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Volume 38 Issue 4
Aug.  2019
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Article Navigation >  CARSOLOGICA SINICA  > 2019  >  38(4): 573-577
WANG Zefeng, ZHONG Shihang. Application of the landsonar to detecting hidden hazards of tunnel base on high-speed railway in karst areas[J]. CARSOLOGICA SINICA, 2019, 38(4): 573-577. doi: 10.11932/karst20190415
Citation: WANG Zefeng, ZHONG Shihang. Application of the landsonar to detecting hidden hazards of tunnel base on high-speed railway in karst areas[J]. CARSOLOGICA SINICA, 2019, 38(4): 573-577. doi: 10.11932/karst20190415
shu

Application of the landsonar to detecting hidden hazards of tunnel base on high-speed railway in karst areas

doi: 10.11932/karst20190415
  • 1.

    Beijing HEME New-tech Development Co.,Ltd, Beijing 100044，China

  • 2.

    Beijing HEME New-tech Development Co.,Ltd, Beijing 100044，China/China Academy of Railway Sciences，Beijing 100081，China

  • Publish Date: 2019-08-25
    Abstract
  • It is reported that uneven subsidence and floor bulge occurred in the joint test stages of the Malazhai tunnel of the Shanghai-Kunming railway and Gaotian tunnel of the Guiyang-Guangzhou railway, implying potential geologic hazards there. In order to find out the cause of this phenomenon and the quality of grouting, landsonar method was used to detect the karst sections of these tunnels. Results show that there are many medium and small karst caves below the tunnel foundation, which are interconnected by several sets of medium to small faults extending below the tunnel foundation. During rainy seasons, intense change of water pressure surrounding the tunnel caused uneven subsidence and floor bulge. To remove such a hidden hazard, the fractured zone and grouting zone were identified according to landsonar data and a treatment plan was determined, which has been verified by its implementation.

     

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