In order to study the problem of strata subsidence caused by sand leakage in tunnel lining cracks in sandy soil, a set of sand (water) leakage visualization test system for underground engineering which could change the size of circular leakage opening was designed. The sand flow pattern under different working conditions was obtained. It was shown that the sand inrush process could be divided into four stages: initial stage, induced stage, diffusion stage and stable stage. The influence of the diameter of the leakage opening and the thickness of soil layer on the sand inrush and the sandy soil subsidence was studied. When the diameter of the sand leakage opening was same, the influence range of the subsidence increased with the increase of the thickness of soil layer. When the thickness-to-span ratio reached 21.4, the sand layer only subsided. No sand inrush occurred. When the thickness-to-span ratio continued to increase to 25.7, the sand layer did not subside. When the thickness of the sand layer was same, the diameter of the columnar region in the vertical subsidence zone increased with the increase of the diameter of the sand leakage opening. The subsidence range induced by the circular sand leakage opening was rounded on the top plane, and the quadratic surface was approximated on the section. The subsidence range of the soil was related to the shape failure angle of the collapsed surface. The shape failure angle of the collapsed surface was about 13° larger than the natural angle of repose of the soil. This provided a reference for the prevention and control of stratigraphic subsidence caused by the sand leakage of tunnel lining cracks in sandy soil layers.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Experimental Study on Stratigraphic Subsidence Induced by Sand Leakage in Tunnel Lining Cracks


    Additional title:

    KSCE J Civ Eng


    Contributors:

    Published in:

    Publication date :

    2020-08-01


    Size :

    8 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Refinement Identification and Evaluation of Tunnel Lining Cracks

    Yu, Chao / Geng, Da-xin / Huang, Zhan-jun et al. | ASCE | 2020


    Cable tunnel lining water leakage detection device and contour modeling method

    WANG XIAOLONG / ZHU JINGJING / GE HAIMING et al. | European Patent Office | 2023

    Free access

    Detection device and method applied to subway tunnel leakage cracks

    SUN KE / ZHOU AIZHAO / WANG LIYAN et al. | European Patent Office | 2023

    Free access

    Tunnel lining tests

    Matsuda, Y. | British Library Online Contents | 2001


    Wind-tunnel acoustic lining

    Online Contents | 1993