Recent Advances in Geotechnical Research by Wei Wu

Author:Wei Wu
Language: eng
Format: epub, pdf
ISBN: 9783319896717
Publisher: Springer International Publishing

Fig. 6The failure process of a reinforced slope (s/d=3.88)

Fig. 7The failures with big pile spacing

In theory the exposed side view represents the cross section A-A in Fig. 5a, but due to the side friction the failure mass in this plane could be smaller than the cross section in the middle and also later in failing time. However, PIV analysis is still able to give good results of the shearing effect in the slope. Figure 8 shows the total maximum shear strain for slopes with different pile spacing. Multi-shear-band phenomena can be seen in all the tests. The biggest shear band is formed by the integrated deformation of the unstable slope and the others are the local shear band developed by the arching effect, which also distinguish the soil zones along depth. For slopes with small pile spacing (Fig. 8c, d), the shearing effect among the three soil zones is well captured. For slopes with big pile spacing (Fig. 8a, b), the smaller shear band between zone 1 and zone 2 is not formed which indicates weak arching effect from the piles. The shear band between zone 2 and zone 3 is close to the integrated wedge shear band, which are also visualised in Fig. 7.

Fig. 8The total maximum shear strain before failure

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