Process for improving heavily salinized soil in saline-alkali wasteland by using capillary pervious drain belt

Abstract

The invention provides a process for improving heavily salinized soil in a saline-alkali wasteland by using a capillary pervious drain belt. The capillary pervious drain belt is designed on a soft thin plastic sheet which is 200mm in width and 2mm in thickness; capillary pores which are 1mm in diameter are formed every 1.5mm; a ditch which is 0.3mm in width is longitudinally formed in each capillary pore by cutting; the surface of each water absorbing ditch is downwards when the ditch is embedded. The process disclosed by the invention realizes scientific water control management and effectively makes the soil be breathable; moreover, the capillary pervious drain belt is directly laid in the soil, and a well needs not to be checked, so the cost is low, convenience is provided for maintenance, a self-cleaning function is provided, the building cost of projects is lowered, and lots of sand resources are saved.

Description

technical field [0001] The invention relates to the technical field of saline soil improvement, in particular to a process for improving heavy loamy saline soil in saline-alkali flats with capillary permeable drainage belts. Background technique [0002] At present, the traditional saline-alkali land drainage materials are PVC mesh pipes, corrugated pipe blind pipes or loofah-shaped plastic pipes. These pipes are buried in the soil and need to be wrapped with geotextiles and the bottom plate of the pipe needs to be tamped, and coarse and fine sand filter layers should be added around the pipe. . These procedures and materials, on the one hand, increase the project cost and cost. On the other hand, because the drainage method adopts the principle of gravity drainage based on head pressure, it is very easy to cause after 1-2 years: ①The opening of the drainage pipe is blocked; ② The fine particles in the drainage pipe are silted, and the drainage is blocked; ③The covered filt...

AI Technical Summary

Problems solved by technology

The inspection well is the hub of the pipe connection of the salt drainage system. The distance between the inspection wells is generally 30-40m. In a large area of ​​saline-alkali land, dense inspection wells not only affect the beauty of the landscaping, but also greatly increase the cost of the entire saline-alkali renovation.