CN114295673A - Pavement testing system and testing method thereof - Google Patents
Pavement testing system and testing method thereof Download PDFInfo
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- CN114295673A CN114295673A CN202111671246.8A CN202111671246A CN114295673A CN 114295673 A CN114295673 A CN 114295673A CN 202111671246 A CN202111671246 A CN 202111671246A CN 114295673 A CN114295673 A CN 114295673A
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- 238000012360 testing method Methods 0.000 title claims abstract description 52
- 239000004567 concrete Substances 0.000 claims abstract description 43
- 239000004568 cement Substances 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 239000004575 stone Substances 0.000 claims description 41
- 239000002689 soil Substances 0.000 claims description 38
- 238000006073 displacement reaction Methods 0.000 claims description 24
- 238000004891 communication Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- 239000011384 asphalt concrete Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention discloses a pavement testing system and a testing method thereof, wherein the pavement comprises a cement stabilized macadam base layer, a concrete expansion groove and a graded macadam expansion groove, and the pavement testing system comprises: the power module provides power for the data acquisition module and the data transmission module through a system bus; the data acquisition module is used for acquiring stress data and deformation data of the cement stabilized macadam base layer borne by the concrete expansion groove and the graded macadam expansion groove and heat conduction data inside the concrete expansion groove and the graded macadam expansion groove; the data transmission module is connected with the data acquisition module and the client and is used for transmitting the related data acquired by the data acquisition module to the client; and the client is used for analyzing the related data to obtain a road surface test result.
Description
Technical Field
The invention relates to the technical field of highway engineering disaster monitoring, in particular to a pavement testing system and a testing method thereof.
Background
At present, in Jingxin high speed, provincial road S312 and Juda first-class road in inner Mongolia prefecture, the municipal road has a special pavement disease form different from other areas: the transverse arch of the road surface expands, which seriously jeopardizes the traffic safety. Numerous researches find that the road surface arch expansion mainly occurs in the cement stabilized macadam base layer, the cement stabilized macadam base layer is of a semi-rigid plate structure, under the coupling effect of temperature and salinity, the internal structure of the plate body begins to generate expansion stress, the expansion stress cannot be released by the plate body which is longer along the route direction, and finally deformation can be caused.
In order to release the expansion stress generated by the cement stabilized macadam base layer under the action of temperature and sulfate, the expansion-eliminating groove is widely popularized as a disposal measure, the expansion-eliminating groove penetrates through the whole thickness of the cement stabilized macadam base layer, the expansion-eliminating grooves are arranged at certain intervals along the road route direction, the filling materials of the expansion-eliminating grooves are different, the side surfaces of the expansion-eliminating grooves bear the expansion stress of the cement stabilized macadam base layer, the deformation capacity of the expansion-eliminating grooves is different, and the heat conduction capacity of the internal structure of the expansion-eliminating groove from top to bottom is also different.
Disclosure of Invention
The invention aims to provide a pavement testing system and a testing method thereof, and aims to solve the problems of the capability of resisting expansion stress generated by a cement stabilized macadam base layer under the action of temperature and sulfate on the side surfaces of different expansion-eliminating grooves in the existing construction site and the testing capability of the internal structure of the expansion-eliminating groove for heat conduction from top to bottom.
The technical scheme for solving the technical problems is as follows:
the invention provides a pavement testing system, wherein the pavement comprises a cement stabilized macadam base layer, a concrete expansion groove and a graded macadam expansion groove, and the pavement testing system comprises: the power module provides power for the data acquisition module and the data transmission module through a system bus; the data acquisition module is used for acquiring stress data and deformation data of the cement stabilized macadam base layer borne by the concrete expansion groove and the graded macadam expansion groove and heat conduction data inside the concrete expansion groove and the graded macadam expansion groove; the data transmission module is connected with the data acquisition module and the client and is used for transmitting the related data acquired by the data acquisition module to the client; and the client is used for analyzing the related data to obtain a road surface test result.
Optionally, the power module includes a solar panel and a solar battery, the solar panel is configured to acquire solar energy and transmit the acquired solar energy to the solar battery.
Optionally, the data acquisition module includes a plurality of data collectors, an 8-channel data concentrator and a communication data line, an input end of the 8-channel data concentrator is connected to the plurality of data collectors, an output end of the 8-channel data concentrator is connected to the communication data line, the plurality of data collectors are respectively disposed in the graded broken stone base layer, the concrete expansion groove and the graded broken stone expansion groove to obtain original related data of the graded broken stone base layer, the concrete expansion groove and the graded broken stone expansion groove, and the communication data line is configured to process the original related data to generate related data and store the related data.
Optionally, in the graded broken stone expansion tank, the plurality of data collectors include a first displacement meter, a second displacement meter, a first soil pressure box, a second soil pressure box and a third soil pressure box; between the graded broken stone expansion tank and the concrete expansion tank, the plurality of data collectors comprise a third displacement meter and a fourth soil pressure cell; in the concrete expansion tank, the plurality of data collectors comprise a fourth displacement meter, a fifth soil pressure box, a sixth soil pressure box and a seventh soil pressure box; each displacement meter is used for acquiring deformation data, and each soil pressure cell is used for acquiring pressure data.
Optionally, a first thermometer, a second thermometer and a third thermometer are sequentially arranged on the cement stabilized macadam foundation from top to bottom in the vertical direction; a fourth thermometer, a fifth thermometer and a sixth thermometer are sequentially arranged on the concrete expansion tank from top to bottom along the vertical direction; a seventh thermometer, an eighth thermometer and a ninth thermometer are sequentially arranged on the graded broken stone expansion tank from top to bottom in the vertical direction; each of the thermometers is used to obtain temperature data.
Optionally, the number of the 8-channel data concentrator is 3, so as to connect the graded broken stone base layer, the concrete expansion slot and the graded broken stone expansion slot respectively.
The invention also provides a pavement testing method according to the pavement testing system, and the pavement testing method comprises the following steps:
s1: acquiring original related data;
s2: processing the original related data to obtain related data, wherein the related data comprises stress data and deformation data of the concrete expansion groove and the graded broken stone expansion groove bearing the cement stabilized broken stone base layer, and temperature data inside the concrete expansion groove and the graded broken stone expansion groove;
s3: and analyzing the related data to obtain a pavement test result, wherein the pavement test result comprises the heat conduction capacity in the concrete expansion groove and the graded broken stone expansion groove.
Optionally, the heat conductivity is obtained by:
wherein α represents a heat conductivity, t1Indicating the temperature of the thermometer in the upper layer, t2Which indicates the temperature of the thermometer at the lower level and h indicates the distance of the thermometer in the vertical direction.
The invention has the following beneficial effects:
in the past, the shrinkage and expansion deformation of the cement stabilized macadam base layer only depend on the development of an indoor test, the monitoring of the indoor test is influenced by factors such as ambient temperature, sample size and unreasonable operation of testing personnel, and the obtained monitoring data cannot be completely suitable for the field. The method can evaluate the applicability of the expansion tank measures adopted on the road surface arching road section in the Gobi saline soil area through field data, and on the basis, the expansion tank is popularized to provincial areas similar to the geographical and climatic conditions of a research area, and even further popularized to some foreign Gobi saline soil areas, so that the construction capacity of the road surface can be improved.
Drawings
FIG. 1 is a schematic structural diagram of a pavement testing system provided by the present invention;
FIG. 2 is an enlarged view of a portion of the structure of FIG. 1;
FIG. 3 is a schematic view of the arrangement of the thermometers of FIG. 1;
fig. 4 is a flowchart of a road surface testing method provided by the present invention.
1-cement stabilized macadam base; 2-a concrete expansion tank; 3-grading broken stone expansion-eliminating groove; 4-a solar panel; 5-solar storage battery; 6-system bus; 8-communication data line; 11-8 lane data hubs; 15-a first displacement meter; 16-a second displacement meter; 17-a first soil pressure cell; 18-a second soil pressure cell; 19-a third soil pressure cell; 20-a third displacement meter; 21-a fourth soil pressure cell; 22-fourth displacement meter; 23-a fifth displacement gauge; 24-a fifth soil pressure cell; 25-a sixth soil pressure cell; 26-a seventh soil pressure cell; 27-a first thermometer; 28-a second thermometer; 29-a third thermometer; 30-a fourth thermometer; 31-fifth thermometer; 32-a sixth thermometer; 33-a seventh thermometer; 34-an eighth thermometer; 35-ninth thermometer; 36-a data transmission module; 37-GPRS; 38-client.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Examples
The invention provides a pavement testing system, referring to fig. 1, the pavement comprises a cement stabilized macadam base layer 1, a concrete expansion groove 2 and a graded macadam expansion groove 3, the pavement testing system comprises: the power module provides power for the data acquisition module and the data transmission module through a system bus; the data acquisition module is used for acquiring stress data and deformation data of the cement stabilized macadam base layer 1 borne by the concrete expansion groove 2 and the graded macadam expansion groove 3 and heat conduction data inside the concrete expansion groove 2 and the graded macadam expansion groove 3; the data transmission module 36 is connected with the data acquisition module and the client 38, and is used for transmitting the relevant data acquired by the data acquisition module to the client 38; and the client 38 is used for analyzing the related data to obtain a road surface test result.
Specifically, in the invention, the concrete expansion tank 2 is an ATB25 asphalt concrete expansion tank, the distance between the ATB25 asphalt concrete expansion tank and the graded broken stone expansion tank 3 along the road is 200m, and the two expansion tanks are arranged at intervals.
In the present invention, the data transmission module 36 is configured as a wireless acquisition transmission module to send the obtained data of temperature, stress, deformation, etc. to the client via GPRS 37.
Optionally, the power module comprises a solar panel 4 and a solar battery 5, wherein the solar panel 4 is used for acquiring solar energy and transmitting the acquired solar energy to the solar battery 5. Therefore, the power source can be provided for the whole system while the requirement of environmental protection is met as much as possible. Of course, other configurations may be selected by those skilled in the art as a power module, such as, in some embodiments, a power module configured as a power source and/or a motor.
Optionally, the data acquisition module includes a plurality of data collectors, an 8-channel data concentrator 11 and a communication data line 8, an input end of the 8-channel data concentrator 11 is connected to the plurality of data collectors, an output end of the 8-channel data concentrator is connected to the communication data line, the plurality of data collectors are respectively disposed in the graded broken stone base layer, the concrete expansion groove 2 and the graded broken stone expansion groove 3 to obtain original related data of the cement stabilized broken stone base layer 1, the concrete expansion groove 2 and the graded broken stone expansion groove 3, and the communication data line 8 is configured to process the original related data to generate related data and store the related data.
The soil pressure cell and the displacement meter at different positions of the same section can be used for comparing and analyzing the position of the road and the roadside with the highest stress and deformation. The soil pressure cell and the displacement meter at the same position with different sections can be used for comparing and analyzing which expansion-eliminating groove has the strongest deformation resistance. Therefore, optionally, referring to fig. 2, in the graded crushed stone expansion tank 3, the plurality of data collectors include a first displacement meter 15, a second displacement meter 16, a first soil pressure cell 17, a second soil pressure cell 18 and a third soil pressure cell 19; between the graded broken stone expansion tank 3 and the concrete expansion tank 2, a plurality of data collectors comprise a third displacement meter 20 and a fourth soil pressure box 21; in the concrete expansion tank 2, the plurality of data collectors comprise a fourth displacement meter 22, a fifth displacement meter 23, a fifth soil pressure box 24, a sixth soil pressure box 25 and a seventh soil pressure box 26; each displacement meter is used for acquiring deformation data, and each soil pressure cell is used for acquiring pressure data.
Besides, in order to obtain the heat conduction capability inside the concrete expansion groove and the graded broken stone expansion groove, optionally, a first thermometer 27, a second thermometer 28 and a third thermometer 29 are sequentially arranged on the cement stabilized broken stone base layer 1 from top to bottom along the vertical direction; a fourth thermometer 30, a fifth thermometer 31 and a sixth thermometer 32 are sequentially arranged on the concrete expansion tank 2 from top to bottom along the vertical direction; a seventh thermometer 33, an eighth thermometer 34 and a ninth thermometer 35 are sequentially arranged on the graded broken stone expansion tank 3 from top to bottom along the vertical direction; each of the thermometers is used to obtain temperature data.
Thus, it can be obtained by:
wherein α represents a heat conductivity, t1Indicating the temperature of the thermometer in the upper layer, t2Which indicates the temperature of the thermometer at the lower level and h indicates the distance of the thermometer in the vertical direction.
In order to monitor the heat-conducting property of different materials, theoretical guidance can be provided for force and deformation monitoring data. Specifically, referring to fig. 3, the thermometers are installed at positions 5cm, 12.5cm and 20cm from the bottom of the asphalt pavement in the cement stabilized macadam foundation 1, the ATB25 asphalt concrete expansion groove 2 and the graded macadam expansion groove 3; the test range of each thermometer is-40-125 ℃, the precision is 0.1, the test range of the soil pressure cell is 0.5MPa, the precision is 0.01, the test range of the displacement meter is 100mm, and the precision is 0.1.
Because the internal structures of the tested pavement are respectively a cement stabilized macadam base layer 1, a concrete expansion groove 2 and a graded macadam expansion groove 3, optionally, 3 data concentrators 11 with 8 channels are used for respectively connecting the cement stabilized macadam base layer 1, the concrete expansion groove 2 and the graded macadam expansion groove 3.
The present invention also provides a road surface testing method according to the above-mentioned road surface testing system, as shown in fig. 4, the road surface testing method includes:
s1: acquiring original related data;
s2: processing the original related data to obtain related data, wherein the related data comprises stress data and deformation data of the concrete expansion groove 2 and the graded broken stone expansion groove 3 bearing the cement stabilized broken stone base layer 1, and temperature data of the concrete expansion groove 2 and the graded broken stone expansion groove 3;
s3: and analyzing the related data to obtain a pavement test result, wherein the pavement test result comprises the heat conduction capacity inside the concrete expansion groove 2 and the graded broken stone expansion groove 3.
Optionally, the heat conductivity is obtained by:
wherein α represents a heat conductivity, t1Indicating the temperature of the thermometer in the upper layer, t2Which indicates the temperature of the thermometer at the lower level and h indicates the distance of the thermometer in the vertical direction.
In the past, the shrinkage and expansion deformation of the cement stabilized macadam base layer only depend on the development of an indoor test, the monitoring of the indoor test is influenced by factors such as ambient temperature, sample size and unreasonable operation of testing personnel, and the obtained monitoring data cannot be completely suitable for the field. The method can evaluate the applicability of the expansion tank measures adopted on the road surface arching road section in the Gobi saline soil area through field data, and on the basis, the expansion tank is popularized to provincial areas similar to the geographical and climatic conditions of a research area, and even further popularized to some foreign Gobi saline soil areas, so that the construction capacity of the road surface can be improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides a road surface test system which characterized in that, the road surface includes cement stabilized macadam basic unit, concrete expansion groove and gradation rubble expansion groove, road surface test system includes:
the power module provides power for the data acquisition module and the data transmission module through a system bus;
the data acquisition module is used for acquiring stress data and deformation data of the cement stabilized macadam base layer borne by the concrete expansion groove and the graded macadam expansion groove and heat conduction data inside the concrete expansion groove and the graded macadam expansion groove;
the data transmission module is connected with the data acquisition module and the client and is used for transmitting the related data acquired by the data acquisition module to the client; and
and the client is used for analyzing the related data to obtain a road surface test result.
2. The system of claim 1, wherein the power module includes a solar panel and a solar battery, the solar panel being configured to capture solar energy and transmit the captured solar energy to the solar battery.
3. The pavement testing system according to claim 1, wherein the data acquisition module includes a plurality of data collectors, an 8-channel data concentrator and a communication data line, an input end of the 8-channel data concentrator is connected to the plurality of data collectors, an output end of the 8-channel data concentrator is connected to the communication data line, the plurality of data collectors are respectively disposed in the graded broken stone base layer, the concrete expansion groove and the graded broken stone expansion groove to obtain original related data of the graded broken stone base layer, the concrete expansion groove and the graded broken stone expansion groove, and the communication data line is used for processing the original related data to generate related data and storing the related data.
4. The pavement testing system of claim 3,
in the graded broken stone expansion tank, the plurality of data collectors comprise a first displacement meter, a second displacement meter, a first soil pressure box, a second soil pressure box and a third soil pressure box;
between the graded broken stone expansion tank and the concrete expansion tank, the plurality of data collectors comprise a third displacement meter and a fourth soil pressure cell;
in the concrete expansion tank, the plurality of data collectors comprise a fourth displacement meter, a fifth soil pressure box, a sixth soil pressure box and a seventh soil pressure box;
each displacement meter is used for acquiring deformation data, and each soil pressure cell is used for acquiring pressure data.
5. The pavement testing system of claim 4,
a first thermometer, a second thermometer and a third thermometer are sequentially arranged on the cement stabilized macadam foundation from top to bottom in the vertical direction;
a fourth thermometer, a fifth thermometer and a sixth thermometer are sequentially arranged on the concrete expansion tank from top to bottom along the vertical direction;
a seventh thermometer, an eighth thermometer and a ninth thermometer are sequentially arranged on the graded broken stone expansion tank from top to bottom in the vertical direction; each of the thermometers is used to obtain temperature data.
6. A pavement testing system according to any one of claims 3 to 5, wherein the number of said 8-channel data concentrator is 3, for connecting said graded broken stone base, said concrete expansion groove and said graded broken stone expansion groove, respectively.
7. A pavement testing method of the pavement testing system according to any one of claims 1 to 6, characterized by comprising:
s1: acquiring original related data;
s2: processing the original related data to obtain related data, wherein the related data comprises stress data and deformation data of the concrete expansion groove and the graded broken stone expansion groove bearing the cement stabilized broken stone base layer, and temperature data inside the concrete expansion groove and the graded broken stone expansion groove;
s3: and analyzing the related data to obtain a pavement test result, wherein the pavement test result comprises the heat conduction capacity in the concrete expansion groove and the graded broken stone expansion groove.
8. A pavement testing method according to claim 7, characterized in that said thermal conductivity is obtained by:
wherein α represents a heat conductivity, t1Indicating the temperature of the thermometer in the upper layer, t2Which indicates the temperature of the thermometer at the lower level and h indicates the distance of the thermometer in the vertical direction.
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2021
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| CN101696878A (en) * | 2009-10-23 | 2010-04-21 | 山东省交通科学研究所 | Method for detecting stress and strain of road surface |
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