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000133658 0247_ $$2doi$$a10.1117/12.811964
000133658 037__ $$aCONF
000133658 245__ $$aSeepage and settlement monitoring for earth embankment dams using fully distributed sensing along optical fibers
000133658 260__ $$bSPIE$$c2008
000133658 269__ $$a2008
000133658 336__ $$aConference Papers
000133658 520__ $$aA method for seepage and settlement monitoring in earth embankment dams using fully distributed sensing along optical fibres is proposed. A model is developed for simulating and monitoring seepage and settlement systems. This model relates the strains and the temperature changes to the fiber Brillouin gain spectrum in the embankment dam embedding the optical fiber sensors. The model consists of two parts. Submodel 1 addresses the simulation of seepage inside the embankment dam. Submodel 2 relates the measurement of the fiber Brillouin gain spectrum to the changes in temperature and strain inside the embankment dam. Both the changes in temperature and strain during the process are used to reveal serious seepages and settlements occurring inside the embankment dam. The continuously decreasing temperature curve shows an abrupt dramatic increasing rate, which shows that the change is not caused by the temperature of the seepage water but the strain. In this paper, as an example, a model filled with the soil from Yellow River is built and bare optical fibers are embedded under different soil layers near the seepage path. The simulated seepage flows under various flow rates are monitored using the optical fibers and measured by a DiTeSt -STA202 distributed temperature and strain analyzer. A partial settlement within the embankment dam model is observed.
000133658 700__ $$aZhu, P. Y.
000133658 700__ $$aZhou, Y.
000133658 700__ $$0240503$$aThévenaz, Luc$$g106544
000133658 700__ $$aJiang, G. L.
000133658 7112_ $$a2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications$$cBeijing, China$$d2008
000133658 773__ $$jSPIE Proceedings 7160$$q716013$$t2008 International Conference on Optical Instruments and Technology
000133658 8564_ $$zURL
000133658 8564_ $$s324702$$uhttps://infoscience.epfl.ch/record/133658/files/Zhu-2008-Seepage%20and%20settleme.pdf$$yPublisher's version$$zn/a
000133658 909CO $$ooai:infoscience.tind.io:133658$$pconf$$pSTI
000133658 909C0 $$0252088$$pTHEVE$$xUS05033
000133658 909C0 $$0252591$$pSCI-STI-LT$$xU12146
000133658 917Z8 $$x106544
000133658 937__ $$aTHEVE-CONF-2009-001
000133658 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000133658 980__ $$aCONF