or microtunnelling is a tunnel construction technique used to construct utility tunnels from approximately 0.5–4 m.

The idea for the deep foundation is basically developed to overcome the weakness of the first layer of the soil and to transfer the loads from the weak.

is a technique used by oil-extraction companies in order to access oil in underground reserves.

is a construction method for reinforced concrete walls, generally lift and stair core walls. This has a number of benefits.