Method for determining waterway dredging mud dumping time period on basis of sediment loss rate minimum criterion

Abstract

The invention discloses a method for determining a waterway dredging mud dumping time period on the basis of a sediment loss rate minimum criterion, and relates to a general operation method of an excavator or a dredger, in particular to a method for controlling the mud dumping operation time of a waterway dredging ship by selecting the mud dumping time period according to hydrodynamic data of dredged soil and sediment. The method comprises the following steps that 1, water-sediment movement observation is conducted on the periphery of a mud dumping pit, and on-site test data and tidal data are acquired; 2, the critical starting shear stress and the critical starting flow velocity of the dredged soil and sediment are determined; 3, the hydrodynamic force at the position of the mud dumping pit is calculated, and a flow velocity hydrograph is drawn; 4, the mud dumping time period of the corresponding mud dumping pit is determined on the basis of the sediment loss rate minimum criterion. According to the method, the mud dumping operation time of the waterway dredging ship is controlled by selecting the mud dumping time period in a targeted mode, therefore, the sediment loss rate in the mud dumping process can be decreased by about 30%, the utilization rate of the dredged soil can be increased, and great economic benefits are brought.

Description

technical field [0001] The invention relates to a general operation method of an excavator or a dredging machine, in particular to a method for selecting a mud throwing time period by using hydrodynamic data of dredged soil and sand, and realizing time control of a channel dredging ship mud throwing operation. Background technique [0002] In river estuaries, deep water channels often require dredging ships to carry out regular channel maintenance and dredging to maintain the water depth of the channel; professional dredging ships are mainly used to suck the sediment in the channel that needs to be dredged into the cabin, and transport it to the designated place for mud throwing operations , empty the cabin, and reciprocate to finally complete the dredging and maintenance of the channel. The sediment in the mud throwing pit is usually blown to the area that needs to be filled through the mud blowing pipeline to reuse the dredged soil. [0003] During the dredging ship’s mud...

AI Technical Summary

Problems solved by technology

The determination of the mud throwing time period of dredged soil under the action of existing tides is often based on experience alone, or there is no limit to the mud throwing time period

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