A haul road from a borrow pit to the fill has an adverse grade of 3% and has rolling resistance of 90 lb/ton. What will be the effective grade for the haul?
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A haul road from a borrow pit to the fill has an adverse grade of 3% and has rolling resistance of 90 lb/ton. What will be the effective grade for the haul?
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- 2. A GC plans to use a CAT 632G elevating scraper to construct a road. Scraper weights 38.5 tons with radial tires. The 2-mile haul road between borrow and construction site has a 4% uphill grade. The scraper can carry 21.5 tons of fill. The tire penetration during the haul is 3 inches and the tire penetration on the return is 2 inches. What would be the total resistance and effective grade each way? (hint: on the way return, the scraper is empty)2. Determine the balanced hauls and indicate the direction of haul for the mass diagram shown below. The LPH is 4,000 ft. Also, show on the profile what cut sections will be hauled to what fill sections, and indicate any borrow or waste sections. Calculate the average haul distance for each. balanced haul.. 75000 50000 25000 0 -25000 -50000 -75000 0 Distance along centerline, ft 14000 15000Examples of the different loading types: i. Linearly increasing vertical loading on a strip ii. Embankment type of loading
- A belt conveyor is required to deliver crushed limestone having a bulk density of 75 lb/cu ft at the rate of 200 tons/hr. The conveyor is to be 200 ft between center of pulleys with a rise of 25 ft. The largest lumps are 4 in. and constitute 15% of the total. The conveyor will discharge over the end. For a belt speed of 200 fpm, what is the minimum width of belt that can be used? Calculate the horsepower for the drive motor.In construction of a highway section, the earthwork information is available as shown in the table below. The free-haul distance is 500m and the swelling factor is 20%. Draw the mass haul diagram between station 3 + 00 and station 9 + 00 and determine the extra compensation that must be paid to the contractor when the overhaul price is $200/m3 station.Define Plastic Composite Piles
- State the different types of piles according to its function and construction?c) Several different items are used in the design and construction of piles, including: i) Engineering Analysis ii) Field Load Tests Discuss the above itemsDesign testing and detection scheme for bridge bearing capacity, illustrate the equipment and materials used in the testing.
- State the method to determine the N-value of soil and the normal N-value required for supporting friction pilesQ1: In construction of a highway section, the earthwork information is available as shown in the table below. The free-haul distance is 500m and the swelling factor is 20%. Draw the mass haul diagram between station 3 + 00 and station 9 + 00 and determine the extra compensation that must be paid to the contractor when the overhaul price is $200/m3 station. Station Cut Fill 3 + 00 50 250 4 + 00 150 550 6+ 00 150 200 7+ 00 910 50 9 + 00Solution
