A foundation structure using a micro pile and a method of forming the same.

A cover steel plate is disposed at an upper end of the micro pile, and has a micro pile hole.

The micro pile is connected with others in series thanks to the use of two through eight protrusions formed on a lower end thereof.

There is provided a method for drilling a cased hole and installing a micropile.

A micropile is lowered into the cased hole following the retrieval of the retrievable drill bit.

A micro pile increased in supporting force and horizontal resistance force and a method of constructing the micro pile.

The technique used to bore for a micropile depends basically on the type of ground involved.

For example it is possible to make a pile, a micropile or a tie-rod with enlarged base having a diameter bigger than the diameter of the tool used.

The micropile is a foundation pole with dimensions between 90 and 300 mm in diameter and a variable length from 2 up to 50 meters.

Previously, a conventional marine micropile anchor installed on a seafloor, lake bed or river bed would be subjected to fatigue, corrosion, cracking, uplift and an inability to deal with lateral loading.

The micro pile (10) for connecting a structure (16) to a support layer (14) in the ground comprises a pile body (18) formed of a grout pressurizingly filled in an excavated hole formed in the ground and hardened.

The steel tubes that form the core of the pole can be closed or drilled, through the openings the mortar is filtered so as to form a homogeneous covering, so as to obtain an excellent contact between the soil and the borehole.

The steel tubes that form the core of the pole can be closed or drilled, through the openings the mortar is filtered so as to form a homogeneous covering, so as to obtain an excellent contact between the soil and the borehole.