Case Study on a Dip Slope Influenced by Riverbank Erosion and Highway Construction

Ya Chu Chiu ； Bai Chiao Lo ； Wei Lo ； Tien Chien Chen ； Tai Tien Wang

《Geotechnical Hazard Mitigations: Experiment, Theory and Practice—Proceedings of the 5th International Conference on Geotechnical Engineering for Disaster Mitigation and Rehabilitation》 2017年 (2017/10) Pp. 255-262

https://doi.org/10.6140/9789864371419.201710.0021

摘要

A highway slope along Ailiao Creek is stroke by Typhoon Morakot in 2009. Based on multi-temporal aerial photos, digital elevation model and field investigations, several dip slope failure were confirmed in the past 70 years. The sliding masses of dip slope were formed by bedding surface and two joints. Before sliding occurr, gullies along joint direction developed. Under long-term gravitational effect, dip slope failure then triggered by daylight produced after bank erotion or highway construction. Investigation shows that dip slope failure presents various features such as deformation, buckling and sliding of rock mass according to their relative height on the slope. In response to their deformation or failure feature, the two highway passing through case slope were repaired with different engineering measures, which were proved effective after 8 years.

關鍵字

Dip slope ； Riverbank erosion ； Highway maintenance ； Daylight ； Slope deformation