Engineering geological and geomicrobiological factors of subway tunnels’ stability in St. Petersburg

2013 ◽  
pp. 523-529
Author(s):  
R Dashko ◽  
P Kotyukov
Keyword(s):  
Subway Tunnels

scholarly journals Method of Calculating the Compensation for Rectifying the Horizontal Displacement of Existing Tunnels by Grouting

2020 ◽  
Vol 11 (1) ◽  
pp. 40
Author(s):  
Yongjie Qi ◽  
Gang Wei ◽  
Feifan Feng ◽  
Jiaxuan Zhu
Keyword(s):  
Volume Expansion ◽  
Soil Layer ◽  
Horizontal Displacement ◽  
Soil Mass ◽  
Calculation Model ◽  
Additional Stress ◽  
Corrective Effect ◽  
Engineering Data ◽  
Subway Tunnels ◽  
Good Agreement

Sleeve valve pipe grouting, an effective method for reinforcing soil layers, is often employed to correct the deformation of subway tunnels. In order to study the effect of grouting on rectifying the displacement of existing tunnels, this paper proposes a mechanical model of the volume expansion of sleeve valve pipe grouting taking into consideration the volume expansion of the grouted soil mass. A formula for the additional stress on the soil layer caused by grouting was derived based on the principle of the mirror method. In addition, a formula for the horizontal displacement of a tunnel caused by grouting was developed through a calculation model of shearing dislocation and rigid body rotation. The results of the calculation method proposed herein were in good agreement with actual engineering data. In summary, enlarging the grouting volume within a reasonable range can effectively enhance the grouting corrective effect. Further, with an increase in the grouting distance, the influence of grouting gradually lessens. At a constant grouting length, setting the bottom of the grouting section at the same depth as the lower end of the tunnel can maximize the grouting corrective effect.

Groundwater decrease and contamination around subway tunnels in a coastal area of Busan City, Korea

2021 ◽  
Vol 80 (17) ◽  
Author(s):  
Tae Hyung Kim ◽  
Sang Yong Chung ◽  
Venkatramanan Senapathi ◽  
Selvam Sekar ◽  
Hussam Eldin Elzain
Keyword(s):  
Coastal Area ◽  
Subway Tunnels

Onsite measurement and performance analysis of capillary heat pump system used in subway tunnels

2021 ◽  
pp. 118008
Author(s):  
Zhen Tong ◽  
Yiming Guan ◽  
Tingtao Cao ◽  
Yongming Ji ◽  
Songtao Hu ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
And Performance ◽  
Subway Tunnels

Establishment of Evaluation System for Concrete Repair Materials Suitable for Subway Tunnels

2020 ◽  
Vol 58 (8) ◽  
pp. 589-596
Author(s):  
M. Taguchi ◽  
N. Ogura ◽  
H. Ueda ◽  
T. Kishi
Keyword(s):  
Evaluation System ◽  
Concrete Repair ◽  
Repair Materials ◽  
Subway Tunnels

Numerical simulation of fire smoke in extra-long river-crossing subway tunnels

2018 ◽  
Vol 82 ◽  
pp. 82-98 ◽  
Author(s):  
Xinxin Guo ◽  
Xuhai Pan ◽  
Zhilei Wang ◽  
Juan Yang ◽  
Min Hua ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Fire Smoke ◽  
Subway Tunnels
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