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 |