new pneumatic drilling machine for strengthening foundations
Post on 27-Nov-2015
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New pneumatic drilling machine for strengthening
foundations
The Use of pneumatic drilling machines for installing underground mains without
the digging of trenches is held up by the lack of precision with which the machine can be
made to exit at the desired point and the impossibility of correcting its motion in the
ground.
Various Organizations in this country and foreign companies have attempted to
improve the accuracy of the tunnel excavation by using different types of extenders
attached to the body of the machine.
This project is a design of a new pneumatic drilling machine with a sectional
expander and gives its mechanical characteristics. The technology of the deep
compaction of soil in the vertical plane is examined.
Relations and nomograms are presented to determine the distance between drill
holes and drilling speed in relation to the diameter and depth of the holes and the
sequence in which they are expanded. The dependence of the duration of soil compaction
on the time spent performing the main and auxiliary operations is also determined and the
design is made in this project.
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