Effect of geogrid on sinkhole formation induced ground collapse prevention

The present study describes the results of laboratory model tests to prevent the event of sinkhole formation into the ground by using geosynthetic reinforcement. A series of reduced scale model tests were carried out with emphasis on the effects of geosynthetics reinforcement parameters such as density (number), length and spacing between the geogrid layers to evaluate the behavior of ground over the sinkhole. The purpose of the study is to evaluate the appropriateness of the combination of geogrid reinforcement to reduce the failure on the sinkhole. Based on experimental results, critical values of geogrid parameters for maximum reinforcing effect are suggested. The results of present study indicate that the use of geosynthetic reinforcement in an effective way can significantly reduce not only the collapse of ground but also ground surface settlement and earth pressure over the sinkhole.