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Method for improving soil structure of coastal hydraulic fill soil by using fungus-bran-based composite super water-absorbent resin

A technology of super absorbent resin and soil structure, applied in the fields of land preparation methods, applications, agricultural machinery and implements, etc., can solve the problems of high salt content and poor physical structure, and achieve uniform soil distribution, low cost, and operability. strong effect

Inactive Publication Date: 2017-12-01
TIANJIN PORT (GROUP) COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Coastal dredging land reclamation is an important method and approach for many coastal cities to alleviate the conflict between man and land. However, the dredged fill soil formed by dredging fill has no soil-forming process and has been affected by seawater immersion for a long time. Problems such as poor physical structure have brought severe challenges to local ecological greening

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] It is carried out in the dredger fill soil improvement demonstration area near the intersection of Dongjiang Asia Road and Xingang No. 8 in Tianjin Port. The salt content of 1m soil in the area is in the range of 16-20g / kg, 7.52 Stand still, and when the water content of the topsoil reaches 16.25%, add water to the Agaric fungus bran-based composite superabsorbent resin to adjust the concentration to a hydrogel solution of 0.8g / L, flood irrigation, and the irrigation rate is 270L / m 2 Stand still, when the water content of the topsoil reaches 10.86%, add water to the Agaric fungus bran-based composite superabsorbent resin to adjust the concentration to a hydrogel solution of 0.5g / L, flood irrigation, and the irrigation rate is 350L / m 2 . After the improvement, the soil hydraulic conductivity can reach 9.03mm·h after washing with the same water head for 2 days -1 After 6 days, the desalination rate of 35cm topsoil is as high as 72%, and the desalination rate of 1m soil is...

Embodiment 2

[0025] Embodiment 2: Improve coastal dredging and filling soil and experimental conditions are the same as Example 1, the difference is that the superabsorbent resin of Agaricus edulis is used as the modifier, and the conditions of use and dosage are all the same as Example 1. After the improvement finishes, the same water head After leaching for 2 days, the soil hydraulic conductivity can reach 8.83mm h -1 ; After 6 days, the desalination rate of 35cm topsoil is as high as 68%, and the desalination rate of 1m soil is 38%; after 10 days, the salt content of 60cm topsoil will be below 3.8g / kg, pH1.5%.

Embodiment 3

[0026] Embodiment 3: The improvement of coastal dredging and filling soil and the experimental conditions are the same as in Example 1. The difference is that the superabsorbent resin of the mushroom chaff is used as a modifier, and the conditions of use and dosage are the same as in Example 1. After the improvement is completed, the same After 2 days of water head washing, the soil hydraulic conductivity can reach 8.50mm h -1 ; After 6 days, the desalination rate of 35cm topsoil is as high as 65%, and the desalination rate of 1m soil is 35%; after 10 days, the salt content of 60cm topsoil will be below 4.0g / kg, pH1.2%.

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Abstract

The invention relates to a method for improving the soil structure of coastal hydraulic fill soil by using fungus-bran-based composite super water-absorbent resin. The method comprises the following steps of adding water to adjust the fungus-bran-based composite super absorbent resin to be a hydrogel solution with the concentration of 0.2-1.5 g / L, and conducting irrigation, wherein the irrigation volume is 80-450 L / m<2>. According to the method, by adjusting and controlling the moisture content of the surface soil and the concentration index of the fungus-bran-based composite super water-absorbent resin solution, the viscous structure of the hydraulic fill soil is quickly improved, a stable granular soil structure is established, the organic matter and soil microbial environment is added, the permeability, water transmissibility and salt exclusion performance of the hydraulic fill soil can be significantly improved, a good migration channel for hydraulic fill soil water, fertilizer and salt is established, and the occurrence of secondary salinization is effectively avoided; meanwhile, the content of organic matter in the hydraulic fill soil can be increased, and the improved hydraulic fill soil satisfies the growth demand of landscaping plants.

Description

technical field [0001] The invention relates to a method for improving the soil structure of coastal dredging fill, in particular to a method for improving the soil structure of coastal dredging fill by using a fungus bran-based composite superabsorbent resin. Background technique [0002] Coastal dredging land reclamation is an important method and approach for many coastal cities to alleviate the conflict between man and land. However, the dredged fill soil formed by dredging fill has no soil-forming process and has been affected by seawater immersion for a long time. Problems such as poor physical structure have brought severe challenges to local ecological greening. The use of soil amendments is one of the important measures for dredging fill soil improvement. The main function of soil amendments is to improve the physical and chemical properties of the soil and increase the nutrient content of the soil. [0003] In recent years, more and more scholars have begun to stu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/00
CPCA01B79/00
Inventor 万建华
Owner TIANJIN PORT (GROUP) COMPANY
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