关键词: 长江上游, 卵石疏浚, 施工与通航矛盾, 疏浚方法, 自行走疏浚装置, 作业方案

Abstract: The upstream waterway of the Yangtze River is curved, narrow, shallow and urgent, which demands annual dredging and maintenance to ensure the normal passage of ships. However, the current dredging and maintenance method is dominated by the hard-boom multi-purpose grab dredger, equipped with auxiliary ships for operation. This operation mode needs to anchor the dredger on the shore, and thus the wire rope will cross the waterway, hindering the normal passage of other ships during the dredging operation. The upstream operating environmental conditions and the current waterway dredging methods are compared and analyzed to design a self-propelled dredging device suitable for the operation under the environmental condition of the upstream waterway of the Yangtze River. A set of dredging operation schemes is also proposed for the upstream waterway of the Yangtze River in view of the designed device. Through the evaluation of the proposed schemes, it is concluded that the self-propelled dredging device and these schemes can solve the passage problems of other ships during the dredging operation, and effectively improve the efficiency of the dredging operation, which can be used as a new method to solve the construction problems of the upstream waterway of the Yangtze River, providing references for the dredging operation of the upstream waterway of the Yangtze River.

Key words: upstream of the Yangtze River, pebble dredging, contradiction between dredging and navigation, dredging method, self-propelled dredging device, operation scheme