Browse > Article
http://dx.doi.org/10.9711/KTAJ.2019.21.2.301

Development of rapidly hardening seal material applicable to steel pipe multistage grouting  

Shin, Hyunkang (Infrastructure Solution Group, Infra Division, POSCO E&C)
Jung, Hyuksang (Dept. of Railway Construction and Safety Engineering, Dongyang University)
Kim, Donghyun (Dept. of Railway Construction and Safety Engineering, Dongyang University)
Ryu, Yongsun (Chemius Korea Co., Ltd.)
Kim, Donghoon (City Planning Team of Jeju Urban Construction Department)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.21, no.2, 2019 , pp. 301-321 More about this Journal
Abstract
The development of a rapidly hardening seal material applicable to steel pipe multistage grouting is described in this paper. In the multistage technique, seal materials are inserted to prevent the backflow of main grouting material. The grouting material must be inserted only after sufficient time has passed for the seal material to reach a gel state. Otherwise, the fluid seal material mixes with the main grouting material and a backflow of the grouting material occurs, thereby making its in situ insertion difficult. Furthermore, if the seal material remains in the gel state for too long a time, it solidifies; and the main grouting material will not be able to seep into the soil. The gel time, i.e., the time needed for the fluid seal material to turn into a gel state, determines the construction period of steel pipe multistage grouting. The gel time is one of the important factors in this technique, because it impacts the total tunnel construction period significantly. This study develops a rapidly hardening calcium aluminate material, which can reduce the gel time and shorten the construction period while retaining proper sealing function. It also presents a method to determine whether the seal material has reached the gel state as well as the quality standard and bleeding rate testing method for the seal material in the gel state.
Keywords
Steel pipe multistage grouting; Seal material; Seal material gel time; Seal material bleeding; Seal material quality standard;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Korea Rail Network Authority (2018b), Small diameter steel pipe multi-stage grouting construction specification (plan), pp. 2-14.
2 Korea Railroad Research Institute (2018), Study on improvement of steel tube multi-story construction method for rail tunnel reinforcement, pp. 24-38.
3 Masindi, V. (2015), Remediation of acid mine drainage using magnesite and its bentonite clay composite, Doctor of Philosophy Thesis, Graduate School of Environmental Sciences, University of Venda, pp. 41.
4 Storr, M., Murray, H. H. (1986), "Well-ordered kaolinite in siderite concretions from the Brazil Formation, western Indiana", Clays and Clay Minerals, Vol. 34, No. 6, pp. 689-691.   DOI
5 Korea Rail Network Authority (2018a), Report on the mixing ratio test results of sealing material and injection material for reinforcement of steel pipe multi-stage grouting, pp. 16-42.
6 Ahn, J.H. (2018), Evaluation of construction management techniques and standards for the umbrella method, Master Thesis, Graduate School of Global Convergence, Korea National University of Transportation, pp. 11-35.
7 Hong, S., Bae, K., Koo, H., Mun, H., Yoo, Y., Lee, Y., Lee, S. (1994), Development of umbrella arch method for tunneling difficult ground condition, Korea Institute of Construction Technology, pp. 222-225.
8 Korea Rail Network Authority (2016), Construction specification in Donghae line Pohang-Samcheok railway construction section11, pp. 10-75-154.