وضعیت و فناوری کنونی روش تونل زنی با سپر در ژاپن Present status and technology of shield tunneling method in Japan
- نوع فایل : کتاب
- زبان : انگلیسی
- ناشر : Elsevier
- چاپ و سال / کشور: 2017
توضیحات
رشته های مرتبط مهندسی عمران
گرایش های مرتبط سازه
مجله تونل زنی و تکنولوژی فضای زیرزمینی – Tunnelling and Underground Space Technology
دانشگاه Railway Technical Research Institute, Tokyo, Japan
نشریه نشریه الزویر
گرایش های مرتبط سازه
مجله تونل زنی و تکنولوژی فضای زیرزمینی – Tunnelling and Underground Space Technology
دانشگاه Railway Technical Research Institute, Tokyo, Japan
نشریه نشریه الزویر
Description
1. Introduction The shield tunneling construction method was adopted for the first time in urban areas of Japan for a subway project in Nagoya City during the latter half of the 1950s. Open face and hand mining methods, along with air compression pressure, were used in the shield tunneling. After that, the slurry method was developed in the earlier half of the 1970s. The earth pressure balanced method was also put into practical use in the latter half of the 1970s. It was then possible to maintain the stability of the face in an extremely soft clay ground; this had not been previously possible even when using a supplementary method. In addition, a new grouting material, which can harden immediately and maintain plasticity, was developed during the same period for backfill grouting. A new tail seal, which consists of a wire brush and special high viscose grease, was developed. Thus, the shield tunneling method was not only employed for the excavation of tunnels, but it also could control ground movements. Recently, it has often become necessary to construct tunnelsunder severe conditionsand to develop new techniques. However, present design techniques cannot appropriately reflect the construction techniques; and thus, traditional methods are still often used. Therefore, innovationsin design techniquesare needed. Thispaper presents an outline of the shield tunneling technique presently used in Japan, and new design techniques.
