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Method for improving and protecting collapsible loess slope project

A technology of collapsible loess and loess, which is applied in infrastructure engineering, excavation, construction, etc., can solve the problems that loess cannot meet the requirements of engineering strength and deformation, and achieve the effects of waste utilization, resource saving, and environmental protection

Inactive Publication Date: 2010-10-06
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a collapsible loess engineering control method, which is used to solve the engineering problems such as collapsibility of loess encountered in the construction of structures in loess areas and failure to meet engineering strength and deformation requirements.

Method used

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  • Method for improving and protecting collapsible loess slope project
  • Method for improving and protecting collapsible loess slope project

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Experimental program
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Embodiment

[0026] Embodiment: the method for improvement and protection of a certain collapsible loess slope engineering is as follows,

[0027] ① Level the site according to the requirements of the construction drawing, clear the floating soil and soft soil layer on the ground, remove the sewage on the ground, keep the ground dry and clean, lay the geogrid on the ground, and after laying level, use U-shaped steel bars to clamp into the soil and fix it;

[0028] ②According to the requirements of optimal water content and proportion, the lime fly ash improved loess should be blended and stirred. According to the construction drawings and site stakes, the sacks containing the improved loess and grass seeds should be placed at the foot of the slope. The short side is parallel to the filling direction, and then the improved loess is laid, the thickness is controlled within 30-50cm, and the required compaction is achieved by light rolling, and the first layer of rolling is completed;

[0029]...

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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...

Claims

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Application Information

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IPC IPC(8): E02D17/20
Inventor 李志清崔振东胡瑞林钟铎
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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