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Method for improving soft clay into planting soil

A soft clay and soil technology, applied in the field of soil remediation, can solve problems such as easy hardening, poor air permeability, and low water permeability, and achieve the effect of simple materials, less addition, and low price

Active Publication Date: 2021-03-23
CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Municipal road greening, landscaping and other projects require a large amount of planting soil, but because the clay content in soft clay soil and muddy soil is as high as 60% to 80%, its natural void ratio is between 1 and 1.5, and its water permeability is small and easy Compaction and poor ventilation cannot be directly used for green planting, so it is necessary to improve the soft clay soil and muddy soil to make the soil properties meet the requirements of green planting soil

Method used

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  • Method for improving soft clay into planting soil
  • Method for improving soft clay into planting soil
  • Method for improving soft clay into planting soil

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Effect test

Embodiment 1

[0026] Such as figure 1 , the embodiment of the present invention provides a method for improving soft clay into planting soil, comprising the steps of:

[0027] S1, mixing quicklime into the soft clay, making the soil dry and crushing;

[0028] S2, adding organic fertilizer and yellow sand to the crushed soil, mixing evenly, adding water for maintenance, so as to obtain planting soil.

[0029] The aforementioned soft clay is preferably soft clay soil, muddy soil, or the like. In one embodiment, the moisture content of the soft clay is 30-50%, and the clay content is 50-80%. The method provided in this embodiment has a good treatment effect on this kind of soft clay, and realizes turning waste into treasure.

[0030] In the above method, by adding quicklime to the soft clay, on the one hand, because the quicklime has hygroscopicity and exothermic properties, it can speed up the evaporation of water in the soft clay, reduce the water content of the soft clay, and help improve...

Embodiment 2

[0040] The embodiment of the present invention is a specific embodiment of the improvement method provided in the above-mentioned embodiment 1, through a pot test, to verify the improvement effect of the soil:

[0041] (1) Soil for test:

[0042] Abandoned silty soil produced at a construction site in Zhejiang has a moisture content of 36.9%, a pH of 6.1, and a dry density of 1.37g / cm 3 , wet density 1.86g / cm 3 , the specific gravity of soil particles is 2.74, and the clay content is 73.5%.

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Abstract

The invention relates to a method for improving soft clay into planting soil. The method comprises the following steps of S1, mixing quick lime into the soft clay, drying the soil, and performing crushing; and S2, adding organic fertilizer and yellow sand into the crushed soil, performing uniform mixing, and adding water for maintenance to obtain the planting soil. Starting from engineering and practical application, the method for improving the soft clay into the planting soil is provided, the mixing uniformity of the soil, the organic fertilizer and the yellow sand is enhanced in a manner ofdrying, crushing and then mixing the soil, meanwhile, the soil dispersity can be improved, and the soil treatment efficiency is improved. The quick lime is added into the soft clay, due to the fact that the quick lime has hygroscopicity and exothermicity, evaporation of water in the soft clay can be accelerated, the water content of the soft clay can be reduced, and soil dispersity can be improved.

Description

technical field [0001] The invention belongs to the technical field of soil restoration, and in particular relates to a method for improving soft clay into planting soil. Background technique [0002] Soft clay (soft cohesive soil, silty soil) is widely distributed in my country, mainly located in coastal areas, plains, inland lake basins, depressions and areas on both sides of rivers. With the development and construction of the city, a large amount of soft clay will be produced during foundation excavation. Due to its high compressibility, low bearing capacity and low shear strength, its physical properties do not meet the design requirements for foundation filling and cannot be directly Utilization; In the site restoration project, when the polluted soil is excavated for grading, a lot of grading clean soil will be produced. If the excavated clean soil is soft clay, silt soil and other soft clay, it is not suitable for backfilling the original foundation pit. If the soft...

Claims

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Application Information

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IPC IPC(8): A01B79/02A01G24/00A01G24/10A01G24/12
CPCA01B79/02A01G24/00A01G24/10A01G24/12Y02W30/40
Inventor 方园园别雪祥赵颖石德升宁智
Owner CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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