透水地基上填土成层土坝的渗流特性及加固措施的研究

Study on Seepage Flow Character and Reinforced Measures for Layered-built Embankment Dam in Permeable Foundation

本文以黄泥埠土坝断面为研究代表,对填土成层土坝进行了无防渗设施、垂直防渗、水平防渗、坝下游挖排水沟及防排结合的十多组方案的渗流电拟试验,并且分析了不同防渗措施的渗流状态,基本摸清了透水地基上填土成层土坝的渗流特性,提出了这类土坝分别采用以防为主、挖排水沟及防排结合加固方案,其适用条件及采用相应的渗流控制措施时应注意的问题,为治理这种特殊类型土坝的险情提供了科学的依据。

This paper is based on the study of the embankment dam in Huang Nipu, according to more than ten groups of electrical analogy model test, such as on preventive infiltrated measures, vertical and horizonal seepage control, bigging drainage bitch in the downstream of the dam and the combination of preventive infiltration and drainage water. This paper also analyses the different seepage flow conditions resulted from the different measures of seepage control and gets to know basically the seepage flow properties of the layered-built embankment dam on the permeable foundation. Based on the knowledge from the study, we suggest the applicable conditions for making use of prevention seepage as the main measure, digging drainage ditch, and combining prevention with drainage in the similar earth dam, and also present the problems worthy of note for the corresponding measures of seepage control. In addition, the paper provides a scientific basis for the dams of this special type under the dangerous condition.