Retaining System Against Rockfall Near a Highway in Vietnam—A Case Study
In this paper, a study was performed to investigate the rock fall event from km 18 + 980 to km 19 + 120 near the Halong-Vandon highway in Vietnam. The total area affected by rock fall was approximately 140 m long and 50 m high. This event took place as a result of the excavation during construction of the highway, which had removed part of the mountain and caused unbalance of the remaining slope. The stratigraphy was mainly composed of fairly-weathered rock. The topography of the location was investigated using Unmanned Aerial Vehicle (UAV) together with manual measurement. The protective measure, which had been applied successfully to the location, was also introduced. Particularly, the retaining system was composed of rock bolts, wire mesh, and an anchored wall. The rock bolts together with wire mesh were adopted to protect against rockfall at the top of the mountain whereas the anchored wall was constructed at the bottom of the mountain to stabilize this part.
Keywordsrock fall hazard protective measures slope stability
Unable to display preview. Download preview PDF.
- Chau, T. L. and Phung, K. H. (2015). Design of a retaining system of slope formed by excavation along Hoang Van Thai road using anchors. J. Sci. Tech. Danang, vol. 96, no. 11.Google Scholar
- Nguyen, D. L. and Doan, T. T. (2011). Classification of soil movement under selfweight on a slope in the mountainous area. J. Sci. Tech. Construction, vol. 1.Google Scholar
- PLAXIS 2D 2010 Manual.Google Scholar
- TCVN 9861-2013. Retaining system against sliding nearby highway-Investigation and design requirements.Google Scholar
- Vrkljan, I. (2009). Rock engineering in difficult ground conditions - soft rocks and karst. Chapman and Hall/CRC.Google Scholar