Specifications for trench excavation with rock drills

What are the dimensions of a trench?

following dimensions, measured in place:.1 Height: Vertical distance from rock surface to bottom of designed trench..2 Width: Actual width of trench measured h rizontally limited to pipe outside diameter plus 600 mm or th centreline of trench..2 Volume of rock excavation for structures to be d

How much rock can be excavated in a trench or pit?

Rock in trench or pit shall not include material which, in the judgement of the Engineer, can be excavated at a rate of four (4) cubic metres solid or more per hour by a 50hp backhoe in good order and efficiently operated.

How do I determine the volume of rock excavated for trenches?

ayment.1 Volume of rock excavated for trenches to be determined by product o following dimensions, measured in place:.1 Height: Vertical distance from rock surface to bottom of designed trench..2 Width: Actual width of trench measured h rizontally limited to pipe outside diameter plus 600 mm or th

What if a backfill material is found in a trench excavation?

oved by the Engineer of Record, and shall be placed in maximum 12-inch lifts and compacted by suitable and approved compaction. If unacceptable final backfill material is encountered in the trench excavations, it shall be replaced with other suitable material available at the project site

What is the difference between a trench and an excavation?

OSHA defines an excavation as any man-made cut, cavity, trench, or depression in the Earth’s surface formed by earth removal. A trench is defined as a narrow excavation (in relation to its length) made below the surface of the ground.

Which material should be screened during a trenching operation?

The coarser materials shall be well distributed throughout the finer material. Backfill materials that are obtained from trench excavated materials to the extent such material is available, shall be either screened directly into the trench or screened during the trenching operation.