Coastal saline-alkali soil terrace type afforesting method for improvement of dredger fill

A technology of dredger fill and saline-alkali land, which is applied in the greening field of coastal saline-alkali land terraced dredger fill improvement, which can solve the problems of salt accumulation on the soil surface, increased environmental risks, and slow short-term effect, so as to accelerate water infiltration and avoid salt accumulation Phenomena, effects of protecting natural resources

Inactive Publication Date: 2013-08-28
TIANJIN TA LANDSCAPE PLANNING & DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the shortage of water resources in the coastal areas, the salinization of the surface soil is intensified, and it is difficult for landscaping plants to survive here, which seriously affects the greening survival rate of coastal saline-alkali land.
[0003] At present, there are many mature saline-alkali soil improvement measures for original soil greening in coastal saline-alkali areas, mainly including (1) physical improvement, such as leveling the ground, deep plowing and sunning, raising the ground with foreign soil, micro-area soil improvement, and large-hole soil preparation. Soils with low water level and below moderate salinity have a certain improvement effect, but for areas with high water level, under the action of soil capillaries, the phenomenon of salt return will still occur, resulting in the accumulation of salt in the surface layer of the soil and hardening, making it difficult for plants to survive; (2 ) Improvement of water conservancy projects, such as drainage and irrigation, storage of li

Method used

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  • Coastal saline-alkali soil terrace type afforesting method for improvement of dredger fill
  • Coastal saline-alkali soil terrace type afforesting method for improvement of dredger fill
  • Coastal saline-alkali soil terrace type afforesting method for improvement of dredger fill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A partial shape of terraced dredger fill in coastal saline-alkali land, characterized in that the partial shape includes from bottom to top: seepage ditch 1, base terrain dredge fill 2, straw curtain 3, geotextile 4, and improved planting soil 5 , local shape 6, inspection well 7; the seepage ditch 1 is excavated longitudinally at the lowest point of the dredging fill soil 2 of the foundation terrain as a square seepage trench of 0.5×0.5m, and filled with ballast with a particle size of 10cm; the dredge fill soil 2 of the foundation terrain is 1m, slope 15°, laid 30cm-thick and compacted straw 3 on the dredging fill soil of the foundation terrain, spread geotextile 4 on the straw curtain, and spread planting soil 5 after transformation on the geotextile, and built the construction width on the planting soil. For terraced fields with a ridge height of 1m, a ridge height of 1m, and a ridge slope of 45°, 0.2m high soil ridges are set on the outer edge of the field surface, ...

Embodiment 2

[0043] A partial shape of terraced dredger fill in coastal saline-alkali land, characterized in that the partial shape includes from bottom to top: seepage ditch 1, base terrain dredge fill 2, straw curtain 3, geotextile 4, and improved planting soil 5 , local shape 6, inspection well 7; the seepage ditch 1 is excavated longitudinally at the lowest point of the dredging fill soil 2 of the foundation terrain as a square seepage trench of 0.5×0.5m, and filled with ballast with a particle size of 12cm; the dredge fill soil 2 of the foundation terrain is 1.5m, slope 20°, 25cm thick and compacted straw 3 is laid on the dredging fill soil of the foundation terrain, geotextile 4 is spread on the straw curtain, and the transformed planting soil 5 is spread on the geotextile, and the building is built on the planting soil For terraced fields with a width of 0.5m, a ridge height of 1.0m, and a ridge slope of 45°, 0.2m high soil ridges are set on the outer edge of the field surface, and 0...

Embodiment 3

[0045] The greening method of improving the local shape of the coastal saline-alkali land terraced dredging fill is characterized in that it is carried out according to the following steps:

[0046] (1) Clean up the site and make the basic terrain: compact the air-dried blown fill in layers until the ground is 1m high and the slope is 25°; the air-dry blown fill refers to the blown fill of rivers or ports Soil, the soil properties are: sandy soil, sandy loam soil, the total salt content is as high as 0.8-1.9%, the pH value is 7-8, and the water content is 12%-15%;

[0047] (2) Excavate seepage ditches at the lowest point of the slope bottom: excavate a square seepage ditch of 0.5×0.5m longitudinally at the lowest point of the slope toe, and fill it with ballast with a particle size of 10cm to collect water drained from the drenching layer; the highest point of the seepage ditch to The lowest point has a slope of 0.3%; the lowest point is connected to Well 7 of the Greenfield I...

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Abstract

The invention discloses a coastal saline-alkali soil terrace type afforesting method for improvement of dredger fill. The coastal saline-alkali soil terrace type afforesting method for improvement of the dredger fill comprises water seepage ditches, foundation terrain dredger fill, straw curtains, geotechnical cloth, improved planting soil, local models and the like, wherein square seepage ditches of the water seepage ditches are longitudinally excavated in the lowest position of the foundation terrain dredger fill, particle-size ballast stones are filled into the square seepage ditches, the distance between the foundation terrain dredger fill and the ground is 1-1.5m, the gradient of the foundation terrain dredger fill is 15 degrees to 30 degrees, straw is distributed on the foundation terrain dredger fill, the geotechnical cloth is laid on the straw curtains, and then the improved planting soil is laid on the geotechnical cloth. Due to the fact that the coastal saline-alkali soil terrace type afforesting method for improvement of the dredger fill is combined with the terrace type shape, the coastal saline-alkali soil terrace type afforesting method for improvement of the dredger fill is beneficial to retaining rainwater, enables salinity to be effectively leached and reduced, is beneficial to fertilizer and soil conservation, and enables the survival rate of landscape plants to be more than 90%, the waste is effectively utilized, natural resources are protected, and afforesting cost is reduced by more than 50%.

Description

technical field [0001] The invention belongs to the technical field of landscaping engineering, and relates to a method for designing landscaping, in particular to a greening method for improving coastal saline-alkali land terraced fields by dredging and filling. Background technique [0002] The formation of alkaline soil and alkalized soil in my country is mostly related to the accumulation of carbonate in the soil, so the degree of alkalization is generally high, and plants in severe saline-alkali soil areas can hardly survive. As one of the main types of saline-alkali land in my country, coastal saline-alkali land has the characteristics of large area, large regional differences, and difficulty in improvement. In particular, the afforestation of the original saline-alkali soil and dredger fill in the coastal area has always been a problem that has plagued the greening construction of the port for a long time. In the past, the landscaping in the port area mostly adopted ...

Claims

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Application Information

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IPC IPC(8): A01B79/02A01B77/00A01G1/00
CPCY02A40/22Y02P60/40
Inventor 张松涛胡月楠刘畅周鹏涛
Owner TIANJIN TA LANDSCAPE PLANNING & DESIGN CO LTD
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