Temperature correction method of pavement construction depth index based on asphalt surface layer equivalent temperature
A technology of pavement structure depth and asphalt surface, which is applied in the direction of thermometers, thermometer parts, thermometers, etc. which are directly sensitive to heat by electrical/magnetic components, which can solve the problems of neglect and inability to compare and evaluate the anti-skid performance of pavement.
Active Publication Date: 2019-09-03
RES INST OF HIGHWAY MINIST OF TRANSPORT
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Problems solved by technology
[0005] In the existing "Highway Subgrade Pavement On-Site Test Regulations", the average value of the three measurement results of the sand-laying method is used as the pavement structure depth, ignoring the influence of temperature on the pavement structure depth, and no temperature correction for the pavement structure depth index. The measurement results at high temperature cannot make accurate comparison and evaluation of the anti-skid performance of the road surface
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[0128] Taking the temperature correction of the structural depth index of SAC13-70 asphalt pavement in a certain project as an example, the specific steps are as follows:
[0129] pavement structure such as figure 1 As shown, the asphalt top layer 1 is 4cm thick, which is the asphalt surface layer in the present invention. Choose to lay temperature sensors at the position of 0cm on the road surface and 4cm on the asphalt surface layer to measure the real-time temperature change of the asphalt surface layer, and choose the daily equivalent temperature of the 4cm pavement surface layer as the reference standard for the temperature correction of the pavement structure depth index.
[0130] Step 1: Embedding of asphalt pavement temperature sensor
[0131] The temperature sensor adopts PT100 platinum resistance temperature sensor, the zero-degree resistance value is 100Ω, and the resistance change rate is 0.3851Ω / ℃. The sensor is composed of a stainless steel tube with a diameter...
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Abstract
The invention relates to a temperature correction method of pavement construction depth index based on asphalt surface layer equivalent temperature. The method comprises the following steps: taking apavement construction depth index as a correction object, proposing an asphalt surface layer equivalent temperature computation method so as to serve the annual equivalent temperature at the pavementstructure asphalt surface layer 4cm in the testing time quantum as the standard temperature and serve the daily equivalent temperature at the pavement structure asphalt surface layer 4cm in the testing time quantum as the correction reference temperature, and correcting the asphalt pavement construction depth index to be less than the standard temperature. According to the temperature correction method of the pavement construction depth index, the temperature correction error can be reduced, the corrected pavement construction depth index more conforms to the actual pavement anti-slipping performance state, and can really reflects the influence on the asphalt pavement construction depth index by the temperature change in four seasons, the slipping resistance contrast of different asphalt pavement structures is realized, a pavement structure is guided to determine the optimal maintenance opportunity, the pavement maintenance cost is saved, and the pavement driving security is improved.
Description
technical field [0001] The invention mainly relates to the field of road surface detection, and mainly relates to a temperature correction method of a road surface structure depth index based on the equivalent temperature of an asphalt surface layer. Background technique [0002] Pavement skid resistance is one of the main factors that determine the quality of asphalt pavement and driving safety, and is an important part of pavement service performance. The structural depth of asphalt pavement is an important index for the evaluation of pavement skid resistance. Therefore, it is of great practical significance to detect and control the pavement structural depth. [0003] The anti-skid performance of asphalt pavement is closely related to the surface morphology, which is mainly determined by the micro-texture structure and macro-texture structure of the pavement. Studies have shown that the micro-structure mainly affects the anti-skid performance of asphalt pavement at low sp...
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IPC IPC(8): G01K7/18G01K1/20G01K1/14G06F17/50G01K1/143
CPCG01K7/18G01K1/20G01K1/14G06F2119/08G06F30/20
Inventor 吴将丰王旭东肖倩张蕾张晨晨周兴业
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT