EFFECT OF BLASTING ON THE STABILITY OF LINING DURING EXCAVATION OF NEW TUNNEL NEAR THE EXISTING TUNNEL

Authors

  • Tuan Minh Tran Hanoi University of Mining and Geology, Underground and mining construction department, Ha Noi city, Vietnam
  • Quang Huy Nguyen Institute of transport science and technology, Bridge and Tunnel design department, Ha Noi city, Vietnam

DOI:

https://doi.org/10.14311/CEJ.2021.01.0004

Abstract

In recent years, experimental and numerical researches on the effect of blasting pressure on the stability of existing tunnels was widely obtained. However, the effect of the blasting pressure during excavation a new tunnel or expansion old tunnels on an existing tunnel has disadvantages and still unclear. Some researches were carried out to study the relationship of the observed Peak Particle Velocity (PPV) on the lining areas along the existing tunnel direction, due to either the lack of in situ test data or the difficulty in conducting field tests, particularly for tunnels that are usually old and vulnerable after several decades of service. This paper introduces using numerical methods with the field data investigations on the effect of the blasting in a new tunnel on the surrounding rock mass and on the existing tunnel. The research results show that not only predicting the tunnel lining damage zone under the impact of blast loads but also determination peak maximum of explosion at the same time at the surface of tunnel working.

References

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Published

2021-04-09

How to Cite

Tran , T. M., & Nguyen, Q. H. (2021). EFFECT OF BLASTING ON THE STABILITY OF LINING DURING EXCAVATION OF NEW TUNNEL NEAR THE EXISTING TUNNEL. Stavební Obzor - Civil Engineering Journal, 30(1). https://doi.org/10.14311/CEJ.2021.01.0004

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Articles