Analytical modeling of complex contact behavior between rock mass and lining structure

Abstract The results based on 2-year long measurements 01 Jan. 2016–2031 Dec. 2017 have been used for discussing the influence of tunnel lining on the size of 222Rn activity concentration and the impact of the employed rock mass insulation on natural convective air exchange. In April, air movement started when the temperature was at least 7 °C lower than the mean inside. Between May and October, an increase to 9 °C above the underground temperature resulted in an increase of radon concentration. An unconstrained convection process did not start until November and it continued until the end of March. The reinforced concrete lining insulated the fractured and absorptive rock mass. The roof and the sidewall lining had little impact on air movement process.

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Application Study of Polypropylene Fiber Reinforced Concrete Railway Tunnel Lining Structure within Hard Rock Mass Using Wet-Sprayed Technique

Materials Science Forum ◽

10.4028/www.scientific.net/msf.610-613.76 ◽

2009 ◽

Vol 610-613 ◽

pp. 76-80

Author(s):

Tai Quan Zhou ◽

Yuan Hua

Keyword(s):

Rock Mass ◽

Reinforced Concrete ◽

Polypropylene Fiber ◽

Tunnel Lining ◽

Fiber Reinforced Concrete ◽

Railway Tunnel ◽

Sprayed Concrete ◽

Rock Mass Stability ◽

Lining Structure ◽

Polypropylene Fiber Reinforced Concrete

The wet sprayed concrete technique has good virtue of improving the working condition within the tunnel, fewer reflective concrete loss and higher sprayed concrete quality. The concrete mixed with polypropylene fiber could improve the concrete inner structure, the flexural strength, tensile strength and anti-penetrating ability. The application of the wet sprayed polypropylene fiber reinforced concrete in the construction of tunnel lining structure could improve the stability of tunnel rock mass. The nonlinear finite element analysis is performed on rock mass stability of the railway tunnel lining structure and the rock mass stability is analyzed both for the un-lining tunnel and the lining tunnel. The computation result shows that the rock mass plasticity zone distribution with the lining structure is fewer than that without lining structure. To measure the deformation behavior, tunnel deformation measurement sensors are installed in the railway tunnel transverse section. The measured railway tunnel deformation result also shows that the lining structure deforms little and the rockmass is in stable state.

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Three-Dimensional Numerical Analysis of Compound Lining in Complex Underground Surge-Shaft Structure

Mathematical Problems in Engineering ◽

10.1155/2015/387379 ◽

2015 ◽

Vol 2015 ◽

pp. 1-10 ◽

Cited By ~ 2

Author(s):

Juntao Chen ◽

Yang Yang ◽

Chao Ye ◽

Ying Yang ◽

Ming Xiao

Keyword(s):

Rock Mass ◽

Constitutive Relations ◽

Three Dimensional ◽

Concrete Lining ◽

Interface Element ◽

Nonlinear Fem ◽

Lining Structure ◽

Shaft Lining ◽

Nonlinear Interface ◽

Computing Method

The mechanical behavior of lining structure of deep-embedded cylinder surge shaft with multifork tunnel is analyzed using three-dimensional nonlinear FEM. With the elastic-plastic constitutive relations of rock mass imported and the implicit bolt element and distributed concrete cracking model adopted, a computing method of complex surge shaft is presented for the simulation of underground excavations and concrete lining cracks. In order to reflect the interaction and initial gap between rock mass and concrete lining, a three-dimensional nonlinear interface element is adopted, which can take into account both the normal and tangential characteristics. By an actual engineering computation, the distortion characteristics and stress distribution rules of the dimensional multifork surge-shaft lining structure under different behavior are revealed. The results verify the rationality and feasibility of this computation model and method and provide a new idea and reference for the complex surge-shaft design and construction.

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Effects of the lining structure on mechanical and fracturing behaviors of four-arc shaped tunnels in a jointed rock mass under uniaxial compression

Theoretical and Applied Fracture Mechanics ◽

10.1016/j.tafmec.2020.102887 ◽

2021 ◽

pp. 102887

Author(s):

Xiang Fan ◽

Zhijun Yang ◽

Kaihui Li

Keyword(s):

Rock Mass ◽

Uniaxial Compression ◽

Jointed Rock ◽

Jointed Rock Mass ◽

Lining Structure

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Early Stage Tunnel Lining Experimental Study of Jinhuashan Railway Tunnel Construction within Soft and Weak Rock Mass

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.204-208.1532 ◽

2012 ◽

Vol 204-208 ◽

pp. 1532-1537

Author(s):

Li Qiao Jin ◽

Tai Quan Zhou ◽

Bao Hua Lv

Keyword(s):

Rock Mass ◽

Reinforced Concrete ◽

Early Stage ◽

Tunnel Lining ◽

Fiber Reinforced Concrete ◽

Concrete Lining ◽

Fiber Reinforced ◽

Railway Tunnel ◽

Tunnel Section ◽

Lining Structure

Polypropylene fiber reinforced concrete can improve the common concrete flexibility and it is beneficial for interaction between concrete lining structure and rock mass. The use of fiber reinforced concrete with wet sprayed concrete technique can improve the concrete lining structure construction quality and improve the rock mass self-bearing capacity. The wet-sprayed fiber reinforced concrete is first introduced in Jinhuashan railway tunnel early stage lining structure within soft and weak rock mass. The design of Jinhuashan railway tunnel lining structure using fiber reinforced concrete is introduced and the requirement of material used is explained. To evaluate the lining effect using wet-sprayed fiber reinforced concrete, the online monitoring method is used to measure the rock mass pressure and the concrete lining layer stress for both the experimental tunnel sections and comparison tunnel section. The monitoring data result shows that the rock mass pressure in experimental section is even distribution with lower rock mass pressure and lower concrete lining layer stress. The value of rock mass pressure and tunnel lining layer stress in comparison tunnel section is a little higher than that in experimental tunnel section. The experimental tunnel section using fiber reinforced concrete has good lining effect.

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Analytical modeling of a deep tunnel inside a poro-viscoplastic rock mass accounting for different stages of its life cycle

Computers and Geotechnics ◽

10.1016/j.compgeo.2013.11.004 ◽

2014 ◽

Vol 58 ◽

pp. 88-100 ◽

Cited By ~ 12

Author(s):

T.A. Bui ◽

H. Wong ◽

F. Deleruyelle ◽

N. Dufour ◽

C. Leo ◽

...

Keyword(s):

Life Cycle ◽

Rock Mass ◽

Analytical Modeling ◽

Deep Tunnel

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Final Lining Behaviour in Extremely Low Temperatures / Chování Definitivního Ostění Při Extrémně Nízkých Teplotách

Transactions of the VŠB - Technical University of Ostrava Civil Engineering Series ◽

10.2478/v10160-012-0015-5 ◽

2012 ◽

Vol 12 (2) ◽

pp. 32-40 ◽

Cited By ~ 1

Author(s):

Lukáš Ďuriš ◽

Josef Aldorf ◽

Karel Vojtasík

Keyword(s):

Rock Mass ◽

Climatic Conditions ◽

Tunnel Lining ◽

Fe Model ◽

Complex Task ◽

Construction Technology ◽

Temperature Changes ◽

Temperature State ◽

Lining Structure ◽

Temperature Records

Abstract Design of a tunnel lining is complex task. The tunnel lining structure works in close interaction with the surrounding rock mass. The value of the load depends on geotechnical circumstances, primary lining, shape and size of opening, construction technology and as well on the temperature distribution in a lining that is determined by climatic conditions. The article deals with the temperatures in the tunnel lining that are brought about by air temperature changes in tunnel space and a constant temperature inside the rock mass. This problem is solved making use of temperature records in tunnel, on the inner and outer surface of the tunnel lining and in rock mass measured at a motorway Tunnel Klimkovice. These records are analyzed and submit to FE model of the tunnel lining so that the lining temperature state is converted for a lining stress state.

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