From country to city，From the tunnel with only the roar of machines to the noisy ground construction site.， 20 November 9:30，It lasted seven months.，China Railway Shanhe Shield Machine Successfully Runs Through the Low Carbon Station of Shenzhen Metro Line 3～Right line of Pingxi Station，It has taken another solid step in helping to build the Guangdong-Hong Kong-Macao Greater Bay Area.。

It is reported that，South China is known as“Geological Museum”Known as，Long distance、Composite Formation、A series of problems such as many ancient buildings on the surface have also brought great challenges to the construction of Shenzhen Metro Line 3 project.。Low-carbon station～The starting and ending mileage of the right line of Pingxi Station is 967.50m，Maximum burial depth 32.7m，The shield machine starts from the low-carbon city station，Interval needs to underpass karst development area、Site of Xiao's Artillery Tower、Buildings and structures、Rivers and important pipelines, etc.，Finally, the first batch of metro stations constructed by long-arch and large-span assembly under the internal support system in China will be reached.——Pingxi Station，The difficulty of construction is evident。

Faced with such a difficult problem，China Railway Shanhe Project Team has formulated scientific and reasonable shield tunneling parameters.，Pay close attention to slag sample and slag quantity，Timely adjustment of technical means according to the real-time situation，Optimize the tunneling parameters，Scientific use of shield construction means，Follow the principle of double control of grouting volume and grouting pressure，Thickening the grout by adding synchronous、Zhongdun mud injection、Earth bin addition polymer improvement、A series of measures such as strict control of secondary grouting，In particular to the improvement of low-concentration polymer slag soil in a soil bin.、High Efficiency Application of Zhongdun Mud Injection and Synchronous Double Slurry Injection Technology，Ffectively prevent that settlement of the Xiao's artillery tower。

“When working out the construction parameters，The project team shall comprehensively consider the engineering geological conditions within the scope of large and dangerous projects.、Change of covering soil thickness，Construction shall be based on settlement monitoring data.，Implement information construction。”Relevant person in charge introduced，In the spirit of high quality、The principle of high efficiency，Based on safety and reliability，Everyone goes all out to achieve the goal of smooth penetration of the right line.，Finally, a perfect ending was achieved.。

The project took 7 months from the start to the completion.，It is worth mentioning that，Many shield machines of China Railway Shanhe have blossomed everywhere and deeply rooted in South China.。Adhere to“Create value for customers”The idea of，China Railway Shanhe will continue to be of high quality、High standards、High efficiency，Make it green、Environmental protection、Technology、Quality engineering，Helping Dawan District to Build a Beautiful Area。