Direktorat Jenderal Bina Marga (DJBM) atau Dinas PU terkait pelaksanaan penyelenggaraan jalan sesuai dengan peraturan pemerintah No 34 Tahun 2006 tentang jalan memerlukan acuan dalam memilih tipe pengadaan khususnya dalam pembangunan jalan. Acuan sangat penting agar pembangunan jalan dapat memenuhi tiga prinsip: 1) Tepat waktu, 2) Tepat kualitas, 3) Tepat biaya, untuk memudahkan dalam memiih ti…
The cutter ring breakage as a cutter failure mode in shield tunnel construction is more likely to occur in the centre zone of cutterhead. Given the inconsistence of this phenomenon with the linear cutting theory, the present paper suggests the use of the circular cutting theory to explain the cutter ring breakage and find the correlation between the unbalanced side force and cutter ring breakag…
50 MW heat release rate fire is the most representative in tunnel fire. The paper has a systematic study on the temperature distribution and thermal damage of the maximum temperature section with a heat release of 50 MW by means of theoretical analysis, numerical simulation and experimental investigations. Research results show that with the increase of ventilation velocity, the maximum tempe…
Taking jiangluling tunnel as an example, a numerical model for investigating the evolution of the frost penetration and ablation in the surrounding rock of cold region tunnels is presented based on the governing equations of the coupling problem of temperature and air flows in, cold region tunnels. As the tunnel starts to operate and cold air flows in, frost penetration stars. The thawed permaf…
The Tunnel Boring Machine (TBM) technology has significant advantages over conventional Drill & Blast method, and it has become one of the most common tunnel excavation methods in the world. However, weaknesses of TBM such as the poor adaptability to complex geological conditions create a bottleneck in its functionality, and restrict its further development. Therefore, factors such as engineeri…
Taking Jiangluling tunnel as an example, a numerical model for investigating the evolution of the frost penetration and ablation in the surrounding rock of cold region tunnels is presented based on the governing equations of the coupling problem of temperature and air flow fields in cold region tunnels. As the tunnel starts to operate and cold air flows in, frost penetration starts. The thawe…
Internal explosions in underground spaces can lead to enormous economic losses and cause security hazards to society. Therefore, understanding the dynamic response of embedded tunnels to explosions is extremely important. Using the theory of elastic media, we studied the three-dimensional transient dynamic responses of coupled soil-lined systems under blast loads. First, general solutions for…
The deformation and stress of a super-large-diameter shield tailskin are analyzed in this paper. Four kinds of structure analysis models, i.e. the perfect solid shell model, the defected solid shell model, the perfect hollow-layered shell model, and the defected hollow-layered shell model are formed to study the effects of initial geometrical defects and the hollow-layered shell formation on th…
Home Proceedings of GeoShanghai 2018 International Conference: Tunnelling and Underground Construction Conference paper Analysis and Application Exploration of Smoothed Particle Hydrodynamics (SPH) for Non-circular Shield Tunneling Peinan Li, Jun Liu, Yixin Zhai & Wenqi Ding Conference paper First Online: 05 May 2018 Abstract Cutting stirring and synchronous grouting is direct interact…
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…