Insights from CPTu and Seismic Cone Penetration Testing in the Kathmandu Valley, Nepal

Charlotte E L Gilder; Rama Mohan Pokhrel; Flavia De Luca; Paul J Vardanega

doi:10.3389/fbuil.2021.646009

Insights from CPTu and Seismic Cone Penetration Testing in the Kathmandu Valley, Nepal

Charlotte E L Gilder, Rama Mohan Pokhrel, Flavia De Luca, Paul J Vardanega^*

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

3 Citations (Scopus)

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Abstract

Seismic hazard assessment often relies on static piezocone penetration tests (CPTu) to estimate the cyclic resistance ratio (CRR) and for the evaluation of in situ soil behavior. This article presents CPTu data acquired in the Kathmandu valley sediments and makes use of established CPTu interpretation procedures to assess the soil in situ properties. Up to this point predominantly SPT data and limited shear wave velocity measurements have been relied upon to assess the variability and seismic response of soil deposits underlying Kathmandu. This article provides 1) additional data to add to the existing SAFER/GEO-591 database, 2) new shear-wave velocity measurements, and 3) initial estimates of CRR at the sites visited. Based on the work presented in this article, it is concluded that a more detailed methodology is needed for liquefaction assessment mainly due to the presence of saturated silts in the valley.

Original language	English
Article number	646009
Number of pages	18
Journal	Frontiers in Built Environment
Volume	7
DOIs	https://doi.org/10.3389/fbuil.2021.646009
Publication status	Published - 7 May 2021

Bibliographical note

Funding Information:
Many thanks are given to IN SITU Site Investigation for the significant in-kind contribution and particularly to Darren Ward and Sam Pyott for which the CPT work would not be possible. Additionally, the authors would like to thank NSET-Nepal, with particular thanks to Surya Shrestha and Narayan Marasini for their invaluable collaboration and support.

Funding Information:
The first author acknowledges the support of the Engineering and Physical Science Research Council (EPSRC) (EP/R51245X/1). The authors acknowledge the support of the EPSRC project “Seismic Safety and Resilience of Schools in Nepal” SAFER (EP/P028926/1) and Professor Anastasios Sextos for his support and leadership of the SAFER project. The authors also acknowledge the support of the University of Bristol Faculty of Engineering: Research Pump Priming funding.

Publisher Copyright:
© Copyright © 2021 Gilder, Pokhrel, De Luca and Vardanega.

Keywords

CPTu
shear-wave velocity
Kathmandu valley
ground investigation
geotechnical testing

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10.3389/fbuil.2021.646009

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3 Citations
1 Conference Contribution (Conference Proceeding)

Further analysis of CPTu and seismic cone data collected in the Kathmandu valley, Nepal
Gilder, C., Pokhrel, R., De Luca, F. & Vardanega, P. J., 7 Jun 2023, European Geotechnical Engineering - Unity and Diversity: Proceedings of the 17th Danube–European Conference on Geotechnical Engineering, 7-9 June 2023, Bucharest, Romania. Lungu, I., Teodoru, I.-B. & Batali, L. (eds.). Işai, România: Politehnium Publishing House, Vol. 1. p. 43-50 8 p.
Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

Open Access
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1 Finished

SAFER Seismic safety and resilience of schools in Nepal
Sextos, A. (Principal Investigator), De Luca, F. (Co-Investigator), Vardanega, P. J. (Co-Investigator), Agarwal, J. (Co-Investigator), Alexander, N. A. (Co-Investigator) & Werner, M. (Co-Investigator)
1/05/17 → 30/06/21
Project: Research, Parent

Supporting data for "Insights from CPTu and seismic cone testing in the Kathmandu Valley, Nepal"
Gilder, C. (Creator), Luca, F. D. (Creator) & Vardanega, P. (Creator), University of Bristol, 15 Feb 2021
DOI: 10.5523/bris.1271fsyng8y2z2cjyvlss1i8d2, http://data.bris.ac.uk/data/dataset/1271fsyng8y2z2cjyvlss1i8d2
Dataset

Cite this

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title = "Insights from CPTu and Seismic Cone Penetration Testing in the Kathmandu Valley, Nepal",

abstract = "Seismic hazard assessment often relies on static piezocone penetration tests (CPTu) to estimate the cyclic resistance ratio (CRR) and for the evaluation of in situ soil behavior. This article presents CPTu data acquired in the Kathmandu valley sediments and makes use of established CPTu interpretation procedures to assess the soil in situ properties. Up to this point predominantly SPT data and limited shear wave velocity measurements have been relied upon to assess the variability and seismic response of soil deposits underlying Kathmandu. This article provides 1) additional data to add to the existing SAFER/GEO-591 database, 2) new shear-wave velocity measurements, and 3) initial estimates of CRR at the sites visited. Based on the work presented in this article, it is concluded that a more detailed methodology is needed for liquefaction assessment mainly due to the presence of saturated silts in the valley.",

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note = "Funding Information: Many thanks are given to IN SITU Site Investigation for the significant in-kind contribution and particularly to Darren Ward and Sam Pyott for which the CPT work would not be possible. Additionally, the authors would like to thank NSET-Nepal, with particular thanks to Surya Shrestha and Narayan Marasini for their invaluable collaboration and support. Funding Information: The first author acknowledges the support of the Engineering and Physical Science Research Council (EPSRC) (EP/R51245X/1). The authors acknowledge the support of the EPSRC project “Seismic Safety and Resilience of Schools in Nepal” SAFER (EP/P028926/1) and Professor Anastasios Sextos for his support and leadership of the SAFER project. The authors also acknowledge the support of the University of Bristol Faculty of Engineering: Research Pump Priming funding. Publisher Copyright: {\textcopyright} Copyright {\textcopyright} 2021 Gilder, Pokhrel, De Luca and Vardanega.",

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AU - Mohan Pokhrel, Rama

AU - De Luca, Flavia

AU - Vardanega, Paul J

N1 - Funding Information: Many thanks are given to IN SITU Site Investigation for the significant in-kind contribution and particularly to Darren Ward and Sam Pyott for which the CPT work would not be possible. Additionally, the authors would like to thank NSET-Nepal, with particular thanks to Surya Shrestha and Narayan Marasini for their invaluable collaboration and support. Funding Information: The first author acknowledges the support of the Engineering and Physical Science Research Council (EPSRC) (EP/R51245X/1). The authors acknowledge the support of the EPSRC project “Seismic Safety and Resilience of Schools in Nepal” SAFER (EP/P028926/1) and Professor Anastasios Sextos for his support and leadership of the SAFER project. The authors also acknowledge the support of the University of Bristol Faculty of Engineering: Research Pump Priming funding. Publisher Copyright: © Copyright © 2021 Gilder, Pokhrel, De Luca and Vardanega.

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N2 - Seismic hazard assessment often relies on static piezocone penetration tests (CPTu) to estimate the cyclic resistance ratio (CRR) and for the evaluation of in situ soil behavior. This article presents CPTu data acquired in the Kathmandu valley sediments and makes use of established CPTu interpretation procedures to assess the soil in situ properties. Up to this point predominantly SPT data and limited shear wave velocity measurements have been relied upon to assess the variability and seismic response of soil deposits underlying Kathmandu. This article provides 1) additional data to add to the existing SAFER/GEO-591 database, 2) new shear-wave velocity measurements, and 3) initial estimates of CRR at the sites visited. Based on the work presented in this article, it is concluded that a more detailed methodology is needed for liquefaction assessment mainly due to the presence of saturated silts in the valley.

AB - Seismic hazard assessment often relies on static piezocone penetration tests (CPTu) to estimate the cyclic resistance ratio (CRR) and for the evaluation of in situ soil behavior. This article presents CPTu data acquired in the Kathmandu valley sediments and makes use of established CPTu interpretation procedures to assess the soil in situ properties. Up to this point predominantly SPT data and limited shear wave velocity measurements have been relied upon to assess the variability and seismic response of soil deposits underlying Kathmandu. This article provides 1) additional data to add to the existing SAFER/GEO-591 database, 2) new shear-wave velocity measurements, and 3) initial estimates of CRR at the sites visited. Based on the work presented in this article, it is concluded that a more detailed methodology is needed for liquefaction assessment mainly due to the presence of saturated silts in the valley.

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KW - shear-wave velocity

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KW - ground investigation

KW - geotechnical testing

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JO - Frontiers in Built Environment

JF - Frontiers in Built Environment

M1 - 646009

ER -

Insights from CPTu and Seismic Cone Penetration Testing in the Kathmandu Valley, Nepal

Abstract

Bibliographical note

Keywords

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Research output

Further analysis of CPTu and seismic cone data collected in the Kathmandu valley, Nepal

Projects

SAFER Seismic safety and resilience of schools in Nepal

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Supporting data for "Insights from CPTu and seismic cone testing in the Kathmandu Valley, Nepal"

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