【摘要】 都江堰是我国古代劳动人民创建的一项大型水利工程,沿用至今。为扩大灌溉及综合利用效益,需要改建都江堰工程。由于推移质泥沙的处理问题使都江堰工程改建几经周折。本文分析岷江及都江堰工程特点,分析讨论建闸及都江堰改建问题,及探讨卵石推移质输沙率的计算方法。更多还原

【Abstract】 Dujiangyan Irrigation Project was built on the main course of the Minjiang River at Guanxian County in the Sichuan Province 2200 years ago. This ancient project is still being in service at present. The total irrigated area has been increased from 130,000 hectares before liberation to more than 570,000 hectares nowadays. In order to meet the increasing demand of water development of the area, it is necessary to reconstruct the Dujiangyan headwork. The disposal of the pebble-gravel bed load is the key problem in the reconstruction of the project. The function of the Dujiangyan Diversion Works(without diversion dam) for preventing sand and gravel entering the intake has been analysed. Based on model study and analysis of operation experience of the headwork, some engineering measures have been recommanded as to build a diversion dam to deal with the disposal of gravel bed load. Experiences dealing with bed load problem of water conservancy and hydroelectric power projects in southwestern China have also been summarized. By considering merely a part of the gravels of the bed is movable, a modified formula of gravel bed load transport is presented.更多还原