Experimental study on dynamic response of underground utility tunnel under ground explosion

QIAN Haimin; PAN Yahao; ZONG Zhouhong; GAN Lu; WU Xi; SUN Miaomiao

doi:10.11883/bzycj-2023-0400

Volume 44 Issue 7

Jul. 2024

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Xu Shuai, Peng Jian-yu, Li Yuan-hui, An Long, Wu Jin. Blasting parameter optimization of medium-depth hole caving for steeply inclined thin veins[J]. Explosion And Shock Waves, 2015, 35(5): 682-688. doi: 10.11883/1001-1455(2015)05-0682-07

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QIAN Haimin, PAN Yahao, ZONG Zhouhong, GAN Lu, WU Xi, SUN Miaomiao. Experimental study on dynamic response of underground utility tunnel under ground explosion[J]. Explosion And Shock Waves, 2024, 44(7): 075102. doi: 10.11883/bzycj-2023-0400

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Experimental study on dynamic response of underground utility tunnel under ground explosion

doi: 10.11883/bzycj-2023-0400

QIAN Haimin^{1, 2, 3
,},
PAN Yahao⁴,
ZONG Zhouhong^{4
,
,},
GAN Lu⁴,
WU Xi^{1, 2, 3},
SUN Miaomiao^{1, 2, 3}

1.
Department of Engineering, Hangzhou City University, Hangzhou 310015, Zhejiang, China
2.
Key Laboratory of Safe Construction and Intelligent Maintenance for Urban Shield Tunnels of Zhejiang Province, Hangzhou 310015, Zhejiang, China
3.
Zhejiang Engineering Research Center of Intelligent Urban Infrastructure, Hangzhou 310015, Zhejiang, China
4.
Engineering Research Center of Safety and Protection of Explosion and Impact of Ministry of Education, Southeast University, Nanjing 211189, Jiangsu, China

Received Date: 2023-11-02
Rev Recd Date: 2024-03-20

Available Online: 2024-03-21

Publish Date: 2024-07-15

Abstract

Abstract

To investigate the anti-external-blast performance of underground utility tunnel structures, field explosion tests were conducted to study the dynamic response characteristics and failure modes of cast-in-place and precast segmental utility tunnel structures subjected to the ground surface explosion. Via field explosion tests of 11 cases, the failure characteristics and dynamic responses of cast-in-place and precast segmental utility tunnels under explosion at different scaled distances were observed. The anti-blast performance of the cast-in-place and precast segmental utility tunnels was compared and analyzed. The research results indicate that both the roofs of cast-in-place and precast segmental utility tunnels ultimately exhibit bending and shear failure when subjected to ground explosion. The anti-blast performance of the cast-in-place utility tunnel is better than that of the precast segmental utility tunnel. The detonation position has a significant impact on the blast response of the precast segmental utility tunnel, and it is unfavorable when the detonation position is above the center of the segment. Under a small-scale ground surface explosion, the damaged area of the cast-in-place utility tunnel is larger than that of the precast segmental utility tunnel. The damage of the precast segmental utility tunnel is concentrated in the section or connection joint located near the explosion center, and there is a significant residual slip between segments.
- underground utility tunnel,
- precast segmental assembling,
- ground explosion experiment,
- dynamic response,
- failure mode

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References(27)

References

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