Successful project located in Hangzhou, China

There is one vent pipe on the south side (DN600) and one on the east side (DN800/DN600) of the initial sedimentation tank area of the box. The bottom elevation of the vent pipe on the south side is -2.95m~-3.09m; The bottom elevation of the vent pipe on the east side is -3.00m~-3.30m, and the burial depth is about 9m~9.5m. 91.5m south vent pipe; The east vent pipe is 78.2m long. A total of five working wells are designed, including φ One 3290 working well, φ Four 2590 working wells.

The construction of micro top pipes in this project is DN600-100.7m, DN800-69m, with a total of 5 steel casing sunken shaft

Long distance pilot measurement control is a key and difficult point. The long construction distance of the pipeline in this project is 69m, which belongs to long-distance micro jacking construction and requires high directional accuracy. In the process of micro pipe jacking crossing, pilot construction is crucial, and the effectiveness of pilot construction will affect the curve of top pulling pipe excavation. Therefore, in order to ensure that the pipeline does not deviate from the design, it is necessary to ensure the accuracy of ultra long distance pilot construction measurement.