Application of polymer grouting reinforcement technology in the treatment of slope collapse

Abstract

Abstract. Taking into considering of the difficulties and urgency in the treatment of geological hazards such as slope collapse, in light of the deficiencies in previous treatment methods, and also in view that the high polymer material, which has been widely used in geotechnical engineering, possesses the merits of high strength, light weight, high expansibility, short setting time, good durability, easy construction and is water-proof and harmless to the existing structures, the polymer grouting for the treatment of slope collapse is put forward innovatively. It is found that the polymer grouting can handle all kinds of unfavorable conditions in the treatment of slope collapse well. The slope deformation and stability before and after reinforcement with polymer grouting were studied by finite element method. The results indicates that the polymer grouting can deepen the slip circle and increase the sliding path, as a result, it avoids the shallow sliding mode of slope, which leads to the increase of stability and the decrease of slope deformation. After reinforcement, the factor of safety is increased by 35% and the maximum total displacement is reduced by 34.5%. Hence, the effectiveness of polymer grouting reinforcement technology is preliminarily verified.

Fracture Characteristics of Polyurethane Grouting Materials Based on Acoustic Emission Monitoring

“…Previously, cement grouting materials were generally used for underground filling and reinforcement in coal mines. Although the reinforcement effect has been achieved, there are still weaknesses compared with chemical grout [4]. For example, the permeability is weak, the bonding performance is poor, and it is difficult to accurately adjust or control the set time, etc.…”

“…In the past studies, researchers paid more attention to the properties of PU grouting materials, including gel time, temperature, viscosity, foaming ratio, uniaxial compressive strength, permeability coefficient and grouting technology, etc. [25][26][27][28][29], and evaluate the quality of materials through a series of performance indexes [30]. For the measurement of viscosity, most people use viscometer, and the measured value is fixed, which has certain limitations.…”