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Saline-alkaline land remediation structure and method based on river channel sediment recycling

A technology for river bottom mud and structure repair, applied in chemical instruments and methods, restoration of contaminated soil, sludge treatment, etc., to achieve the effects of easy disassembly, installation and construction, wide application range, and improved use effect

Active Publication Date: 2019-05-31
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a saline-alkali land restoration structure and restoration method based on the resource utilization of river sediment, so as to solve the problem that the resource utilization of existing river sediment proposed in the above-mentioned background technology has become the main way of processing river sediment. The clay content in the river bottom mud is high and rich in nutrients. It is very useful for improving the soil properties of sandy saline-alkali land and the growth of faeces and plants, thereby improving the ecological environment and generating economic benefits, and realizing the resource utilization of river bottom mud question

Method used

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  • Saline-alkaline land remediation structure and method based on river channel sediment recycling
  • Saline-alkaline land remediation structure and method based on river channel sediment recycling
  • Saline-alkaline land remediation structure and method based on river channel sediment recycling

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Embodiment 1

[0031] see Figure 1-3 , an embodiment provided by the present invention: a saline-alkali soil restoration structure based on the resource utilization of river sediment, including a saline-alkali soil base layer 11, a partition layer 12, a reinforcement layer 13 and an improved soil layer 7, and the saline-alkali soil base layer 11 is provided with at least one The repair tank, the depth of the repair tank is 80 cm, and the bottom of the repair tank is distributed parallel to the surface of the saline-alkali base layer 11, the partition layer 12 is laid on the upper surface of the saline-alkali base layer 11 inside the repair tank, and the top of the partition layer 12 is provided with a reinforcement layer 13 , the reinforced layer 13 is laid by weathered and dried river bottom mud, the thickness of the reinforced layer 13 is 3 cm, and the maximum is not more than 10 cm, the top of the reinforced layer 13 is provided with an improved soil layer 7, and the improved soil layer 7 i...

Embodiment 2

[0040] The difference between this embodiment and embodiment 1 is that;

[0041] The depth of the repair groove is 85 cm.

[0042] The thickness of the reinforcing layer 13 is 5 cm.

[0043] The thickness of the brick body 2 is 5 cm, and the width and length of the brick body 2 are both 25 cm.

[0044] In the S1 step, the brick body 1 is fired at a temperature of 800 degrees Celsius inside the brick kiln, and the firing time is 4.5 hours.

[0045] Others are the same as embodiment 1.

Embodiment 3

[0047] The difference between this embodiment and embodiment 1 is that;

[0048] The depth of the repair groove is 90 cm.

[0049] The thickness of the reinforcement layer 13 is 8 cm

[0050] The thickness of the brick body 2 is 4 centimeters, and the width and length of the brick body 2 are both 20 centimeters;

[0051] In the S1 step, the brick body 1 is fired at a temperature of 900 degrees Celsius inside the brick kiln, and the firing time is 4 hours.

[0052] Others are the same as embodiment 1.

[0053] Working principle: During the laying of the brick body 2, since the arc-shaped ends of the two adjacent brick bodies 2 are matched with the arc-shaped limiting groove 5, the fixing bolt 6 is passed through the adjacent brick body 2. The installation hole 1 and the limit hole 4 make the two adjacent brick bodies 2 closely match each other to form an isolation layer 12. The isolation layer 12 is used to block the capillary action of the soil on the groundwater and preven...

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Abstract

The invention discloses a saline-alkaline land remediation structure based on river channel sediment recycling, comprising a saline-alkaline land foundation layer, a separator layer, a reinforcing layer and an improved soil layer; the saline-alkaline land foundation layer is provided with at least one remediation channel. The remediation channels above the reinforcing layer are filled with the improved soil layer made by mixing river channel sediment and sandy soil; halophytes are planted above the improved soil layer; therefore, the utilization issue of the river channel sediment is solved. The sandy saline-alkaline land with low clay content is improved through the river channel sediment with high clay content; therefore, soil quality of the sandy saline-alkaline land is improved, permeability of the sandy saline-alkaline land is decreased, gaps in the soil are decreased, less water evaporates, and water and soil are immobilized. Soil fertility is improved through organics in the river channel sediment; therefore, plant growth is benefited, and economic benefit is produced. Salts in the saline-alkaline land are absorbed through the growth of the halophytes so as to remediate thesaline-alkaline soil, so that river channel sediment is recycled and the natural environment is improved.

Description

technical field [0001] The invention relates to the technical field of resource utilization of river bottom mud, in particular to a saline-alkali land restoration structure and a restoration method based on the resource utilization of river bottom mud. Background technique [0002] Bottom mud is the sediment of rivers and lakes, and is an important part of natural waters. When waters are polluted, some pollutants in the water can be stored in the bottom mud through sedimentation or particle adsorption, and released under appropriate conditions, becoming a secondary pollution source. , This kind of pollution is called sediment pollution. In recent years, with the rapid development of industry, water bodies such as rivers and lakes have been seriously polluted. Refractory pollutants accumulate and gradually enrich in the bottom mud of water bodies. All over the country are focusing on the improvement of black and smelly rivers in cities. Among them, river dredging is one of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00C02F11/121C02F11/10C02F11/145C02F11/00
Inventor 韦学玉周振淞王柯宜宋程宇万继国孙浩吴硕杨晓凡
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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