软土边壁(坡)流鼓破坏模式研究

依据相似模型原理及所建立的相似法则，对软土边壁（坡）破坏模式进行了实验研究。试验研究证实，刚体转动假设不适用于软土边壁（坡）稳定性分析；软土地壁（坡）不取圆弧破坏模式，而是取流鼓破坏模式。模型实验结果与现场试验及理论分析计算结果规律基本和，数据较为吻合。

STUDY ON THE FLOW-CONVEX FAILURE PATTERN OF SOFT CLAY SIDE WALLS AND SLOPES

The experimental study results of the failure pattern of soft clay side walls and slopes are reported based on the similar model principle and the established similarity law. The study results prove that the wellknown rigid body rotation hypothesis is not suitable for the stability analysis of soft clay side walls and slopes. A soft clay side wall or slope, when it fails, follows neither the Arc Failure Pattern(AFP), nor the Plane Failure Pattern(PFP), nor other popular failure patterns. Rather, it follows the Flow-convex Failure Pattern (FFP). Five major characteristics of the FFP could be described in sectional function. The above experimental study results are well in agreement with those of site tests and of finite-element calculations,and are successfully applied in practical projects of soft clay.