摘要
对以往曾经发生显著液化的唐山地区和巴楚地区的土动力学性能进行对比研究,包括两个地区砂土相对密度与剪切波速关系、剪切波速与标准贯入击数关系等,以此深入了解两个重要地区土层的动力性能,为研究区域化液化判别方法提供基础。结果表明:现行抗震规范液化判别方法数据来源主要为唐山地区,明显不适用于新疆巴楚地区的液化判别;唐山地区与巴楚地区液化场地砂土取相同相对密度时,两个地区液化场地砂土剪切波速差别很小;但唐山地区与巴楚地区液化层砂土平均标准贯入击数和V_s^N_(63.5)关系曲线差异显著,表明以V_s^N_(63.5)关系区分不同地区砂土抗液化能力是可能的。
The paper compares the dynamic properties of sandy soils in order to develop regional liquefaction pre-diction methods, which includes relationships between relative density and shear wave velocity of liquefied sand,N- Vs curves in the areas of Tangshan and Bachu. The results show that the data source of the seismic code ismainly from Tangshan area, which cannot be applied to Bachu area, Xinjiang Province; the shear wave velocitiesare very close as the two areas have the same relative density of liquefaction soil; there is obvious contrast in aver-age blows of SPT and the correlation of Vs - N63. 5 curves in the two areas. It is indicated that Vs-V63.5 curves areavailable to distinguish the liquefaction resistance of sand in different regions.
出处
《地震工程与工程振动》
CSCD
北大核心
2016年第5期162-167,共6页
Earthquake Engineering and Engineering Dynamics
基金
中国地震局工程力学研究所基本科研业务费专项(2016A02)
国家自然科学基金项目(51508532)
国家科技支撑项目(2015BAK17B01)~~
