![]() Precipice Work for Construction of hill roads Blasted stones are using for retaining walls, back-filling high retaining walls and aprons etc. It can be over-blasting the drain on hill-side is also formed. Unless special care is taken, blasting may be slightly short of requirement. ![]() In actual construction, there is great difficulty in removing rock exactly to the require levels and grade. The cutting is commence at point on the hill-side far above the formation level for obtaining sufficient batter for the inner slope.īlowing out the cliff face by firing large mines then dressing the slope, is another alternative. If the rock is soft or loosely stratifying. In such a case, blasting and cutting is commencing from top. The cutting is continuing until the inner slope is at a safe angle to prevent slipping. If the strata are inclining towards the hill slope. ![]() The bore holes for ‘end attack’ and ‘face attack’ for blasting the hard rock. Blasting is doing either from face or from one or both sides. The hard rock is permit to over-hang the road forming a half tunnel. If the rock strata slope downward into the hill-side. Rock cutting, drilling, blasting and clearing.Earth work excavation through soil and soft rocks.The construction of formation works consist of the following steps: Also, very steep terrains including through hard rocks and at high altitudes. However special problems are face while constructing hill roads in steep. So, as to carry out the next stages of construction such as protective works, drainage works and pavement. The forming of hill roads and construction steps are given below :- Formation Works for construction of hill roadsįirst it is necessary to construct the formation or the finished profile of hill road.
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