湖南省韶山灌区主要工程于一九六六年建成通水,一九六七年开始大面积采用三合土护渠。几年来,总干渠和干渠约一百二十公里的填方部分,已有百分之八十以上打了三合土。实践证明,三合土衬砌能减小糙率,防止渗漏,提高水的利用率,具有显著的效果。其主要 The main project of Shaoshan irrigation area in Hunan Province was completed in 1966 with water intaking. In 1967, a large area of ​​Sanhe soil retaining canal was started. Over the past few years, more than 80% of the filling sections of about 120 kilometers in the main and main canals have hit Sanduo. Practice has proved that triaxial soil lining can reduce the roughness, prevent leakage, improve water utilization, with significant results. Its main