Process of Soft Soil Stabilization by Chemical Grouting Injection

Chemical Grouting Injection

The process of soil stabilization can be described as a standard technique that is used to enhance the engineering traits of soil so as to develop some important parameters such as density, shear strength, compressibility, and hydraulic conductivity of the soil.

Common Methodologies

The general methods of soil stabilization can be categorized into many different categories such as surcharge load, vibration, admixtures, and chemical grouting, enhancing the general strength of soil by structural fill, and many other techniques. Like this, there are many methods that can be employed for varying purposes by improving some facets of soil behavior, and developing the overall properties as well as strength of soil.

The major aspects of ground treatment process involve reducing the prospect for overall and differential clearing, developing the bearing capacity of the ground, decreasing the interval during which the clearance occurs, lessening the hydraulic conductivity nature of the soil, decreasing the possibility for liquefaction in hydraulic fills or saturated fine sand, and eliminating water from the ground.

Soil Stabilization is a Practical Solution

At present, soil stabilization has turned out to be one of the most practical solutions to handle the soft grounds to accomplish the desired engineering characteristics, and conditions in order that structures can be positioned securely without experiencing considerable settlements. The usage of admixture,for example oils, cement, lime, and bitumen is actually one among the oldest, and most well-known technique for enhancing the general traits of soil of all kinds.

When admixture is combined with soil, it normally produces a substance known as soil-cement. Globally, the original technique of stabilizing soft soils by following this approach is referred to as DMM (Deep Mixing Method). It is nothing but an in-situ soil handling technology in which the soft soil is combined with cementitious, or many other components. Jet Grouting has been accepted to be appropriate to be utilized as the injection technique for the Deep Mixing Method. It employs a fluid jet (i.e. water, grout, and/or air) to grind down, and combine the in-situ loose, or soft soils with the standard grout.

Chemical Soil Stabilization

Chemical soil stabilization is the most efficient technique to develop the engineering properties of soil by combining many stabilizers with soil. Normally, the stabilizers that are combined with the soft soils to increase their desirable characteristics include lime, cement, bituminous substance, and fly ash. The chemicals that are normally utilized in the process of chemical stabilization of soft soils include acrylamide, sodium silicate, aminoplasts, lignosulfonates, polyurethane epoxy resins, N-methylolacrylamide, phenoplasts, and so on.

The selection of a specific chemical for the process of chemical soil stabilization generally depends on several determining factors, including toxicity, main purpose, rheology, and desired strength of the soil among others. Normally, 2 major types of reaction stake place during the process of chemical stabilization of soil, which include cat-ion exchange effect, and durable cementation.

Common Chemical Agents

The most usual chemical agents that are used to achieve cementation include Portland cement, sodium silicate polyacrylamides, fly ash, lime, and bituminous emulsion. Most of the chemical grouts are normally based on the mixture of a reagent, and sodium silicate to produce gel. For stabilization of coarse granular soils using chemical treatment, a special process called Joosten process is employed, and in this procedure calcium chloride is used as the main reagent.

On the whole, chemical soil stabilization is actually a need at the moment in most of the regions in order to construct modern structures such as buildings, which necessitate a steady soil base to help them to stand strong, and erect for a long period of time.