000012901 001__ 12901
000012901 005__ 20160920162654.0
000012901 04107 $$aeng
000012901 046__ $$k2016-09-05
000012901 100__ $$aFierenkothen, C.
000012901 24500 $$aNew findings concerning the spreading of fresh concrete in bored piles

000012901 24630 $$n6.$$pInsights and Innovations in Structural Engineering, Mechanics and Computation
000012901 260__ $$bTaylor and Francis Group, London, UK
000012901 506__ $$arestricted
000012901 520__ $$2eng$$aThe execution of bored piles can be challenging in terms of concrete placement. Insufficient concrete cover and entrapment of debris are commonly occurring defects. It is used to be assumed that poor workability of fresh concrete is the main reason. In order to better understand the physical flow processes se-veral laboratory tests with unreinforced and reinforced piles were conducted using coloured concrete. The study of vertical cross sections through the cured piles revealed the flow pattern. Additionally, the flow pattern was modelled in numerical simulations based upon Computational Fluid Dynamics (CFD). For unreinforced piles the numerical simulations show—in good accordance with the physical experiments—that the fresh concrete rises approximately uniformly over the full cross section. In contrast, the reinforced piles reveal a deviant flow behaviour with a shell-shaped structure around the tremie pipe. Hence a new insight is gained about the spreading of fresh concrete in bored piles.

000012901 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000012901 653__ $$a

000012901 7112_ $$aSixth International Conference on Structural Engineering, Mechanics and Computation$$cCape Town, South Africa$$d2016-09-05 / 2016-09-07$$gSEMC2016
000012901 720__ $$aFierenkothen, C.$$iPulsfort, M.
000012901 8560_ $$ffischerc@itam.cas.cz
000012901 8564_ $$s1152313$$uhttp://invenio.itam.cas.cz/record/12901/files/349.pdf$$yOriginal version of the author's contribution as presented on CD, 349.pdf.
000012901 962__ $$r12552
000012901 980__ $$aPAPER