Investigation of surface and subsurface displacements due to multiple tunnels excavation in urban area

Talebinejad, Alireza; Chakeri, Hamid; Moosavi, M.; Özçelik, Yılmaz; Ünver, Bahtiyar; Hindistan, Mehmet Ali

doi:10.1007/s12517-013-1056-5

Cited by 11 publications

(1 citation statement)

References 18 publications

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“…As a result, small spacing tunnels have been widely used in highway [2], railway [3] and urban subway [4,5]. Even in the railway double track reform and express highway extension process, due to the presence of the original tunnel, the expansion project needs to construct the new tunnel near the original tunnel, which causes the small clear distance tunnel group appearance [6,7]. For example, in China, Qingshan tunnel and Yangliuwang tunnel of Neijia ng-Kunming railway, Xinpingqu tunnel,Xinpingkou tunnel and Xinliutan tunnel of Hunan-Guizhou double track reform railway, Xujiahe tunnel of Baoji-Chengdu double track reform railway.…”

Section: Introductionmentioning

confidence: 99%

Study on the Blasting Seismic Damage Control Technology for Small Spacing Soft Rock Tunnel

Yang¹,

Wang²,

Wang³

et al. 2017

CEJ

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With a lot construction of transportation infrastructure in Chinese mountainous area, because of its unique advantages such as less land occupation, beautiful appearance and convenient route planning, small spacing tunnels are widely used. The shallow buried tunnel with small spacing, the blasting excavation will lead to tunnel surrounding rock especially in the middle rock wall damage and reduce the self-bearing capacity of surrounding rock. Through detecting and analyzing by the geological radar of the excavated red layer soft rock tunnel surrounding rock found that the middle rock wall loose circle thickness of the tunnel reaches to 1.8 m, the vault and sidewall loose circle thickness is about 1.2 m. Through selection of rational strengthening measures and blasting design scheme to improve drilling parameters and methods, as far as possible to protect the integrity and self-bearing capacity of the surrounding rock, the deformation and vibration of the tunnel would be controlled in reasonable limits and ensure the safety of tunnel construction.

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Section: Introductionmentioning

confidence: 99%