2results about How to "Improve soil properties" patented technology

The utility model belongs to municipal engineering technical field, concretely relates to a kind of shallow soft soil subgrade treatment combination structure in narrow site, comprising: replacement boundary line, roadbed replacement base layer, replacement demarcation line, ground line, excavation replacement slope line, cement soil mixing pile solid pile, cement soil mixing pile empty pile, cement solidification area and replacement granular material.Excavation replacement slope line starts from replacement demarcation line, and ends in replacement boundary line;Cement soil mixing pile solid pile is located below the area inside replacement boundary line road, its pile bottom is below replacement demarcation line, and pile top is cut off in excavation replacement slope line;Cement soil mixing pile empty pile is only as the "virtual section" that cement soil mixing pile solid pile body extends upwards;Cement solidification area is the area that replacement boundary line, cement soil mixing pile solid pile bottom and excavation replacement slope line, ground line are enclosed to form.The utility model can reduce the range of slope excavation, reduce the influence of excavation replacement subgrade treatment to surrounding environment and building structures.

The invention relates to the technical field of organic fertilizers, in particular to a compound organic fertilizer and a preparation method thereof. Comprising the following raw materials in parts by weight: 100-600 parts of an organic carbon fertilizer, 40-80 parts of a nitrogen fertilizer, 80-300 parts of a potassium fertilizer and 3-10 parts of a chelated trace element fertilizer. The organic leavening formed by synergistically combining chicken manure, cow dung and pig manure is used as a fertilizer raw material, so that waste is turned into wealth, and the preparation cost of the fertilizer is reduced. The multi-element chelated trace element fertilizer has a remarkable plant growth regulation effect, can effectively promote yield and income increase, and greatly improves the nutritional degree required by plants, so that the growth of crops can be greatly promoted; medium elements generated in the waste after microbial fermentation contain aromatic hydroxy carboxylic acid, carbohydrate, amino acid and protein, and have significant effects on improving soil properties, promoting crop growth and improving crop quality.