Estimating excavation & dumping cost by using JCB & tipper truck.

 Let us calculate the cost of excavation & dumping at the construction site as shown below.

Given data:

Length of excavation = 50m.

Depth of excavation = 1.5m.

Width of excavation  = 6m.

Dumping distance = 1.5km.

Calculation:

Let us use JCB-3DX for the excavation purpose & tipper truck of 10m³ capacity.

1. Excavation cost:

The volume of the excavation

= [length × breadth  × depth]

= [ 50m. × 6m. × 1.5m.]

= 450m³.

The market rate for the JCB excavation is INR 900/-  to INR 1200/- per hour., depending upon the regional availability & demand.

Let us consider an average rate of INR 1050/- per hour, for the calculation purpose.

The excavation capacity of the JCB ranges from 30m³ to 50m³ per hour, depending upon the type of soil.

Let us consider an average excavation capacity of 40m³/ hour for the calculation.

The cost of excavation 

= [(Total vol. of excavation ÷ excavation capacity/hr. ) × JCB rate/hr.]

= [(450m³ ÷ 40m³/ hour ) × INR 1050/-]

=[11.25hour × 1050/hour ]

= INR 11,812/-  

2. Dumping cost:

The distance of the filling area is 1.5km. from the excavated site.

The total distance traveled by a tipper truck 

= up & down of 1.5km. = [2 × 1.5km.] =3km.

The tipper truck nearly takes 15min.(0.25hr.) to travel the distance of  3km.

The excavated volume by JCB = 40m³/ hour 

Therefore no. of trucks needed/hr. 

= [excavated vol./hr. ÷ tipper capacity]

= [ 40m³  ÷ 10m³]

= 4 nos.

 JCB takes 15min. ( 0.25hr.) to load one truck of  10m³ capacity.

So, the total time consumed by a tipper/trip

= [loading time + traveling time]

= [0.25hr. + 0.25hr.] 

 = 0.50hr.

This suggests taking 2no. of trucks without keeping the JCB in an idle position.

The market rate for the tipper truck is INR 300/-  to INR 500/- per trip, depending upon the regional availability & demand.

Let us consider an average rate of  INR 400/- for calculation purposes.

Note: 

The tipper rate/trip depends upon the distance traveled. The above-mentioned rate is for the distance within 2km. 

The cost of  dumping 

 = [(Total vol. of excavation ÷ tipper capacity )× soil bulking factor × tipper rate/ trip]

 = [(450m³ ÷ 10m³ ) ×1.15 × INR 400/-]

 =[45 trips × 1.15 × INR 400/- ]

 = INR 20,700/-  

Note: 

The bulking factor is the percentage of volume change of excavated material (due to expansion) to the original volume before excavation. 

The bulking factor differs from soil to soil & degree of compaction. However, for the calculation purpose, an average bulking factor i.e. 1.15 is considered.

The total cost of excavation & filling

= [excavation cost + dumping cost]

= [ 11,812/- + 20,700/-]

= INR 32,512/-

Note: 

Insert the market rate of your region in the above procedure to estimate the correct cost.

To go through the articles on Estimation & calculation in civil engineering, click here.

Thank you for going through these calculation steps❤. Have a good day 😄.

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