Ria Soemitro | Institut Teknologi Sepuluh Nopember (original) (raw)

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Papers by Ria Soemitro

Research paper thumbnail of Soil improvement by surcharge and vacuum preloadings

Géotechnique, 2000

ABSTRACT

Research paper thumbnail of Behaviour of compacted silt used to construct flood embankment

Proceedings of the ICE - Geotechnical Engineering, 2011

This paper investigates the unsaturated mechanical behaviour of a fill material sampled from floo... more This paper investigates the unsaturated mechanical behaviour of a fill material sampled from flood embankments located along the Bengawan Solo River in Indonesia. In order to gain a better understanding of this fill material, in situ tests were carried out alongside an extensive laboratory programme. Two different phenomena related to changes in moisture content of the embankment fill material are experimentally studied herein: (a) volumetric collapse and (b) variation in shear strength with suction. At low densities, similar to those found in situ, the material exhibited significant volumetric collapse behaviour. Triaxial tests carried out under saturated, suction-controlled and constant water content conditions indicate that the shear strength of the material increased with suction; in particular the effective angle of friction increased from 24 . 98 under saturated conditions to 35 . 88 under air-dried conditions.

Research paper thumbnail of Studi Eksperimental Erodibilitas Tanah

Penentuan umur layanan bangunan air memerlukan keakuratan dalam memprediksi erosi dan sedimen. Ke... more Penentuan umur layanan bangunan air memerlukan keakuratan dalam memprediksi erosi dan sedimen. Ketidaktepatan dalam memprediksi erosi salah satunya diakibatkan oleh kesalahan dalam menentukan faktor erodibilitas tanah. Banyak model erosi dan sedimen yang telah dikembangkan masih didasarkan pada faktor erodibilitas (K) berdasarkan Nomogram , namun metode ini belum memperhatikan perubahan sifat fisik tanah. Iklim tropis di Indonesia memungkinkan terjadi proses pembasahan dan pengeringan tanah secara berulang sehingga mampu mengubah sifat fisik tanah dan diduga berpengaruh terhadap erodibilitas. Erodibilitas masih dianggap sebagai variabel yang tidak berubah sepanjang tahun, padahal sifat fisik tanah di daerah tropis cenderung berubah seiring dengan perubahan musim. Perubahan erodibilitas ini akan mempengaruhi potensi erosi dan sedimen daerah pada suatu daerah aliran sungai.

Research paper thumbnail of ACCIDENT ANALYSIS ASSESSMENT TO THE ACCIDENT INFLUENCE FACTORS ON TRAFFIC SAFETY IMPROVEMENT

Proceedings of the …, Jan 1, 2005

Research paper thumbnail of Contribution à L'étude Du Rôle De La Pression Interstitielle Négative Dans Le Gonflement Et D'Autres Aspects Du Comportement Des Sols Non Saturés= The Influence of  …

Research paper thumbnail of EVALUASI FASILITAS RUMAH SUSUN DI SURABAYA

TORSI Jurnal Teknologi dan …, Jan 1, 2009

Research paper thumbnail of PENENTUAN URUTAN PRIORITAS USULAN KEGIATAN PENINGKATAN JALAN KOTA (Studi Kasus Dinas Pekerjaan Umum Kota Pangkalpinang)

TORSI Jurnal Teknologi …, Jan 1, 2009

Research paper thumbnail of Soil improvement by surcharge and vacuum preloadings

Géotechnique, 2000

ABSTRACT

Research paper thumbnail of Behaviour of compacted silt used to construct flood embankment

Proceedings of the ICE - Geotechnical Engineering, 2011

This paper investigates the unsaturated mechanical behaviour of a fill material sampled from floo... more This paper investigates the unsaturated mechanical behaviour of a fill material sampled from flood embankments located along the Bengawan Solo River in Indonesia. In order to gain a better understanding of this fill material, in situ tests were carried out alongside an extensive laboratory programme. Two different phenomena related to changes in moisture content of the embankment fill material are experimentally studied herein: (a) volumetric collapse and (b) variation in shear strength with suction. At low densities, similar to those found in situ, the material exhibited significant volumetric collapse behaviour. Triaxial tests carried out under saturated, suction-controlled and constant water content conditions indicate that the shear strength of the material increased with suction; in particular the effective angle of friction increased from 24 . 98 under saturated conditions to 35 . 88 under air-dried conditions.

Research paper thumbnail of Studi Eksperimental Erodibilitas Tanah

Penentuan umur layanan bangunan air memerlukan keakuratan dalam memprediksi erosi dan sedimen. Ke... more Penentuan umur layanan bangunan air memerlukan keakuratan dalam memprediksi erosi dan sedimen. Ketidaktepatan dalam memprediksi erosi salah satunya diakibatkan oleh kesalahan dalam menentukan faktor erodibilitas tanah. Banyak model erosi dan sedimen yang telah dikembangkan masih didasarkan pada faktor erodibilitas (K) berdasarkan Nomogram , namun metode ini belum memperhatikan perubahan sifat fisik tanah. Iklim tropis di Indonesia memungkinkan terjadi proses pembasahan dan pengeringan tanah secara berulang sehingga mampu mengubah sifat fisik tanah dan diduga berpengaruh terhadap erodibilitas. Erodibilitas masih dianggap sebagai variabel yang tidak berubah sepanjang tahun, padahal sifat fisik tanah di daerah tropis cenderung berubah seiring dengan perubahan musim. Perubahan erodibilitas ini akan mempengaruhi potensi erosi dan sedimen daerah pada suatu daerah aliran sungai.

Research paper thumbnail of ACCIDENT ANALYSIS ASSESSMENT TO THE ACCIDENT INFLUENCE FACTORS ON TRAFFIC SAFETY IMPROVEMENT

Proceedings of the …, Jan 1, 2005

Research paper thumbnail of Contribution à L'étude Du Rôle De La Pression Interstitielle Négative Dans Le Gonflement Et D'Autres Aspects Du Comportement Des Sols Non Saturés= The Influence of  …

Research paper thumbnail of EVALUASI FASILITAS RUMAH SUSUN DI SURABAYA

TORSI Jurnal Teknologi dan …, Jan 1, 2009

Research paper thumbnail of PENENTUAN URUTAN PRIORITAS USULAN KEGIATAN PENINGKATAN JALAN KOTA (Studi Kasus Dinas Pekerjaan Umum Kota Pangkalpinang)

TORSI Jurnal Teknologi …, Jan 1, 2009

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