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| STUDY OF STABILITY JUDGEMENT METHOD OF CONFINED WATER INRUSHING IN FOUNDATION PIT |
| SUN Yuyong1，ZHOU Shunhua2，XIAO Hongju1 |
(1. Department of Civil and Architecture Engineering，Tongling University，Tongling，Anhui 244000，China；2. Key Laboratory
of Road and Traffic Engineering of Ministry of Education，Tongji University，Shanghai 201804，China) |
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Abstract Based on the bursting modes such as overall heaving，water and sand inrushing in contact between soil and underground structures and surface boiling，judgment methods that determine whether inrushing happens were studied by numerical and theoretical analyses. Results show that the rupture surface modes include vertical plane and circular plane with the angle of with impermeable layer. Then the shear force formula of rupture surface was established and a quantitative calculation method to determine whether overall heaving occurs was gained through theoretical derivation. Based on the mechanism of surface boiling and the index of tensile-shear failure，the judgment formulus that determines whether surface boiling happens was gained. By comparison，it is shown that the calculated values have a good agreement with the experimental values.
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Received: 10 May 2011
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2012, Vol. 31 
