Influence of seepage and tunnel face opening on face support pressure of EPB shield
Influence of seepage and tunnel face opening on face support pressure of EPB shield
复制标题
渗流及掌子面开度对土压平衡盾构掌子面支护压力的影响
DOI：
10.1016/j.compgeo.2021.104198
复制
发表时间：
2021-07
影响因子：
5.3
通讯作者：
Meng Fanyan
中科院分区：
文献类型：
--
作者：
Yin Xinsheng;Chen Renpeng;Meng Fanyan
The hydraulic head on the tunnel face is smaller than that in the far-field ground when the earth pressure balance shield excavates in a saturated stratum. The seepage force could thus drag the soil to the tunnel face. However, the effect of the seepage on the tunnel face stability is not yet thoroughly understood. A series of centrifuge tests and numerical back-analyses by the Finite Difference Method were performed to investigate the influence of the ground anisotropic permeability and the tunnel face opening on the tunnel face stability under the seepage condition. The results show that the pore-water pressure in front of the tunnel face decreases with the increasing opening area on the tunnel face and the increasingkv/kh(the ratio of vertical hydraulic conductivity to horizontal hydraulic conductivity) as well. A higher support pressure is required for a higherkv/khto keep the tunnel face stable. When the tunnel face is sealed, the minimum support pressure to keep stable is 1.92 times that in the condition with the fully permeable tunnel face. It indicates that seepage induced by the water ingress could benefit the tunnel face stability.
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影响因子：
6.9
作者：
Perazzelli, P.;Leone, T.;Anagnostou, G.
通讯作者：
Anagnostou, G.
影响因子：
5.3
作者：
Maosong Huang;C. Jia
通讯作者：
Maosong Huang;C. Jia
影响因子：
1.9
作者：
O. Mazaeva;V. Khak;E. Kozyreva
通讯作者：
O. Mazaeva;V. Khak;E. Kozyreva
沙中正断层破裂相交隧道的离心机和数值模拟
影响因子：
5.3
作者：
Cai, Q. P.;Peng, J. M.;Chen, X. X.
通讯作者：
Chen, X. X.
DOI：
--
发表时间：
2001-09
期刊：
--
影响因子：
--
作者：
W. Broere
通讯作者：
W. Broere