SVIBOR - Project code: 2-11-075

MINISTRY OF SCIENCE AND TECHNOLOGY

Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69
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Project code: 2-11-075

ASSEMBLED ANCHORED RETAINING WALLS

Main researcher: JAŠAREVIĆ, IBRAHIM (18195)

Assistants

SRKOČ, MILJENKO (44352)
VRKLJAN, IVAN (93393)

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) 1 442 600 (326)

Summary: In the research project projected and build high classic concreteand reinforced concrete retaining walls are analysed and comparedwith bolted plain concrete structures 12 meters high. Newtechnology solution for protection of high rock slopes is basedon a usage of rock bolting with steel bar anchors in combinationwith a layer of micro reinforced shotcrete MRS for rock surfaceprotection. In the research project theoretical alghorithm is analysed,calculation of safety factors, state of stresses anddeformations, with design of parts of protection structure forone special sample. Static analysis is performed by programZ-SOIL (Finite element method) and by program FLAC ( method offinite diferences). Economy is proved on the real protection structure (Two timescheapper than classical retaining structures). Detailedlaboratory and "in situ" testing is performed on geotechnicalbolts and micro reinforced shotcrete with polypropilen fibres.

Keywords: rock slope, weathered rock stabilisation, rock mass classification, anchoring, microreinforced concrete, polypropulene fibers, retaining structures

Research goals: Main aim of this research is scientific analysis of the whole scope enabling involment of new type of retaining structures (Soil nailed) in the civil engineering practice and with this achievement of significant reduction of expencies. This type of retaining structures is not yet build or scientifically analysed in our country, so it is necesary to solve and research specific problems of geotechnical modeling of such structures for solution of stresses and deformations and stability of the whole system: rock massive and geotehnical bolts. Theoretical analysis and calculation has proved ability of usage this new technology solution. For one 30 metres high rock slopes conzist of mainly layered limestones hardly tectonicaly jointed a geotechnical model is done. With program Z-SOIL stresses and deformations are analysed with rock slopes stability. Protection structure is 600 kN rock bolts with 15 cm thick micro reinforced shotcrete. With laboratory testing of MRS and with "in situ" testing on pressure pilows ultimate bending capacity of shotcrete layer is defined.

Other information about the project.


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Last update: 10/19/95
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