DBPapers
DOI: 10.5593/SGEM2014/B12/S2.058

HIGHWAY DAMAGES IN VIETNAM DUE TO GEOTECHNICAL CAUSES AND TECHNICAL SOLUTIONS TO AVOID THEM

G. Nguyen
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-08-7 / ISSN 1314-2704, June 19-25, 2014, Book 1, Vol. 2, 457-464 pp

ABSTRACT
The paper deals with damages of highway section Ho Chi Minh City - Trung Luong in South Vietnam due to geotechnical causes. Main damages are located in places next to culverts and bridges abutments which are founded on piles while embankments next to them are founded on soft soils. The reasons of highway damages are not only complicated engineering-geological conditions (soft soils with big and variable thickness) but also not taking into account influence of pavement load and traffic load on deformation of soft soils. It is shown, that higher values of allowable settlement (residual settlement) up to 30cm for the highway with speed 120km/h enable quick and cheap highway construction but such practice not only requires more means for highway maintenance and operation but also has bad impact on transport safety. The paper also introduces the temporary regulations of the Ministry of Transport of Vietnam on technical solution for transition section between road and bridges (culverts), by application of which damages should be avoided.

Keywords: embankment, soft soils, residual settlement, prefabricated vertical drain, sand drain.