Preparation method of modified soil containing hydraulic fill sand and application method of modified soil containing hydraulic fill sand

An application method and soil improvement technology, applied in the fields of application, soil improvement machinery, agriculture, etc., can solve the shortage of planting soil and other problems, and achieve the goal of improving self-sufficiency, large pores, high air permeability and water and fertilizer retention Effect

Inactive Publication Date: 2020-04-28
CCCC TIANJIN DREDGING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems existing in the known technology, the present invention provides a preparation and application method of improved soil containing dredger-filled sand, which makes full use of the abundant dredged-filled sand resources on the dredged-filled land area, and improves the air permeability and water retention of the improved soil Fertilizer retention performance, while maximizing the solution to the shortage of planting soil on land reclamation, while reducing the high cost of transporting a large amount of common planting soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] A method for preparing and applying improved soil containing dredging sand of the present invention, wherein the preparation method includes the following steps, (1) using machinery to crush and screen the dried red loam to prevent the existence of particles with a particle size larger than (2) mix red loam with organic fertilizer to obtain planting soil; (3) mix dredging-fill sand and planting soil evenly to obtain dredged-fill sand improved soil, the quality of dredging-fill sand and planting soil The ratio is 1:X, where X=0.5~1.

[0016] In this embodiment, the particle size distribution of the dredging sand used in step (3) satisfies d 50 Less than 4.75mm. d of dredge sand particle size distribution 50 It refers to the normal distribution value of the dredger sand particle size, and the specific description is as follows:

[0017] d 50 It is a parameter of the particle size of the dredging sand, which means that 50% of the particle size is in the measured size v...

Embodiment 1

[0022] First, dry the collected red loam to reduce its water content, and use machinery to mash the red loam for improvement and sieve it to remove the soil and rocks with a particle size larger than 5cm. The planting soil is obtained after mixing the red loam soil and the organic fertilizer, and the soil particle diameter of the planting soil is 1.5-2 mm. The main components of planting soil are: organic matter content 16.4%, water-soluble salt content 4.2‰, available nitrogen content 458mg / kg, available phosphorus content 53.5mg / kg, available potassium content 221mg / kg.

[0023] Further, the dredging sand (d 50 4.75mm) and the planting soil are evenly mixed with the planting soil, so as to obtain the dredger-filled sand improved soil.

[0024] In this embodiment, the improved soil with dredging sand is applied to the planting of thick vines. For this reason, a planting ditch with a depth of 10 cm and a width of 20 cm was excavated with ditching equipment. After the thick r...

Embodiment 2

[0026] First, dry the collected red loam to reduce its water content, and use machinery to mash the red loam for improvement and sieve it to remove the soil and rocks with a particle size larger than 5cm. The planting soil is obtained after mixing the red loam soil and the organic fertilizer, and the soil particle diameter of the planting soil is 1.5-2mm. The main components of planting soil are: organic matter content 16.4%, water-soluble salt content 4.2‰, available nitrogen content 458mg / kg, available phosphorus content 53.5mg / kg, available potassium content 221mg / kg.

[0027] Further, the dredging sand (d 50 4.75mm) and the planting soil are evenly mixed with the planting soil, so as to obtain the dredger-filled sand improved soil.

[0028] In this embodiment, the improved soil with dredging sand is applied to the planting of bougainvillea. For this reason, a circular tree hole with a depth of 20 cm and a diameter of 45 cm is manually excavated. After the bougainvillea s...

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PUM

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Abstract

The invention relates to a preparation method of modified soil containing hydraulic fill sand and an application method of the modified soil containing the hydraulic fill sand. The preparation methodof the modified soil containing the hydraulic fill sand comprises the following steps: (1) crushing air-dried red soil by utilizing a machine, and carrying out sieving so as to prevent existence of earth and stone with particle sizes greater than 5 cm in a material pile; (2) blending the crushed red soil with an organic fertilizer so as to obtain cultivation soil; and (3) uniformly mixing hydraulic fill sand with the cultivation soil so as to obtain the modified soil containing the hydraulic fill sand, wherein the mass ratio of the hydraulic fill sand to the cultivation soil is 1 to X (X=0.5-1). The preparation method of the modified soil containing the hydraulic fill sand makes full use of the hydraulic fill sand which is abundant in hydraulic reclamation land areas; and moreover, the prepared modified soil containing the hydraulic fill sand is large in pore size, high in permeability and possessed of certain organic matters (biological residues). Therefore, modified soil containing the hydraulic fill sand prepared by the preparation method has higher air permeability, as well as higher water conservation performance and fertilizer conservation performance, compared with common red soil; and thus, the modified soil containing the hydraulic fill sand is capable of achieving good cultivation effects. The preparation method of the modified soil containing the hydraulic fill sandis capable of greatly decreasing dosage of common red soil, reducing transportation cost of cultivation soil, and improving self-sufficiency performance of the cultivation soil in the hydraulic reclamation areas; and thus, cost can be greatly reduced while being environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of soil improvement, in particular to a method for preparing and applying improved soil containing dredging sand. Background technique [0002] With the rapid development of social economy, human's demand for land is becoming stronger and stronger. In recent years, many countries in the world have generally adopted the method of land reclamation to solve this problem. Correspondingly, many land reclamation areas have appeared in many parts of the world. [0003] Compared with inland areas, the dredger-fill sand on the surface of the dredger-fill land area has lower organic matter content, poor water retention performance, and prominent salinization problems. In addition, the dredger-fill land area generally suffers from high-salinity, strong winds and other harsh environmental conditions, so it is extremely The land restricts the large-area planting and growth of green plants on the reclamation land. For ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B77/00
CPCA01B77/00
Inventor 尹德俊王建萌姚新陈将苗乃正
Owner CCCC TIANJIN DREDGING
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