一种探测砂土中软黏土包的瑞雷波方法

Method of detecting soft clay mass in sandy soil based on Rayleigh wave

填海造陆地基固结过程中容易形成软黏土包,给现场监测数据的分析和解释造成困难,因此有必要对砂土中的软黏土包进行定位。提出探测填海造陆地基砂土中软黏土包的瑞雷波方法。采用两道瑞雷波法提高瑞雷波检测的横向分辨率,同时在测试场地进行静力触探法检测,通过对比验证了瑞雷波法在软黏土包定位中的有效性。通过连续数次进行多道信号提取,绘制了较大范围内软基土体的两道瑞雷波相速度剖面热图,由热图可以直观地发现软黏土包及其基本性质。

In the process of land reclamation consolidation,it is easy to form soft clay packages,which bring difficulties to the analysis and explanation of the field test data.So it is important to locate soft clay packages.This paper proposes a method of detecting the soft clay packages formed in land reclamation consolidation process with Rayleigh wave.The lateral resolution is improved with two-channal Rayleigh wave method,and cone penetration test is conducted simultaneously.The comparison of the two methods shows the validation of Rayleigh wave method in detection of the soft clay package.Two-channal Rayleigh wave velocity hot map for a larger range can be drawn by test several times continuously in a line,from which soft clay packages and their basic properties can be seen directly