{"id":670,"date":"2026-02-12T13:43:48","date_gmt":"2026-02-12T11:43:48","guid":{"rendered":"https:\/\/www.sk-babickinerady.top\/?p=670"},"modified":"2026-02-12T13:43:48","modified_gmt":"2026-02-12T11:43:48","slug":"preco-maju-mosty-take-obrovske-medzery-dovod-je-sokujucejsi-nez-si-dokazete-predstavit","status":"publish","type":"post","link":"https:\/\/www.sk-babickinerady.top\/?p=670","title":{"rendered":"Pre\u010do maj\u00fa mosty tak\u00e9 obrovsk\u00e9 medzery? D\u00f4vod je \u0161okuj\u00facej\u0161\u00ed, ne\u017e si dok\u00e1\u017eete predstavi\u0165."},"content":{"rendered":"\n<p>Mo\u017eno to na prv\u00fd poh\u013ead vyzer\u00e1 ako chyba v projekte alebo zanedban\u00e1 \u00fadr\u017eba, ale tie \u201eobrovsk\u00e9 medzery\u201c (odborne naz\u00fdvan\u00e9 <strong>dilata\u010dn\u00e9 \u0161k\u00e1ry<\/strong>) s\u00fa v skuto\u010dnosti to jedin\u00e9, \u010do dr\u017e\u00ed mosty vcelku.<\/p>\n\n\n\n<p>D\u00f4vod nie je len technick\u00fd, je to fascinuj\u00faci s\u00faboj in\u017einierstva s ne\u00faprosn\u00fdmi z\u00e1konmi fyziky. Tu je vysvetlenie, pre\u010do s\u00fa tieto medzery ot\u00e1zkou \u017eivota a smrti mosta:<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">1. Mosty \u201ed\u00fdchaj\u00fa\u201c (Tepeln\u00e1 roz\u0165a\u017enos\u0165)<\/h3>\n\n\n\n<p>V\u00e4\u010d\u0161ina materi\u00e1lov, z ktor\u00fdch s\u00fa mosty postaven\u00e9 (oce\u013e a bet\u00f3n), sa spr\u00e1va ako \u017eiv\u00fd organizmus. Ke\u010f je v lete <strong>40 \u00b0C<\/strong>, materi\u00e1l sa roz\u0165ahuje. Ke\u010f v zime udrie <strong>-20 \u00b0C<\/strong>, materi\u00e1l sa zmr\u0161\u0165uje.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u0160okuj\u00faci fakt:<\/strong> Dlh\u00fd dia\u013eni\u010dn\u00fd most m\u00f4\u017ee po\u010das roka zmeni\u0165 svoju d\u013a\u017eku aj o <strong>nieko\u013eko desiatok centimetrov<\/strong>.<\/li>\n\n\n\n<li><strong>\u010co by sa stalo bez medzier?<\/strong> Ak by most nemal kam \u201er\u00e1s\u0165\u201c, obrovsk\u00fd tlak by sp\u00f4sobil, \u017ee by sa bet\u00f3n rozdrvil, oce\u013eov\u00e9 nosn\u00edky by sa ohli ako luk a cel\u00e1 kon\u0161trukcia by sa jednoducho roztrhla alebo zr\u00fatila.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. S\u00faboj s kinetickou energiou a vetrom<\/h3>\n\n\n\n<p>Most nie je statick\u00fd objekt. Ke\u010f po \u0148om prech\u00e1dzaj\u00fa desiatky kami\u00f3nov, kon\u0161trukcia sa mierne vln\u00ed a preh\u00fdba. Medzery umo\u017e\u0148uj\u00fa jednotliv\u00fdm \u010dastiam mosta h\u00fdba\u0165 sa nez\u00e1visle od seba. Bez nich by vibr\u00e1cie z dopravy a siln\u00e9ho vetra vytvorili v materi\u00e1li mikrotrhliny, ktor\u00e9 by viedli k n\u00e1hlemu kolapsu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Ochrana pred zemetrasen\u00edm<\/h3>\n\n\n\n<p>V seizmicky akt\u00edvnych oblastiach funguj\u00fa tieto medzery ako <strong>tlmi\u010de n\u00e1razov<\/strong>. Umo\u017e\u0148uj\u00fa mostn\u00fdm poliam \u201etancova\u0165\u201c bez toho, aby do seba narazili a rozbili sa na k\u00fasky.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83c\udf09 Pre\u010do tie medzery vyzeraj\u00fa ako \u201eoce\u013eov\u00e9 zuby\u201c?<\/h3>\n\n\n\n<p>V\u0161imli ste si, \u017ee tie medzery nie s\u00fa len pr\u00e1zdne diery, ale \u010dasto pripom\u00ednaj\u00fa do seba zapadaj\u00face zuby hrebe\u0148a?<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Plynul\u00fd prechod:<\/strong> Aby va\u0161e auto nedostalo pri ka\u017edom prejazde defekt, zuby zabezpe\u010duj\u00fa, \u017ee koleso je v\u017edy aspo\u0148 s\u010dasti podopret\u00e9 kovom.<\/li>\n\n\n\n<li><strong>Odv\u00e1dzanie vody:<\/strong> Tieto mechanizmy s\u00fa navrhnut\u00e9 tak, aby odv\u00e1dzali da\u017e\u010fov\u00fa vodu pre\u010d z hlavnej kon\u0161trukcie, \u010d\u00edm chr\u00e1nia lo\u017eisk\u00e1 mosta pred hrdzou.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u26a0\ufe0f Riziko, o ktorom sa ml\u010d\u00ed<\/h3>\n\n\n\n<p>Hoci s\u00fa medzery \u017eivotne d\u00f4le\u017eit\u00e9, s\u00fa z\u00e1rove\u0148 najslab\u0161\u00edm \u010dl\u00e1nkom. Ak sa do nich dostane \u0161trk, \u013ead alebo ne\u010distoty, most sa pri roz\u0165ahovan\u00ed \u201ezasekne\u201c. Tento obrovsk\u00fd vn\u00fatorn\u00fd tlak je tich\u00fdm zabijakom mostov po celom svete a je hlavn\u00fdm d\u00f4vodom, pre\u010do musia in\u017einieri tieto \u0161k\u00e1ry pravidelne \u010disti\u0165.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>Zauj\u00edmavos\u0165 na z\u00e1ver:<\/strong> Eiffelova ve\u017ea v Par\u00ed\u017ei sa v lete vplyvom tepla zv\u00e4\u010d\u0161\u00ed a\u017e o <strong>15 centimetrov<\/strong>. Keby bola pevne ukotven\u00e1 do bet\u00f3nu bez v\u00f4le, u\u017e d\u00e1vno by sa zr\u00fatila.<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Zauj\u00edma v\u00e1s, ako in\u017einieri stavaj\u00fa mosty hlboko pod vodou bez toho, aby sa robotn\u00edci utopili?<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mo\u017eno to na prv\u00fd poh\u013ead vyzer\u00e1 ako chyba v projekte alebo zanedban\u00e1 \u00fadr\u017eba, ale tie \u201eobrovsk\u00e9 medzery\u201c (odborne naz\u00fdvan\u00e9 dilata\u010dn\u00e9 \u0161k\u00e1ry) s\u00fa v skuto\u010dnosti to jedin\u00e9, \u010do dr\u017e\u00ed mosty vcelku. [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":671,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-670","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zivotne-triky"],"_links":{"self":[{"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=\/wp\/v2\/posts\/670"}],"collection":[{"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=670"}],"version-history":[{"count":1,"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=\/wp\/v2\/posts\/670\/revisions"}],"predecessor-version":[{"id":672,"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=\/wp\/v2\/posts\/670\/revisions\/672"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=\/wp\/v2\/media\/671"}],"wp:attachment":[{"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=670"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=670"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=670"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}