Experience from pre-excavation and leakage closing injections obtained in the Follo Line Project

被引：0

作者：

Gollegger J. ^{[1
]}

机构：

[1] Bane Nor, The Follo Line Project, Oslo

来源：

Geomechanik und Tunnelbau | 2022年 / 15卷 / 05期

关键词：

Construction works; Drainage and sealings; Ground water management; Grouting; Hydrology; injections behind segmental lining; leakages; lining concepts; Mechanized tunneling; pre-excavation grouting; Railway tunnels; Support; watertightness;

D O I：

10.1002/geot.202200010

中图分类号：

学科分类号：

摘要：

More and more projects use single-shell segmental lining for rock support as well as water and frost protection. Unless the potential water pressure is very high, i.e., above several hundreds of meters, these lining structures are usually built as undrained fully watertight tunnels. The Follo Line Project included a considerable amount of pre-excavation grouting to reduce the water ingress during construction and invested a lot in injections to close leakage points after the tunnel excavation had finished. This article discusses the various types of injections and reflects critically the use of single-shell linings for tunnels with high water pressure. © 2022 Ernst & Sohn GmbH.

引用

页码：550 / 554

页数：4