🕑 Reading time: 1 minuteRate analysis of excavation in earthwork is the measure of quantity of excavation to be carried out, the cost of equipment, machineries and labors required for the same. The cost of excavation depends on the depth of excavation, type of soil, method of excavation to be carried out and the distance where the excavated soil has to be disposed. The cost of all these are added for unit volume of excavation to get the rate of excavation. The cost of excavation based on depth is generally divided into categories as:
- For depth upto 1.5m
- For depth between 1.5m to 3m.
- For depth between 3.m to 4.5m.
- For depth more than 4.5m
Summarizing above points, it can be seen that the rate analysis for excavation work can be divided by following ways: The first method is the selection of type of soil to be excavated and lead distance where the soil has to be disposed off. Then the other variable that is considered is the depth of excavation and is presented in the rate analysis description as follows: 1. Excavation in earthwork for soft soil for a lead distance of 1km for following depths: a) Up to 1.5m b) 1.5m to 3m c) 3m to 4.5m 2. Excavation in earthwork for hard soil/ hard rock for a lead distance of 1km for following depths: a) Up to 1.5m b) 1.5m to 3m c) 3m to 4.5m In the above examples of excavation, more number of descriptions are possible with different lead distance and type of soil. During tendering of civil engineering works, all the possible combinations are presented for quotations depending on the project requirements and site conditions.
Rate Analysis of Excavation:Following points to be noted before starting rate analysis of soil:
- Type of soil
- Lead distance and transport for carrying excavated soil
- Depth of excavation
- Method of excavation - manual excavation or mechanical excavation
- Capacity of labor for manual excavation
- Capacity of equipment for mechanical excavation and their cost per unit quantity.
- Water charges if used
- Profit of contractor
|Water charges @1% total||6.42|
|Contactor Profit @15%||96.23|
|Gross Amt./CUM up to 1.5m depth||COST||74.42|