Results 131 to 140 of about 31,564 (295)
Single-parameter non-adiabatic quantized charge pumping
, 2007 Controlled charge pumping in an AlGaAs/GaAs gated nanowire by single-parameter modulation is studied experimentally and theoretically. Transfer of integral multiples of the elementary charge per modulation cycle is clearly demonstrated.
B. Kaestner +11 more
core +1 more source
Deep Underground Science and Engineering, EarlyView.The evolution of the temperature field and frozen wall under different fracture conditions was examined by an artificial ground freezing‐based thermal‐hydraulic coupled model. It was observed that fracture inclination affects the interaction extent of freezing pipes and fracture, while phase transition extent is the dominant factor for heat transfer in
Chenyi Zhang +9 more
wiley +1 more source
Experience in Construction in Hard Rock with Roadheader in the Ariz -Basauri section of the Bilbao Metro [PDF]
, 2010 The object of the works to be performed is the extension of the Bilbao Metro network (Vizcaya, Basque Region, Spain). The Ariz-Basauri section of line 2 of the Bilbao Metro is being performed by the UTE Ariz-Basauri, a joint venture formed by the ...
Gullon Buceta, Alonso A., Pacios, P.
core
Deep Underground Science and Engineering, EarlyView.A novel shear‐lag model, validated by pull‐out tests, incorporates a constant bond stress stage to predict the complete load–displacement response of grouted rock bolts, providing a new tool for optimizing anchorage length and material toughness in deep underground engineering. Abstract The stability of rock masses in deep underground excavations, such
Wenhui Bian +6 more
wiley +1 more source
Numerical Study on the Effect of Tunnel Slope on Smoke Exhaust Performance in Metro Tunnels
FireUtilizing the intermediate air shaft for smoke exhaust is one of the crucial emergency ventilation methods in metro tunnel fires. To study the impact of metro tunnel slope on smoke exhaust performance of intermediate air shaft, this paper employs ...
Yuxuan Yang, Qianbo Zhang
doaj +1 more source
Policy and planning for large infrastructure projects : problems, causes, cures [PDF]
This paper focuses on problems and their causes and cures in policy and planning for large infrastructure projects. First, it identifies as the main problem in major infrastructure development pervasive misinformation about the costs, benefits, and risks
Flyvbjerg, Bent
core
Deep Underground Science and Engineering, EarlyView.An analytical framework delivers a closed‐form stress solution for lined compressed air energy storage chambers, enabling the determination of the minimum safe burial depth. The solution quantitatively evaluates lining support effectiveness, offering a reliable tool for chamber design and optimization.
Zeyuan Sun +3 more
wiley +1 more source
Train-Induced Unsteady Airflow in a Metro Tunnel with a Ventilation Shaft
Applied SciencesTo ensure only one train operates in each ventilation section within an extra-long tunnel, a ventilation shaft was typically installed to divide the entire tunnel into multiple sections.
Fei Wang +4 more
doaj +1 more source
Investigating the effect of tunnelling on existing tunnels [PDF]
, 2015 A major research project investigating the effect of tunnelling on existing tunnels has been completed at Imperial College London. This subject is always of great concern during the planning and execution of underground tunnelling works in the urban ...
Afshan, S +8 more
core
Failure Mechanism of Asymmetric Large Deformations Under Repeated Mining in Roadways
Energy Science &Engineering, EarlyView.Principal stress‐evolution diagram at different advance positions of 42205 working face. ABSTRACT To address the challenge of controlling severe asymmetrical deformation in roadways subjected to repeated mining, this study (i.e., based on the engineering context of the Buertai Coal Mine) investigated the characteristics of the regional stress field in ...
Ai‐Rong Wang +3 more
wiley +1 more source