ANALYSIS OF RATE FOR EXCAVATION BY MECHANICAL MEANS

Analysis of rate for Excavation by Mechanical means i.e. Earth work in excavation by mechanical means (Hydraulic excavator) over areas including getting out and disposal of excavated earth within a plant premises approximately 5km x 5km area and lift upto 1.5 m depth, in All Kinds of Soil.

Analyzing the rate for excavation by mechanical means involves breaking down the task into various components like equipment cost, labor cost, fuel consumption, and overheads. Here's a detailed analysis:

1. Scope of Work:

• Excavation Type: Earthwork in excavation by mechanical means.
• Depth: Upto 1.5 meters.
• Area of Disposal: Within a 5 km x 5 km plant premises.
• Soil Type: All kinds of soil.

2. Components of Rate Analysis:

a. Equipment Cost:

• Hydraulic Excavator:

  • Capacity: Typically 0.9 m³ bucket.

  • Productivity: ~100 m³/hour (depending on soil type and site conditions).

  • Operational cost: Includes equipment hire, operator charges, maintenance, and depreciation.

  • Calculation:

    • Excavator rental cost: ~₹800-₹1,200 per hour.
    • Productivity per hour: ~100 m³.
    • Excavation cost: ₹8-₹12/m³.

b. Fuel Consumption:

• Excavators consume ~12-15 liters of diesel per hour.
• Diesel cost (as of recent): ₹90-₹100/liter.
• Fuel cost: 12 liters × ₹95/liter = ₹1,140/hour.
• Per cubic meter cost: ₹11.4/m³.

c. Labor Cost:

• Operator wages: ₹800-₹1,200/day.
• Helper wages (if required): ₹500-₹700/day.
• Approximate labor cost: ₹1.3-₹2/m³.

d. Transportation and Disposal:

• Dumpers/Trucks for Earth Disposal:
  • Capacity: 6-10 m³ per trip.
  • Number of trips required: (Volume excavated) ÷ (Truck capacity).
  • Fuel consumption and transportation cost: ₹80-₹150/m³ depending on the haul distance within the premises.

e. Miscellaneous Costs:

• Site clearance, supervision, tools, and other contingencies.
• Estimated at 5%-10% of total cost.

3. Overall Rate Estimation:

For excavation and disposal, combining all components:

• Excavation: ₹20-₹25/m³ (including equipment, fuel, and labor).
• Transportation: ₹80-₹150/m³ (depending on haul distance and efficiency).
• Miscellaneous: ₹10-₹15/m³.

Total Rate: ₹110-₹190/m³.

4. Key Assumptions:

1. The soil type does not significantly affect productivity.
2. The area within the premises is accessible for excavation and transportation.
3. Local labor and equipment rental rates are in the range specified.
4. Fuel prices are based on current rates and may vary.