Abstract
In rock tunneling, pre-excavation grouting (or, pre-injection) refers to systematic treatment of the rock mass ahead of an advancing tunnel face via pressure grouting. The main purpose of pre-excavation grouting is to reduce water inflows, or to improve geomechanical properties of the rock mass. This paper summarizes approaches for treating competent rock masses with systematic pre-injection of cementitious grouts through boreholes drilled from the working tunnel face. The focus is on traditional cement based grouting technology and drill-and-blast tunneling under high static groundwater pressures (> 20 bar). Post-injection, where drilling and grouting is performed somewhere behind the tunnel face, provides an additional means for achieving a high degree of watertightness, but is beyond the scope of this paper.
Originalsprache | englisch |
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Seiten (von - bis) | 141-146 |
Seitenumfang | 6 |
Fachzeitschrift | Geomechanics and Tunnelling |
Jahrgang | 12 |
Ausgabenummer | 2 |
DOIs | |
Publikationsstatus | Veröffentlicht - 1 Apr. 2019 |
ASJC Scopus subject areas
- Geotechnik und Ingenieurgeologie
- Tief- und Ingenieurbau
Fields of Expertise
- Sustainable Systems