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首页> 外文会议>Estuarine and Coastal Fine Sediments Dynamics INTERCOH 2003 >Consolidation and strength evolution ofCaland-Beer Channel mudMeasurement report on laboratory experiments
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Consolidation and strength evolution ofCaland-Beer Channel mudMeasurement report on laboratory experiments

机译：Caland-Beer河道泥浆的固结和强度演化实验室实验报告

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Many harbours in the world suffer from high siltation rates in their basins. To guarantee safernshipping, harbour authorities have to maintain the navigable depth by having dredged largernamounts of mud. Some authorities relate the navigable depth to a depth at which the densityrnis equal to a certain value, e.g. 1200 kg/m3. However, the shear strength might be a morerndirect criterion to relate the navigable depth to.rnA research project is conducted to develop a model to describe the consolidation behaviourrnand strength evolution of mud layers. The second series of experiments for this project,rnexecuted at Delft University of Technology, are described in this report. The analysis of therndata is left for future work.rnThe sedimentation and consolidation of Caland-Beer Channel mud was simulated in seg-rnmented consolidation columns. The use of segments made it possible to obtain well-definedrnand undisturbed samples of the mud bed. For this reason, more accurate shear vane mea-rnsurements of the samples could be done than if conventional consolidation columns had beenrnused.rnFour segmented consolidation columns and one conventional consolidation column werernset up. To study the time evolution of the strength of the mud bed, the segmented columnsrnwere dismantled at different times. After the dismantling, shear vane tests could be carriedrnout and density measurements could be done with a conductivity probe. The density profilesrnof the mud layer in the conventional column were measured with a γ-ray densimeter. Porernwater pressures were measured at several times. From these measurements effective stressesrnand permeabilities were calculated. Various rheological parameters were derived from fourrndifferent types of shear vane measurements. Flow curves were also measured.rnIt turned out that the effective stresses could be approximated by a power law. Further-rnmore, the rheological parameters turned out to be approximately linearly interrelated, evenrnthough the parameters were derived from different types of rheological experiments. Smallrnmodifications of the experimental set-up are recommended for future experiments.
机译：世界上许多港口的流域泥沙淤积率很高。为了确保安全运输，港口当局必须通过疏通大量的泥土来保持通航深度。一些机构将通航深度与密度等于某个值的深度相关，例如。 1200公斤/立方米。然而，抗剪强度可能是与可航行深度相关的更直接的标准。进行了一项研究项目，以开发模型来描述泥浆层的固结特性和强度演化。此报告描述了由代尔夫特理工大学执行的该项目的第二系列实验。对这些数据的分析留待以后的工作。在分段固结柱中模拟了Caland-Beer河道泥浆的沉积和固结。分段的使用使得有可能获得界限分明且不受干扰的泥浆样品。因此，与使用常规固结柱相比，可以对样品进行更精确的剪切叶片测量。安装了四个分段固结柱和一个常规固结柱。为了研究泥床强度随时间的变化，在不同时间拆除了分段柱。拆除后，可以进行剪切叶片测试，并可以使用电导率探针进行密度测量。用γ射线密度计测量常规塔中泥层的密度分布。多次测量了水的压力。从这些测量结果计算出有效应力和渗透率。各种流变参数来自四种不同类型的剪切叶片测量值。还测量了流动曲线。结果证明，有效应力可以通过幂律近似。此外，流变参数被证明是近似线性相关的，即使这些参数是从不同类型的流变实验中得出的。建议对实验设置进行较小的修改，以用于将来的实验。

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  • 会议地点 Gloucester PointVA(US)
  • 作者

    L.M. Merckelbach;

  • 作者单位

    Hydromechanics Section, Faculty of Civil Engineering and Geosciences, Delft University ofrnTechnology, P.O. Box 5048, 2600 GA, the Netherlands. Tel. +31 15 278 40 70 Fax +31 15rn278 59 75 E-mail: l.merckelbach@ct.tudelft.nl;

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  • 正文语种 eng
  • 中图分类 航道工程施工;
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