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F. Tatsuoka¹, K. Watanabe², M. Tateyama² and M. Okamoto³

¹Department of Civil Engineering, Tokyo University of Science, Chiba Prefecture, Japan
²Structural Engineering Division, Railway Technical Research Institute, Tokyo, Japan
³RRR Association; c/o Integrated Geotechnology Institute (IGI) Ltd, Tokyo, Japan

Keywords: bridge abutment, geosynthetic-reinforced soil, GRS integral bridge, high-speed train, nail-reinforced soil, retaining wall, seismic design.

Summary

Various types of geosynthetic-reinforced soil (GRS) structure and nail-reinforced soil (NRS) structure were successfully constructed for railways, including highspeed train lines, for the last 25 years. They are: (1) GRS retaining walls (RWs) having staged-constructed full-height rigid (FHR) facing for a total length of 150 km; (2) GRS bridge abutments (more than 50), arranging a girder via a fixed bearing on the top of FHR facing of a GRS RW; (3) four GRS integral bridges with the girder structurally integrated to the top of FHR facings of a pair of GRS RW; (4) box culvert structures, passing under railways, integrated to adjacent geosynthetic-reinforced approach fills; (5) GRS tunnel entrance protections; and (6) RWs constructed by cutting existing ground with the use of large-diameter nails and a pre-installed diaphragm wall for a total length more than 17 km. They are now the standard soil structures employed in place of conventional type soil structures. They were also constructed to restore a number of railway embankments, RWs, bridge abutments and approach fills that collapsed by natural disasters and also to reinforce existing soil structures. NRS Integrated Bridge was developed to reinforce existing old conventional type bridges by reinforcing the approach fills with large-diameter nails and structurally integrating the girder to the top of a pair of abutments.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 104 PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 124 Recent Research and Practice of Soil-Reinforcing Technologies for Railways in Japan F. Tatsuoka¹, K. Watanabe², M. Tateyama² and M. Okamoto³ ¹Department of Civil Engineering, Tokyo University of Science, Chiba Prefecture, Japan ²Structural Engineering Division, Railway Technical Research Institute, Tokyo, Japan ³RRR Association; c/o Integrated Geotechnology Institute (IGI) Ltd, Tokyo, Japan doi:10.4203/ccp.104.124 purchase the full-text of this paper Full Bibliographic Reference for this paper F. Tatsuoka, K. Watanabe, M. Tateyama, M. Okamoto, "Recent Research and Practice of Soil-Reinforcing Technologies for Railways in Japan", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 124, 2014. doi:10.4203/ccp.104.124 Keywords: bridge abutment, geosynthetic-reinforced soil, GRS integral bridge, high-speed train, nail-reinforced soil, retaining wall, seismic design. Summary Various types of geosynthetic-reinforced soil (GRS) structure and nail-reinforced soil (NRS) structure were successfully constructed for railways, including highspeed train lines, for the last 25 years. They are: (1) GRS retaining walls (RWs) having staged-constructed full-height rigid (FHR) facing for a total length of 150 km; (2) GRS bridge abutments (more than 50), arranging a girder via a fixed bearing on the top of FHR facing of a GRS RW; (3) four GRS integral bridges with the girder structurally integrated to the top of FHR facings of a pair of GRS RW; (4) box culvert structures, passing under railways, integrated to adjacent geosynthetic-reinforced approach fills; (5) GRS tunnel entrance protections; and (6) RWs constructed by cutting existing ground with the use of large-diameter nails and a pre-installed diaphragm wall for a total length more than 17 km. They are now the standard soil structures employed in place of conventional type soil structures. They were also constructed to restore a number of railway embankments, RWs, bridge abutments and approach fills that collapsed by natural disasters and also to reinforce existing soil structures. NRS Integrated Bridge was developed to reinforce existing old conventional type bridges by reinforcing the approach fills with large-diameter nails and structurally integrating the girder to the top of a pair of abutments. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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