Figure 2 - uploaded by George Kouretzis
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21. (a) Use of gravity drains to lower the groundwater level, and (b) Use of gravity drains to isolate a contaminated zone. Notice that drains must penetrate the impermeable layer.
Source publication
The notes at hand were prepared as part of the teaching material for the course Geotechnical and Geoenvironmental Engineering, offered by the University of Newcastle, Australia. They built upon fundamentals of Soil Mechanics and Foundation Engineering introduced in the previous Geomechanics courses, focusing on their application in practical Geotec...
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Using high-filled cut-and-cover tunnels (HFCCTs) can provide a practical and ideal solution for the possibility of using highly demanded lands with plateaus terrain. The huge amount of HFCCT backfill soil produces ultrahigh vertical earth pressure (VEP). Therefore it is necessary to use load reduction methods and mechanisms to reduce the VEP on the...
Citations
... Thus, along pile length where the settlement of pile (ρpile) is less than the settlement of the surrounding soil (ρsoil), the developing skin frictions will have an opposite sign (negative skin friction), compared to skin friction at the lower part of a pile. Thus, instead of contributing to pile resistance, the friction along the upper part of piles will add to the external loads, Fig. 1 (Kouretzis, G. 2018). Ground settlement relative to the pile may be attributed to the following reasons (Bowles, J. 1997): 1. Weight of superimposed fill. ...
... It is obvious from Figs. (9 and 10) that, the maximum negative skin friction is (44.8 kN/m 2 ) and (28.7kN/m 2 ), the neutral points (neutral points: the level where pile settlement equals settlement of the surrounding ground, Kouretzis, G. 2018) is at (12.4 m) and (12.9 m) from the ground surface, for the driven and bored piles, respectively. ...
