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Mechanical Analysis of a Super-Large-Diameter Shield Tailskin Under Deep Ground Load

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The deformation and stress of a super-large-diameter shield tailskin are analyzed in this paper. Four kinds of structure analysis models, i.e. the perfect solid shell model, the defected solid shell model, the perfect hollow-layered shell model, and the defected hollow-layered shell model are formed to study the effects of initial geometrical defects and the hollow-layered shell formation on the deformation properties of the tailskin. Using the FEM modelling, the defected hollow-layered shell model gets a maximum deformation of 18.8 mm and a maximum Mises-stress of 304 MPa under the ultimate load condition, which indicates plastic deformation; while the perfect solid shell model shows a corresponding result of 3.6 mm and 71.6 MPa. The study shows initial geometrical defects and hollow-layered shell formation lead to much larger deformation and higher stress value, compared with the perfect solid shell model. It is necessary to consider these two factors when designing super-large-diameter shields for deep-buried tunnels.

LOKASI: Ruang Koleksi Umum
Rak: 2

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Ketersediaan

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Informasi Detail

Judul Seri

Proceedings of GeoShanghai 2018 International Conference: Tunnelling and Underground Construction

No. Panggil

624.19 (063) ZHO m

Penerbit

Shanghai : Springer., 2018

Deskripsi Fisik

442-450p.: Illus.; 18 x 24 cm

Bahasa

English

ISBN/ISSN

978-981-13-0016-5

Klasifikasi

624.19 (063)

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

TUNNELLING

Info Detail Spesifik

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Pernyataan Tanggungjawab

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Versi lain/terkait

Lampiran Berkas

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