Novel Issues on Unsaturated Soil Mechanics and Rock Engineering by Laureano R. Hoyos & John S. McCartney

Author:Laureano R. Hoyos & John S. McCartney
Language: eng
Format: epub
ISBN: 9783030019358
Publisher: Springer International Publishing

On the other hand, Fig. 9 shows the results of the comparison between the simulation and the measurements data close to the building side. Figure 9(a)–(c) show the simulated and measured soil suction (BU1, BU2 and Bu3) at 0.8 m depth. It can be observed that the simulation does not match the measurements from 08/2013 to 09/2013 where a suction peak of 100 kPa is observed. This could be related to the fact that the arbitrary root distribution in the simulation does not represents the real root distribution in the field. However, the other two plots (Fig. 9(b) and (c)) shows good agreement with the measurements, mostly when the peak values are observed. Figure 9(d) and (e) shows a complete saturated state by measurements at 1.5 and 2.3 m depth, however the simulation shows suction variations around 40 to 50 kPa. As mentioned in Fig. 8(d), this could be related to the retention properties. Figure 9(f) sows the results of the comparison at 3 m depth in the same exact position of the BU7 probe. It can be observed that the simulation results are in coherence with the observation until 03/2015 where a suction peak is observed. This is also related to the fact that some tree roots would have been growing or begin to generate suction at this time which could have not been known in the initial conditions of the simulation. Finally, Fig. 9(g) and (h) show the results of the additional probes installed in late 2013 from 3.5 m to 5 m depth. It can be observed that the simulation does not show a complete saturated state as shown by the measurements however, they are comparable to the observations as they show low suction values.

Fig. 9.Comparison of the simulated soil suction with the measurements close to the building side.

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