湖北省荆江大堤沿堤地基土的分类特征

利用脉动测振方法对荆江大堤堤面沿线土层进行了实测研究,并对实测记录进行了傅氏谱分析。结果表明,沿堤土层绝大部分属于二类土地基,但有若干堤段土层属于由松散的粉、细砂所构成的三类土地基,且饱和程度非常高,有产生管涌和地震动液化的可能,应予特别注意。

CLASSIFYING OF THE BASE SOIL ALONG JINGJIANG EMBANKMENT IN HUBEI PROVINCE

For ensuring the safety and stability of Jingjiang embankment, 186. 5 km of length, in Hubei province and satisfing the needs of engineering aseismic design, the dynamic characteristics of soil layers of the embankment are observed by using the method of pulsative oscillation,and the data are analyzed by means of Fourier spectrum method. The results show that although most soil layers of the embankment belong to the second kind of soil base, a few sections belong to the third kind of soil base which consist of loose silt or fine sand. Because water level in the sand is very high, the piping effect or liquefaction of seismic motion is probablly caused. These phenomena should be specially paid more attentions.