Portable drill rig for boring underground inverted arcuate paths

摘要

A portable drill rig having an inclined ramp is transportable in discrete sections with each section of the inclined ramp forming a separate truckbed chassis. In erection the front portion of the ramp is swung upwardly with on-site lifting apparatus. Support legs are pendulously swung down and landed on portable landing pads to support the medial section of the front ramp in an angular inclined position. The rear ramp section is lifted at the medial rig section and its large supporting legs allowed to pendulously swing on the ground towards their eventual position. A pin registry is made between the two ramp sections so that the partially erected ramp appears not unlike an apex of a roof. The rear portion of the ramp is then erected to its full angularly inclined position and pinned. Provision is made to utilize a traveling car mounted for movement on the ramp sections for the erection of the ramp legs on both ramp sections.