Scholarly record
APPLICATION OF CONTINUOUS DEEP DRAINAGE RIBS AND COMBINED DRAINAGE FACILITIES FOR LANDSLIDES AND STEEP SLOPE STABILIZATION
Abstract
Bulgaria is characterized by a high level of landslide activity and erosion-abrasion processes. The main factors affecting slope stability often include rising groundwater levels, river erosion, abrasion, flash floods, and surface runoff. Traditional horizontal or vertical drainage systems may take months or even years to become fully effective. To expand drainage options for steep slopes and accelerate the dewatering process, this paper reviews current drainage practices and surface runoff management at two sites in Bulgaria-Site 1 (Varna) and Site 2 (Sevlievo). Each site presents distinct geological and hydrological conditions and demonstrates different drainage system implementations. Particular attention is given to structures composed of secant vertical boreholes filled with drainage material. From a drainage perspective, these systems can be classified as -drainage trenches,- -drainage curtains,- -deep drainage ribs,- -drainage buttress ribs,- or -drainage buttresses (-perons).- Currently, national standards do not provide specific design guidelines for deep drainage ribs and define their sizing as -experimental- during the initial construction period. The paper discusses the design approach used at each site. The implemented dewatering measures have effectively improved slope stability, and all affected infrastructure remains operational. By comparing site conditions and applied techniques, the study offers practical guidance for engineers and planners working with deep and combined drainage systems in similar geotechnical contexts. Recommendations are also made for advancing design standards and improving monitoring during and after construction.
Publication Impact Profile
Publication details
References12
Kuriakose S., et al., Pore Water Pressure as a Trigger of Shallow Landslides in the Western Ghats of Kerala, India: Some Preliminary Observations from an Experimental Catchment, Physical Geography, UK, vol. 29, pp. 374�386, 2008. DOI: 10.2747/0272-3646.29.4.374
Wang G., Sassa K., On the Pore-pressure Generation and Movement of Rainfall-induced Landslides in Laboratory Flume Tests, Progress in Landslide Science, Germany, 2007. DOI: 10.1007/978-3-540-70965-7_12
Valore C., et al., An Experimental Investigation into the Permeability and Filter Properties of Pervious Concrete for Deep Draining Trenches, Environmental Engineering (Vol. 3), pp. 1�12, 2018. DOI: 10.19199/2018.3.0557
Cotecchia F., Lollino P., Petti R., Efficacy of Drainage Trenches to Stabilise Deep Slow Landslides in Clay Slopes, G�otechnique Letters, UK, vol. 6, pp. 117�124, 2016. DOI: 10.1680/jgele.15.00065
Carastoian D., Botu N., Landslide Treatment Using Deep Drainage Systems, Reinforced Soil Structure, and Pile Driving System, Proc. Conf. on Landslide Remediation, Romania, 2007.
Ivanov P., Dobrev N., Berov B., Frantzova A., Krastanov M., Nankin R., Landslide Risk for the Territory of Bulgaria by Administrative Districts, Geologica Balcanica, Bulgaria, vol. 51, pp. 21�28, 2022. DOI: 10.52321/GeolBalc.51.3.21
Frangov G., Petkova V., Stoyanov V., Kadiyski M., Kostov V., Papaliangas T., Landslide Risk Assessment and Mitigation Along a Road in SW Bulgaria, Fresenius Environmental Bulletin, Germany, vol. 26, pp. 244�253, 2017.
D�Acunto B., Urciuoli G., Groundwater Regime in a Slope Stabilized by Drain Trenches, Mathematical and Computer Modelling, UK, vol. 43, pp. 754�765, 2006. DOI: 10.1016/j.mcm.2005.02.013
Alan Turing Institute, Data Study Group Final Report: Network Rail, Alan Turing Institute Technical Report, UK, 2021.
Price S.L., Fitch N.R., Counterfort Drains � Design, Installation, and Long-term Performance in Soils of Greater Auckland, NZGS Geotechnical Symposium, New Zealand, 2017.
Bozhinova-Haapanen A., Stabilizing the Landslide on Road E87 Burgas � Malko Tarnovo, Bulgaria, Procedia Engineering, Netherlands, vol. 143, pp. 650�657, 2016. DOI: 10.1016/j.proeng.2016.06.092
Bozhinov B., Popov S., Bogdanova S., Yanakieva M., Ukrepitelni i Otvodnitelni Raboti pri Izpylnenieto na Obekt Sofia South Ring Mall, GeoZONE, Bulgaria, pp. 15�23, 2013. ISSN: 1314-8001
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.