CN112834625A - Lightweight high-density pavement performance detection method - Google Patents
Lightweight high-density pavement performance detection method Download PDFInfo
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- CN112834625A CN112834625A CN202110008150.7A CN202110008150A CN112834625A CN 112834625 A CN112834625 A CN 112834625A CN 202110008150 A CN202110008150 A CN 202110008150A CN 112834625 A CN112834625 A CN 112834625A
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- 238000001514 detection method Methods 0.000 title abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000012360 testing method Methods 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 6
- 239000010426 asphalt Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010998 test method Methods 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
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/12—Analysing solids by measuring frequency or resonance of acoustic waves
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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
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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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
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
- G01N2203/0007—Low frequencies up to 100 Hz
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02818—Density, viscosity
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Abstract
The invention discloses a lightweight high-density pavement performance detection method, which comprises the steps of installing a pavement detector in a to-be-detected area, starting a telescopic device of the pavement detector, driving a knocking hammer to knock the to-be-detected pavement, acquiring and recording knocking sound frequency by an audio collector, and according to the received knocking sound frequency; starting a pressure pump to inject a fixed amount of water into a pressure cylinder, reading and metering the pavement water seepage time, and calculating the pavement water seepage coefficient; starting a high-pressure air pump to fill pressure air into a pressurizing cylinder, observing and detecting whether water seeps from the road surface or not in a time interval, recording the pressure of the pressure air when water seepage occurs, and judging whether the water seepage performance of the road surface is qualified or not; by utilizing the test knocking frequency, the pressurized water penetration test and the pressurized gas penetration test, whether the pavement compactness degree, the structural strength, the pavement water seepage coefficient and the pavement water seepage performance are qualified or not is judged, the test does not damage the road, and the test is convenient and quick.
Description
Technical Field
The invention relates to the technical field of highway engineering, in particular to a lightweight high-density pavement performance detection method.
Background
With the sudden and violent advancement of road construction, the pavement laying range is more and more extensive, the pavement surface structure is a main influence factor for realizing pavement functionality, the safety and the comfort of driving are directly influenced, the pavement surface structure is uniformly distributed and provides enough skid resistance under an ideal state, and particularly, the lightweight high-density pavement not only ensures the structural strength, but also ensures the compactness and the water seepage performance; however, in the actual engineering construction, the influence of road surface materials, construction machinery, surrounding environment and the like can not avoid the conditions of uneven distribution of road surface structures, insufficient structural strength and water seepage performance.
In the conventional method for detecting the structural strength and the permeability of the pavement surface at the present stage, a drilling sampling test method is generally adopted, a drilling machine is adopted to drill and sample the pavement, and a laboratory test is carried out on the sampled sample, so that the phenomena of dead spots, omission, inaccurate detection result and the like easily occur in the sampling process, more manual auxiliary operations are needed, the pavement surface is damaged, and the detection cannot be directly carried out on the pavement surface. Therefore, it is necessary to provide a road surface performance detection method with light weight and high density, aiming at solving the above problems.
Disclosure of Invention
In view of the shortcomings of the prior art, an object of the embodiments of the present invention is to provide a method for detecting road surface performance with light weight and high density, so as to solve the above-mentioned problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for detecting the performance of a lightweight high-density pavement comprises the following steps:
step A, installing a pavement detector in an area to be detected, wherein the pavement detector comprises:
the pressing support comprises a pressing plate, the pressing plate is positioned at the lower part of the pressing support, and a fixing groove is formed in the center of the pressing plate;
the horn-shaped collector is positioned in the fixing groove of the lower pressing plate, and the outer wall of the horn-shaped collector is fixedly connected with the lower pressing plate;
the pressurizing cylinder is positioned above the horn-shaped collector and is fixedly connected with the horn-shaped collector;
the knocking hammer is positioned in the pressurizing cylinder and is arranged on the telescopic device through a hammer handle;
the audio collector is positioned in the pressurizing cylinder and used for collecting the frequency of the knocking sound of the knocking hammer;
the pressurizing pump is positioned on the lower pressing bracket, is communicated with the pressurizing cylinder and is used for pumping water into the pressurizing cylinder;
the high-pressure air pump is positioned on the lower pressing bracket, communicated with the pressurizing cylinder and used for filling pressure air into the pressurizing cylinder;
b, starting a telescopic device of the pavement detector, driving a knocking hammer to knock a pavement to be detected, and acquiring and recording the frequency of knocking sound by an audio collector according to the received frequency of the knocking sound;
c, starting a pressure pump to inject a fixed amount of water into the pressure cylinder, reading and measuring the pavement water seepage time, and calculating the pavement water seepage coefficient;
and D, starting the high-pressure air pump to fill the pressure gas into the pressurizing cylinder, observing and detecting whether water seeps from the road surface or not in a time interval, recording the pressure of the pressure gas when water seepage occurs, and judging whether the water seepage performance of the road surface is qualified or not.
As a further scheme of the invention, the pavement detector is arranged in the area to be detected and comprises the following steps:
a1, fixing the horn-shaped collector on a fixing groove in the center of a lower pressing plate of a lower pressing bracket;
step a2, pressing down the support to fix by using a balancing weight or an engineering machine;
step a3, covering the area to be detected with the bottom port of the horn-shaped collector, and sealing by pouring asphalt at the periphery.
As a further aspect of the present invention, the step of knocking by the knocking hammer of the pavement detector includes:
step b1, driving the knocking hammer to knock the road surface once every 10s by the telescopic device, continuously knocking for 20 times, and increasing the knocking force by 5N each time;
step b2, collecting sound by a horn-shaped collector, and acquiring and recording the frequency of the knocking sound by an audio collector;
and b3, the processor receives the knocking sound frequency data, calculates the comparison curve of the force and the knocking sound frequency, and judges the pavement compactness and the structural strength.
As a further scheme of the present invention, the road surface water seepage testing step of the road surface detector comprises:
step c1, starting the pressure pump to inject a fixed amount of water into the pressure cylinder, and quickly and completely opening the air valve to enable the upper part of the pressure cylinder to be communicated with the outside;
c2, starting timing, and respectively recording the time required by the liquid level to drop to different liquid level heights until the water is completely permeated;
and c3, calculating a permeation contrast curve according to the permeation time and the permeation amount in unit time, and calculating the pavement water seepage coefficient.
As a further aspect of the invention, in step c2, the time is recorded once every 1/5 of the cylinder is lowered and once every 1/3 of the audio collector is lowered.
As a further aspect of the present invention, the pressure gas testing step of the road surface detector includes:
step d1, starting the high-pressure air pump to fill the pressure air into the pressurizing cylinder;
d2, filling pressure gas every 10min, wherein the pressure gas filled in each time is increased by 0.05MPa compared with the pressure gas filled in the previous time, and observing and recording whether the road surface has water seepage or not every time;
and d3, comparing the pressure value of the pressure gas generated by water seepage with 0.15MPa, wherein if the pressure value is less than 0.15MPa, the water seepage performance of the pavement is qualified, and if the pressure value is more than 0.15MPa, the water seepage performance of the pavement is unqualified.
And as a further scheme of the invention, when the knocking hammer knocking test in the step B is carried out, the downward pressing support is fixedly or movably arranged, the knocking hammer performs the knocking test on the same position or continuously knocks in a movable mode, and after the knocking test is finished, the audio collector is fixed and subjected to the water seepage test.
In summary, compared with the prior art, the embodiment of the invention has the following beneficial effects:
according to the lightweight high-density pavement performance detection method, whether the pavement compactness degree, the structural strength, the pavement water seepage coefficient and the pavement water seepage performance are qualified or not is judged by utilizing the test knocking frequency, the pressurized water seepage test and the pressurized gas seepage test, the test does not damage the pavement, and the test is convenient and rapid.
To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a system block diagram of a method for detecting road surface performance with light weight and high density provided by the invention.
Fig. 2 is a schematic structural diagram of a road surface detector in the method for detecting the road surface performance with light weight and high density provided by the invention.
Fig. 3 is a system block diagram before the installation of the road surface detector in the method for detecting the road surface performance with light weight and high density provided by the invention.
Fig. 4 is a block diagram of a system for knocking by a knocking hammer in the lightweight high-density pavement performance detection method provided by the invention.
Fig. 5 is a block diagram of a system for testing road water seepage in the method for testing the performance of a lightweight high-density road provided by the invention.
Fig. 6 is a system block diagram of a pressure gas test in the method for detecting the performance of the lightweight high-density pavement provided by the invention.
Reference numerals: the device comprises a road surface detector 1, a downward pressing bracket 11, a downward pressing plate 110, a fixing groove 111, a horn-shaped collector 12, a pressurizing cylinder 13, a knocking hammer 14, a hammer handle 140, a telescopic device 141, an audio collector 15, a pressurizing pump 16 and a high-pressure air pump 17.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
The technical solution of the present invention is further described with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 6, a method for detecting the performance of a lightweight high-density pavement includes the following steps:
step A, installing a pavement detector 1 in an area to be detected, wherein the pavement detector 1 comprises:
the pressing device comprises a pressing bracket 11, wherein the pressing bracket 11 comprises a pressing plate 110, the pressing plate 110 is positioned at the lower part of the pressing bracket 11, and a fixing groove 111 is formed in the center of the pressing plate 110;
the horn-shaped collector 12 is positioned in the fixing groove 111 of the lower pressing plate 110, and the outer wall of the horn-shaped collector 12 is fixedly connected with the lower pressing plate 110;
the pressurizing cylinder 13 is positioned above the horn-shaped collector 12, and the pressurizing cylinder 13 is fixedly connected with the horn-shaped collector 12;
the knocking hammer 14 is positioned in the pressurizing cylinder 13 and is arranged on the telescopic device 141 through a hammer handle 140;
the audio collector 15 is positioned in the pressurizing cylinder 13 and is used for collecting the knocking sound frequency of the knocking hammer 14;
the pressurizing pump 16 is positioned on the lower pressing bracket 11, communicated with the pressurizing cylinder 13 and used for pumping water into the pressurizing cylinder 13;
the high-pressure air pump 17 is positioned on the lower pressing bracket 11, communicated with the pressurizing cylinder 13 and used for filling pressure air into the pressurizing cylinder 13;
step B, starting the telescopic device 141 of the pavement detector 1, driving the knocking hammer 14 to knock the pavement to be detected, and acquiring and recording the knocking sound frequency by the audio collector 15 according to the received knocking sound frequency;
c, starting a pressure pump 16 to inject a fixed amount of water into the pressure cylinder 13, reading and measuring the pavement water seepage time, and calculating the pavement water seepage coefficient;
and D, starting the high-pressure air pump 17 to fill the pressure air into the pressurizing cylinder 13, observing and detecting whether water seeps from the road surface or not in a time interval, recording the pressure of the pressure air when water seepage occurs, and judging whether the water seepage performance of the road surface is qualified or not.
In the embodiment of the present invention, before the pavement detector 1 is installed in the area to be detected, the method further includes the following steps:
step a1, fixing the horn-shaped collector 12 on the fixing groove 111 at the center of the lower pressing plate 110 of the lower pressing bracket 11;
step a2, pressing down the support 11 by using a counterweight or an engineering machine to apply force to press down and fix;
step a3, covering the area to be detected with the bottom port of the horn collector 12, and sealing by pouring asphalt around the bottom port.
In the embodiment of the present invention, the step of knocking by the knocking hammer 14 of the pavement detector 1 includes:
step b1, driving the knocking hammer 14 to knock the road surface once every 10s by the telescopic device 141, and knocking for 20 times continuously, wherein the knocking force is increased by 5N each time;
step b2, collecting sound by the horn-shaped collector 12, and acquiring and recording the frequency of the knocking sound by the audio collector 15;
and b3, the processor receives the knocking sound frequency data, calculates the comparison curve of the force and the knocking sound frequency, and judges the pavement compactness and the structural strength.
In the embodiment of the present invention, the road surface water seepage testing step of the road surface detector 1 includes:
step c1, starting the pressure pump 16 to inject a fixed amount of water into the pressure cylinder 13, and rapidly and completely opening the air valve to enable the upper part of the pressure cylinder 13 to be communicated with the outside;
c2, starting timing, and respectively recording the time required by the liquid level to drop to different liquid level heights until the water is completely permeated;
and c3, calculating a permeation contrast curve according to the permeation time and the permeation amount in unit time, and calculating the pavement water seepage coefficient.
In step c2, the time is recorded once each time the fluid level drops 1/5 of the pressurizing cartridge 13 and once each time the audio collector 15 drops 1/3.
As a further aspect of the present invention, the pressure gas testing step of the road surface detector 1 includes:
step d1, starting the high-pressure air pump 17 to fill the pressure air into the pressurizing cylinder 13;
d2, filling pressure gas every 10min, wherein the pressure gas filled in each time is increased by 0.05MPa compared with the pressure gas filled in the previous time, and observing and recording whether the road surface has water seepage or not every time;
and d3, comparing the pressure value of the pressure gas generated by water seepage with 0.15MPa, wherein if the pressure value is less than 0.15MPa, the water seepage performance of the pavement is qualified, and if the pressure value is more than 0.15MPa, the water seepage performance of the pavement is unqualified.
In the embodiment of the invention, when the knocking hammer 14 in the step B is used for the knocking test, the pressing bracket 11 is fixedly or movably arranged, the knocking hammer 14 performs the knocking test or continuously performs the moving knocking test on the same position, and after the knocking test is finished, the audio collector 15 is fixed and the water seepage test is performed.
According to the lightweight high-density pavement performance detection method, whether the pavement compactness degree, the structural strength, the pavement water seepage coefficient and the pavement water seepage performance are qualified or not is judged by utilizing the test knocking frequency, the pressurized water seepage test and the pressurized gas seepage test, the test does not damage the pavement, and the test is convenient and rapid.
The technical principle of the present invention has been described above with reference to specific embodiments, which are merely preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. Other embodiments of the invention will occur to those skilled in the art without the exercise of inventive faculty, and such will fall within the scope of the invention.
Claims (7)
1. A method for detecting the performance of a lightweight high-density pavement is characterized by comprising the following steps:
step A, installing a pavement detector in an area to be detected, wherein the pavement detector comprises:
the pressing support comprises a pressing plate, the pressing plate is positioned at the lower part of the pressing support, and a fixing groove is formed in the center of the pressing plate;
the horn-shaped collector is positioned in the fixing groove of the lower pressing plate, and the outer wall of the horn-shaped collector is fixedly connected with the lower pressing plate;
the pressurizing cylinder is positioned above the horn-shaped collector and is fixedly connected with the horn-shaped collector;
the knocking hammer is positioned in the pressurizing cylinder and is arranged on the telescopic device through a hammer handle;
the audio collector is positioned in the pressurizing cylinder and used for collecting the frequency of the knocking sound of the knocking hammer;
the pressurizing pump is positioned on the lower pressing bracket, is communicated with the pressurizing cylinder and is used for pumping water into the pressurizing cylinder;
the high-pressure air pump is positioned on the lower pressing bracket, communicated with the pressurizing cylinder and used for filling pressure air into the pressurizing cylinder;
b, starting a telescopic device of the pavement detector, driving a knocking hammer to knock a pavement to be detected, and acquiring and recording the frequency of knocking sound by an audio collector according to the received frequency of the knocking sound;
c, starting a pressure pump to inject a fixed amount of water into the pressure cylinder, reading and measuring the pavement water seepage time, and calculating the pavement water seepage coefficient;
and D, starting the high-pressure air pump to fill the pressure gas into the pressurizing cylinder, observing and detecting whether water seeps from the road surface or not in a time interval, recording the pressure of the pressure gas when water seepage occurs, and judging whether the water seepage performance of the road surface is qualified or not.
2. The method for detecting the performance of the lightweight high-density pavement according to claim 1, wherein the pavement detector is further arranged before the pavement detector is installed in the area to be detected, and comprises the following steps:
a1, fixing the horn-shaped collector on a fixing groove in the center of a lower pressing plate of a lower pressing bracket;
step a2, pressing down the support to fix by using a balancing weight or an engineering machine;
step a3, covering the area to be detected with the bottom port of the horn-shaped collector, and sealing by pouring asphalt at the periphery.
3. The method for detecting the performance of a lightweight high-density road surface according to claim 1, wherein the step of knocking by a knocking hammer of the road surface detector includes:
step b1, the telescopic device drives the knocking hammer to knock the road surface once every 10s for 20 times,
the knocking force is increased by 5N each time;
step b2, collecting sound by a horn-shaped collector, and acquiring and recording the frequency of the knocking sound by an audio collector;
and b3, the processor receives the knocking sound frequency data, calculates the comparison curve of the force and the knocking sound frequency, and judges the pavement compactness and the structural strength.
4. The method for testing the performance of a lightweight high-density pavement according to claim 1, wherein the pavement testing machine comprises the pavement water seepage testing step of:
step c1, starting the pressure pump to inject a fixed amount of water into the pressure cylinder, and quickly and completely opening the air valve to enable the upper part of the pressure cylinder to be communicated with the outside;
c2, starting timing, and respectively recording the time required by the liquid level to drop to different liquid level heights until the water is completely permeated;
and c3, calculating a permeation contrast curve according to the permeation time and the permeation amount in unit time, and calculating the pavement water seepage coefficient.
5. The method for testing the performance of a lightweight high-density pavement according to claim 4, wherein in step c2, the time is recorded once for 1/5 of the cylinder and once for 1/3 of the audio collector.
6. The method for testing the performance of a lightweight, high-density pavement according to claim 1, wherein the step of testing the pavement tester with pressurized gas comprises:
step d1, starting the high-pressure air pump to fill the pressure air into the pressurizing cylinder;
d2, filling pressure gas every 10min, wherein the pressure gas filled in each time is increased by 0.05MPa compared with the pressure gas filled in the previous time, and observing and recording whether the road surface has water seepage or not every time;
and d3, comparing the pressure value of the pressure gas generated by water seepage with 0.15MPa, wherein if the pressure value is less than 0.15MPa, the water seepage performance of the pavement is qualified, and if the pressure value is more than 0.15MPa, the water seepage performance of the pavement is unqualified.
7. The method for detecting the performance of the lightweight high-density pavement according to claim 1, wherein the hold-down bracket is fixedly or movably arranged during the knocking test of the knocking hammer in the step B, the knocking hammer performs the knocking test or continuously performs the moving knocking test on the same position, and after the knocking test is finished, the audio collector is fixed and the water seepage test is performed.
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