【摘要】 通过对沿线8个钻孔资料的分析,采用土体动力参数分析方法,结合近些年地震破坏统计资料,对陕西省汉宁高速公路沿线进行地震小区划研究.研究表明:全线软弱土层较多,标准贯入值低;顶层软土、中间层位的细、粉砂和底部黏土及粉土层的剪切波速分别在100 m/s,300~400 m/s和500 m/s之间;根据地面最大加速度和最大速度,可将全线分为两个分区,具有明显不同的土体动参数特征;在该地区进行结构物抗震设计时,应按照中等液化进行考虑.更多还原

【Abstract】 According to the analysis of 8 drills data,this paper conducts a research on the seismic microzonation of Hanning expressway subgrade in Shaanxi Province by using soil dynamic parameters analysis combined with statistical information of the earthquake disasters in recent years.The research shows that the soft soil is widely distributed along the whole expressway,the standard penetration test value is low,and the shear wave velocity of soft soil in the top layer,the fine silt in the middle layer,the clay and silt in the bottom layer are 100 m/s,300 ~400 m/s and 500 m/s respectively.Based on the maximum acceleration and the maximum speed of the ground,the whole line could be divided into two parts with different dynamic characteristics of soil parameters.When designing the earthquake-resistant structure in the zone,the soil should be regarded as the medium liquefied zone.更多还原