Back to Search Start Over

Simple monitoring method for precaution of landslides watching tilting and water contents on slopes surface.

Authors :
Uchimura, Taro
Towhata, Ikuo
Lan Anh, Trinh
Fukuda, Jou
Bautista, Carlos
Wang, Lin
Seko, Ichiro
Uchida, Taro
Matsuoka, Akira
Ito, Yosuke
Onda, Yuichi
Iwagami, Sho
Kim, Min-Seok
Sakai, Naoki
Source :
Landslides; Sep2010, Vol. 7 Issue 3, p351-357, 7p
Publication Year :
2010

Abstract

A low-cost and simple monitoring method for early warning of landslides is proposed. To detect abnormal deformation of a slope, this method employs a tilt sensor in place of an extensometer on the slope surface. In order to examine the relevance of measuring rotation angle on a slope surface by tilt sensor, model tests were conducted, and rotation on the slope surface was observed together with slide displacement along the surface. The rotation data responded 30 min before failure in a model test, which could be useful as a signal for early warning. However, the behavior of rotation before failure varies from case to case, and thus, criteria to issue warning should be defined more carefully. For a model slope made of uniform loose sand, measurement of slide displacement along the slope surface is sensitive to failure at the toe, while the measurement of rotation on the slope surface is useful to detect the development of progressive failure upward along the slope. Wireless sensor units with microelectromechanical systems (MEMS) tilt sensor and volumetric water content sensor were also examined on a real slope in Kobe City, and a long-term monitoring was attempted. A simple but possible way to define the criteria of judgment to issue warning can be proposed based on combination of data obtained by the tilt sensors and volumetric water content sensors. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
1612510X
Volume :
7
Issue :
3
Database :
Complementary Index
Journal :
Landslides
Publication Type :
Academic Journal
Accession number :
52836721
Full Text :
https://doi.org/10.1007/s10346-009-0178-z