Effectiveness of geocell wall, geogrid and micropile anchors for mitigation of unstable slopes

• Published in: Geoenvironmental disasters Vol. 8; no. 1; pp. 1 - 15
• Main Authors: Kumar, Jain Sanjaya, Nusari, Mohammed Saleh, Purushotam, Dangol, Prasad, Acharya Indra, Rajyaswori, Shrestha
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 02-05-2021; Springer Nature B.V; SpringerOpen
• Subjects: Earth and Environmental Science; Earth Sciences; Environment; Environmental Science and Engineering; Failure analysis; Geocell; Geoecology/Natural Processes; Geography; Geogrid; Geogrids; Geosynthetics; Granular material; Granular materials; Gravity; Gravity walls; Landslides & mudslides; Micro pile; Micro piles; Mitigation; Natural Hazards; Numerical analysis; Reinforcement; Slope stability; Slope stabilization; Stability analysis; Reinforcement; Slope stability; Micro pile; Granular material; Geocell; Geogrid
• ISSN: 2197-8670; 2197-8670
• DOI: 10.1186/s40677-021-00185-z

Slope failure mitigation practices are well developed in recent years. Recently, geosynthetic, geocell, and geogrid combined with micropiles are being used extensively in various slope stabilization works. But integrated approaches are still lacking. In this study, a method of slope stabilization is proposed by integrated use of micropile, geocell and geogrid from an engineering and economical point of view. The study was done on slope failure located at Chandragiri Hill, south west of Kathmandu, Nepal. Geotechnical problems of the site, the design of geocell foundation, micropile and geogrid are done on the based on numerical analysis using Phase-2 software with field data. The results of analytical studies revealed that, the use of a combination of geocell, micropile and geogrid is beneficial in increasing slope stability. As per numerical analysis, in the slope failure site, geocell gravity walls each of 3.8 m, is constructed in different step. Beneath the geocell wall, different layers of geogrid were placed filled with granular materials. The geocell wall is connected with micropile from inside. The micropile works as an anchorage and support for geocell wall, which increases the stability of a failed slope.