000004794 001__ 4794
000004794 005__ 20141119144554.0
000004794 04107 $$aeng
000004794 046__ $$k2002-06-02
000004794 100__ $$aBortal-Nafaa, Sonia
000004794 24500 $$aMODELLING OF INJECTION OF FINE CEMENT GROUT : DISCRETE APPROACH

000004794 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004794 260__ $$bColumbia University in the City of New York
000004794 506__ $$arestricted
000004794 520__ $$2eng$$aInjection aims to improve the soil characteristics through consolidation and/or sealing. This paper presents a new groutability criterion dedicated to select the adequate size of cement to be injected in a given sand sample. It also deals with a numerical modeling of the injection by the Distinct Element Method, which represents an innovation in the matter. In fact, most of the numerical grouting models consider soil and grout as continuum media. However, as most of the grouts are of suspension type, the continuous approach generally presents difficulties by taking into account the particle retention witch presents the main reason of an injection failure. The new numerical model represents each soil and cement grain separately so that the void matrix of the sample as well as cement grains blocking in front of small passages are well taken into account. The injection process is expressed through drag forces applied by the suspension fluid on cement particles. The comparison of numerical results with experimental ones showed that the numerical discreet approach of grouting is quiet interesting. 

000004794 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004794 653__ $$a

000004794 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004794 720__ $$aBortal-Nafaa, Sonia$$iGouvenot, Daniel
000004794 8560_ $$ffischerc@itam.cas.cz
000004794 8564_ $$s505687$$uhttp://invenio.itam.cas.cz/record/4794/files/346.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004794 962__ $$r4594
000004794 980__ $$aPAPER