Effect of drainage facilities using 3D seepage flow analysis reflecting hydro-geological structure with aspect cracks in a landslide – Example of analysis in OODAIRA Landslide area

2008 ◽  
pp. 1023-1029
Author(s):  
Masao Yamada ◽  
Keizo Ugai
Keyword(s):  
Flow Analysis ◽  
Seepage Flow ◽  
Geological Structure ◽  
Landslide Area

scholarly journals TUNNEL PORTAL INSTABILITY IN LANDSLIDE AREA AND REMEDIAL SOLUTION: A CASE STUDY

2019 ◽  
Vol 59 (5) ◽  
pp. 435-447 ◽  
Author(s):  
Farhad Farhadi Ayoublou ◽  
Majid Taromi ◽  
Abbas Eftekhari
Keyword(s):  
Geological Structure ◽  
Construction Process ◽  
Site Location ◽  
Landslide Area ◽  
Tunnel Excavation ◽  
Excavation Process ◽  
Geological Formations ◽  
Zagros Region ◽  
Tunnel Portal

The construction of tunnel portals in mountainous or slope areas often involves problems, which are closely related to factors, such as slope topography, geology, geotechnics, construction geometry and the tunnel excavation method. The activation of landslides or the acceleration of these events is one of the main challenges faced in the construction of tunnel portals. In this paper, we address the instability problem in Sabzkuh tunnel portal that has been excavated with a complex geological profile and high seismicity in Iran’s High Zagros region. The complexity and intense heterogeneity in geological formations, land acquisition problems and the lack of appropriate monitoring programs led to the instability of the tunnel portal. The excavation process started without applying appropriate techniques for a ground stabilization. The use of inappropriate tunnel excavation methods for this unstable geological structure resulted in an activation of an old Solaghan fault and several collapses in the tunnel. Crossing the collapsed areas and reinforcing the tunnel portal took about 7 months and imposed heavy costs on the project. This case study deals with the importance of the choice of the site location, ground and underground monitoring, analysing and summarizing the collected data in order to prepare a geological model before and during the construction process.

Influence of Convalescence on Soil Temperature Field of Well Group around Vertical Single-U-Tube Ground Source Heat Exchangers

2012 ◽  
Vol 430-432 ◽  
pp. 1712-1715
Author(s):  
Zhen Yu Du ◽  
Yi Xing Zhang
Keyword(s):  
Temperature Field ◽  
Soil Temperature ◽  
Moisture Transfer ◽  
Three Dimensional ◽  
Thermal Response ◽  
Seepage Flow ◽  
Geological Structure ◽  
Temperature Fields ◽  
Tube Heat Exchanger ◽  
Ground Source

In this paper, the mathematical physical model of the heat and moisture transfer in the single-U-tube heat exchanger of a ground source heat pump(GSHP) on well group is established and validated using observed data from the practical rock-soil thermal response test for a resident district in Taiyuan, water in soil is three-dimensional seepage flow and the soil is layered according to the geological structure in the depth direction. The dynamic load of the district for one year is input into the model. The temperature fields of well group are simulated numerically in the two conditions which convalescence periods are omitted or not. It shows that it rather necessary to take the influence of convalescence periods into consideration while predicting the soil temperature field of a GSHP system running for a long term.

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