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- Title
柔性基层预制块铺面力学行为及参数研究.
- Authors
王火明; 王秀; 周刚; 凌天清; 徐周聪
- Abstract
By using a large full-scale indoor ring road test on precast block pavement with graded gravel flexible base, the bearing capacity characteristics and mechanical parameters of precast block pavement were studied. The influences of joint width, sand cushion thickness, precast block geometrical dimensions on the bearing capacity of precast block pavement were investigated. The prediction model for permanent deformation(εp) of precast block pavement under different numbers(N) of load was established based on full-scale ring road test results. The results show that, as the load increases, the deflection of precast block pavement increases nonlinearly. The critical deflection of precast block pavement is about 1.95 mm when the joint width is 5 mm, sand cushion thickness is 2 cm and precast block thickness is 16 cm. When the aspect ratio of precast block is from 1. 19 to 1.81, the thickness of precast block is from 8 cm to 29 cm, the load diffusion coefficient of precast block pavement ranges from 1.16 to 1.42. When the joint width is about 5 mm, sand cushion thickness is from 3 cm to 5 cm, the permanent deformation coefficient of precast block pavement is taken as 0.85. The prediction model for permanent deformation of precast block pavement is εp=1.62821n(N/5000+1)+0.4821.
- Publication
Jianzhu Cailiao Xuebao: Journal of Building Materials, 2015, Vol 18, Issue 3, p464
- ISSN
1007-9629
- Publication type
Article
- DOI
10.3969/j.issn.1007-9629.2015.03.018