The Design And Study Of Xuanmiaoguan Roller ComPacted Concrete (RCC) Vaulted Dam

After nearly 20 years' development, the building technique of our country's rollercompacted concrete dam has step to the level of the world. Existed and underconstruction's roller compacted concrete dams, not only in dam type, dam height butalso in speed of construction have set world record. To the detailing of the dam, such asnearby the template, around the water stop, gallery perimeter and bank slope position,etc., Our country's technical staff originally create add grout vibrating concreteconstruction method, that is, add some net grout of cement in already spreading out theconcrete material completed, increase its slump, then vibrate it with the vibrator, Thiskind of construction technology succeeded using in a lot of projects and accumulatedabundant experience. But there are many questions exist yet in it, mainlygrouting-in-place. The amount and consistency of plasm are not easy to control, andresult in some influence on the whole quality of the roller compacted concrete.This text combines the design and construction of xuanmiaoguan double-curvedarch dam in Yichang of Hubei provience, experimental study and applying toengineering practice to the slump concrete has been gone on a bit, so-called zero slumpconcrete, that is slump is zero basically but Vc value is 1-3s's concrete, Manyperformance of this concrete lying between the normality concrete and rolling concrete,it can vibrate as well as roll. This kind of concrete is mixing successful once inbatching plant, needn't grouting-in-place, it quality symmetrical, easy to construct, itfetches up the shortage of quality not even of the add grout vibrating concrete. On thefoundation of studying project like panjiakou shimantan, this project apply zero slumpconcrete to the roller compacted concrete double-curved arch dam for the first time, theresult is good;make a certain of technological economic benefits.At present, xuanmiaoguan roller compacted concrete double-curved arch dam hasbeen built up basically already, from appearance examination and fetch core measureachievement, various kinds of performance of zero slump concrete meet the designingrequirement completely.This text tells about the design of xuanmiaoguan roller compacted concretedouble-curved arch dam, the experimental study and application of zero slumpconcrete in the project.