摘要
本文探讨荆江大堤堤基管涌和管涌破坏的机理。文中阐述了荆江大堤渗流稳定问题的主要特点:(1)管涌发生并不一定管涌破坏;(2)管涌发生的地点有近有远;(3)堤基渗流破坏的最终形式是流土;(4)管涌的扩展是一随机过程。在理论分析和模型试验的基础上,给出核算堤基渗流稳定的方法和公式。据此,用可靠性分析方法确定荆江大堤保护范围。实例证明本文的方法和公式是正确的。用本文的方法可以大大节约整险加固工程投资。
The mechanism of piping and piping failure in Jingjiang Dike foundation is studied. The seepage stability of Jingjiang Dike foundation is characterized by that; (i)the occurence of piping does not mean piping failure; (ii)the spots of piping may be far from or near to dike-toe; (iii)the final form of seepage failure is mass-flow; (iv)the development of piping is a stochastical process. On the basis of theoretical analysis and model test, the method and formula for estimating the seepage stability of dike foundation are provided. Accordingly, through reliability analysis protective scope of Jingjiang Dike is determined.
出处
《长江科学院院报》
CSCD
北大核心
1991年第2期44-51,共8页
Journal of Changjiang River Scientific Research Institute
关键词
堤坝
基础
管涌
渗透
稳定性
piping
piping failure
reliability
seepage stability
