pipeline and tunnel excavation using a composite device trenchless laying method

摘要

The present invention relates to a pipeline and tunnel excavation trenchless laying method using a composite device, in more detail Corner subspace complex drilling equipment and pipelines and tunnels using the same non-buried pipelines in part, except for the multipurpose circular portion of the buried pipe embedded in the space part of the Mesa drilling unit of a polygon in order to solve the problems that have their conventional method By forming a drilling method the efficacy can be enhanced by embedding double. ; Another thing drilling composite material further comprises a stretching device that is installed in the president Face supporting a front portion of the mesa drilling apparatus of the polygon equipment and improve the stability of the soil pressure of the pipelines and tunnels them using trenchless construction methods mesa buried drilling equipment due to the stretching of the polygon by re-configuring ardent supporter of Sikkim as well as in accordance with the omission of the ardent support film method compared to conventional sediment Face can reduce the cost of materials.