water passing through the water seepage area of the bottom surface of the pavement water seepage instrument within 1min, wherein the unit is mL/min. The calculation formula is as follows: cW＝V2-V1/t2-t1. In the formula: cWThe water seepage coefficient of the pavement is ml/min; v1To start the graduated cylinder scale, ml, typically 100m L; v2The scale ml of the measuring cylinder when the timing is stopped is usually 500 ml; t is t1Time to start timing, s; t is t2Time to stop timing, s. When the test starts, a tester visually inspects the water level scale, opens a water valve switch and synchronously starts a stopwatch to time; when the test is finished, the tester visually inspects the water level scale and closes the water valve switch to synchronously stop the timing of the stopwatch. In actual operation, because the hands and eyes of a person need reaction time, timing errors of about 1s exist between the water valve opening and closing and the second starting and stopping operations of the meter 2, and the timing errors are difficult to avoid. The existing detection methods are point measurement methods, the measurement procedures are complex, and the measured data can only represent the water seepage coefficient of the detected point position, so that the integral water seepage performance of the road cannot be represented.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the device for measuring the water seepage coefficient of the pavement can be used for rapidly detecting the water seepage performance of the pavement of various road surface layers such as drainage asphalt pavement in a large area.
Specifically, the present invention provides an apparatus for measuring road surface water permeability, comprising: the method comprises the following steps: a trailer fitted with inspection tires 5; a wireless air pressure sensor 4 is arranged on the detection tire 5; the wireless air pressure sensor 4 is used for measuring the air pressure when a pressure measuring port of the detection tire 5 is in contact with the road surface; the wireless air pressure sensor 4 is connected with a data analysis system. The device for measuring the water seepage coefficient of the pavement can be used for rapidly detecting the water seepage performance of the pavement of various road surface layers such as drainage asphalt pavement in a large area.
According to the device for measuring the road water permeability coefficient provided by the utility model, the detection tire 5 is arranged on the measuring device through the independent suspension system 2.
According to the device for measuring the road surface water permeability coefficient, the detection tire 5 is a solid detection special tire; the surface of the detection tyre (5) is free of patterns.
According to the device for measuring the road surface water permeability coefficient, the pressure measuring port is arranged on the surface of the detection tire 5, and the wireless air pressure sensor 4 is arranged in the pressure measuring port.
According to the device for measuring the road surface water seepage coefficient, the number of the detection tires 5 is 2-6; each detection tyre 5 is provided with at least one wireless air pressure sensor 4.
According to the device for measuring the road surface water permeability coefficient provided by the utility model, the number of the detection tires 5 is 4.
According to the device for measuring the road surface water permeability coefficient, 2-4 wireless air pressure sensors 4 are arranged on each detection tire 5.
According to the device for measuring the road surface water permeability coefficient, the diameter of the detection tire 5 is 60-120 cm.
According to the device for measuring the road surface water permeability coefficient, the width of the tire 5 is 140-200 mm; the pressure measuring port arranged on the surface of the detection tire 5 is preferably 5-10 cm long, 3-5 cm wide and 3-5 cm deep.
The device for measuring the road surface water permeability coefficient further comprises a trailer hook 1 and a trailer counterweight system 3; the trailer hook 1 is used for being connected with a traction vehicle, and the trailer counterweight system 3 is arranged on the trailer.
The device for measuring the road surface water seepage coefficient further comprises a speed sensor and a distance sensor which are arranged on the trailer.
According to the utility model, the framework of the measuring device adopts the enclosing plate of the metal shell, the data of the wireless air pressure sensor, the speed sensor and the distance sensor are sent to the data receiving device, the data receiving device is connected to the data analyzer through a data line or wirelessly, and the data analyzer is held by hand or fixed in a traction vehicle.
The utility model also provides a method for measuring the road surface water permeability coefficient, which comprises a device for measuring the road surface water permeability coefficient.
According to the method for measuring the road surface water permeability coefficient, provided by the utility model, the measuring method comprises the following steps:
1) performing off-site calibration, namely testing a calibration road section by using the measuring device to obtain air pressure and obtaining an average value of the air pressure in the road section to be tested under the test vehicle speed;
2) indoor calibration, namely connecting an air compressor with a sealing box, fixing the sealing box on the surface of a rut plate test piece with the water seepage coefficient of 0, and adjusting the power through the air compressor to enable the air pressure in the sealing box to reach the average value of the air pressure so as to obtain the power of the air compressor; taking down the sealing box, and respectively measuring the rut plate test pieces with different water seepage coefficients under the power of the air compressor to obtain test air pressure; obtaining a pressure-water permeability coefficient curve according to the value of the tested pressure and water permeability coefficient;
3) performing on-site detection, namely testing the road section to be tested by adopting the measuring device under the test vehicle speed to obtain the air pressure of the road section to be tested;
4) and data processing, namely obtaining the water seepage coefficient of the road section to be detected according to the acquired air pressure of the road section to be detected and the air pressure-water seepage coefficient curve.
The method for measuring the road surface water permeability coefficient provided by the utility model comprises the following steps:
1) off-site calibration
Connecting the measuring device to a traction vehicle, selecting a road section of 50-100 m from a road section to be measured as a calibration road section, preferably selecting the calibration road section with a smaller water seepage coefficient or a compact water seepage-free road section, and detecting the water seepage coefficient of the calibration road section by using a water seepage instrument in advance; the method comprises the steps of enabling a traction vehicle to pass through a calibration road section by a speed uniform speed zone measuring device with the speed of 20-40 km/h, preferably 30km/h, 40-50 km/h, preferably 45km/h and 50-70 km/h, preferably 60km/h, to obtain air pressure, taking the instantaneous maximum value of the air pressure as a calculated pressure value, and calculating the average value P of the air pressure in the road section to be measured at different speeds30、P45、P60；
2) Indoor calibration
Connecting an air compressor with a sealing box; measuring a rut plate test piece with a known water seepage coefficient; preferably, the number of the rut plate test pieces is encrypted within the estimated target water seepage coefficient range, the number of the rut plate test pieces with different water seepage coefficients is more than or equal to 5, the sealing box is fixed on the surface of the rut plate test piece with the water seepage coefficient of 0, and the air pressure in the sealing box is respectively up to P through adjusting the power of the air compressor30、P45、P60Recording the power W of the air compressor at each air pressure30、W45、W60；
Taking off the sealing box, and controlling the power W of the air compressor30、W45、W60Measuring the rut plate test pieces with different water seepage coefficients to obtain the test air pressure of each rut plate test piece; drawing an air pressure-water permeability coefficient curve according to the values of the test air pressure and the water permeability coefficient to respectively obtain C30、C45、C60Three air pressure-water permeability coefficient curves using CvExpressed as f (x);
3) in situ test
Connecting the measuring device with a traction vehicle, determining the detected speed (selected from 30km/h, 45km/h and 60 km/h) according to the length of the detected road section and the traffic volume condition, and enabling the vehicle to run on the road section to be detected at a constant speed to obtain air pressure data;
4) data processing
Processing and analyzing the acquired air pressure dataDefining one single cycle of the vehicle tyre, and storing the information including the maximum value T of the average tyre pressure of four pressure sensors after the ith single cycle of the jth tyrejPiDistance m traveled by the vehicleiTime t of the ith single cycleiWheel diameter d and test vehicle speed VtFor known parameters, m is distance from the test originiWater permeability coefficient at distance CmiThe calculation formula of (2) is as follows:
Cmi＝f(Pmi)
in the formula: pmiFor distance testing origin miAverage pressure at distance;
αtis a temperature correction coefficient.
The utility model also provides the application of the device or the method for measuring the water permeability coefficient of the pavement in the large-range rapid detection of the gap connectivity and the water permeability coefficient of the pavement-preferred large-pore drainage asphalt concrete pavement.
The utility model has the beneficial effects that: the device for rapidly measuring the water seepage performance of the road surface in a large area can rapidly detect the water seepage performance of various road surface layers. The method can reduce human errors, has simple measurement procedures, characterizes the integral water seepage performance of the road, and can quickly, widely and accurately measure the water seepage coefficient of the drainage type asphalt pavement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of an apparatus for measuring a road surface water permeability coefficient according to an embodiment of the present invention.
FIG. 2 is a schematic view of a solid tire in the apparatus for measuring a road surface water permeability coefficient according to the embodiment of the present invention.
Wherein, 1-tow hook; 2-independent suspension system; 3-trailer counterweight system; 4-wireless air pressure sensor; 5-detecting the tire.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention. The examples do not show the specific techniques or conditions, according to the technical or conditions described in the literature in the field, or according to the product specifications. The reagents or instruments used are conventional products available from regular distributors, not indicated by the manufacturer.
According to the method for measuring the road surface water permeability coefficient provided by the preferred embodiment of the utility model, the method comprises the following steps:
1) off-site calibration
Connecting the measuring device to a traction vehicle, selecting a road section of 50-100 m from a road section to be measured as a calibration road section, preferably selecting the calibration road section with a smaller water seepage coefficient or a compact water seepage-free road section, and detecting the water seepage coefficient of the calibration road section by using a water seepage instrument in advance; the method comprises the steps of enabling a traction vehicle to pass through a calibration road section by a speed uniform speed zone measuring device with the speed of 20-40 km/h, preferably 30km/h, 40-50 km/h, preferably 45km/h and 50-70 km/h, preferably 60km/h, to obtain air pressure, taking the instantaneous maximum value of the air pressure as a calculated pressure value, and calculating the average value P of the air pressure in the road section to be measured at different speeds30、P45、P60；
2) Indoor calibration
Connecting an air compressor with a sealing box; measuring a rut plate test piece with a known water seepage coefficient; preferably, the number of the rut plate test pieces is encrypted within the estimated target water seepage coefficient range, the number of the rut plate test pieces with different water seepage coefficients is more than or equal to 5,fixing the sealing box on the surface of a rut plate test piece with the water seepage coefficient of 0, and adjusting the power through an air compressor to ensure that the air pressure in the sealing box respectively reaches P30、P45、P60Recording the power W of the air compressor at each air pressure30、W45、W60；
Taking off the sealing box, and controlling the power W of the air compressor30、W45、W60Measuring the rut plate test pieces with different water seepage coefficients to obtain the test air pressure of each rut plate test piece; drawing a pressure-water permeability coefficient curve according to the values of the tested pressure and the water permeability coefficient to respectively obtain three pressure-water permeability coefficient curves, wherein the water permeability coefficient is C30、C45、C60Curve CvF (x), where x is the air pressure at the vehicle speed v;
3) in situ test
Connecting the measuring device with a traction vehicle, determining the detection speed (selected from 30km/h, 45km/h and 60 km/h) according to the length of the detection road section and the traffic volume condition, and enabling the vehicle to run on the road section to be detected at a constant speed to obtain air pressure data;
4) data processing
The acquired air pressure data is processed and analyzed, a vehicle tire is defined to rotate for one circle to be a single cycle, and the stored information comprises the average maximum value T of the air pressure of four pressure sensors after the ith single cycle of the jth tirejPiDistance m traveled by the vehicleiTime t of the ith single cycleiWheel diameter d and selected test vehicle speed VtFor known parameters, m is measured from the test originiWater permeability coefficient C at distancemiThe calculation formula of (2) is as follows:
Cmi＝f(Pmi)
in the formula: pmiFor distance testing origin miAverage pressure at distance;
αtis a temperature correction coefficient.
Example 1
The present embodiment provides a device for measuring road surface water permeability coefficient (as shown in fig. 1 and 2), comprising: the trailer hook 1 is arranged on the trailer and used for being connected with a towing vehicle; the independent suspension system 2 is arranged below the trailer, and the detection tire 5 is connected with the independent suspension system 2; the detection tyre 5 is a solid detection special tyre with no pattern on the surface, the surface of the detection tyre 5 is provided with a pressure measuring port, and the wireless air pressure sensor 4 is arranged in the pressure measuring port; the trailer is also provided with a trailer counterweight system 3, a speed sensor and a distance sensor; the wireless air pressure sensor 4 is connected with a data analysis system; the number of the detection tires 5 is 4; each detection tire 5 is provided with 4 wireless air pressure sensors 4; detecting that the diameter of the tire 5 is 100cm and the width of the tire is 180 mm; the pressure measuring ports arranged on the surface of the detection tire 5 are 6cm long, 4cm wide and 4cm deep.
The embodiment also provides a method for rapidly determining the road surface water permeability coefficient, which comprises the following steps:
(1) off-site calibration
Detecting a measuring device on a 50m waterproof asphalt pavement by a tractor, wherein the diameter of a tire used by the measuring device is 200cm, the tire passes through a calibration road section for 8 cycles, and each tire respectively obtains 32P30、P45、P60The peak data of (a) is shown in the following table:
TABLE 1 off-site calibration detection structure
By calculating the average of 4 tires, P30 was 105.4kPa, P40 was 237.27kPa, and P60 was 400.08 kPa.
(2) Indoor calibration
In the embodiment, a Rodi Z-1500 series air compressor is adopted, the air compressor is connected with a sealing box, and a test is carried out on a track plate with a water permeability coefficient of 0, so that the power of the air compressor is 3.3kW, 7.46kW and 12.58kW when the pressure is 105.4kPa, 237.27kPa and 400.08kPa respectively. The method comprises the following steps of preparing rutting plate test pieces with water seepage coefficients of 523ml/min, 1155ml/min, 1870ml/min, 3680ml/min and 5478ml/min by adjusting mineral aggregate gradation, and testing the rutting plates by using an air compressor of 3.3kW, 7.46kW and 12.58kW respectively to obtain the following results:
TABLE 2 indoor calibration test results
(3) In situ test
The measuring device is adopted for field detection, the field detection area of the embodiment selects a south-three-ring drainage road surface test road section in Shijiazhuang city of Hebei province, the length of the detection road section is 3km, the detection road section is divided into three sections S1, S2 and S3 for detection, the length of each section is 1km, the detection speed is respectively 30km/h, 45km/h and 60km/h, the detection section in each kilometer takes an average air pressure value of 50m as a detection unit, and the obtained data are shown in the following table:
TABLE 3 results of the in-situ test
(4) Data processing
The water permeability coefficient of each unit of each section can be obtained by corresponding the data with a fitting equation and substituting the data into the equation, and the following table shows that:
TABLE 3 data processing results
The embodiment also provides an accuracy evaluation method of the pavement water permeability coefficient rapid determination method, which comprises the following steps:
adopting a water seepage instrument to retest the water seepage coefficient of the tested road section, selecting retesting positions as U5, U7, U11 and U18 units of S1 section, U3, U6, U9 and U12 units of S2 section, and U4, U7, U10 and U13 units of S3 section, and retesting results are shown in the following table:
TABLE 3 retest results
Through above-mentioned contrast test result, can find out that the infiltration coefficient that adopts this device test is less with traditional detecting instrument testing result difference, and this equipment detects the accuracy height.
Although the utility model has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.
Claims (10)
1. A road surface water permeability coefficient measuring device is characterized by comprising: a trailer fitted with inspection tyres (5); a wireless air pressure sensor (4) is arranged on the detection tyre (5); the wireless air pressure sensor (4) is used for measuring the air pressure when a pressure measuring port of the detection tire (5) is in contact with the road surface; the wireless air pressure sensor (4) is connected with a data analysis system.
2. The device for determining the road water permeability coefficient of claim 1, wherein the test tire (5) is mounted on the device by means of an independent suspension system (2).
3. The apparatus for determining road surface water permeability coefficient according to claim 1, wherein the test tire (5) is a solid test-dedicated tire; the surface of the detection tyre (5) is free of patterns.
4. The device for determining the road surface water permeability coefficient according to claim 3, wherein the pressure measuring port is provided on the surface of the detection tire (5), and the wireless air pressure sensor (4) is provided in the pressure measuring port.
5. The device for determining the road surface water permeability coefficient according to claim 4, wherein the number of the detection tires (5) is 2-6; each detection tyre (5) is provided with at least one wireless air pressure sensor (4).
6. The device for determining the road surface water permeability coefficient according to claim 5, wherein the number of the test tires (5) is 4.
7. The device for determining the road surface water permeability coefficient of claim 6, wherein each of the detection tires (5) is provided with 2-4 wireless air pressure sensors (4).
8. The device for determining the road surface water permeability coefficient of claim 7, wherein the diameter of the detection tire (5) is 60-120 cm.
9. The apparatus for determining the road permeability coefficient of any one of claims 1 to 8, further comprising a trailer coupler (1) and a trailer counterweight system (3); the trailer is characterized in that the trailer hook (1) is used for being connected with a traction vehicle, and the trailer counterweight system (3) is arranged on the trailer.
10. The apparatus for determining road water permeability according to any one of claims 1 to 8, further comprising a speed sensor and a distance sensor provided on the trailer.
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| CN202220062458.XU CN216926493U (en) | 2022-01-11 | 2022-01-11 | Road surface water seepage coefficient's survey device |
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| CN202220062458.XU CN216926493U (en) | 2022-01-11 | 2022-01-11 | Road surface water seepage coefficient's survey device |
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