分析了河道整治工程根石走失机理。根据混凝土四脚锥体重心低、稳定性强等特点 ,提出采用四脚锥体对根石进行加固 ,以防止根石走失。经过试验 ,加固坝段根石走失得到了有效控制 ,未再发生险情 ,根石断面基本稳定 ,坡度变陡。利用混凝土四脚锥体加固或补充根石 ,有较好的经济效益和社会效益 ,是防止根石走失的有效途径。 Analysis of the root canal loss mechanism of river regulation project. According to the low center of gravity of the concrete four-foot cone, the stability is strong and the like, a four-legged cone is proposed to reinforce the root stone to prevent the loss of the root stone. After the test, the reinforcement of the root of the dam has been effectively controlled, and no further danger has occurred. The section of the root stone is basically stable and the slope is steep. The use of concrete four-legged cone reinforcement or supplement the root stone, have better economic and social benefits, is an effective way to prevent the loss of root and stone.