Semi-analytical solution for water inflow into a tunnel in a fault-affected area with high water pressure

2021 ◽  
Author(s):  
Helin Fu ◽  
Jie Li ◽  
Guowen Cheng ◽  
Pengtao An
Keyword(s):  
Analytical Solution ◽  
Water Pressure ◽  
High Water ◽  
Water Inflow ◽  
Affected Area ◽  
High Water Pressure

Gushing Water of a Deep Buried Long Tunnel under High Water Pressure and High Ground Stress

2013 ◽  
Vol 353-356 ◽  
pp. 1211-1214
Author(s):  
Ying Er Deng ◽  
Ting Yuan ◽  
Run Qiu Huang ◽  
Xiao Nong Hu ◽  
Xin Peng
Keyword(s):  
Water Pressure ◽  
High Water ◽  
Scientific Basis ◽  
Water Inflow ◽  
Volume Rate ◽  
Calculation Results ◽  
Ground Stress ◽  
Modulus Method ◽  
Coefficient Method ◽  
High Water Pressure

This paper focused on calculation of gushing water and evaluation of calculation methods. A groundwater runoff modulus method, a rainfall infiltration coefficient method and a groundwater dynamics method were used to calculate volume rate of water inflow of an ultra deep buried long tunnel under conditions of high water pressure and high ground stress (referred to as two high conditions). Results show that the more volume rate of water inflow occurs in a fault zone with fault gouge, a karst stratum zone and their combination zone. The calculation results by using modified Goodman formula have the highest precision. The results can provide prevention of gushing water of a deep buried long tunnel under the two high conditions with scientific basis.

Calculation Methods for Water Inflow from Typical Sections in a Long Deep Buried Tunnel

2014 ◽  
Vol 638-640 ◽  
pp. 880-883
Author(s):  
Ying Er Deng ◽  
Xin Peng ◽  
Long Chao Yan
Keyword(s):  
Water Pressure ◽  
High Water ◽  
Practical Experience ◽  
Scientific Basis ◽  
Water Inflow ◽  
Calculation Methods ◽  
Groundwater Dynamics ◽  
Calculation Results ◽  
Ground Stress ◽  
High Water Pressure

This paper focused on five kinds of methods for water inflow of typical sections in a long deep buried tunnel under conditions of high ground stress and high water pressure (referred to as “two high conditions”). The methods are based on groundwater dynamics formulae and practical experience. Results show that calculation data by the method 5 is the maximum. There is little difference of calculation results between the formulae 1 and 2 or between the formulae 3 and 5. The calculation methods and results of the water inflow can provide prevention of gushing water of a long deep buried tunnel under the two high conditions with scientific basis.

scholarly journals Structural modifications of lanthanum silicate oxyapatite exposed to high water pressure

2017 ◽  
Vol 37 (5) ◽  
pp. 2149-2158 ◽  
Author(s):  
Aénor Pons ◽  
Emilie Béchade ◽  
Jenny Jouin ◽  
Maggy Colas ◽  
Pierre-Marie Geffroy ◽  
...  
Keyword(s):  
Water Pressure ◽  
High Water ◽  
Structural Modifications ◽  
Lanthanum Silicate ◽  
High Water Pressure

scholarly journals Analysis on Water Inrush Process of Tunnel with Large Buried Depth and High Water Pressure

Processes ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 134 ◽  
Author(s):  
Weimin Yang ◽  
Zhongdong Fang ◽  
Hao Wang ◽  
Liping Li ◽  
Shaoshuai Shi ◽  
...  
Keyword(s):  
High Pressure ◽  
Model Test ◽  
Water Pressure ◽  
Water Inrush ◽  
High Water ◽  
Surrounding Rock ◽  
Karst Cave ◽  
Tunnel Excavation ◽  
Pressure Water ◽  
High Water Pressure

In order to explore the catastrophic evolution process for karst cave water inrush in large buried depth and high water pressure tunnels, a model test system was developed, and a similar fluid–solid coupled material was found. A model of the catastrophic evolution of water inrush was developed based on the Xiema Tunnel, and the experimental section was simulated using the finite element method. By analyzing the interaction between groundwater and the surrounding rocks during tunnel excavation, the law of occurrence of water inrush disaster was summarized. The water inrush process of a karst cave containing high-pressure water was divided into three stages: the production of a water flowing fracture, the expansion of the water flowing fracture, and the connection of the water flowing fracture. The main cause of water inrush in karst caves is the penetration and weakening of high-pressure water on the surrounding rock. This effect is becoming more and more obvious as tunnel excavation progresses. The numerical simulation results showed that the outburst prevention thickness of the surrounding rock is 4.5 m, and that of the model test result is 5 m. Thus, the results of the two methods are relatively close to each other. This work is important for studying the impact of groundwater on underground engineering, and it is of great significance to avoid water inrush in tunnels.

Plugging Performance Optimization Tests of Grouting Material for Sudden Water Inflow of Underground Engineering Construction

2011 ◽  
Vol 306-307 ◽  
pp. 722-726 ◽  
Author(s):  
Li Ping Li ◽  
Shu Cai Li ◽  
Jin Sheng Cui ◽  
Zhao Li
Keyword(s):  
Performance Optimization ◽  
Water Pressure ◽  
High Water ◽  
Water Inflow ◽  
Karst Area ◽  
Seepage Water ◽  
Underground Engineering ◽  
Grouting Material ◽  
New Type ◽  
Plugging Performance

Sudden water inflow is the typical geological hazard during the construction period of underground, especially for the karst area. According to a new type of polymer chemical grout material called Malisan, plugging performance optimization tests of different grouting material had been carried out, such as ordinary cement, superfine cement and special cement of HSC, the geo time, consolidating strength, anti-erosion property and comprehensive properties of grouting harnessing had been systematically analyzed and compared. Test results showed that the new type of polymer chemical grout material has the significant characteristics of controllable gel time, high consolidating strength, anti-scour performance, water swelling and extremely strong permeability, it is more effective than conventional grouting material for grouting harnessing of seepage, water spraying and water inflow with high water pressure, in addition, it is convenient for transportation, material configuration and process operation.

scholarly journals Study on Water Sealing Mechanism of Earth Pressure Balanced Shield Subject to High Water Pressure.

1996 ◽  
pp. 189-198
Author(s):  
Akimasa Waku ◽  
Hideharu Miyazawa ◽  
Hiroshi Yoshino ◽  
Syunsuke Sakurai
Keyword(s):  
Water Pressure ◽  
Earth Pressure ◽  
High Water ◽  
Sealing Mechanism ◽  
High Water Pressure
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