Research progress in microorganism improving soil properties

Abstract:

Soil properties depend not only on solid particle, liquid and gas in soil, but also on bacteria and fungus in soil. The mechanism of microorganism improving soil properties is that microorganism can change microstructure of soil by microorganism adsorption, inducing inorganic matter precipitation, bio-surfactant attachment and gas tamponade. Macro-performances of microorganism improving soil properties are mainly permeability reduction and strength improvement. Besides some achievements of theoretical analysis and experimental research on microorganism improving soil properties have been made, microorganism has also been applied well in some projects of sealing diaphragm and cementing reinforcement.