Civil Engineering - Estimating and Costing - Discussion
Discussion Forum : Estimating and Costing - Section 2 (Q.No. 8)
8.
A cement concrete road is 1000 m long, 8 m wide and 15 cm thick over the sub-base of 10 cm thick gravel. The box cutting in road crust is
Discussion:
42 comments Page 1 of 5.
Kabi said:
2 weeks ago
The road is made of two layers:
1. A 15 cm thick concrete layer.
2. A 10 cm thick gravel sub-base layer.
Box cutting is all about how much earth you need to remove, so we only care about the final dimensions of the road profile. So, we need to consider both layers (concrete and gravel) to determine the total depth of the excavation.
1. Calculate the total thickness:
The total thickness is 15 cm (concrete) + 10 cm (gravel) = 25 cm.
We need to convert this to meters: 25 cm = 0.25 m.
2. Calculate the volume:
Volume is calculated by: Length x Width x Height (or Thickness in this case).
Length = 1000 m.
Width = 8 m.
Thickness = 0.25 m.
Volume = 1000 m x 8 m x 0.25 m = 2000 m3.
Therefore, the correct answer is Option D: 2000 m3.
1. A 15 cm thick concrete layer.
2. A 10 cm thick gravel sub-base layer.
Box cutting is all about how much earth you need to remove, so we only care about the final dimensions of the road profile. So, we need to consider both layers (concrete and gravel) to determine the total depth of the excavation.
1. Calculate the total thickness:
The total thickness is 15 cm (concrete) + 10 cm (gravel) = 25 cm.
We need to convert this to meters: 25 cm = 0.25 m.
2. Calculate the volume:
Volume is calculated by: Length x Width x Height (or Thickness in this case).
Length = 1000 m.
Width = 8 m.
Thickness = 0.25 m.
Volume = 1000 m x 8 m x 0.25 m = 2000 m3.
Therefore, the correct answer is Option D: 2000 m3.
Gideon Hniarthul said:
3 years ago
Quantity of cc road = 1000*8*0.15 = 1200 cum.
Quantity of sub-base gravel = 1000*8*0.10 = 800 cum.
Tt. Quantity = 1200 + 800 = 2000 cum.
Formulae for cut-off volume = (1/4)*2000,
= 500 cum.
Box cutting in road crust = 2000-500,
= 1500 cum.
Hence, 1500 cum is the total volume for box cutting in road crust.
Quantity of sub-base gravel = 1000*8*0.10 = 800 cum.
Tt. Quantity = 1200 + 800 = 2000 cum.
Formulae for cut-off volume = (1/4)*2000,
= 500 cum.
Box cutting in road crust = 2000-500,
= 1500 cum.
Hence, 1500 cum is the total volume for box cutting in road crust.
(15)
Sugadev said:
4 years ago
Orginal volume = 1000m * 8m * (15cm+10cm),
= 1000 * 8 * 0.25cum,
= 2000 cum.
Cutt-off volume = (1/4) * original volume.
= (1/4) * 2000cum,
= 500cum.
So, Box cutting in road curst = (2000-500),
= 1500cum.
= 1000 * 8 * 0.25cum,
= 2000 cum.
Cutt-off volume = (1/4) * original volume.
= (1/4) * 2000cum,
= 500cum.
So, Box cutting in road curst = (2000-500),
= 1500cum.
(15)
Sam said:
4 years ago
Box cutting means the excavation of the road so as to fit the road in the excavated portion this is done to make road level with the surrounding, now you have remembered that there is compaction of 6.25cm in gravel in the subbase so remaining total available ht will be 15+3.75cm, and then as usual l*b*h.
(9)
Ranjith said:
4 years ago
L = 1000m,
B = 8.00m,
D = (0.15m+0.10m),
Q = LXBXD = 1000m X 8.00mX 0.25m = 2000 cu.m.
B = 8.00m,
D = (0.15m+0.10m),
Q = LXBXD = 1000m X 8.00mX 0.25m = 2000 cu.m.
(4)
Akash Singh said:
5 years ago
Original volume= 1000*8*(15+10) = 2000m3.
Cut off volume= 1/4 * 2000 = 500m3.
Box cutting=2000-500= 1500m3.
Cut off volume= 1/4 * 2000 = 500m3.
Box cutting=2000-500= 1500m3.
(1)
Dalwinder singh said:
5 years ago
1000 * 8 * 0.15= 1200.
1000 * 8 * 0.10 = 800.
1200 + 800 = 2000m3.
1000 * 8 * 0.10 = 800.
1200 + 800 = 2000m3.
(3)
Vishal said:
5 years ago
1000*8*0.15 = 1200;m3.
SSC je 2016.
SSC je 2016.
(2)
Swati said:
6 years ago
Box cutting = lbh of concrete + lbh gravel.
=1000 * 8 * 0.15 + 1000 * 8 * 0.10,
= 1200 + 800,
= 2000.
=1000 * 8 * 0.15 + 1000 * 8 * 0.10,
= 1200 + 800,
= 2000.
(3)
Vivek Arya said:
6 years ago
Orginal volume = 1000m * 8m * (15cm+10cm),
= 1000 * 8 * 0.25cum,
= 2000 cum.
Cutt-off volume = (1/4) * original volume.
= (1/4) * 2000cum,
= 500cum.
So, Box cutting in road curst = (2000-500).
= 1500cum.
= 1000 * 8 * 0.25cum,
= 2000 cum.
Cutt-off volume = (1/4) * original volume.
= (1/4) * 2000cum,
= 500cum.
So, Box cutting in road curst = (2000-500).
= 1500cum.
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