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  • 1. Bergau, Werner
    Measurements in grain silos during filling and emptying1959Rapport (Övrigt vetenskapligt)
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  • 2. Cadling, Lyman
    et al.
    Odenstad, Sten
    Vane borer. An apparatus for determining the shear strength of clay soils directly in the ground1950Rapport (Övrigt vetenskapligt)
    Abstract [en]

    Laboratory shear strength tests on clay samples extracted from boreholes often give too small strength values as compared with values obtained in stability analyses, especially when samples are taken from great depths. This may largely be due to changes in the pressure conditions during the extraction of samples. A method for determining the shear strength of clay soils directly in the ground is described. The strength test is made by driving a vane into the soil and rotating it, while measuring the resistance to rotation. The shear strength is calculated from the torsional moment thus obtained.

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  • 3. Cecil, Owen S
    Correlations of rock bolt-shotcrete support and rock quality parameters in Scandinavian tunnels1975Rapport (Övrigt vetenskapligt)
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  • 4. Fellenius, Bengt H
    Negative skin friction on long piles driven in clay1971Rapport (Övrigt vetenskapligt)
    Abstract [en]

    (I) Results of a full scale investigation on instrumented piles; (II) General views and design recommendation

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  • 5. Hansbo, Sven
    Consolidation of clay, with special reference to influence of vertical sand drains. A study made in connection with full-scale investigations at Skå-Edeby. Diss1961Rapport (Övrigt vetenskapligt)
    Abstract [en]

    The present paper deals with the special problems of consolidation which are met with when vertical sand drains are used in order to accelerate the rate of settlement of clay. Furthermore, certain particular phenomena connected with the consolidation problem as a whole are also treated. Chapter 1 contains a review of some important theories of consolidation. Chapter 2 gives some results of research on pore water pressures and "friction j or rather, "bond", between the ring and the clay in the oedometer test. Chapter 3 deals with the permeability of clay. The results of permeability tests are pre-sented and a new theory of permeability is suggested. A new equation of con-solidation is advanced in Chapter 4. Finally, in the light of the new findings, Chapter 5 gives the results obtained in connection with full-scale investigations in a test field, established in 1957at Skå-Edeby, 25 km west of Stockholm.

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  • 6. Hansbo, Sven
    New approach to the determination of the shear strength of clay by the fall-cone test1957Rapport (Övrigt vetenskapligt)
    Abstract [en]

    (1) Region disturbed by the cone; (2) Study of the cone motion; (3) Relation between shear strength and cone penetration; (4) Precautions to be observed in the fall-cone test; (5) Comparison between the fall-cone test and other shear strengthtests.

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  • 7. Jakobson, Bernt
    Influence of sampler type and testing method on shear strength of clay samples1954Rapport (Övrigt vetenskapligt)
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  • 8. Jakobson, Bernt
    Landslide at Surte on the Göta River1952Rapport (Övrigt vetenskapligt)
    Abstract [en]

    On the 29th of September, 1950, immediately after 8 o'clock in the morning, a very large landslide occurred in the valley of the Göta River in the southwest of Sweden. The site of the slide is located on the east bank of the river in a village named Surte, about 15 km from the mouth of the river in Kattegat, near Göteborg (Gothenburg). Geologically this province can briefly be characterized by archaean rock hills with Quaternary clay between them. The area which slipped has a width of about 400 m (parallel to the river) and a length of about 600 m, and the volume of the slide can be estimated at 4 million m3. The bank of the river had practically no height, and within a distance of about 200 m from the river the terrain was practically horizontal. Beyond that the terrain had a slope varying from 1:30 to 1:6. The slope was steepest in the northeast part of the slide area. An extensive field investigation was made in the area of the slide and in the adjacent regions. This investigation consisted in taking samples mainly by means of the soil sampler with metal foils and the piston sampler, soundings, vane tests, and measurements of the pore water pressure.

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  • 9. Kallstenius, Torsten
    Mechanical disturbances in clay samples taken with piston samplers1958Rapport (Övrigt vetenskapligt)
    Abstract [en]

    (1) General considerations; (2) Tests at Ultuna 1956; (3) Analysis of disturbance due to sampler shape; (4) Disturbance by punching operation; (5) Conclusions from Ultuna tests; (6) Tests with research sampler SGI IX.

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  • 10. Kallstenius, Torsten
    Some side-intake soil samplers for sand and gravel1953Rapport (Övrigt vetenskapligt)
    Abstract [en]

    (1) General considerations; (2) Penetration ability of samplers; (3) Sampler withdrawn after taking each sample; (4) Sampler, part of which is withdrawn after taking each sample; (5) Sampler withdrawn only once after sinking each bore hole; (5a) Wager's Sampler; (5b) Kallstenius's Sampler (Jalousie Sampler); (6) Prospective development of side-intake samplers

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  • 11. Kallstenius, Torsten
    Studies on clay samples taken with standard piston sampler1963Rapport (Övrigt vetenskapligt)
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  • 12. Kallstenius, Torsten
    et al.
    Bergau, Werner
    Investigations of soil pressure measuring by means of cells1956Rapport (Övrigt vetenskapligt)
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  • 13. Kallstenius, Torsten
    et al.
    Wallgren, Arne
    Pore water pressure measurement in field investigations1956Rapport (Övrigt vetenskapligt)
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  • 14. Kjellman, Walter
    et al.
    Cadling, Lyman
    Flodin, Nils
    New geotechnical classification system1953Rapport (Övrigt vetenskapligt)
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  • 15. Kjellman, Walter
    et al.
    Jakobson, Bernt
    Some relations between stress and strain in coarse-grained cohesionless materials1955Rapport (Övrigt vetenskapligt)
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  • 16. Kjellman, Walter
    et al.
    Kallstenius, Torsten
    Liljedahl, Yngve
    Accurate measurement of settlements1955Rapport (Övrigt vetenskapligt)
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  • 17. Kjellman, Walter
    et al.
    Kallstenius, Torsten
    Wager, Oleg
    Soil sampler with metal foils. Device for taking undisturbed samples of very great length1950Rapport (Övrigt vetenskapligt)
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  • 18. Kjellman, Walter
    et al.
    Liljedahl, Yngve
    Device and procedure for loading tests on piles1951Rapport (Övrigt vetenskapligt)
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  • 19. Odenstad, Sten
    Landslide at Sköttorp on the Lidan River1952Rapport (Övrigt vetenskapligt)
    Abstract [en]

    In 1946 a large flake of the clay plain at Sköttorp suddenly moved towards the Lidan River and filled some 800 m of its channel. In a few days the upstream water rose 12 m and then began to run off over the clay mass. During the following two years the river cut down through this mass, the upstream water sinking successively nearly to its old level. The slide caused a temporary inundation of the valley upstream of Sköttorp. Some secondary slides occurred and others were feared. A flood wave running downstream of Sköttorp was also apprehended. Remedial and preventive measures were taken, mainly consisting in building dams and digging channels to conduct the water through the site. Extensive soil investigations were made on the site and in the laboratory; most of the results are given in this report. It was found that the river bank had been severely stressed before the slide. Several factors can have acted a.s "trigger agents" e.g. the erosion in the river bed, the increasing weight of the grove on the bank, the weakening of the clay due to leaching of salt, or, most probably, a temporary increase of the ground water pressure. In order to explain how the slide could spread horizontally 200 m in the direction away from the river two assumptions must be made. One is that the clay soil had a horizontal surface or layer that was particularly weak, owing to its constitution or to a high water pressure in an adjacent sand layer. The other is that the strength of this surface or layer was almost completely destroyed, when rupture was produced in it by stress concentration. Probably a front of such rupture travelled rapidly landward, thus forming the slide bottom. At the same time and rate, rupture in the soil above this bottom spread landward in the following way. Slip surfaces, parallel to the river and inclined 45 degrees to the horizontal, appeared, forming a zigzag line in cross section. Those soil wedges thus formed which had their base on the slide bottom slipped apart without any appreciable deformation; their edges constitute the clay ridges visible in the slide cavity. The interjacent soil wedges subsided and were deformed so as to fit between the former.

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  • 20. Orrje, Olle
    et al.
    Broms, Bengt
    Strength and deformation properties of soils as determined by a free falling weight1970Rapport (Övrigt vetenskapligt)
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  • 21. Osterman, Justus
    Theoretical study of the failure conditions in saturated soils1962Rapport (Övrigt vetenskapligt)
    Abstract [en]

    The strength of soils is treated from different aspects. The imperfections of the theories and the limitations of experiences are discussed, mainly in connection with plastic clays. Attention is drawn to some fundamental properties which influence the resistance capacity to shearing. Moreover, a failure theory is introduced in which energy considerations are utilized. The differences between the stability failure on one hand and the yield failure on the other are discussed. Finally, some applications on specific cases of stability are demonstrated.

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  • 22. Pusch, Roland
    Clay microstructure. A study of the microstructure of soft clays with special reference to their physical properties1970Rapport (Övrigt vetenskapligt)
    Abstract [en]

    The microstructure of some soft Swedish clays has been investigated by electron microscopy and described by statistical methods using simple structural parameters. The microstructural pattern was found to be characterized by aggregates coupled by links and groups of small particles. Certain microstructural properties seemed to be related to the geotechnical properties of the undisturbed clay material, such as the permeability and sensitivity. The microstructural changes by consolidation and shearing have been investigated. The results formed the basis of a hypothesis concerning the mechanism of these processes. The aggregates seemed to act like rigid bodies up to a certain stress level, the rigidity probably being connected with their low water content and the very high viscosity of the pore water.

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  • 23. Rinkert, Arne
    Earth pressure from friction soils. A report on half scale tests1959Rapport (Övrigt vetenskapligt)
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  • 24. Silfverberg, Lennart
    Chemical determination of soil organic matter. A critical review of existing methods1957Rapport (Övrigt vetenskapligt)
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  • 25. Silfverberg, Lennart
    Influence of organic matter on differential thermal analysis of clays1955Rapport (Övrigt vetenskapligt)
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  • 26. Söderblom, Rolf
    Organic matter in Swedish clays and its importance for quick clay formation1974Rapport (Övrigt vetenskapligt)
    Abstract [en]

    This report deals wlth the importance of, primarily, organic matter in Swedish quick clays. Particularly, the relationship between dispersing agents and sensitivity has been investigated. A study of a great number of reports in the SGI files showed that varved, fresh-water sedimented quick clays are relatively common in Sweden. The adsorbed double layer as well as the Donnan effect and the chemical equilibrium between double layer composition and pore water composition is discussed. The possibility that organic matter can form a fissured structure in the clay is also treated. Methods have been developed to isolate dispersing agents from Swedish clays and attempts made to analyse these agents. It is found that it is easy to isolate dispersing substances but very difficult to find substances with a known composition. Especially the humic acids are impossible to analyse at present. One group of dispersing substances which can be isolated, purified and chromatographed is the soaps. These are occurring in series of both saturated and unsaturated fatty acids. Another group that can be detected comprises the ten sides. It has also been shown that dispersing agents isolated from quick clay can originate from impurities infiltrated in the ground.

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  • 27. Söderblom, Rolf
    Salt in Swedish clays and its importance for quick clay formation. Results from some field and laboratory studies1969Rapport (Övrigt vetenskapligt)
    Abstract [en]

    This report deals mainly with the importance of salt in Swedish clays. Especially the relationship between salt and sensitivity has been investigated. Methods have been developed by which the salt content in Swedish clays can be determined rapidly. A special instrument, "the salt sounding tool", has been used in the field to determine the approximate salt content in a clay. Rapid chromatographic methods have been developed and used to study the ionic composition of the pore water in clays. The salt conditions in clays from different parts of Sweden are discussed. It has not been possible to correlate the sensitivity of Swedish clays with the total salt content. There exists, however, a correlation between the ionic composition of the pore water of a clay and the sensitivity. Quick clays have an ionic composition which is not in accordance with the simple Donnan effect condition due to the presence of organic material in the clay. The investigation also shows that the strength properties of extracted samples of quick clay change with time. A method has been developed to detect slip surfaces in slides from salt soundings. The report also includes a study of the diffusion processes in clays as well as a laboratory investigation of the leaching processes.

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  • 28.
    Standard piston sampling. A report by the Swedish Committee on Piston Sampling1961Rapport (Övrigt vetenskapligt)
    Abstract [en]

    (1) General report. By the Swedish Committee on Piston Sampling; (2) Lundström, Rune: Influence of sample diameter in consolidationtests; (3) Hellgren, Arne: Strength dispersion in fall-cone tests on varvedclay; (4) Sandegren, Erik: Sample transportation problems; (5) Kallstenius, Torsten: A standard piston sampler prototype

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