Application Error of Traffic Speed Deflectometer for Asphalt Pavement Structure with Semi-Rigid Base

WU Chaoyang; JIANG Xin

doi:10.3969/j.issn.0258-2724.20200247

Volume 56 Issue 5

Oct. 2021

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Journal of Southwest Jiaotong University > 2021 > 56(5): 1109-1115.

WU Chaoyang, JIANG Xin. Application Error of Traffic Speed Deflectometer for Asphalt Pavement Structure with Semi-Rigid Base[J]. Journal of Southwest Jiaotong University, 2021, 56(5): 1109-1115. doi: 10.3969/j.issn.0258-2724.20200247

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WU Chaoyang, JIANG Xin. Application Error of Traffic Speed Deflectometer for Asphalt Pavement Structure with Semi-Rigid Base[J]. Journal of Southwest Jiaotong University, 2021, 56(5): 1109-1115. doi: 10.3969/j.issn.0258-2724.20200247

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Application Error of Traffic Speed Deflectometer for Asphalt Pavement Structure with Semi-Rigid Base

doi: 10.3969/j.issn.0258-2724.20200247

WU Chaoyang^{1,2,3
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JIANG Xin^{1,2,3
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Received Date: 06 May 2020
Rev Recd Date: 10 Aug 2020

Available Online: 25 Aug 2020

Publish Date: 15 Oct 2021

Abstract

Abstract

In order to evaluate the applicability of traffic speed deflectometer (TSD) in asphalt pavement structure with semi-rigid base, the 2.5D finite element method is employed to establish a numerical model subjected to the moving load of TSD. Firstly, the reliability of the 2.5D finite element program is verified with two previous published results. Then, the deflection slope curves of the conventional, full-depth and semi-rigid base asphalt pavement structure are studied and compared with each other, and their characteristics are summarized. Finally, the applicability error of TSD for asphalt pavement structure with semi-rigid base is examined. Results show that there are multiple peak points in the deflection slope curve of asphalt pavement with semi-rigid base. When TSD is applied to typical asphalt pavement structure with semi-rigid base, deflection test error caused by reference sensor error is as high as 87.3% while the reference sensor reading is not 0. In order to achieve accuracy result, the length of rigid beam of TSD is proposed to be extended to 8.0 m.
- traffic speed deflectometer,
- deflection slope,
- asphalt pavement structure with semi-rigid base,
- test error

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References(17)

References

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1. 高文堃，童晓莹，程怀磊. 基于TSD的沥青路面结构性能评价方法研究. 上海公路. 2023(01): 1-7+179 .
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Application Error of Traffic Speed Deflectometer for Asphalt Pavement Structure with Semi-Rigid Base

doi: 10.3969/j.issn.0258-2724.20200247

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Application Error of Traffic Speed Deflectometer for Asphalt Pavement Structure with Semi-Rigid Base

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