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 >

2022 , Vol. 42 >Issue 9: 1514 - 1520

DOI: https://doi.org/10.3973/j.issn.2096-4498.2022.09.002

Research and Application of Anticracking and Seepage Prevention Approaches for a Working Shaft Sidewall Concrete in Yangtze River Tunnel in Jiangyin, Jingjiang, China

  • WANG Jun ,
  • LI Ming ,
  • WANG Yujiang ,
  • TIAN Qian ,
  • LI Shilong ,
  • LI Min
Expand

  • (1.Jiangsu Transportation Engineering Construction Bureau,Nanjing 210004,Jiangsu,China;2.State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Research Institute of Building Science Co.,Ltd.,Nanjing 210008,Jiangsu,China;3.College of Materials Science and Engineering,Southeast University,Nanjing 211189,Jiangsu,China;4. China Railway 14th Bureau Group Co.,Ltd.,Jinan 250101,Shandong,China;5.China Railway 14th Bureau Group Mega Shield Construction Engineering Co.,Ltd.,Nanjing 211800,Jiangsu,China)


Online published: 2022-10-10

Fold

Abstract

A multifield coupling mechanism model that simultaneously considers materials, structure, environment, and construction factors is adopted to quantitatively evaluate the cracking risks of sidewall concrete and prevent leakages caused by the shrinkage cracking of working shaft sidewall concrete and the uncompacted combination between sidewalls and a ring frame beam. Then, anticracking control indices are proposed. second, Investigations reveal that the selfcompacting and anticracking performances of sidewall concrete with medium and low cementitious materials are well realized by adopting control technologies of viscosity and double regulation on hydration and expansion history of the concrete. Finally, the construction measures, including controlling mold temperature using a cooling water pipe, optimizing the pouring spacing and rate, insulation and moisture curing, a complete technical scheme of anticracking and seepage prevention of the working shaft sidewall concrete with large volume, and stepwise casting, are proposed. the engineering application results show that: The sidewall concrete is tightly connected with a ring frame beam, no crack and leakage appears in the working shaft sidewall with a maximum length of 53.6 m, and the cumulative onetime pouring length and thickness of 120 and 1.5 m, respectively.

Key words： shield tunnel; working shaft sidewall; anticracking and seepage prevention; selfcompact concrete; crack control

Cite this article

WANG Jun , LI Ming , WANG Yujiang , TIAN Qian , LI Shilong , LI Min .

Research and Application of Anticracking and Seepage Prevention Approaches for a Working Shaft Sidewall Concrete in Yangtze River Tunnel in Jiangyin, Jingjiang, China

[J]. Tunnel Construction, 2022 , 42(9) : 1514 -1520 . DOI: 10.3973/j.issn.2096-4498.2022.09.002

Options
Outlines

/

〈 〉

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