Proceedings of the Institution of Civil Engineers - Forensic Engineering
The water film effect is considered a key factor in triggering the large scale flowslides on gent... more The water film effect is considered a key factor in triggering the large scale flowslides on gently sloping terrain in highly stratified, liquefiable sandy soils during the 2018 Sulawesi Earthquake. The mechanism of water film formation under multiple less permeable soil layers (capping layers) with different plasticity characteristics is evaluated using 1D soil model tests under impact loading and their 1D response analysis. As observed, the water film can form under both plastic and non-plastic capping layers under the influence of impact load. The effect of number of capping layers, as well as their plasticity, on the water film formation and the dissipation of excess pore water pressure is evaluated, as well as the resulting vertical and lateral deformation of the soil layers, together with the stresses produced under a sinusoidal loading, inducing a water film effect is studied. From the results, it can be concluded that the configuration and the plasticity of the capping layer...
The Sulawesi earthquake with a moment magnitude of Mw 7.5 struck the Central Sulawesi region of t... more The Sulawesi earthquake with a moment magnitude of Mw 7.5 struck the Central Sulawesi region of the Sulawesi Island, Indonesia, on September 28, 2018. The epicenter of the earthquake was located in the mountainous region of Donggala Regency, in the neck of the Minahasa Peninsula in the Central Sulawesi Province of Indonesia. Although the epicenter was located in Donggala Regency, the greatest devastating effects were observed about 70 km south of the epicenter in the Palu Valley. The event was the first of its kind to cause large-scale flowslides simultaneously at four key locations such as Balaroa, Petobo, Jono Oge, and Sibalaya with extensive ground displacements ranging from several hundred meters to more than 1 km. This article reviews the field observations of geotechnical failures and infrastructure damage caused by liquefaction resulting from the shallow strike-slip earthquake at Palu City, Donggala Regency, and Sigi Regency. A geo-spatial analysis was performed on data colle...
Most of dams existing in India were constructed long back, with limited technical resources. Info... more Most of dams existing in India were constructed long back, with limited technical resources. Information relating to dam foundations and structural components is essential in the evaluation, stability assessment and retrofitting of existing dams. Geotechnical and Geophysical methods can provide direct and indirect information for safety analysis and augment studies for the conditional assessment of dams. This paper presents details for an integrated approach using geotechnical and geophysical methods useful for investigation and rehabilitation of dam and associated structures. Integrated approach of field observation, drilling of boreholes with sample collection, Multichannel Analysis of Surface Wave (MASW) survey, Ground Penetrating Radar (GPR) survey and Resistivity Imaging survey are explained with typical results. Drilling of borehole with Standard penetration test (SPT) N measurement with sampling, static and dynamic properties estimation of the dam and foundation using MASW, w...
This study aims to investigate the effect of low permeability capping layers on the PWP dissipati... more This study aims to investigate the effect of low permeability capping layers on the PWP dissipation and deformation of saturated sand deposits under dynamic loading conditions. To evaluate the buildup and dissipation of excess PWP in a simple way, one dimensional (1-D) model tests were conducted by imparting impact loading to a soil column with and without capping layer. The study aims to investigate the probable cause of large-scale flow failure at Juno Oge village in Palu, Indonesia due to 2018, Donggala earthquake.
The Sulawesi earthquake with a moment magnitude of Mw 7.5 struck the Central Sulawesi region of t... more The Sulawesi earthquake with a moment magnitude of Mw 7.5 struck the Central Sulawesi region of the Sulawesi Island, Indonesia, on September 28, 2018. The epicenter of the earthquake was located in the mountainous region of Donggala Regency, in the neck of the Minahasa Peninsula in the Central Sulawesi Province of Indonesia. Although the epicenter was located in Donggala Regency, the greatest devastating effects were observed about 70 km south of the epicenter in the Palu Valley. The event was the first of its kind to cause large-scale flowslides simultaneously at four key locations such as Balaroa, Petobo, Jono Oge, and Sibalaya with extensive ground displacements ranging from several hundred meters to more than 1 km. This article reviews the field observations of geotechnical failures and infrastructure damage caused by liquefaction resulting from the shallow strike-slip earthquake at Palu City, Donggala Regency, and Sigi Regency. A geo-spatial analysis was performed on data colle...
Procds. of the 16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, 2019
This study aims to investigate the effect of low permeability capping layers on the PWP dissipati... more This study aims to investigate the effect of low permeability capping layers on the PWP dissipation and deformation of saturated sand deposits under dynamic loading conditions. To evaluate the buildup and dissipation of excess PWP in a simple way, one dimensional (1-D) model tests were conducted by imparting impact loading to a soil column with and without capping layer. The study aims to investigate the probable cause of large-scale flow failure at Juno Oge village in Palu, Indonesia due to 2018, Donggala earthquake.
Proceedings of the Institution of Civil Engineers - Forensic Engineering
The water film effect is considered a key factor in triggering the large scale flowslides on gent... more The water film effect is considered a key factor in triggering the large scale flowslides on gently sloping terrain in highly stratified, liquefiable sandy soils during the 2018 Sulawesi Earthquake. The mechanism of water film formation under multiple less permeable soil layers (capping layers) with different plasticity characteristics is evaluated using 1D soil model tests under impact loading and their 1D response analysis. As observed, the water film can form under both plastic and non-plastic capping layers under the influence of impact load. The effect of number of capping layers, as well as their plasticity, on the water film formation and the dissipation of excess pore water pressure is evaluated, as well as the resulting vertical and lateral deformation of the soil layers, together with the stresses produced under a sinusoidal loading, inducing a water film effect is studied. From the results, it can be concluded that the configuration and the plasticity of the capping layer...
The Sulawesi earthquake with a moment magnitude of Mw 7.5 struck the Central Sulawesi region of t... more The Sulawesi earthquake with a moment magnitude of Mw 7.5 struck the Central Sulawesi region of the Sulawesi Island, Indonesia, on September 28, 2018. The epicenter of the earthquake was located in the mountainous region of Donggala Regency, in the neck of the Minahasa Peninsula in the Central Sulawesi Province of Indonesia. Although the epicenter was located in Donggala Regency, the greatest devastating effects were observed about 70 km south of the epicenter in the Palu Valley. The event was the first of its kind to cause large-scale flowslides simultaneously at four key locations such as Balaroa, Petobo, Jono Oge, and Sibalaya with extensive ground displacements ranging from several hundred meters to more than 1 km. This article reviews the field observations of geotechnical failures and infrastructure damage caused by liquefaction resulting from the shallow strike-slip earthquake at Palu City, Donggala Regency, and Sigi Regency. A geo-spatial analysis was performed on data colle...
Most of dams existing in India were constructed long back, with limited technical resources. Info... more Most of dams existing in India were constructed long back, with limited technical resources. Information relating to dam foundations and structural components is essential in the evaluation, stability assessment and retrofitting of existing dams. Geotechnical and Geophysical methods can provide direct and indirect information for safety analysis and augment studies for the conditional assessment of dams. This paper presents details for an integrated approach using geotechnical and geophysical methods useful for investigation and rehabilitation of dam and associated structures. Integrated approach of field observation, drilling of boreholes with sample collection, Multichannel Analysis of Surface Wave (MASW) survey, Ground Penetrating Radar (GPR) survey and Resistivity Imaging survey are explained with typical results. Drilling of borehole with Standard penetration test (SPT) N measurement with sampling, static and dynamic properties estimation of the dam and foundation using MASW, w...
This study aims to investigate the effect of low permeability capping layers on the PWP dissipati... more This study aims to investigate the effect of low permeability capping layers on the PWP dissipation and deformation of saturated sand deposits under dynamic loading conditions. To evaluate the buildup and dissipation of excess PWP in a simple way, one dimensional (1-D) model tests were conducted by imparting impact loading to a soil column with and without capping layer. The study aims to investigate the probable cause of large-scale flow failure at Juno Oge village in Palu, Indonesia due to 2018, Donggala earthquake.
The Sulawesi earthquake with a moment magnitude of Mw 7.5 struck the Central Sulawesi region of t... more The Sulawesi earthquake with a moment magnitude of Mw 7.5 struck the Central Sulawesi region of the Sulawesi Island, Indonesia, on September 28, 2018. The epicenter of the earthquake was located in the mountainous region of Donggala Regency, in the neck of the Minahasa Peninsula in the Central Sulawesi Province of Indonesia. Although the epicenter was located in Donggala Regency, the greatest devastating effects were observed about 70 km south of the epicenter in the Palu Valley. The event was the first of its kind to cause large-scale flowslides simultaneously at four key locations such as Balaroa, Petobo, Jono Oge, and Sibalaya with extensive ground displacements ranging from several hundred meters to more than 1 km. This article reviews the field observations of geotechnical failures and infrastructure damage caused by liquefaction resulting from the shallow strike-slip earthquake at Palu City, Donggala Regency, and Sigi Regency. A geo-spatial analysis was performed on data colle...
Procds. of the 16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, 2019
This study aims to investigate the effect of low permeability capping layers on the PWP dissipati... more This study aims to investigate the effect of low permeability capping layers on the PWP dissipation and deformation of saturated sand deposits under dynamic loading conditions. To evaluate the buildup and dissipation of excess PWP in a simple way, one dimensional (1-D) model tests were conducted by imparting impact loading to a soil column with and without capping layer. The study aims to investigate the probable cause of large-scale flow failure at Juno Oge village in Palu, Indonesia due to 2018, Donggala earthquake.
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