Tianjin Duliujian River HDD Crossing Project design pressure is 4MPa, Pipeline diameter is Φ610, with horizontal length 1932M and actual length 1935.33M, Crossing pipe is Φ610×10、L415MB Spiral submerged arc welding pipe.

 

The geology is complex: Grey yellow, brown, rusty, and small amount of shell fragments, no shakeing response, cross section is slightly shiny, surface water and river are salt water. Water level is significantly influenced by outside environment,

 

This ground layer has huge cohesive force, during crossing, drilling equipment has high torque, meanwhile, soil are very easily cohere, which is also hard to cut into small pieces

 

This area is coastal areas, the construction site only a few kilometers from the port, The operating environment conditions are relatively poor.

To face of all these difficulties, HDD crossing Branch company carefully prepared a scientific plan, and conducted a field survey, underground testing, Environmental Response, Developed a scientific and effective construction solutions.

After a period of constructing, the Tianjin project pipeline has successfully dragged through with 1960m, which has proved Zhongtuo Crossing Branch has a wealth of practical experience in the construction of long distance crossing project.

 

Thanks a lot for their hard working with Project manager Shi dezhi, and Wang yanmin, and all staffs, Shao Erqing, cattle sub Lin, Wang Weiliang, Chen Wenliang, Lixin Yong Shen Zhen Chao, Guyong Zhen, Shen Li Po, Li Bo, Shao-Ming Wang. Congratulations to all.