In order to satisfy contemporary urban development requirements, it is essential to utilize urban underground space (UUS) effectively when planning new metropolitan subway (metro) stations, especially in commercial areas. Herein, two cases involving metro stations in commercial areas, the Xujiahui zone in Shanghai, China and the Namba zone in Osaka, Japan, are investigated with respect to lan…
Ruang Koleski Umum Rak: 2
Tunnelling underneath the existing tunnels are very common these days. It is obvious that the under-crossing tunnelling will affect and even damage the existing tunnels. An analytical method is proposed in this paper to better understand the effects of the under-crossing tunnelling on the existing tunnel. The existing tunnel is modeled as a Timoshenko beam lying on a Kerr foundation. The validi…
Resonant rubblization technology is often utilized to rehabilitate deteriorated condrete pavements. Vibrations induced by a resonant breaker would produce detrimental effects on lining structures in tunnel during rubblization construction. The in-situ experiments were carried out in Yangjiao Mountain Tunnel in Zheijiang Province, China. First, the characteristics of rubblization-induced vibrati…
The resonance rubblization technology can be adopted to reconstruct old concrete pavement and eradicate reflection cracking. This method fractures pavement into fragments quickly and directly casts asphalt on fractures, shortening time cost of reconstruction. Previous studies about this technology mainly concentrated on asphalt-casting methods, and the quality, stiffness, and flatness of reco…
Two centrifuge model tests with different vertical clearances were carried out to investigate the new shield tunneling on an existing overlying large-diameter tunnel. The difference of the two centrifuge model tests lies in different vertical clearance between the two tunnels. Two construction steps of a new shield tunnel were simulated in the test. The vertical displacement and the longitudina…
Proceedings of the 9th Road Engineering Association of Asia and Australasia Conference (REAAA), volume 2