Introduction for the 46Th Rankine Lecture
Total Page:16
File Type:pdf, Size:1020Kb
[doi: 10.1680/geot.2008.58.9.693] Introduction for the 46th Rankine Lecture The 46th Lecture of the British Geotechnical Society was given by Professor Robert J. Mair at Imperial College London on 22 March 2006. The following introduction was given by Professor R. N. Taylor, City University Mr Chairman, distinguished guests, ladies and gentlemen, it is both an honour and an immense pleasure to introduce this evening Professor Robert Mair, the British Geotechnical Association’s 46th Rankine Lecturer. Robert James Mair was born in 1950 and brought up in Cambridge, a place that has had a deep influence on his life and career. He read engineering at Clare College, and was inspired by the lectures on soil mechanics given by Peter Wroth. On graduating in 1971 he was determined to work for a company with geotechnical engineering prominent in its portfolio. That company was Scott Wilson Kirkpatrick and Partners, and it was a happy coincidence that on his first day in their offices he was given a desk next to David Hight, who was to become one of Robert’s closest colleagues and influential friends. (And I would like to say now that David is very disappointed to have been called overseas and is not able to be here today.) It was not too long before Robert moved to the Hong Kong office of SWK, and in those heady days experienced a truly dynamic engineering environment, which proved to be a great beginning for an engineer fully tuned to learning quickly. Robert’s venture to Hong Kong came to an end with an offer from Andrew Schofield to undertake research at Cam- bridge University. Scott Wilson Kirkpatrick agreed to second Robert to the Cambridge Soils Group, where major research was being supported by Myles O’Reilly of the then Trans- Professor R. J. Mair port and Road Research Laboratory, who was keen to get some science into the understanding of tunnel stability and manner of technical, sporting, political or personal discus- the development of ground movements. It started Robert’s sions. professional association with tunnelled excavations for which Robert’s professional expertise has seen him involved with he is now world renowned. a wide range of projects, and he has accomplished a great Robert became the natural leader of the informal tunnel- deal. With Chris Padfield he produced CIRIA Report 104 on ling and buried pipes research group at Cambridge, and the Stability of retaining walls, which became one of created a strong sense of team responsibility, leading to CIRIA’s most used publications and was hugely influential. sound, well-organised research. I count myself fortunate to He was closely involved with the Jubilee Line Extension have become part of that group, and to have got to know Project, Crossrail, the Channel Tunnel Rail Link, London Robert at that time. They were great times, with Robert Underground’s Angel Station reconstruction project and the clearly the team leader, working hard to get the most out of Waterloo escalator tunnel, the last leading to the develop- people but also creating a fun atmosphere, including arran- ment and use of a new technique for the control of tunnel- ging cricket competitions with the Imperial College soil induced ground movements termed ‘compensation grouting’, mechanics group. Robert’s own research made use of the a phrase coined by David Hight. In fact there is barely a then relatively new technique of geotechnical centrifuge tunnel in London that does not have Robert’s name on it. modelling. This resulted in seminal research on tunnel Robert’s breadth of expertise, sense of organisation and stability, perhaps remaining the best illustration of centrifuge diplomatic skills have made him a natural choice for many modelling applied directly to geotechnical design, and which expert review panels, advisory panels and other committees is still regularly cited today. including, importantly for me, the Board of the International Robert returned to Scott Wilson Kirkpatrick in 1980, but Society for Soil Mechanics and Geotechnical Engineering. it was not too long before he was seeking new challenges. Throughout, Robert has retained an interest in teaching In 1983 an opportunity arose for Robert to join forces and education. He was a key contributor to the short courses with David Hight and Peter Vaughan, both then of Imperial on tunnelling in soft ground given at City University, and in College, to create a specialist geotechnical office known to 1997 became Royal Academy of Engineering Visiting Pro- us all now as the Geotechnical Consulting Group. There fessor at Cambridge University. The lure of Cambridge was was no certainty then that this adventure could ever be again taking hold, and in 1998 he moved back there, this successful, but we have witnessed the company grow from time as Professor of Geotechnical Engineering. He quickly its origins in the small two-room office in Kendrick Mews took charge of the Soil Mechanics Group and instilled a to what is now one of the world’s leading specialist strong team spirit, ensuring a well-organised, highly moti- geotechnical companies. It has always been a pleasure to vated and committed research group. His own research visit the GCG offices. I find there a convivial atmosphere projects focused on practical geotechnical engineering pro- that so strongly reflects Robert’s character, and have en- blems, and allowed the Centre for Construction Processes to joyed many a picnic lunch in the kitchen, engaging in all be created in the Schofield Centre at the west Cambridge 693 694 MAIR site. He clearly made his mark elsewhere on the Cambridge of people, immensely supportive, and always prepared. To scene, and it was not long before he came to the attention these talents he adds those of a fantastic mimic and regularly of the fellows at Jesus College, who elected him Master in does ‘takes’ on many characters, a particular speciality being 2001. his wonderful impersonation of the late Bill Ward. With all these responsibilities, it seems hard to imagine He is a brilliant communicator, and has a talent for there is any time to relax. In his spare time he will enjoy a simplifying problems while retaining the key issues. He has game of tennis or a round of golf and go sailing when the an undying enthusiasm for the subject of soil mechanics and opportunity arises. But, more importantly, Robert always its practice in engineering, and he is genuinely interested in makes sure he has time for his family—his wife Margaret understanding and solving problems that the ground throws and children Julia and Patrick. up. With this he has established a reputation for thorough- Robert is truly one of the good guys. He is always friendly ness and professionalism in his reports, research and teach- and hospitable, always polite and generous, and always inter- ing. I am sure these characteristics will be evident in this ested in the people he meets. He is invariably calm and evening’s presentation, and with this in mind it is with great relaxed, and puts people at ease. He is exceptionally well pleasure and anticipation that I call upon Professor Robert organised, a great team leader who naturally gets the best out Mair to deliver the 46th Rankine Lecture. Mair, R. J. (2008). Ge´otechnique 58, No. 9, 695–736 [doi: 10.1680/geot.2008.58.9.695] Tunnelling and geotechnics: new horizons R. J. MAIR* New developments in both the theory and the practice of La communication porte sur des de´veloppements nou- tunnelling are covered in the lecture. The important veaux dans la the´orie et la pratique du percement de relationship between tunnelling and geotechnics is high- tunnels, et met en valeur les rapports existants entre le lighted, and recent advances in research and practice are percement de tunnels et la ge´otechnique. On y de´crit des described, drawing on model studies, theoretical develop- progre`sre´alise´sre´cemment, de´coulant d’e´tudes de mod- ments and field measurements from case histories from e`les, de de´veloppements the´oriques et de mesures sur around the world. Simplified plasticity models are pre- place issus d’histoires de cas dans le monde entier. Des sented that can be used by designers to assess ground mode`les a` plasticite´ simplifie´e, pouvant eˆtre utilise´s par movements and tunnel lining loads in complex ground des concepteurs pour e´valuer les mouvements du sol et conditions. The important role of pilot tunnels and in situ les charges des reveˆtements du tunnel dans des conditions measurements to validate such models, drawing on a case complexes du sol, sont de´crits. On y de´crit e´galement le history from Bolu, Turkey, and on other tunnelling pro- roˆle important que jouent des tunnels pilote et des jects, is described. Recent technical advances in earth mesures in-situ dans la validation de ces mode`les, sur la pressure balance tunnelling are considered, illustrated by base d’une histoire de cas a` Bolu, en Turquie, et de measurements from the Channel Tunnel Rail Link pro- projets de percement de tunnels divers. On examine des ject, with emphasis on key factors influencing volume progre`s techniques re´alise´sre´cemment dans le percement loss, such as face pressure, soil conditioning and effective de tunnels avec e´quilibre de la pression terrestre (EPB), screw conveyor operation. A recent case history in Bolog- illustre´s par des mesures effectue´es dans le cadre de la na is described, in which the innovative use of directional liaison ferroviaire du Tunnel sous la Manche, en mettant drilling to install curved grout tubes was employed for a l’accent sur des facteurs cle´ influant sur des pertes de compensation grouting project in granular soils.