- Email: [email protected]
Under cover
SURFACE STRUCl-URES:CONSTRUCTION
23lA
955278
sufficient barrier alone. Addition of a flexible liner in a closure cover may pose a risk to stability, particularly in seismic regions. (J.M.McLaughlin)
The evaluation of a lignite strip coal mine at Yatagan in Southwest Turkey has provided an opportunity to combine both qualitative and quantitative factors in highwall design. In this paper an attempt has been made to illustrate an instability problem that occurred in a highwall externally loaded by a spoil pile in the southern part of the pit. The progressive failure developed through a combination of sliding along structural discontinuities and failure through the moderate quality, low strength rock mass. In addition, the calculated slip surfaces match the actual slip surfaces, and the non-linear shear strength failure criterion confirmed that the mobilized shear strength appears realistic for design purposes. (from Authors)
Earth retaining structures
Assessment of the failure mechanism of a bighwall slope under spoil pile loadings at a coal mine R. Ulusay & H. Aksoy, Engineering Geology, 38(1-2), 1994, pp 117-134.
955279 Investigation of failure of highway embankment founded on colluvium and suggested stabilization measures for reconstruction A. S. Al-Homoud, S. K. Saket L A. I. Husein, Engineering Geology, 38(1-2), 1994, pp 95-116. The landslide at km 38 + 600 along the Irbid-Amman Highway in Jordan was the result of foundation instability during the exceptionally heavy rainfall season of 1991/1992. The area of the landslide is approximately 42 000 m2 carrying an estimated volume of 500 000 m3. This paper summarizes the detailed geotechnical investigation carried out at the site to identify the causes and mechanism of failure, and recommends remedial measures. (from Authors) 955280 Assessment of risk from rockfall from active and abandoned quarry slopes M. E. Robotham, H. Wang & G. Walton, Transactions Institution of Mining & Metallurgy, Section A, 104(JanApril), 1995, pp A25-A33. Rockfall is a significant hazard in quarries. An account is given of the findings of recent assessments of the risk from rockfall from faces in working and abandoned quarries using computer simulation techniques. Methods of calibrating the rockfall models based on field experiments to determine coefficients of restitution and thereby assess critical bounce heights and roll distances are also discussed. (Authors) 955231 The effect of normal stress-friction angle relationship on tbe stability analysis of a rockflll dam B. Indraratna, Geotechnical & Geological Engineering, 12(2), 1994, pp 113-121. Accurate stability analysis must consider the variation of the angle of friction of rocktill with the confining pressure. This paper compares the constant friction angle approach with the variable friction angle method based on the stability analysis of a large rockfill dam, and the associated practical implications are discussed. In the latter analysis, the effect of normal stress on the friction angle of rocktill is incorporated through experimental observations (from Author) 955282 Under cover N. Duplancic, 70-71.
Civil Engineering - ASCE,
64(12), 1994, pp
Discusses stability problems in the use of flexible membrane liners for landfill closure cover systems. Interface stability is analysed for synthetic versus clay systems for a variety of slopes. It is suggested that slip resistant clay provides a
RMMS
12 5-t,,
955283
Design and construction of the diaphragm wall C. Howden & J. D. Crawley, Proceedings - ICE: Civil Engineering, 108(Special Issue l), 1995, pp 48-52. Nuclear Electric and Stent-Soletanche employed a novel combination of excavation method and use of plastic concrete in the construction of the foundations for Sixewell B Power Station. The result was a record-breaking diaphragm wall construction time. This paper describes the dewatering of the site, the evolution of the diaphragm wall and its design and construction. To achieve the accuracy required for the 56 m deep wall excavation was carried out using two reverse circulation trenching rigs. A spial plastic concrete was developed to form the 70 000 m cut-off. (Authors)
Construction methods 9552&4 Multlmedla communications in construction A. Thorpe, A. Baldwin, C. Carter, D. Leevers & D. Madigan, Proceedings - ICE: Civil Engineering, 108(l), 1995, pp 12-16. Using broadband technology to enhance construction communications is the subject of a major ELI-funded research programme. Early indications are that applications such as video conferencing, shared-screen computing and remote multimedia links on construction projects could have a significant impact on inter-professional wmmunications and informal exchanges of information. The findings of an initial study in the UK, in which the design and construction teams on a major power station project were linked via ISDN (Integrated Services Digital Network) lines are presented. (Authors) 955285
Going underground? t4N2tN, Water & Environment International, 4(32), 1995, pp - . Factors influencing the increasing use of trenchless technology for water, sewerage and gas installation and repair operations are examined. Reasons for the slow progress of the technology in the past are discussed. Findings of a recent CIRIA (Construction Industry Research and Information Association) study into the planning and investigation aspects of trenchless and minimum excavation technology are presented. (P.M.Taylor) 955286
Out of the trenches ANON, International Construction, 33(1 l), 1994, pp 70,74. Developments in the continued growth of trenchless technology are described. With the refinement of directional boring methods and advances in techniques, companies in Europe are expected to expand their use of the technology and spur industry growth, reflecting events in the USA. Advances in directional boring, pneumatic-power piercing, microtunnelling and earth augering methods and tools are described. (PMTaylor)
23lA
955278
sufficient barrier alone. Addition of a flexible liner in a closure cover may pose a risk to stability, particularly in seismic regions. (J.M.McLaughlin)
The evaluation of a lignite strip coal mine at Yatagan in Southwest Turkey has provided an opportunity to combine both qualitative and quantitative factors in highwall design. In this paper an attempt has been made to illustrate an instability problem that occurred in a highwall externally loaded by a spoil pile in the southern part of the pit. The progressive failure developed through a combination of sliding along structural discontinuities and failure through the moderate quality, low strength rock mass. In addition, the calculated slip surfaces match the actual slip surfaces, and the non-linear shear strength failure criterion confirmed that the mobilized shear strength appears realistic for design purposes. (from Authors)
Earth retaining structures
Assessment of the failure mechanism of a bighwall slope under spoil pile loadings at a coal mine R. Ulusay & H. Aksoy, Engineering Geology, 38(1-2), 1994, pp 117-134.
955279 Investigation of failure of highway embankment founded on colluvium and suggested stabilization measures for reconstruction A. S. Al-Homoud, S. K. Saket L A. I. Husein, Engineering Geology, 38(1-2), 1994, pp 95-116. The landslide at km 38 + 600 along the Irbid-Amman Highway in Jordan was the result of foundation instability during the exceptionally heavy rainfall season of 1991/1992. The area of the landslide is approximately 42 000 m2 carrying an estimated volume of 500 000 m3. This paper summarizes the detailed geotechnical investigation carried out at the site to identify the causes and mechanism of failure, and recommends remedial measures. (from Authors) 955280 Assessment of risk from rockfall from active and abandoned quarry slopes M. E. Robotham, H. Wang & G. Walton, Transactions Institution of Mining & Metallurgy, Section A, 104(JanApril), 1995, pp A25-A33. Rockfall is a significant hazard in quarries. An account is given of the findings of recent assessments of the risk from rockfall from faces in working and abandoned quarries using computer simulation techniques. Methods of calibrating the rockfall models based on field experiments to determine coefficients of restitution and thereby assess critical bounce heights and roll distances are also discussed. (Authors) 955231 The effect of normal stress-friction angle relationship on tbe stability analysis of a rockflll dam B. Indraratna, Geotechnical & Geological Engineering, 12(2), 1994, pp 113-121. Accurate stability analysis must consider the variation of the angle of friction of rocktill with the confining pressure. This paper compares the constant friction angle approach with the variable friction angle method based on the stability analysis of a large rockfill dam, and the associated practical implications are discussed. In the latter analysis, the effect of normal stress on the friction angle of rocktill is incorporated through experimental observations (from Author) 955282 Under cover N. Duplancic, 70-71.
Civil Engineering - ASCE,
64(12), 1994, pp
Discusses stability problems in the use of flexible membrane liners for landfill closure cover systems. Interface stability is analysed for synthetic versus clay systems for a variety of slopes. It is suggested that slip resistant clay provides a
RMMS
12 5-t,,
955283
Design and construction of the diaphragm wall C. Howden & J. D. Crawley, Proceedings - ICE: Civil Engineering, 108(Special Issue l), 1995, pp 48-52. Nuclear Electric and Stent-Soletanche employed a novel combination of excavation method and use of plastic concrete in the construction of the foundations for Sixewell B Power Station. The result was a record-breaking diaphragm wall construction time. This paper describes the dewatering of the site, the evolution of the diaphragm wall and its design and construction. To achieve the accuracy required for the 56 m deep wall excavation was carried out using two reverse circulation trenching rigs. A spial plastic concrete was developed to form the 70 000 m cut-off. (Authors)
Construction methods 9552&4 Multlmedla communications in construction A. Thorpe, A. Baldwin, C. Carter, D. Leevers & D. Madigan, Proceedings - ICE: Civil Engineering, 108(l), 1995, pp 12-16. Using broadband technology to enhance construction communications is the subject of a major ELI-funded research programme. Early indications are that applications such as video conferencing, shared-screen computing and remote multimedia links on construction projects could have a significant impact on inter-professional wmmunications and informal exchanges of information. The findings of an initial study in the UK, in which the design and construction teams on a major power station project were linked via ISDN (Integrated Services Digital Network) lines are presented. (Authors) 955285
Going underground? t4N2tN, Water & Environment International, 4(32), 1995, pp - . Factors influencing the increasing use of trenchless technology for water, sewerage and gas installation and repair operations are examined. Reasons for the slow progress of the technology in the past are discussed. Findings of a recent CIRIA (Construction Industry Research and Information Association) study into the planning and investigation aspects of trenchless and minimum excavation technology are presented. (P.M.Taylor) 955286
Out of the trenches ANON, International Construction, 33(1 l), 1994, pp 70,74. Developments in the continued growth of trenchless technology are described. With the refinement of directional boring methods and advances in techniques, companies in Europe are expected to expand their use of the technology and spur industry growth, reflecting events in the USA. Advances in directional boring, pneumatic-power piercing, microtunnelling and earth augering methods and tools are described. (PMTaylor)