"Report to the operator's room, tool No. 36 has been replaced. During the Spring Festival, 35 meters below the Yangtze River, in the operation room of the "Wanjiang Struggle" shield machine of the 14th Bureau of China Railway, Li Xiaoyu, the supervisor of the right line, marked a red mark on the schematic diagram of the cutterhead, and thus they completed the scheduled tool replacement operation of the shield machine through the fault zone.
Li Xiaoyu marks on the schematic diagram of the cutterhead.
The fault zone is the section with the highest risk level in the whole line, and the rock mass of this formation is broken and the soil cover is thin, which is easy to cause problems such as slurry at the bottom of the river and stuck cutterheads. Li Xiaoyu said that the construction risk of the fault zone is extremely high, and it is necessary to ensure the integrity of the equipment and achieve a one-time crossing without stopping.
To this end, they formulated a detailed maintenance plan for the shield machine, planned to check 484 items during the Spring Festival, and also formulated a tool change plan according to the tool monitoring system and the changes in the tunneling parameters of the shield machine to ensure that the shield machine is in a "healthy state". Now, with the completion of the tool change work, the "Wanjiang Struggle" shield machine began to prepare for the intensive work before the repush, and planned to complete the most difficult interval crossing in one go.
Busy construction site.
At 300 meters behind the "Wanjiang Struggle", there was a hot scene in the "Wanjiang Fuxing" shield machine, the roar of the machine was endless, and the segment hoisting machine kept shuttling, tunneling and assembling ......The builders are methodically carrying out the construction of the project, tackling the last 40 meters of full-section rock formation.
Located at the 'big bend' of the Anhui River section of the Yangtze River in Wuhu, Anhui Province, Wuhu Chengnan River Crossing Passage is the first river crossing tunnel in Anhui Province and is known as the 'first tunnel of the 800-mile Anhui River'. The 3,965-meter shield tunnel adopts a two-pipe two-way design with an outer diameter of 14 segments5 meters, two oversized diameters 15The 07-meter slurry balance shield is tunneling in the same direction. Guo Jianhao, the shield manager of the project, said that at present, the double-line shield machine has excavated more than 5,000 meters, and 65% of the total progress has been completed.
During the Spring Festival, the double line will be excavated to the south bank of the Wanjiang River at full speed, and nearly 200 builders chose to stick to the first line and work together to play the "New Year Overture" on the bank of the Wanjiang River, presenting a warm scene of "Shuanglong" advancing and striving to cross the Yangtze River.
Xu Xiaoqiu controls the shield machine to dig forward.
In front of the shield machine control screen, the captain Xu Xiaoqiu is concentrating on the cutterhead torque, cutterhead speed, tunneling speed, excavation situation and other parameters, and skillfully controls the shield machine weighing thousands of tons to excavate forward, "I must always check the shield tunneling parameters, control the shield tunneling attitude, and deal with any abnormal situation in time." Xu Xiaoqiu said that the construction of the fault zone is extremely difficult, and he applied to stay behind early to ensure the smooth excavation of the shield machine. This year's Spring Festival is also the third consecutive Spring Festival he has spent on the project.
The construction site of a 35-meter tunnel under the Yangtze River.
In order to ensure that the builders who stick to the front line have a good year, the project organized a variety of activities according to the actual situation during the Spring Festival. "We prepared a sumptuous Chinese New Year's Eve dinner and 'New Year' blessing packets, gathered everyone together to make dumplings, watch the Spring Festival Gala, and held a variety of cultural and sports activities, so that the 'relatives' in Tiannan and Haibei had an auspicious year. Ju Zhenhua, the secretary of the project, said that during the period, the project will arrange some on-duty personnel to monitor the situation in the tunnel in real time and monitor the construction site 24 hours a day to ensure that the tunneling is foolproof. (China Railway 14th Bureau).