Construction Technology of Cangyuan Tunnel of LanYu Railway

Abstract

The phenomenon of railway and road tunnel passing through the debris flow gully is more and more prevalent, for the rapid development of the construction of railways and highways. At present, the construction experience of tunnels passing through the debris flow gully is not rich enough, so the study on this part is necessary. The engineering geological conditions of Cangyuan Tunnel are complex and the construction of which is difficult. The three-step seven-step method, tunnel surface grouting and tunnel root piles reinforcement basis are used to ensure the stability of the tunnel surrounding rock, based on the characteristics of Cangyuan Tunnel which passes through the debris flow gully. The deformation is controlled within the specification range, which indicates that the construction effect of Cangyuan Tunnel is good. These construction measures solve the construction problems of tunnels which pass through the debris flow gully and ensure project quality and duration, therefore, these construction measures can be used in similar projects.

Oxygen enrichment and its application to life support systems for workers in high-altitude areas

“…In China, the majority of the Qinghai-Tibet railway tunnels are in areas above 4000 m, and most high-altitude mines are between 3000 and 3500 m. Therefore, addressing the low-oxygen concentration in air is crucial for the development of tunnels and mines. [10][11][12][13] In addition, the technology for oxygen enrichment in high-altitude areas over 4000 m has rarely been researched. In the past, high-altitude workers were required to use oxygen cylinders, as was the case during the construction of the Qinghai-Tibet highway.…”

Numerical Simulation of Mechanical Behavior in Pier Formwork Problem

“…Model.This model is built by ABAQUS6.13 simulation software. All dimensions and parts location are established in accordance with the given template design [2] (mm), and unimportant parts are omitted. This structure is a symmetrical structure, so we create the half of template.…”

Study on Seismic Properties of Assembled Monolithic Metro Station Based on Response Deformation Method

“…In recent years, frequencies and magnitudes of worldwide earthquakes increased markedly, which make seismic researches and designs of underground structures even more prominent. Thus specific Chinese Norms [10][11][12] went into effect in the last few years, with the response deformation method [13][14][15] recommended for seismic calculation and design of metro station. With great application potential, seismic properties of assembled monolithic metro station should be understood.…”