Soft rock disintegrating soil modifier and preparation method thereof, and soft rock disintegrating soil improvement method

Abstract

The invention discloses a soft rock disintegrating soil modifier, a preparation method thereof, and a soft rock disintegrating soil improvement method. The raw materials for preparing the soft rock disintegrating soil modifier include: sodium alginate, bentonite, nano-scale alumina, glucose, viscose Thickening agent, diluent, fiber, acid solution, cationic polymer; fiber includes any one or more of plant fiber, chemical fiber and wool fiber. The soft rock disintegrating soil modifier and the preparation method and the soft rock disintegrating soil improvement method of the present invention can significantly improve the mechanical properties of the soft rock disintegrating soil, reduce its permeability, and improve the reinforcement effect of the soft rock disintegrating soil and the water The alginate-glucose-cellulose gel can be rapidly degraded after being covered by soft rock disintegrating soil vegetation, and has little impact on the environment.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and relates to a soft rock disintegrating soil modifier, a preparation method thereof, and a soft rock disintegrating soil improvement method. Background technique [0002] Soft rock disintegrating soil includes small particles formed by the differentiation or disintegration of soft rock such as expansive soft rock, high stress soft rock, jointed soft rock and composite soft rock. Its physical and mechanical properties are similar to soil, but both Some characteristics of soft rock are strong disintegration and extremely sensitive to environmental factors such as temperature, humidity and stress. Under the action of loads and seasonal rainfall, the soft rock disintegrating soil will undergo repeated drying and wetting cycles, and will rapidly soften and disintegrate again, causing large deformation or even collapse of soft rock slopes, embankments, building bases and other projec...

AI Technical Summary

Problems solved by technology

The improvement principle of traditional cementitious materials is mainly through Si in lime or cement. 4+ 、Al 3+ and Fe 3+ The hydration reaction of the plasma forms a layer of gelled material on the surface of the mudstone to increase the strength and anti-seepage performance of the mudstone. Although the traditional cementitious materials are cheap and fast in consolidation, their anti-seepage effect and durability are poor. After the soil is alkaline and hardened, it is not easy to grow plants and damage the ecology

The improvement principle of alkali active materials (such as fly ash, slag, blast furnace slag, etc.) is mainly through the alkaline substances in the material and the Si in rock and soil. 4+ 、Al 3+ Plasma is exchanged to form a gelled substance and further develop into a small network structure, which improves the internal structure and anti-seepage performance of the rock and soil mass, but the ion exchange rate between the alkali active material and the rock and soil mass is slow, and the curing time Long, resulting in slow reaction rate, poor modification effect in the early stage, and unable to quickly enhance soil properties

[0004] In the prior art, although there is a method for modifying soft rock disintegrating soil with alginate, sodium alginate’s own film-forming property and water gel form are used to fill pores, connect soft rock disintegrating soil particles, and strengthen the soft rock disintegrating soil. Mechanical properties and anti-seepage properties, the modification effect has a certain improvement compared with traditional gelling materials, and it is green and environmentally friendly. However, because alginate itself dissolves in water to form hydrogels and swells when it absorbs water, it is easy to cause softness after modification. Cracking occurs in rock-disintegrated soil, which is not conducive to slope surface protection