{"id":105876,"date":"2019-07-22T11:33:27","date_gmt":"2019-07-22T09:33:27","guid":{"rendered":"https:\/\/www.geostru.eu\/?p=105876"},"modified":"2019-07-22T14:22:21","modified_gmt":"2019-07-22T12:22:21","slug":"lucrari-de-aparare-impotriva-caderilor-de-pietre","status":"publish","type":"post","link":"https:\/\/www.geostru.eu\/ro\/blog\/2019\/07\/22\/lucrari-de-aparare-impotriva-caderilor-de-pietre\/","title":{"rendered":"LUCR\u0102RI DE AP\u0102RARE \u00ceMPOTRIVA C\u0102DERILOR DE PIETRE"},"content":{"rendered":"<p><strong>LUCR\u0102RI DE AP\u0102RARE \u00ceMPOTRIVA C\u0102DERILOR DE PIETRE<\/strong><\/p>\n<p>Separarea \u0219i c\u0103derea pietrelor (masive de roci) de pe pere\u021bi \u0219i versan\u021bi constituie un risc geologic ridicat at\u00e2t pentru oameni, c\u00e2t \u0219i pentru infrastructurile de diferite tipuri de pe teritoriul interesat de fenomen.<\/p>\n<p>\u00cen particular, pentru aceast\u0103 tipologie de interven\u021bie, este important chiar o campanie preliminar\u0103 de investiga\u021bii cu scopul de a evalua aspectele de natur\u0103 geologic\u0103, geomorfologic\u0103 \u0219i caracteristicile hidrogeologice ale sitului \u00een chestiune, pentru a combate eficient fenomenul de c\u0103dere.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-105773 size-full aligncenter\" src=\"https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_1.png\" alt=\"\" width=\"799\" height=\"472\" srcset=\"https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_1.png 799w, https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_1-500x295.png 500w, https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_1-300x177.png 300w, https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_1-768x454.png 768w\" sizes=\"(max-width: 799px) 100vw, 799px\" \/><\/p>\n<p>Tehnicile de ap\u0103rare \u00eempotriva fenomenului de c\u0103dere a rocilor sunt diferen\u021biate \u00een, active \u0219i pasive.<\/p>\n<blockquote><p><strong><a href=\"https:\/\/www.geostru.eu\/ro\/shop\/software-ro\/geomecanica\/gerock-2d-simularea-caderilor-de-roci-2d\/\">GEOROCK 2D<\/a>, software-ul pentru simularea caderii rocilor \u0219i proiectarea lucr\u0103rilor de ap\u0103rare pasiv\u0103.<\/strong><\/p><\/blockquote>\n<p>\u00cen primul caz, se trateaz\u0103 de toate lucr\u0103rile care au func\u021bia de a preveni, de a \u00eempiedica sau de atenuare a desprinderii unor mase de roc\u0103: Cuie, tije de leg\u0103tur\u0103, plase ancorate, galerii de drenaj etc.<\/p>\n<p>Tehnicile pasive au sarcina de a \u00eencetini, de a devia sau de a \u00eempiedica c\u0103derea rocilor \u0219i \u00een func\u021bie de deformabilitatea interven\u021biei, acestea sunt diferen\u021biate \u00een condi\u021bii rigide \u0219i elastice.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-105777 size-full aligncenter\" src=\"https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_2.png\" alt=\"\" width=\"837\" height=\"374\" srcset=\"https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_2.png 837w, https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_2-500x223.png 500w, https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_2-300x134.png 300w, https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_2-768x343.png 768w\" sizes=\"(max-width: 837px) 100vw, 837px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><em>Tipul de r\u0103spuns al solului la c\u0103derea p\u0103r\u021bii st\u00e2ncoase deta\u0219at\u0103 de perete: (a) roc\u0103, (b) sol deformabil), (c) sol elastic<\/em><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Printre tehnicile pasive, sunt amintite v\u0103ile \u0219i barierele \u00eempotriva c\u0103derilor de pietre.<\/strong><\/p>\n<p>V\u0103ile \u0219i barierele \u00eempotriva c\u0103derilor, sunt interven\u021bii de ap\u0103rare pasiv\u0103, realizate \u00een general la baza unor versan\u021bi st\u00e2nco\u0219i instabili supuse fenomenelor de colaps \u0219i \/ sau r\u0103sturnare, desprinderea bolovanilor, a blocurilor \u0219i a fluxurilor de resturi de propor\u021bii mari. \u00cen func\u021bie de caracteristicile morfologice ale versantului, de necesitatea \u0219i de constr\u00e2ngerile geometrice sau de alt\u0103 natur\u0103 existente pe teren, interven\u021bia poate fi constituit\u0103 de un sistem de ap\u0103rare compus dintr-o gard\u0103 \u0219i o protec\u021bie \u00eempotriva c\u0103derii de piatr\u0103 &#8222;.<\/p>\n<p>Bariera este constituit\u0103 dintr-un rambleu cu sec\u021biune trapezoidal\u0103 din material grosier, care provine din excavarea versantului sau este disponibil\u0103 \u00een zon\u0103.<\/p>\n<p>Sistemul poate fi, dup\u0103 cum s-a men\u021bionat, completat de o excavare \u00een form\u0103 de \u201cV\u201d, plasat\u0103 imediat \u00een amonte de ea. Peretele, al c\u0103rui fund este acoperit de un strat de material v\u00e2scos absorbant, \u00eendepline\u0219te func\u021bia dubl\u0103 de amortizare a energiei cinetice a rocilor \u0219i blocurilor \u00eenainte de a ajunge pe pere\u021bii digului \u0219i de a colecta reziduurile interceptate.<\/p>\n<p>De exemplu, terasamentele pot fi realizate dintr-un material incoerent grosier sus\u021binut pe partea din aval de pere\u021bi sau, alternativ, realizat cu p\u0103m\u00e2nt armat, care permite o \u00eentindere interioar\u0103, pe partea montan\u0103, cu o \u00eenclina\u021bie aproape vertical\u0103, care garanteaz\u0103 o ac\u021biune mai eficient\u0103 \u00een blocarea rocilor.<\/p>\n<p>Acest tip de structuri de ap\u0103rare pot avea o dezvoltare liniar\u0103 remarcabil\u0103 (chiar \u0219i de sute de metri), constituind un obstacol \u00een calea fluxului liber de ape curg\u0103toare de suprafa\u021b\u0103. Prin urmare, este necesar s\u0103 se prevad\u0103 realizarea unui sistem adecvat de drenaj \u0219i evacuare a apelor de suprafa\u021b\u0103 provenite din sectorul amonte al versantului.<\/p>\n<p>Barierele cu structur\u0103 trapezoidal\u0103 din p\u0103m\u00e2nt armat, realizate din materiale grosiere eventual armate cu geogriduri, servesc la protejarea infrastructurilor de dimensiuni considerabile, astfel \u00eenc\u00e2t dezvoltarea longitudinal\u0103 a lucr\u0103rii poate dep\u0103\u0219i sute de metri cu \u00een\u0103l\u021bimi de 6 \u00f7 8 m \u0219i l\u0103\u021bime 10 \u00f7 12 m la baz\u0103 \u0219i 4 \u00f7 5 m la partea de sus.<\/p>\n<p><strong>Pentru verificarea terasamentelor din p\u0103m\u00e2nt armat, Geostru a dezvoltat programul pentru \u201cTerasamente de protec\u021bie \u00eempotriva c\u0103derilor de roci\u201d.<\/strong><\/p>\n<p>Pere\u021bii rigizi, folosi\u021bi pentru a crea un obstacol pentru bolovani de p\u00e2n\u0103 la 2 m<sup>3<\/sup>, sunt dimensiona\u021bi ca un perete cu gravitate supus ac\u021biunii dinamice a bolovanului \u0219i, \u00een general, au \u0219i un zid \u00een amonte.\u00a0\u00cen cele din urm\u0103, exist\u0103 structuri mixte \u00een care digul este sus\u021binut \u00een amonte de un zid sau o gabbionat\u0103.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-106328\" src=\"https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_3-1030x507-1.png\" alt=\"\" width=\"1030\" height=\"507\" srcset=\"https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_3-1030x507-1.png 1030w, https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_3-1030x507-1-500x246.png 500w, https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_3-1030x507-1-300x148.png 300w, https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_3-1030x507-1-768x378.png 768w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Pentru dimensionarea lucr\u0103rii &#8222;de interven\u021bie&#8221;, trebuie s\u0103 fie efectuate verific\u0103rile prev\u0103zute pentru articolele fabricate din materiale moi:<\/p>\n<ul>\n<li>Verificarea capacit\u0103\u021bii portante;<\/li>\n<li>Verificarea tas\u0103rilor;<\/li>\n<li>Analiza de stabilitate a celor dou\u0103 p\u0103r\u021bi, \u00een amonte \u0219i \u00een aval, a terasamentului;<\/li>\n<li>Analiza global\u0103 de stabilitate a versantului pe care se realizeaz\u0103 lucrarea.<\/li>\n<\/ul>\n<p>Un dig disipeaz\u0103 energia cinetic\u0103 a impactului rocii prin lucrarea pe care roca trebuie s\u0103 o realizeze pentru a p\u0103trunde \u00een structura p\u0103m\u00e2ntului.<br \/>\nPrin urmare, ad\u00e2ncimea de penetrare a blocului st\u00e2ncos trebuie, calculat\u0103 \u0219i verificat\u0103 s\u0103 fie mai mic\u0103 dec\u00e2t grosimea lucr\u0103rii.<br \/>\n\u00cen caz contrar, produsul trebuie considerat ca fiind subdimensionat.<\/p>\n<p>Ad\u00e2ncimea de penetrare poate fi evaluat\u0103 cu rela\u021bia Kar (1978), \u00een cazul impactului direct cu materialul de p\u0103m\u00e2nt.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-106332\" src=\"https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_24png-1.png\" alt=\"\" width=\"816\" height=\"479\" srcset=\"https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_24png-1.png 816w, https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_24png-1-500x294.png 500w, https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_24png-1-300x176.png 300w, https:\/\/www.geostru.eu\/wp-content\/uploads\/2019\/07\/caduta_massi_24png-1-768x451.png 768w\" sizes=\"(max-width: 816px) 100vw, 816px\" \/><\/p>\n<p style=\"text-align: justify;\">&#8222;Lucrarea impotriva c\u0103derilor de pietre&#8221; se realizeaz\u0103 prin excavarea unei cunete, \u00een form\u0103 adecvat\u0103, \u00een func\u021bie de morfologia \u0219i \u00eenclina\u021bia escav\u0103rii \u00een amonte de interven\u021bie.<\/p>\n<p>\u00cen partea de jos a s\u0103p\u0103turilor se afl\u0103 un strat de material granular liber (nisip \u0219i \/ sau pietri\u0219) sau resturi de la s\u0103p\u0103turi, de aproximativ 40-100 cm grosime.<\/p>\n<p>Stratul de material granular liber are rolul de a absorbi \u0219i de atenua c\u00e2t mai mult posibil energia cinetic\u0103 a bolovanilor sau blocurilor dislocate de peretele st\u00e2ncos \u00een amonte \u0219i \/ sau laminate de-a lungul pantei.<\/p>\n<p>Geometria excav\u0103rii trebuie s\u0103 fie proiectat\u0103 astfel \u00eenc\u00e2t s\u0103 garanteze at\u00e2t interceptarea c\u00e2t \u0219i izolarea \u0219i acumularea materialului.<\/p>\n<p>\u00cen unele cazuri, pere\u021bii lucr\u0103rii din aval sunt sus\u021binu\u021bi de ziduri de sprijin cu fe\u021be \u00eenclinate (pere\u021bi celulari, ziduri de p\u0103m\u00e2nt armat), \u00een timp ce peretele din amonte, supus direct impactului, este adesea protejat de structuri rezistente deformabile, cum ar fi, de exemplu, pere\u021bii din gabioane metalice cu pere\u021bi verticali \u0219i trepte interne, foarte eficien\u021bi pentru oprirea rocilor.<\/p>\n<blockquote>\n<p style=\"text-align: justify;\">Standardul de referin\u021b\u0103 pentru proiectul de lucr\u0103ri de ap\u0103rare \u00eempotriva st\u00e2ncii este UNI 11211-4: 2018.<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>LUCR\u0102RI DE AP\u0102RARE \u00ceMPOTRIVA C\u0102DERILOR DE PIETRE Separarea \u0219i c\u0103derea pietrelor (masive de roci) de pe pere\u021bi \u0219i versan\u021bi constituie un risc geologic ridicat at\u00e2t pentru oameni, c\u00e2t \u0219i pentru infrastructurile de diferite tipuri de pe teritoriul interesat de fenomen. \u00cen particular, pentru aceast\u0103 tipologie de interven\u021bie, este important chiar o campanie preliminar\u0103 de investiga\u021bii&hellip;<\/p>\n","protected":false},"author":216,"featured_media":105791,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[592,591,4749,589,644,861],"tags":[],"class_list":["post-105876","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articole-geotehnic","category-articole-pentru-geologie","category-general-ro","category-inginerie-civila","category-news-ro","category-pubblicazioni-ro","category-592","category-591","category-4749","category-589","category-644","category-861","description-off"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v25.0) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>LUCR\u0102RI DE AP\u0102RARE \u00ceMPOTRIVA C\u0102DERILOR DE PIETRE - GeoStru EU<\/title>\n<meta name=\"description\" content=\"LUCR\u0102RI DE AP\u0102RARE \u00ceMPOTRIVA C\u0102DERILOR DE PIETRE. Separarea \u0219i c\u0103derea pietrelor (masive de roci) de pe pere\u021bi \u0219i versan\u021bi constituie un risc geologic ridicat at\u00e2t pentru oameni, c\u00e2t \u0219i pentru infrastructurile de diferite tipuri de pe teritoriul interesat de fenomen.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.geostru.eu\/ro\/blog\/2019\/07\/22\/lucrari-de-aparare-impotriva-caderilor-de-pietre\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LUCR\u0102RI DE AP\u0102RARE \u00ceMPOTRIVA C\u0102DERILOR DE PIETRE\" \/>\n<meta property=\"og:description\" content=\"LUCR\u0102RI DE AP\u0102RARE \u00ceMPOTRIVA C\u0102DERILOR DE PIETRE. 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