深厚覆盖层上土石坝防渗技术研究进展

从垂直防渗、水平防渗和联合防渗的角度,总结了深厚覆盖层上土石坝防渗的关键技术。阐述了混凝土防渗墙、灌浆帷幕、墙幕结合、水平铺盖等防渗措施在深厚覆盖层地基渗流控制上的创新和突破,并介绍了有限单元法、边界元法等数值模拟技术在土石坝渗流控制领域中的应用。结合3个代表性工程实例分析了深厚覆盖层上土石坝合理的防渗措施的选择及其优化方法,给出了深厚覆盖层上土石坝防渗的建议,并指出尚待深入研究的几个问题。

Review of seepage control of earth-rockfill dams on thick overburden layer

Seepage control techniques for earth-rockfill dams built on a thick overburden layer are reviewed from the perspectives of the vertical cutoff technique, horizontal anti-seepage technique, and joint seepage control. Innovations and breakthroughs in the seepage control of earth-rockfill dams on a deep alluvion foundation using the concrete anti-seepage wall, the grout curtain, a wall and curtain combination, and horizontal coverage techniques are described. And the applications of the FEM and BEM methods in numerical simulation of seepage control for earth dams are introduced. As applied to three typical engineering projects, reasonable seepage control measures and their optimization for earth-rockfill dams on a thick overburden layer were studied. Some suggestions and key issues for seepage control of earth-rockfill dams on a thick overburden layer are described.