https://scholars.lib.ntu.edu.tw/handle/123456789/547246
標題: | Influence of engineering geological characteristics on highway maintenance: Example of dasha river section of central cross-island highway | 作者: | Tsao, M.-C. Chen, W.-L. Jeng, F.-S. Wang, T.-T. FU-SHU JENG TAI-TIEN WANG |
關鍵字: | Landslide; Maintenance; Mountain Road; Reroute; River Erosion | 公開日期: | 2019 | 起(迄)頁: | 879-884 | 來源出版物: | 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019 | 摘要: | Mountain highways have low traffic volume. However, their maintenances that require huge resources and cost are typically necessary due to the needs of social development, land conservation and natural disaster prevention and response. Recognizing the vulnerable sections of a mountainous highway and associate factors that influence their usual operation is conducive in the development of appropriate maintenances strategies and related methods. Taking the Dasha River section of the Central Cross-island Highway (Tai-8 line) as an example, this study collects historical remote sensing images for more than 60 years, processing images and interpreting highway routes, landslides and gullies at different times to identify the sections that have been rerouted or have highway structural type modifications, in order to investigate the environmental and engineering geological factors that affect the highway maintenance. Results of images interpretation reveal that, in the 9.4 km long mountainous highway studied and since the completion of the highway in 1960, four local sections have been rerouted toward hillside, even went through by tunnels, and one section has structural type modification to mitigate the influence of landslides and/or lateral erosion of the river. The locations of landslides and gullies development that are related to roads rerouted and structural type modification are all neighboring to some sharp turns of the Dasha River and adjacent to boundaries of geological strata. The differential erosion rate caused by different lithological properties and significant changes in engineering characteristics of rock masses in the vicinity of strata boundaries account for the relatively intense lateral erosion along the river and rapid development of gullies under the impact of runoff, which are also important geological factors related with the reroutes and structural modification of highway, in association with the long-term influences of rainfalls and earthquakes. © 2019 Japanese Society for Rock Mechanics, |
URI: | https://www.scopus.com/inward/record.url?eid=2-s2.0-85088468819&partnerID=40&md5=32cada11b53955ac2056665fe6dddfe7 https://scholars.lib.ntu.edu.tw/handle/123456789/547246 |
ISSN: | Tsao, M.-C.;Chen, W.-L.;Jeng, F.-S.;Wang, T.-T. | SDG/關鍵字: | Conservation; Disaster prevention; Disasters; Engineering geology; Erosion; Landforms; Landslides; Lithology; Maintenance; Remote sensing; Rivers; Rock mechanics; Rocks; Engineering characteristics; Engineering geological characteristics; Highway maintenance; Images interpretation; Mountainous highway; Remote sensing images; Social development; Structural modifications; Earthquake engineering |
顯示於: | 土木工程學系 |
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