Emergence and application of micro-processor and technique of hydraulic drive and the increasing deepening of knowledge on fluvial characteristics and behaviour of currents and sediment transportation since 1950s have seen the rapid development of dredging equipment and dredging technology.
By tracing the development history of dredging equipment, the paper analyzed the hard endeavoring history of China's dredging industry from 1949 to 1989, the 10 year rapid development period starting from early 1990s, factors restricting this development and its future prospects.
The development of underwater pump davit for deepwater dredging workboat has made a great contribution to the local production of dredging equipment for China's first large deepwater dredging workboat. This paper summaries the structure principle and design points of underwater pump davit.
The article highlightes the development and achievements in ship type and dredging equipment of large size SHDs abroad in the recent 10 years. The author put forward some proposals according to the market demand and existing problems at home today.
Based on the integrated analyses of the rate of back silting given in Tianjin Port,maintenance dredging intervals and available dredging equipment suitable for the dredging in the channels and basins,it is proposed,in the light of the engineering practice of maintenance dredging in Tianjin Port,that the depth for siltation in the navigation channels being under construction for vessels from 150 000 dwt to 200 000 dwt in Tianjin Port should be 1.0 m and 1.4 m for the basins and berth boxes.
This contribution reviews dredging equipment currently in use by marine geological institutions and refers to pinger attachments that allow precise information on the behaviour of the dredge to be telemetered back to the ship.
In the 1920s, dredging for gold in the rivers again became profitable using large-scale dredging equipment.
It is of concern that there are a number of broad recommendations such as using 'low cost dredging equipment' or 'suitable dredging practices'.
Following the hot spot dredging, a pre-design field test using mechanical dredging equipment was performed in August 2000.