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A simplified approach to normalisation of piezocone penetration rate effects
Géotechnique ( IF 5.8 ) Pub Date : 2020-06-16 , DOI: 10.1680/jgeot.18.t.033
Fernando Schnaid 1 , Gracieli Dienstmann 2 , Edgar Odebrecht 3 , Samir Maghous 1
Affiliation  

The influence of factors controlling the rate of penetration during piezocone tests (CPTU) is addressed in the present paper, including a critical appraisal of measurements adopted as input in existing dimensionless analysis. From a heuristic approach, a method is proposed to identify possible consolidation effects taking place during penetration using the velocity factor,
V¯h
. Defined as a direct function of probe size, d, penetration rate, v, and dissipation time, t50, the dimensionless velocity factor
V¯h
is used to demonstrate that normalisation of cone penetration velocity is an important step for assessment of soil properties and for comparative performance of data from different geomaterials. An application is reported to illustrate the normalisation of measured data in soils within the permeability range from 10−5 to 10−8 m/s.


中文翻译:

简化压电锥穿透率效应归一化的简化方法

本文讨论了在压电锥测试(CPTU)中控制渗透速率的因素的影响,包括对现有无量纲分析中作为输入的测量的严格评估。从启发式方法出发,提出了一种使用速度因子来确定穿透过程中可能发生的固结效果的方法,
V¯H
。定义为探头尺寸d,穿透率v和消散时间t 50的直接函数,无因次速度因子
V¯H
用来证明锥入速度的归一化是评估土壤性质和比较不同土工材料数据性能的重要步骤。据报道,有一项应用说明了在10 -5至10 -8  m / s的渗透率范围内的土壤中测量数据的标准化。
更新日期:2020-06-30
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