A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Centrifuge Test of Face Stability of Shallow Tunnels in Unsaturated Soil
Tunnels are often driven at shallow depth in urban areas where unsaturated soils may be encountered. Capillary rise from the water table, causing partial saturation of the material, increases the cohesion of the soil mass. The stiffening effect of partial saturation can stabilize the tunnel face in such way that open-face tunnelling can be performed and settlement minimised. However, the effect of capillary cohesion is difficult to quantify. Centrifuge testing has proven to be an appropriate technique to assess the face stability of shallow tunnels (Mair and Taylor, 1997), and several studies have been conducted, both in cohesive and frictional material (Idinger et al., 2011). However, little attempt has been made to extend centrifuge testing to shallow tunnelling in partially saturated soils. In this paper, some centrifuge tests on model tunnel in unsaturated soil are presented.
Centrifuge Test of Face Stability of Shallow Tunnels in Unsaturated Soil
Tunnels are often driven at shallow depth in urban areas where unsaturated soils may be encountered. Capillary rise from the water table, causing partial saturation of the material, increases the cohesion of the soil mass. The stiffening effect of partial saturation can stabilize the tunnel face in such way that open-face tunnelling can be performed and settlement minimised. However, the effect of capillary cohesion is difficult to quantify. Centrifuge testing has proven to be an appropriate technique to assess the face stability of shallow tunnels (Mair and Taylor, 1997), and several studies have been conducted, both in cohesive and frictional material (Idinger et al., 2011). However, little attempt has been made to extend centrifuge testing to shallow tunnelling in partially saturated soils. In this paper, some centrifuge tests on model tunnel in unsaturated soil are presented.
Centrifuge Test of Face Stability of Shallow Tunnels in Unsaturated Soil
Soranzo, E. (author) / Wu, Wei (author)
Fifth Biot Conference on Poromechanics ; 2013 ; Vienna, Austria
Poromechanics V ; 1326-1335
2013-06-18
Conference paper
Electronic Resource
English
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