Experimental and Numerical Study on Response Characteristics of Airport Pavement Subjected to Wetting in Silt Subgrade

Qiqi Luo; Xinyu Ye; Qiang LiSheng ZhangQian YuXinyan Ma

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Experimental and Numerical Study on Response Characteristics of Airport Pavement Subjected to Wetting in Silt Subgrade

机译：Experimental and Numerical Study on Response Characteristics of Airport Pavement Subjected to Wetting in Silt Subgrade

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Silt is often selected as the filling soil in Northwest and North China. "Pot cover effect" or rainfall infiltration are easily to cause localized wetting during the service period of airport. The response characteristics of pavement derived from aircraft loading under wetting condition are the basis to explore the evolution law of pavement damage. To investigate this response characteristics for different parameters of pavement under wetting condition, a self-developed model test system was developed, and the verified numerical model was then established. The interaction mechanisms of pavement slabs, and the influence of wetting on mechanical response in loading area of pavement under different pavement parameters were analyzed. The results showed that the increased vertical deformation depends on water-holding capacity of silt, and the vertical deformation under loading is little affected by pavement parameters. The peak shear stress and the increased peak shear stress derived from wetting at the bottom of pavement layers are largely influenced by elastic modulus of base course. For cement concrete pavement, the increase in load transfer capacity of joints cannot decrease the increase of peak stress, including horizontal stress and shear stress, derived from wetting. The increase in load transfer capacity of joints can decrease the stress concentration in surface layer, while the elastic modulus of surface layer has little influence. For bituminous pavement, optimal parameters of base course can be obtained to decrease the peak stress and the increase of peak stress derived from wetting in subgrade. The research can provide technical basis for the structure design, optimization, and disease treatment of pavement in airport engineering.

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来源
《KSCE journal of civil engineering》 |2023年第2期|551-566|共16页
作者
Qiqi Luo; Xinyu Ye; Qiang LiSheng ZhangQian YuXinyan Ma;
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作者单位

School of Civil Engineering, Central South University, Changsha 410075, China;

Beijing New Airport Construction Headquarters, Beijing 102600, China;

Dept. of Ceotechnical Engineering, China Airport Planning and Design Institute Co. Ltd., Beijing 100020, China, Observation and Research Base of Transport Industry of Airport Engineering Safety and Long-term Performance, Beijing 100020, China;

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正文语种英语
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关键词
Silt subgrade; Wetting; Pavement parameters; Mechanical response; Sensitivity;

Experimental and Numerical Study on Response Characteristics of Airport Pavement Subjected to Wetting in Silt Subgrade

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