Rock and Soil Mechanics ›› 2023, Vol. 44 ›› Issue (S1): 678-686.doi: 10.16285/j.rsm.2022.1048

• Numerical Analysis • Previous Articles     Next Articles

Vibration response of pavement surface considering unsaturated subgrade performance deterioration

ZHANG Jing1, 2, YANG Ji-hong3, LU Zheng1, 4, TANG Chu-xuan1, 2, LIU Jie5   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China; 3. Hubei Jiaotou Wutian Expressway Co. Ltd., Tianmen, Hubei 431701, China; 4. Hubei Key Laboratory of Geo-Environmental Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 5. Xinjiang Transportation Planning Survey and Design Institute Co., Ltd., Urumqi, Xinjiang 830006, China
  • Received:2022-07-15 Accepted:2022-09-21 Online:2023-11-16 Published:2023-11-21
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (42077261, 42077262).

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Abstract: A vibration response calculation model of elastic layered pavement under the falling weight deflectometer (FWD) load considering the unsaturated characteristics of the subgrade is established to provide the theoretical basis for accurately identifying subgrade performance deterioration by using FWD. The dynamic governing equations of the model are derived and solved by Laplace-Hankel transformation, and the dynamic stiffness matrices of the pavement and unsaturated subgrade are established. The global dynamic stiffness matrix of the highway structure is synthesized from the interlayer continuity condition, and the vibration response solution of the entire highway structure in the transform domain under the FWD load is derived by combining the boundary conditions. The Laplace-Hankel inverse transform is utilized to obtain the numerical solution of the vibration response in the space-time domain. The effects of FWD load frequency and subgrade saturation on the vibration response and the correlation between subgrade performance deterioration and pavement surface vibration signals under FWD load are analyzed. It is found that the vertical dynamic displacement of the pavement surface is mainly influenced by the low frequency component of FWD load and increases with the increase of saturation. The vertical dynamic displacement of the pavement surface is more sensitive to subgrade performance deterioration than the vibration velocity of the pavement surface and the vertical dynamic stress of the subgrade surface. Moreover, the change rate of vertical dynamic displacement of the pavement surface at 1.2 m from the load center reaches the maximum. The results of the study can provide a scientific basis for selecting feedback indicators and locations of subgrade performance deterioration.

Key words: FWD, unsaturated subgrade, resilient modulus, displacement response, subgrade deterioration

CLC Number: 

  • TU 435
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[4] YANG Gui, SUN Xin, WANG Yang-yang, . Tests on resilient behaviour of polymer rockfill materials [J]. , 2018, 39(5): 1669-1674.
[5] QIAN Jin-song, LI Jia-yang, ZHOU Ding, LING Jian-ming. Prediction model of resilient modulus for unsaturated clay soils considering the effect of matric suction [J]. , 2018, 39(1): 123-128.
[6] LIU Guo-huan , LIAN Ji-jian , WANG Hong-zhen , YU Tong-shun，. A practical method for applying the hydrodynamically induced mass and the sensitivity analysis of the ground-bucket foundation-tower system [J]. , 2016, 37(3): 767-775.
[7] WAN Liang-peng , TANG Kai-yu , LI Jian-lin , CAO Yi , HU Jing,. Supporting effect analysis of deep weak rock mass replacement for rock slope [J]. , 2015, 36(S1): 476-480.
[8] LI Zhi-yong ，DONG Cheng ，ZOU Jing-rong ，ZOU Wei-lie,. Research on experiment and prediction model of dynamic resilient modulus of laterite soil in Southern Hunan [J]. , 2015, 36(7): 1840-1846.
[9] NING Xia-yuan ，DONG Cheng ，LI Zhi-yong ，LUO Wei-hua ，MEI Zuo-zhou ，LENG Wu-ming，. A FEM-based method to implement the model of dynamic resilient modulus [J]. , 2015, 36(4): 1182-1188.
[10] TAN Yun-zhi ，YU Bo ，DAI Guang-bo ，WANG Le-hua ，FU Wei,. Determination method for maximum size of sericite schist particles as subgrade fills [J]. , 2015, 36(1): 137-142.
[11] HU You-chang ，SHEN Jun-min ，ZHAO Jian-bin ，GU Guang-dou ，CAI Hua-nan . Experimental study of engineering properties of geogrid-reinforced loess mixed with sand [J]. , 2013, 34(S2): 74-80.
[12] DONG Cheng ，LENG Wu-ming ，LI Zhi-yong ，CAO Xin-wen . Experimental study of dynamic resilient modulus of cement-improved high liquid limit clay [J]. , 2013, 34(1): 133-138.
[13] HU Meng-ling , YAO Hai-lin , LIU Jie , LU Zheng , YOU Hui-jie . Research on influence of dry density on subgrade performance [J]. , 2012, 33(S2): 91-097.
[14] LI De-ning , LOU Xiao-ming , YANG Min. Experimental researches on unloading resilient deformation properties during excavations in Shanghai area [J]. , 2011, 32(S2): 244-249.
[15] CHEN Kai-sheng，SHA Ai-min. Research on resilient modulus test of compacted loess [J]. , 2010, 31(3): 748-752.
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[3] YANG Ai-wu，YAN Shu-wang，DU Dong-ju，ZHAO Rui-bin，LIU Ju. Experimental study of alkaline environment effects on the strength of cement soil of Tianjin marine soft soil[J]. , 2010, 31(9): 2930 -2934 .
[4] ZHOU Hua，WANG Guo-jin1,，FU Shao-jun，ZOU Li-chun，CHEN Sheng-hong. Finite element analysis of foundation unloading and relaxation effects of Xiaowan Arch Dam[J]. , 2009, 30(4): 1175 -1180 .
[5] SONG Yi-min , JIANG Yao-dong , MA Shao-peng , YANG Xiao-bin , ZHAO Tong-bin . Evolution of deformation fields and energy in whole process of rock failure[J]. , 2012, 33(5): 1352 -1356 .
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