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Heavy metal-polluted ephemeral stream sediment dredging method

A technology that pollutes sediment and heavy metals, applied in river regulation, water conservancy projects, sea area projects, etc., can solve problems such as lack of systems, achieve strong pertinence, solve pertinence and lack of flexibility

Active Publication Date: 2015-07-29
山东省环科院环境工程有限公司
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0013] The present invention aims at the problem that current seasonal rivers lack systematic and targeted dredging technology for heavy metal-polluted sediments, and combines typical hydrological characteristics of seasonal rivers to provide a method that can fully realize the combination of site and governance process, adapt measures to local conditions, and be easy to implement Dredging method of heavy metal polluted sediment in seasonal rivers

Method used

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  • Heavy metal-polluted ephemeral stream sediment dredging method

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Embodiment Construction

[0035] The specific implementation process of the dredging method for heavy metal polluted bottom mud of seasonal rivers of the present invention is as follows.

[0036] (1) First, carry out topographic surveying and mapping of the channel of the target river section for dredging and investigate the status quo of heavy metal pollution in the sediment, and at the same time conduct a detailed river hydrological investigation on the target river section, and then divide the entire target river section into several unit projects according to the project implementation conditions 3. The project implementation conditions include river topography, hydrological conditions and temporary treatment site conditions;

[0037] (2) Enclose the entire dredging target river section with front and rear section cofferdams 1, and divide each unit project 3 with longitudinal or horizontal unit cofferdams 5 for intervals. The cross-section cofferdam 1 and the unit cofferdam 5 are made of materials s...

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Abstract

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.

Description

technical field [0001] The invention relates to a dredging method for polluted bottom mud of water bodies such as seasonal rivers (including rivers, rivers, rivers, and river courses), and belongs to the technical field of treatment and restoration of polluted bottom mud. Background technique [0002] Sediment usually refers to the mixture of clay, silt, organic matter and various minerals, which is formed by depositing at the bottom of the water body after long-term physical, chemical and biological actions and water body transportation. Sediment can reflect the historical process of water body evolution, and is an important part of natural water ecosystems such as rivers, lakes, and tidal flats at river estuaries. [0003] Sediment pollution can be divided into organic pollution and inorganic pollution, inorganic pollution can be divided into nitrogen, phosphorus and other eutrophic substances pollution and heavy metal pollution. Organic matter, nitrogen, phosphorus and o...

Claims

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Application Information

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IPC IPC(8): E02B3/02
CPCE02B3/023
Inventor 马涛刘强靖玉明刘道行顾俊杰
Owner 山东省环科院环境工程有限公司
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