Study on the Criterion of Land Subsidence for Gestation Type Soil Cave

SU Yonghua, ZHOU Qian, JIAN Yilin


In order to evaluate the surface stability during the development of underground holes, the process of surface displacement change during the development of the hole is discretized, and the criterion of surface collapse analysis is established according to the catastrophe theory. The validity of the criterion is preliminarily verified by combining the consistency of the cover instability,the simultaneity of instability, the plasticity penetration criterion and the plastic zone cloud map analysis. The above method is used to quantify the determination process of the surface instability so as to obtain the critical hole radius and surface collapse range. The relationship among the critical thickness of the cover layer, internal friction angle, cohesion, elastic modulus and Poisson's ratio is discussed. The results show that the thickness of the cover layer, the internal friction angle and cohesion can be fitted into a linear relationship with good correlation. The thickness of the cover layer is not sensitive to Poisson's ratio and elastic modulus. The criterion of surface instability based on catastrophe theory can provide a useful reference for the study of surface stability above the developed pore.



Keywords:  catastrophe theory,  instability criterion,  FLAC3D,  land subsidence mechanism

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JIANG X Z,LEI M T,GUAN Z D. Formation mechanism of karst soil-void in single-layer soil structure condition [J]. Carsologica Sinica,2012,31(4):426—432.(In Chinese)

OUYANG Z H. The role of potential soil cavity on ground subsidence and collapse in coal mining area[J]. Journal of Coal Science and Engineering(China),2010,16(3):240—245.

FEHDI C,BAALI F,BOUBAYA D,et al. Detection of sinkholes using 2D electrical resistivity imaging in the Cheria Basin(north-east of Algeria)[J]. Arabian Journal of Geosciences,2011,4(1/2): 181—187.

SAGASETA C. Analysis of undraind soil deformation due to ground loss[J]. Geotechnique,1988,37(3):301—320.

CHEN G L,CHEN Y C,TAN H Z,et al. Study on the mechanism, prediction and regulation of karst ground subsidence [J]. The Chinese Journal of Geological Hazard and Control,1990,1(3):41—50.(In Chinese)

WANG B,HE K Q. Study on limit equilibrium height expression of critical soil cave of karst collapse [J]. Rock and Soil Mechanics, 2006,27(3):458—462(. In Chinese)

WAN Z Q,QIN S Q,LI Z G,et al. Formation mechanism and initial condition of soil cavity[J]. Chinese Journal of Rock Mechanics and Engineering,2003,22(8):1377—1382(. In Chinese)

XIAO W Q. Preliminary exploration on the critical buried depth of the soil cave in karst arear [J]. Carsologica Sinica,2016,35(2):197—201(. In Chinese)

LI T,ZHANG Z Z,ZONG L D. Study of formation mechanism and prediction of sinkholes in soil stratum induced by subterranean cavity [J]. Rock and Soil Mechanics,2015,36 (7):1995—2002(. In Chinese)

SONG G C,YE Y C,LIU Q R. Analysis on the causes and countermeasures of urban road collapse in Beijing[J]. Urban Roads Bridges & Flood Control,2011(8):250—252(. In Chinese)

GONG X B,ZHAO M H,ZHANG Y J. Non-probabilistic reliability analysis method of karst roof stability under pile tip [J]. Journal of Hunan University (Natural Sciences),2011,38 (1):13—17. (In Chinese)

FANG Y,WANG H W,ZHOU C Y,et al. Research on the tunnel face stability influenced by forward concealed cave with internal water pressure[J]. Journal of Hunan University(Natural Sciences), 2017,44(9):142—150.(In Chinese)


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