Earthwork in Excavation

Earthwork in excavation in foundations

Excavation –

  • Trenches shall be dug to exact width of foundation and to the maximum should be vertical (vertically especially to maximum height as the thickness of lean concrete is 8 to 10 inches.
  • In case of loose soil, extra payment for shoring may be required to retain the soil.
  • Material shall be placed minimum 1m away from trench.
  • Normal lift and lead are 1.5m and 30m respectively.
  • If contractors digs the trench more than required then the extra depth has to be refilled with earth or concrete. Rammers of 6kg and area 200 sq. cm. are used.
  • Both directions of the trench have to be levelled.
  • In case if there are any organic material, these materials should be taken out and replaced with good quality soil in layers of 200mm and the compacted.
  • During excavation if any of historic materials like coins, fossils, etc. are found, they must be handed over to the government.
  • In case if ground water table is very high, extra payment is made to the contractor for dewatering.
  • During rains, if trenches are filled with water as he has not put any covering, he will have to pump out the water.
  • While refilling, good quality soil should be used.

Dimensions – width of lean concrete and depth of foundation is set according to the design.

Rates – cost of tools and equipments, labor required, lift and lead and proper margins are considered.

Guneet Singh Khurana
Ar. Guneet Singh Khurana is a visionary architect, author and currently working in Design Arch as Principal Architect. He holds B.Arch degree from Department of Architecture, Guru Nanak Dev University, Amritsar. His creative approach and interest in designing inspired him to pursue future in architecture. He has an extensive experience in the field of architecture and urban design. He is the founder of Archistudent.net (a resource portal dedicated to providing information and knowledge to the growing community of architecture, interior design, landscape and planning). He is recipient of the PAFE Award for excellence in the field of Environment friendly architecture and University Scholarship for excellence in academics.

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