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In archaeology, the "trench method" is used for searching and excavating ancient ruins or to dig into strata of sedimented material. In geotechnical engineering , trench investigations locate faults and investigate deep soil properties.
Issues such as the effectiveness of certain trench layouts or the percentage of the site to be dug (normally around 5% at present) are widely discussed. Whether an effective picture of past human activity on a site can be truly estimated through this methods is widely debated.
There are two main types of trial excavation in professional archaeology both commonly associated with development-led excavation: the test pit or trench and the watching brief. The purpose of trial excavations is to determine the extent and characteristics of archaeological potential in a given area before extensive excavation work is undertaken.
Trench warfare is a type of land ... Māori did invent trench-based defences without any offshore aid— some believe they may have influenced 20th-century methods of ...
Trench Undergrounding - Another method for undergrounding power lines is to dig trenches, lay power lines into the trench and cover them back up. This is done for the length of the power line. [17] Duct Bank - A third method uses parallel conduits held by spacers with sand or concrete filled in-between the conduits.
Future U.S. President Thomas Jefferson also did his own excavations in 1784 using the trench method, on several Native American burial mounds in Virginia. His excavations were prompted by the "Moundbuilders" question ; however, his careful methods led him to admit he saw no reason why ancestors of the Native Americans of his time could not have ...
Selection of a trench excavation method must take into account a range of rock and machine properties. It is suggested that the advantages of using chain trenchers in suitable rock outweigh the limitations and may have cost benefits and fewer adverse environmental effects compared with alternative methods.
While a trench is being excavated to create a form for a wall, it is simultaneously filled with slurry (usually a mixture of bentonite and water). The dense but liquid slurry prevents the trench from collapsing by providing outward pressure, which balances the inward hydraulic forces and also retards water flow into the trench.