ABSTRACT
In Tokyo Metropolis, the rehabilitation and renewal of sewer systems is an urgent issue due to the aged sewers and increases in wastewater and stormwater runoff. Generally, shield tunneling confronts various problems, such as high construction costs, adverse effects on living environments, and densely used surface and underground spaces. Based on such backgrounds, the authors developed a new shield tunneling method, which is called the “Compact shield tunneling method” that is effective for constructing such main sewers. This paper describes the outline of this newly developed tunneling method and reports the actual execution on site.
