: a trench cut in a series of steps from the base to the top of a mound for determining the cultural levels of an archaeological site.

What is a trench 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. … Trenching and excavation work presents serious hazards to all workers involved.

What are the types of excavation?

  • Earth excavation is removal of the layer of soil immediately under the topsoil and on top of rock. …
  • Muck excavation is removal of material that contains an excessive amount of water and undesirable soil. …
  • Unclassified excavation is removal of any combination of topsoil, earth, rock, and muck.

What are the three methods of excavation?

  • Mass Excavation. A form of earthwork, mass excavation involves extensive quantities of soil, which has been excavated from the ground at the depth required for the garage or basement. …
  • Structural Excavating. …
  • Site Cut and Fill.

What is the purpose of trenching?

Trenching may be used to create new ditches for installing drainage, retaining walls, electrical or fiber conduit, sprinkler systems and gas, sewer and water lines. It can also be used to create replacement trenches to replace old sewer, water and drain lines with new materials.

What are the methods of trench excavation?

  • Conventional methods: excavators +/- rock breakers.
  • Drill & blast.
  • Trenching.

Is excavation and trenching the same?

Generally speaking, an excavation is a hole in the ground as the result of removing material. A trench is an excavation in which the depth exceeds (is bigger than) the width.

What are two methods of excavation?

  • Shielding.
  • Shoring.
  • Benching.
  • Battering.

What is called excavation?

Excavation is the act or process of digging, especially when something specific is being removed from the ground. Archaeologists use excavation to find artifacts and fossils. There are many types of excavation, but they all involve digging holes in the earth.

What is detail excavation?

Detailed excavation is a type of excavation service that caters specifically to more precise excavating jobs, such as excavations for footings, concrete house slabs, driveway preparation, retaining wall footings and service trenches.

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What is structural excavation?

Structure Excavation means the excavation of on-Site soil materials including trenching required by the Contract Documents to demolish and remove an existing structure or to construct a new structure.

What are the different types of trenches?

There were three different types of trenches: firing trenches, lined on the side facing the enemy by steps where defending soldiers would stand to fire machine guns and throw grenades at the advancing offense; communication trenches; and “saps,” shallower positions that extended into no-man’s-land and afforded spots …

What is the purpose of excavation?

Excavation is the process of moving things like earth, rock, or other materials with tools, equipment, or explosives. It includes earthwork, trenching, wall shafts, tunneling, and underground. Excavation has several critical purposes, including exploration, environmental restoration, mining, and construction.

What is the difference between digging and excavation?

Digging, also referred to as excavation, is the process of using some implement such as claws, hands, manual tools or heavy equipment, to remove material from a solid surface, usually soil or sand on the surface of Earth.

Is standard for excavation?

This Indian Standard ( First Revision > was adopted by the Bureau of Indian Standards, after the draft finalized by the Safety in Construction Sectional Committee had been approved by the Civil Engineering Division Council. … Excavation is one of the important phases of construction in any building activity.

What is foundation excavation?

For small buildings, excavation is carried out manually by means of pick axes, crow bars and spades etc. In case of large buildings and deep excavation, mechanical earth cutting equipment can be used. … Planking and strutting can be intermittent or continuous depending on the nature of soil and the depth of excavation.

What is surface excavation?

surface excavation is simply the excavation of surface soil up to a depth of 150 to 200 CM. Surface excavation is mainly used for civil construction and geotechnical purposes. The soil exposed to climatic conditions is analyzed with RS2 for stress deformation, surface design, and stability of the soil.

What is an example of excavate?

When a home builder digs a big hole to create the basement of a house, this is an example of when he excavates. When scientists carefully dig up dirt because they believe important artifacts are buried underneath, this is an example of when they excavate.

Why do we excavate in construction?

Working Procedure of Excavation The first and primary step involved in the excavation is to find out the extent of soil and Clearing of construction site is of unwanted bushes, weeds and plants. Setting out or ground tracing is the process of laying down the excavation lines and centre lines etc.

Who excavated Harappa?

The Harappa site was first briefly excavated by Sir Alexander Cunningham in 1872-73, two decades after brick robbers carried off the visible remains of the city. He found an Indus seal of unknown origin. The first extensive excavations at Harappa were started by Rai Bahadur Daya Ram Sahni in 1920.

What is timbering trenches?

Timbering is a method of providing temporary support to the side of the trench and is sometimes called planking and strutting. It is a method to prevent trench side soil against the collapse. If the soil is not hard then during deep excavation the sides of the trench collapse.

How do you calculate structural excavation?

So, the formula is: Ab = Wb * Lb, where Wb and Lb are the width and length of the bottom of the excavation. At = Wt * Lt, where Wt and Lt are the width and length of the top of the excavation. In our example, Wb = Lb = 5 and Wt = Lt = 15, so Ab = 5 * 5 = 25 and At = 15 * 15 = 225, and D = 5.

How do you prepare subgrade?

  1. Ensure the compacted subgrade is able to support construction traffic. …
  2. Remove all debris, large rocks, vegetation and topsoil from the area to be paved. …
  3. Treat the subgrade under the area to be paved with an approved herbicide.

What is embankment from borrow?

An Embankment is the portion of the roadbed below the aggregate base and surface courses that is built up in layers consisting of suitable material. … Borrow is material from Contractor-provided sources placed in fill and/or Embankment areas when all suitable Unclassified Excavation material has been exhausted.

What was the first line of trenches called?

The first, or front, line of trenches was known as the outpost line and was thinly held by scattered machine gunners distributed behind dense entanglements of barbed wire. The main line of resistance was a parallel series of two, three, or four lines of trenches containing the bulk of the defending troops.

What are 3 facts about trench warfare?

  • #1 Trench Warfare in WW1 was started by Germans to avoid losing ground. …
  • #2 Hundreds of miles of Trench Systems were built. …
  • #3 Trench systems became elaborate with time. …
  • #4 They were built in a zig-zag pattern. …
  • #5 Trench systems usually had two more supporting lines.

What is a trench in SAP?

Sapping is a term used in siege operations to describe the digging of a covered trench (a “sap”) to approach a besieged place without danger from the enemy’s fire. … Once the saps were close enough, siege engines or cannon could be moved through the trenches to get closer to—and enable firing at—the fortification.

What are the steps involved in the excavation?

Answer: Excavation is the process of moving earth, rock or other materials with tools, equipment or explosives. It includes earthwork, trenching, wall shafts, tunneling and underground. … Some of the different processes used in excavation include trenching, digging, dredging and site development.

What is the difference between a trench and a pit?

New Member. As the terms relate to industry and construction, a “trench” means a narrow excavation such as for a pipeline or building footer. A “pit” means a larger excavation like a mine, quarry or the entire basement area of a building.

What is the difference between a trench and a hole?

is that hole is a hollow spot in a surface while trench is a long, narrow ditch or hole dug in the ground, especially in warfare.

What are trenches used for in construction?

In the civil engineering fields of construction and maintenance of infrastructure, trenches play a major role. They are used for installation of underground infrastructure or utilities (such as gas mains, water mains, communication lines and pipelines) that would be obstructive or easily damaged if placed above ground.