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Abstract: This study proposes a new construction method for constructing a small section structure under railway tracks by non-open cut method.This method has the following 3 characteristics; 1) Ground surface displacement is reduced by a ground cutting wire saw in front of the cutting edge. 2) Attitude control jacks between the cutting edge and precast concrete boxes achieves detailed excavation...
Abstract: Apart from development in machine technology and other cross sectional tunnel shapes, the alternative lining systems. It has carried out as well, in early sixties in the former Soviet Republic experiments were carried out with tunnel lining without any joints [1] after excavation; the soil was replaced by in site poured concrete lining. At the end of the seventies and beginning of the eighties...
Abstract: This paper discusses a very unique research including the design and testing of the compressible type gaskets for steel segments, which has not been studied much in the field of the TBM tunneling. Over the course of developing the design of segments of steel rings or flexible rings of the bored tunnels for Eurasia Tunnel, it was discovered that gaskets do not have sufficient space to expand...
Abstract: Tokyo Metro Co. Ltd. operates 9 routes in Capital area of Japan; total length of tunnels is 1.66 km. In Japan, subway tunnels were constructed by the cut & cover method and have typically horizontally oriented double cell box tunnels with rectangular cross sections. Because some tunnels had to be built under narrow roads in Tokyo, there exist some vertically oriented double cell box tunnels...
Abstract: The Metro Line 4 of phase 1 passes through about 17.0 km underground, it had to choose in the design between a few alternative solutions due to the tight implementation time schedule, the route. The selected solution was to reduce the level of the alignment by excavating and breaking through the two groups of working piles under the main street, which is the...
Abstract: Tunnel Boring Machine (TBM) tunnelling projects in hard and abrasive rock pose different challenges compared with those in soft ground. One of the challenges is the determination of penetration rate of tunnelling and the design of TBM cutter with respect to anticipated ground condition. There is little published information on slurry TBM performance in granitic rock. Two 7.45m dia. slurry TBMs...
Abstract: Nowadays, more precise control method on face pressure of slurry shield is beingadopted, combining air pressure control at the upper part of an air chamber with conventional slurry flow control. To grasp the feature and the control method of the air combined system, a prototype test was carried out using the model, which is composed of a cutter chamber, an air chamber, a slurry circulation...
Abstract: Tokyo Metro Co. Ltd. operates 9 routes in Capital area in Japan, total length of the routes is 195.1km. The total length of tunnels is 166km.In Japan, subway tunnels constructed by the open-cut method are typically horizontally oriented double cell box tunnels with rectangular cross sections. The open-cut method involves excavating parts of public roads, installing tunnel frames in place and...
Abstract: This project involves renovating Minami-sunamachi station on the Tokyo Metro Tozai Line, by converting a single island platform with two tracks into two island platforms with three tracks to eliminate train delays and alleviate congestion during rush hours. Moreover, station facilities, escalator and elevator devices are also relocated to improve passenger flow. This Station was constructed by...