HOU Hao,ZHU Wei,CHEN Yi-ren,et al.Box Culvert Dredging and Mud Treatment and Utilization：A Case Study[J].China Water & Wastewater,2022,38(2022 1 1):108-113.
Box Culvert Dredging and Mud Treatment and Utilization：A Case Study
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
2022 1 1
Page:
108-113
Column:
Date of publication:
2022-01-01
- Keywords:
- box culvert; dredging; mud treatment; mud utilization; plate pressure filtration
- Abstract:
- As the trunk main of urban drainage network, stormwater box culvert has been seriously silted and blocked during long-term operation. How to dredge the box culvert, treat and use the mud after dredging is a difficult problem that many cities are currently facing. Variations in physical and chemical properties of mud during treatment in a typical reconstruction project in Wuhan Optical Valley, Hubei Province were investigated, and the mechanical properties of mud cake were also analyzed. Based on the analysis of mud properties, the key problems existing in the dredging and mud treatment and utilization of this typical project were summarized as follows: artificial dredging was dangerous and inefficient; the process was suitable for large earthwork and rapid construction conditions, but there were some problems such as low efficiency of mud treatment process, poor concentration performance of sedimentation tank, and failure of plate and frame machine to give full play to its effectiveness; the tail water of construction was not treated, Zn content of the mud cake exceeded the standard, and outsourcing treatment of this contaminated soil might cause secondary pollution. These are also common problems in Chinese urban network dredging project, and guidance and reference for box culvert dredging project are provided through summarizing the problems.
Last Update:
2022-01-01