TC106 Unsaturated Soils

Unsaturated Soils

Disseminate knowledge and practice in the area of mechanics of unsaturated soils including as examples, expansive, collapsible, residual, arid, and compacted soils:

  • Organize specialty conferences, symposiums and workshops.
  • Encourage preparation of keynote lectures, state-of-the-art lectures including new technology, general reports for conferences organized by the International Society, regional conferences and conferences organized by Member societies.


To establish guidelines and technical recommendations in the field of unsaturated soils:

  • Promote benchmark exercises to establish the capabilities of current theoretical frameworks and prediction methodologies in unsaturated soil mechanics.
  • Promote the exchange of information about testing of unsaturated soils for geotechnical and geoenvironmental purposes.

Assist with technical programs of international and regional conferences organized by the ISSMGE:

  • Promote the presentation of findings of the TC in main sessions and discussion sessions.
  • Promote TC106-sponsored sessions on unsaturated soils at ISSMGE sponsored international and regional conferences on soil mechanics and geotechnical engineering, and to support special geotechnical and geoenvironmental conferences on unsaturated soils.

Interact with industry and overlapping organizations working in areas related to the TC's specialist area:

  • Cooperate actively with other technical committees whose field of activity involves important questions related to unsaturated soils: TC208 Slope Stability in Engineering Practice; TC210 Dams and Embankments and TC215 Environmental Geotechnics.

# Type Full Name Country
1 Chair David Toll United Kingdom
2 Vice Chair Bernardo Caicedo Colombia
3 Secretary Adrian Russell Australia
4 Nominated by TC Chair Pierre Delage France
5 Nominated by TC Chair Gerald Miller United States
6 Corresponding Member Arman Khoshghalb Australia
7 Nominated Member Claudio Mancuso Italy
8 Nominated Member EDUARDO ROJAS GONZALEZ Mexico
9 Corresponding Member Ehsan Nikooee Netherlands
10 Nominated Member Cristina Jommi Netherlands
11 Nominated Member Oscar Mooijman Netherlands
12 Corresponding Member Deneys Schreiner United Kingdom
13 Corresponding Member Chan-Young Yune South Korea
14 Nominated Member Alessio Ferrari Switzerland
15 Nominated Member Simon Wheeler United Kingdom
16 Nominated Member Akbar Javadi United Kingdom
17 Nominated Member ORÊNCIO VILAR Brazil
18 Nominated Member DIEGO GUILLERMO MANZANAL Argentina
19 Nominated Member LUCIANO OLDECOP Argentina
20 Nominated Member Gabriele Della Vecchia Italy
21 Nominated Member Harianto Rahardjo SEAGS
22 Corresponding Member Hadi Khabbaz Australia
23 Corresponding Member Enrique Romero Spain
24 Corresponding Member Antonio Gens Spain
25 Nominated Member Viroon Kamchoom Thailand
26 Corresponding Member Apiniti Jotisankasa Thailand
27 Corresponding Member Sandra Houston United States
28 Nominated Member Xiong Zhang United States
29 Nominated Member Zdzisław Skutnik Poland
30 Corresponding Member Francesca Casini Italy
31 Nominated Member Wojciech Slowski Finland
32 Nominated Member Farimah MASROURI France
33 Nominated Member Nasser Khalili Australia
34 Nominated Member Gabriela Brandusa Cazacu Romania
35 Nominated Member Emőke Imre Hungary
36 Nominated Member Fernando Marinho Brazil
37 Nominated Member S. Sreedeep India
38 Nominated Member Anthony Leung Hong Kong Special Administrative Region
39 Nominated Member Javier Quintana Spain
40 Nominated Member Kazimierz Garbulewski Poland
41 Nominated Member Nuria Pinyol Spain
42 Nominated Member Rafaela Cardoso Portugal
43 Nominated Member H.W. Sun Hong Kong Special Administrative Region
44 Corresponding Member Tomoyoshi NIshimura Japan
45 Corresponding Member Geoff Chao United States
46 Nominated Member Laureano Hoyos United States
47 Nominated Member Chia-Cheng Fan Chinese Taipei
48 Nominated Member Changfu Wei China
49 Nominated Member Hirofumi Toyota Japan
50 Nominated Member Atsushi Iizuka Japan
51 Nominated Member Yu-Jun CUI France
52 Nominated Member Behrouz Gatmiri Iran
53 Nominated Member Robert Charlier Belgium
54 Nominated Member Panagiotis Sitarenios Greece
55 Nominated Member Michael Bardanis Greece
56 Nominated Member David Masin Czech & Slovak Republics
57 Nominated Member Kartal Toker Turkey
58 Nominated Member Huriye Bilsel Turkey
59 Nominated Member Seyed Mohsen Haeri Iran
60 Nominated Member Seong-Wan Park South Korea
61 Nominated Member Indarto Indarto Indonesia
62 Nominated Member Daichao Sheng Australia
63 Nominated Member Sai Vanapalli Canada
64 Nominated Member Delwyn Fredlund Canada
65 Nominated Member S. Rajesh India
66 Nominated Member Peter Van Impe Belgium
67 Nominated Member Liangtong Zhan China

Asia-Pacific Conference on Unsaturated Soils, Nagoya, Japan

The Japanese Geotechnical Society (JGS) and TC106 of ISSMGE hosted the 7th Asia-Pacific Conference on Unsaturated Soils (AP-UNSAT2019) in August 2019 at Nagoya City, the geographical center of Japan. We had 220 participants from seventeen countries and regions, among which t

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Professor Del Fredlund presents Jennings Lecture at ARCSMGE

Unsaturated Soil Mechanics will have a high profile at the 17th African Regional Conference on Soil Mechanics and Geotechnical Engineering.

Prof. Delwyn Fredlund will present the Jennings Lecture at the conference with the title of Determination of unsaturated soil proper

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Unsaturated Soils Course at the African Regional Conference SMGE

TC106 (with support for TC107 on Lateritic Soils) is running a Course on Unsaturated Soil Mechanics during the 17th African Regional Conference on Soil Mechanics and Geotechnical Engineering in Cape Town, South Africa on Monday 7th October, 2019.

Presentations will be given by

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Vol. 5, Issue 1 of the IJGCH has been released!

We are pleased to announce the special Issue #1 of Volume #5 of the International Journal of Geoengineering Case Histories, an official Journal of the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE).

This Special Issue presents recent case histor

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7th Asia-Pacific Conference on Unsaturated Soils

DATE: August 23~25, 2019
Host: The Japanese Geotechnical Society. Supported by: TC106 Unsaturated Soils of ISSMGE

Venue: Nagoya Congress

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TC106 Discussion Sessions at ICSMGE, Seoul 2017

TC106 is organising 3 discussion sessions on Unsaturated Soils at the 19th International Conference on Soil Mechanics and Geotechnical Engineering at Seoul in September 2017.

TC106 Discussion Sessions

Thursday 21st September 2017, 09:00-15:00

Room 203A/B, COEX Conventio

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Unsaturated Soils Workshop at ICSMGE, Seoul 2017

TC106 is organising a workshop on Unsaturated Soils at the 19th International Conference on Soil Mechanics and Geotechnical Engineering at Seoul in September 2017.

The State of Practice in Unsaturated Soil Mechanics

TC106 Workshop. Wednesday 20th September 2017, 09:00-10:3

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Blight Lecture at ICSMGE, Seoul 2017

Blight Lecture

The 19th International Conference on Soil Mechanics and Geotechnical Engineering at Seoul, September 2017 will host the 2nd Blight Lecture. The Blight Lecture is the Honour Lecture for Unsaturated Soils, nominated by the TC106 committee.

Professor Delwyn Fredlund

The 2nd Blight Le

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7th International Conference on Unsaturated Soils


On behalf of TC106 and Hong Kong Geotechnical Society, the HKUST is pleased to invite you to attend the 7th International Conference on Unsaturated Soils (UNSAT2018) in August 2018. This conference will provide an excellent opportunity for worldwide academics, engineers, scie

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2nd PanAmerican Conference on Unsaturated Soils

On behalf of the Unsaturated Soils Technical Committee of the Geo-Institute (G-I) of the American Society of Civil Engineers (ASCE), and the TC 106 committee on Unsaturated Soils of the International Society of Soil Mechanics and Geotechnical Engineering (ISSMGE), you are cor

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Unsaturated Soil Mechanics in Transportation Geotechnics

A session on Unsaturated Soils was organised by David Toll, Eduardo Alonso and Claudia Zapata at the 3rd International Conference on Transportation Geotechnics in Guimarães, Portugal in 2016. The papers are available on-line as Chapter 2: Unsaturated Soil Mechanics in Tran

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3rd European Conference on Unsaturated Soils, Paris 2016

The Proceedings of the 3rd European Conference on Unsaturated Soils, Paris 2016 are available on-line at:

The happy delegates who attended the conference are shown below!

E-UNSAT 2016 Group Photo

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Host Member Society: UK

Short name: Unsaturated Soils (TC106)

GeoWorld GroupUnsaturated Soils (TC106)

Contact Technical Committee : Unsaturated Soils