A Modular Calculation Method for the Carbon Emissions of Highway Tunnel Construction Based on the Chinese Standard Quota

2021 ◽  
pp. 81-106
Author(s):  
Jianfeng Xu
Keyword(s):  
Carbon Emissions ◽  
Calculation Method ◽  
Tunnel Construction ◽  
Highway Tunnel ◽  
Chinese Standard

Loess Highway Tunnel Construction Process of Three Dimensional Numerical Simulation

2012 ◽  
Vol 256-259 ◽  
pp. 1276-1279
Author(s):  
Bai Liu ◽  
Bin Zhang ◽  
Jing Kong ◽  
Jian Pang
Keyword(s):  
Three Dimensional ◽  
Shanxi Province ◽  
Tunnel Construction ◽  
Western Region ◽  
High Grade ◽  
Construction Process ◽  
Construction Technique ◽  
Loess Area ◽  
Highway Tunnel ◽  
Deformation Law

In recent years, as China's national sustained and rapid economic development, the state increased investment to middle-western region, promote the regional development of high grade highway. Therefore, highway tunnel through loess area is getting more and more. Due to the special physical properties of loess, it makes the loess tunnel construction a hot topic. To study on the deformation law of the loess highway tunnel, this paper based on the Shanxi Province Guang Ling to Hun Yuan highway tunnel—East Fu Yao tunnel, we simulate the whole section pre-reinforcement construction technique for three dimensional numerical, and combined with field monitoring measurement to compare and analyze in paper

Evaluation of ground loss ratio with moving trajectories induced in double-O-tube (DOT) tunnelling

2018 ◽  
Vol 55 (6) ◽  
pp. 894-902 ◽  
Author(s):  
Dong-Jie Ren ◽  
Shui-Long Shen ◽  
Arul Arulrajah ◽  
Huai-Na Wu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Calculation Method ◽  
Tunnel Construction ◽  
Loss Ratio ◽  
Ground Settlement ◽  
The Finite Element Method ◽  
Shield Tunnelling ◽  
Ground Loss ◽  
Shield Machine

This paper investigates the influence of moving trajectories on ground loss ratio (GRL) due to the double-O-tube (DOT) tunnelling method. DOT tunnelling has three moving trajectories: pitching, yawing, and rolling, which have different behaviours during tunnel construction compared with those from single circular shield tunnelling. These moving trajectories cause overexcavation during tunnelling. The calculation method of gap area between the DOT shield machine and linings is evaluated in this research. Based on the superposition concept, the modification equation of GLR is proposed, which takes both moving trajectory and grouting volume into consideration. A field DOT tunnelling case is analysed to determine the correlation between moving trajectories and ground settlement. The influence of tail grouting is discussed by adjusting the grouting volume in different periods. The finite element method is also employed by setting the modified ground loss ratio (GLR′) as the contraction increment of linings. Results from both the measured and simulated settlements verify the reasonability of the proposed equation and the effect of moving trajectories on ground loss.

The Grouting Technology of Large-Section Highway Tunnel in Water-Rich Karst Formations

2013 ◽  
Vol 838-841 ◽  
pp. 1441-1446
Author(s):  
Chao Yue Zhou ◽  
Yong Fang ◽  
Ya Peng Fu ◽  
Ge Cui
Keyword(s):  
Cross Section ◽  
Field Tests ◽  
Operation Technique ◽  
Tunnel Construction ◽  
Construction Technology ◽  
Large Cross Section ◽  
Large Section ◽  
Highway Tunnel ◽  
Grouting Materials

It is a challenge to deal with karst in the construction of large cross-section tunnel. Under the background of Shuangbei Highway Tunnel, a new kind of grouting technology is introduced. According to hydrogeology, field tests are carried out to select grouting materials and proportion of mixture. Combined with the project practice, grouting construction technology is discussed such as grouting equipments, grouting parameters, operation technique, grouting ending standards. It has been proved that the technology is effective in tunnel construction.

Monitoring Analysis on Tunnel Portal Shallow Burying Segment of Center Diaphragm Construction Method

2012 ◽  
Vol 238 ◽  
pp. 808-813
Author(s):  
Fei Zhou ◽  
Yong Li Xie ◽  
Jin Xing Lai
Keyword(s):  
Construction Method ◽  
Tunnel Construction ◽  
Ground Settlement ◽  
Normal Type ◽  
Highway Tunnel ◽  
Site Monitoring ◽  
Tunnel Monitoring ◽  
Tunnel Portal

Combined with highway tunnel monitoring measurement work of Bijia Mountain, the contents and methods of site monitoring and the analyzing methods for collected data of highway tunnel construction were studied. A comparative way was used to analyze the different curves of displacement with time on the two typical segments of ground settlement convergence and vault crown settlement. The result shows that the site monitoring curves of displacement with time can be divided into normal type and abnormal one. This article puts forward some feasible suggestions about how to guide the safe construction through the two types of curve. The aim of this article is to explore the changing of the abnormal curve before the dangerous accident occur, and give the causes of the reasonable analysis after collapse happened.

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