technical NOTES

• Note: Operating cost shall be validated with present condition

9.2 Observation

• It is found that cost of counterfort retaining wall is less compared to cantilever
  retaining wall. Overall saving in cost is Rs.1.4 Cr for Permanent LS Crusher Retaining
  walls.


• Reinforcement factor is less in counterfort retaining wall.

9.3 Conclusion
When the height of wall is above 7-8 m, Counterfort retaining wall should be
adopted which is more economical compared to Cantilever wall system for RCC
construction.

Item Unit Rate

Counterfort Cantilever

Qty. Value Qty. Value

A) Contractor Cost

Concrete Cum 4682 25.18 1,17,893 29.11 1,36,293

R/F MT 10047 2.84 28,533 3.66 36,772

Shuttering SQM 603 54.6 32,924 32.4 19,537

Total A 1,79,350 1,92,602

B) Material cost

Cement MT 5000 12.59 62,950 14.56 72,775

R/F MT 46000 2.84 1,30,640 3.66 1,68,360

Total B 1,93,590 2,41,135

Total A+B 3,72,940 4,33,737

Cost Difference (Rs/RM) 60,797

Total Length of wall 232 Mtr.

Cost Difference (Lacs) 141 Lacs