The Stability of Upper Bound Analysis of Soft Rock Tunnel Faces Under Different Underground Water Levels

2021 ◽  
Author(s):  
Dao-bing Zhang ◽  
Jin Jiang ◽  
Jia-hua Zhang
Keyword(s):  
Upper Bound ◽  
Soft Rock ◽  
Underground Water ◽  
Water Levels ◽  
Upper Bound Analysis ◽  
The Stability ◽  
Rock Tunnel ◽  
Bound Analysis

Judgement Method for Surrounding Rock Stability of Guanjiao Tunnel Based on Catastrophe Theory

2011 ◽  
Vol 90-93 ◽  
pp. 2307-2312 ◽  
Author(s):  
Wen Jiang Li ◽  
Su Min Zhang ◽  
Xian Min Han
Keyword(s):  
Plastic Strain ◽  
Catastrophe Theory ◽  
Soft Rock ◽  
Surrounding Rock ◽  
In Situ Monitoring ◽  
Engineering Practice ◽  
Stability Of Surrounding Rock ◽  
The Stability ◽  
Rock Tunnel

The stability judgement of surrounding rock is one of the key jobs in tunnel engineering. Taking the Erlongdong fault bundle section of Guanjiao Tunnel as the background, the stability of surrounding rock during construction of soft rock tunnel was discussed preliminarily. Based on plastic strain catastrophe theory, and combining numerical results and in-situ data, the limit displacements for stability of surrounding rock were analyzed and obtained corresponding to the in-situ monitoring technology. It shows that the limit displacements obtained corresponds to engineering practice primarily. The plastic strain catastrophe theory under unloading condition provides new thought for ground stability of deep soft rock tunnel and can be good guidance and valuable reference to construction decision making and deformation managing of similar tunnels.

Upper-Bound Analysis

Metal Forming ◽  
2012 ◽  
pp. 110-127
Author(s):  
William F. Hosford ◽  
Robert M. Caddell
Keyword(s):  
Upper Bound ◽  
Upper Bound Analysis ◽  
Bound Analysis
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