1887

Abstract

Summary

The Nordic method for tunnelling consists of drill and blast, pre-grouting and rock support adapted to the geologic conditions. Extensive use of pre-grouting is normally applied to limit water leakage. The injection is stopped at a predetermined pressure or total volume of injected grout ( ). However, little is known about the dissemination of the grout within the host rock. The aim of this project is to better understand the grouting distribution in the fractures. The research is associated with the research program True Improvement in Grouting High pressure Technology for tunnelling (TIGHT) funded by the Norwegian research council. The objective of TIGHT is to increase understanding and subsequently implement efficient grouting control in tunnelling. The ultimate purpose is to reduce material consumption and time spent for grouting.

Geophysical instrumentation was developed to carry a crosshole Ground Penetration Radar (GPR) investigation in a pre-grouted tunnel wall. The GPR tomography results have been compared to the data recorded in the drilled cores. Preliminary results indicate that crosshole GPR can provide valuable information on the distribution of fractures filled with grout or filled with water.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201800428
2018-04-09
2020-01-21
Loading full text...

Full text loading...

References

  1. EliassenK.E.
    [1956] A survey of ground conductivity and dielectric constant in Norway within the frequency range 0.2–10 Mc/s. Norwegian Defence Research Establishment report, 26 pp.
    [Google Scholar]
  2. Hognestad, H.O., Fagermo, J.I., Kveen, A., Backer, L., Grøv, E., Frogner, E. and Aarset, A.
    [2010] Praktisk berginjeksjon for underjordsanlegg. Norsk forening for fjellsprengningsteknikk, 6, 98 pp.
    [Google Scholar]
  3. Holmøy, K.H., Strømsvik, H. and Riise, T.
    [2015] State of the art for sementbasert forinjeksjon. SINTEF report, 26 pp.
    [Google Scholar]
  4. KongF.N., Bhasin, R.K., Wang, L.Z. and Zhang, Y.G.
    [2012] Development of handheld GPR using FieldFox network analyzer and its application in detecting structure of Qian Tang river dike, Hang Zhou, China. 14th International Conference on Ground Penetrating Radar, Shanghai, China.
    [Google Scholar]
  5. Stille, H.
    [2015] Rock Grouting - Theories and Applications. Stiftelsen bergteknisk forskning, Stockholm, 139 pp.
    [Google Scholar]
  6. Zhang, F., Xie, X. and Huang, H.
    [2010] Application of ground penetrating radar in grouting evaluation for shield tunnel construction. Tunnelling and Underground Space Technology, 25, 99–107.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201800428
Loading
/content/papers/10.3997/2214-4609.201800428
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error