Stability analysis and optimization of primary support on tunnel excavation with soft-hard interbed rock

被引：0

作者：

Ren S. ^{[1
]}

Ouyang X. ^{[1
]}

Jiang D. ^{[1
]}

Chen F. ^{[2
,3
]}

机构：

[1] State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing

[2] Chongqing Jiang Xi Highway Overall Contracting Units, Power China Road Bridge Group Co. Ltd., Chongqing

[3] School of Civil and Environmental Engineering, Beijing University of Science and Technology, Beijing

来源：

| 1600年 / Huazhong University of Science and Technology卷 / 45期

关键词：

Anchor bolt support optimization; Bedding effect; Contact analysis; Soft-hard interbed rock; Stability analysis; Tunnel;

D O I：

10.13245/j.hust.170704

中图分类号：

学科分类号：

摘要：

The contact analysis method of ANSYS was used to simulate the bedding effect and applied to the construction of Simianshan mountain tunnel in Chongqing surrounded with hard and soft interbed rock at the level of grade V, and the stability of the tunnel and optimize the initial support was analyzed. It can be concluded that the vault sink value of the tunnel is 1.5 to 2.0 times larger than the level convergence value after excavation, besides, the stress of the pandrel anchors is larger than the vault anchors, the anchors in haunch and arch foot are not affected by forces. Through the deformation and support characteristics of the tunnel surrounded with hard and soft interbed rock to optimize the anchor support, it can be find out that the sand-mud interbed tunnel section can cancel the anchors whose angle are below 35° with the rock. Compared with the field tests in the original plan and optimization construction sections, results show that the simulation and optimization values approximately agree with the measured values. Research results provide a good model for the similar tunnel projection. © 2017, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.

引用

页码：17 / 22

页数：5

共 4 条

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[3] Azami A., Pietruszczak S., Guo P., Bearing capacity of shallow foundations in transversely isotropic granular media, International Journal for Numerical and Analytical Methods in Geomechanics, 34, 8, pp. 771-793, (2010)
[4] Hammaty Y., Deroeck G., Vandewalle L., Finite element modeling of reinforced concrete taking into consideration Bond-slip, 1991 ANSYS Conference Proceedings, pp. 1-10, (1991)

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