{"id":41,"date":"2020-10-16T08:22:17","date_gmt":"2020-10-16T06:22:17","guid":{"rendered":"http:\/\/hgr.hr\/?page_id=41"},"modified":"2023-07-03T20:04:21","modified_gmt":"2023-07-03T18:04:21","slug":"vodoistrazni-radovi","status":"publish","type":"page","link":"https:\/\/hgr.hr\/?page_id=41","title":{"rendered":"VODOISTRA\u017dNI RADOVI"},"content":{"rendered":"\t\t
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IZVEDBA KVALITETNOG ZDENCA (bunara)<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n\t\t\t\tIzvedba kvalitetnog zdenca (bunara), zahtijeva vrlo stru\u010dan pristup ve\u0107 od samog lociranja zdenca (bunara); izbora tehnologije bu\u0161enja; vrste ugradbenog materijala (posebice filtra); konstrukcije zdenca\/bunara. VODOVOD-HIDROGEOLO\u0160KI RADOVI d.o.o. aktivno sudjeluje u svim navedenim stavkama, kako sa svojim stru\u010dnim savijetima, tako i samim izvo\u0111enjem vodoistra\u017enih radova u svim vrstama materijala.\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\tU nekim sul\u010dajevima postoje tereni gdije se mo\u017ee pretpostaviti izda\u0161nost zdenca\/bunara odgovaraju\u0107e konstrukcije bez vodoistra\u017enih radova, ali to su male iznimke. Kako bi se eliminirao rizik pogre\u0161nih predvi\u0111anja ili rezultata nestru\u010dnih istra\u017eivanja, te pove\u0107ala mogu\u0107nost uspje\u0161ne izvedbe; potreban je stru\u010dan pristup, po\u010dev\u0161i od prospekcije terena i uvida u geolo\u0161ku gra\u0111u terena temeljem geolo\u0161kih i hidrogeolo\u0161kih karata, odnosno rezultata prethodnih istra\u017eivanja. Ukoliko se procijeni povoljno stanje tj. postojanje podzemne vode i njene potrebne koli\u010dine na ekonomski opravdanim dubinama, slijede istra\u017ena bu\u0161enja i testiranja, te se na kraju temeljem dobivenih relevantnih podataka projektira i izra\u0111uje zdenac.\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\tKonstrukcije zdenaca naj\u010de\u0161\u0107e su od \u010deli\u010dnih, pocin\u010danih, inox, PVC (polivinilklorid) ili PEHD (plietilen-high-density) cijevi, \u010diju nabavu i dostavu na lokaciju VODOVOD-HIDROGEOLO\u0160KI RADOVI d.o.o. U zoni vodonosnog sloja, zacjevljenje bunara se izvodi bunarskim filterskim cijevima koji se rade od razli\u010ditih konstrukcija preforiranih cijevi (mosti\u0107avi, \u017ei\u010dani, slotirani, vi\u0161eslojni i sl.), koji omogu\u0107avaju uticanje vode iz vodonosnika u zdenac.\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\tU donji dio bunarskog zacjevljenja (ispod filtera) ugra\u0111uje se talo\u017enik, naj\u010de\u0161\u0107e se konusnim zavr\u0161etkom na donjem dijelu zbog lak\u0161e ugradnje i odr\u017eavanja. Prstenasti prostor izme\u0111u postavljene konstrukcije cijevi i bu\u0161otine, popunjava se glinenim tamponom u zoni pune cijevi, a \u0161ljun\u010danim granuliranim zasipom u zoni bunarskog filtra. Tamponod povr\u0161ine terena do vodonosnog sloja, ima funkciju nepropusnog sloja koji sprije\u010dava zaga\u0111enje zdenca.\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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ISTRA\u017dNO BU\u0160ENJE <\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n\t\t\t\tIstra\u017ena bu\u0161enja su temeljna ispitivanja koja se provode za potrebe hidrogeologije. Promjer bu\u0161otina je razli\u010dit, no u praksi se on naj\u010de\u0161\u0107e kre\u0107e izme\u0111u \u00d825 i \u00d8200 mm. Dubina bu\u0161enja mo\u017ee biti ve\u0107a i od 1000 m, no vezano uz na\u0161e hidrogeolo\u0161ke prilike dubina bu\u0161enja rijetko prelazi 150 m. \t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\tPrema na\u010dinu izvedbe istra\u017ena se bu\u0161otina mo\u017ee izvesti ru\u010dnim i motornim na\u010dinom. Ru\u010dno bu\u0161enje se u principu vr\u0161i u nevezanim klasti\u010dnim sedimentima do dubine oko 20 m, iako su u Kini u pro\u0161losti izbu\u0161ene bu\u0161otine ru\u010dnim postupkom i preko 1000 m. Motorno bu\u0161enje je sigurno osnovni i naj\u010de\u0161\u0107e primjenjivani na\u010din istra\u017eivanja svih vrsta stijena \u00bbin situ\u00ab. S obzirom na smjer bu\u0161enja mogu biti: vertikalna, kosa i horizontalna. Bu\u0161otina se mo\u017ee izvesti sa i bez jezgrovanja.\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\tJezgrovanje zna\u010di da se u tijeku bu\u0161enja posebnim priborom uzimaju uzorci nabu\u0161enih stijena. U nevezanim klasti\u010dnim sedimentnim stijenama ti \u0107e uzorci biti \u00abporeme\u0107eni\u00bb. U slabo vezanim klasti\u010dnim sedimentima, te u svim \u010dvrstim stijena nabu\u0161ena, \u0107e jezgra biti relativno \u00abneporeme\u0107ena\u00bb, a to zna\u010di da \u0107e biti gotovo ista kao u prirodi. Nabu\u0161ena se jezgra geolo\u0161ki determinira, a po potrebi se uzorci i laboratorijski ispituju. Izvedba bu\u0161otine mo\u017ee se provesti: udarnim, udarno-rotacionim i rotacionim posutpkom. \t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\tOdabir metode izvedbe bu\u0161otine prvenstveno ovisi o litolo\u0161ko-petrografskom sastavu stijena. O vrsti i zna\u010dajkama stijena, te kona\u010dnoj namjeni bu\u0161otine ovisit \u0107e kojih \u0107e dimenzija biti po\u010detni i zavr\u0161ni profil bu\u0161otine. Naime, u nekim litolo\u0161kim sredinama mo\u017ee do\u0107i do smanjivanja profila bu\u0161otine, \u0161to je u biti posljedica razli\u010ditih stanja nabu\u0161ene stijene (bujanje stijena, razlomljenost stijena, zaru\u0161avanje materijala i dr.). Zbog toga se, a posebice kod dubokih bu\u0161otina, smanjuje profil bu\u0161enja.\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\tNerijetko se doga\u0111a da u bu\u0161otinu treba privremeno ugraditi za\u0161titne cijevi \u010dija je prvenstvena namjena spre\u010davanje zaru\u0161avanja bu\u0161otine (tzv. \u00bbteleskopska konstrukcija\u00ab bu\u0161otine). Nabu\u0161eni se materijal mo\u017ee na povr\u0161inu iznijeti: \u00bbsuhim postupkom\u00ab, komprimiranim zrakom, vodom i razli\u010ditim isplakama. Isplakom se naziva vodena otopina razli\u010ditih supstancija, koje se koriste pri bu\u0161enju. Naj\u010de\u0161\u0107e i u naj\u0161iroj primjeni su bentonitne isplake kojima se mogu dodavati razli\u010diti aditivi.\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\tBentonit je vrsta glinovitih materijala koja u svom sastavu ima montmorilonit (silikatni mineral koji buja u kontaktu s vodom). Isplaka se kod direktne metode u bu\u0161otinu utiskuje kroz bu\u0161a\u010de \u0161ipke i pribor za bu\u0161enje, a izlazi na povr\u0161inu kroz prstenasti otvor izme\u0111u stijenke bu\u0161otine i bu\u0161a\u010deg pribora.\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\tU nekim vodoistra\u017enim, a posebice u vodozahvatnim radovima, primjenjuje se metoda reversnog bu\u0161enja. Reversno bu\u0161enje se naziva zbog toga \u0161to isplaka kroz bu\u0161a\u010di pribor cirkulira obratno, a to zna\u010di od dna prema u\u0161\u0107u bu\u0161otine (Slika 4.4.c). Bu\u0161enje se u ve\u0107ini slu\u010dajeva provodi \u010distom vodom. Usprkos zna\u010dajnih pripremnih radova koji trebaju prethoditi ovoj metodi, to je sigurno najbolji i najbr\u017ei na \u010din izvedbe bu\u0161otina za kaptiranje vodonosnika u nevezanim klasti\u010dnim sedimentima.\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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PROJEKTIRANJE<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n\t\t\t\tZa potrebe izvo\u0111enja istra\u017enih bu\u0161otina, izvedbu zdenaca, bu\u0161otina za sustave grijanja\/hla\u0111enja (dizalice topline) i ostale radove tvrtka VODOVOD-HIDROGEOLO\u0160KI RADOVI d.o.o. izra\u0111uje programe radova, projekte za bu\u0161enja, elaborate o izvedenim radovima, dokumentaciju potrebnu za izdavanje vodopravnih dozvola, vodopravnih uvjeta i koncesija za zahvat vode te druge svrhe.\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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MONITORING<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n\t\t\t\tTvrtka VODOVOD-HIDROGEOLO\u0160KI RADOVI d.o.o vr\u0161i uslugu monitoringa razina i kvaliteta podzemnih voda. Monitoring se vr\u0161i iz vi\u0161e razloga: kontrola kakvo\u0107e vode za javnu vodoopskrbu, pra\u0107enje razina podzemne vode, pra\u0107enje promjena u vodonosnicima, utjecaj \u010dovjeka ili okoli\u0161a na podzemne vode (npr. odlagali\u0161ta otpada) itd. Monitoring se vr\u0161i na piezometrima i\/ili zdencima ukoliko su dostupni.\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

IZVEDBA KVALITETNOG ZDENCA (bunara) Izvedba kvalitetnog zdenca (bunara), zahtijeva vrlo stru\u010dan pristup ve\u0107 od samog lociranja zdenca (bunara); izbora tehnologije bu\u0161enja; vrste ugradbenog materijala (posebice filtra); konstrukcije zdenca\/bunara. VODOVOD-HIDROGEOLO\u0160KI RADOVI d.o.o. aktivno sudjeluje u svim navedenim stavkama, kako sa svojim stru\u010dnim savijetima, tako i samim izvo\u0111enjem vodoistra\u017enih radova u svim vrstama materijala.U nekim sul\u010dajevima postoje …<\/p>\n

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