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2019 Vol. 25, No. 3
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Li WANG, Xinsheng LI, Tonglu LI. LARGE-SCALE IN-SITU SUBMERGING EXPERIMENT ON BURIED GROUND-FISSURES EXPANSION[J]. Journal of Geomechanics, 2019, 25(3): 412-420. doi: 10.12090/j.issn.1006-6616.2019.25.03.038
Citation: Li WANG, Xinsheng LI, Tonglu LI. LARGE-SCALE IN-SITU SUBMERGING EXPERIMENT ON BURIED GROUND-FISSURES EXPANSION[J]. Journal of Geomechanics, 2019, 25(3): 412-420. doi: 10.12090/j.issn.1006-6616.2019.25.03.038
shu

LARGE-SCALE IN-SITU SUBMERGING EXPERIMENT ON BURIED GROUND-FISSURES EXPANSION

  • 1.

    School of Energy and Architecture, Xi'an aerotechnical college, Xi'an 710077, Shannxi, China

  • 2.

    School of Geological and Surveying Engineering, Chang'an university, Xi'an 710054, Shannxi, China

Received Date:  18 January 2018
Revised Date:  14 March 2019
    Abstract
  • Buried ground-fissrues have the potential disaster effects and the randomness of expansion, and surface water is one of the factors that induce the expansion of buried ground-fissrues. Based on field investigation data, two main expansion mechanisms, hydraulic pressure and the loess collapsibility, were qualitatively analyzed. On the basis of this theory, a buried ground-fissures site in Xi'an loess area of Qujiang New District was selected to simulate surface water submerging the ground-fissures. Through the settlement observation, data analysis and numerical simulation, it is concluded that hydraulic pressure is the auxiliary factor that induce the expansion of the buried ground-fissrues, while the differential settlement caused by loess collapsibility on both sides of the ground-fissrues is the main cause. The regional settlement near the buried ground-fissrues is the largest, and the further away from the fissure, the smaller the settlement is. The settlement curve takes on a parabolic pattern, which affirms the ground-fissuers expansion mechanism induced by surface water in shallow loess area. Relevant studies have important significance that will guide us to reveal the expansion mechanism of buried ground-fissures and to control the expansion.
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