无限长土坡速度场或位移场函数分析研究

Functions of velocity or displacement along infinite slope soil profiles

利用速度场或位移场的近似函数解析土坡的渐进变形。首先提出了双折线和三折线的速度场函数,并与现场实测的速度场分布图做了比较,很好地拟合了剪切层和随动层的速度场分布,进一步地考虑到坡土并不是严格意义上的刚性体而是变形体,因此利用?z厚土层的牛顿运动方程,结合Bingham模型,直接求解出速度场的时空分布函数v(z,t),并与现场土坡的实测资料对比。最后,对上述两种分析方法进行了简单评述。

Functions of the velocity or displacement profiles of slope soil are suggested for describing the slow motiont of natural slopes. Dual or triple piecewise empirical functions are suggested and compared with the field measured results respectively from the shear zone to the rigid zone. Owing to that the slope soil does not rigorously obey the assumption of rigid body, continuous rather piecewise functions of velocity and displacement for the whole soil slope are directly solved from the Newton's equation of motion formulated by Bingham model and compared with the measured results. In conclusion, the two methods for description of slow motion of soil slopes are discussed.