74A
793266 CODE OF PRACTICE FfR SAFETY PRECAUTIONS IN THE CONSV/3RUCTION OF I2LRGE DIAMETER B O R ~ S FOR PILING AND ~ H/RPOSES British Stsmdards Institution British Standard BS 5573: 1978, 30 June 1978,
7P Relates to the construction of bureholes of or exceedimg 0.75m diameter. Recommendations are included for site investigation, precautions during construction~ equipmentj amd ventilation.
Geophysical techniques See
also: 793070
793267 STUDY OF UNDERGROUND STRUCTURAL STABILITY USING NEAR-SURFACE AND DOWN-HC~uE MICROSEISMIC TECHNIQUES Hardy, H R; Mcwrey, G L Proc International Symposium on Field Measuremerits in Rock Mechanics, Zurich, 4-6 April 1977, V1, P75-92. Publ Rotterdam: A A Balkema, 1977 793268 IN-SITU DETERMINATION OF SOIL A~D ROCK PROPERTIES USING SEISMIC METHODS Pandian, N S; RaJu, A A Proc 5th Southeast Asian Conference on Soll Engineering, Bargkok, 2-4 July 1977, P297-
3o4 Describes the background to and principles of the method, and presents the results of field tests which were supplemented by drilling, plate load tests2 pressuremeter tests~ in-situ dynamic tests and also by lab tests.
793269 TECHNIQUES FOR IN SITU M E A ~ N T
OF SHEAR WAVE VELOCITY Rodrlgues, L F Nat Civil Engng Lab Portugal, Memo E%94 , 1978, 18P This paper was presented at the 3rd International Congress of Engineering Geology in Madrid, Sept 1978. It describes the dcwrhole and crosshole methods for S wave velocity measurement and reports their use at two sites in Portugal.
Presentation and interpretation of data 793270 SEIS4IC REFRACTION SURVEYING IN SOILS WITH VARIABLE PROPAGATION VELOCITY sorianos ;G Erizek, R J; Franklin~ A G Soils Found, VI7, N2, June 1977, Pl-15 Presents a method for the armlysis stud interpretation of data obtained from complex layered media. A computer is used to develop a series of charts from which soil characteristics are determined. 793271 ROCK ~EFORMABILITY MEASURED IN SITU. PROBLEMS AND SOLUTIONS Heuze, F E; Salem, A Proc International Symposium on Field Measuremerits in Rock Mechanics, Zurich, 4-6 April 1977, ~rl, P375-387. Publ Rotterdam: A A Balkema, 1977
An exam~nstion of plate-bearimg tests and borehole Jack tests by finite element analysis to determine critical parameters. 793272 ~ JACK TEST AND DETER~IN~ION OF MECHANICAL CHARACTERISTICS Bonvallet, J; DeJean, M Proc International Symposi~n on Field Measuremerits in Rock Mechanics, Zurich, 4-6 April 1977, V2, P361-374. Pt~l ROtterdam: A A Balkema, 1977 A finite element model is developed to resolve problems of interpretation of results from the flat Jack teat. The method has been extemded to determine deformation modulus and an intrinsic parameter of the rock material at breaking point. The results presented relate to tests carried out in shallow slots by sawing. JACK TESTS AND Fl~WID 793273 INfERPRETATION OF ~ MEASt~R~24ENTS IN TUNNELS BY MEANS OF FINITE ELEMENT ANALYSIS Wittke s W Proc International SymposiL~n on Field Measuremerits in Rock Mechanics, Zurich, 4-6 Al~il 1977, V2, P997-1018. Publ Rotterdam: A A Balkema, 1977 Two projects are discussed: i) the foymdation in Jointed clay slate for an arch gravity dsmj ard 2) the construction of a turmel in swelling rock (Stuttgart underground) where deformation parameters were required to design an internal lining.
Subjects Peripheral to Geomechanics Concrete technology 793274 BEHAVIOUR OF PLAIN CONCRETE SUBJECT TO BIAXIAL STRESS TasuJl, M E Ph D thesis, Ccrnell Univ, 1976 , 181P Strength and deformatiomal characteristics were studied experimentally and the failure mechanism considered both at ultimate load and at the discontinuity level. A complete blaxial stress envelope is presented and a stress-strain relationship proposed. Avail: University Microfilms Ltd, 18 Bedford Row, London, WCIR 4EJ, UK
793275 HORIZONTAL SLIPFO~ CONSTRUCTION WITH LOW SLUMP CONCRETE Hsia, F T Ph D thesis, Michigan State Univ, 1977, 234P Physical and mechanical properties of low slump concrete were investigated in the fresh state (includimg yield stress, ultimate strength, elastic and plastic moduli)j and the behaviour of constructions examined by the finite element method. Structures made by this technique may be