Sand
Sand is a natural sediment of granular, mainly siliceous, products of rock weathering. Particles are smaller than 2 mm, are […]
Glossary
Glossary
Fine grained cohesive soils
Fine grained cohesive soils, such as clays, are a natural deposit of the finest siliceous and aluminous products of rock
Glossary
Frost heave
Where the water table is high, that is near the surface, soils, such as silts, chalk, fine gritty sands and
Glossary
Made up ground
Areas of low lying ground near the coast and around rivers close to towns and cities have been raised by
Glossary
Trial pits
To make an examination of the subsoil on a building site, trial pits or boreholes are excavated. Trial pits are
Glossary
Unstable ground
There are some extensive areas of ground in this country where mining and excavations for coal and excavations for taking
Glossary
Subsoil drains
Subsoil drains are used to improve the run off of surface water and the drainage of ground water to maintain
Glossary
Herring bone system
In this system, illustrated in Fig. 19B, fairly regular runs of drains connect to spine drains that connect to a
Glossary
Grid system
This is an alternative to the herring bone system for draining one way slopes where branch drains are fed by