Tehnički vjesnik, Vol. 32 No. 4, 2025.
Prethodno priopćenje
https://doi.org/10.17559/TV-20240630001812
The Selection of a Suitable Shape for Parallel Tunnels in Case of Changing Surface Conditions
Nguyen Duyen Phong
orcid.org/0000-0003-3164-4688
; Hanoi University of Mining and Geology, Faculty of Civil Engineering, No. 18 Vien Street, Duc Thang Ward, Bac Tu Liem District, 100000, Hanoi, Vietnam
*
Tran Tuan Minh
; Hanoi University of Mining and Geology, Faculty of Civil Engineering, No. 18 Vien Street, Duc Thang Ward, Bac Tu Liem District, 100000, Hanoi, Vietnam
Dang Trung Thanh
; Hanoi University of Mining and Geology, Faculty of Civil Engineering, No. 18 Vien Street, Duc Thang Ward, Bac Tu Liem District, 100000, Hanoi, Vietnam
* Dopisni autor.
Sažetak
The process of constructing traffic tunnels through mountains, as well as metro tunnels, often involves using two parallel tunnels to enhance the operating capacity and improve convenience during operation of the tunnels. Currently, analyses of two-tunnel systems frequently assume circular tunnels embedded in an elastic, isotropic, and homogeneous soil mass, with a flat surface. However, in practice tunnels often feature cross-sections of various shapes depending on the intended use and the tunnelling technology employed. The geological conditions are typically complex and do not conform to the assumptions of elasticity or isotropic homogeneity. Tunnel cross-sections can be an arch, horseshoe arch, curved rectangle, ellipse, oval, and other shapes. Additionally, topographical surface conditions often vary and are not flat, as assumed in simplified theoretical problems. Relation to this problem requires in-depth research to ensure effective excavation, protection, and effective use of tunnels. This study investigated the mechanisms of rock mass alteration around tunnels with different cross-sections, considering changes in surface conditions, to determine the most suitable tunnel shapes for various scenarios. The results of the research showed that under both of the flat and changing surface conditions the suitable tunnel shapes are horse-shoe or sub-rectangular. In these cases, the displacement on the boundary of tunnels will be minimized.
Ključne riječi
slopes; non-circular tunnels; numerical simulation; parallel tunnels; rock bolts; shotcrete
Hrčak ID:
332985
URI
Datum izdavanja:
29.6.2025.
Posjeta: 285 *