Yielding elements – requirements, overview and comparison / Stauchelemente – Anforderungen, Überblick und Vergleich

Moritz, Bernd

doi:10.1002/geot.201100014

Cited by 40 publications

(10 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Over the past two decades, a series of yielding elements have been developed and improved, for instance, the FFU element [ 16 ], Meypo, DeCo-grout, Complex [ 25 ], and Telescope yielding element [ 36 ], in order to make their mechanical performances more suitable for the deformation behaviors of shotcrete and squeezing grounds. Broadly, according to their manufacturing materials, all yielding elements available can be divided into two groups: Porous concrete-based element and steel-based element [ 37 ]. A further sub-classification of steel-based element is also possible, which includes steel pipe-based element and steel plate-based element.…”

Section: Main Types Of Yielding Elementsmentioning

confidence: 99%

“…However, this type of yielding element showed a quite unstable load-displacement behavior due to the buckling of steel pipes. To overcome such a problem, tunnel engineers working at the Institute for Rock Mechanics and Tunnelling, Graz University of Technology, Austria, attempted to add shorter guiding pipes in length and insert them in those steel pipes, thus optimizing the buckling route of pipe elements [ 37 ], which is the so-called “Lining stress controller” (LSC).…”

Section: Main Types Of Yielding Elementsmentioning

confidence: 99%

“… Comparison of supporting characteristic curves between stiff lining and ductile lining [ 35 ]. Reproduced with permission from [ 37 ]. …”

Section: Figurementioning

confidence: 99%

“…Ductile linings were first applied in the Galgenberg tunnel, Austria, in 1994, where the yielding elements consisted of groups of axially loaded steel pipes having some manufactured local weakness, and the large squeezing deformations occurring were successfully overcome by using the yielding elements in shotcrete linings [ 30 ]. Due to the great advantages of ductile lining in tunnel squeezing deformation control, many research efforts have been made to continuously develop and improve high-performance yielding elements over the past two decades [ 31 , 32 , 33 , 34 , 35 ], such as the glass fiber reinforced plastic element (FFU) [ 16 ], telescope yielding element [ 36 ], and lining stress controller element [ 37 ]. Of course, good applications of these yielding elements in shotcrete linings have been also achieved in many tunnel cases, for instance in the Tauern tunnel in Austria [ 38 ], the Lyon-Torino Base tunnel connecting France and Italy [ 31 , 39 ], and the Yangshan tunnel in China [ 32 , 33 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

“…Of course, good applications of these yielding elements in shotcrete linings have been also achieved in many tunnel cases, for instance in the Tauern tunnel in Austria [ 38 ], the Lyon-Torino Base tunnel connecting France and Italy [ 31 , 39 ], and the Yangshan tunnel in China [ 32 , 33 , 40 ]. In Table 1 , a brief summary of famous tunnels throughout the world is provided, where large squeezing deformations were satisfactorily controlled by applying ductile linings [ 18 , 25 , 30 , 31 , 32 , 33 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ]. In many international conferences, including World Tunnel Congress [ 18 , 27 , 44 , 45 , 46 ], International Rock Mechanics Congress [ 16 , 36 , 47 , 48 , 49 , 50 , 51 ], and many other conferences [ 42 , 52 , 53 , 54 , 55 ], much attention has been paid and hot discussions raised on the topic of design and use of ductile linings in squeezing rock tunnels.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Tunnel Squeezing Deformation Control and the Use of Yielding Elements in Shotcrete Linings: A Review

Zheng

Shao

et al. 2022

Materials

View full text Add to dashboard Cite

Shotcrete lining shows high resistance but extremely low deformability. The utilization of yielding elements in shotcrete lining, which leads to the so-called ductile lining, provides a good solution to cope with tunnel squeezing deformations. Although ductile lining exhibits great advantages regarding tunnel squeezing deformation control, little information has been comprehensively and systematically available for its mechanism and design. This is a review paper for the purpose of summarizing the development history and discussing the state of the art of ductile lining. It begins by providing a brief introduction of ductile lining and an explanation of the importance of studying this issue. A following summary of supporting mechanism and benefits of ductile lining used in tunnels excavated in squeezing ground conditions is provided. Then, it summarizes the four main types of yielding elements applied in shotcrete lining and introduces their basic structures and mechanical performances. The influences of parameters of yielding elements on the supporting effect are discussed and the design methods for ductile lining are reviewed as well. Furthermore, recommendations for further research in ductile lining are proposed. Finally, a brief summary is presented.

show abstract

Section: Main Types Of Yielding Elementsmentioning

confidence: 99%

Section: Main Types Of Yielding Elementsmentioning

confidence: 99%

“… Comparison of supporting characteristic curves between stiff lining and ductile lining [ 35 ]. Reproduced with permission from [ 37 ]. …”

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Tunnel Squeezing Deformation Control and the Use of Yielding Elements in Shotcrete Linings: A Review

Zheng

Shao

et al. 2022

Materials

View full text Add to dashboard Cite

show abstract

Verformungsverhalten von Betonen mit ausgeprägtem plastischen Stauchvermögen

Plückelmann

Breitenbücher

2020

Beton und Stahlbetonbau

View full text Add to dashboard Cite

Für besondere Anwendungsfälle, wie beispielsweise Stauchschichten im Tunnelbau, liegen bereits erste Ansätze für Mörtel und Betone vor, die durch ein ausgeprägtes plastisches Stauchvermögen charakterisiert sind. Der vorliegende Beitrag beschreibt Versuche zum Stauchverhalten unter Querdehnungsbehinderung von stark porosierten Betonen mit geringer Druckfestigkeit (< 5 N/mm2). In die Versuche wurden Betone mit verschiedenen kompressiblen Additiven (Blähglas/EPS) und unterschiedlichen Wasserzementwerten einbezogen. Des Weiteren wurde das Verformungsverhalten sowohl unter Teilflächen‐ als auch Vollflächenbelastung untersucht, um unterschiedliche anwendungsbezogene Randbedingungen abzudecken. Auf Grundlage der ermittelten Spannungs‐Verformungskurven sowie Gefügeuntersuchungen von Proben vor und nach den Stauchversuchen konnten wesentliche Erkenntnisse zum Stauchverhalten der Betone gewonnen sowie material‐ und versuchstechnische Einflussfaktoren identifiziert werden.

show abstract

Study on the time‐dependent interaction between surrounding rock and yielding supports in deep soft rock tunnels

Wu,

Song,

Zhao

et al. 2023

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

As yielding supports can deform without being damaged, the yielding principle has attracted significant attention for tunnelling in squeezing ground compared with the heavy support method. The deformation energy of surrounding rock can be managed using yielding supports that maintain the rock pressure within the bearing capacity of the supports. However, although the yielding principle has been often applied in practical scenarios, a design method for yielding supports has yet not been well developed. This study discusses interaction between the squeezing ground and yielding supports and investigates the influence of the time‐dependent behaviour of rock on the yielding supports. The yielding supports can be implemented by the movement of sliding joints of steel arches or by shortening the yielding elements inserted in shotcrete linings. The deforming process of yielding supports can be divided into three stages: elastic a, yielding, and elastic b. A three‐stage pressure‐displacement relationship of yielding supports is proposed and a method is provided for the calculation of the support stiffnesses of yielding supports in different stages. Furthermore, a unified design approach for the yielding supports is presented and the theoretical model is established after simplifying the asymmetry of problem. The analytical solution for tunnel displacement and support pressure in a tunnel supported by the yielding supports is obtained. The proposed design method for the yielding supports is successfully applied to the Saint Martin La Porte access tunnel, and the mean tunnel deformation in this tunnel is appropriately predicted by the analytical solution. Additionally, a parametric investigation is performed based on the analytical solution, and the effects of yielding path, yielding displacement, support thickness, and installation time of the yielding supports are discussed. Finally, certain highlights of the analytical model of yielding supports in this study are identified, compared with other researches, and recommendations for the design of the yielding supports are provided. The outcome of this research has potential applications in the preliminary design of deep tunnels in squeezing ground.

show abstract

Yielding elements – requirements, overview and comparison / Stauchelemente – Anforderungen, Überblick und Vergleich

Cited by 40 publications

References 6 publications

Tunnel Squeezing Deformation Control and the Use of Yielding Elements in Shotcrete Linings: A Review

Tunnel Squeezing Deformation Control and the Use of Yielding Elements in Shotcrete Linings: A Review

Verformungsverhalten von Betonen mit ausgeprägtem plastischen Stauchvermögen

Study on the time‐dependent interaction between surrounding rock and yielding supports in deep soft rock tunnels

Contact Info

Product

Resources

About