Super-Deep Cut-Offs to Improve Inadequate Foundation and to Repair High Dams
Many damsites have not been harnessed because of unfavorable foundation conditions like deep alluvial deposits or pervious rocks or karst.Recently the technology of milled concrete cut-offs has made a major step forward pushing way back the limit of impracticable projects.The paper describes a new hydromill capable of cutting, using stabilizing fluids, panels to a depth of 250 m and the operations related to cutting and casting of a super-deep panel.The paper also describes super deep milled cut-offs obtained with the alternate technology of large diameter, secant piles to depths >250 m.The paper will describe preliminary and ancillary activities necessary to create such a cut-off.Finally the paper proposes examples of applications of the super-deep cut-offs to new dams and to repair existing dams (and their abutments) where emptying the reservoir is impracticable and the depth of repair must include a large part or the whole of the embankment.
P.Sembenelli S.Trevlsani D.Vanni
SC SEMBENELLI CONSULTING Srl, Via Santa Valeria, 3/5, 20123 ,Milan,Italy TREVI S.p.A., Via Dismano 5819, 47023 Cesena (FC) , Italy
国际会议
昆明
英文
791-801
2013-11-01（万方平台首次上网日期，不代表论文的发表时间）