At the beginning of the new year，“The Greater Bay Area”News of victory came。9:30, January 4，China Railway Shanhe Shield Machine Successfully Runs Through the Low Carbon Station of Shenzhen Metro Line 3～Left line of Pingxi Station，It marks that all the double lines in this area are connected.。

Face the difficulties，Go ahead

Long distance in this section、The stratum is complex and changeable, and there are protected cultural relics on the surface.，In addition, the project team initiated the steel sleeve.、Lack of experience in receiving，As a result, the difficulty of the project is greatly increased.。

The starting and ending mileage of the section left line is 976..748m，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。

  

In order to meet the needs of rapid development of rail transit construction in Shenzhen,，On the basis of safety management and control, the project team，The details of the control is to achieve the ultimate.，It greatly ensures the continuous and efficient shield construction.。

The project is difficult，The fighting spirit is not diminished

For Xiao's Artillery Tower Site、The dilemma of karst development area and the uncertainty of long-distance loose composite strata and underground pipelines，The 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，Increase synchronous thickening grouting、Zhongdun mud injection、Earth bin addition polymer improvement、Strict control of secondary grouting etc.，Follow the principle of double control of grouting volume and grouting pressure，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。In the spirit of high quality、The principle of high efficiency，Based on safety and reliability，The project team spares no effort to achieve the goal of smooth penetration of the left line.，Finally, a perfect ending was achieved.。

  

The smooth completion of the tunnel in Pingdi section once again shows that the team of China Railway Shanhe is particularly able to bear hardships.、A spirit of dedication that is especially capable of fighting，This not only laid a solid foundation for the smooth opening of the East Extension Line of Shenzhen Metro Line 3.，It has also won a good reputation for the company in the subway market.。

2023，China Railway Shanhe will be ready to go.、Go all out，Continue to contribute to the construction of Guangdong-Hong Kong-Macao Greater Bay Area。