June twenty sixth，Completion of assembly of the last ring of segments on the right line of the low-white interval，It marks the successful completion of the shield construction task of the fourth phase of China Railway Shanhe Shenzhen Metro Line 3.。

East Extension of Shenzhen Metro Line 3（Phase IV）The line of the project starts from Shuanglong Station, the terminal station of the existing Line 3.，Laid along Longgang Avenue and Pingxi Road，End at Pingdi Liulian Station。

Low Carbon City Station～Baishitang Station Section is a double-track tunnel.，The shield method is used for construction，The shield machine starts from Baishitang Station.，Receive and lift at Low Carbon City Station，Left line 1168.5m，Right line 1148m，Min. Radius 450m，The section is provided with a connecting passage and a wastewater pump house.，Steel sleeve is used for launching and receiving.，At the starting end of small mileage of Baishitang Station, jet grouting piles are used for end reinforcement.。

To ensure that the interval is connected on time，The project team is problem-oriented.、By means of innovation、Take timely penetration as the goal and task。For karst cave formation，Combined with the actual situation on site，After many comparisons、Simulation test、Field test，A set of key technologies for shield interval construction under the geological conditions of the interval are studied.，And successfully applied to the construction.。When crossing the Dingshan River，The builders fought day and night.，Designated personnel are on duty，Omnibearing tracking and monitoring shield machine、Structure and surface condition，Summarize the tunneling parameters。At the same time，The actual soil yield and theoretical soil yield of each ring were compared，Strictly maintain the earth pressure balance at the excavation face.，Reduce disturbance to the soil，Prevent over-excavation and under-excavation，Ensure smooth, safe, high-quality, efficient and steady progress of shield machine，It effectively guarantees the safety of people and vehicles above the ground.。

The shield tunnel of the low-white section is the key node of the construction period of the fourth phase of Shenzhen Metro Line 3.，Smooth penetration of the shield section，It has laid a solid foundation for the early operation of the fourth phase of Shenzhen Metro Line 3.，At the same time, it has accumulated valuable experience for the shield construction of China Railway Shanhe in Guangdong-Hong Kong-Macao Greater Bay Area.。