/ An irrigation project requires digging and paving an irrigation canal with alength of(30 km) and a semi-circular section with a diameter of (8 m). The work mustmbe completedwithin one year, and in the event of delay, a fine delay of $200/day. You have two optionsfor work:1st Option: using standard equipment (excavators, graders and hand labor) had a cost of$10/m3, the job will be finish without delay.2nd Option: Use a channel trimmer machine with the following specifications: Purchaseprice ($70,000), it can be sold after its economic life of (5 years) for ($30,000), its speed(10m/hr), engine diesel with (250 hp) and its work 48 minutes/hr, capacity of crankcase is(50 liters), the number of hours between changing the oil (100 hr), the maintenance cost is(80%) of its depreciation, the price of one liter of fuel ($0.5/liter) and of oil ($1/liter), theoperators' wages ($15,000/year), annual operating hours (2000 hr), and the owner must paytaxes of 10% of the average value of the machine. find which of them is more economical?

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Answered: / An irrigation project requires…

Fundamentals Of Construction Estimating

4th Edition

ISBN:9781337399395

Author:Pratt, David J.

Publisher:Pratt, David J.

Chapter10: Pricing Excavation And Backfill

Section: Chapter Questions

Problem 6RQ

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A project to move packed earth requires you to decide whether to usea dozer/scraper operation or excavator/truck operation. Determinethe most economical operation based on the dozer/scraper operationestimated at $1.25/cy. All equipment carries a rated heaped capacity, hasa fill factor of 100%, and works 45-min hours. Excavator costs $95/hr（including operator), cycle time is 0.28 min, and bucket heaped capacityis 5.0 cy. Truck costs $150/hr.(including operator), dump time is 0.5 min（maneuver, dump, turn), heaped capacity is 31.7 cy, and 12 trucks areavailable for the project.Hauling equipment operates in one directionfrom A to B to C and finally to D. Section Load Length (ft) Speed (mph) A full 3000 9B full 2500 17C empty 3000 36D empty 3000 16
Question 8 Which BIM Use can be used to automate site excavation? Design Review O Machine Control O Specifications Procurement Question 7 If you are doing BIM...you should be utilizing all BIM Uses O True O False
Calculate the cost per cubic yard to move earth for a project that plans to use a back-hoe and system of trucks. All equipment carries a rated heaped capacity, has a fill factor of 100%, and works 55-min hours. Back-hoe excavator costs are $105/hr (including operator), cycle time is 0.25 min, and bucket heaped capacity is 5.5 cy. Truck costs are $150/hr (including operator), dump time is 0.70 min (maneuver, dump, turn), heaped capacity is 32.5 cy, and 10 trucks are available for the project. Hauling equipment operates in one direction from A to B to C and finally to D according to the following table. Find the following values (note: carry out your calculations to at least 4 decimal points to obtain the best results): Section Load Length (ft) Speed (mph) full full A 2,800 2,400 2,900 2,800 в 18 empty empty 37 17
the excavation works include Select one: a. filling works b. cutting works c. disposal d. all the above
A constructor has two subcontractors for his excavation work. Experience shows that in 60% of the time, subcontructor was available to do a job, whereas subcontractor B was available 80% of the time. Suppose Ea denotes the event that subcontractor A is available, ans Eb denotes that subcontractor B is available.a. Are Ea and Eb statistically independent? Explainb.Are Ea and Eb mutually exhaustive? Explainc.Are Ea and Eb collectively exhaustive? Explain
Net Cumulative Yardage ● 5000 ● 4000 3000 2000 1000 -1000 -2000 -3000 -4000 -5000 0 O $34,000.00 Compute the total excavation cost: $10,000.00 Given the Mass Haul Diagram above and the following information: Excavation Cost: $4.00/cu. yd. Borrow Cost: $4.25/cu. yd. Overhaul Cost: $1.25/sta*cu. yd. Free Haul Limit: 600 ft. $32,000.00 5.0 None of these. -3,000 O $26,000.00 1,500 5 2,100 Mass Diagram 6.0 8.0 10 3,500 7.1 2,100 -1,100 Stations 15 7.0 8.0 6.0 20 1,500 750 25
↑ NET CUMULATIVE YOS. 5,000 2,000 5 K-X1,000-31, 200 -(-)spoo MASS DIAGRAM 10 7.0 7.3 (-)2,500 1. What is the limit of economic haul in stations? 3. What is the overhaul cost in dollars? STATIONS 2. What is the total cost in dollars for excavation? 4. What is the total borrow cost in dollars? 5. What is the total waste in cubic yards? Limit of Free Haul Cost of Excavation Cost of Borrow Overhaul Price 15 ន 8.0 = 700 ft = $3.50 per cu.yd. = $3.00 per cu. yd. = $1.00 per sta yd. 25 -(-) 8000 (-11,000 (-)2,000 LENGTH IN STATIONS
Given the following Mass-Haul Diagram: Mass Diagram 5000 4000 3,500 3000 2,100 6.0 2.100 7.0 2000 8.0 1,500 1,500 8.0 ------ 1000 -1,100 - 7.1 6.0 750 5.0 0. -1000 3-2000 -3000 -3,000 -4000 -5000 10 15 20 25 Stations Limit of free haul = 600 ft Price of excavation = $3.50 Price of borrow = $3.75 Overhaul = $1.50 What is the total cost in borrow to the nearest dollar? O $0 O $2,625 $2,813 $5,625 O Non Net Cumulative Yardage
I Net Cumulative Yardage 5000 ● 4000 3000 2000 1000 0 -1000 -2000 -3000 -4000 -5000 0 O $28,875.00 O $47,812.50 4,500 Compute the total borrow costs: O $35,062.50 5.0 O $12,750.00 None of the above -1,500 0 5 --2500 Given the Mass Haul Diagram above and the following information: Excavation Cost: $3.50/cu. yd. Borrow Cost: $4.25/cu. yd. Overhaul Cost: $1.50/sta*cu. yd. Free Haul Limit: 500 ft. 8.0 5.0 16.25 -3,750 10 Stations -1,500 15 5.0 8.0 6.6 20 -750 -1,500 -3,000 25
Question Table 1 shows the list of the consecutive activities and their details for an 8-mi road construction project. Prepare a line of balance schedule for a contract of 125 sections using a target rate of build of 1.5 mile per week and each team working at their natural rate assume a minimum buffer time of 4 days between the operation and five 8 hrs days per week. 3. The rate of work progress after 4 weeks. Activities Description Man hours Team size Depends on A Clearing 550 6 Grubbing 550 C Earth work 460 A, B D Base 420 3 Paving 330 F Finish Shoulders 200 1 E Move out 180 1
The labour unit cost of excavation by hand referring to the crew calculations is: O $134.27/m3 O $142.82/m3 O $106.97/m3 O None of the above QUESTION 6 The labour unit cost of excavation by hand referring to the man-hour calculations is: $134.67/m3 O $156.25/m3 $106.76/m3 O None of the above QUESTION 7 The man hour productivity rate for hand trimming is: O 0.52 mh/m2 O 1.13 mh/m2 1.19 mh/m2 None of the above
Given the data of a proposed highway END AREA (sq. m) Free Haul Distance, FHD = 50 m STATION CUT FILL Cost of Borrow = PHP6.00 per cu. m. 2+ 440 70 2+ 740 Cost of Excavation = PHP5.50 per cu. m. 3+ 040 50 Hauling Cost = PHPO.30 per meter station Determine the following: 1. Overhaul Volume 2. Length of Overhaul 3. Cost of Haul 4. Cost of Waste 5. Cost of Borrow

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