Geology and the London Underground
Author: Paul, Jonathan D.
Source: Geology Today, Volume 25, Number 1, January/February 2009 , pp. 12-17(6)
Abstract:Geology as a whole is the main influence on determining the feasibility of tunnelling for underground railways, and at what cost. Favourable conditions encouraged the early development of a network, significantly alter the methods used for construction, and are what form the tunnels, in terms of horizontal and vertical alignment. Local geology is shown, by means of two cross-sections following the tunnels, to be more important than the overall regional geology, where the underlying strata exhibit pronounced variations in permeability, and so mechanical properties. Geological complexities specific to the area of tunnelling generate problems during construction, but lead to technological innovation in the long term and a better understanding of local stratigraphy. As the result of this, and the increase in the quality of preliminary surveys, we are increasingly able to tunnel in areas previously considered treacherous.
Document Type: Research Article
Affiliations: Department of Earth Science & Engineering, Imperial College, London SW7 2AZ, UK, Email: email@example.com
Publication date: January 1, 2009