A boring machine for producing a trench in the ground including a chassis that extends in a longitudinal direction, the chassis having a lower end, the machine including a boring device mounted at the lower end of the chassis, the boring device including a first boring member which is rotary about a first axis of rotation, and a second boring member which is rotary about a second axis of rotation, the second axis of rotation and the first axis of rotation extending in a plane perpendicular to the longitudinal direction, wherein the first axis of rotation is inclined with respect to the second axis of rotation.

A boring machine for producing a trench in the ground including a chassis that extends in a longitudinal direction, the chassis having a lower end, the machine including a boring device mounted at the lower end of the chassis, the boring device including a first boring member which is rotary about a first axis of rotation, and a second boring member which is rotary about a second axis of rotation, the second axis of rotation and the first axis of rotation extending in a plane perpendicular to the longitudinal direction, wherein the first axis of rotation is inclined with respect to the second axis of rotation.

A roadway access hole drill for cutting a square or rectangular access hole in a roadway having a first saw opposing a second saw and a third saw opposing a fourth saw. A method of cutting a microtrench in which the buried utility is exposed by opening a square or rectangular access hole in a roadway above the buried utility using the roadway access hole drill that is controlled by a computer system connected to an under-roadway detection unit that detects a buried utility and stops movement of the drill to avoid damaging the buried utility.

A roadway access hole drill for cutting a square or rectangular access hole in a roadway having a first saw opposing a second saw and a third saw opposing a fourth saw. A method of cutting a microtrench in which the buried utility is exposed by opening a square or rectangular access hole in a roadway above the buried utility using the roadway access hole drill that is controlled by a computer system connected to an under-roadway detection unit that detects a buried utility and stops movement of the drill to avoid damaging the buried utility.

A bell hole box with an open bottom for protecting construction workers from wall cave-in when working below a surface of the Earth may utilize two, opposing, generally concave walls with generally straight panels portions. The two walls may be connected using multiple spreaders that are pinned or connected to each of the two, opposing walls. Each longitudinal end of the bell hole box is open to permit passage of a pipeline through it. Numerous vertical guard posts may be connected around a top frame rail and joined together with chains. The bell hole box may be lifted in and out of a hole with mounted lifting hooks.

The disclosure relates to a boring machine for producing a trench in the ground, comprising a chassis that extends in a longitudinal direction, the chassis having a lower end, the machine including a boring device mounted at the lower end of the chassis, the boring device including: a first boring member which is rotary about a first axis of rotation; a second boring member which is rotary about a second axis of rotation, the second axis of rotation and the first axis of rotation extending in a plane perpendicular to the longitudinal direction;

wherein the first axis of rotation is inclined with respect to the second axis of rotation.

The disclosure relates to a boring machine for producing a trench in the ground, comprising a chassis that extends in a longitudinal direction, the chassis having a lower end, the machine including a boring device mounted at the lower end of the chassis, the boring device including: a first boring member which is rotary about a first axis of rotation; a second boring member which is rotary about a second axis of rotation, the second axis of rotation and the first axis of rotation extending in a plane perpendicular to the longitudinal direction;

wherein the first axis of rotation is inclined with respect to the second axis of rotation.

A system and method are for detecting and identifying underground tunnels by using: (i) bentonite-slurry for filling at least one essentially-vertical moat along a desired borderline, (ii) at least one detection device associated with the moat(s); and (iii) at least one control system connected to all detection devices.

A system and method are for detecting and identifying underground tunnels by using: (i) bentonite-slurry for filling at least one essentially-vertical moat along a desired borderline, (ii) at least one detection device associated with the moat(s); and (iii) at least one control system connected to all detection devices.

The present invention provides a system and method for detecting underground tunnels by using bentonite-slurry.