000078324 001__ 78324
000078324 005__ 20220831095643.0
000078324 0247_ $$2doi$$a10.1016/j.enggeo.2018.02.015
000078324 0248_ $$2sideral$$a105397
000078324 037__ $$aART-2018-105397
000078324 041__ $$aeng
000078324 100__ $$0(orcid)0000-0002-1460-1590$$aPueyo Anchuela, Ó.$$uUniversidad de Zaragoza
000078324 245__ $$aInternal characterization of embankment dams using ground penetrating radar (GPR) and thermographic analysis: A case study of the Medau Zirimilis Dam (Sardinia, Italy)
000078324 260__ $$c2018
000078324 5060_ $$aAccess copy available to the general public$$fUnrestricted
000078324 5203_ $$aThe stability of embankment dams without an impermeable core depends on the characteristics of the face slab that prevents internal erosion, piping and eventual collapse of the structure. Under a Mediterranean climate, the impermeable asphaltic face slab is subjected to high solar radiation and consequent temperature changes, which can generate the creation of cracks and joints. The Medau Zirimilis Dam, located in the Casteddu River (Sardinia), is an embankment dam that has undergone seepage and continuous repairs in its asphalt face slab. These reparations have been conducted because of the occurrence of cracks and relative movement of different segments of the slab. To evaluate if seepage endangers the integrity of the dam, GPR was used, with different antennas (100, 250 and 500 MHz), along its crest and upstream and downstream faces, and the data were integrated with infrared thermographic images. Although geophysical data do not show structural changes affecting the main dam structure, deformation structures at shallow levels and in particular in the upstream face and along the crest of the dam have been identified. Such deformation affects the road atop the crest, the face slab and underlying levels, resulting in landslides that include material from several meters below the surface. The analysis permitted the identification of the origin of surficial cracks and their effects on the face slab. These sectors, independent of current movement, define the most unstable areas against water level changes that can affect the dam integrity. GPR analysis at the embankments usually has the handicap of high clay content that precludes electromagnetic wave penetration; however, in this case, the obtained resolution and extent of penetration using the different antennas was sufficient, due to the absence of an inner waterproof unit, and permitted the evaluation of the inner structure of the dam and the application of GPR for construction quality surveillance, internal structural characterization and dam monitoring.
000078324 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E32-17R
000078324 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000078324 590__ $$a3.909$$b2018
000078324 591__ $$aGEOSCIENCES, MULTIDISCIPLINARY$$b30 / 195 = 0.154$$c2018$$dQ1$$eT1
000078324 591__ $$aENGINEERING, GEOLOGICAL$$b4 / 38 = 0.105$$c2018$$dQ1$$eT1
000078324 592__ $$a2.209$$b2018
000078324 593__ $$aGeotechnical Engineering and Engineering Geology$$c2018$$dQ1
000078324 593__ $$aGeology$$c2018$$dQ1
000078324 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000078324 700__ $$aFrongia, P.
000078324 700__ $$aDi Gregorio, F.
000078324 700__ $$0(orcid)0000-0003-3652-3527$$aCasas Sainz, A.M.$$uUniversidad de Zaragoza
000078324 700__ $$0(orcid)0000-0003-3197-4177$$aPocoví Juan, A.$$uUniversidad de Zaragoza
000078324 7102_ $$12000$$2655$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Paleontología
000078324 7102_ $$12000$$2428$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Geodinámica Interna
000078324 773__ $$g237 (2018), 129-139$$pEng. geol.$$tEngineering Geology$$x0013-7952
000078324 8564_ $$s636056$$uhttps://zaguan.unizar.es/record/78324/files/texto_completo.pdf$$yPostprint
000078324 8564_ $$s54972$$uhttps://zaguan.unizar.es/record/78324/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000078324 909CO $$ooai:zaguan.unizar.es:78324$$particulos$$pdriver
000078324 951__ $$a2022-08-31-09:48:20
000078324 980__ $$aARTICLE