Thirty-six stations of TBM boring machine have been built on the west coast of Qingdao Metro Line 1

The first TBM boring machine originates in the West Coast of Qingdao Metro

on site

The second TBM line 1 is put into use

On the morning of July 19th, at the People's Square Station of the Metro Line 1 in the West Coast New District, the first TBM “Drilling Dragon” on the west coast started up. After more than ten minutes of operation, the TBM “Drilling Dragon” began to slowly advance. . It is reported that the construction interval is under the responsibility of the China Railway Tunnel Group and is part of the 01 civil engineering section of the 1st line of the Qingdao Metro Line 1. The total length of the 01 line is 5.5 kilometers, including "one station and five intervals", namely, the People's Square Station and the Jinggangshan Road Station. People's Square Station Interval, People's Square Station - Hengshan Road Station Interval, Hengshan Road Station Interval - Tianmushan Road Station Interval, Anzi East Station - Xuejiadao Station Interval, Xuejiadao Station - Xuewa Wind Well Interval.

This TBM roadheader will be departed from the People’s Square Station to the Tianmushan Road Station and will be empty after passing through Hengshan Road Station. It will be transferred from the Tianmushan Road Station to the Anxueming Tunnel for secondary departures and finally arrive at Xuejiadao Station No. 1 The wind tunnel was lifted and the length of the TBM tunneling was 3.5 km. A total of seven geological faults were broken through. It is worth mentioning that the assembly and commissioning of the entire TBM machine took only 30 days to complete, refreshing the latest record of TBM assembly in Qingdao Metro.

“Today TBM has originated and represents the development direction of tunnel construction. The entire No. 1 line is 18.9 kilometers by the mine method, 33.44 kilometers by the mechanical method, and the proportion of mechanized construction has reached 66%.” Vice President of Qingdao Metro Line 1 Co., Ltd. Zhao Guangquan, the manager, introduced that the traditional mine construction excavation speed is generally 40 to 60 meters per month. In areas with poor geological conditions, only 30 meters can be excavated, and the mechanized construction of the tunnel boring machine is used for monthly excavation. The number of meters can reach more than 300 meters, which has obvious advantages in construction speed. In addition, the number of mechanized construction workers is small. The main use of electronic control operations is to form one-step structural concrete, which greatly reduces the risk of collapse.

It is reported that "This is the second TBM put into use on Line 1 and the first TBM on the west coast of Line 1. In a few days, the second one on the West Coast will also be put into use." Zhao Guangquan introduced Metro Line 1 With a total length of 60 kilometers, in addition to the mine law interval, 8 TBM boring machines and 12 shield machines are planned to be put into use. Currently, 2 TBMs and 6 shield machines have been put into use. Line 1 has thus become the highest degree of mechanization in the city’s current subway line.

First TBM boring machine on the West Coast

Secret

Laser guidance, the error does not exceed 5 cm

According to reports, since the construction of Qingdao Metro Line 2 for the first time adopted TBM and EPB shield machines, Qingdao Metro began to explore the use of mechanized construction. At present, the safety hole of Line 2 has been implemented, providing reference for the use of mechanized construction for Line 1 and Line 8. The construction of the subway lines 1 and 8, which are currently under construction, has adopted mechanical construction. Compared with the traditional mine method, the safety of mechanical construction is high, and the environmental impact caused by noise and vibration is small. The most important is the progress. On the TBM, the length of excavation can reach up to 10 meters.

The author was informed that TBM is a kind of comprehensive equipment that uses mechanical crushing of rocks, rakes, and supports for continuous operation. It integrates optical, mechanical, electrical, hydraulic, and sensory information technologies, and it has the theme of excavation and cutting, and transports stone files. Assembled tunnel lining, measurement, guidance, correction and other functions, but also in accordance with different geological "tailored" design and manufacturing, reliability requirements are extremely high. “The speed of TBM tunneling is controlled by our driver.” Li Wei, driver of TBM on line 1 of the driving team, told the author that he has been engaged in this work for five or six years and participated in the construction of three subway lines, including participation in Qingdao. The construction of Line 2 and Line 1 was completed. He said that every day he has to walk into the operation room of the TBM equipment, and adjust the attitude at any time according to the geology, hardness, and water content in advance, and control the speed of the cutterhead and the driving speed, and how much the cylinder pressure and the amount of slag are removed. The driver is in control.

“The tunnel boring machine is connected to the satellite through a laser guidance system. During the underground excavation, the deviation between the upper and lower sides will not exceed 5 cm. It can also be adjusted automatically through satellite positioning. It is very advanced.” Li Wei said, after TBM excavation, cross-section A tunnel with a diameter of 6.3 meters was formed and it was no longer necessary to do primary support and secondary support separately as in the drilling and excavation method. Workers could directly "fine-tune" the tunnel.

Staff operating in TBM control room

progress

36 stations have been built

It is reported that the entire line of the Metro Line 1 runs from north to south, with a total length of about 60 kilometers, forming a fast rail transit corridor that links the north and south of Qingdao. The line runs from Emeishan Road Station in the West Coast New District to Dongguzhuang Station in the Chengyang District in the north, and connects Huangdao, Tuandao, Zhongshan Road, Taitung and many other core areas through the Huangdao Bus Station, Qingdao Railway Station, and the Railway North Railway Station. The important transportation hubs such as Liuting International Airport and North Bus Station are the north-south to fast rail transit corridors connecting the west coast city area, the east coast city area, and the north coast city area, and can be used to transfer to and from multiple lines in the track line network.

Zhao Guangquan introduced that there are 40 underground stations, 2 depots, 1 parking lot, 1 control center, and 1 main transformer substation. At present, apart from 3 stations, there are 21 subway cutting line stations, currently 20 are in the main construction phase, of which 11 are in the main structure construction stage and 4 main bodies are capped; 16 underground excavation stations have been fully opened. In the construction, four of them completed the penetration of the arch, and one has entered the construction phase of the main structure. On July 15th, the main structure of the Gulao Village Station in Chengyang District was capped and became the first open-cut station on Line 1 to complete the construction of the main structure of the station. In addition, the first batch of excavation stations including the Templehead Station, the North Bus Station, and the West Coast New District of the Chengyang District will also complete the construction of the main structures in the third quarter.

significance

Subway will attract more major projects

According to relevant persons from the West Coast New Area, there are currently two lines of Metro Line 1 and Line 13 in the West Coast New District. Since the construction of the subway, the West Coast New District has attached great importance to actively cooperate with and supporting the construction of the subway, and has made every effort to promote related work. On the 1st line, the West Coast New District had 124 houses and 40,000 square meters of houses to be demolished in the early period. 116 lines of various types of pipelines have been relocated and rehabilitated, and 100,000 trees and 60,000 square meters of trees have been replanted and rehabilitated. Eight major road traffic diversions have been carried out. Through a series of measures, it has effectively guaranteed the implementation of the project.

“The opening of Metro Lines 1 and 13 will play a very important role in promoting the development of the West Coast New Area.” Zhou Shuyu, Director of the Finance Coordination Department of the West Coast New Area Rail Office, said that the completion of the subway will speed up traffic and ease traffic. The significant role of stress is obvious. In addition, development zones, Guzhenkou Military and Civil Integration Innovation Demonstration Zone, Lingshan Bay Movie and Television Culture Zone, Dongjiakou, and Modern Agriculture Demonstration Zones can be connected. At the same time, Tangdao Bay Binhai Park and the city’s balconies can be connected. Scenic spots, Dazhu Mountain, Xiaozhu Mountain and other scenic spots are linked together to promote regional development. More importantly, the opening of the subway is equivalent to the new economic driving force for the West Coast New District, which can play a leading role in economic development and help attract more major projects to the West Coast New District.