Trenching And Pipe Laying

Question 1

If you use this size rock for the initial backfilling, no compaction is usually required:

Answer 1

3/4”

Question 2

What equipment should you use for loose gravel that can’t be shored safely, so trench must be sloped, making it 24 to 36 feet at the top and 12 to 8 feet deep ?

Answer 2

Large track hoe to trench the main line, with trapezoid bucket for the top 8 to 10 feet and a 2 foot-wide bucket for the bottom two feet.

Question 3

What is needed for laying a 24 inch pipe into a 23 to 20 foot-wide trench cemented in cobbles ?

Answer 3

Shield