ISSN 2096-4498

   CN 44-1745/U

二维码
  • Home
  • Solicit Contributions
  • Writing Requirements
  • Editorial Board
  • Council Members
  • Publication Ethics
  • Open Access
  • Advertising
  • Contact Us
  • 中文

Tunnel Construction >

2023 , Vol. 43 >Issue 1: 48 - 57

DOI: https://doi.org/10.3973/j.issn.2096-4498.2023.01.005

Calculation of Surface Settlement Caused by SShaped Spatially Curved Pipe Jacking: a Case Study of Panqiao Substation Pipe Jacking Project in Ningbo, China

  • XU Youjun ,
  • MENG Yixin ,
  • ZHANG Chao ,
  • HAN Zhiqiang ,
  • GUO Fei ,
  • GAO Shenglei
Expand

  • (1.School of Civil Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia,China;2. Academician Workstation of Mine Safety and Underground Engineering,Inner Mongolia University of Science and Technology, Baotou 014010,Inner Mongolia,China;3.Engineering Research Center of Urban Underground Engineering at Universities of Inner Mongolia Autonomous Region,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia, China;4.Beijing Municipal Construction Group Co.,Ltd.,Beijing 100079,China)

Online published: 2023-02-16

Fold

Abstract

To investigate the behavior of surface settlement caused by Sshaped spatially curved pipe jacking for tunnel constructions, a calculation method is proposed to obtain the surface settlement caused by Sshaped spatially curved pipe jacking, based on Mindlin′s elastic solution and the random medium theory. The surface settlements are obtained in the construction of the spatially curved section considering various parameters of pipe jacking and formation loss. The calculated results are compared with the measured surface settlements of the pipe jacking tunnel project of Panqiao substation, Ningbo, China. The results show that: (1) By considering the additional load caused by pipe jacking and horizontal and vertical overbreak clearances, the results from the proposed method agree well with the measured results, indicating that the proposed method can accurately predict the actual surface settlement. (2) The surface settlement groove caused by spatially curved pipe jacking is not symmetrical with respect to the central axis of pipe jacking. When there is no overbreak cutter on the cutterhead, the maximum settlement shifts to the outside of the curve, and the overbreak gap generated by plane turning of the pipe jacking machine can dramatically affect the deviation of the surface settlement groove. (3) During the pipe jacking process, the stratum loss causes most of the surface settlement. Therefore, the grouting parameters should be strictly controlled, and the theoretical grouting amount should be the sum of the grout volumes within the annular and over the excavation gaps.

Key words： S-shaped curved pipe jacking tunnel; Mindlin′s solution; random medium theory; surface deformation

Cite this article

XU Youjun , MENG Yixin , ZHANG Chao , HAN Zhiqiang , GUO Fei , GAO Shenglei .

Calculation of Surface Settlement Caused by SShaped Spatially Curved Pipe Jacking: a Case Study of Panqiao Substation Pipe Jacking Project in Ningbo, China

[J]. Tunnel Construction, 2023 , 43(1) : 48 -57 . DOI: 10.3973/j.issn.2096-4498.2023.01.005

Options
Outlines

/

〈 〉

Support by Beijing Magtech Co.ltd support@magtech.com.cn