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本文介绍了用砂卵石代替碎石作桩身填料,振冲法加固松散软弱灰基的试验研究及灰坝的渗流、液化与动力稳定计算分析。现场试验表明,砂卵石振冲桩加固可以使灰基振冲到密实状态,复合灰基的抗剪强度、承载能力、抗地震液化能力均有显著提高。有限元计算分析表明,灰基用振冲法加固对于改善贮灰场渗流状态,提高贮灰场抗地震液化的能力及灰坝的动力稳定性有显著作用,从而保证了子坝加高的稳定安全。
This paper introduces the experimental research on the use of sand and gravel instead of gravel as pile filler, vibroflotation method to reinforce loose soft ash foundation, and calculation and analysis of seepage, liquefaction and dynamic stability of ash dam. Field tests have shown that sand-pebble vibrating pile reinforcement can make the ash-base vibrating to a compact state, and the composite ash-based shear strength, bearing capacity, and anti-seismic liquefaction capacity are all significantly improved. The finite element calculation analysis shows that the vibratory levitation reinforcement of ash base has significant effects on improving the seepage state of the ash storage yard, improving the anti-seismic liquefaction capacity of the ash storage yard and the dynamic stability of the ash dam, thus ensuring the stability of the sub dam heightening. Safety.