At 9:18 am on January 21, the first muddy shield machine of changsha metro, "xiang dun no.1", successfully started its journey across the xiangjiang river at lingguandu station of the first phase of line 3.

Party secretary of changsha city rail transit group co., LTD., chairman of the board Peng Xufeng attended the ceremony and announced the shield originating, vice secretary of party committee, general manager castellanos, party secretary of China railway shisiju group company, chairman zhang ting the speeches, changsha rail cleans QingHua party committee member, deputy general manager, deputy general manager cao before and other leaders attended the ceremony.

The first phase of changsha metro line 3 mound port between river station ~ spirit guandu station (hereinafter referred to as the mound to spirit interval) by China railway shisiju group construction, line length 2.65 km, shield nearly distance across the xiangjiang river, karst cave in construction of development zone and the gourd slope - escape the ridge - battery fault zone, such as long range, tight, complex formation and the surrounding environment, for changsha metro line 3 issue of controlling key project. Tunneling in the area is expected to be completed by 30 September.

The first mudwater balance shield tunneling machine of changsha metro crosses xiangjiang river, which is of great significance for the future shield tunneling construction technology control under the same conditions. Changsha railway group will further concentrate its technical advantages, overcome difficulties and form a summary, providing a solid basis and reference for similar subway construction.