Pneumatic Radial Loading To Ease Preloading – An Innovative Technique
Abstract
Soft ground improvement gained prominence all over
the world in view of ever growing engineering activities for
various purposes. In view of serious problems during and after
construction in these deposits, vertical drains method using
preloading is being frequently applied to improve these soil beds.
However, in view of the difficulties associated with this technique,
an alternative vacuum preloading technique was developed. But
vacuum preloading is also limited to the available atmospheric
pressure with inevitable technical difficulties. The present paper
discusses an innovative technique of applying radial pneumatic
pressure with the help of inflatable balloons/tubes. The drainage
is facilitated along the surface of inflatable tubes by providing
fabric strips/the traditional strip drains. The laboratory
experimentation in test tank indicated that this technique has the
potential for practical applications.
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