Drainage board and construction method for treatment of tidal flat reclamation area

Abstract

The invention discloses a drain board used for reclaimed coastal region treatment and a construction method. The drain board comprises a drain board body, wherein first draining grooves are uniformly distributed on the drain board body; second draining grooves are uniformly distributed on the drain board body; the second draining grooves communicate with the first draining grooves; and draining holes are uniformly distributed on the drain board body. Meanwhile, the construction method applying the drain board comprises the following steps: (a), measuring and setting out; (b), site levelling; (c), setting cushion laying; (d), pile lofting; (e), drain board laying; (f), cleaning and cutting off; (g), sand pouring and pit filling; (h), geotechnical cloth laying; (i), plastic film mulching and air exhausting; and (j), settlement observation plate burying. The drain board and the construction method have the advantages that the draining capacity is high; the application range is wide; the labor intensity is small; construction cost is reduced; construction is convenient; construction efficiency is high; project construction cost can be lowered, and the project construction cycle is shortened; and the investment benefit of the project is enhanced.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a drainage board and a construction method for treating sea flat reclamation areas. Background technique [0002] At present, most of the fillers used in my country's land reclamation projects are silty soil or organic clay and other weak permeability, high saturation, low strength, and high rheological soft dredging fill. Due to the extremely high moisture content of the soil and the extremely low strength and bearing capacity, the related treatment of the foundation cannot be carried out in time. In addition, a large amount of dredged silt is produced every year in my country's inland waterways and lakes. The long-term stacking of dredged silt to dry in the sun will pollute and waste the environment and land resources to a certain extent. As far as the sea reclamation project of dredging silt soil is concerned, it is necessary to pre-drain the ...

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Problems solved by technology

[0003] At present, the treatment methods for shallow supersoft soil in land reclamation projects mainly include: First, natural drying: this method generally requires at least one year to dry and is easily affected by the weather, and the construction efficiency is very low

Second, artificially insert shallow treatment depth vertical plastic drainage boards on floating platforms or pre-laid geotextiles or grids combined with vacuum preloading method for drainage treatment. Due to the high moisture content and low permeability of silt, it is generally necessary to Vacuum preloading takes 1 to 3 months. At the same time, due to the large amount of deformation of the dredged silt, the ordinary plastic drainage board will be bent at a large angle, which will affect the transmission of vacuum and the smoothness of the drainage channel.

The drainage method of dredged silt mainly pre-sets rigid vertical and horizontal drainage channels in the yard to carry out vacuum water absorption treatment on the silt. This method can greatly accelerate the drainage rate of the silt, but the pre-set drainage body has certain requirements for the silt filling process. Moreover, the recovery of the treated rigid drainage body is relatively cumbersome, so this method is not suitable for drainage projects of large-area dredging fill or dredging soil

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