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

What are the advantage of the augered-excavation cast-in-place piles?

Be aware of the problems that may occur during excavation and techniques to control them

Read the question carefully and give me answer according to the question  Describe situations in which drilled shafts would be preferable to driven pile foundations

A contractor is to excavate an area of 350′ × 150′ to a depth of 9′ and haul it by dump truck to a site where it is to be used for fill. The soil will then be fully compacted. If the swell factor is 25 percent and the shrinkage factor is 18 percent. Estimate the total bare cost for the job (excavation only) using a 2½ CY front-end loader, track mounted. Consider average nation price. Use the crew below.

A 5 m deep excavation is required in a dry sand where g 517.5 kN/m3 and f9 5 328 (see Figure 18.11). Determinethe actual depth to which the sheet pile has to be driven andthe required section (from Table 18.1), assuming allowablestress of 190 MN/m2. Use the net pressure diagram.Dactual 5 1.3Dtheory

State the method to determine the N-value of soil and the normal N-value required for supporting friction piles

Describe the important advantages of driven piles.

Why would it be inappropriate to design a drilled shaft using a static analysis method developed for driven piles?

. (25 points) A CAT 385FCS shovel is loading well-blasted rock (Fill Factor=85%) on a highway project. The average face height is expected to be 22’. Most of the cut will require a 150 degree swing of the shovel to load the haul units. What is a conservative production estimate in bcy/hr if the swell is 60%? Assume a 50-min/hr efficiency. Cycle time under ideal conditions is 35s. The optimum digging height (or depth) is 50% of the maximum digging height (or depth). To use table: Percentage of optimum height = Average Face Height/ Optimum Digging Height   HINTS: Obtain required dimensions of the shovel from CAT44, Chapter 7. No need to interpolate from given table. Use closest value.