A New Unified Solution for Circular Tunnels Based on Generalized SMP Criterion considering the Strain Softening and Dilatancy

Joint Authors

Cai, Mei-Feng
Guo, Qifeng
Xi, Xun
Pan, Jiliang
Wu, Xinghui

Source

Advances in Civil Engineering

Issue

Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-10, 10 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2019-04-02

Country of Publication

Egypt

No. of Pages

10

Main Subjects

Civil Engineering

Abstract EN

According to the strain-softening characteristics of rock mass, an ideal elastic strain-softening model is developed, and the surrounding rock of tunnels is subdivided into the plastic broken zone, plastic strain-softening zone, and elastic zone.

Based on the generalized spatially mobilized plane criterion, an elastic-plastic analytical solution of a circular tunnel is derived.

The effects of intermediate principal stress, strain softening, and dilatancy are considered in the unified solution.

The stress, displacement, and plastic zone radius of surrounding rock based on the SMP criterion are compared with those based on the Mohr–Coulomb criterion.

Furthermore, the effects of parameters such as the softening modulus, dilatancy angle, and internal friction angle on the deformation and stress of tunnels are discussed.

It has been found that the larger the dilatancy angle is, the larger the plastic zone displacement and the radius of the broken zone are.

The larger the internal friction angle, the smaller the sizes of the plastic zone, the strain-softening zone, and the broken zone are.

The deformation of surrounding rock in the broken zone is more sensitive to the internal friction angle than that in the strain-softening zone.

The unified solution based on the SMP criterion provides a well understanding for the elastic-plastic state of tunnels, which can be the guidance for tunnel excavations and support designs.

American Psychological Association (APA)

Guo, Qifeng& Pan, Jiliang& Wu, Xinghui& Xi, Xun& Cai, Mei-Feng. 2019. A New Unified Solution for Circular Tunnels Based on Generalized SMP Criterion considering the Strain Softening and Dilatancy. Advances in Civil Engineering،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1115561

Modern Language Association (MLA)

Guo, Qifeng…[et al.]. A New Unified Solution for Circular Tunnels Based on Generalized SMP Criterion considering the Strain Softening and Dilatancy. Advances in Civil Engineering No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1115561

American Medical Association (AMA)

Guo, Qifeng& Pan, Jiliang& Wu, Xinghui& Xi, Xun& Cai, Mei-Feng. A New Unified Solution for Circular Tunnels Based on Generalized SMP Criterion considering the Strain Softening and Dilatancy. Advances in Civil Engineering. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1115561

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-1115561