Shenzhen Metro Line 5 "Shen'an No. 1" shield machine successfully started

Correspondent Liu Fuchang Liu Pei Li Guixiang

On the morning of June 16th, the "Shen'an No. 1" shield machine, Shenzhen Metro Line 5, which was responsible for the construction of the Big Shield Company of China Railway 14th Bureau, started behind Huangbeiling Station, marking the full entry of Shenzhen Metro Line 5 West Extension Project. Shield excavation stage.

Shenzhen Metro Line 5 project starts from the post -phase Huangbeiling Station of Line 5. It passes through Dongmen Road Station and Construction Road Station to the Grand Theater Station. The total length of the line is 2.88 kilometers. Among them, the shield range range is 1.85 kilometers in length, the outer diameter of the tunnel pipe is 6.2 meters, and two composite soil pressure balance shield machines with a diameter of 6.47 meters are used.

This line is located on the Shennan Avenue, known as Shenzhen's "Chang'an Street". The urban transformation is frequent, the traffic flow is saturated, the construction of the building is dense, the underground pipeline is staggered, and the shields cross the risk. As many as 23 places, cross -subway line No. 2 is parallel across the line, and it is close to the existing line 1. The construction of the station is easy to lead to the existing risk and increase the risk of operating lines. Five street channels and 6 important construction buildings are across the streets, especially at a 29 ‰ slope to wear the Guangshen Railway Bridge. , "Cortex" piercing needle lead.

At the same time, the geological geology is complicated, the terrain is low, the sand layer is covered, and the upper soft and hard compound floor is crossed through the sand layer, facing technical problems such as the slow excavation speed of the shield machine, the strictness of the digging posture, and the severe knife wear. The requirements for anti -sedimentation and leak prevention measures are extremely high, and the construction is difficult.

Experts with similar engineering construction experience, this project has a variety of high -risk superposition and concentration, and the surrounding environment is sensitive. It is a "big test" for the construction of subway tunnel construction projects. Essence

The operator driving the shield machine

In order to ensure the successful start and excavation of the "Shen'an No. 1" shield machine, Shenzhen Metro Group Co., Ltd., China Railway Construction South Construction Investment Co., Ltd. and other units jointly play the technical advantages of the Grand Shield team to fully adjust management and technology Resources, continuously optimize the construction plan, and strengthen the control of safety details; the project leadership team clarifies the division of responsibilities, all employees set their responsibilities, actively play the role of exemplary leadership, and truly achieve resources, enough measures, full time, and complete safe and efficient completion. The "Shen'an No. 1" shield machine started the process of acceptance and acceptance, and achieved the goal of the start of June, which laid the foundation for the successful start of the "Shen'an No. 2" shield machine on the right. New stage of construction.

It is reported that after the project is completed, the function of improving Metro Line 5 as the trunk of the rail transit is improved, and the convenience and accessibility of the travel of the surrounding citizens will be improved.

- END -