Manika Maharjan
Manika Maharjan, Ph.D.
Associate
Civil Engineering
Oakland

Dr. Maharjan specializes in geotechnical engineering and earthquake engineering. Her expertise includes performance assessment of ordinary and critical structures under extreme loading such as earthquakes, wind etc. Dr. Maharjan has substantial experience with the nuclear power generating industry. Her work has focused on the interpretation of subsurface conditions, ground motion generation/selection/scaling, signal processing and seismic data interpretation, and in evaluating seismic performance through soil-structure interaction. Dr. Maharjan has provided consultation on design and performance of retaining walls, embankments and levees. Her technical expertise also includes slope stability, evaluation of earth retaining structures, dams, foundations, and excavations. She has extensive experience in seismic hazard assessment, liquefaction assessment, and design of liquefaction mitigation measures.

Dr. Maharjan is experienced in the analysis, design and evaluation of new and existing structures, seismic and static soil-structure interaction, settlement analysis, ground investigations, site response analysis, centrifuge modeling, and laboratory testing of soils. She has in-depth research experience in analyzing and evaluating the deformation of embankments resting on liquefiable non-homogeneous foundations under sequential ground motions. Dr. Maharjan was involved in the ground investigation and seismic data interpretation of the Wylfa Newydd Nuclear Power Plant (to be constructed in Wales). She evaluated seismic risk and performed seismic soil-structure interaction analyses of the Hinkley Point C Nuclear Power Plant (to be constructed in Somerset, England). She has worked on the design of deep excavations, raft foundations, retaining walls and manmade slopes for nuclear power plant buildings. Dr. Maharjan has conducted seismic hazard assessments for an oil extraction site in Kenya. She has performed extensive research on the experimental behavior and numerical simulation of liquefaction mechanisms in non-homogeneous soil deposits. She has expertise in testing dynamic soil properties, analysis of the dynamic behavior of slopes, embankments and levees during earthquakes and evaluation of soil improvement measures. Dr. Maharjan was involved in the investigation and assessment of geotechnical damage and impacts caused by the 2011 Tohoku Earthquake, the 2011 Nepal-Sikkim Earthquake, and the 2015 Gorkha Earthquake. She has performed extensive geotechnical earthquake engineering work in Nepal, Japan, the United Kingdom, and Kenya.

Prior to joining Exponent, Dr. Maharjan worked in geotechnical engineering design in the United Kingdom. Dr. Maharjan’s doctoral research focused on the liquefaction-induced deformation of embankments on non-homogeneous liquefiable foundations. At the Tokyo Institute of Technology, she served as a graduate student researcher and was the teaching assistant for undergraduate courses in soil mechanics and geotechnical engineering. Dr. Maharjan served as a visiting research scholar at the University of California, Davis.

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Geotechnical Engineering, 2015
  • M.Eng., Geotechnical Engineering, 2012
  • B.Eng., Civil Engineering, 2010

LICENSES & CERTIFICATIONS

Licensed Professional Civil Engineer, Nepal

LANGUAGES

  • Nepali
  • Hindi
  • Japanese

Publications

Maharjan M. Liquefaction in Kathmandu Valley during 2015 Nepal Earthquake. 16th World Conference on Earthquake Engineering, Chile, January 9-13, 2017.

Pant DR and Maharjan M. On selection and scaling of ground motions for analysis of seismically isolated structures. Earthquake Engineering and Engineering Vibration; 15 (4): 633-648, 2016.

Maharjan M and Takahashi A. Liquefaction-induced deformation of embankments on non-homogeneous foundation under sequential ground motions. Soil Dynamics and Earthquake Engineering; 66: 113-124, 2014.

Maharjan M and Takahashi A. Effects of Non-homogeneity on Liquefaction-induced Deformation of Embankments. 9th annual AOTULE – University of Melbourne, Australia, November 27-28, 2014.

Maharjan M and Takahashi A. Numerical analysis on effects of non-homogeneity in the liquefaction-induced deformation of embankments. International Symposium Geohazards: Science, Engineering and Management, Kathmandu, Nepal, November 20-21, 2014.

Maharjan M and Takahashi A. Effects of Non-homogeneity on Liquefaction-induced Deformation of Embankments. Sixth Multidisciplinary International Student Workshop (MISW2014), Tokyo, Japan, 2014.

Ziotopoulou K, Maharjan M, Boulanger RW, Beaty MH, Armstrong RJ, and Takahashi A. Constitutive modeling of liquefaction effects in sloping ground. Tenth U.S. National Conference on Earthquake Engineering, Anchorage, Alaska, July 21-25, 2014.

Maharjan M and Takahashi A. Numerical analysis of earthen embankments on liquefiable non-homogeneous soil deposits. 49th Geotechnical Engineering workshop, Kita-kyushu, Japan, July 15-17, 2014.

Maharjan M and Takahashi A. Numerical simulation of liquefaction-induced deformation of embankments on non-homogeneous foundation. 8th European Conference on Numerical Methods in Geotechnical Engineering, Delft, The Netherlands, June 18-20, 2014.

Maharjan, M. and Takahashi, A. Performance of embankments on liquefiable foundation subject to sequential ground motions, International Journal of Landslide and Environment, Vol. 1, No.1, pp. 57-58, 2013.

Maharjan M and Takahashi A. Centrifuge model tests on liquefaction-induced settlement and pore water migration in non-homogeneous soil deposits. Soil Dynamics and Earthquake Engineering; 55: 161-169, 2013.

Maharjan M. and Takahashi A. Excess pore pressure dissipation in non-homogeneous soil deposits supporting earthen embankments. 15th JSCE International Summer Symposium, Chiba, Japan, September 4-6, 2013.

Maharjan M and Takahashi A. Liquefaction-induced Deformation of Embankments on Non-homogeneous Foundation Subject to Sequential Ground Motion. Fifth Multidisciplinary International Student Workshop (MISW2013), Tokyo, Japan. 2013.

Maharjan M and Takahashi A. Effects of non-homogeneity on liquefaction in stratified soil deposits. Tenth International Conference on Urban Earthquake Engineering (10CUEE), Tokyo, Japan, pp. 483-92, March 1-2, 2013.

Shakya K, Pant DR, Maharjan M, Wijeyewickrema AC, and Maskey PN. Seismic response of non-engineered buildings in Nepal during September 18,2011 Nepal-Sikkim Earthquake. Tenth International Conference on Urban Earthquake Engineering (10CUEE), Tokyo, Japan, 1985-90, March 1-2, 2013.

Maharjan M and Takahashi A. Liquefaction centrifuge modeling in non-homogeneous soil deposits. 15th World Conference on Earthquake Engineering, Lisbon, Portugal, September 24-28, 2012.

Maharjan M and Takahashi A. Seismic response of non-homogeneous soil deposits: centrifuge modeling. The Seventh Asian Young Geotechnical Engineers Conference (7AYGEC), Tokushima, Japan, 141-149, September 12-14, 2012.

Maharjan M and Takahashi A. Seismic response of non-homogeneous soil deposits in centrifuge test. Fourth Multidisciplinary International Student Workshop (MISW2012), Tokyo, Japan, 2012.

Shakya K, Pant DR, Maharjan M, Wijeyewickrema AC, and Maskey PN. Lessons learned from performance of buildings during the September 18, 2011 earthquake in Nepal. Asian Journal of Civil Engineering; 14 (5): 719-733, 2012.


Presentations

Maharjan M. Soil Liquefaction during April 25 M7.8 Gorkha Earthquake and Consequences. Invited talk, Guthi Seminar, London, UK, 2016.

Maharjan M and Takahashi A. Effects of Non-homogeneity on Liquefaction-induced Deformation of Embankments. Paper presentation, 9th annual AOTULE – University of Melbourne, Australia, November 27-28, 2014.

Maharjan M and Takahashi A. Numerical analysis on effects of non-homogeneity in the liquefaction-induced deformation of embankments. Paper presentation, International Symposium Geohazards: Science, Engineering and Management, Kathmandu, Nepal, November 20-21, 2014.

Maharjan M and Takahashi A. Numerical analysis of earthen embankments on liquefiable non-homogeneous soil deposits. Paper presentation, 49th Geotechnical Engineering workshop, Kita-kyushu, Japan, July 15-17, 2014.

Maharjan M and Takahashi A. Numerical simulation of liquefaction-induced deformation of embankments on non-homogeneous foundation. Paper presentation, 8th European Conference on Numerical Methods in Geotechnical Engineering, Delft, The Netherlands, June 18-20, 2014.

Maharjan M. and Takahashi A. Excess pore pressure dissipation in non-homogeneous soil deposits supporting earthen embankments. Paper presentation, 15th JSCE International Summer Symposium, Chiba, Japan, September 4-6, 2013.

Maharjan M and Takahashi A. Effects of non-homogeneity on liquefaction in stratified soil deposits. Paper presentation, Tenth International Conference on Urban Earthquake Engineering (10CUEE), Tokyo, Japan, March 1-2, 2013.

Maharjan M and Takahashi A. Liquefaction centrifuge modeling in non-homogeneous soil deposits. Paper presentation, 15th World Conference on Earthquake Engineering, Lisbon, Portugal, September 24-28, 2012.

Maharjan M and Takahashi A. Seismic response of non-homogeneous soil deposits: centrifuge modeling. Paper presentation, The Seventh Asian Young Geotechnical Engineers Conference (7AYGEC), Tokushima, Japan, September 12-14, 2012.

Prior Experience

Atkins, Geotechnical Engineer, 2015 – 2018

Civil Engineer, Hydro-Consult Engineering Limited, March – August 2010

Project Experience

Developed the design subsurface profile for the new Hinkley Point C Nuclear Power Plant. Performed seismic site response analysis for each nuclear building. Conducted 3D soil-structure interaction in FLAC3D. Generated time histories matching the design spectrum for input to the structural analysis. Worked closely with structural engineers to validate the FLAC3D and ABAQUS results. Responsible for performing settlement analysis in FLAC3D and completing sensitivity studies to verify the modeling parameters and inputs used in the numerical analyses.

Performed the detailed onshore ground investigation of the Wylfa Newydd Nuclear Power Station site. Interpreted the in-situ seismic data acquired for the design of the Nuclear Power Station. Determined the geotechnical design parameters for Wylfa Newydd Nuclear Power Station site. Assessed the site wide quantification of rock classes.

Evaluated the geological setting and developed a seismotectonic model in the region of the South Lokichar Basin in Kenya. Provided a preliminary high-level assessment of seismic hazards and geohazards in the region, focusing around the oil field locations. Responsible for generating seismic hazard and geohazards constraints map.

Led a research and development project to demonstrate the performance of levees during earthquakes (the project was funded by Ministry of Land, Infrastructure, Transport and Tourism, Japan). Investigated the deformation mechanism of embankments on non-homogeneous foundations under sequential ground motions by dynamic centrifuge testing and advanced numerical simulation. Investigated the liquefaction mechanism in non-homogeneous soil deposits. Proposed different mitigation alternatives for liquefaction-induced deformation of embankments on non-homogeneous foundation. Involved in the design of dam and headwork components for the Kabeli-A Hydroelectric Project in eastern Nepal.

Additional Information

Peer Reviewer

Journal of Earthquake Engineering and Engineering Vibration

Journal of Soil Dynamics and Earthquake Engineering

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Geotechnical Engineering, 2015
  • M.Eng., Geotechnical Engineering, 2012
  • B.Eng., Civil Engineering, 2010

LICENSES & CERTIFICATIONS

Licensed Professional Civil Engineer, Nepal

LANGUAGES

  • Nepali
  • Hindi
  • Japanese