Geoscience Reference
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Fig. 8.9 Damaged retaining
wall, 14 Miles Bustee
8.3.4 Breast Wall
Breast walls are the construction close to the slope base built to protect freshly cut
slope from slope failure. Along the roads, the breast wall is constructed along the
inward side of the slope. It is one of the popular soil and slope conservation
measures and is frequently observed along the road cuts. Slopes need to be trimmed
and flattened before construction. More stable concave slopes are not often formed
due to the construction of breast wall at the base by further cutting and steepening.
As already mentioned the back fills are prone to more slide due to lack of easy
drainage of the seepage water. The weep holes are often clogged with clay and silt
and need to be monitored regularly and other options of immediate and easy
drainage should be open. The new road cuts are very much prone to down slope
movement of soil and slope materials and the necessity of breast wall and retaining
wall is urgently felt to restore the stability of the vulnerable slopes mainly at
Tindharia (Figs. 8.10 and 8.11 ), Sepoydhura and Shiviter. At Paglajhora breast wall
with jhora training has been established to check seepage pressure as well as
landslip (Fig. 8.10 ).
8.3.5 Catchment Water Drainage
Drainage may be used to prevent surface or sub-surface water reaching the slide
area or to remove it from the slide area (Bianco and Bruce 1991 ). Water in the slide
area may be the result of steady seepage flows, or it may be released from the soil or
rock mass by stress changes or chemical activity, for example loading or the
 
 
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