A trench is a type of excavation or in the ground that is generally deeper than it is wide (as opposed to a wider gully, or ditch), and narrow compared with its length (as opposed to a simple hole or pit).
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What is a narrow trench called?
canyon. A long, deep, narrow valley with steep cliff walls, cut into the Earth by running water and often having a stream at the bottom. 1.
What is trench give an example?
1. The definition of a trench is a long, narrow ditch sometimes dug by troops during wartime to hide from enemies. A long narrow ditch dug in World War I to protect troops from being seen by the enemy is an example of a trench. noun.
What is a trench simple definition?
1a : a long cut in the ground : ditch especially : one used for military defense often with the excavated dirt thrown up in front.
What is a trench in water?
Ocean trenches are long, narrow depressions on the seafloor. These chasms are the deepest parts of the ocean—and some of the deepest natural spots on Earth.
Is a trench a hole?
A trench is a type of excavation or in the ground that is generally deeper than it is wide (as opposed to a wider gully, or ditch), and narrow compared with its length (as opposed to a simple hole or pit).
What is a construction trench?
Trenching in construction means creating a narrow excavation below the surface of the ground by using an earthmoving machine called a trencher. Trenches are deeper than they are wide, as opposed to a ditch, and more narrow compared to their length, as opposed to a hole or pit.
How many feet is a trench?
The Mariana Trench is 6033.5 fathoms deep. Knowing that it is (11,033 meters (36,201 feet) deep, how do do we perform the conversion to fathoms?
Why are trenches full of water?
Much of the land where the trenches were dug was either clay or sand. The water could not pass through the clay and because the sand was on top, the trenches became waterlogged when it rained. The trenches were hard to dig and kept on collapsing in the waterlogged sand.
What is the word class of trenches?
(ˈtrɛntʃɪz ) plural noun. a system of excavations used for the protection of troops, esp those (the Trenches) used on the Western Front in World War I. Collins English Dictionary.
Where are trenches formed?
Trenches are long, narrow depressions on the seafloor that form at the boundary of tectonic plates where one plate is pushed, or subducts, beneath another.
What is trench digging?
What is meant by a trench and an excavation? 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 is a trench in ww1?
Trenches were common throughout the Western Front.
Long, narrow trenches dug into the ground at the front, usually by the infantry soldiers who would occupy them for weeks at a time, were designed to protect World War I troops from machine-gun fire and artillery attack from the air.
What are the 5 ocean trenches?
The Five Deeps Expedition was the first to reach the deepest point in each of the Earth’s five oceans: the Puerto Rico Trench in the Atlantic, South Sandwich Trench in the Southern Ocean, Java Trench in the Indian Ocean, Challenger Deep in the Pacific and Molloy Deep in the Arctic.
What do you call to the deepest part of the ocean floor?
Ocean trenches
The Mariana Trench, for example, is the deepest place in the ocean at 36,201 feet.
What is a drainage ditch?
(ˈdreɪnɪdʒ dɪtʃ ) noun. agriculture. a ditch that excess water drains into.
When a trench is 4 feet or more in depth?
A stairway, ladder, ramp or other safe means of egress shall be located in trench excavations that are 4 feet (1.22 m) or more in depth so as to require no more than 25 feet (7.62 m) of lateral travel for employees.
Is a trench a confined space?
Trenches are not considered confined spaces based on the risk of structural collapse alone, but will be confined spaces if they potentially contain concentrations of airborne contaminants that may cause impairment, loss of consciousness or asphyxiation.
How does a trench collapse?
A trench collapses when its walls fail to contain the pressure of the tones of soil pressing on it. Even though this can be problematic in any depth, it can accelerate if other materials are piled at the edge.
What are the 4 types of trenches?
- Front-line Trench. This type of trench was also known as the firing-and-attack trench.
- Support Trench. This trench was several hundred yards behind the front-line trench.
- Reserve Trench. The reserve trench was several hundred yards behind the support trench.
- Communication Trench.
What is the bottom of an excavation called?
So that we can be consistent in our terminology, let’s look at the parts of a trench: WALL: (FACE, SIDES) the sides of the trench. BOTTOM: (BASE, FLOOR) the bottom of the trench. SPOIL: the pile of excavated earth that was removed to form the trench. The leading edge of this pile is called the TOE.