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dc.contributor.author Mampitiyaarachchi, CT
dc.contributor.author Ranathunga, RMIGNK
dc.contributor.author Rifad, MZM
dc.contributor.author Thathkalana, UMC
dc.contributor.author Abeysinghe, AMKB
dc.contributor.author Indrathilaka, HML
dc.contributor.author Premasiri, HMR
dc.contributor.author Weerawamakula, S
dc.contributor.editor Hemalal, PVA
dc.date.accessioned 2022-07-26T05:49:40Z
dc.date.available 2022-07-26T05:49:40Z
dc.date.issued 2015
dc.identifier.citation Mampitiyaarachchi, C.T., Ranathunga, R.M.I.G.N.K., Rifad, M.Z.M., Thathkalana, U.M.C., Abeysinghe, A.M.K.B., Indrathilaka, H.M.L., Premasiri, H.M.R., & Weerawamakula, S. (2015). An alternative mitigation method for Gerandi-Ella reactivated landslide. In P.V.A. Hemalal (Ed.), Proceedings of the 9th Annual ERE Research Conference on Earth Resources Management (pp. 39-49). Department of Earth Resources Engineering, University of Moratuwa. en_US
dc.identifier.uri http://dl.lib.uom.lk/handle/123/18458
dc.description.abstract Gerandi-Ella, a former landslide area is currently under threat of reactivation. National Building Research Organization has implemented a surface and vertical well drainage system to stabilize it. However, vertical drainage system has failed,and an unexpected behavior of groundwater was observed due to presence of clay layers in the colluvium. An effective and economical alternative mitigation method is required to stabilize the area. A particular portion of the site,positioned such that it keeps the rest of the landslide mass intact, was chosen as the study area. Implementing a proper alternative mitigation methodto the study area may help to stabilize the landslide along with existing surface drainage system.Piezometric levels at two boreholes and rainfall data at the study area were analyzed. Stability analysis through the software SLOPE/W gave the current factor of safety as 0.965. A horizontal drain network with suitable design parameters was proposed to achieve a factor of safety of 1.206 by considering the effect of the matrix suction. A series of sand and gravel filled vertical holes capped with 100 cm clay layer are also proposed to expedite the water drawdown through impervious strata to horizontal drains. en_US
dc.language.iso en en_US
dc.publisher Department of Earth Resources Engineering en_US
dc.subject Gerandi Ella en_US
dc.subject Landslides en_US
dc.subject Stability analysis en_US
dc.subject Matrix suction en_US
dc.subject Horizontal drainage en_US
dc.title An alternative mitigation method for Gerandi-Ella reactivated landslide en_US
dc.type Conference-Full-text en_US
dc.identifier.faculty Engineering en_US
dc.identifier.department Department of Earth Resources Engineering en_US
dc.identifier.year 2015 en_US
dc.identifier.conference 9th Annual ERE Research Conference on Earth Resources Management en_US
dc.identifier.place Katubedda en_US
dc.identifier.pgnos pp. 39-49 en_US
dc.identifier.proceeding Proceedings of the 9th Annual ERE Research Conference on Earth Resources Management en_US
dc.identifier.email amkh@uorn.lk en_US


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