000202027 001__ 202027
000202027 005__ 20190812205808.0
000202027 020__ $$a978-1-138-02674-2
000202027 0247_ $$2doi$$a10.1201/b17133-276
000202027 037__ $$aCONF
000202027 245__ $$aEffect of compressed riprap thickness on the stability of river banks
000202027 269__ $$a2014
000202027 260__ $$bCRC Press/Balkema$$c2014$$aLeiden
000202027 336__ $$aConference Papers
000202027 500__ $$a[990]
000202027 520__ $$aOne of the common measures for river bank protection is the installation of riprap. There are several methods to design riprap appropriately, which are however generally limited to dumped medium size blocks. Nevertheless, an additional resistance against erosion can be achieved by individually placing blocks in one or several layers instead of dumping them arbitrarily. An experimental investigation has thus been performed to study the stability of large blocks which are compressed as a river bank protection. Tests were carried out including one layer of stones as well as two layers, to evaluate the influence of the riprap layering (e.g. riprap thickness) on the bank stability. The effect of the thickness on the stability of ripraps is investigated in a 10 m long and 1.2 m wide tilting flume, with a rough fixed bed. Riprap median particle size was D50 = 37 mm. Testing was conducted for channel longitudinal slopes 0.015 and 0.030 and riprap bank inclinations of 27, 31 and 35 degrees. The riprap was installed on the top of a wide grain size distribution filter. Supercritical flow conditions were considered, given the steep channel slope. The complete removal of the riprap in a section under a constant discharge was defined as the failure criterion. The riprap failure threshold discharge was determined based on the series of tests with duration of maximum 180 minutes. In each test, riprap transport rate was measured every minute while the stones were tracked by a video camera and collected in a sediment trap at the channel end. The time of total failure was defined by standard video-image processing techniques. A time based analysis of failure was performed and first results revealed that, for similar conditions, the second layer stabilizes the riprap significantly and delays the time for total failure. Nonetheless, transport rate was found to be increased in this latter situation.
000202027 6531_ $$aBank erosion
000202027 6531_ $$aBank porection
000202027 6531_ $$aRiprap
000202027 6531_ $$aFailure mechanism
000202027 700__ $$0245349$$g200135$$aJafarnejad Chaghooshi, Mona
000202027 700__ $$aFranca, Mário J.
000202027 700__ $$0244418$$g202221$$aPfister, Michael
000202027 700__ $$0241228$$g112841$$aSchleiss, Anton
000202027 7112_ $$dSeptember, 3-5, 2014$$cLausanne, Switzerland$$aRiver Flow 2014
000202027 720_1 $$aSchleiss, Anton$$eed.$$g112841$$0241228
000202027 720_1 $$aDe Cesare, Giovanni$$eed.$$g101010$$0240404
000202027 720_1 $$aFranca, Mário J.$$eed.$$g151418$$0246576
000202027 720_1 $$aPfister, Michael$$eed.$$g202221$$0244418
000202027 773__ $$tProceedings of River Flow 2014$$kPaper 257$$q2069-2074
000202027 8564_ $$zn/a$$yn/a$$uhttps://infoscience.epfl.ch/record/202027/files/2014-990%20Effect%20of%20compressed%20riprap%20thickness%20on%20the%20stability%20of%20river%20banks.pdf$$s279630
000202027 909C0 $$xU10263$$pLCH$$0252079
000202027 909C0 $$0255473$$xU10263$$pPL-LCH
000202027 909CO $$qGLOBAL_SET$$pconf$$pENAC$$ooai:infoscience.tind.io:202027
000202027 917Z8 $$x246105
000202027 917Z8 $$x202221
000202027 937__ $$aEPFL-CONF-202027
000202027 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000202027 980__ $$aCONF