Umbrella pipe is applied with 130 mmx hole diameter, 6-8° hole perspective and 6.3 mm meat thickness, 9 m length, 11.6 cm diameter pipes. After plastering of head part of assembled umbrellas, cement syrup is injected into the pipe. Cement injection goes on until cement injection comes back from the return pipe. Thus, the inside part of the pipe and the gap between the pipe and the hole is filled with cement syrup. With umbrella pipe application, tilted belt and axial and horizontal tensions of rock-foundation complex is prevented; deformation dynamic is minimized. It is an indispensable support for safe excavation sites.
