"Jinghua" reproduces!The first section of the longest domestic shield highway tunnel runs through

Correspondent Zong Yue Li Guixiang

On the morning of September 25th, with the precise outlet of the first 16.07 -meter shield machine "Jinghua", the East Sixth Ring Reconstruction Engineering West Line Tunnel was successfully completed by the East Sixth Ring Reconstruction Project in China Railway 14th Bureau. It marks the first section of my country's longest shield highway tunnel.

The Beijing East Sixth Ring Reconstruction Project starts from the south of the Jingha Expressway, and the north to Yiyuan North Street. The total length of the route is about 16 kilometers. The largest diameter shield tunnel under construction in the north is also the largest underground tunnel in Beijing. As a leading enterprise in the industry, the Great Shield of the 14th Bureau of China Railway has set a record of 542 meters in a single month in a single month in the excavation process. , Accumulate valuable experience for the construction of the same type.

Started from May 2021, the "Jinghua" shield machine has successfully reached the middle wind well after 16 months. During the first section of the excavation process, 11 technical problems were successfully overcome the shield -shallow cover, high -risk hanging of shield machines, and long -distance crossing the high sand layer, and successfully crossed the Beijing -Kazakh Railway and the Beijing Urban Sideline Comprehensive Transportation Hub 30. Restricted risk sources. The intermediate well -founded pit where the shield machine arrives is located in the rich water sand layer. The groundwater level is only 10 meters. The construction team places 11 water wells inside and outside the foundation pit reinforcement area. And airbags are installed around the cave gate to ensure construction safety.

In addition, the construction team has organized a review meeting of internal and external experts many times to invite shield experts to consult the pulse. The project department repeatedly conducted technical intercourse on the on -site personnel, formulated a detailed emergency plan, and made sufficient material reserves to ensure that the shield was received smoothly.

It is reported that after the "Jinghua" shield machine conducts a comprehensive inspection, repair, replacement, and replacement in the middle wind well, it completes the second start, and continues to excavate 26 kilometers to the south side of Wan Shengnan Street to receive wells. Essence

After the completion of the Beijing East Sixth Ring Road Reconstruction Project, the former East Sixth Ring Road will pass through the underground tunnel. Other transit cargo transportation will be guided to the peripheral highway system to ensure that the vehicles of citizens are smooth. 12 planning roads and 5 current roads in the urban sub -center will realize east -west and east -west roads, further strengthen the traffic connection between the groups on both sides of the East Sixth Ring Road, and integrate the Tongzhou urban area and the sub -center administrative office area to promote the high -quality development of the sub -center. Essence

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