. . "2"^^ . . . "http://www.isvav.cz/projectDetail.do?rowId=GA103/04/1134"^^ . "0"^^ . . "Foundation slabs below the ground-water table"@en . . . . . "Grantov\u00FD \u00FAkol se zab\u00FDval \u0159e\u0161en\u00EDm z\u00E1kladov\u00FDch desek v hlubok\u00FDch jam\u00E1ch. Jedn\u00E1 se o desky velk\u00FDch tlou\u0161t\u011Bk, u kter\u00FDch se vzhledem k hydrata\u010Dn\u00EDm tepl\u016Fm a smr\u0161\u0165ov\u00E1n\u00ED mus\u00ED v prv\u00E9 \u0159ad\u011B \u0159e\u0161it ot\u00E1zka postupn\u00E9 beton\u00E1\u017Ee. A to jednak v horizont\u00E1ln\u00EDch bloc\u00EDch, jedna"@cs . . "GA103/04/1134" . . . "Z\u00E1kladov\u00E9 desky pod hladinou podzemn\u00ED vody" . . . . "Neuvedeno."@en . . . . "Foundation slabs supported by piles, and diaphragm walls, both made in deep ditches under the presence of highly elevated ground water level are often impaired by cracks, which finally make it possible for the liquid water to penetrate through these structural elements. Mechanisms of their deterioration followed by leaching are so far not exactly known. It is therefore necessary: a) to analyze the subsoil-upper structure interaction in two regimes: In regime I, when the upper structure is under progress, the ground water is pumped from the ditch, so that the water level reaches only the lower face of the foundation slab. When the structure attains a certain height, the pumping is stopped and the ground water is allowed to reach its natural level, regime II; b) to verify the effect of the concrete placing technology on the behavior of foundation slabs and diaphragm walls; c) to curry out a study of the initiation and growth of cracks trough the thickness of the slab when maturing. Solution"@en . "The project was focused on testing and numerical modeling of foundation slabs bellow the ground water table. The thickness of such slabs is very high where a significant role plays hydration and shrinkage. The process of concrete layout is therefore very"@en . "Z\u00E1kladov\u00E9 desky podep\u0159en\u00E9 pilotami a podzemn\u00ED st\u011Bny ve stavebn\u00EDch jam\u00E1ch hluboko pod hladinou podzemn\u00ED vody jsou \u010Dasto po\u0161kozeny trhlinami, kter\u00E9 umo\u017E\u0148uj\u00ED podzemn\u00ED vod\u011B pronikat skrz tyto stavebn\u00ED prvky. Mechanizmy jejich po\u0161kozov\u00E1n\u00ED pr\u016Fsakem nejsou doposud p\u0159esn\u011B zn\u00E1m\u00E9. Proto je nutno: a) analyzovat interakci mezi deskou a podlo\u017E\u00EDm ve dvou re\u017Eimech: V re\u017Eimu I, kdy vrchn\u00ED konstrukce se stav\u00ED a voda je \u010Derp\u00E1na tak, aby hladina podzemn\u00ED vody dos\u00E1hla pouze ke spodn\u00EDmu okraji desky. V re\u017Eimu II, pot\u00E9 co stavba nabude ur\u010Dit\u00E9 v\u00FD\u0161ky, studn\u011B se zav\u0159ou a voda dos\u00E1hne sv\u00E9 p\u0159irozen\u00E9 hladiny. Pozornost bude v\u011Bnov\u00E1na t\u00E9\u017E vlivu povodn\u00ED na chov\u00E1n\u00ED stavby; b) ov\u011B\u0159it vliv technologie beton\u00E1\u017Ee na chov\u00E1n\u00ED z\u00E1kladov\u00FDch desek a podzemn\u00EDch st\u011Bn; c) prozkoumat iniciaci a r\u016Fst trhlin po tlou\u0161\u0165ce z\u00E1kladov\u00E9 desky p\u0159i zr\u00E1n\u00ED betonu. \u0158e\u0161en\u00ED v\u00FD\u0161e popsan\u00E9ho probl\u00E9mu vy\u017Eaduje, aby dlouhodob\u00E9 deformace desky a podz\u00E1klad\u00ED byly v\u011Brohodn\u011B pops\u00E1ny. K tomuto \u00FA\u010Delu budou pou\u017Eity jednak vlastn\u00ED neline\u00E1rn\u00ED materi\u00E1lov\u00E9 modely a programy," . "1"^^ . "2007-10-16+02:00"^^ . . . "2"^^ . "0"^^ .