Haivan Station Landslide

Haivan Station Landslide

LCI : VNM1612061616
Main Information
Landslide Name : Haivan Station Landslide
Latitude : 16:11:37 N
Longitude : 108:9:4 E
Location
City / District : Haivan
Province : Da Nang
Country : Vietnam
Reporter
Reporter 1 : Khang Dang
Reporter 2 : Quang Lam
Landslide Type
Material : Complex
Movement : Slide
Velocity (mm/sec) : Very Slow
Depth (m) : Deep
Slope (degree) : Moderate
Volume (m³) : Very Large
Date of Occurence
Date of Occurence : Jan 01, 1970
Other Information
Land Use Source area : Forest, Railways
Run-out/deposition area : Railways, Sea/lake
Other Activity : Currently active
Triggering Factor : Rainfall
Death(s) & Missing : -
Houses and other structural damage : threatening the Haivan Railway Station
Photo of landslide : Haivan landslide-photo.JPG
Google earth kmz file : Haivan Station Landslide.kmz
Plan of landslide : -
Cross section of landslide : Haivan landslide-section.JPG
Reference (paper/report) : http://dl.ndl.go.jp/info:ndljp/pid/9578082
Testing graph : Haivan landslide-Testing Graphs.pdf
Monitoring graph : Haivan landslide-Inclinometer measurement.JPG
Video of moving landslides including 3D simulation : https://www.youtube.com/watch?v=JFkY_XoZ450&spfreload=10
Description :

Hai Van station is located on the sea side-slope of Hai Van pass at the height of 127 m. Every day, there are over 30 trains pass through this station. However, this area is often affected by landslides, for example landslides in the years of 1999, 2005, and 2007. This landslide is the biggest landslide in Hai Van Mountain with the length of 1040 m, and depth of displaced mass of 100 -120 m. Three bore holes (BH1 with 30 m depth, BH2 with 60 m depth, BH3 with 80 m depth) and some monitoring equipment such as rain gauges, extensometers, inclinometers have been carried out in this area to survey geology, observe rainfall and displacement of the landslide mass. The daily variation of rainfall and slope displacement from 10 May 2013 to 17 January 2014 was observed. The accumulative displacement in this period is around 19 mm and the large displacement observed after the heavy rainfall period from 18 September 2013 to 16 November 2013. It indicates that Hai Van station landslide is an active landslide with slow movement and failure may occur in the future. In the computer simulation of the active landslide in Viet Nam, failure started from a middle point of the slope when the pore-water pressure ratio (ru) reached the value of 0.31. The total landslide volume and the vertical maximum depth of the landslide were calculated to be 24057.9 x 103 m3 and 111 m, respectively. Source: Dang K (2015) Development of a new high-stress dynamic-loading ring-shear apparatus and its application to large-scale landslides. Doctoral Thesis, Graduate School of Engineering, Kyoto University. 79 pages