A felt pad for improving coastal saline soil and its preparation method and method for improving coastal saline soil

Abstract

The invention provides a felt pad for improving coastal saline soil, a preparation method thereof and a method for improving coastal saline soil. The felt pad for improvement of coastal saline soil comprises the following raw material components in parts by weight: 100-120 parts of mineral wool fibers, 5-20 parts of wood chips, 5-20 parts of straw and 10-15 parts Parts of zeolite powder. The mat provided by the present invention achieves a balance between salt resistance, anti-reverse seepage and water retention through the mutual cooperation of various components, and only needs to be laid with a thinner thickness to achieve excellent salt resistance and anti-reverse seepage effects and water retention, it is beneficial to reduce the depth of the excavated pit, reduce the amount of construction, and is suitable for coastal areas with high groundwater levels; the material provided by the invention is in the form of sheets, which can be directly laid on the bottom of the pit without dumping, paving and The compaction step avoids the splashing of salt-resistance materials, which has the advantages of convenient construction and labor cost saving. In addition, the sheet structure is convenient for construction on the side wall of the pit, and is suitable for the implementation of side salt-resistance.

Description

technical field [0001] The invention relates to the field of soil improvement, in particular to a felt pad for improving coastal saline soil, a preparation method thereof and a method for improving coastal saline soil. Background technique [0002] In recent years, the coastal area has become an important position for the development of my country's "blue economy". With the development of the coastal area, a large number of industrial transfers and population transfers have occurred, and the demand for supporting urban construction has become higher and higher. The urban construction in the region is of great significance to the development of "blue economy". Greening construction and landscape development are important components of urban construction in coastal areas. However, the soil and groundwater in coastal areas have high salt content, forming saline soil, which seriously restricts the normal growth and development of green plants in coastal areas, thereby increasing ...

AI Technical Summary

Problems solved by technology

Commonly used salt-blocking materials include stones, river sand, slag, ceramsite, vermiculite, corn straw, etc. Although soil desalination and secondary salinization can be prevented within a certain period of time, there are still the following limitations: 1. To ensure The effect of salt resistance requires the laying of a thicker salt barrier layer, such as laying 30-50cm thick stones. However, for coastal areas, the groundwater level is high (about 1-3m from the ground), considering the space requirements for plant root growth, so An overly thick salt-blocking layer cannot be set; 2. Although the above-mentioned salt-blocking materials can play a certain role in salt-blocking, they do not have water-retaining performance or have low water-retaining performance; 3. For light granular salt-blocking materials, such as River sand, slag, ceramsite, vermiculite, etc., are likely to cause splashes when the soil is backfilled, resulting in uneven distribution of materials and affecting the salt blocking effect; 4. The labor cost of laying out the salt barrier layer by dumping, paving, and compacting is relatively high. High, long construction time; 5. For materials such as corn stalks that are easily decomposed by the soil, they cannot exert the salt-resistance effect for a long time, and are prone to return to salt; 6. The existing salt-resistance materials have certain fluidity and are not applicable For salt resistance on the side, it is difficult to arrange on the side wall of the pit, and it is easy to flow downward and accumulate, which affects the salt resistance effect

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