Soil and rock reinforcements in tunnelling

Pelizza, Sebastiano; Peila, Daniele

doi:10.1016/0886-7798(93)90020-v

Cited by 39 publications

(19 citation statements)

References 4 publications

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“…7) do not change the convergence curve of a tunnel (Pelizza and Peila 1993, Peila 1994, Peila et al 1996, Oreste et al 2004. This is equivalent to saying that the convergence measured at a large distance behind the tunnel face is not affected by the presence of preconfinement measures.…”

Section: Outstanding Issues In the Understanding Of Preconfinement Mementioning

confidence: 96%

“…Until now, all analyses of tunnels with preconfinement have used elasto-plastic models (e.g., Pelizza and Peila 1993, Peila 1994, Peila et al 1996, Wong et al 2000, Oreste et al 2004, Marcher and JiĜiþný 2005. An exception is the study by Bonini et al (2009): the authors, after a review of characterization and modeling of time-dependent behavior in rock, described the mechanical behavior of the Italian scaly clays, a structurally complex Clay Shale (CS) formation of the Apennines (Italy).…”

Section: Ground Time-dependent Behaviormentioning

confidence: 99%

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Tunneling in Difficult Conditions - The Squeezing Case

Tonon

2012

Geotechnical Engineering State of the Art and Practice

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Section: Outstanding Issues In the Understanding Of Preconfinement Mementioning

confidence: 96%

Section: Ground Time-dependent Behaviormentioning

confidence: 99%

Tunneling in Difficult Conditions - The Squeezing Case

Tonon

2012

Geotechnical Engineering State of the Art and Practice

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“…Pipe lines and machines should be cleaned timely and waste grout be taken outward to avoid grout overflow, foundation softening and surrounding rock instability. [10][11][12] IV. ASSESSMENT OF HORIZONTAL PILE WITH JET GROUTING…”

Section: Key Techniquesmentioning

confidence: 99%

Pre-supporting with Horizontal Piles of Jet Grouting in Weak Loess Tunnel

Yang

Xie

Yun-Zhou³

et al. 2009

2009 International Conference on Information Management, Innovation Management and Industrial Engineering

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Considering the characteristics of surrounding rock of one highway tunnel discussed in this paper, pre-supporting with horizontal piles of jet grouting was used in portal section in order to improve the bearing capability of highway tunnel foundation. Diameter, length, longitudinal intervals of horizontal piles of jet grouting were determined preliminary based on calculation and references of some other projects. According to the geological conditions of surrounding rock, different water cement ratios, pressures of jet grouting, velocities of lifting and other construction parameters were put to use to large-scale field test. Diameter, length, 3 d and 28 d compressive strength of all test piles were checked, on which pre-design were adjusted and design indexes, construction parameters were get. Engineering application has proved the strong adaptability and maneuverability, and bearing capability and stability of highway tunnel foundation were improved through this method, therefore, this paper can be used for reference in design and construction of highway tunnel in weak loess.

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“…Subhorizontal jet grouting is a pre-confinement method that reinforces the ground ahead of the tunnel face with jet grouted umbrellas [1,2] (Fig. 1a).…”

Section: Introductionmentioning

confidence: 99%