Recently, Huai River Water Resources Commission Huai River Engineering Construction Administration, Jiangsu Provincial Engineering Investigation and Research Institute Co., Ltd., Jiangsu Hongji Water Source Technology Co., Ltd., South-to-North Water Transfer East Line Jiangsu Water Source Co., Ltd., Huai River Water Resources and Hydropower Development Co., Ltd. and other related units The book “The Practice of Rapid Consolidation and Mud Water Separation Technology in the Huai River Mainstream Dredging Project”, which was written by engineers and technicians in the past two years, was published by Hehai University Press. The book mainly introduces the characteristics of the Huai River mainstream dredging project and the practice of mud-water separation and rapid consolidation technology for silt disposal; the system summarizes the theory, design, construction, monitoring, effectiveness evaluation, etc. of mud-water separation and rapid consolidation technology. content. The publication of the book can provide reference and reference for similar projects.
The main stream dredging project of the Huai River is an important measure to solve the problem of poor circulation of the rivers in the middle and lower reaches of the Huai River, frequent flooding of flood storage areas, and overburdening of tributaries and drainages. It aims to expand the flow passage section of the main stream of the Huai River and increase the discharge of river channel tanks. Improve the river's own flood control capacity, so that many flood-stricken areas along the river line will be separated from the river flood control system, and the flood-protection areas will be allowed to develop normally, effectively alleviating the social contradictions of people's water disputes; and by expanding the Huai River's own flood channel to improve the Huai River The flood discharge capacity of the upper and middle reaches makes the flood discharge flow of the Huai River increase and the flood discharge speed accelerates, greatly reducing the duration of the “closed flooding” along the Huai River, and effectively improving the flooding effect of the Huai River; using the dredging machinery to carry out the river channel of the Huai River. Dredging, widening or deepening, while increasing the wet channel of the main stream of the Huai River and expanding the cross section of the river channel itself, it can also play a role in regulating the flow regime, improving navigation conditions, and improving the standards of drainage on both sides.
The main stream dredging project of the Huai River mainly uses a cutter suction dredger to excavate the dredging river channel, and fills the dredged silt into the mud disposal site on both sides of the river channel through the mud discharge pipe, and uses the water withdrawal system to keep the dredged silt soil in the mud discharge. In the field, the water body is discharged into the retreat and returned to the river. Affected by the dredging characteristics of the main stream of the Huai River, the dredging dredged into the dumping silt showed the characteristics of large water cut, long water withdrawal period, slow natural consolidation and low sediment strength. The mud field is in a swamp state for a long time, and it is difficult to form a stable structure and sufficient bearing capacity, which makes it difficult to timely re-cultivate the silt in the dumping site and it is difficult to deliver the people to the farm as scheduled; at the same time, even for most of the single silt field, The natural consolidation of silt meets the bearing capacity requirements. After the re-cultivation conditions, the consolidation of the fine particles in the area near the retreat gate in the dumping site is slow and the strength is low, so that the problem of partial failure to re-cultivate is extended to the whole. The dumping site cannot be handed over as a whole, which will inevitably lead to the extension of the temporary land occupation time of the mudslide project of the Huai River main stream dredging project, and then delay the construction period, resulting in the out-of-control compensation for the temporary land occupation of the mud dump.
The fundamental reason for the poor engineering characteristics of dredged silt is that its water content is high. Therefore, rapidly reducing the water content of dredged silt and reducing water treatment is a key issue in the treatment of dredged silt. With the continuous advancement of scientific and technological innovation, especially the emergence of two new technologies, new processes and new materials for dredging silt rapid consolidation and rapid mud-water separation, it provides us with a solution to the main difficulties of dredging works. The technical support and measures guarantee enriched the methods and means to solve the outstanding problems of the mud-discharging field, and played a positive role in promoting and comprehensively doing a good job in the construction and management of the main stream dredging project of the Huai River.
According to the basic principles and applicable conditions of rapid consolidation and mud-water separation technology, combined with the construction characteristics and actual working conditions of the Huai River mainstream dredging project, this book elaborates on the requirements of rapid consolidation and mud-water separation technology for the main stream dredging project of the Huai River. The system analysis of the necessity and feasibility of applying rapid consolidation and mud-water separation technology was carried out. The rapid consolidation engineering test was carried out on the Jingshan Lake levee retreat and reinforcement project and the Huai River main stream Fushan flood area Technical summary of two engineering examples of rapid mud-water separation technology for adjustment and construction projects, detailed introduction of technical requirements and work processes for project design, construction plan, implementation management, operation monitoring, etc. of rapid consolidation and mud-water separation technology, for popularization and rapid The theory, principle, process and method of consolidation and mud-water separation technology are a positive attempt, and we hope to get the reader's resonance, so that the rapid consolidation and mud-water separation technology can be widely promoted and applied in the field of dredged silt treatment. Give full play to its outstanding technical value and implementation efficiency.