Study on Deformation and Failure Behavior of Mountain Tunnel Linings Which Consist of Various Materials

Yashiro, Keiji; Hirata, Ryo; Okano, Noriyuki; Kojima, Yoshiyuki

doi:10.2208/jscejte.71.78

Cited by 8 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(1) Prediction methods for mountain tunnel deformation [4,5] In mountain tunnels, deformation such as displacement and/or upheaval sometimes occurs due to the action of ground pressure, which may occur over a long period of time. For that reason, geological surveys and long-term monitoring of convergences are conducted.…”

Section: Tunnel Deformation Prediction Methodsmentioning

confidence: 99%

“…In addition, experiments were conducted on model linings made of plain concrete, fiber reinforced concrete, reinforced concrete and brick to identify the unique deformation characteristics of each of these materials. Furthermore, using the analytical method mentioned above, a convergence reduction ratio was proposed as an indicator of compressive cracks [5].…”

Section: Tunnel Deformation Prediction Methodsmentioning

confidence: 99%

See 1 more Smart Citation

<b>Recent Research and Development on Railway Geotechnical Structural Technology</b>

Kojima¹

2017

QR of RTRI

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Tunnel Deformation Prediction Methodsmentioning

confidence: 99%

Section: Tunnel Deformation Prediction Methodsmentioning

confidence: 99%

<b>Recent Research and Development on Railway Geotechnical Structural Technology</b>

Kojima¹

2017

QR of RTRI

Self Cite

View full text Add to dashboard Cite

show abstract

“…e vertically concentrated loading configuration was used in the test to simulate the case in which the lining was subjected to loosening vertical soil pressure, which is similar to the loading method described in the literature [1,34]. If the influence of self-weight on the structure is ignored and the external load is concentrated, then prototype materials can be used for the model tests; notably, this technique is commonly used in modelling concrete structures [35].…”

Section: Model Test Contentsmentioning

confidence: 99%

Mechanical Behavior and Its Influencing Factors on Engineered Cementitious Composite Linings

Ding

et al. 2019

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

A 1/5-scale model test was used to analyze and compare the mechanical responses of engineered cementitious composite (ECC) lining and traditional concrete lining under vertically concentrated loading. Test results indicate that the major failure mode of the lining cross section is controlled by tensile stress. ECC linings express better cracking control capability and deformation performance than the traditional concrete tunnel linings. On this basis, the effects of loading direction, material tensile properties, soil stiffness, and model size on the mechanical behavior of ECC and R/ECC linings were analyzed by numerical calculation. Parametric analysis shows that the failure modes of ECC and R/ECC linings along different load directions are caused by the loss of bearing capacity due to the formation of three plastic hinges. Lining damage under horizontal loading is more concentrated than those under vertical and oblique loading. Improving the tensile properties of ECC materials can help enhance the load capacity and deformability of linings. Soil stiffness obviously affects the postpeak deformation behavior of ECC linings, as shown by the sharp increase of the load-displacement curve with the increase of soil stiffness. The peak load and corresponding displacement of linings demonstrate nonlinear increase with the increase in model size.

show abstract

“…e lining specimens are 2.3 m wide, 1.56 m high, 80 mm thick, and 300 mm long. Based on the existing achievements [20,21], eight 10 cm thick elastic rubber plates are used to simulate the formation constraints around the lining. e size of a single rubber cushion plate is 0.3 m × 0.3 m. e side of the rubber plate in contact with the lining is processed into an arc so that it can be closely adhered to the lining.…”

Section: Test Materials and Specimensmentioning

confidence: 99%

“…e external loads causing lining failure can be categorized into vertical relaxation ground pressure, biased ground pressure, and horizontal plastic ground pressure [20,22]. For simplicity, this test only considers vertical and oblique load directions to simulate lining under vertical relaxation ground pressure and biased pressure.…”

Section: Test Conditionmentioning

confidence: 99%

Influence of Existing Defects on Mechanical Properties of NC Lining

Zhang

Ren

Ding

et al. 2019

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

The mechanical properties of the lining are directly affected by defects such as voids behind the lining and insufficient thickness of the lining. In order to quantitatively evaluate this effect, the mechanical behavior of the lining under the influence of the void behind the lining, the insufficient thickness of the lining, and the combination of the two kinds of defects are adopted by the 1/5 scale model test. Based on the experimental research, numerical calculation models based on the CDP model for defect lining are established, with the effects of load direction, stratum stiffness, defect location, defect type, and degree on the mechanical behavior of the lining analyzed by the numerical simulation. The experimental and numerical results show that the void weakens the stiffness of the lining. As the void range increases, the lining becomes more deformable and its bearing capacity decreases with the “S” curve. Thinning significantly reduces the deformation properties of the lining and the bearing capacity and stiffness of the thinned section. The lining bearing capacity decreases linearly with the increase of the thinning ratio, when the load is applied at the thinning. With the influence of combined defects on the load-displacement curve of the lining fluctuating drastically, the mechanical properties of the lining are significantly reduced. The bearing capacity of lining decreases with the increase of composite defects in a “S” shape. The effect of void and lining thinning on the lining bearing capacity increases with the increase of the stiffness of the formation. The loss rate equation of the concrete lining bearing capacity under the influence of existing defects is established by using the L-M nonlinear regression analysis, a provision of scientific guidance for the safety evaluation of the defect lining.

show abstract

Study on Deformation and Failure Behavior of Mountain Tunnel Linings Which Consist of Various Materials

Cited by 8 publications

References 0 publications

<b>Recent Research and Development on Railway Geotechnical Structural Technology</b>

<b>Recent Research and Development on Railway Geotechnical Structural Technology</b>

Mechanical Behavior and Its Influencing Factors on Engineered Cementitious Composite Linings

Influence of Existing Defects on Mechanical Properties of NC Lining

Contact Info

Product

Resources

About