2. Calculate the cost of excavating a trench of the following dimensions: Length = 1km Average width = 2m Average depth = 1.2m The excavation will be done using a hydraulic excavator with a heaped bucket capacity of 1.2m³. The material is common earth and the machine's maximum depth of cut is 3m. The average swing is 75º. Assume a job efficiency of 45min/hr. The hourly cost of the excavator is $100.

2. Calculate the cost of excavating a trench of the following dimensions: Length = 1km Average width = 2m Average depth = 1.2m The excavation will be done using a hydraulic excavator with a heaped bucket capacity of 1.2m³. The material is common earth and the machine's maximum depth of cut is 3m. The average swing is 75º. Assume a job efficiency of 45min/hr. The hourly cost of the excavator is $100.

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter18: Sheet-pile Walls

Section: Chapter Questions

Problem 18.6P

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A 6-yd hydraulic shovel with a bottom-dump bucket is excavating common earth. The swing angle is 75 degree and job efficiency is 40 min/h. The bucket fill factor is 0.9. Estimate the shovel's hourly production in BANK measure. 604.8 BCY/h 263 BCY/h 318.5 BCY/h 483.84 BCY/h Question 2 For the same question: A 6-yd hydraulic shovel with a bottom-dump bucket is excavating common earth. The swing angle is 75 degree and job efficiency is 40 min/h. The bucket fill factor is 0.9, What is the job efficiency required to reduce the current cost per BCY by $5 if the shovel costs $5000 per hour? 1.3 0.666 0.7 1.1
4. A crawler hoe having a 2% -cy bucket and whose cost per hour, including the wages to an operator, is $67, will excavate and load haul units under each of the stated conditions. The maximum digging depth of the machine is 20 ft. Determine the cost per bank cubic yard for each condition. (Condition 1. 300 bey/hr, $0.223/bey; Condition 2.319 bey/hr, $0.210/bcy; Condition 3. 128 bey/hr, $0.523/bcy) Condition Material Depth of excavation (ft) Angle of swing (degrees) Percent swell Efficiency factor (min-hr) 45 (1) Moist loam, earth 12 60 (2) (3) Sand and gravel Rock, well blasted 16 14 120 80 14 50 45
Q.3/A Crawler hoe having a three Cyd bucket and whose cost per hour, including the wage to an operator, is $95 will excavate and load haul units under each stated condition. The maximum digging height of the machine is (25 ft.). Determine the cost of one cubic yard for each condition. Condition 1 2 3 Material Depth of excavation Percent swell Angle of swing Efficiency factor (min/hr) Sandy clay Hard clay Rock, well blasted 18 15 35 90 50 10 20 60 45 60 90 50 4 Sand & gravel 20 13 150 55
A hydraulic excavator with a 2 cubic yard heaped capacity bucket is excavating in common earth. The depth of the excavation is 8 feet. The excavator has a maximum rated digging depth of 16 feet. The excavated material will be positioned so that the swing angle is 75 degrees. The job efficiency is 55 minutes per hour. Find the expected production per hour.
11.2 A crawler hoe with a 3-cy bucket and a cost per hour, including the wages to an operator, of $86 will excavate and load haul units under each of the stated conditions. The maximum digging depth of the machine is 25 ft. Determine the cost per bank cubic yard for each of the stated conditions. Condition Material Depth of excavation (ft) Angle of swing (degrees) Percent swell Efficiency factor (min-hr) (1) Sandy clay 10 60 20 45 (2) Hard clay 18 90 50 (3) Rock, well blasted 15 90 50 (4) Sand and gravel 20 150 13 55
The earthworks data of a proposed highway is tabulated below. The free haul distance is 50m and the cost of borrow is P420 per cum, cost of excavation is P350 per cum. and the cost of haul is P21 per meter station. The ground surface is assumed to be uniformly sloping. (a) Compute the free haul volume. (b) Compute the overhaul volume. (Non-anonymous questionO)
4. A crawler hoe having a 2 ½ -cy bucket and whose cost per hour, including the wages to an operator, is $67, will excavate and load haul units under each of the stated conditions. The maximum digging depth of the machine is 20 ft. Determine the cost per bank cubic yard for each condition. (Condition 1. 300 bcy/hr, $0.223/bcy; Condition 2.319 bcy/hr, $0.210/bcy; Condition 3. 128 bcy/hr, $0.523/bcy) Condition (1) (2) (3) Material Moist loam, earth Sand and gravel Rock, well blasted Depth of excavation (ft) 12 16 14 Angle of swing (degrees) 60 80 120 Percent swell 14 Efficiency factor (min-hr) 45 50 45
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9.5 A crawler hoe having a 24 -cy bucket and whose cost per hour, including the wages to an operator, is $109 will excavate and load haul units under each of the stated conditions. The maximum digging depth of the machine is 22 ft. Determine the cost per bank cubic yard for cach condition. (Condition 1: 315 bey/hr, S0.346/bcy; condition 2: 289 bey/hr, S0.377/bcy; condition 3: 99 bey/hr, S1.101/bcy) Condition (1) (2) (3) Moist loam, earth Rock, poorly blasted Material Sand and gravel 12 80 10 Depth of excavation (ft) Angle of swing (degrees) Percent swell Efficiency factor (min per hr) 15 60 100 14 50 45 50
STATION 1+ 125 a b. 12 10 10-m 10-m 5.30 6.20 1.5 8.80 DETERMINE THE VALUES OF "a" AND "b" And The volume of excavation and fill using end-area method
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5. A crawler hoe having a 3-cy bucket and whose cost per hour, including the wages to an operator, is $86, will excavate and load haul units under each of the stated conditions. The maximum digging depth of the machine is 25 ft. Determine the cost per bank cubic yard for each condition. Condition (1) (2) (3) (4) Material Sandy clay Hard clay Rock, well blasted Sand and gravel Depth of excavation (ft) Angle of swing (degrees) 10 60 88 18 15 20 90 90 00 150 Percent swell Efficiency factor (min-hr) 45 50 24 20 50 50 55 35 13