Drainage pipeline sediment on-well sampling method

Abstract

The invention provides a drainage pipeline sediment on-well sampling method. The method comprises the following steps: taking a connecting rope to connect a floating plate at a tail end, and then feeding the floating plate into a first inspection well by handholding the connecting rope, enabling the floating plate to enter a drainage pipeline communicating with the first inspection well by utilizing the underground waterflow; when the floating plate enters a second inspection well located at a downstream of the drainage pipeline through the water flow in the drainage pipeline, hooking up the floating plate by using a hook, and connecting a sampler at the tail end of a traction rope; arranging a lifting device at a well opening of the first inspection well; pulling the traction rope, and enabling the traction rope to slide along a fixed pulley, thereby enabling a sampler to perform retrograde motion along the drainage pipeline water flow, and enabling the deposit to enter a sampler; andpulling out the sampler, and finishing the sampling. The sampling personnel is unnecessary to go down, the connection of the sampler and the lifting device can be realized on the ground, and the sampling is accomplished.

Description

technical field [0001] The invention relates to the technical field of water supply and drainage engineering, in particular to an uphole sampling method for sediments in drainage pipes. Background technique [0002] Urban drainage pipes are an important part of the urban drainage system and have important functions of collecting and transporting domestic sewage, industrial wastewater and rainwater. After long-term operation, urban drainage pipes basically have different degrees of pollutant deposition. Sediment will not only cause pipeline corrosion and reduce the delivery capacity of the pipeline system, but also under the scouring action of rainwater runoff, the pollutants in the sediment will be re-released into the runoff and enter the water body, posing a threat to the water environment of the receiving water body. Research on sewer sediments needs to be strengthened. [0003] However, at present, the commonly used sampling method for urban sewage pipeline sediments i...

AI Technical Summary

Problems solved by technology

Sediment will not only cause pipeline corrosion and reduce the delivery capacity of the pipeline system, but also under the scouring action of rainwater runoff, the pollutants in the sediment will be re-released into the runoff and enter the water body, posing a threat to the water environment of the receiving water body. More research on sewer sediments needed

[0003] However, at present, the commonly used method of sampling the sediments of urban sewage pipes in China is manual downhole sampling, and the fermentation of sulfur-containing organic matter in the sediments produces hydrogen sulfide, which affects the safety of the sampling personnel in downhole operations

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