A three-dimensional static numerical model of a complex underground structure in high squeezing ground

Tina Marolt, Jakob Likar

Research output: Contribution to journalArticle

Abstract

The present study assesses high squeezing ground confirmed by empirical and semi-empirical theories. High squeezing ground is often present in underground constructions at great depths, but it is hardly ever researched separately from light and fair squeezing ground. A three-dimensional, static numerical model is developed for a complex underground structure consisting of a shaft, a silo, and a mine roadway at great depth, which is certainly in high squeezing ground. Furthermore, a solution for the entire structure based on shotcrete with incorporated yielding elements is provided. The yielding elements, in general, absorb the strain energy by compressing at a relatively constant stress, but without rebounding. A three-dimensional, static numerical model of a support system with incorporated yielding elements is established in order to demonstrate that the presented forces are under control. Therefore, a failure of the lining is avoided because the stresses in the shotcrete lining are below its load-bearing capacity. It can be concluded that yielding elements incorporated in the shotcrete lining play an important role in the support solution in high squeezing ground.
Original languageEnglish
Pages (from-to)4-15
Number of pages12
JournalActa Geotechnica Slovenica
Volume12
Issue number1
Publication statusPublished - 2015

Keywords

  • high squeezing ground
  • numerical model
  • underground structures
  • deformations
  • yielding support element
  • podzemni objekti
  • deformacije
  • iztisljiva hribina
  • numerični model

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