Drainage plate for silt consolidation, filter cloth and drainage plate core

Abstract

The invention is the improvement on a longitudinal drainage plate for silt consolidation, filter cloth and a drainage plate core, which is characterized in that fibrous hot-pressed microporous filter cloth is planar filter cloth hot-rolled by a flat roller, the filter cloth is adhered to the surfaces of convex ribs of the drainage plate core through thermal thawing or a chemical way, the filter cloth adopts silk reeling and hot-press forming separation technology, and the drainage plate core is made of co-polypropylene, thereby overcoming the disadvantages of the prior art; and the aperture of the filter cloth can be adjusted according to treated silt, the drainage plate is difficult to block, the engineering on a soft foundation after the treatment cannot have the settlement after the construction and has smooth drainage and high drainage efficiency, and the plate core has long effective service life.

Description

technical field [0001] The invention is an improvement to the plastic drainage board used for vertical drainage of silt consolidation, and in particular relates to a drainage board structure, a filter cloth and a board core with good anti-silting performance and smooth drainage. Background technique [0002] Drainage boards for soft ground consolidation treatment drainage, such as the drainage boards disclosed in Chinese patents CN1182153 and CN2281365, have a structure composed of plastic drainage board cores and overlapping overlapping filter cloths, and the overlapping layers are bonded by adhesives. This kind of drainage board formed by overlapping and lapping the core will cause the overlapping and overlapping parts to separate due to the construction insertion operation during use, and the silt will easily enter the drainage board core from the separated superimposed surface, resulting in Second, the filter cloth wrapping structure, the filter cloth is simply wrapped o...

AI Technical Summary

Problems solved by technology

This kind of drainage board formed by overlapping and lapping the core will cause the overlapping and overlapping parts to separate due to the construction insertion operation during use, and the silt will easily enter the drainage board core from the separated superimposed surface, resulting in Second, the filter cloth wrapping structure, the filter cloth is simply wrapped on the surface of the drainage plate core, the filter cloth is poor in tension, so the filter cloth is weak against lateral pressure, and it is easy to produce depressions in the drainage grooves, and the filter cloth Cloth sag will reduce the water flow of the drainage board, which will affect the speed and effect of silt consolidation

Moreover, the existing filter cloth is a microporous geotextile formed by hot-rolling the spot roll after paving the chemical filament fiber. After setting the shape, it is generally not replaced, resulting in the thickness of the long fibers of the filter cloth cannot be adjusted, so the pore size of the filter cloth is fixed and cannot be adjusted. The existing technology takes into account various applications. The pore size of the filter cloth is usually set at 40-55 μm, while the pore size If it is too fine, it is easy to cause clogging; if the pore size is too large, it will also cause clogging due to the entry of mud

In practical application, due to the different properties of sludge, its particle size is also different, so the filter cloth with fixed pore size has poor adaptability and may easily cause filter cloth blockage; part of the permeable hole), the concave-convex structure filter cloth is prone to silt adhesion to the concave surface, and the silt adhesion is also likely to cause filter cloth silting

The above-mentioned various blockages will cause the failure of the drainage channel, so that the entire vacuum preloading consolidation treatment of the soft foundation will fail, and the desired effect will not be achieved.

In addition, the existing filter cloth is formed by hot pressing of pure chemical fibers. The chemical fibers are not easy to rot in the silt, so that the drainage channels can filter water for a long time, and the bottom water can easily flow out through the drainage channels. settlement

Therefore, in the existing drainage board with the above-mentioned structure, the problems of clogging, poor drainage and post-construction settlement have not been effectively solved, and have existed for a long time, becoming a major technical obstacle

[0003] In addition, the core of the existing drainage board is made of polypropylene material with relatively low price and low ductility. The toughness of polypropylene is relatively poor, and the tongue-shaped tear is ≤5N. Shrinkage and deformation can easily cause longitudinal cracking of the core plate (similar to the weak longitudinal tear resistance of the tear belt), resulting in shortened actual effective service life, and this defect also exists for a long time

[0004] Therefore the deficiencies of the prior art drainage board exist objectively, and there is still room for improvement

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