Clogging preventing method for drainage channel based on underground high-flow-capacity drainage system

Abstract

The anti-silting method for drainage channels based on the underground large-flow drainage system is characterized in that it includes the following steps: After connecting the upper opening of the large-flow drainage body with a soft permeable pipe, press it into the ultra-soft soil to be treated until the design depth or the hard shell layer , reserve a section of soft permeable pipe higher than the ground; connect the soft permeable pipe to the drainage branch pipe, and connect the drainage branch pipe to the main drainage pipe, then connect the main drainage pipe to the water inlet of the sedimentation box, and the water outlet of the sedimentation box to connect The other section of the drainage main pipe is connected to the pump and the drainage pipe; and the sealing film and pressure groove are laid in the area where the drainage body is laid; the pump is turned on to vacuumize; according to the supersoft soil surface settlement rate and the expected treatment effect, choose the time to stop vacuuming . It can meet the requirements of the construction period and the uniformity of soil strength after drainage consolidation treatment, and realize the anti-silting treatment under the new idea of ​​"fine particle dredging".

Description

technical field [0001] The invention is an anti-silting method for a drainage channel based on an underground large-flow drainage pipe body, which is suitable for rapid water-soil separation or consolidation drainage pretreatment projects of ultra-soft soil such as dredging and filling soil, dredging silt and mud. Background technique [0002] With the development of tidal flat reclamation and construction in China, especially after my country’s “Twelfth Five-Year Plan” proposed to promote the development of marine economy, the requirements for the area of ​​the land area near the sea and the speed of development will inevitably increase, and land reclamation is one of the main measures. . Taking the reclamation project in Zhejiang as an example, during the "Eleventh Five-Year Plan" period, the total investment in reclamation was 20.2 billion yuan, and the completed reclamation area was 631,000 mu, which was 162% of the "Tenth Five-Year Plan". Reclamation of more than 1 mill...

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Problems solved by technology

However, under the requirements of the tensile strength of the plastic drainage board, the improvement of its core and filter membrane is also limited to a certain extent, and the problem of silting of the drainage board cannot be solved well; for the improvement of the molding and bonding method of the plastic drainage board, To a certain extent, it solves the blockage in the plate core caused by its own forming gaps and other factors, but as far as the ultra-soft soil with a large content of viscous fine particles is concerned, this improvement has little effect on the blockage of the filter membrane

Generally speaking, the traditional anti-silting method of plastic slabs is to prevent silting underground. The main considerations are the seamless formation of drainage channels and the reasonable adjustment of the surface structure of the filter membrane in order to reduce plate-shaped silting and fine particles of the filter membrane. Dependence, its technical requirements are relatively complex and the treatment effect is difficult to guarantee, and cannot meet the actual requirements of the general project

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