Geological defect and its geophysical prediction method in Karst Tunel

• Autorzy: Li L. , Li S. , Zhou Z. , Xu Z. , Shi S. , Zhang Q. , Zhou Y. , Hu C.

Warianty tytułu

PL

Defekt geologiczny i jego geofizyczna prognoza w tunelach krasowych

• Języki publikacji: EN

Abstrakty

EN

With the rapid development of traffic tunnels construction in mountain area in the world, hydrogeological conditions are becoming unprecedentedly complex, water inrush and mud gushing is one of the typical common geologic hazards for the karst tunnel construction. .Based on the analyzing karst tunnel water inrush examples in recent years in china, the mechanism of geologic structure for water inrush has been explained through analyzing different karst hydrogeological storage structures. The unfavorable geologic bodies can be forecasted by geophysical method, and the detecting device and the signal receiving sensor would be selected for different water-bearing structure. The seismic wave, electromagnetic wave will be reflected and received by sensor when encountered geological defect, and the attributes of unfavorable geologic bodies were identified based on the returned signal. Risk assessment of water inrush must be done firstly during tunnel construction, an optimal system for water-bearing structure detecting in which prediction methods vary with the risk level of water inrush can be probed. As a result, the hazard prevention & controlling technological system of water inrush of karst tunnel is composed of risk evaluation system and comprehensive geological prediction system. It has been successfully used for hazards prevention and control for water inrush of Qiyueshan Tunnel in Hurong highway, including risk assessment and hazard source detection. Conclusions will benefit further research on hazards control of underground construction.

PL

Wraz z szybkim rozwojem budowy tuneli w terenach górskich rośnie znaczenie oceny warunków hydrogeologicznych: W szczególności, w przypadku tuneli w terenach krasowych, typowym niebezpieczeństwem jest napór wody i tryskające błoto. Na podstawie analizy wypadków w tunelach krasowych w Chinach w ostatnich latach, wyjaśniono mechanizm naporu wody przez analizę różnych formacji hydrogeologicznych w obszarach krasowych. Niekorzystne warunki geologiczne można prognozować metodami geofizycznymi, przez zastosowanie urządzenia detekcji sygnałów odbitych od różnych struktur wodonośnych. Podczas projektowania tunelu należy ocenić ryzyko wystąpienia naporu wody i przeprowadzić wszechstronną prognozę geologiczną. Przy budowie tunelu Qiyushan linii kolejowej Hurong przeprowadzono badania obejmujące oszacowanie ryzyka i wskazano źródła niebezpieczeństw.

Słowa kluczowe

EN

geological defect; detection device; sensors

PL

defekt geologiczny; układ detekcji; czujniki; tunel krasowy

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2013
• Tom: R. 89, nr 1b
• Strony: 116--119
• Opis fizyczny: Bibliogr. 7 poz., rys., tab.

Twórcy

autor

Li L.

• Geotechnical and Structural Engineering Research Centre, Shandong University
• State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute
• State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining & Technology

autor

Li S.

• Geotechnical and Structural Engineering Research Centre, Shandong University

autor

Zhou Z.

• Geotechnical and Structural Engineering Research Centre, Shandong University

autor

Xu Z.

• Geotechnical and Structural Engineering Research Centre, Shandong University

autor

Shi S.

• Geotechnical and Structural Engineering Research Centre, Shandong University

autor

Zhang Q.

• Geotechnical and Structural Engineering Research Centre, Shandong University

autor

Zhou Y.

• Geotechnical and Structural Engineering Research Centre, Shandong University

autor

Hu C.

• Geotechnical and Structural Engineering Research Centre, Shandong University

Bibliografia

• [1] QH Qian, XL Rong. State, issues and relevant recommendations for security risk management of china’s under ground engineering, Chinese Journal of Rock Mechanics and Engineering, 27(4)( 2008): 649-655.
• [2] ZW Liu, MC He, SR Wang. Study of karst waterburst mechanism and prevention countermeasures in Yuanliangshan tunnel, Rock and Soil Mechanics, 27(2)(2006): 228-232.
• [3] SC Li, YG Xue, QS Zhang, et al. Key technology study on comprehensive prediction and early-warning of geological hazards during tunnel construction in high-risk karst areas. Chinese Journal of Rock Mechanics and Engineering, 27(7) (2008): 1297-1307.
• [4] CN Lin, LP Li, XR Han. Research on forecast method of tunnel water inrush in complex karst areas, Chinese Journal of Rock Mechanics and Engineering, 27(7)(2008): 1469-1476.
• [5] LP Li, SC Li, J Chen, et al. Construction license mechanism and its application based on karst water inrush risk evaluation. Chinese Journal of Rock Mechanics and Engineering, 20(7)(2011): 1345-1355.
• [6] LP Li, SC Li, ZH Xu, et al. Mechanism and key congrolling technology of water inrush in tunnel construction. 12th ISRM international congress on rock mechanic. (2011): 650-651.
• [7] QS Zhang, ZH Xu, SC Li. Integrated advanced geological prediction methods and engineering application of karst tunnels. Journal of Shandong University(Engineering Science), 39(4)(2009): 7-11