JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2015, Vol. 45 ›› Issue (6): 84-90.doi: 10.6040/j.issn.1672-3961.0.2015.098

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Field test and research on vehicle load induced dynamic pore pressure in asphalt pavement

TANG Weize1, OU Jinqiu2, CUI Xinzhuang1, LOU Junjie1, XIAO Ming1, ZHANG Jiong1, HUANG Dan1, HOU Fei1   

  1. 1. School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China;
    2. China Fortune Land Development Company Limited, Beijing 100027, China
  • Received:2015-04-08 Revised:2015-06-23 Online:2015-12-20 Published:2015-04-08

Abstract: In order to study the influence on moisture damage of asphalt pavement caused by dynamic pore pressure due to moving vehicle loads, and explore the time histories of dynamic stress and dynamic pore pressure in the pavement surface layers, the heat-resistant dynamic stress and pore pressure sensors were developed and used to measure the dynamic stresses and pore pressures in the field, and the field measured data of dynamic pore pressure was acquired. Based on the Biot's consolidation theory, a numerical fluid-solid coupling simulation method reflecting mobile effect of wheel load was used to analyze the response of pavement under the actual condition. The time history of dynamic pore pressure in pavement was quantitatively analyzed. Numerical simulation results matched well with in situ test data. The pump-suction effect of dynamic pore pressure that continuously generated in pavement void under cyclical vehicle loads led to the reduce of the asphalt-aggregate bond strength and further triggered the moisture damage. This study verified the hydraulic drive mechanism of moisture damage, and provided a theoretical guild for the moisture damage research and pavement design.

Key words: field test, asphalt pavement, dynamic pore pressure, numerical simulation, moisture damage

CLC Number: 

  • TU416.217
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