The Experts below are selected from a list of 21399 Experts worldwide ranked by ideXlab platform

Charles I Malme - One of the best experts on this subject based on the ideXlab platform.

Walter H Pearson - One of the best experts on this subject based on the ideXlab platform.

John R Skalski - One of the best experts on this subject based on the ideXlab platform.

Martijn Van Leusen - One of the best experts on this subject based on the ideXlab platform.

  • Wroxeter hinterland project and Geophysical Survey at Wroxeter
    Archaeological Prospection, 2000
    Co-Authors: Simon Buteux, Vincent Gaffney, R. H. White, Martijn Van Leusen
    Abstract:

    This paper provides the overall archaeological context of a Geophysical Survey carried out at the Roman town at Wroxeter, including both excavation carried out within the town and Survey and excavation within its hinterland. The Geophysical Survey at Wroxeter was carried out within the remit of the Wroxeter Hinterland Project. The archaeological rationale behind this project is explained and the contribution of Geophysical Survey data to achieving the goals of this project is discussed. Copyright © 2000 John Wiley & Sons, Ltd.

Manuel Cueto - One of the best experts on this subject based on the ideXlab platform.

  • karst induced sinkhole detection using an integrated Geophysical Survey a case study along the riyadh metro line 3 saudi arabia
    Near Surface Geophysics, 2018
    Co-Authors: Manuel Cueto, Javier Olona, Gabriela Fernandezviejo, Luis Pando, Carlos Lopezfernandez
    Abstract:

    Nowadays, most planned large infrastructure projects increasingly use multi-technique Geophysical methods integrated with geotechnical Surveys to assess detection and exploration of karst-related systems. This article focuses on the case of a large sinkhole found during the Geophysical Surveys that were carried out along Riyadh’s new Metro Line 3 (Saudi Arabia). This line is the longest (41 km) of the six that are currently under construction in the framework of the largest public rail infrastructure project, the Riyadh Metro Project (176 km). A multi-technique Geophysical Survey combining seismic (1040 m of seismic refraction tomography and four downhole tests), electrical (1035 m of electrical resistivity tomography), and electromagnetic methods (1040 m of ground penetration radar) was conducted to shed light on the subsurface geology along the section of this case study. The combination of the Geophysical methods led to early identification of a subsurface area of lower resistivity and seismic velocity than the background values of the carbonate bedrock. It also revealed smaller fractures that could lead to future sinkhole formation. A subsequent dense investigatory borehole grid (14 boreholes, five probeholes, 38 standard penetration tests, nine TV-logging, and five pressuremeter tests) further confirmed the presence of a buried sinkhole. This paper shows the results of each individual Geophysical method as well as the final geotechnical interpretation based on the combination of Geophysical methods with borehole drilling. It concludes that the use of a single method for karst assessment, whether a Geophysical method or borehole drilling, does not allow a sufficiently detailed geotechnical profile of the ground. This case study provides basic guidance on the most suitable and accurate techniques to detect similar karstic features across Riyadh.

  • Geotechnical Modelling of the Riyadh Metro Line 3 Using Multi-technique Geophysical Survey
    Near Surface Geoscience 2016 - 22nd European Meeting of Environmental and Engineering Geophysics, 2016
    Co-Authors: Manuel Cueto, S. Mayordomo, M. Martín, P. De La Puente, J. Olona, Daniel Arias
    Abstract:

    The Riyadh Metro Project is currently the largest public rail infrastructure project in the world under implementation. Metro will become the backbone of the city's public transport, significantly improving the life quality of citizens. We helped to carry out an exhaustive Geophysical Survey along the entire corridor of the Riyadh’s Metro Line 3. Among all the six Lines that the System comprises, Line 3 is the longest. It runs along 42 km, of which we identified about 13 km long underground sections (TBM EPBS and cut and cover) and 11 underground stations (cut and cover). The Geophysical Survey comprised a variety of field tests: seismic refraction, electrical resistivity tomography, ground penetration radar and seismic tests in boreholes (downhole and cross-hole testing). We correlated the results of the Geophysical Surveys with data coming from geological, hydrogeological and geotechnical investigations. This way, we delivered a continuous subsurface profile, which became the raw data for developing a full detailed geotechnical and hydrological model for the Line 3. The said model anticipated potential geotechnical risks (layers owning poor engineering parameters, karstic areas, faults or weaker rock volumes within the rock mass). Then, mitigations helped achieving, reliable, durable, safe and efficient designs and construction works.