Device and method for rapid drainage and consolidation of dredged sediment in rivers and lakes with high clay content

Abstract

The invention relates to a fast drainage consolidation device and method for river and lake dredging bottom mud, in particular to a fast drainage consolidation device and method for river and lake dredging bottom mud with the high clay content, and belongs to the technical field of water conservancy projects and navigation projects. The device comprises a mud-filled tube bag which is provided with a mud filling opening in the surface and of a double-layer structure, at least two drain plates connected in parallel are arranged in the mud-filled tube bag, connectors are arranged at the two ends of each drain plate respectively, the connectors at each end are connected in parallel through a pipeline, one ends of the pipelines are closed, and the other ends of the pipelines stretch out of the mud-filled bag and are connected with a vacuum device. A traditional mud-filled tube bag technology and a vacuum consolidation technology are innovatively optimized and fused, the limitation of the single technology is broken through, the problem that drainage consolidation of the river and lake dredging bottom mud with the high clay content is slow is solved, the construction period is shortened, the construction efficiency is improved, the drainage consolidation effect is enhanced, the emission level of tail water is promoted, economic environment benefits are remarkable, and the market application prospects are broad.

Description

technical field [0001] The invention relates to a rapid drainage and consolidation device and method for dredging sediment of rivers and lakes, in particular to a rapid drainage and consolidation device and method for dredging sediments of rivers and lakes with high clay content, belonging to the technical field of water conservancy and waterway engineering. Background technique [0002] The water pollution of rivers and lakes in our country is serious, and large-scale river and lake sediment dredging is required every year, which inevitably produces a large amount of dredged river and lake sediment that needs to be treated. According to the "Overall Plan for Comprehensive Treatment of Water Environment in Taihu Lake Basin" (2008), only the comprehensive improvement project of East Taihu Lake needs to dredge up to 18 million m3 of sediment. In addition, there are as many as 1,000 rivers and 3,574 kilometers of dredged rivers in the Taihu Lake area of ​​Jiangsu Province. The ...

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Problems solved by technology

In essence, this method is based on the self-weight load of the tube bag, and the vacuum load is added in the same load direction, and the rapid drainage is realized by greatly increasing the superposition of the load. Poor dredging mud, excessive load often leads to silting problems (Zhou Yuan et al. Indoor model test research on air-permeable vacuum rapid mud-water separation technology [J], Journal of Vacuum Science and Technology, 2010, 30(2): 215 -220; Deng Dongsheng et al. Model test research on air-permeable vacuum mud-water separation of low-concentration dredged silt [J]. Acta Geotechnical Engineering, 2009, 31(2): 250-253;), therefore, this method will be limited in practical application Certain limitations, when encountering dredging mud with high fine particle content and poor permeability, it is easy to fail to achieve the expected reinforcement effect due to silting problems

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