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Paul Séjourné

April 09, 2023

Paul Séjourné (21 December 1851; Orléans – 19 January 1939; Paris) was a French engineer who specialized in the construction of large bridges from masonry, a domain in which he made some important innovations.[1][2]

Paul Séjourné

Biography

Paul Séjourné graduated from the École polytechnique in 1873 and the civil engineering grande école École nationale des Ponts et Chaussées (ENPC) in 1876, he was appointed Ingénieur des ponts et chaussées in Mende in 1877, then in Toulouse in 1890. In these two positions, Séjourné was responsible for the planning and construction of several railway lines. He made his reputation with innovative methods, and 1886 was decorated with the Légion d'honneur, with the citation 'has designed and built on several railway lines in planning or under construction long span bridges which should be considered as a basis for design'. Between 1890 and 1893, Séjourné took time off from public service to work for the Fives-Lille company in Spain. In 1896 he left the civil service and joined the Chemins de fer de Paris à Lyon et à la Méditerranée (PLM) as chief engineer based in Dijon, all the while continuing to lead other important projects such as the Adolphe Bridge in Luxembourg.[2] He became chief of the construction department of the PLM in 1909. In 1916, Marshal Lyautey named him director of the Moroccan railways. He then returned to the PLM as vice-director in 1919 before retiring at 76 with the title of honorary director.

Between 1901 and 1922, Séjourné taught the construction of large masonry bridges at the ENPC and published a 6 volume manual Grandes Voûtes ('Great Arches) which brought together all his knowledge on the subject. After winning the Caméré prize in 1918, he was elected to the French Academy of Sciences in 1924.[2] In 1926 he was promoted to 'grand officer of the Légion d'honneur'.[2]

A street of the 6th arrondissement of Paris where Paul Séjourné once lived is named in his honor.[3]

Technical Contributions

Paul Séjourné developed some technical innovations : Design and calculation of Centring : Séjourné demonstrated the value of constructing arches by parallel sections, so that the centering only had to support the weight of the section under construction. When a section was complete it bore its own weight and the centering could then support the weight of the next section. The Romans used this technique to limit the cost of the centring but since the Renaissance period it had become standard to make centring that could support the full load of the arch and construct the arch in one go. Séjourné showed that the older technique was perfectly viable and could lower the weight and cost of the centering by up to 70%.

He then introduced twin arches to support a single deck on the Adolph bridge. The weight of the arches is significantly lower, thus reducing the force on the buttresses. He repeated the technique on the Pont des Amidonniers in Toulouse. This technique became widely adopted outside France and was known as the 'Séjourné design'.

While his contemporaries such as Gustav Eiffel resorted systematically to metalwork, Séjourné continued to design and build large span arch bridges in masonry until the end of the 1920s. Thereafter it became cheaper to build with concrete.

Works

Paul Séjourné participated in the following works as:

Designer

1884 : Pont Antoinette (known as pont de l’Aiguillou) in Sémalens, Lavaur railway bridge, pont de Saint-Waast at Couffouleux, all three on the Montauban-Ville-Bourbon to La Crémade line.

1884 : Pont de Castelet (Ariège), on the Portet-Saint-Simon to Puigcerda line.

1904 : Pont Adolphe in Luxembourg (road bridge over the Pétrusse, with an 84m centre span).

1907 : Pont Séjourné carrying the Avenue Séjourné over the canal de Brienne in Toulouse.

1908 : Pont de Fontpédrouse (known as the pont Séjourné) and viaduc de la Cabanasse (1910) on the Cerdagne line.

1909 : Viaduc de Chanteloube on the Ubaye line from Chorges to Barcelonette. The line was never completed and the viaduct is now submerged in the Serre-Ponçon reservoir, but visible when the water level falls.

1911 : Pont des Amidonniers, known as pont des Catalans, a road bridge over the Garonne in Toulouse.

1912 : Morez viaducts in the Jura on the Andelot-en-Montagne - La Cluse line and the Pont Sidi Rached, Constantine (Algeria).

1914 : Viaduc de la calanque des Eaux salées, viaduc de Corbière, viaduc de la calanque de la Vesse, on the Côte Bleue railway line.

1915 : Mont-d'Or tunnel between Frasne to Vallorbe on the line from Lausanne to Paris

1922 : Viaduc de Saorge (Alpes-Maritimes), on the Tenda line from Nice to Cunéo. This viaduct was destroyed in 1940 by the French army.

1925 : Viaduc de Laussonne et Viaduc de la Recoumène, on the le Puy - Aubenas line, which was never opened.

1926 : Viaduc d’Erbosseria, Peille, Viaduc de L'Escarène, Viaduc du Caï (over the Bévéra), Viaduc du Scarassouï over the Roya (destroyed by the German army in 1944), Viaduc de de Saint-Dalmas-de-Tende, on the Tenda railway line. Also a road bridge in Compiègne over the Oise (destroyed by the French army in June 1940).

1928 : Viaduc de la Roizonne and Viaduc de la Bonne, on the la Mure - Corps railway line are today road bridges.

Engineer

1888 : Transcaspian railway project, Samarkand (Uzbekistan).

1912 : Andelot-en-Montagne - La Cluse railway line (Jura).

Chief Engineer

1908 : Bort-les-Orgues to Neussargues railway line in the Massif Central,

1920 to 1934 : in Morocco, the building of the Casablanca - Oued-Zem lines, at Rabat and Marrakech, and the Fez - Oujda junction completing the "imperial way" between Marrakesh and Tunis.

1926 : Tenda line (Nice - Cuneo).

Bibliography

Marc, Giraud; Pascal Bejui (October 2010). Paul Séjourné: Génie des Grand Viaducs (in French). La Roche-Blanche, France: La Regordane. p. 208. ISBN 978-2-906984-89-9.

References

  1. ^ "SÉJOURNÉ Paul" (in French). Planète TP. Retrieved 23 July 2012.
  2. ^ a b c d Jouret, Auguste (May 1946). "Paul Séjourné (1851-1939)". Technica (in French) (76).
  3. ^ "rue Paul Séjourné" (in French). Ville de Paris. Retrieved 23 July 2012.

Gallery

  •  

    Adolphe Bridge, Luxembourg (1903)

  •  

    Pont Antoinette (known as pont de l’Aiguillou) in Sémalens, Tarn (1884)

  •  

    Pont des Amidonniers or Pont des Catalans, Toulouse (1907)

  •  

    Pont Séjourné, Fontpédrouse, Pyrénées-Orientales (1908).

  •  

    The Morez viaducts on the Andelot-en-Montagne - La Cluse line, Jura (1912)

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    Chanteloube viaduct, near Chorges, Hautes-Alpes (1909 - 1935)

  •  

    Viaduc des Eaux-salées, Bouches-du-Rhône (1914)

  •  

    Corbière viaduct, Marseille-L'Estaques (1915)

  •  

    Recoumène viaduct, at Monastier-sur-Gazeille (1925)

  •  

    L'Escarène viaduct on the Tenda line (1927)

  •  

    Bevera viaduct on the Tenda line (1927/1962)

  •  

    Bonne viaduct, at Valbonnais, Isère (1928)

  •  

    Roizonne viaduct, La Mure, Isère (1928)

April 09, 2023
paul, séjourné, december, 1851, orléans, january, 1939, paris, french, engineer, specialized, construction, large, bridges, from, masonry, domain, which, made, some, important, innovations, contents, biography, technical, contributions, works, designer, engine. Paul Sejourne 21 December 1851 Orleans 19 January 1939 Paris was a French engineer who specialized in the construction of large bridges from masonry a domain in which he made some important innovations 1 2 Paul Sejourne Contents 1 Biography 2 Technical Contributions 3 Works 3 1 Designer 3 2 Engineer 3 3 Chief Engineer 4 Bibliography 5 References 6 GalleryBiography EditPaul Sejourne graduated from the Ecole polytechnique in 1873 and the civil engineering grande ecole Ecole nationale des Ponts et Chaussees ENPC in 1876 he was appointed Ingenieur des ponts et chaussees in Mende in 1877 then in Toulouse in 1890 In these two positions Sejourne was responsible for the planning and construction of several railway lines He made his reputation with innovative methods and 1886 was decorated with the Legion d honneur with the citation has designed and built on several railway lines in planning or under construction long span bridges which should be considered as a basis for design Between 1890 and 1893 Sejourne took time off from public service to work for the Fives Lille company in Spain In 1896 he left the civil service and joined the Chemins de fer de Paris a Lyon et a la Mediterranee PLM as chief engineer based in Dijon all the while continuing to lead other important projects such as the Adolphe Bridge in Luxembourg 2 He became chief of the construction department of the PLM in 1909 In 1916 Marshal Lyautey named him director of the Moroccan railways He then returned to the PLM as vice director in 1919 before retiring at 76 with the title of honorary director Between 1901 and 1922 Sejourne taught the construction of large masonry bridges at the ENPC and published a 6 volume manual Grandes Voutes Great Arches which brought together all his knowledge on the subject After winning the Camere prize in 1918 he was elected to the French Academy of Sciences in 1924 2 In 1926 he was promoted to grand officer of the Legion d honneur 2 A street of the 6th arrondissement of Paris where Paul Sejourne once lived is named in his honor 3 Technical Contributions EditPaul Sejourne developed some technical innovations Design and calculation of Centring Sejourne demonstrated the value of constructing arches by parallel sections so that the centering only had to support the weight of the section under construction When a section was complete it bore its own weight and the centering could then support the weight of the next section The Romans used this technique to limit the cost of the centring but since the Renaissance period it had become standard to make centring that could support the full load of the arch and construct the arch in one go Sejourne showed that the older technique was perfectly viable and could lower the weight and cost of the centering by up to 70 He then introduced twin arches to support a single deck on the Adolph bridge The weight of the arches is significantly lower thus reducing the force on the buttresses He repeated the technique on the Pont des Amidonniers in Toulouse This technique became widely adopted outside France and was known as the Sejourne design While his contemporaries such as Gustav Eiffel resorted systematically to metalwork Sejourne continued to design and build large span arch bridges in masonry until the end of the 1920s Thereafter it became cheaper to build with concrete Works EditPaul Sejourne participated in the following works as Designer Edit 1884 Pont Antoinette known as pont de l Aiguillou in Semalens Lavaur railway bridge pont de Saint Waast at Couffouleux all three on the Montauban Ville Bourbon to La Cremade line 1884 Pont de Castelet Ariege on the Portet Saint Simon to Puigcerda line 1904 Pont Adolphe in Luxembourg road bridge over the Petrusse with an 84m centre span 1907 Pont Sejourne carrying the Avenue Sejourne over the canal de Brienne in Toulouse 1908 Pont de Fontpedrouse known as the pont Sejourne and viaduc de la Cabanasse 1910 on the Cerdagne line 1909 Viaduc de Chanteloube on the Ubaye line from Chorges to Barcelonette The line was never completed and the viaduct is now submerged in the Serre Poncon reservoir but visible when the water level falls 1911 Pont des Amidonniers known as pont des Catalans a road bridge over the Garonne in Toulouse 1912 Morez viaducts in the Jura on the Andelot en Montagne La Cluse line and the Pont Sidi Rached Constantine Algeria 1914 Viaduc de la calanque des Eaux salees viaduc de Corbiere viaduc de la calanque de la Vesse on the Cote Bleue railway line 1915 Mont d Or tunnel between Frasne to Vallorbe on the line from Lausanne to Paris1922 Viaduc de Saorge Alpes Maritimes on the Tenda line from Nice to Cuneo This viaduct was destroyed in 1940 by the French army 1925 Viaduc de Laussonne et Viaduc de la Recoumene on the le Puy Aubenas line which was never opened 1926 Viaduc d Erbosseria Peille Viaduc de L Escarene Viaduc du Cai over the Bevera Viaduc du Scarassoui over the Roya destroyed by the German army in 1944 Viaduc de de Saint Dalmas de Tende on the Tenda railway line Also a road bridge in Compiegne over the Oise destroyed by the French army in June 1940 1928 Viaduc de la Roizonne and Viaduc de la Bonne on the la Mure Corps railway line are today road bridges Engineer Edit 1888 Transcaspian railway project Samarkand Uzbekistan 1912 Andelot en Montagne La Cluse railway line Jura Chief Engineer Edit 1908 Bort les Orgues to Neussargues railway line in the Massif Central 1920 to 1934 in Morocco the building of the Casablanca Oued Zem lines at Rabat and Marrakech and the Fez Oujda junction completing the imperial way between Marrakesh and Tunis 1926 Tenda line Nice Cuneo Bibliography EditMarc Giraud Pascal Bejui October 2010 Paul Sejourne Genie des Grand Viaducs in French La Roche Blanche France La Regordane p 208 ISBN 978 2 906984 89 9 References Edit SEJOURNE Paul in French Planete TP Retrieved 23 July 2012 a b c d Jouret Auguste May 1946 Paul Sejourne 1851 1939 Technica in French 76 rue Paul Sejourne in French Ville de Paris Retrieved 23 July 2012 Gallery Edit Adolphe Bridge Luxembourg 1903 Pont Antoinette known as pont de l Aiguillou in Semalens Tarn 1884 Pont des Amidonniers or Pont des Catalans Toulouse 1907 Pont Sejourne Fontpedrouse Pyrenees Orientales 1908 The Morez viaducts on the Andelot en Montagne La Cluse line Jura 1912 Chanteloube viaduct near Chorges Hautes Alpes 1909 1935 Viaduc des Eaux salees Bouches du Rhone 1914 Corbiere viaduct Marseille L Estaques 1915 Recoumene viaduct at Monastier sur Gazeille 1925 L Escarene viaduct on the Tenda line 1927 Bevera viaduct on the Tenda line 1927 1962 Bonne viaduct at Valbonnais Isere 1928 Roizonne viaduct La Mure Isere 1928 Retrieved from https en wikipedia org w index php title Paul Sejourne amp oldid 1092209084, wikipedia, wiki, book, books, library,

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