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STUDY ON DEFORMATION CHARACTERISTICS OF PORT FOUNDATION BY CENTRIFUGAL MODEL
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摘要: 利用目前国内土工离心机中最大的内净空尺寸模型箱和400gt大型离心机进行了港区软弱地基离心模型试验研究,模拟了堆场(与码头连接段)及下卧层在厚达28m吹填粉细砂和55kN/m2使用荷载作用下的沉降量、沉降差及沉降量与时间的关系,并测试吹填砂本身的压缩沉降量及不同深度的密实度、压缩模量和承载力变化等。试验结果表明,大型离心机模型试验是研究上述工程问题的有效手段,所得结论对合理确定地基处理方案、加固处理深度和加固程度以及吹填砂所需方量具有参考价值和指导意义。Abstract: By means of the current largest model box in domestic geotechnical centrifuges and 400gt centrifuge, the foundation of cargo field and its substratum have been studied. The deformation process under 28m thick silty sand fill and 55kN/m2 working load,the time-settlement curve, as well as the compressive deformation, density, modulus of compressibility and bearing capacity of filled sand itself along depth were simulated and predicted. It is indicated that the centrifuge te st results have guidable significance to reasonable determining of both cubic metre of filled sand and the scheme, the depth and the degree of soil improvement.
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Key words:
- foundation /
- filled sand /
- substratum /
- centrifuge model test /
- settlement /
- load /
- bearing capacity
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徐光明,等.离心模型中的粒径效应和边界效应研究.岩土工程学报,1996,18(3):80～86 [2] Taylor R N.Geotechnical Centrifuge Technology.England:Blackie Academic and Professional,1995.21～23 [3] 刘守华.土工离心模拟技术在工程中的应用.江苏水利科技,1989,33(3):6～12 [4] 刘守华.土工离心机的研制与应用.水利水电技术,1990,43(5):60～64 [5] Corte J F, etc.Determination of Model Soil Properties in the Centrifuge.In:Proc.of the International Conference Centrifuge 91.American:A.A Balkema Publishers,1991.607～614 [6] 刘守华.土工离心模型动测十字板现状及其应用.水利水运科技情报,1993,82(3):58～63 [7] 刘守华,蔡正银.土工离心模型填料装置研究.岩土工程学报,1996,18(3):74～79 -
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