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Suitability of Different Approaches for Analyzing and Predicting the Behavior of Decomposed Volcanic Rocks

机译:分析和预测已分解火山岩行为的不同方法的适用性

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摘要

Based on a detailed investigation of decomposed volcanic soils from Hong Kong, an extensive analysis has been made of the best approaches for prediction and description of the behavior of the decomposed volcanic rocks, materials that are commonly encountered by practicing engineers worldwide. The parameters considered were compressibility, strength, and in situ specific volume, and the indices considered were plasticity, a grading descriptor (fines content), mineralogy (clay minerals and quartz), and chemical weathering indices. The sampling depth and chemical weathering indices are the most appropriate factors to predict the compressibility of the decomposed volcanic rocks. The strength will be satisfactorily predicted by fines content, clay minerals, plasticity, and chemical weathering indices, whereas the depth, plasticity, and chemical weathering indices are most appropriate for predicting the in situ specific volume. The various approaches (depth, fines, mineralogy, plasticity, and chemical weathering indices) are each suitable for different parameters and are therefore recommended for practicing engineers working on these geomaterials, depending on which properties are needed.
机译:在对香港腐烂的火山岩土壤进行详细调查的基础上,对预测和描述腐烂的火山岩行为的最佳方法进行了广泛的分析,火山灰是世界各地实践工程师普遍遇到的材料。所考虑的参数是可压缩性,强度和原位比体积,所考虑的指标是可塑性,等级描述符(细粉含量),矿物学(粘土矿物和石英)和化学风化指数。采样深度和化学风化指数是预测已分解火山岩可压缩性的最合适因素。强度将由细粉含量,粘土矿物,可塑性和化学风化指数令人满意地预测,而深度,可塑性和化学风化指数最适合预测原位比容。各种方法(深度,细度,矿物学,可塑性和化学风化指数)均适用于不同的参数,因此建议实践工程师根据需要的特性来研究这些土工材料。

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