The British Geotechnical Association (BGA) is the principal
association for geotechnical engineers in the United Kingdom.

2020 John Mitchell Lecture

BGA Meeting
  • 22.01.2020
  • 18:30 - 20:00
  • Institution of Civil Engineers, One Great George Street, Westminster, London SW1P 3AA
  • Organiser: British Geotechnical Association
  • Download to Calendar
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2020 John Mitchell Lecture

The Temporary Support of Excavations


Stuart Marchand, the Wentworth House Partnership

Wednesday 22nd January 2020 at 18:30 hours

Institution of Civil Engineers, One Great George Street, Westminster, London SW1P 3AA

The 2020 John Mitchell Lecture will be delivered by Stuart Marchand of Wentworth House Partnership. The lecture will be held on Wednesday 22nd January 2020 at 18:30 hours. Registration and tea & coffee will be available from 18:00.

Please join us afterwards for drinks sponsored by Wentworth House Partnership.

This event is free to attend, but advance booking is required, via a link at the bottom this page.

The event will be webcast live and can be viewed via this link.

An event flyer can be downloaded here.

The John Mitchell Award is presented annually by the ICE, based on a nomination from the BGA, for significant contributions in the field of geotechnical engineering. The award was instituted in 2008 in memory of the prominent geotechnical engineer John Mitchell of Arup, who was killed while observing piling works at a central London site in 1990.

The award criteria considered by the BGA include the following:

  • In reflection of John Mitchell’s career, selection will favour practical applications of up to date geotechnical concepts or models (rather than advanced theoretical academic practice).
  • The BGA will consider individuals, like John, who in the course of their careers via incremental works have made significant contribution to geotechnical practice.
  • Notwithstanding the above, the BGA will in addition consider any contemporary practitioner who has instigated a major advance in the geotechnical field, thus opening the award up to the innovative, regardless of age or incremental contribution count.

Stuart has made significant contributions to geotechnical engineering in the fields of temporary works


The talk will provide a wide-ranging review of the type of support available for providing ground support and their limitations of use for deep excavations. This will include discussion on connection details, why these are important and where they can go wrong. The challenges associated with underpinning excavations will also be explored. Stuart will address a comparison between permanent works and temporary works and the factors to consider in making this distinction. The lecture will consider construction sequences and methods for deep basements leading into a discussion on the possibilities for constructing a 3-storey basement. This will include the significance of propping levels and how these can affect the works.


Stuart Marchand, MA(Cantab) FICE FIStructE, graduated from Cambridge in 1973 and spent the majority of his first 8 years of experience in heavy civil engineering on road and bridge construction and on the Thames Barrier.

He transferred to the temporary works design sector of the industry and joined Costain Construction’s temporary works department as Senior Design Engineer, progressing to Chief Engineer in 1991. He was involved in many major developments with deep basements such as the 7-storey underground car park in Aldersgate and 12-15 Finsbury Circus, a 16m deep open cut basement.

In 1999 he left to set up Wentworth House Partnership which he has developed as a specialist Temporary Works Consultancy. Stuart has written and contributed to a variety of publications including the ICE proceedings on Civil Engineering, Geotechnical Engineering, Forensic Engineering as well as The Structural Engineer and CIRIA C761 (tower cranes foundations).

He currently spends most of his time developing and mentoring the staff within Wentworth House Partnership

Drinks sponsor

Please join us afterwards for drinks sponsored by Wentworth House Partnership.

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