ZHANG Yong-jin,HE Wei.Key Technology of Large Diameter Built?in Semi?buried Water Supply Steel Pipe in Shield Tunnel[J].China Water & Wastewater,2023,39(16):77-82.
Key Technology of Large Diameter Built?in Semi?buried Water Supply Steel Pipe in Shield Tunnel
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第16期
Page:
77-82
Column:
Date of publication:
2023-08-17
- Abstract:
- The upstream trunk main section of water distribution project outside Jiaxing City needs to pass through the urban area of Hangzhou City, and the semi-buried steel pipe with nominal diameter of DN3 200 is adopted in the shield tunnel to make full use of urban space resources. A concrete or cement mortar foundation is set at the bottom of the delivery pipe, and three SBS linoleum isolation layers are set between the foundation and the shield segment. The steel pipe is installed continuously in the shield tunnel without setting expansion joint. The friction between the foundation and the pipe segment in the middle of the tunnel restricts the temperature deformation of the pipe after delivering water, and the relative axial deformation between the steel pipe and the tunnel segment within the range of 0-450 m at both ends is compensated by the expansion joint set at the end of the pipe. This type of structure has the advantages of saving urban space resources and friendly environment. The extra space in the tunnel can be used as the maintenance passage of the pipeline and the weak current utility tunnel.
Last Update:
2023-08-17