• 17.1 Introduction

  • 17.2 Construction of the Sangatte Shaft

  • 17.3 Ground improvement in the tunnels

  • 17.4 Ground treatment from ground surface

  • 17.5 Ground treatment of ancillary workings from the service tunnels

  • 17.6 Grouting behind the Land Service Tunnel lining

  • 17.7 Conclusions

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