TY - GEN
T1 - Determination of Crucial Shear Parameters in Highly Landslide Prone Tropical Soils in Bello Oriente, Medellín, Colombia
AU - Breuninger, Tamara
AU - Menschik, Bettina
AU - Gamperl, Moritz
AU - Thuro, Kurosch
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.
PY - 2024
Y1 - 2024
N2 - The project Inform@Risk is developing a low-cost landslide early warning system in the barrio Bello Oriente in Medellín, Colombia. Especially the block-in-matrix structure of the deeply fractured dunite rock, created by weathering and former landslide events, in the area is prone to landslides. Therefore, the geological investigation of the subsurface material focuses on the shear parameters of the matrix since the blocks do not contribute to dynamic and behaviour of the landslides considerably. During the test installation of the Early Warning Systemin the barrio in September/October 2021 some samples for direct shear tests have been collected in the trenches for the TDR lines and tested in the laboratory of Integral S.A.S in Medellín. The friction angle shows minor differences between the samples, the cohesion, however, provides evidence of major variation. The difference is created by a combination of varying grain size distribution, water content and density. Since the determined friction angle of the material and the slope angle of the study site are congruent, the slope is suggested to be in an instable equilibrium and might fail after heavy rainfall or other additional water input. The early warning system is, therefore, of high importance to the well-being of the inhabitants.
AB - The project Inform@Risk is developing a low-cost landslide early warning system in the barrio Bello Oriente in Medellín, Colombia. Especially the block-in-matrix structure of the deeply fractured dunite rock, created by weathering and former landslide events, in the area is prone to landslides. Therefore, the geological investigation of the subsurface material focuses on the shear parameters of the matrix since the blocks do not contribute to dynamic and behaviour of the landslides considerably. During the test installation of the Early Warning Systemin the barrio in September/October 2021 some samples for direct shear tests have been collected in the trenches for the TDR lines and tested in the laboratory of Integral S.A.S in Medellín. The friction angle shows minor differences between the samples, the cohesion, however, provides evidence of major variation. The difference is created by a combination of varying grain size distribution, water content and density. Since the determined friction angle of the material and the slope angle of the study site are congruent, the slope is suggested to be in an instable equilibrium and might fail after heavy rainfall or other additional water input. The early warning system is, therefore, of high importance to the well-being of the inhabitants.
KW - Block-in-matrix-structure
KW - Dunite rock
KW - Landslides in tropical regions
KW - Medellín
KW - Shear parameters
UR - http://www.scopus.com/inward/record.url?scp=85203581992&partnerID=8YFLogxK
U2 - 10.1007/978-981-99-9061-0_42
DO - 10.1007/978-981-99-9061-0_42
M3 - Conference contribution
AN - SCOPUS:85203581992
SN - 9789819990603
T3 - Environmental Science and Engineering
SP - 583
EP - 591
BT - Engineering Geology for a Habitable Earth
A2 - Wang, Sijing
A2 - Huang, Runqiu
A2 - Azzam, Rafig
A2 - Marinos, Vassilis P.
PB - Springer Science and Business Media Deutschland GmbH
T2 - 14th International Association for Engineering Geology and the Environment, IAEG 2023
Y2 - 21 September 2023 through 27 September 2023
ER -