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Chinese karst geology and measures to prevent geohazards during shield tunnelling in karst region with caves

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  • Qing-Long Cui
  • Huai-Na Wu
  • Shui-Long Shen
  • Ye-Shuang Xu
  • Guan-Lin Ye

Abstract

Karst landscapes are widely distributed in China, and buried karst is widespread in Guangdong. This study mainly focuses on buried karst or karst caves which are underground at depths of up to 50 m and can significantly affect engineering construction activity. The karst caves, which are widely distributed in Guangdong Province, have the following features: high fissure water content, high rock permeability, prone to collapse, variable shapes, and irregular distribution. When a shield tunnel is constructed in this kind of environment, hazards, such as sink holes, the ingress of water or stones, and damage to the constructed tunnels may occur. Thus, karst caves need to be treated before tunnel construction. This paper presents a procedure for karst cave treatment to mitigate possible hazards during shield tunnelling in karst regions. The construction procedure includes field investigation, judgment, treatment, and effectiveness check. The treatment criteria, grouting material, construction steps, and effectiveness check for the karst cave treatment are introduced in detail. A field test on shield tunnelling excavation was conducted using the karst cave treatment in the karst region of Guangzhou, China. Field investigations include testing the unconfined compressive strength (UCS) of borehole samples of grouting materials, standard penetration test (SPT), core recovery (CR), ground surface settlement and building settlement. All of the UCS values of the borehole samples are greater than 0.2 MPa, the modified SPT values are more than ten, and the CR values are greater than 90 %. The measured values of ground surface settlement and building settlement are all within the allowable ranges. All of the test results demonstrate the applicability of this treatment process in karst regions. Copyright Springer Science+Business Media Dordrecht 2015

Suggested Citation

  • Qing-Long Cui & Huai-Na Wu & Shui-Long Shen & Ye-Shuang Xu & Guan-Lin Ye, 2015. "Chinese karst geology and measures to prevent geohazards during shield tunnelling in karst region with caves," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 77(1), pages 129-152, May.
    • Handle: RePEc:spr:nathaz:v:77:y:2015:i:1:p:129-152
    DOI: 10.1007/s11069-014-1585-6
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    References listed on IDEAS

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    1. Huai-Na Wu & Run-Qiu Huang & Wen-Juan Sun & Shui-Long Shen & Ye-Shuang Xu & Yan-Bin Liu & Shou-Ji Du, 2014. "Leaking behavior of shield tunnels under the Huangpu River of Shanghai with induced hazards," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 70(2), pages 1115-1132, January.
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    Cited by:

    1. Xiuling Wang & Jinxing Lai & Siyue He & Rodney Sheldon Garnes & Yuwei Zhang, 2020. "Karst geology and mitigation measures for hazards during metro system construction in Wuhan, China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 103(3), pages 2905-2927, September.
    2. Gang Zheng & Xiao-shuang Zhang & Yu Diao & Hua-yang Lei, 2016. "Experimental study on grouting in underconsolidated soil to control excessive settlement," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 83(3), pages 1683-1701, September.
    3. Lin, Song-Shun & Shen, Shui-Long & Zhou, Annan & Xu, Ye-Shuang, 2021. "Novel model for risk identification during karst excavation," Reliability Engineering and System Safety, Elsevier, vol. 209(C).
    4. Xin Huang & Shucai Li & Zhenhao Xu & Ming Guo & Yucheng Chen, 2018. "Assessment of a Concealed Karst Cave’s Influence on Karst Tunnel Stability: A Case Study of the Huaguoshan Tunnel, China," Sustainability, MDPI, vol. 10(7), pages 1-26, June.
    5. Shangqu Sun & Liping Li & Jing Wang & Shaoshuai Shi & Shuguang Song & Zhongdong Fang & Xingzhi Ba & Hao Jin, 2018. "Karst Development Mechanism and Characteristics Based on Comprehensive Exploration along Jinan Metro, China," Sustainability, MDPI, vol. 10(10), pages 1-21, September.

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