Trench

The excavation or Künette or Kinette (of cunette French, Italian Cunetta = ditch ) is an elongated Aufgrabungsschacht (including cable trunking or cable trench ) in road construction for pipe laying. The term Künette is mainly used in Austria.

Properties

It is usually dug for the laying of pipes (gas, water, electricity, telecommunications, etc.). At greater depths ( legally from 1.25 m in depth Austria ) or fragile embankment to stabilize the walls of an excavation with wood, in proximity to the ground it is pumped out. The law must excavation of 40 cm in width or less not be entered. At crossing of doorways the excavation should be covered contract safely.

After wiring the decrease and then the filling in layers of excavation and compaction of the material occurs. The restoration of the surface with bitumösen coverings, paving stones, humus, etc., depending on the previous inventory, completes the excavation. After waiting a settling period (eg 6 months ), the final inspection to identify any consequential damage and subsidence.

Rest of stripe

As a residual strip gem in excavations Germany. ZTVA -StB 97 the withdrawal of bound layers beyond the stepped rear section called. This is differentiated depending on the type of layer:

• Rest of stripe widths of bituminous fixed superstructure < 0.35 m width are to be removed in addition to the cut-back, bituminous layers to the brim or to the next joint.
• Rest of stripe widths of the superstructure with concrete floor < 0.50 m width are to be removed in addition to the back -cut, bonded layers to the brim or to the next joint.
• Rest of stripe widths of paved roadway or parking strip < 0.40 m in width or 1/2 sheet width of paving are to be removed next to the cut-back, paved layer to the pavement edge.