LI Tian-yu, FAN Qiu-yan, HAN Wei, LIANG Jia-hui. EXPERIMENTAL STUDY ON INFLUENCE OF COVERED KARSTIC FREE SURFACE ON FIXED END BEARING CAPACITY OF LATERALLY LOADED PILE[J]. Engineering Mechanics, 2020, 37(10): 192-199. DOI: 10.6052/j.issn.1000-4750.2019.11.0704
Citation: LI Tian-yu, FAN Qiu-yan, HAN Wei, LIANG Jia-hui. EXPERIMENTAL STUDY ON INFLUENCE OF COVERED KARSTIC FREE SURFACE ON FIXED END BEARING CAPACITY OF LATERALLY LOADED PILE[J]. Engineering Mechanics, 2020, 37(10): 192-199. DOI: 10.6052/j.issn.1000-4750.2019.11.0704

EXPERIMENTAL STUDY ON INFLUENCE OF COVERED KARSTIC FREE SURFACE ON FIXED END BEARING CAPACITY OF LATERALLY LOADED PILE

  • Bedrock surface in karst region is undulating. When laterally loaded piles are fixed nearby covered karstic free surface, the destabilization of the pile may occur and result in the loss of fixed-end bearing capacity. An interior fixed-end model with combined geological conditions of a covered karstic free surface and a weak structural plane is designed, and two working conditions are considered: the free surface is absence of the pile and the free surface is inserted the pile. A lateral loading test was conducted and proved that the existence of the free surface and the structural plane reduces the fixed-end bearing capacity, and that the impact of the free surface before pile is more significant. Based on this result and the limit equilibrium method, a method for calculating the fixed-end bearing capacity of rock mass containing covered karstic free surface and structural plane is proposed. Calculation and test results were compared to validate the assumptions and the method.
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