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

Abstract

A clogging preventing method for drainage channel based on an underground high-flow-capacity drainage system comprises connecting the upper opening of a high-flow-capacity drainage body with a flexible water permeable pipe, and pressing into to-be-treated super-soft soil until reaching a design depth or hard shell course while reserving a section of the flexible water permeable pipe above the ground; connecting the flexible water permeable pipe with a drainage branch pipe, connecting the drainage branch pipe in a centralized way to a drainage main pipe, connecting the drainage main pipe to the water inlet of a sediment box and connecting the water outlet of the sediment box to another section of drainage main pipe and further to a pump and a drainage pipe; arranging a seal film and pressing a groove in the region where the drainage body is arranged; starting up the pump for evacuation; and choosing the time for stopping evacuation according to the super-soft soil surface settlement rate and predicted treatment effects. The invention can satisfy the requirement for construction period and strength uniformity of soil mass after drainage consolidation treatment, and realizes clogging preventing and treatment based on 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 my country, 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...

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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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