Environment-friendly and efficient dewatering and drying method for dredged ultra-soft soil

Abstract

The invention discloses an environment-friendly and efficient dewatering and drying method for dredging ultra-soft soil. The method comprises the steps that S1, working cushion layers are laid in a storage yard, specifically, the working cushion layers are laid in a dewatering and drying area of a dredging ultra-soft soil stacking yard and the top of an ultra-soft soil body; s2, arranging an air exhaust assembly, a water drainage assembly, a temperature control assembly and a pressure control assembly in the soil body; s3, a soil body closed environment is constructed; step S4, dehydrating and drying the soil body in stages through a temperature and pressure double-control technology, wherein the temperature and pressure double-control technology comprises an air exhaust and water drainage test extraction stage in the first stage, a vacuum test air exhaust load reaching stage in the second stage and a temperature and pressure double-control stage in the third stage; and S5, when the membrane top of the dredged ultra-soft soil body settles stably and drainage of the drainage assembly fails, operation is stopped. According to the method, materials and reagents are not added into the soil body, moisture in the dredged ultra-soft soil can be discharged in an environment-friendly and efficient mode, the size of the dredged ultra-soft soil is efficiently reduced, the space of a storage yard is enlarged, the treatment period is short, construction is convenient, and treated bottom mud can be recycled.

Description

technical field [0001] The invention relates to the technical field of foundation reinforcement, in particular to an environmentally friendly and efficient dehydration and drying method for dredging supersoft soil. Background technique [0002] In recent years, the general public has increasingly urgent demand for ecological products, the government has paid more and more attention to environmental governance, and there are more and more projects for environmental protection of rivers, lakes and reservoirs. [0003] At present, environmental protection dredging of ultra-soft soil is an important means to reduce the internal source pollution of rivers and lakes and reduce the pollution load of rivers and lakes. Dredged ultra-soft soil has the characteristics of high water content, high compressibility, and difficulty in dehydration. Without pretreatment, it is difficult to directly use it as construction land or resource utilization. [0004] It should be noted that the wate...

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Problems solved by technology

[0006] However, there is no technology at present that can efficiently and quickly reduce the volume of dredged supersoft soil so that more polluted sediment (that is, dredged supersoft soil) can be stored in the limited space of supersoft soil stockpile, and can be processed The construction period is short, the construction is convenient, and the treated sediment can be used as a resource

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