198 results about "Soil stabilization" patented technology

CO₂ sequestering soil stabilization compositions are provided. The soil stabilization compositions of the invention include a CO₂ sequestering component, e.g., a CO₂ sequestering carbonate composition. Additional aspects of the invention include methods of making and using the CO₂ sequestering soil stabilization composition. The invention also comprises the method of stabilizing soil and producing a soil stabilized structure utilizing such compositions.

A stabilizer suitable for heavy metal contaminated soil and an application method thereof belong to the technical field of contaminated soil remediation treatment. The invention is characterized in that: the soil stabilizer comprises the following components by mass: 5%-8% of heavy metal chelants, 10%-20% of gelled materials, 50%-65% of clay mineral, 10%-15% of alkaline excitants; the gelled material, clay mineral and alkaline excitant are mixed and grinded to obtain a Blaine specific surface area of 5000-8000 cm2/g; the mixture is sieved by a 200-mesh sieve, and the water content is less than 3%; the heavy metal chelant is prepared into a solution by water with a mass percent of the chelant being 20%-40%. The stabilizer and soil are uniformly mixed, and conserved for above 5 days. The main components of the stabilizer are mostly natural materials; after the stabilizer is used, heavy metal contaminants in soil can be rapidly and effectively stabilized, and the toxicity of the contaminants is reduced. The materials used are economical and easily available, and do not cause secondary contamination, and the stabilizer is a rapid and high-efficient stabilizer for heavy metal contaminated soil.

A system and method are provided for promoting vegetation growth on a steeply sloping surface. The system of the present invention includes anchors that are secured to the sloping surface, an inner mesh layer in contact with the slope, a geosynthetic layer placed over the inner mesh layer, and seeded compost material placed in the gap or space between the geosynthetic layer and the inner mesh layer. An outer mesh layer is placed over the geosynthetic layer to help stabilize the geosynthetic layer. The geosynthetic layer and outer mesh layer are also secured to the protruding anchors. Vegetation grows in the compost material and roots of the vegetation penetrate the inner mesh layer into the slope. An established root system stabilizes the slope. The seeded compost material provides an environment that greatly enhances the growth of vegetation on steeply sloping surface which otherwise do not have adequate soil to promote growth. The anchors provide additional structural stabilization for the slope and also provide a means to attach the layers of materials.

Dry flowable solid compositions useful for preparing precision excavation and soil-grouting fluids are disclosed. The compositions are formulated so that, when added to water to form an excavation fluid, they enable the fluid in contact with unstable or sandy soils in the selected areas of the excavation to react and form silicate-based derivatives with lesser solubility and movement, thereby improving soil stability at the excavation wall.

A heterogeneous mixture produced by blending aliphatic or cyclic organic compounds with carboxylic acids of chemical structure R-COOH and applied to soils in a manner to produce high levels of dust and erosion control, and soil stabilization. Alternatively, a heterogeneous mixture may be produced by blending aliphatic or cyclic organic compounds with polyolefins of chemical structure C_nH_2n or R—C_2nH_3n, and applied to soils in a manner to produce high levels of dust control and soil stabilization. The aliphatic and cyclic compounds act as plasticizers and carriers for the carboxylic acids or polyolefin compounds. When applied to soil the carrier provides a mechanism for the carboxylic acid or polyolefin to penetrate the soil and also acts as a dust suppressing weighting agent. The plasticized carboxylic acid and/or polyolefin provides a durable, reworkable binder that associates small particulates while stabilizing soil and aggregate.

The invention discloses a contaminated soil stabilizing treatment device for soil governing. The contaminated soil stabilizing treatment device comprises a stabilizing treatment box, a breaking treatment box, a vibrating device and a screening box. The contaminated soil stabilizing treatment device is characterized in that a feeding port is formed in the left side of the screening box; a conveyingbelt is arranged on the left side of the feeding port; a rotating shaft is transversely arranged in the stabilizing treatment box; stirring blades distributed in a crossed array manner are arranged on the upper side and the lower side of the rotating shaft; a screening plate is arranged between the stabilizing treatment box and the screening box; a fixing cover is arranged on the vibrating device; a second transmission motor is arranged in the fixing cover; a second runner is arranged on the second transmission motor; an extruding plate is arranged at the lower end of the second runner; a connecting rod is fixed to the lower end of the extruding plate; and the breaking treatment box is arranged on the outer wall of the right side of a body box. By means of the contaminated soil stabilizing treatment device for soil governing, the feeding speed and the feeding amount are conveniently controlled, the soil and chemical contact area is large, the mixing effect is good, and governing is facilitated.

The invention discloses a stabilization restoration method for soil compositely polluted by arsenic, antimony and other heavy metals. The method comprises the following steps that (1) bentonite and/or crop-residue-derived carbon are/is added into the heavy-metal-compositely-polluted soil and stirred evenly; (2) water is added into the soil, the moisture content of the soil is made to be 20%, and a stirring reaction is conducted for 0.5-2 h; (3) a certain amount of arsenic-antimony-polluted soil stabilizer is added and stirred evenly, water is added then, the moisture content of the soil is made to be 30%-50%, and even stirring is conducted; and (4) the soil where the stabilizer is added is cured for 3-30 d, and the purpose of soil restoration is achieved. A stabilizing material adopted by the method has the characteristics of being economical, effective, extensive in source, low in cost, high in stability, free of secondary pollution to soil, neutral, no change in polluted soil pH value and the like, the operation method is simple, high in practicability and wide in application range, and the method has the good stabilization restoration effect on the heavy-metal-compositely-polluted soil, especially on the soil compositely polluted by heavy metals of arsenic and antimony.

A method of soil stabilization includes mixing a geopolymer material with an alkaline activator and adding 5 to 30 percent by weight of the mixture to a soil.

The invention discloses a soil stabilization structure and method for railway yard shield tunneling construction. Grouting holes stretching into the bottom of a rail track obliquely are formed in the two sides of a platform, double liquid grout contained in a sleeve valve pipe in each grouting hole condenses to form a reinforcing rod and a grout connecting ball outside the reinforcing rod, the grouting holes in each side are quincuncial, the grouting holes in the two sides are arranged in parallel in a staggered mode, every two adjacent grout connecting balls on the same side are connected, the grout connecting balls on the two sides are connected to form an integrated stereo netty structure, and then a stereo netty reinforcing structure is formed for the soil under the rail track, the strength and self-stability of the soil are improved, and shield tunneling construction is facilitated.

The invention discloses high-permeability prime coating emulsified asphalt, which comprises the following components: asphalt and/or residual oil, diluent, emulsifier, water, stabilizer and cationic SBR rubber latex. The preparing process prepare the asphalt by adopting emulsification of two colloid mills which are connected in series, wherein all materials pass through a primary colloid mill; part of materials discharged by the primary colloid mill pass through a secondary colloid mill, and are mixed with materials which do not pass through the secondary colloid mill to prepare a final product. The prepared emulsified asphalt has good stability and high permeability, and can permeate a base layer with depth of between 5 and 10mm. The diluent is lubricant furfural refined extract oil, FCC slurry oil, fatty acid leftovers, decompression side line oil and other industrial byproducts, and has smaller volatility and lower price compared with gasoline, coal oil and diesel oil, so that the prepared high-permeability emulsified asphalt has low cost. Besides serving as priming oil, the emulsified asphalt can also be used in asphalt pavement cold regeneration, slurry seal and highway constructions of microsurfacing, dust diminisher, soil stabilization and lane and sidewalk sealant.

A method for applying a soil stabilizer, to soil wherein the soil stabilizer is intermixed, impregnated, and/or applied to solid carriers.

The invention provides a special vegetation concrete for slope protection and greening by using a high-polymer pellet technique, which is characterized in that the raw materials comprise cement, local soil, plant fibers, a high-water-absorptivity resin water retention agent, a pellet agent, northeast black soil, a concrete reinforcement wire, an organic fertilizer, plant seeds, a Chinese medicinal herb nutrient, an antalkali, a soil stabilizer and water. The northeast black soil, soil stabilizer and know clearly pellet agent are added into the formula of the vegetation concrete, increasing the fertility and stability of the concrete on the premise of ensuring the characteristics of the vegetation concrete, and being more beneficial to growth of the vegetation; the pellet agent is added to increase the formed pores of the concrete and provide plants with larger growth space; the concrete reinforcement wire is added to enhance the strength of the solidified concrete; and the Chinese medicinal herb nutrient is added to provide nutrients for seed growth and promote the growth of the seeds.

Provided is an engineering method for cleaning contaminated soil by which the problem of the cleaning method such as a washing method can be dissolved, content of contaminants in soil is suppressed below a standard and further elution quantity can be suppressed below a standard. The engineering method for cleaning the contaminated soil comprises a washing process in which contaminated soil with heavy metals is washed and is separated into washing muddy water and washing treated soil and a soil stabilizing process in which elution components of heavy metals from the washing treated soil are fixed. Preferably, the washing muddy water separated in the washing process is then separated into treated water and heavy metal-containing solid in a water treating process.

The invention relates to a composite bamboo rib combined bolting and shotcrete support for foundation pit supporting and a construction method of the composite bamboo rib combined bolting and shotcrete support, and belongs to the technical field of municipal construction. Firstly, deep mixed piles are used for soil stabilization construction, then, excavation is conducted in a layered mode, and a bamboo rib anchoring and shotcreting structure is arranged on a soil body with a certain gradient. The bamboo rib anchoring and shotcreting structure comprises a panel, and further comprises bamboo anchor rods, bamboo ribs, bamboo nails, short steel bars and the like. Holes are transversely drilled in the tail portions of the bamboo anchor rods, and the two phi 10 steel bars which are 20cm long are installed in the holes to form a whole with the panel. The composite bamboo rib combined bolting and shotcrete support for foundation pit supporting and the construction method of the composite bamboo rib combined bolting and shotcrete support have the advantages of being low in construction cost and environmentally friendly, and are suitable for being used in regions where soil layer conditions are poor.

The invention discloses a widely-applicable high-efficiency nondestructive method for repairing a heavy metal polluted farmland in situ. The method realizes in-situ nondestructive repair, stabilization and fertility increase of heavy metal polluted farmland soil through steps such as plowing, ridging, water irrigation for soaking, adsorption through movable adsorption modules, soaking water internal circulation, soil stabilization and fertility increase performed to the polluted farmland soil. The method does not need additional additives, does not destruct the soil structure and composition, can realize deep high-efficiency purification of heavy metals of various types and forms, has the advantages of wide application scope, small workload, short treatment period, low cost and the like, and is very applicable to the treatment of the heavy metal polluted farmland soil.

The invention relates to disposing of unwanted waste waters produced from purifying water. The methods of the present invention include applying waste water containing 0.15% by weight of the salts of Na, K, Ca, Mg, Fe, Cl, SO₄, and CO₃ and mixtures thereof to soil to control dust, effect soil stabilization, seal ponds, inhibit root rot, and irrigate soil. The invention also relates to the utilization of waste waters within cooling towers and for laundry applications.