Sven Hultin

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Sven Hultin 1937

Sven Hultin (born October 12, 1889 in Fässberg , Göteborgs och Bohus län ; † January 28, 1952 in Gothenburg ) was a Swedish civil engineer and pioneer in geotechnical engineering and a local politician in Gothenburg.

Life

Hultin attended the Higher Latin School in Gothenburg until his Abitur in 1908 and then studied at the Chalmers Technical University in Gothenburg until his diploma in 1912 . He then worked as an engineer at the port administration in Gothenburg. At the same time he was assistant (for bridge construction and hydraulic engineering) and from 1920 professor for hydraulic engineering and road construction at the Chalmers University of Technology, from 1949 for structural analysis. He was rector there from 1933 to 1943. At the same time he was a consulting engineer in Gothenburg until his death in 1920, among other things for bridge construction.

In 1944 he was awarded an honorary doctorate from the Royal Stockholm University of Technology . From 1942 to 1952 he was head of the State Research Council and the State Committee for Building Research.

Hultin was a member of the Royal Swedish Academy of Engineering and the Kungliga Vetenskaps- och Vitterhetssamhället i Göteborg . He was also active in numerous municipal and ecclesiastical institutions, was a councilor and at times head of the cathedral chapter, head of the city council (Stadsfullmäktige) in Gothenburg (1927 to 1930 and 1935 to 1943) and from 1927 to 1930 and 1935 to 1937 elector for the first chamber of the Swedish Reichstag .

Since 1922 he was married to the doctor's daughter Margit Wetterqvist.

plant

Sweden played an important role in the development of early geotechnical engineering, due in particular to the frequent occurrence of marine ice-age clays. The starting point was numerous landslides in clay soils, especially on the central railway lines, which was examined in a state commission by Stockholm Professor Wolmar Fellenius (final report 1922), and the slipping of several quay systems (for example the Stigberg quay in the port of Gothenburg in 1916), which Hultin and Knut Petterson (1881–1966) examined. Knut E. Petterson was an officer and manager of the port construction in Gothenburg, under which Hultin was employed as an engineer at the time. The two found that the clay (in contrast to the experience in sand on which the design was based at the time) had approximately circular slip surfaces and developed the slip circle method for slope stability. However, as was customary at the time, they analyzed the slope break in the clay with a friction angle according to Coulomb, which they calculated from the measured slope break to be 9 degrees, in contrast to the 20 or more degrees usually assumed at that time (with straight slope break surfaces, from the Experience with rolling material).

The report by Petterson and Hultin was used as a basis by the commission set up in 1916 for the reconstruction of the quays. The commission included port construction experts such as the professor at the Technical University of Braunschweig Max Möller or the head of port construction in Rotterdam H. van Ysselstein and Fellenius from Stockholm and Petterson. Before the construction of new quays according to the revised design regulations, a full-scale load test was also carried out. The sheet pile wall by the water was made of concrete with wooden structures behind it.

In accordance with the experience gained in the commission, Möller corrected the earth pressure tables previously published by him in a second edition in 1922. Fellenius adopted the slip circle method in several publications from 1918, applied it in the analysis of landslides in clay for the Swedish railways (final report 1922) and in his book Earth Static Calculations from 1926. In addition to the approach of an angle of friction, he also took into account cohesion. Petterson reports in his Geotechnique article that his successor Torsten Hultin recalculated the landslides using cohesion in 1937 and came to similar results for the safety factor.

Geotechnical engineering in Sweden was organized by a department in the road construction administration from 1936 under Walter Kjellman, which in 1944 became the Swedish Geotechnical Institute (SGI). In 1950 the Swedish Geotechnical Society was founded.

literature

  • Knut Petterson The early history of circular sliding surfaces , Geotechnique, Volume 5, 1955, p. 275.

Web links

Individual evidence

  1. ↑ called internally at the University of the Great Sven , Stor-Sven
  2. ^ Karl-Eugen Kurrer : The History of the Theory of Structures. Searching for Equilibrium . Berlin: Ernst & Sohn 2018, p. 341ff., ISBN 978-3-433-03229-9 .
  3. ↑ Knut E. Petterson was chief engineer of the port of Gothenburg from 1911 to 1948. Skempton A history of soil properties 1717-1927 , Proc. 11. ICSMFE, 1985, reprinted in its Selected Works
  4. ↑ Published independently in two papers in Teknisk Tidskript, Volume 46, 1916. Title of the work by Hultin Kiesfüllungen für Kai Constructions (Swedish), p. 292, Title of the work by Petterson: Collapse of a Quay Wall in Gothenburg (Swedish), p. 289.
  5. ^ What Alexandre Collin had already observed when building canals in France, but his treatise of 1846 had been forgotten
  6. ↑ Fellenius was responsible for the port construction in Gothenburg before Petterson. Petterson was his successor in 1911.
  7. ↑ Because of the shipworm that was dragged into the Baltic Sea, there were no wooden structures on the water
  8. ↑ In Swedish. German translation 1927
personal data
SURNAME Hultin, Sven
BRIEF DESCRIPTION Swedish civil engineer
DATE OF BIRTH October 12, 1889
PLACE OF BIRTH Fassberg
DATE OF DEATH January 28, 1952
Place of death Gothenburg