水利工程施工截流技术进展

概述了截流技术进展，指出截流技术的发展趋势：立堵（或立堵为主）逐渐代替平堵；立堵截流中用平抛垫底防止堤头坍塌，降低截流难度；趋向较高水头截流，可减少导流隧洞或导流明渠工程量；现代运输和吊装机械的发展，使采用更大块重、更高抛投强度实现高水头截流成为可能；为实现高落差截流，可采用双戗或多戗截流方式；加大抛投强度，由于施工机械快速发展，能较快速截流，加快围堰施工进度。

The progress of river closure technology of hydroprojects

This paper summarizes the technical progrress in river closure and points out the development trend of river closure technologies: vertical closure(or taking vertical closure as dominant means) gradually takes the place of horizontal closure;Bedding material is horizontally dumped in advance on a river bed for vertical closure to prevent closure dyke heads from collapsing and reduce the difficulties in river closure;There is a trend of river closure with a higher water head in order to decrease the work amount of diversion tunnels or diversion channels;with the development of modern transportation and hoisting machinery,river closure with a higher water head could be realized by using large-sized rock blocks and higher dumpimg intensity;Dual or multiple closure dykes could be used for carrying out river closure under high-drop condition;With rapid development of construction machinery,quick river closure could be completed by increasing the dumping intensity to speed up the construction progress of a cofferdam.