An experimental study of the effect of local contact loss on the earth pressure distribution on existing tunnel linings

Leung, C.F.; Meguid, Mohamed A.

doi:10.1016/j.tust.2010.08.003

Cited by 68 publications

(18 citation statements)

References 11 publications

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“…The experimental investigation conducted by Leung and Meguid (2011) showed a significant increase in pressure at the springline compared to the changes measured at the invert. Tan and Moore (2007) and Meguid and Dang (2009) also confirmed that the presence of voids at the invert can lead to a reduction in the magnitude of bending moments developing in the pipe wall and reversal in the moment sign.…”

Section: Transverse Section Of the Pipementioning

confidence: 91%

“…The presence of erosion void at the lining invert was found to reduce the bending moments causing reversal in the sign of the moment as the void size increased. Leung and Meguid (2011) conducted an experimental investigation to measure the changes in earth pressure around a tunnel lining due to the introduction of a local contact loss at different locations around the lining. The results showed that earth pressure increased locally around the separated section with a maximum increase of 25% at the springline.…”

Section: Introductionmentioning

confidence: 99%

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A three-dimensional analysis of the effects of erosion voids on rigid pipes

Meguid

Kamel

2014

Tunnelling and Underground Space Technology

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Section: Transverse Section Of the Pipementioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

A three-dimensional analysis of the effects of erosion voids on rigid pipes

Meguid

Kamel

2014

Tunnelling and Underground Space Technology

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“…Li et al have collected a mass of disease specimens for shield tunnels and have established TSI comprehensive tunnel service index for the evaluation of disease condition in shield tunnel by the regression formula of least square method [4]. Leung and Meguid have analyzed the variation of the earth pressure distribution after the occurrence of cavity for different locations around existing tunnels [5]. Lei has analyzed the stress distribution, the changing rule, and the lining failure process in tunnel structure and surrounding rocks for shallow-buried tunnels under the action of unsymmetrical load with different bias angle through model test [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Influence of Regional Concrete Spalling on Shield Tunnel Segments

Wang

Liu

et al. 2019

Advances in Civil Engineering

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Based on the field investigation and analysis, the mechanical characteristics of segment structure in shield tunnels are compared and analyzed under the circumstances of different concrete spalling region by the method of similarity model experiment. Through data analysis of acoustic emission, the results for displacement and internal force of shield tunnel segments are clarified on the segment lining, the influential rule of load bearing capacity is also determined, and the deformation and stress for the different concrete spalling region are described as well. The corresponding research results indicate that range for elastic bearing stage is enlarged while it is narrowed for plastic bearing stage, the convergence and deformation and the accumulated event numbers for acoustic emission on critical instability point are obviously increasing, and the process of damage and failure tends to be sudden for segment lining structure. The ultimate bearing capacity of the damaged segment lining obviously decreases due to regional concrete spalling; to be more specific, the reduction rate for ultimate bearing capacity becomes 6%, 6%, and 13%, respectively, when the range of concrete spalling reaches 45°, 60°, and 75°.

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“…Most studies on the effects of local voids or contact loss between the lining and the soils on a single tunnel have been presented in terms of field investigation [8], theoretical analysis [9], model tests [10], and numerical analysis [11]. Voids can induce the concentrated load to the double-arch tunnel lining and loosening of the soils, with associated shortage of carrying capacity and even damage.…”

Section: Introductionmentioning

confidence: 99%

Effect of Voids Behind Lining on the Failure Behavior of Symmetrical Double-Arch Tunnels

Min

et al. 2019

Symmetry

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The presence of voids behind lining seriously affects the safety of the symmetrical double-arch tunnels during service life. It is essential to find out the impact of voids on tunnel safety due to the increasing demand for the construction and maintenance of symmetrical double-arch tunnels. Model tests and numerical analyses were conducted in this research. The results attained were explored including earth pressure, internal force, and lining failure. Results reveal that the presence of voids has a large influence on the internal force in the lining of symmetrical double-arch tunnels, generally in the form of asymmetrical failure patterns of the lining. The failure patterns of the lining are greatly influenced by the size and location of voids with respect to the symmetrical double-arch tunnel circumference. Significant changes in the lining internal forces were found at the areas in the close vicinity of the void whereas a few changes were found at the bottom of the sidewall, the invert, and the central wall far away from the void. The propagation laws of lining cracks of asymmetrical double-arch tunnels are more complicated than symmetrical tunnels with a void behind the central wall. The location of the initial cracking of symmetrical and asymmetrical double-arch tunnels is the same, while the lining failure of the large-section tunnel is the most complicated.

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An experimental study of the effect of local contact loss on the earth pressure distribution on existing tunnel linings

Cited by 68 publications

References 11 publications

A three-dimensional analysis of the effects of erosion voids on rigid pipes

A three-dimensional analysis of the effects of erosion voids on rigid pipes

Experimental Investigation on the Influence of Regional Concrete Spalling on Shield Tunnel Segments

Effect of Voids Behind Lining on the Failure Behavior of Symmetrical Double-Arch Tunnels

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