Mechanical Response Law and Parameter Influence Analysis of Karst Tunnel Dynamic Excavation

被引：4

作者：

Han, Gang ^{[1
,2
]}

Xue, Penghui ^{[3
]}

Wang, Yanyan ^{[1
]}

Li, Xian ^{[3
]}

Bian, Hanbing ^{[4
]}

Wang, Yixian ^{[3
]}

Guo, Panpan ^{[3
]}

机构：

[1] Jinan Rail Transit Grp Co Ltd, Jinan 250101, Peoples R China

[2] China Univ Min & Technol, Sch Mech & Civil Engn, Xuzhou 221116, Peoples R China

[3] Hefei Univ Technol, Coll Civil Engn, Hefei 230009, Peoples R China

[4] Univ Lille, Lab Genie Civil & Geoenvironm, IMT Lille Douai, JUNIA Hauts France,ULR LGCgE 4515, F-59000 Lille, France

来源：

APPLIED SCIENCES-BASEL | 2023年 / 13卷 / 16期

基金：

中国国家自然科学基金;

关键词：

karst caves; tunnel; displacement; stress; parameter sensitivity; GROUND COLLAPSE;

D O I：

10.3390/app13169351

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

To ensure the stability of the tunnel structure, this paper simulates the excavation process of shield tunneling in karst areas, and monitors the top of the arch, the bottom of the arch and the waist of the arch within the influence of the cave. It obtains the displacement and stress change laws under the influence of the upper cave and the lower cave. Finally, the main factors causing karst collapse in tunnels are explored through orthogonal tests. The results indicate that the displacement of the surrounding rock within the influence of the cave decreases and the stress increases. When the cavity and the tunnel reach the safety limit distance, the effect of the lower cavity on the stress around the tunnel is more obvious than that of the upper cavity. The results of the orthogonal test show that when the cavity is above the tunnel, the tunnel burial depth has the greatest influence on the stability of the surrounding rock; when the cavity is below the tunnel, the cavity height has the greatest influence on the stability of the surrounding rock.

引用

页数：21

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