Florida Institute of Technology Trenching And Excavation OSHA Soil Type Essay
Question Description
Background: You are excavating a 100 ft long x 4 ft wide x 10 ft deep utility trench. The soil is a cohesive silty loam with an unconfined compressive strength qu = 2 ksf. You plan to use shoring constructed of upright sheeting and hydraulic bracing as shown. The hydraulic cylinders are 5 feet apart horizontally. Your company already owns the shoring material. You estimate that it will cost $225 in labor to install it.
1. Design the same 10 foot deep trench as a sloped excavation with no bracing following OSHA guidelines.
a. What OSHA soil type is this? Explain.
b. Is benching allowed for this soil type? Explain.
c. Sketch the required trench cross section without benching. Label vertical and horizontal extents of the excavation and label the slope of the sides.
2. For the trench above:
a. What volume of excavation is required for the shored solution?
b. What volume of excavation is required for the sloped solution?
c. The cost for excavation, backfill and compaction is $2.50/bcy. Is it cheaper to install shoring or to slope the excavation (disregard time impacts)?
3. Research an accident involving a vehicle or motorized piece of equipment. Write a ½ page description of the accident and describe safety measures that would have prevented the accident.
Have a similar assignment? "Place an order for your assignment and have exceptional work written by our team of experts, guaranteeing you A results."