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| shoring & strutting |
Excavation:
1) It shall be ensured that all necessary equipments, tools, instruments, material and consumables including temporary facilities like platform, walkways etc. as mentioned are available at site.
2) All skilled / unskilled manpower along with supervisory personnel for carrying out work shall have sufficient experience on similar works.
3) Excavation drawings shall clearly indicate in plan (preferably by dotted line) the part of soil to be excavated and also levels to which excavation needs to be carried out.
4) For the purpose of understanding terminology used for soil to be excavated, soil shall be classified in accordance with IS-1200 part I. as under.
1) It shall be ensured that all necessary equipments, tools, instruments, material and consumables including temporary facilities like platform, walkways etc. as mentioned are available at site.
2) All skilled / unskilled manpower along with supervisory personnel for carrying out work shall have sufficient experience on similar works.
3) Excavation drawings shall clearly indicate in plan (preferably by dotted line) the part of soil to be excavated and also levels to which excavation needs to be carried out.
4) For the purpose of understanding terminology used for soil to be excavated, soil shall be classified in accordance with IS-1200 part I. as under.
a) Ordinary soils
These shall includes all kinds of soils containing sand, silt, hard and soft murum, shingles, gravel, clay, loam, ash, etc. which can generally be excavated by spades, pick axes and shovels.
Removal of the same shall be done by mechanical excavators, shovels, draglines etc.
b) Soft and Decomposed rock
This shall include rock, boulders, chalk, slate, laterite and all other materials which does not need blasting and can be removed with picks, hammers, crow bars, wedges and pneumatic breaking equipment like jack Hammers.
These shall includes all kinds of soils containing sand, silt, hard and soft murum, shingles, gravel, clay, loam, ash, etc. which can generally be excavated by spades, pick axes and shovels.
Removal of the same shall be done by mechanical excavators, shovels, draglines etc.
b) Soft and Decomposed rock
This shall include rock, boulders, chalk, slate, laterite and all other materials which does not need blasting and can be removed with picks, hammers, crow bars, wedges and pneumatic breaking equipment like jack Hammers.
c) Hard Rock
This shall include all rock, occurring in large continuous masses, which cannot be removed except by blasting. Boulders of rock occurring in such sizes and not classified under (a) and (b) above shall also be classified as hard rock. Excavation in reinforced cement Concrete Works shall be treated as excavation in hard rock.
This shall include all rock, occurring in large continuous masses, which cannot be removed except by blasting. Boulders of rock occurring in such sizes and not classified under (a) and (b) above shall also be classified as hard rock. Excavation in reinforced cement Concrete Works shall be treated as excavation in hard rock.
Well written!
ReplyDeleteYou cannot use explosive excavation methods in living areas.