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根据资料分析和现场调查,对平原区公路路基常见震害进行分类。结合库仑强度理论和有效应力原理分析平原区公路路基震害机理。研究表明:地震作用引起土体中超静孔隙水压力上升、有效应力降低,从而弱化了土体的强度;水平地震力是诱发路堤、边坡破坏的因素;同水平地震力相似,竖向地震力同样会造成土体强度的削弱。最后,针对平原区公路路基震害的特点和机理,在平原区道路的选线、施工、质量控制等方面给出防治措施。
According to the data analysis and site survey, the common damage of highway subgrade in plain area is classified. Combining Coulomb’s strength theory and effective stress principle to analyze the damage mechanism of highway subgrade in plain area. The results show that the seismic effect causes the excess pore water pressure in the soil to rise and the effective stress to decrease, thus weakening the strength of the soil. The horizontal seismic force is the factor inducing the embankment and slope failure. The same level seismic force and the vertical seismic force The same will result in weakened soil strength. Finally, according to the characteristics and mechanism of roadbed damage in the plain area, some preventive and control measures are given in the route selection, construction and quality control of the plain area.