摘要
糯扎渡水电站心墙堆石坝最大坝高261．5m，在同类坝型中居国内之首、世界第四，与国内目前已建最高的154m的小浪底大坝相比，糯扎渡跨了约11Om的台阶，因此对糯扎渡高心墙坝防渗土料特性进行了系统研究，以解决超高心墙堆石坝防渗土料的技术难题。本文针对糯扎渡防渗土料的实验研究，详细介绍了不同掺砾量土料特性比较、流变变形特性、土料与反滤料接触界面、水力劈裂、现场碾压试验成果。最后，根据试验研究成果，确定了防渗土料的填筑控制标准，并已用于现场施工中。
The core wall rockfill dam of Nuozhadu Hydropower Station with maximum height of 261.5m is ranked the first place in China and the fourth place in the world among the same type of dams. Compared with the built Xiaolangdi Dam of 154m which is the highest in China currently, Nuozhadu Hydropower Station steps across about 110m＇s terrace, so systematic study is made for the characteristics of anti-seepage soil material of high core wall dam at Nuozhadu Hydropower Station, so as to solve the technical problems existing in anti-seepage soil of ultrahigh core wall dam. Through experimental study on the anti-seepage soil of Nuozhadu Hydropower Station. The characteristic comparison of soil mixed with different gravel content, creep deformation characteristic, contact interface between soil material and filter material, hydraulic fracture and results of field compaction test were introduced. Finally, according to the experimental study results, the filling control standard of anti-seepage soil material was confirmed and has been applied into the on-site construction.
关键词
砾质土人工掺砾流变接触面水力劈裂碾压试验
gravelly soil, manual gravel mixing, creep, contact interface, hydraulic fracture and compaction test
