Deformation Law of Tunnels Using Double-Sidewall Guide Pit Method under Different Excavation Sequences
Source abstract
Abstract
The double-sidewall guide pit method finds extensive application in the construction of large cross-section tunnels in soft rock strata due to its minimal disruption to the surrounding rock, thereby enhancing tunnel stability. To investigate the loading and deformation patterns of the surrounding rock and tunnel support using the double-sidewall guide pit method, this study compares the impacts of various construction sequences on surface settlement, surrounding rock stress, and lining stress using indoor model tests. The experimental results show that after excavating the upper guide hole on one side, the excavation of the lower guide hole on the same side is carried out. The upper and lower support structures form a closed loop, and the structure can better constrain the surrounding rock and control the deformation of the surrounding rock, whereas the lower structure can share the stresses suffered by the upper structure. Therefore, compared with the upper and lower excavation methods, the surface settlement caused by the left and right excavation methods is smaller, the disturbance to the surrounding rock is smaller, and the supporting structure is more evenly and stably stressed in the excavation process.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Geotechnical Engineering and Analysis · Landslides and related hazards · Grouting, Rheology, and Soil Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Guangzhou Metro Design & Research Institute Co., Ltd., No. 204, Huan Shi Xi Road, Yuexiu District, Guangzhou 510010, China
China Railway Tenth Bureau Group Urban Rail Transit Engineering Co., Ltd., No. 555, North Panyu Avenue, Donghuan Street, Panyu District, Guangzhou 511400, China
School of Civil and Transportation Engineering, Guangdong University of Technology, No. 100, Outer Ring West Road, Guangzhou University Town, Panyu District, Guangzhou 510006, China
Funding
National Natural Science Foundation of China · Guangdong Basic and Applied Research Foundation · Research and Development Project of The Ministry of Housing and Urban Rural Development
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