Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
advance-slope method
References
Britannica AI Icon

advance-slope method

tunneling
Written by
The Information Architects of Encyclopaedia Britannica

The Information Architects maintain a master list of the topics included in the corpus of  Encyclopædia Britannica, and create and manage the relationships between them.
The Information Architects of Encyclopaedia Britannica
Last updated

Quick Summary

The advance-slope method is a tunneling technique used for continuous concreting, originally developed for hydropower penstocks. In this method, several hundred feet of forms are set, then collapsed in sections and moved forward after the concrete gains sufficient strength. This process keeps pace with the continuously advancing slope of fresh concrete. An example of its application is the Libby Dam's Flathead Tunnel in Montana, which achieved a concreting rate of 300 feet per day using this technique. This method is part of modern rock tunneling practices that involve specialized equipment for placing concrete within the tunnel.1

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
3 Britannica Sources
  1. tunnels and underground excavations - Concrete lining
  2. tunnels and underground excavations - Shield tunnels
  3. tunnels and underground excavations - Ground support

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.