Fresa meccanica ad attacco puntuale

Abbozzo ingegneria
Questa voce sull'argomento ingegneria è solo un abbozzo.
Contribuisci a migliorarla secondo le convenzioni di Wikipedia. Segui i suggerimenti del progetto di riferimento.
Esempio di una fresa meccanica ad attacco puntuale
Modello di una fresa ad attacco puntuale

Una fresa meccanica ad attacco puntuale (roadheader in inglese) è un'attrezzatura utilizzata per lo scavo in galleria costituita da una testa di taglio montata nel braccio, seguita da un dispositivo di caricamento che di solito coinvolge un trasportatore e un mezzo cingolato per permettere l'avanzamento dello scavo nella roccia[1].

La testa di taglio può essere in generale un cilindro rotante montato in linea o perpendicolare al braccio. Un altro tipo di macchine sono le TBM, ovvero a fresa meccanica a piena sezione[2].

Tipologie

Esistono due diverse tipologie a seconda della testa di taglio:

  • trasversale: ruota parallelamente all'asse del braccio fresa;
  • longitudinali: ruota perpendicolare all'asse del braccio fresa.

I progetti che utilizzano la fresa meccanica ad attacco puntuale

Note

  1. ^ Dr. Helmut Schneider, Criteria for Selecting a Boom-Type Roadheader, in Mining Magazine, The Mining Journal, Ltd, settembre 1988, p. 183.
  2. ^ Tunnel Virtual Team - Questions and Answers from Ask the Expert, su fhwa.dot.gov, US Department of Transportation Federal Highway Administration, 1º agosto 2006. URL consultato il 15 settembre 2006.
  3. ^ MTA - Tunnel Jacking, su masspike.com, Massachusetts Turnpike Authority. URL consultato il 15 settembre 2006 (archiviato dall'url originale il 2 settembre 2006).
  4. ^ Reconstruction : Port Authority on Schedule with Restoration of PATH Service, in New York Construction, McGraw_Hill CONSTRUCTION, luglio 2003. URL consultato il 15 settembre 2006.
  5. ^ American Underground-Construction Association's Featured Project, su auca.org, American Underground Construction Association, September 1998. URL consultato il 15 settembre 2006 (archiviato dall'url originale il 14 aprile 2013).
  6. ^ Caldecott fourth bore big dig starts today in Orinda, su contracostatimes.com, Contra Costa Times, 9 agosto 2010. URL consultato il 9 agosto 2010.

Voci correlate

Altri progetti

  Portale Ingegneria

Read other articles:

Dalem Adipati Tanumaja

Dalem Adipati Tanumaja adalah bupati Sumedang Larang ke 7 tahun 1706 – 1709, setelah wafat ayahnya Rangga Gempol III atau dikenal juga sebagai Pangeran Panembahan digantikan oleh putranya Raden Tanumaja dengan gelar Adipati, bupati pertama kali yang diangkat oleh V.O.C. Pengangkatannya pun disertai syarat, yaitu harus menempuh masa percobaan, kesetiaan dan ketaatan Raden Tanumadja terhadap pemerintah kompeni dan Pangeran Aria Cirebon sebagai atasannya karena Pangeran Aria Cirebon diangkat m...

 

1974 FA Cup final

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: 1974 FA Cup final – news · newspapers · books · scholar · JSTOR (August 2016) (Learn how and when to remove this template message) For the women's event, see 1974 WFA Cup final. Football match1974 FA Cup finalThe twin towers at Wembley StadiumEvent1973–74 FA ...

 

Slamet Soebijanto

Laksamana TNI (Purn.)Slamet Soebijanto Kepala Staf TNI Angkatan Laut ke-19Masa jabatan18 Februari 2005 – 7 November 2007PresidenSusilo Bambang Yudhoyono PendahuluBernard Kent SondakhPenggantiSumardjono Informasi pribadiLahir4 Juni 1951 (umur 72)Mojokerto, Jawa TimurKebangsaanIndonesiaAlma materAKABRI (1973)ProfesiTentaraKarier militerPihak IndonesiaDinas/cabang TNI Angkatan LautMasa dinas1973 - 2007Pangkat Laksamana TNISatuanKorps PelautSunting kotak info �...

Russian Space Forces

Branch of the Russian Aerospace Forces Russian Space ForcesКосмические войска РоссииKosmicheskie voyska RossiiEmblem of the Russian Space ForcesActive1992–19972001–20111 August 2015 – presentCountry RussiaTypeSpace forceRoleSpace warfarePart of Russian Aerospace ForcesMarch14 минут до старта (14 Minutes Until Start, official march)Anniversaries4 October (Space Forces Day)CommandersCommander-in-Chief of the Aerospace Forces Sergei Surovi...

 

Festival international du film de Palm Springs

Festival international du film de Palm Springs Date de création 1989 Durée 10 jours (janvier) Lieu Palm Springs, États-Unis Site web http://www.psfilmfest.org/index.aspx modifier - modifier le code - voir Wikidata  Le festival international du film de Palm Springs (Palm Springs International Film Festival ou PS Film Fest) est un festival de cinéma américain créé en 1989 et qui se déroule chaque année à Palm Springs, en Californie. Historique Cette section est vide, insuffisamm...

 

Temple of Derr

Facade of the reassembled Temple of Derr The Temple of Derr or el-Derr is a speos or rock-cut Egyptian temple, now located in New Amada in Lower Nubia. It was built during the 19th dynasty by Pharaoh Ramesses II.[1] It is the only rock-cut temple in Nubia, which was constructed by this pharaoh on the right (or east) bank of the Nile and used to stand at el-Derr.[2] The temple's unique position was probably because the river on its approach to the Korosko bend flows in an 'unna...

Recognition of same-sex unions in India

Part of the LGBT rights seriesLegal status ofsame-sex unions Marriage Andorra Argentina Australia Austria Belgium Brazil Canada Chile Colombia Costa Rica Cuba Denmark Ecuador Estonia Finland France Germany Greece Iceland Ireland Luxembourg Malta Mexico Nepal Netherlands1 New Zealand2 Norway Portugal Slovenia South Africa Spain Sweden Switzerland Taiwan United Kingdom3 United States4 Uruguay Recognized Israel5 Civil unions andregistered partnerships Bolivia Croatia Cyprus Czech Republic Hunga...

 

Северный морской котик

Северный морской котик Самец Научная классификация Домен:ЭукариотыЦарство:ЖивотныеПодцарство:ЭуметазоиБез ранга:Двусторонне-симметричныеБез ранга:ВторичноротыеТип:ХордовыеПодтип:ПозвоночныеИнфратип:ЧелюстноротыеНадкласс:ЧетвероногиеКлада:АмниотыКлада:Синапси...

 

海尔·塞拉西一世

海尔·塞拉西一世埃塞俄比亚皇帝統治1930年11月2日－1974年9月12日（43年314天）加冕1930年11月2日前任佐迪图繼任阿姆哈·塞拉西一世（流亡）埃塞俄比亞攝政王統治1916年9月27日－1930年11月2日（14年36天）出生(1892-07-23)1892年7月23日 埃塞俄比亚帝国哈勒爾州逝世1975年8月27日(1975歲—08—27)（83歲） 衣索比亞亚的斯亚贝巴安葬2000年11月5日圣三一大教堂配偶梅南·阿斯福（1889年－1962�...

Childbirth in Sri Lanka

Sri Lankan passport — a document issued to persons with Sri Lankan citizenship. Issues and practices related to childbirth in Sri Lanka are influenced by the sociocultural composition, political history and violence within the country. Background The island-nation of Sri Lanka. Main article: Sri Lanka Physical environment Main article: Geography of Sri Lanka Sri Lanka is a small island nation in the Indian Ocean, off the southeast coast of India. The island is characterized by a tropical mo...

 

1911 Keighley by-election

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: 1911 Keighley by-election – news · newspapers · books · scholar · JSTOR (February 2022) (Learn how and when to remove this message) The Keighley by-election was a Parliamentary by-election held on 27 October 1911.[1] The constituency returned one Membe...

 

Portrait of a Fanatic

1982 Taiwanese filmPortrait of a FanaticDVD coverTraditional Chinese苦戀Simplified Chinese苦恋Literal meaningBitter LoveHanyu PinyinKǔ Liàn Directed byWang ToonWritten byWu Nien-chenBased onBitter Loveby Bai HuaStarringMuh Sy-CherngHsu Chung-feiMeng YuanKu ChunNancy HuDoze NiuGua Ah-lehCinematographyLin Hung-chungProductioncompanyCentral Motion Picture CorporationRelease date October 22, 1982 (1982-10-22) Running time112 minutesCountryTaiwanLanguagesMandarinsome Engl...

Michael Lange

This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) This biography of a living person needs additional citations for verification. Please help by adding reliable sources. Contentious material about living persons that is unsourced or poorly sourced must be removed immediately from the article and its talk page, especially if potentially libelous.Find sources: Michael Lange – ...

 

Metropolitan Railway

Untuk kegunaan lain, lihat Metropolitan railway (disambiguasi). Gambar stasiun-stasiun Metropolitan Railway dari Illustrated London News Desember 1862, sebulan sebelum jalur kereta api tersebut dibuka Metropolitan Railway (juga dikenal sebagai Met[note 1]) adalah sebuah jalur kereta barang dan penumpang yang melayani London dari 1863 sampai 1933, yang jalur utamanya menghadap barat laut dari jantung keuangan ibu kota tersebut yang kemudian menjadi subperkotaan Middlesex. Jalur pertama...

 

Amoebozoa

Phylum of protozoans AmoebozoaTemporal range: 800–0 Ma[a] Pha. Proterozoic Archean Had. Chaos carolinensis Scientific classification Domain: Eukaryota Clade: Amorphea Phylum: AmoebozoaLühe, 1913 emend. Cavalier-Smith, 1998[3] Clades[4][5] Tubulinea Discosea Evosea Cutosea Conosa Variosea Eumycetozoa Archamoebea Synonyms Eumycetozoa Zopf 1884, emend Olive 1975[b] Amoebozoa is a major taxonomic group containing about 2,400 described species of amo...

Swimming at the 2015 African Games – Men's 200 metre backstroke

Men's 200 metre backstroke at the 2015 African GamesVenueKintele Aquatic ComplexDateSeptember 8, 2015 (2015-09-08)Competitors8 from 5 nationsMedalists  Martin Binedell   South Africa Richard Ellis   South Africa Mohamed Khaled   Egypt Swimming at the2015 African GamesFreestyle50 mmenwomen100 mmenwomen200 mmenwomen400 mmenwomen800 mmenwomen1500 mmenwomenBackstroke50 mmenwomen100 mmenwomen200 mmenwomenBreaststroke5...

 

Ofakim

Not to be confused with Afikim. City in IsraelOfaqim אוֹפָקִים / אֳפָקִים‎افقيم‎City OfaqimShow map of Northwest Negev region of IsraelOfaqimShow map of IsraelCoordinates: 31°19′N 34°37′E / 31.317°N 34.617°E / 31.317; 34.617Country IsraelDistrictSouthernFounded19 April 1955Government • MayorYitzhak DaninoArea • Total10,273 dunams (10.273 km2 or 3.966 sq mi)Population...

 

Чемпионат России по лёгкой атлетике 2006

Чемпионат России по лёгкой атлетике 2006 Город-организатор  Тула Медалей 42 Открытие 11 июня 2006 Закрытие 15 июня 2006 Дата 2006 Стадион «Арсенал» Тула 2005Тула 2007 Чемпионат России по лёгкой атлетике 2006 года проводился 11—15 июня в Туле на стадионе «Арсенал». На протяжении 5 дней бы�...

Orchies

Orchies L'hôtel de ville. Blason Logo Administration Pays France Région Hauts-de-France Département Nord Arrondissement Douai Intercommunalité Communauté de communes Pévèle-Carembault Maire Mandat Ludovic Rohart 2020-2026 Code postal 59310 Code commune 59449 Démographie Gentilé Orchésiens Populationmunicipale 8 455 hab. (2021 ) Densité 774 hab./km2 Population agglomération 16 770 hab. (2021) Géographie Coordonnées 50° 28′ 32″ nord, 3...

 

علم السموم المائية

علم السموم المائية، هو دراسة آثار المواد الكيميائية المصنعة وغيرها من المواد والأنشطة البشرية الطبيعية على الكائنات المائية بمختلف مستويات تنظيمها، من داخل الخلية إلى الأفراد وحتى المجتمعات والنظم الإيكولوجية. يُعرف علم السموم المائية بأنه المجال متعدد التخصصات الذي ي...