Metro Line 1 is the second subway line in Taiyuan City, which has been attracting the attention and expectations of the public since the official start of construction last year. Next, there is a good news to tell you, this morning, the construction of Metro Line 1 ushered in a major progress: the first shield machine of the whole line was officially launched.
Feng Tao, Secretary of the Party Committee and General Manager of Taiyuan Rail Transit Line 1 Construction and Operation Co., Ltd.: I announce that between East Taibao and the South Inner Ring Road, the shield machine on the right line has begun to excavate.
Reporter Zhang Xiaoliang: This is Taiyuan, Shanxi, and the Dongtaibao Station of Metro Line 1 is under construction. At 10:18 this morning, the first inter-section tunnel shield boring operation of Metro Line 1 started smoothly here. On my right hand side, I can see that this earth pressure balance shield machine called Jinlong No. 1 has begun to slowly turn the cutterhead.
After the first EPB of Metro Line 1 starts from Dongtaibao Station, it will be bored from south to north for 890 meters, and finally arrive at Nanneihuan East Street Station, thus opening up the subway tunnel between the two stations. Considering the special geomorphological environment of the Dongshan area, the construction party adopted the construction method of silicification slurry reinforcement in the shield tunnel after multi-party comparison and scheme demonstration.
China Railway 15th Bureau Taiyuan Rail Transit Line 106 Standard Mechanical and Electrical Deputy Chief Engineer Cheng Xiaoxuan: Where we are now, the landform is Dongshan Loess Plateau, the collapsing loess is more serious, and after the collapsing loess is soaked, its strength will decrease, which is easy to cause collapse and deformation of the formation.
Liu Pu, chief engineer of the 106 bid project of Taiyuan Rail Transit Line 1: The shield segments that we see now are assembled to form a tunnel structure, and inside the structure we have reserved grouting holes for grouting, forming a solid "armor" on the outside of the structure to ensure safety during operation and use.
In shield boring, the construction party also widely applies smart tunneling and visual construction technology to lay observation points for sensitive structures along the line, monitor settlement data in real time, adjust shield boring parameters in a timely manner, effectively control ground settlement, and ensure the safe, environmentally friendly and efficient advancement of shield boring machines. In addition to the shield launch of Dongtaibao Station, the construction of all stations on Metro Line 1 is also steadily underway.
Pan Xiaogang, General Contracting Department of Taiyuan Rail Transit Line 1 Consortium of China Railway Construction Investment Group: Immediately after we will start the left line of the section, we expect that there will be six more shield machines to start within the year, and we have a total of 29 civil construction start points on the whole line, 26 of which have been started so far, and 3 are left. In addition, most of the excavation of the main structure of the station is being carried out at this stage, and we expect that by the end of next year, most of the main structure of the station will be completed. (Reporter Zhang Xiaoliang)
Source: Taiyuan Radio and Television News Channel