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    OBITUARY

    Alan W. Bishop1920-1988Professor Alan Bishop died suddenly at his homein Whitstable, on 30 June 1988, while recoveringfrom major cardiac surgery. He will be remem-bered especially for his work on embank mentdams and for his flair in instrument design whichenabled him to become perhaps the foremostexperimentalist of his time.

    Alan Wilfred Bishop was born a t Whitstableon 27 May 1920. He was educated at KingsCollege S chool, W imbledon, and at the Uni-versity of Cam bridge, where he was a seniorscholar at Emm anuel College and took theMec hanical Sciences T ripos in 194 2. His firstappointment was as an engineer with the Metro-politan Wa ter Board. At that time, the designs forthe Walto n Reservoir were being reassessed in thelight of the experience gained from studies intothe causes of failure of the Chingford dam. T hesestudies were conducted at the Building ResearchStation, and Alan Bishop was seconded to workthere w ith the soils group. While at the BRS, hedesigned and built his own equipment for testingfoundation soils, and for taking soil samples. Thisearly work typified the approach used by Bishop,in that h e always insisted that the best possiblesoil test data should be used in any analysis. Ifthe appara tus available could not give the qualityof data he required then he simply devised andbuilt equipment that would. U sually the appar-atus produced was so much better th an thatcurrently available that the commercial manufac-turers switched to his designs.

    Alan Bishop was equally at home with analyti-cal studies and, combining this with his practicalability, he was the obvious choice as the firstmemb er of the soils team Professor Skem pton setup at Imperial College. Bishop moved to take upan appointment as an assistant lecturer inOctober 1946. At Imperial College he continuedto design and develop new soils test and sam plingequipment, but now the equipmen t was used tostudy fundame ntal properties of soil behaviour aswell as to obtain results required for engineeringproblems. Theory and practice, w elded togetherby continually checking one against the other:this was the formula used so successfully byBishop.

    Academ ic distinctions followed-promoted tolecturer in 1947, PhD in 1952, Reader and DS c in1957, Professor of Soil Mechanics in 1965.Hono urs were also conferred by the profession inrecognition of his contributions. Premium s and

    prizes were awarde d by the Institution of CivilEngineers and the British Geotechnical Society.

    Alan Bishops first experience in soil mechanicswas with earth retaining structures, and he usedthis branch of study as a vehicle for his researchwork.

    Because of his deep understanding of soilbehaviour, Bishop w as always in demand and hisadvice was sought by many firms of consultingengineers. He was also asked to investigate thecauses of engineering failures, perhaps the mostnotable being that of Aberfan in October 196 6.Bishop led the team of investigators at the tri-bunal and the outcome was to have a profoundeffect on the mining industry in terms of thestatutory provisions with regard to safety.

    Alan Bishop wa s an international figure andregularly travelled abroad to lecture. Bishopspublic lectures were notable in that they werealways crowded. Tw o halls were needed for hisRankin e Lecture in 196 6 on The strength of soilsas engineering materials; engineers coming fromfar and wide. A ll of his lectures were invariablypacked with interest a nd incisive comm ent and itpaid to be early in the lecture hall so as to securea seat close to the front, b ecause this famous manwas intensely shy and spoke very softly.

    Imperial College was fortunate when ProfessorSkem pton asked A lan Bishop to join the staff, notonly because of the reasons highlighted above,but because he took a great interest in the devel-opment of the soils section and in the welfare ofthe staff and students. He was Dea n of the Cityand Guilds College for three years from 197 0 to1973.

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    654 OBITUARYAlan was a keen sailor, and kept a convertedlifeboat at Faversham. When time permitted, hewould sail in the Thames estuary and up-river,his crew recruited from the current group ofresearch students.Unfortunately, Alan Bisho p was not blessed

    with robust health and he had to retire in 1980.After this time he became a Senior ResearchFellow from 1980 to 1983 and the title of Emer-itus Professor was conferred. Single throughouthis college life, Alan wa s now fortunate to meetand marry M yrtle. Myrtle and Alan embarked ona new life which was spent in Scotland during thespring and summ er, returning to their home inWh itstable for the winter. These last five yearswere short but happy ones.Angus Skinner

    Professor A. W. Skempton adds:It was a great privilege and the best of goodfortune to be associated for nearly 40 years withone of the finest intellects in our subject. In norespect w as his intellectual power seen moreclearly than in his continued study of Terzagh isprinciple of effective stress and its application inall branches of geotechnical engineering; his wor kin this field brough t about a highly beneficial rev-olution in soil mechan ics.As for his skill as an experimentalist, AlbertCaquot, the distinguished French academician,exclaimed after a visit to the laboratory atImperial College, this is the country of Mic haelFaraday . Bisho p was totally and very seriouslydevote d to soil mechan ics, both as a scientist andan engineer.Though reserved in a manner compatible withhis Quaker faith, he appreciated a good sense ofhumour. He was loved and respected by hisnumerous research students, w ho came from allparts of the world. Through them and the strictbut friendly criticism of his colleagues wor k, andhis own important contributions, he exerte d aunique influence.

    BIBLIOGRAPHY1946. The leakage of a clay core-wall. Trans. Inst.W at er Engrs 51,97-l 16 .1948. Part III-Strength variations in London Clay.Silicates Industriels 13, No. 9, 109-I 13.194 8. A large shear box for testing sand s and g ravels.Proc. 2nd Int. ConJ Soil Mech. 1,207-211.194 8. Some factors involved in the design of a largeearth dam in the Thames valley. Proc. 2n d Int. Conf.Soil Mech. 2, 13-18.194 8. Driving and loading tests on six precast concretepiles in gravel. Gtotechnique 1, 49-58. Co-authors:V. H. Collingridge & T. P. OSullivan.194 8. A new sampling tool for use in cohesionless sandsbelow ground water level. Gtotechnique 1, 125-131.

    195 0. Undrained triaxial tests on saturated sands andtheir significance in the general theo ry of shearstrength. Gbotechnique 2, 13-32. Co-author: A. K.G. Eldin.195 0. The measurem ent of the shear strength of soils.GCotechnique 2, 9&1 08. Co-author: A. W. Skemp-ton.195 3. The effect of stress history on the relation between4 and porosity in sand. Proc. 3rd Int. Conf: SoilMech. 1 , 100-105. Co-author: A. K. G. Eldin.195 3. Pore pressure changes d uring shear in two undis-turbed clays. Proc. 3rd Int . Conf: Soil Mech. 1,94-99. Co-author : D. J. Henkel.195 3. A constant pressure control for the triaxial com-pression test. GCotechnique 3, 339-344. Co-author:D. J. Henkel.1954. Soils. Building ma terials: t heir elasticity and inelas-ticity. (Ed. M. Reiner). North Holland Publishing,417482.1954. Correspondence. Gtotechnique 4,4345.

    1954. The use of slip circle in the stability analysis ofslopes. Proc. Euro. Co@ S tabilit y of Earth Sl opes 1,1-13.195 4. The use of pore pressure coefficients in practice.Ghotechnique 4, 148-152.195 5. The g ain in stability due to pore pressure dissi-pation in a soft clay foundation. Proc. 5th Cong.Large Dams 1, 61-38. Co-author: A . W. Skemp-ton.195 7. Earth pressure and the design of earth retainingstructures. The analy sis of engineering structures(A. J. S. PiDDard & J. F. Baker.) Edward Arnold.490-514. --

    195 7. Some factors controlling the pore pressures set upduring the construction of earth dam s. Proc. 4th Int.Co@ Soil Mech. 2,294300.195 7. Em bankm ent dams: principles of design and sta-bility analysis. Hydro-electric engineering practice(Ed. J. Guthrie-Brown). Blackie, 34940 6.1957. The measurement of soil properties in the triaxialtest. Edward Arnold. Co-author: D. J. Henkel.1962. The measurement of soil properties in the triaxialtest. (2nd Edn) Edward Arnold. Co-author: D. J.Henkkl. 195 8. Test requirements for measuring the coefficient ofearth pressure at rest. Proc. Con/I Earth PressureProblems, Brussels 1.2-14.

    195 9 The principle of effective stress. Teknisk Ukeblad106,859-863.196 0. Stability coefficients for earth slopes. Gtotechnique10, 129-150. Co-author: N. Morgenstem.1961. The measurement of pore pressure in the triaxialtest. Proc. Con& Pore Pressure and Suct ion in Soils.Butterworth, 3846.1961. Pore pressure observations at Selset Dam. Proc.Conf. Pore Pressure and Suction in Soils . Butter-worth, 91-102. Co-authors: M. F. Kennard &A. D. M. Penman.196 0. The relevance of the triaxial test to the solution ofstability problems. Proc. Res. Conf: Shear Strength ofCohesive Soils, 437-501 . Co-author: L. Bjerrum.196 0. Factors controlling the strength of partly saturat-ed cohesive soils. P&c. Res. C&$ Sh;ar Strength ofCohesive Soils. 503-532. Co-authors: I. Aloan. G. E.Blight & I. B. Donald. _1960. Discussion. Proc. Res. Con& Shear St rength of

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