River channel dredging method
The invention relates to the technical field of river channel dredging, in particular to a river channel dredging method which comprises the following steps: dividing a riverway to be cleaned into cofferdams, and dredging the riverway in a segmented manner by adopting a cutter suction pumping mode a...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention relates to the technical field of river channel dredging, in particular to a river channel dredging method which comprises the following steps: dividing a riverway to be cleaned into cofferdams, and dredging the riverway in a segmented manner by adopting a cutter suction pumping mode and a hydraulic flushing and digging mode; then subjecting the cleaned muddy water sequentially to preliminary precipitation, sorting and flocculent precipitation to obtain purified sludge; finally, dehydrating and sun-drying the purified sludge in sequence, and backfilling a mud cake after sun-drying. According to the river channel dredging method, the physical and chemical combined treatment process is adopted and are ingeniously combined, so that the arsenic, copper, chromium and other heavy metal ions in the bottom mud can be effectively treated, harmless and resourceful treatment of the bottom mud is achieved, secondary pollution caused by discarding of the bottom mud without treatment can be prevented and the |
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