scholarly journals Evaluation of ground information with respect to EPB tunnelling for the Thessaloniki metro, Greece

2007 ◽  
Vol 40 (4) ◽  
pp. 1986
Author(s):  
P. G. Marinos ◽  
M. Novack ◽  
M. Benissi ◽  
G. Stoumpos ◽  
M. Panteliadou ◽  
...  
Keyword(s):  
Quaternary Sediments ◽  
Red Clay ◽  
Quaternary Deposits ◽  
Ground Investigation ◽  
Mechanized Tunnelling ◽  
Tunnel Safety ◽  
Reasonable Choice ◽  
Control Water ◽  
Base Formation

The Thessaloniki Metropolitan Railway comprises two separate ~6 m diameter parallel tunnels with an ~8 km stretch each and 13 stations. The geology of the urban area of Thessaloniki is characterised by the presence of Neogene and Quaternary deposits. The base formation for the project area is a very stiff to hard red clay, dating to Upper Miocene-Pliocene. Upon this formation, Quaternary sediments have been deposited, most of which comprise sand and/or gravel in a clay-silt dominated matrix, covered in places by anthropogenic fill. Ground investigation campaigns incorporated a significant number of sampling boreholes and in situ and laboratory testing. This information was elaborated in order to obtain a better geological understanding and a geotechnical zonation of the ground with respect to mechanized tunnelling. EPB M appears to be the reasonable choice for the project in all aspects of tunnel safety and tunnelling performance. The characteristics and parameters of the soils and the hydrogeological regime directed towards this selection and it is expected that all the objectives, such as settlement and ground movements control, water table level maintenance and adequate performance, will be met by an EPBM provided it is properly operated

scholarly journals Measurements and fire simulation models in road tunnels

2018 ◽  
Vol 196 ◽  
pp. 04077 ◽  
Author(s):  
Peter Danišovič ◽  
Juraj Šrámek ◽  
Michal Hodoň ◽  
Ján Glasa ◽  
Peter Weisenpacher ◽  
...  
Keyword(s):  
Ventilation System ◽  
Simulation Models ◽  
Project Schedule ◽  
Road Tunnel ◽  
Safety Equipment ◽  
In Situ Experiment ◽  
Emergency Event ◽  
Road Tunnels ◽  
Tunnel Safety

Ventilation system of road tunnel is one of the most important parts of the tunnel safety equipment, especially in view of the emergency event in the tunnel with fire. Last year we presented the testing and the first in situ measurements of our project entitled “Models of formation and spread of fire to increase safety of road tunnels”. With regard to our project schedule we performed also the second in situ experiment. Other part of this paper deals with computer simulations of fires of a selected Slovak road tunnel.

The influence of stratigraphy on the Variation in geotechnical properties of the offshore Quaternary succession, Scotland

1991 ◽  
Vol 7 (1) ◽  
pp. 119-126 ◽  
Author(s):  
B. D. Bone ◽  
D. Long ◽  
M. S. Stoker
Keyword(s):  
Environmental Conditions ◽  
Three Dimensional ◽  
Geotechnical Properties ◽  
Dimensional Structure ◽  
Quaternary Sediments ◽  
Quaternary Deposits ◽  
Offshore Area ◽  
Site Specific ◽  
Three Dimensional Structure ◽  
Geotechnical Studies

AbstractEvidence is presented to show the influence that Sedimentation patterns and environmental conditions have had on the geotechnical properties of Quaternary Sediments in the Scottish offshore area. An understanding of the three-dimensional structure of the Quaternary deposits greatly aids regional geotechnical studies which need to be undertaken before evaluating site specific problems.

scholarly journals Distribution and intensity of glaciotectonic deformation in Denmark

1996 ◽  
Vol 42 ◽  
pp. 175-185
Author(s):  
Peter Roll Jakobsen
Keyword(s):  
High Intensity ◽  
Large Scale ◽  
Geological Survey ◽  
Large Impact ◽  
Well Log ◽  
Quaternary Sediments ◽  
Quaternary Deposits ◽  
Shallow Subsurface ◽  
Good Agreement ◽  
Related Morphology

Glaciotectonic deformation has a large impact on the stratigraphical and lithological variability of Quaternary deposits and the shallow subsurface pre-Quaternary sediments. Mapping of the distribution of glaciotectonic deformation involving pre-Quaternary and interglacial deposits has been carried out, and the density of glaciotectonic deformation analysed, on the basis of data from the well database ZEUS, at the Geological Survey of Denmark. Glaciotectonic deformation is widespread in Denmark. It is recognised in glacial terrains within morphological well-defined glaciotectonic complexes, and in areas with no obvious glaciotectonic related morphology as well as in areas covered with postglacial deposits. The dislocated bedrock is usually not transported for long distances, although rafts of pre-Quaternary bedrock may be transported up to 50 km or more. On a large scale, regions have been located showing high intensity of glaciotectonic deformation. Some of these regions are in good agreement with records from exposures and the geomorphology, others cannot be recognised without well log information.

scholarly journals Palynologic and Lithostratigraphic Research of Lacustrine, Marsh and Fluvial Quaternary Deposits in Rašica Dolina and Mišja Dolina, and on Radensko Polje

Hacquetia ◽  
2007 ◽  
Vol 6 (1) ◽  
pp. 91-101
Author(s):  
Metka Culiberg ◽  
Stevo Dozet
Keyword(s):  
Pollen Analysis ◽  
Carbonate Rocks ◽  
Middle Pleistocene ◽  
Quaternary Sediments ◽  
Quaternary Deposits ◽  
Lithostratigraphic Units ◽  
Lacustrine Clay ◽  
Bottom To Top

Palynologic and Lithostratigraphic Research of Lacustrine, Marsh and Fluvial Quaternary Deposits in Rašica Dolina and Mišja Dolina, and on Radensko Polje The article deals with the results of palynological and stratigraphical research of lacustrine, marsh and fluvial Quaternary deposits in the Rašica dolina and Mišja dolina, and on Radensko polje. Correlation with equivalent Quaternary deposits and their palynoflora from the Grosuplje polje area was also performed. In the study area, Mesozoic, predominantly carbonate rocks are transgressively covered by Quaternary deposits which are in general composed of five lithostratigraphic units (from bottom to top): 1. gravel, 2. grey lacustrine clay, 3. reddish brown loam, 4. light grey marly clay and 5. alluvial marsh deposits. On the basis of pollen analysis the Quaternary sediments of the study area are chronostratigraphically classified to the Late or Middle Pleistocene and Holocene.

scholarly journals Geomorphological characterization and mapping of Cartagena de Indias and adjacencies

2017 ◽  
pp. 5-15
Author(s):  
Max Furrier ◽  
Germán Vargas Cuervo ◽  
Cristian Camilo Moncada
Keyword(s):  
Point Of View ◽  
Field Observations ◽  
Central Theme ◽  
Quaternary Sediments ◽  
Quaternary Deposits ◽  
Spatial Characteristics ◽  
Cenozoic Tectonics ◽  
Geological Formation ◽  
Cartagena De Indias

This work involves a geomorphological characterization of the topographic chart 23 III D, produced by IGAC, in which were developed thematic mappings and other cartographic products where the relief, both, in its morphology and its morphometric and spatial characteristics were the central theme. From the geomorphological point of view, the area in question is located on the Sinú Belt and the unconsolidated Quaternary sediments. Sinú Belt, which oldest geological formation is dated as Oligocene-Miocene, presents the highest altitudes in the mapped area reaching 146 meters in the Cerro La Popa. The lower levels of the relief in the area are the unconsolidated Quaternary deposits, which altitudes do not go over 20 meters. From mapping surveys, interpretation of orbital images, field observations and the integration of the interpretation obtained, it can be concluded that the Cenozoic tectonics is the most important setting factor in the morphological shape of the area.

scholarly journals Quasielastic neutron scattering with in situ humidity control: Water dynamics in uranyl fluoride

2016 ◽  
Vol 119 (9) ◽  
pp. 094308 ◽  
Author(s):  
A. Miskowiec ◽  
M. C. Kirkegaard ◽  
K. W. Herwig ◽  
L. Trowbridge ◽  
E. Mamontov ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Water Dynamics ◽  
Humidity Control ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering ◽  
Control Water

scholarly journals SEDIMENTOLOGI DAN STRATIGRAFI HOLOSEN DATARAN PANTAI MEDAN - BELAWAN SEKITARNYA, SUMATERA UTARA

2016 ◽  
Vol 5 (2) ◽  
Author(s):  
Herman Moechtar ◽  
Herman Mulyana ◽  
Indyo Pratomo
Keyword(s):  
Sea Level ◽  
Coastal Plain ◽  
Depositional Environment ◽  
Depositional Environments ◽  
Quaternary Sediments ◽  
Quaternary Deposits ◽  
Vertical Variation ◽  
The North ◽  
Global Events ◽  
Channel Deposit

Studi sedimentologi dan stratigrafi endapan Kuarter di dataran pantai Medan – Belawan dibedakan menjadi enam lingkungan pengendapan. Yaitu endapan-endapan rawa, laut, pantai, rawa bakau, dataran banjir, dan alur sungai. Berdasarkan korelasi perubahan lingkungan pengendapan secara lateral dan vertikal, rangkaian sedimen Kuarter tersebut dapat dibedakan menjadi empat Interval Pengendapan (I – IV). Setiap interval dicirikan oleh berubahnya lingkungan yang dikontrol oleh perubahan iklim dan muka laut Holosenl. Perkembangan dari endapan Kuarter dan pengisisan cekungan cekungan di daerah dataran pantai Medan – Belawan dipengaruhi oleh peristiwa global. Perubahan dari sirkulasi iklim dan turun naiknya muka laut selama proses pengendapan berlangsung adalah berkaitan dengan perisitiwa global tanpa dipengaruhi oleh efek tektonik. Studi yang dilakukan mencakup analisis sedimentologi dan stratigrafi terhadap empat belas pemboran yang dilakukan di sepanjang lintasan yang berarah utara – selatan dari Medan hingga Belawan. Kedalaman pemboran berkisar antara 5,0 hingga 15,0 m.Kata Kunci: Sedimentologi dan stratigrafi, Holosen, dataran pantai Studies of sedimentology and Stratigrafi on Quaternary deposits in the coastal plain of Medan– Belawan surroundings, North Sumatera revealed six depositional environments. These are swamp, marine, beach, marsh, floodplain, and channel deposit environments. Based on the correlation of the lateral and vertical variation of the depositional environment, whereas the successsion of the Quaternary sediments can be divided into four sedimentary intervals (I – IV). Each interval is typically for environment changes which is controlled by sea level and climatic especially during Holosen. The development of the Quaternary sediments and basin fill in the coastal plain of Medan to Belawan area was influenced by global events. Changes in climatological and relative sea level during during depostional processes were included clobal changes without influenced by tectonic. The study was based on analyses of sedimentology and stratigraphy of fourteen borehole information obtained along the North to South traverse from Medan to Belawan. The penentration of the bore head varied from 5.0 to 15.0 m. Keywords: Sedimentology and stratigraphy, Holosen, coastal plain

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