On the afternoon of February 28, 2022, with the roar of excavators, the construction of the No. 2 horizontal tunnel of Tianzhushan No. 1 Tunnel, the control tunnel of the Xi-10 high-speed rail line, was officially started. The construction site marks the official entry into the main construction stage of the Xi Shi high-speed railway project with 6 bids.

The machinery was officially constructed at the No. 2 horizontal hole

Tianzhushan No. 1 Tunnel is a key and difficult control project for the construction of the West Ten High-speed Railway (Shaanxi Section). The tunnel has a total length of 14,742 meters and a design speed of 350 kilometers per hour. It is a single-hole double-track tunnel with a line spacing of 5 meters. The main line of the tunnel is a CRTS I type double-block ballastless track structure, which is constructed using the auxiliary tunnel mode of 1 horizontal guide + 2 transverse holes + 1 inclined shaft. The No. 2 horizontal hole undertakes the construction task of 2059 meters, the horizontal guide construction task of 3120 meters, The construction task of Zhengdong is 4988 meters, which is the key construction line of the whole line.

Tianzhu Mountain No. 1 Tunnel Route Map

The maximum buried depth of Tianzhushan No. 1 Tunnel is about 690 meters. Groundwater and bedrock fissure water are relatively developed, and the possibility of inrush water (mud) is high. and fold core, the rock mass is broken, and surrounding rock instability such as collapse and deformation may occur, and the overall construction risk is high.

Held a technical preparatory meeting for the entry of the No. 2 horizontal tunnel of Tianzhu Mountain No. 1 Tunnel

In order to ensure that Tianzhushan No. 1 Tunnel will be constructed according to the established construction period nodes and successfully complete the construction period target of Xicheng Company's "1335", the project planned ahead and faced difficulties. The ten high-speed rail 6-standard projects vary, and actively strengthen communication with all parties, organize and hold a number of special meetings, and deploy related work. Select an experienced and professional construction team with sufficient resources and equipment, and strictly implement the construction team, start-up report, and start-up standardized acceptance and approval procedures. Through contact, the project processed and transported steel arches and pipe sheds in Xikang 4 standard of China Railway 11th Bureau, using commercial concrete, and made every effort to seize the temporary construction of projects such as No. 2 mixing station, No. 2 steel bar processing plant and steel bridge, and urged No. 2 Hengdong was the first to meet the conditions for entering the hole, laying a solid foundation for the scheduled opening of the Xishi high-speed railway.

In the next step, the West Ten High-speed Railway Project 6 will take this entry as an opportunity to strictly implement the spirit of the superior's instructions, take the safety and quality control as the starting point, open the construction progress bar, calculate the management cost account, concentrate and be pragmatic. Work hard, quickly set off a boom in the project, and write a new chapter in the construction of the West Ten High-speed Railway. Editor/He Yuting