CONSTRUCTION METHOD OF GAS PIPELINE TUNNEL

摘要

PROBLEM TO BE SOLVED: To discharge a spring in the state of clearing the environmental standard by preventing the spring moving along a gas pipeline tunnel from highly alkalizing without contact with the spring from the natural ground with air mortar while filling the conventional air mortar around the gas piping.;SOLUTION: Gas piping 8 is installed in the gas piping tunnel in which a lagging 2 arranged from the side face toward the roof face of an excavated tunnel 1 is supported with a steel made support 3 in an almost U-shape from the the internal measurement of the tunnel. When the air mortar 9 is filled around the gas piping 8, before filling the air mortar 9, a waterproof sheet 6 is laid on the inside of the gas pipeline tunnel from the bottom of the tunnel pit 1 as far as the position higher than at least the underground water level, then the air mortar 9 is filled around the gas piping 8.;COPYRIGHT: (C)2006,JPO&NCIPI