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Many children Ⅳ Hydropower Project and other small scale projects ( 1 ) type projects, the main building level 4 . In this paper, the main station building more children : spillway , concrete face rockfill dam design and construction techniques were analyzed to study . Due to the topography, geology conditions, many children hydropower chute spillway chute had arranged to bend . When the water flow through the corners of the tank wall by centrifugal force and interference , was forced to change the flow , resulting in a corner of the inner and outer wall surface elevation larger ( often flood the maximum height of 5.04m, check the maximum high water level deviation of 5.42m.), while rapids in the corners will produce a shock wave . This issue through the whole 1:40 hydraulic model of the multi- child Spillway flow characteristics curve rapids experimental research and theoretical analysis, shape optimization through a variety of programs , the use of compound curves cross- sector solutions to better bottom slope solve the multi- child spillway rapids bend flow problems . Test measured frequently encountered when flood waters around sidewall maximum deviation of 0.25m; check flood maximum surface deviation of 0.34m, and the flow pattern within the curve than the original program has greatly improved . CFRD has a cross-section of small , good security , easy construction and low cost , the growing emphasis by the engineering sector , has become the domestic and foreign many engineering preferred dam . However, this new type of dam design and construction is mainly built on the basis of experience , how to calculate the face rockfill dam stress, strain, is of great concern to the engineering sector .
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