The SHPB experimental device was adopted to carry out the uniaxial impact tests in studying failure characteristics of combination surrounding rocks and primary support for tunnel, so as explore key factors affecting its dynamic strength deforming properties. To simplify practice model tunnel construction, specimens combined by rock were simulated concentric annular sandstone cement mortar this...

On the basis of analyzing engineering geological conditions inlet slope diversion tunnel on left bank a hydropower station in Jinsha River, overall three-dimensional generalized model is established according to and topographic data during construction period. According excavation support scheme, displacement, stress, strength reserve safety factor after all are calculated simulated under exist...

The main objective of this study was to investigate the performance of a roadheader used for the excavation of Küçüksu Sewage Tunnel having a length of 1037.52 m. The tunnel is located in Anatolian part of Istanbul and constructed by STFA for Istanbul Water and Sewerage Administration (ISKI). Detailed statistical analysis showed that net advance rate of the roadheader is directly influenced by ...

In tunnel excavation with boring machines, the face is supported to avoid collapse and minimise settlement. This article proposes use of reinforcement learning, specifically deep Q-network algorithm, predict support pressure. The algorithm uses a neural network make decisions based on expected rewards each action. approach tested both analytically numerically. By using soil properties ahead ove...

When a vehicle equipped with an artificial vision system enters or exits a tunnel, the camera may temporarly suffer from reduced visibility, or even get completely blind due to quick changes in enviromental illumination. This paper presents a vision-based system that detects approaching tunnels entrances or exits. The proposed system allows other ADAS (Advanced Driver Assistance Systems) to act...

There are many kinds of public transportation systems, e.g. Xue-shan tunnel, high-speed railway, and airport shuttle are developed in Taiwan recently. The risk hidden in the space of long road tunnel could cause serious life loses and transportation system damage. Therefore, how to prevent and decrease the impact of disaster should be considered for the disaster precaution and security manageme...