Method for improving and protecting collapsible loess slope project

Abstract

The invention relates to a method for improving and protecting a collapsible loess slope project, which is characterized in that: the loess slope project is protected by adopting improved loess (3), gunny bags (4), a protective net (5), a geogrid (6) and a drainage ditch (8), wherein the improved loess is prepared by stirring and blending lime, fly ash and loess in a volume ratio, the total volume of the lime and fly ash accounts for no less than 30 percent of the volume of the admixture, the SiO2 and Al2O3 total content of the fly ash is no less than 75 percent, and the lime is calcium quicklime or calcium hydrated lime; the geogrid (6) is high-density polyethylene uniaxial geogrid; the gunny bags (4) are jute gunny bags; and the protective net (5) is made of a flexible stainless steel material. The method has the advantages of stabilizing the slope, solving the stability problem of the fill slope, realizing waste utilization, afforesting the environment and preventing soil erosion by improving the structural protective system consisting of the loess and geogrid; and the method is suitable for improving the collapsible loess project in civil engineering and can be used for projects such as highway embankment filling, building foundation improvement, retaining wall reinforcement and the like.

Description

technical field

[0001] The invention relates to a civil engineering design and construction method, which belongs to the field of new civil engineering technologies. Background technique

[0002] Loess has engineering characteristics such as large porosity, water sensitivity, and collapsibility. For large-scale projects such as expressway roadbeds and ballastless track roadbeds, loess must be improved to reduce its compressibility significantly, and its strength and water stability are greatly improved. Improve, thereby eliminating the collapsibility of loess.

[0003] Compared with ordinary soil, fly ash has good engineering characteristics such as high strength, light weight, low compressibility, and good water permeability. It has good social and economic benefits when used as roadbed filler. Cement is a powdery hydraulic inorganic gelling material. It can be mixed with water to form a slurry. It can be hardened in air or better hardened in water, and can firmly bind san...

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