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Heavy metal-polluted ephemeral stream sediment dredging method
The invention relates to a heavy metal-polluted ephemeral stream sediment dredging method, which includes the following steps: (1) unit constructions are divided on a whole target reach; (2) the whole dredged target reach is enclosed by sectional cofferdams, the divided unit constructions are isolated from one another by unit cofferdams, and diversion canals are arranged at both sides of the central line of a riverway or a diversion canal is arranged at one side of the central line of the riverway; (3) a riverway sediment storage pond and an accidental sediment storage pond are built in each unit construction, sludge lift pumps are installed in the riverway sediment storage ponds, and accidental sludge lift pumps are installed in the accidental sediment storage ponds; (4) unit construction dredging is started, high-pressure flushing water pumps or earthwork machines are adopted to carry out the construction dredging on sediment according to dredging range and dredging depth requirements or the earthwork machines are utilized to carry out excavation, and the flushed or dug polluted sediment is conveyed to a specified position on a bank. The method is sufficiently combined with the hydrological conditions of the ephemeral stream, construction conditions and the control requirements of heavy metal-polluted sediment dredging, and is highly purposeful.
Heavy metal-polluted ephemeral stream sediment dredging method
The invention relates to a heavy metal-polluted ephemeral stream sediment dredging method, which includes the following steps: (1) unit constructions are divided on a whole target reach; (2) the whole dredged target reach is enclosed by sectional cofferdams, the divided unit constructions are isolated from one another by unit cofferdams, and diversion canals are arranged at both sides of the central line of a riverway or a diversion canal is arranged at one side of the central line of the riverway; (3) a riverway sediment storage pond and an accidental sediment storage pond are built in each unit construction, sludge lift pumps are installed in the riverway sediment storage ponds, and accidental sludge lift pumps are installed in the accidental sediment storage ponds; (4) unit construction dredging is started, high-pressure flushing water pumps or earthwork machines are adopted to carry out the construction dredging on sediment according to dredging range and dredging depth requirements or the earthwork machines are utilized to carry out excavation, and the flushed or dug polluted sediment is conveyed to a specified position on a bank. The method is sufficiently combined with the hydrological conditions of the ephemeral stream, construction conditions and the control requirements of heavy metal-polluted sediment dredging, and is highly purposeful.
Heavy metal-polluted ephemeral stream sediment dredging method
MA TAO (author) / LIU QIANG (author) / JING YUMING (author) / LIU DAOXING (author) / GU JUNJIE (author)
2015-07-29
Patent
Electronic Resource
English
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
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