Soil reinforcement is a recent and fast developing technique to improve soil behavior for a variety of civil engineering works; e.g. earth retaining structures, slope stability, landslides protection works, pavement, etc. In order to utilize fully the strength of reinforcement material while transferring load and forces via soil or aggregate to the reinforcement, a correct assessment of the soil/reinforcement frictional relationship is essential. 

Pull out Test Apparatus is being especially designed to measure the interface friction between GI Strips/Geo-synthetics and Soil. The use of reinforcements provides additional shear stress in the soil mass through the tensile force in the reinforcement. The considerable increase in the use of geo-synthetics in the reinforced soil structures led to the development of testing procedures to evaluate their interaction properties. Pullout apparatus is mainly used for finding the interfacial friction between GI Strips I Geo-synthetics with soil. 

The tests for permittivity and transmissivity help in comparing one fabric to another, but gives no indication of the hydraulic behavior of the composite soil-fabric system. Under steady state and reversing flow conditions, fabric clogging or binding causes a decrease in water flow rate and corresponding increase in hydraulic head loss through the geo-textile. When the potential for fabric clogging is significant, clogging resistance of filter fabrics should be evaluated to ensure adequate long term filter performance. As the clogging is highly soil dependent, soil fabric permeability test is suggested to determine the long term flow capability of a geo-textile.

 

The apparatus is designed to provide confining pressure upto 160 Bar to triaxial cells. The system consists of an oil pump, continuously driven by an electric motor during the entire period of operation to maintain the desired pressure. The unit provides continuous variable pressure upto 160 Bar, which can be increased or decreased, simply by turning a control knob. 

 

This equipment is used for determining unconfined compressive strength of intact rock core specimens. The rock sample is cut to length and the ends are machined flat. The specimen is placed in a loading frame and if required heated to the desired test temperature. Axial load is continuously increased on the specimen until peak load and failure are obtained.