000004792 001__ 4792
000004792 005__ 20141119144553.0
000004792 04107 $$aeng
000004792 046__ $$k2002-06-02
000004792 100__ $$aSedki, Samia
000004792 24500 $$aTHE INSTABILITY ANALYSIS OF CHALK CLIFFS OF THE BLANC NEZ CAPE (PAS-DE-CALAIS AREA)

000004792 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004792 260__ $$bColumbia University in the City of New York
000004792 506__ $$arestricted
000004792 520__ $$2eng$$aThe chalk cliffs of the Blanc Nez Cape located in the littoral fringe of the northern France, and on front of the Dover cliffs (England), are the seat of natural phenomena of erosion and collapses of various sizes. Several collapses were observed at the site of Escalles, and have destabilized the top of cliff by opening cracks there. Following an observation campaigns, an instrumentation was installed to measure the cracks opening. With these same devices, vertical displacements were evaluated. On other hand, the observations carried out on ground reveal a relationship between the cracks at the surface and the depth fracturing which is of tectonic origin. Our current study aims to check the various relationships between the surface movements and deep dynamics. So the acquisition of site data will enable us to elaborate an adequate collapse model which will take account simultaneously of ground conditions supporting the movements. We will present in this paper, the first results of the surface follow up reveal that relationships might exist between the variation of water table level and the fractures movements and between the latter and the quantity of rainfall. These relationships enable us to utter some assumptions to explain collapse occurrences.

000004792 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004792 653__ $$a

000004792 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004792 720__ $$aSedki, Samia$$iBoulemia, Chérif$$iColbeaux, Jean Pierre$$iLaethem, Francis van$$iHenry, Eric$$iCarlier, Erick$$i.
000004792 8560_ $$ffischerc@itam.cas.cz
000004792 8564_ $$s792335$$uhttps://invenio.itam.cas.cz/record/4792/files/343.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004792 962__ $$r4594
000004792 980__ $$aPAPER