THE TRANS-TOKYO BAY HIGHWAY PROJECT - A HUGE PROJECT CURRENTLY UNDER CONSTRUCTION

This paper reports first the background of the decision to construct the Trans-Tokyo Bay Highway, and then describes the functions and benefits of such a project. It is explained that the highway project is located under very difficult design conditions by virtue of its position in the centre of the heavily utilized Tokyo Bay, and from social factors. In order to solve the important problems related to safety of shipping, preservation of the environment, and construction under deep water in soft ground in an area subject to frequent earthquakes, the basic structural form was determined using the techniques of shield tunnelling and diaphragm walling. Yet, many problems remain with the various structures involved, and further repeated experimentation and testing is being made to develop new construction methods and techniques in order to realize the project. Along with a description of the structure and construction methods used, the various measures taken in terms of new processes and techniques against various problems are stated. In particular, a detailed account is given of the newly developed man-made embankment fill and low-strength type ground improvement methods, both using cement-treated sand, employed in order to ensure the safety of the shield tunnel excavation. (A) For the covering abstract see IRRD 873033.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 57-87

Subject/Index Terms

Filing Info

  • Accession Number: 00712375
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 90-5410-343-4
  • Files: ITRD
  • Created Date: Oct 24 1995 12:00AM