A deformable straw drainage body and a method of vacuum dewatering and special-shaped pile solidification and reinforcement for silt foundation anti-silting

Abstract

The invention relates to a deformable straw drainage water body and a method of silt foundation silt-prevention vacuum precipitation and special-shaped pile solidification and reinforcement. A plurality of positioning plates and sliding plates are sequentially arranged at intervals and connected in series through a straw rope to form a columnar structure, and the outer surface columnar structure is covered with a biodegradable flexible permeable filter cloth to finally form an ecological drainage water body; through intermittently applying positive pressure, the drainage water body has expansion and contraction performance, after drainage, a solidified soil pile is formed by injecting fluid fillers, and the diameter of the solidified soil pile can be manually controlled to form special-shaped piles of various shapes; and the straw rope plays a reinforcing role in solidified soil, and according to the formed special-shaped piles, compared with traditional equal-diameter piles, bearing capacity of the piles can be greatly improved. In conclusion, according to the deformable straw drainage water body and the method of silt foundation silt-prevention vacuum precipitation and special-shaped pile solidification and reinforcement, drainage capacity and the drainage efficiency are improved, and strength of the solidified soil pile is improved at the same time.

Description

technical field [0001] The invention relates to a deformable straw drainage body and a method for preventing silt foundation by vacuum dewatering and solidifying and reinforcing special-shaped piles, belonging to the field of foundation treatment. Background technique [0002] River dredging, engineering construction, and sewage treatment will generate a large amount of waste mud, which needs to be disposed of in the yard. Waste mud has high moisture content, high clay content, low strength, poor drainage performance, long-term occupation of a large number of storage yards, resulting in a great waste of land resources. Vacuum preloading technology is a commonly used soft ground treatment technology, which has been widely used Used to dispose of waste sludge in the yard. In the traditional vacuum negative pressure loading method, firstly, a plastic drainage board is laid in the soil, and then the drainage pipe network, sand cushion, sealing film, etc. are laid, and finally a...

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Problems solved by technology

However, in this invention, due to the use of a solid straw drainage body, the water permeability of the straw drainage body is limited, and when the solidified material slurry is injected, the grouting pressure is high and the grouting time is long

[0006] The patent application number is 201611189056.1, and the Chinese patent titled "expansion-contraction drainage device and sludge positive and negative pressure drainage method" discloses a new type of expansion-contraction drainage body, which uses positive and negative pressure to make the filter outside the drainage core plate Cloth expands or shrinks to achieve the purpose of forming cracks in the silting layer around the drainage body, thereby improving the treatment effect; however, the drainage body in this invention adopts a solid structure, so the water permeability of the drainage body is also limited

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