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Coastal saline soil improvement method

A technology of sea salt and saline soil, applied in water conservancy projects, artificial islands, underwater structures, etc., can solve problems such as fundamentally controlling coastal saline-alkali soil and blocking seawater infiltration

Active Publication Date: 2011-04-27
史汉祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the seawater submerges the land, dams can be built to stop it; if the seawater flows back into the river, sluices can be built to stop it; but if the infiltration of seawater cannot be effectively blocked, it will be difficult to fundamentally control the coastal saline-alkali soil

Method used

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  • Coastal saline soil improvement method
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  • Coastal saline soil improvement method

Examples

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Effect test

Embodiment

[0030] Somewhere in the south, 500 hectares of coastal salt land renovation project.

[0031] The 500 hectares of coastal salt land in the project was formed by reclamation from the sea. It is long strip, with an average length of about 5,000 meters from north to south, and a width of about 1,000 meters from east to west. Near the mouth of the river, alluvial silt is within 8 meters underground.

[0032] Seawalls have been built during land reclamation, effectively preventing seawater inundation, and there is no need to rebuild seawalls.

[0033] Build anti-seepage walls around the north, east, and south sides of the coastal salt land: starting from the west end of the north, going to the east, then to the south, and finally to the west end of the south, three rows of grouting holes are drilled in sequence in an equilateral triangle. The depth is 5 meters, and the distance between two adjacent grouting holes is 5 meters; each hole is drilled with cement slurry in time to avoi...

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Abstract

The invention relates to a method for improving coastal saline soil. The method comprises the following steps of building an anti-seepage wall to block seawater from infiltrating, cutting off salt supplement source and coordinating with other measures so as to progressively desalt the coastal saline soil and then change the coastal saline soil into arable land. The anti-seepage wall is formed through the following steps that three rows of grouting holes arrayed in a regular triangle are drilled; cement paste is injected into the grouting holes in turn by a grouting pump; the cement paste permeates a rock-soil layer; the grouting speed is controlled; the permeation distance of the cement paste is guaranteed, so as to ensure that the cement paste injected into adjacent grouting holes is closely connected together; after the cement paste is injected into the rock-soil layer, the cement paste is condensed with the rock-soil layer together so as to form the anti-seepage wall which blocks the seawater from infiltrating. The other measures comprise measures of building a seawall, a brine drainage system and a pipeline irrigation system and applying soil conditioner.

Description

technical field [0001] The invention relates to a method for improving soil, in particular to a method for improving coastal saline soil, and belongs to the technical field of international patent classification A01B. Background technique [0002] Saline-alkali soil is a soil type widely distributed on the earth, which is formed by the accumulation of a large amount of saline-alkali components in the soil due to various reasons. The saline-alkali composition of soil includes different ions such as Cl - , SO 4 2- , CO 3 2- 、HCO 3 - 、Na + 、K + , Ca 2+ , Mg 2+ etc., when these ions gradually accumulate in concentrations sufficient to adversely affect soil properties and plant growth, they become saline-alkali components. Due to the accumulation of a large amount of saline-alkali components, a series of soil physical properties deteriorate: sticky structure, poor air permeability, high bulk density, slow rise in soil temperature, poor activity of aerobic microorganism...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D29/045
Inventor 史汉祥
Owner 史汉祥
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