The first double line synchronization of the roadheader in Qingdao Metro Line 2
Recently, at the eastern end of Taishan Road Station on line 2 of Qingdao metro, two DSUC double shield tunnel Hard Rock Roadheader (TBM, commonly known as "drill dragon") has successfully achieved double track connection. This case is in Qingdao for the first time.
On the spot, at the construction site of more than 30 meters underground at the intersection of Liaoning road and Taishan Road, it is hard to see that hard granite is able to resist the attack of large earthworm. The TBM of the left line continued to strike hard granite, and 41 of the hob rotated, and the silt, rock and water around it fell down.
Soon, the left line of the windows of paper by pierce. At the same time, the right line of the "drill earthworm" yuezhanyueyong. 11 noon, Terry interval (Taishan Road Station - Lijin Road Station) left and right through the line at the same time.
According to reports, Terry interval by two double shield TBM tunnel construction, the right line TBM in April 2015 during excavation, the left line TBM in July 2015 during excavation. Starting from the Jiali plant oil plant, heading to Taishan Road station, the length of the left line heading is 505.2 meters, and the right line heading length is 543.2 meters.
"Drilled dragon" in Taishan Road station through, will be transferred to the first hair of the Kerry plant oil plant two starts, is expected to "start" again in late November.
It is understood that, in order to successfully complete the excavation task, the Metro has organized many experts at home and abroad for discussion and demonstration. Combined with the actual situation of Qingdao, timely optimize and adjust the TBM design parameters, so that the TBM can adapt to the geological conditions of Qingdao.
Although the Qingdao granite in the domestic city are among the most hard, which is doped with weathered granite and rupture zone, geological faults, TBM boring machine is designed, through some dangerous and sad points after the two roadheader finally open up the underground, ride the wind and waves, again to refresh people's miracle.
