A casing-tube cutter bit applicable to both-directional rotation and having high excavation performance is provided. A casing-tube cutter bit includes a mounting part constituted by two members facing each other at a predetermined interval, and an excavation part formed continuously with the mounting part and having a leading end at which a plurality of ultrahard chips are disposed at a predetermined interval, the excavation part includes a central part, and first and second tilt parts tilted on both sides of the central part, the first tilt part is formed in a first length at a first tilt angle, the second tilt part is formed in a second length at a second tilt angle, the first tilt angle is equal to the second tilt angle, and the first length is shorter than the second length.

The present invention provides a tool for forming an underground cast-in-situ pile having an enlarged base, the tool comprising: a first pile-forming member having a first base-forming member; a second pile-forming member having a second base-forming member, the pile-forming members extending collinearly and being movable in a longitudinal direction relative to one another between: a digging state wherein the base-forming members are proximate to one another so that the pile-forming members can be driven underground; and a base-forming state wherein the base-forming members are spaced from one another so as to form an underground void between the first and second base-forming members, the void being tillable with a flowable fill to form the enlarged base of the underground cast-in-situ pile; and jack screw means, rotation of which causes relative longitudinal movement between the pile-forming members.

The present invention provides a tool for forming an underground cast-in-situ pile having an enlarged base, the tool comprising: a first pile-forming member having a first base-forming member; a second pile-forming member having a second base-forming member, the pile-forming members extending collinearly and being movable in a longitudinal direction relative to one another between: a digging state wherein the base-forming members are proximate to one another so that the pile-forming members can be driven underground; and a base-forming state wherein the base-forming members are spaced from one another so as to form an underground void between the first and second base-forming members, the void being tillable with a flowable fill to form the enlarged base of the underground cast-in-situ pile; and jack screw means, rotation of which causes relative longitudinal movement between the pile-forming members.

The invention relates to a foundation engineering method and a construction apparatus for producing a columnar structure in the ground, in which a foundation engineering tool is driven in a rotating manner about an axis of rotation and introduced with a feeding motion into a ground, wherein the columnar structure is produced in the ground. According to the invention it is provided that during the production of the columnar structure a rotating motion and a feeding motion of the foundation engineering tool are recorded over time and forwarded to an evaluation unit, in that by means of a sensor means at least one further processing parameter is recorded over time during the production of the columnar structure in the ground and is forwarded to the evaluation unit and in that by the evaluation unit a three-dimensional model of the columnar structure is produced and displayed.

A drilling machine includes a main body, a mast to mount a drilling tool, a kinematic mechanism movably constraining the mast to the main body while allowing mutual rotation. The kinematic mechanism includes an elongated component hinged at two ends. When the drilling machine is in a drilling configuration, the elongated component performs a structural function to constrain the mast to the main body. An assembling and moving equipment includes a moving element movably mounted to the drilling machine and supporting the elongated component. A moving actuator controls the relative position between the moving element and a mounting portion of the drilling machine. When the drilling machine is in an assembling configuration, one end of the elongated component is released and the moving element acts upon the elongated component. Moving the moving element relative to the mounting portion of the drilling machine causes rotation of the elongated component.

A drilling machine includes a main body, a mast to mount a drilling tool, a kinematic mechanism movably constraining the mast to the main body while allowing mutual rotation. The kinematic mechanism includes an elongated component hinged at two ends. When the drilling machine is in a drilling configuration, the elongated component performs a structural function to constrain the mast to the main body. An assembling and moving equipment includes a moving element movably mounted to the drilling machine and supporting the elongated component. A moving actuator controls the relative position between the moving element and a mounting portion of the drilling machine. When the drilling machine is in an assembling configuration, one end of the elongated component is released and the moving element acts upon the elongated component. Moving the moving element relative to the mounting portion of the drilling machine causes rotation of the elongated component.

A pile ground anchoring member is disclosed which includes an elongate member having a longitudinal axis, and an anchoring portion connected to the elongate member. The anchoring portion has a plate and also an arcuate member that is radially spaced from the elongate member. The plate has an arcuate distal edge. The plate is connected to the elongate member at a non-perpendicular angle to the longitudinal axis. The arcuate member is located on the arcuate distal edge of the plate. The plate has a leading portion which includes a lower portion of the arcuate distal edge that extends beyond the arcuate member and engages the earth as the pile is screwed into the ground.

Provided is a casing protection bit mounted on a casing tube in combination with a cutter bit to prevent abrasion or chipping of the cutter bit. The present invention is to provide a casing protection bit 1 to be mounted on a casing tube, the casing protection bit including: a base portion 2 that protrudes in an axial direction of the casing tube, the base portion having a mountain shape; and two leg portions 3 and 4 extending continuously with the base portion 2 and facing each other at a predetermined distance. In the casing protection bit cemented carbide tips 5a to 5j are disposed on all planes of the base portion 2 except for a plane from which the leg portions 3 and 4 extend.

Provided is a casing protection bit mounted on a casing tube in combination with a cutter bit to prevent abrasion or chipping of the cutter bit. The present invention is to provide a casing protection bit 1 to be mounted on a casing tube, the casing protection bit including: a base portion 2 that protrudes in an axial direction of the casing tube, the base portion having a mountain shape; and two leg portions 3 and 4 extending continuously with the base portion 2 and facing each other at a predetermined distance. In the casing protection bit cemented carbide tips 5a to 5j are disposed on all planes of the base portion 2 except for a plane from which the leg portions 3 and 4 extend.

A pile is disclosed which includes an elongate member having a longitudinal axis, and an anchoring portion connected to the elongate member. The anchoring portion has a plate and also an arcuate member that is radially spaced from the elongate member. The plate has an arcuate distal edge. The plate is connected to the elongate member at a non-perpendicular angle to the longitudinal axis. The arcuate member is located on the arcuate distal edge of the plate. The plate has a leading portion which includes a lower portion of the arcuate distal edge that extends beyond the arcuate member and engages the earth as the pile is screwed into the ground.