ICE - Institution of Civil Engineers - Virtual Library

422 CORRIQENDA. CORRIGENDA, March 1947 Journal : p. 55, lines 15 and 16. Pm " 29th May, 1925. " read " in June 1922." p. 55, footnote. Pm " A. Hiley, " A Rational Pile-driving Pormula and its application in piling practice explained," Ertgng, Lond., vol. 119 (1925), p. 657 (29 May, 1925) " read " A. Hiley, " The Efficiency of the Hammer Blow, and its Effects with Reference bo Piling," Engrtg, Lond...

FOUNDATIONS ON ROCK.
EXPERIMENTAL EVIDENCE AND THEORETICAL APPROACHES IN UNSATURATED SOILS.
GEOTECHNICAL ENGINEERING EDUCATION AND TRAINING.
GEOENGINEERING IN ARID LANDS.
SOILS AND WAVES: PARTICULATE MATERIALS BEHAVIOUR, CHARACTERISATION AND PROCESS MONITORING.
TUNNELLING: MANAGEMENT BY DESIGN.
LAND SURFACE EVALUATION FOR ENGINEERING PRACTICE. (Engineering Geology Special Publication No. 18.)
MANAGING GEOTECHNICAL RISK—IMPROVING PRODUCTIVITY IN UK BUILDING AND CONSTRUCTION.
3-D STRUCTURAL GEOLOGY: A PRACTICAL GUIDE TO SURFACE AND SUBSURFACE MAP INTERPRETATION.
BREAKING OLD GROUND. BURA GUIDE TO CONTAMINATED LAND ASSESSMENT & DEVELOPMENT.

CONCERNING! PRE-STRESSED CONCRETE. 115 Discussion. The Author, in introducing his Paper, mentionedthat thedisadvantage of the system using four jacks instead of the double-action jack was that, naturally, the anchoring-block thus formed had to stand outside the concrete member, instead of being embodied in it ; but that was a very small disadvantage, and the system was being used for the construction of roof principals for sheds of 120 feet span. The tests of the 62-foot test-beam had been very extensive, and, in fact, thousands of readings were registered...

16 SNOW ON RIVER WALLS, every foot in order that the pipe could be raised or lowered to suit the water-level. ACKNOWLEDGEMENTS. The Author wishes to express his thanks toMessrs. J. Lomax Simpson, S. Woolley, and G. B. Lissenden, and to Messrs. Holland & Hannen and Cubitts, Ltd., for permission to reproduce illustrations. The Paper is accompanied by fourteen sheets of drawings and twentyfour photographs,from which the folding Plates, the half-tone page Plates, and the Figures in the text have been prepared...

28 37. C. H. Gosswein. 38. 39. DISCUSSION ON SOME DEFECTS IN " Scale-Free Pavements made with Air-Entraining Portland Cement ",Rds and Str., 1943, 86 ( I I ) , 57-8. (Road Abstr., 1944,11, No. 273.) H. L. Kennedy. `` The Function of Entrained Air in Concrete ", J. Amer. Concr. Inst., 1943,14 (Proceedings,39) (6), 52942...

DISCUSSION ON A NEW PILING FORMULA. 55 Discussion. The Author introduced t,hePaper with the aid of a series of lantern slides. Mr. Ewart S. Andrews observed that the Paper was characterized by the scholarship and originality which the Author had shown in all his previous work. The Author had been rather critical of Mr. Alfred Hiley, especially in regard to the suggestion that Mr. Hiley had invented the efficiency factor. As a matter of fact, Mr. Hiley had obtained the efficiency factor from a small book written by Mr...

246 M~. DISCUSSION ON HIGH-SPEED MOTORS [Minutes of but little radiating surface, and no means of getting air to the core. Dr. Hopkinson had affirmed that work was expended in magnetizing the iron of the core, no matter how much it was subdivided. This work mustreappearinthe form of heat,andthedrumarmature should therefore be found defective in this respect. Dr. Hopkinson said that it didnot become heated, and Mr. Kapp could only assume that some element was present whichprevented thisheating,butwhichasyet was not understood.According to present knowledge, it ought to become heated...

30 21. I UTNCSN, DALZELL, AND WILLIAMS ON A FULL-SCALE L. E. Hunter, `` Foundations for Highways." Highus., Bridges and Aerodr., vol. 13, p. 14 (19 March, 1947). 22. Abhandlungen iiber Bodenmechanik und Grundbau" (" Papers on Soil Mechanics ForsclLGes. StTWes., p. 192. E. Schmidt, and Foundation Engineering"). Bielefeld, 1948. 23. A . R. Curtiss, " Blowing the Muck-Example and Str, vol...

dPPLICA4TION TO CONSTRUCTION OF AIRFIELD PAVEMENTS 487 Discussion NIF G. S. Cooper, referring to theuse of soil stabilization for permanent airfields, observed that most of the pavementsconstructed during the 1 9 3 9 4 5 war had, for a large number of reasons, been constructed in concrete. There had since been little new construction until comparatively recently, andthen construction had consisted in eitherstrengthening existing pavements for aircraft of normal weight or constructing new pavements for heavy aircraft. Most of the sites for heavy aircraft had subgrades with extremely low California Bearing Ratios (of the order of 3 per cent) and those sites on about 4 feet construction thickness would have been required if flexible pavements were to be used...

FRAMES DESIGNED ON PLASTIC THEORY 835 reasonable explanation for non-return to zero of the deflexions, but alao this could the well be due to high initial stresses inframes or roof, or to the behaviour of the foundations. A reversal of the direction of any asymmetry between frames 2, 3 and 6 6 , due to theframes, secondary members, roofing,or foundations would explain the discrepancies betweenthe corresponding lateral deflexions of the first and second cycles. Finally, two main conclusions may be made, namely :l . Owing to the effect of s e c o n d q members, bracing, cladding, and roofing materials there is considerable interaction between adjacent h m e s ...