# Calculate the Estimate of Rock Fill Dam

**Calculate the Estimate of Rock Fill Dam**

**what is the rockfill dam?**

the rockfill dam is a structure to be constructed with a stone across a gulley to make water flow slow, rockfill dam (RFD) has to be constructed across the first order and 2nd order gullies in upper parts of catchments to reduce the speed of the rainwater and protect the fertile soil from erosion in farmer’s land.

now we calculate the estimate of rockfill dam given data

construction of RFD have gully depth is 1.2m.gully width is 6m.purpose of the RFD is to prevent the future deepening of the gully and prevent damage to the field

**dimension of the work**

RFD has a 7m wall including 0.5m key wall both sides having a height of 1m and the total width of the structure is 4.5m,

body wall top width 0.5m, height,1.00m(freeboard =0.30m|) u/s slope is 1:1,d/s slope is 1.5:1, apron thickness is 0.30m.toe wall width 0.60. and depth 0.0m and length of the apron0.90m and suppose the length of the headwall is 7m.below given drawing.

**drawings **

**detail of task one **

**Learn more **

# How to Calculate the Quantity of Rebar in a Circular Slab

Earthwork excavation and deposition on the bank with an initial lead of 10m and lift of 2m in loamy and clay soils for construction rockfill dam. in this detail of rockfill dam to calculate the estimate.

detail quantity of work

**1 body wall measurement including core wall**

length of wall 7m

bottom width 3m

foundation depth 03m

**2 for apron **

length of stone 0.9m

width of apron 0.60m

depth of foundation 0.3m

**3 toe wall **

length 6m

width 0.6m

depth of foundation 0.6m

**4 end bank mark leveling **

length 1m

width 3.0m

depth 0.6m

**detail for 2**

rough stone dry packing with 225mm thick cost od stone and labor cost of stone is taken as 100m it is available with the distance of 100m from the site

**1 For main wall (filling of foundation)**

length 7.0m

width3.0m

depth 03m

2 for the main wall above ground level

length 7.0m

width 3.0+0.5/2

height above ground 1m

**3 for apron**

length 0.9m

width 6m

height .3m

**4 for toe wall**

length =width = 6m

width 6m

height 6m

**5 for wing wall**

length above the bottom wall

wing wall is two both sides

length =width of core wall= 1+.5+1.5=3

width 0.225m

height 0.45m

**6 over apron**

apron also 2

length=legth of apron +width of toe wall=.9+.6=1.5

width of wing wall 0.225

height of wing wall .45

**7 deduction for overlapping with headwall**

the headwall is also 2

length average width of the core wall up to a height of 0.45m

average bottom +top width/2 = 3+1.875/2=2.44

width of the wing wall 0.225

average height outside the headwall = .45+0/2= 0.225

**detail estimate**

s no | decripirtion | unit of work | nos | length(m) | width(m) | depth(m) | quantity(m) |

1 | detail of 01 | ||||||

a | foundation for body wall including core wall | cum | 1 | 7 | 3 | 0.3 | 6.3 |

b | foundation of apron | cum | 1 | 0.9 | 6 | 0.3 | 1.62 |

c | the foundation of the toe wall | cum | 1 | 6 | 0.6 | 0.6 | 2.16 |

d | embankment leveling | cum | 2 | 1 | 3 | 0.6 | 3.6 |

total | 13.68 | ||||||

e | for inlet and outlet | m3 | 2 | 2 | 4 | 3 | 4.8 |

total | 96.8 | ||||||

2 | detail of 2 | ||||||

a | filling foundation for body and apron including core wall below Gl | m3 | 1 | 7 | 3 | 0.3 | 6.3 |

b | above ground | m3 | 1 | 7 | 3+.05=1.7 | 1 | 12.25 |

c | apron | m3 | 1 | 0.9 | 6 | 0.3 | 1.62 |

d | toe wall | m3 | 1 | 6 | 0.6 | 0.25 | 0.61 |

e | wing wall 0.45 over BW | M3 | 2 | 3 | 0.45 | 0.225 | 0.61 |

F | over apron and toe | m3 | 2 | 0.90+0.60=1.5 | 0.45 | 0.225 | 0.31 |

g | deduct BW quantity | m3 | 2 | 3+1.875/2=2.44 | 0.45/2=0.255 | 0.225 | -0.25 |

total | 23 | ||||||

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