Engineering description of mudrocks
Engineering description of mudrocks
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泥岩工程描述
DOI：
10.1144/gsl.qjeg.1992.025.01.02
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
G. M. Pinches
中科院分区：
文献类型：
--
作者：
A. Hawkins;G. M. Pinches
摘要泥岩是用来描述所有非变质泥质矿床的一个术语。提出了泥岩的三重分类：粘土含量小于25%的粉砂岩，粘土含量大于40%的粘土岩和仅限于中间物质的泥岩。“变质岩”用于描述弱变质的泥质岩，其强度和地质力学行为受到了有限的再结晶作用的影响。本文对岩石材料风化、岩体风化、风化等级和风化带、岩石残体和视岩石残体等术语进行了澄清。本文对中等风化岩石和强风化岩石的划分标准进行了评述，并建议在工程地质描述中，对于具有土壤特性的材料，应将其边界修改为200 f，而不是50%。“完全风化”一词应改为“极端风化”。主张对土壤和岩石的描述采用一致的语序，从材料强度开始。建议解决目前在强度描述中使用“to/and”的歧义。为泥质岩强度的识别、描述和现场评价提供了一个辅助工具。
Abstract The term ‘mudrock’ is used to describe all non-metamorphic argillaceous deposits. A three-fold classification of mudrocks is proposed: siltstone comprising less than 25% clay fraction, claystone containing more than 40% clay fraction and mudstone restricted to the intermediate materials. ‘Metamud-rock’ is used to describe weakly metamorphosed argillaceous rocks whose strength and geomechanical behaviour has been affected by the albeit limited re-crystallization. The paper provides clarification of the terms rock material weathering, rock mass weathering, weathering grades and weathering zones, lithorelicts and apparent lithorelicts. The criteria separating moderately and highly weathered rock are reviewed and, for mudrocks, a recommendation made that in engineering geological descriptions the boundary should be amended to 200f the material having soil characteristics rather than 50%. The term ‘completely weathered’ should be replaced by ‘extremely weathered’. A consistent word order for soil and rock descriptions is advocated, beginning with the material strength. Recommendations are made to resolve the present ambiguities in the use of ‘to/and’ in strength descriptions. An aide memoire for the identification, description and field assessment of strength of argillaceous rocks is provided.