SVIBOR - Project code: 2-11-292

MINISTRY OF SCIENCE AND TECHNOLOGY

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Project code: 2-11-292


THE STRUCTURE-FLYSCH SLOPE INTERACTION UNDER STATIC AND SEISMIC CONDITIONS


Main researcher: JAŠAREVIĆ, IBRAHIM (18195)



Assistants
Type of research: applied
Duration from: 01/01/91. to 12/15/94.

Papers on project (total): 17
Institution name: Građevinski fakultet, Zagreb (82)
Department/Institute: Department of Geotechnics
Address: Kačićeva 26, 41000 Zagreb
City: 10000 - Zagreb, Croatia
Communication
Phone: 385 (0)41 442 600 /326

Summary: In this scientific programme, on the basis of earlier researches and conclusions regarding flysch layers, a new element for analysis - "structure on the skope", is introduced. By such a general treating the structure together with the geotechnical media more economic solution can be achived. Basic characteristics of the flysch are: great biological heteragonity and anyzotropy due to frequent vertical changes various biological elements, even in direction at the sedimentation. Therefore, the flysch formations are very specific and its general characteristics differ, in a great extent, in relation to the characteristics at particular elements. The following researches were made: * Elaboration of an integral engineering-geological model (IIGM), by which it is possible to integrate all single IG profiles in a logical whole, representative for specific area. * Elaboration of a geotechnical model (GM) by which rock mass to similar geotechnical characteristic zones can be devided (on the basis at Q and RMR classifications). * Elaboration of a mathematical model (RM), separated from GM, by which stresses, straines and stability in static and seizmic conditions for critical stages of constructions. By this solutions, interaction between the objects and geotechnical media can be introduced in calculations. Detailed calculations with corresponding analyses for tunnels, anchored supporting structures and foundations is made.

Keywords: flysch slope, integral engineering geological model, geotechnical model, mathematical model, interaction structure-flysch rock mass

Research goals: The basic aim of the research is a synthesis and scientific interpretation of the results regarding flysch complex, especially problem of interaction object - flysch layers in static, as well in seismic conditions. Seismic conditions in most cases were not taken in consideration till now. By means of laboratory and "in situ" geotechnical testings and statistical analysis of the results, several correlations between mineralogic and petrography composition and geotechnical properties of the flysch were established. It was found mechanical behaviour of the flysch to be very complicated, the main reason beeing its heterogenity. The importance of the researches is evaluation possibility of the parameters necessary to form calculation models with object - flysch slope interaction included. Calculations and analyses of tunnels, anchored retaining walls and foundations of complex structures using computer programme Z-SOIL (finite element method) and programme FLAC (finite difference method) indicate the possibility of getting essentially better design solutions then it was possible before, especially when critical construction phases are considered.

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Last update: 10/20/95
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